Impact of tricyclic antidepressants, selective serotonin reuptake inhibitors, and other antidepressants on overall survival of patients with advanced lung cancer from 2004 to 2014: University of Cincinnati experience
Identifieur interne : 000679 ( Pmc/Corpus ); précédent : 000678; suivant : 000680Impact of tricyclic antidepressants, selective serotonin reuptake inhibitors, and other antidepressants on overall survival of patients with advanced lung cancer from 2004 to 2014: University of Cincinnati experience
Auteurs : Nagla Fawzy Abdel Karim ; Rammey Hassan ; Nabeela Iffat Siddiqi ; Ihab Eldessouki ; Ola Gaber ; Mohamed Rahouma ; Mohamed Kamel ; Mhender Yellu ; Shuchi Gulati ; Changchun Xie ; Mohamed Magdy ; Jane PruemerSource :
- The Journal of International Medical Research [ 0300-0605 ] ; 2019.
Abstract
To evaluate and categorize the survival benefit of tricyclic antidepressants (TCAs) in lung cancer patients based on systematic computational drug repositioning data.
Data were retrospectively extracted from the medical records of non-small cell lung cancer (NSCLC) patients from the University of Cincinnati Cancer Medical Center database. Patients receiving antidepressants during their course of anti-cancer treatment were compared with those without antidepressants. Data were analyzed using Kaplan–Meier survival curves with the log-rank test, and overall survival (OS) was calculated from the date of diagnosis until last follow-up or death.
The median OS at 2 and 5 years for patients on antidepressants was 20.3 months (54.7% and 42%) vs 44.3 months (47.6% and 43.2%), which was not significant. The median OS for patients receiving TCAs, selective serotonin reuptake inhibitors, and other antidepressants was 3.17 months, 31.33 months, and 18.50 months, respectively.
We found no significant survival benefit for TCA use in combination with anti-cancer agents in NSCLC patients.
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DOI: 10.1177/0300060519862469
PubMed: 31640444
PubMed Central: 7045662
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PMC:7045662Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Impact of tricyclic antidepressants, selective serotonin reuptake inhibitors, and other antidepressants on overall survival of patients with advanced lung cancer from 2004 to 2014: University of Cincinnati experience</title><author><name sortKey="Abdel Karim, Nagla Fawzy" sort="Abdel Karim, Nagla Fawzy" uniqKey="Abdel Karim N" first="Nagla Fawzy" last="Abdel Karim">Nagla Fawzy Abdel Karim</name><affiliation><nlm:aff id="aff1-0300060519862469">Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Hassan, Rammey" sort="Hassan, Rammey" uniqKey="Hassan R" first="Rammey" last="Hassan">Rammey Hassan</name><affiliation><nlm:aff id="aff1-0300060519862469">Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Siddiqi, Nabeela Iffat" sort="Siddiqi, Nabeela Iffat" uniqKey="Siddiqi N" first="Nabeela Iffat" last="Siddiqi">Nabeela Iffat Siddiqi</name><affiliation><nlm:aff id="aff1-0300060519862469">Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Eldessouki, Ihab" sort="Eldessouki, Ihab" uniqKey="Eldessouki I" first="Ihab" last="Eldessouki">Ihab Eldessouki</name><affiliation><nlm:aff id="aff1-0300060519862469">Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Gaber, Ola" sort="Gaber, Ola" uniqKey="Gaber O" first="Ola" last="Gaber">Ola Gaber</name><affiliation><nlm:aff id="aff1-0300060519862469">Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Rahouma, Mohamed" sort="Rahouma, Mohamed" uniqKey="Rahouma M" first="Mohamed" last="Rahouma">Mohamed Rahouma</name><affiliation><nlm:aff id="aff2-0300060519862469">Department of Surgical Oncology, Cairo University, Cairo, Egypt</nlm:aff></affiliation></author><author><name sortKey="Kamel, Mohamed" sort="Kamel, Mohamed" uniqKey="Kamel M" first="Mohamed" last="Kamel">Mohamed Kamel</name><affiliation><nlm:aff id="aff2-0300060519862469">Department of Surgical Oncology, Cairo University, Cairo, Egypt</nlm:aff></affiliation></author><author><name sortKey="Yellu, Mhender" sort="Yellu, Mhender" uniqKey="Yellu M" first="Mhender" last="Yellu">Mhender Yellu</name><affiliation><nlm:aff id="aff1-0300060519862469">Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Gulati, Shuchi" sort="Gulati, Shuchi" uniqKey="Gulati S" first="Shuchi" last="Gulati">Shuchi Gulati</name><affiliation><nlm:aff id="aff1-0300060519862469">Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Xie, Changchun" sort="Xie, Changchun" uniqKey="Xie C" first="Changchun" last="Xie">Changchun Xie</name><affiliation><nlm:aff id="aff3-0300060519862469">Division of Biostatistics and Bioinformatics, University of Cincinnati, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Magdy, Mohamed" sort="Magdy, Mohamed" uniqKey="Magdy M" first="Mohamed" last="Magdy">Mohamed Magdy</name><affiliation><nlm:aff id="aff4-0300060519862469">Children’s Cancer Hospital, Cairo, Egypt</nlm:aff></affiliation></author><author><name sortKey="Pruemer, Jane" sort="Pruemer, Jane" uniqKey="Pruemer J" first="Jane" last="Pruemer">Jane Pruemer</name><affiliation><nlm:aff id="aff5-0300060519862469">James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, USA</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">31640444</idno><idno type="pmc">7045662</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7045662</idno><idno type="RBID">PMC:7045662</idno><idno type="doi">10.1177/0300060519862469</idno><date when="2019">2019</date><idno type="wicri:Area/Pmc/Corpus">000679</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000679</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Impact of tricyclic antidepressants, selective serotonin reuptake inhibitors, and other antidepressants on overall survival of patients with advanced lung cancer from 2004 to 2014: University of Cincinnati experience</title><author><name sortKey="Abdel Karim, Nagla Fawzy" sort="Abdel Karim, Nagla Fawzy" uniqKey="Abdel Karim N" first="Nagla Fawzy" last="Abdel Karim">Nagla Fawzy Abdel Karim</name><affiliation><nlm:aff id="aff1-0300060519862469">Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Hassan, Rammey" sort="Hassan, Rammey" uniqKey="Hassan R" first="Rammey" last="Hassan">Rammey Hassan</name><affiliation><nlm:aff id="aff1-0300060519862469">Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Siddiqi, Nabeela Iffat" sort="Siddiqi, Nabeela Iffat" uniqKey="Siddiqi N" first="Nabeela Iffat" last="Siddiqi">Nabeela Iffat Siddiqi</name><affiliation><nlm:aff id="aff1-0300060519862469">Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Eldessouki, Ihab" sort="Eldessouki, Ihab" uniqKey="Eldessouki I" first="Ihab" last="Eldessouki">Ihab Eldessouki</name><affiliation><nlm:aff id="aff1-0300060519862469">Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Gaber, Ola" sort="Gaber, Ola" uniqKey="Gaber O" first="Ola" last="Gaber">Ola Gaber</name><affiliation><nlm:aff id="aff1-0300060519862469">Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Rahouma, Mohamed" sort="Rahouma, Mohamed" uniqKey="Rahouma M" first="Mohamed" last="Rahouma">Mohamed Rahouma</name><affiliation><nlm:aff id="aff2-0300060519862469">Department of Surgical Oncology, Cairo University, Cairo, Egypt</nlm:aff></affiliation></author><author><name sortKey="Kamel, Mohamed" sort="Kamel, Mohamed" uniqKey="Kamel M" first="Mohamed" last="Kamel">Mohamed Kamel</name><affiliation><nlm:aff id="aff2-0300060519862469">Department of Surgical Oncology, Cairo University, Cairo, Egypt</nlm:aff></affiliation></author><author><name sortKey="Yellu, Mhender" sort="Yellu, Mhender" uniqKey="Yellu M" first="Mhender" last="Yellu">Mhender Yellu</name><affiliation><nlm:aff id="aff1-0300060519862469">Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Gulati, Shuchi" sort="Gulati, Shuchi" uniqKey="Gulati S" first="Shuchi" last="Gulati">Shuchi Gulati</name><affiliation><nlm:aff id="aff1-0300060519862469">Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Xie, Changchun" sort="Xie, Changchun" uniqKey="Xie C" first="Changchun" last="Xie">Changchun Xie</name><affiliation><nlm:aff id="aff3-0300060519862469">Division of Biostatistics and Bioinformatics, University of Cincinnati, Cincinnati, USA</nlm:aff></affiliation></author><author><name sortKey="Magdy, Mohamed" sort="Magdy, Mohamed" uniqKey="Magdy M" first="Mohamed" last="Magdy">Mohamed Magdy</name><affiliation><nlm:aff id="aff4-0300060519862469">Children’s Cancer Hospital, Cairo, Egypt</nlm:aff></affiliation></author><author><name sortKey="Pruemer, Jane" sort="Pruemer, Jane" uniqKey="Pruemer J" first="Jane" last="Pruemer">Jane Pruemer</name><affiliation><nlm:aff id="aff5-0300060519862469">James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, USA</nlm:aff></affiliation></author></analytic><series><title level="j">The Journal of International Medical Research</title><idno type="ISSN">0300-0605</idno><idno type="eISSN">1473-2300</idno><imprint><date when="2019">2019</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Objectives</title><p>To evaluate and categorize the survival benefit of tricyclic antidepressants (TCAs) in lung cancer patients based on systematic computational drug repositioning data.</p></sec><sec><title>Methods</title><p>Data were retrospectively extracted from the medical records of non-small cell lung cancer (NSCLC) patients from the University of Cincinnati Cancer Medical Center database. Patients receiving antidepressants during their course of anti-cancer treatment were compared with those without antidepressants. Data were analyzed using Kaplan–Meier survival curves with the log-rank test, and overall survival (OS) was calculated from the date of diagnosis until last follow-up or death.</p></sec><sec><title>Results</title><p>The median OS at 2 and 5 years for patients on antidepressants was 20.3 months (54.7% and 42%) vs 44.3 months (47.6% and 43.2%), which was not significant. The median OS for patients receiving TCAs, selective serotonin reuptake inhibitors, and other antidepressants was 3.17 months, 31.33 months, and 18.50 months, respectively.</p></sec><sec><title>Conclusion</title><p>We found no significant survival benefit for TCA use in combination with anti-cancer agents in NSCLC patients.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Mao, X" uniqKey="Mao X">X Mao</name></author><author><name sortKey="Hou, T" uniqKey="Hou T">T Hou</name></author><author><name sortKey="Cao, B" uniqKey="Cao B">B Cao</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ashton, Jc" uniqKey="Ashton J">JC. 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<front><journal-meta><journal-id journal-id-type="nlm-ta">J Int Med Res</journal-id><journal-id journal-id-type="iso-abbrev">J. Int. Med. Res</journal-id><journal-id journal-id-type="publisher-id">IMR</journal-id><journal-id journal-id-type="hwp">spimr</journal-id><journal-title-group><journal-title>The Journal of International Medical Research</journal-title></journal-title-group><issn pub-type="ppub">0300-0605</issn><issn pub-type="epub">1473-2300</issn><publisher><publisher-name>SAGE Publications</publisher-name><publisher-loc>Sage UK: London, England</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">31640444</article-id><article-id pub-id-type="pmc">7045662</article-id><article-id pub-id-type="doi">10.1177/0300060519862469</article-id><article-id pub-id-type="publisher-id">10.1177_0300060519862469</article-id><article-categories><subj-group subj-group-type="heading"><subject>Clinical Research Reports</subject></subj-group></article-categories><title-group><article-title>Impact of tricyclic antidepressants, selective serotonin reuptake inhibitors, and other antidepressants on overall survival of patients with advanced lung cancer from 2004 to 2014: University of Cincinnati experience</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Abdel Karim</surname><given-names>Nagla Fawzy</given-names></name><xref ref-type="aff" rid="aff1-0300060519862469">1</xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid" authenticated="false">https://orcid.org/0000-0001-7960-1201</contrib-id><name><surname>Hassan</surname><given-names>Rammey</given-names></name><xref ref-type="aff" rid="aff1-0300060519862469">1</xref></contrib><contrib contrib-type="author"><name><surname>Siddiqi</surname><given-names>Nabeela Iffat</given-names></name><xref ref-type="aff" rid="aff1-0300060519862469">1</xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid" authenticated="false">https://orcid.org/0000-0002-1325-2579</contrib-id><name><surname>Eldessouki</surname><given-names>Ihab</given-names></name><xref ref-type="aff" rid="aff1-0300060519862469">1</xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid" authenticated="false">https://orcid.org/0000-0003-3113-8902</contrib-id><name><surname>Gaber</surname><given-names>Ola</given-names></name><xref ref-type="aff" rid="aff1-0300060519862469">1</xref><xref ref-type="corresp" rid="corresp1-0300060519862469"></xref></contrib><contrib contrib-type="author"><name><surname>Rahouma</surname><given-names>Mohamed</given-names></name><xref ref-type="aff" rid="aff2-0300060519862469">2</xref></contrib><contrib contrib-type="author"><name><surname>Kamel</surname><given-names>Mohamed</given-names></name><xref ref-type="aff" rid="aff2-0300060519862469">2</xref></contrib><contrib contrib-type="author"><name><surname>Yellu</surname><given-names>Mhender</given-names></name><xref ref-type="aff" rid="aff1-0300060519862469">1</xref></contrib><contrib contrib-type="author"><name><surname>Gulati</surname><given-names>Shuchi</given-names></name><xref ref-type="aff" rid="aff1-0300060519862469">1</xref></contrib><contrib contrib-type="author"><name><surname>Xie</surname><given-names>Changchun</given-names></name><xref ref-type="aff" rid="aff3-0300060519862469">3</xref></contrib><contrib contrib-type="author"><name><surname>Magdy</surname><given-names>Mohamed</given-names></name><xref ref-type="aff" rid="aff4-0300060519862469">4</xref></contrib><contrib contrib-type="author"><name><surname>Pruemer</surname><given-names>Jane</given-names></name><xref ref-type="aff" rid="aff5-0300060519862469">5</xref></contrib><aff id="aff1-0300060519862469"><label>1</label>Department of Oncology, University of Cincinnati Medical Center, Cincinnati, USA</aff><aff id="aff2-0300060519862469"><label>2</label>Department of Surgical Oncology, Cairo University, Cairo, Egypt</aff><aff id="aff3-0300060519862469"><label>3</label>Division of Biostatistics and Bioinformatics, University of Cincinnati, Cincinnati, USA</aff><aff id="aff4-0300060519862469"><label>4</label>Children’s Cancer Hospital, Cairo, Egypt</aff><aff id="aff5-0300060519862469"><label>5</label>James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, USA</aff></contrib-group><author-notes><corresp id="corresp1-0300060519862469">Ola Gaber, Vontz Center- University of Cincinnati, 3125 Eden Avenue, Cincinnati, OH 45267, USA. Email: <email>drs_olagaber@yahoo.com</email></corresp></author-notes><pub-date pub-type="epub"><day>23</day><month>10</month><year>2019</year></pub-date><pub-date pub-type="ppub"><month>12</month><year>2019</year></pub-date><volume>47</volume><issue>12</issue><fpage>6016</fpage><lpage>6026</lpage><history><date date-type="received"><day>23</day><month>10</month><year>2018</year></date><date date-type="accepted"><day>18</day><month>6</month><year>2019</year></date></history><permissions><copyright-statement>© The Author(s) 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder content-type="sage">SAGE Publications</copyright-holder><license license-type="creative-commons" xlink:href="http://creativecommons.org/licenses/by-nc/4.0/"><license-p>Creative Commons Non Commercial CC BY-NC: This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (<ext-link ext-link-type="uri" xlink:href="http://www.creativecommons.org/licenses/by-nc/4.0/">http://www.creativecommons.org/licenses/by-nc/4.0/</ext-link>) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (<ext-link ext-link-type="uri" xlink:href="https://us.sagepub.com/en-us/nam/open-access-at-sage">https://us.sagepub.com/en-us/nam/open-access-at-sage</ext-link>).</license-p></license></permissions><abstract abstract-type="short"><sec><title>Objectives</title><p>To evaluate and categorize the survival benefit of tricyclic antidepressants (TCAs) in lung cancer patients based on systematic computational drug repositioning data.</p></sec><sec><title>Methods</title><p>Data were retrospectively extracted from the medical records of non-small cell lung cancer (NSCLC) patients from the University of Cincinnati Cancer Medical Center database. Patients receiving antidepressants during their course of anti-cancer treatment were compared with those without antidepressants. Data were analyzed using Kaplan–Meier survival curves with the log-rank test, and overall survival (OS) was calculated from the date of diagnosis until last follow-up or death.</p></sec><sec><title>Results</title><p>The median OS at 2 and 5 years for patients on antidepressants was 20.3 months (54.7% and 42%) vs 44.3 months (47.6% and 43.2%), which was not significant. The median OS for patients receiving TCAs, selective serotonin reuptake inhibitors, and other antidepressants was 3.17 months, 31.33 months, and 18.50 months, respectively.</p></sec><sec><title>Conclusion</title><p>We found no significant survival benefit for TCA use in combination with anti-cancer agents in NSCLC patients.</p></sec></abstract><kwd-group><kwd>Lung cancer</kwd><kwd>tricyclic antidepressants</kwd><kwd>SSRIs</kwd><kwd>drug repositioning</kwd><kwd>apoptosis</kwd><kwd>overall survival</kwd></kwd-group><custom-meta-group><custom-meta><meta-name>typesetter</meta-name><meta-value>ts2</meta-value></custom-meta></custom-meta-group></article-meta></front><body><sec sec-type="intro" id="sec1-0300060519862469"><title>Introduction</title><p>Tricyclic antidepressants (TCAs) are one of the earliest medications used for depression, and function by blocking norepinephrine and serotonin reuptake. Through drug repositioning and validation in preclinical models, TCAs were identified as potent inducers of cell death in small cell lung cancer (SCLC) cells by activating stress pathways. Specifically, they induced apoptosis in both chemo-naïve and chemo-resistant human SCLC tumor cells by blocking G-protein-coupled receptors, which inhibited protein kinase A. The TCA amitriptyline has both pro-apoptotic and anti-myeloma activities and is non-toxic to healthy blood cells.<sup><xref rid="bibr1-0300060519862469" ref-type="bibr">1</xref></sup> New antidepressants such as selective serotonin reuptake inhibitors (SSRIs) have a more favorable toxicity profile compared with TCAs, so TCAs are no longer the first choice of initial treatment for depression although they were shown to be safe for lung cancer patients in particular.<sup><xref rid="bibr2-0300060519862469" ref-type="bibr">2</xref></sup> SSRIs also possess anti-cancerous properties by inhibiting cancer cell proliferation and inducing apoptosis.<sup><xref rid="bibr3-0300060519862469" ref-type="bibr">3</xref></sup> However, for SCLC and other neuroendocrine cancers, TCAs had significant anti-tumor effects in preclinical studies that were comparable to existing chemotherapy regimens. The exact mechanism of these effects is unclear.<sup><xref rid="bibr4-0300060519862469" ref-type="bibr">4</xref></sup></p><p>Today, lung cancer is the leading cause of cancer deaths in the United States<sup><xref rid="bibr5-0300060519862469" ref-type="bibr">5</xref></sup> and the main cause of cancer deaths in both men and women in developed countries.<sup><xref rid="bibr6-0300060519862469" ref-type="bibr">6</xref></sup> Non-small cell lung cancer (NSCLC) is the predominant lung cancer disease, but the effect of TCAs on NSCLC tumor cells is poorly studied.<sup><xref rid="bibr7-0300060519862469" ref-type="bibr">7</xref></sup> SCLC is the more aggressive form with frequent early metastases, and the disease is usually asymptomatic until an advanced stage.<sup><xref rid="bibr4-0300060519862469" ref-type="bibr">4</xref></sup> Although SCLC is a chemo-and radio-sensitive disease that usually responds to initial treatment, recurrence is very common, with only 6% of patients surviving 5 years from their initial diagnosis. Cisplatin or carboplatin with etoposide is the first-line chemotherapeutic regimen for both limited and extensive SCLC; this has not changed over the past four decades despite advances in cancer treatment. This combination therapy yields optimal tumor response rates as high as 60% to 80%, but a cure is only achieved in 20% of patients with limited-stage disease.<sup><xref rid="bibr8-0300060519862469" ref-type="bibr">8</xref></sup> Therefore, a conscious effort to find accessible, effective agents to improve patient care is warranted.</p><p>Recent advances in computational capacity have enabled more sophisticated computer-assisted drugs to be designed. For example, molecular docking is a computer simulation procedure that predicts the conformation of a receptor–ligand complex, while protein structures determined experimentally by X-ray crystallography or nuclear magnetic resonance have been publicly available for some time. Additionally, many algorithms are available to assess and rationalize ligand–protein or protein–protein interactions. The success of the algorithm in predicting ligand binding is usually measured by the root-mean-squared deviation between experimentally-observed heavy atom positions of the ligands and what was predicted by the algorithm.<sup><xref rid="bibr9-0300060519862469" ref-type="bibr">9</xref></sup> With the continuing use of this novel approach, algorithms have become faster and more accurate.</p><p>Through the development of <italic>in silico</italic> analysis, drug repositioning is finding new indications for existing drugs.<sup><xref rid="bibr10-0300060519862469" ref-type="bibr">10</xref></sup> Not only is this beneficial for known safety, dosage, and toxicity, but it also saves time and money with regard to development.<sup><xref rid="bibr11-0300060519862469" ref-type="bibr">11</xref><xref rid="bibr12-0300060519862469" ref-type="bibr"></xref><xref rid="bibr13-0300060519862469" ref-type="bibr"></xref>–<xref rid="bibr14-0300060519862469" ref-type="bibr">14</xref></sup> This can be especially beneficial in patients expressing markers for enhanced metastatic potential.<sup><xref rid="bibr15-0300060519862469" ref-type="bibr">15</xref></sup> Drug repositioning studies have shown promise in complex diseases needing improved therapeutic interventions as well as in diseases lacking effective treatments.<sup><xref rid="bibr16-0300060519862469" ref-type="bibr">16</xref>,<xref rid="bibr17-0300060519862469" ref-type="bibr">17</xref></sup> In this study, we retrospectively explored the effect of using TCAs in combination with anti-cancer agents in NSCLC patients treated in our hospital, thus identifying the benefit of this combination therapy.</p></sec><sec sec-type="Materials|methods" id="sec2-0300060519862469"><title>Materials and methods</title><sec id="sec3-0300060519862469"><title>Patients and data collection</title><p>We retrospectively reviewed the University of Cincinnati Medical Center database and Epic patient medical records, and enrolled patients with NSCLC who underwent evaluation and treatment between January 2004 and December 2014. We compared patients who received antidepressants in the form of TCAs, SSRIs, and other drugs with those who received no antidepressants (Control group). We excluded patients treated at other hospitals. Patient demographics and clinical and pathological data were retrieved from the medical records. Analyzed variables included age, sex, race, histology, tumor–node–metastasis stage, type of treatment, and survival data.<sup><xref rid="bibr18-0300060519862469" ref-type="bibr">18</xref>,<xref rid="bibr19-0300060519862469" ref-type="bibr">19</xref></sup> All cases received platinum-based regimes. This study was approved by the review board and ethical committee of the University of Cincinnati Hospital.</p></sec><sec id="sec4-0300060519862469"><title>Statistical methods</title><p>The primary outcome was overall survival (OS) which was analyzed using Kaplan–Meier survival curves with the log-rank test and was calculated from the date of diagnosis until the last follow-up or death. The Cox regression model was used to estimate the hazard ratio (HR) and 95% confidence intervals (95% CI) for long-term mortality in an unadjusted model and after adjustment based on age, sex, and stage. <italic>P</italic> < 0.05 was considered significant.</p><p>Secondary outcomes were: 1) predictors of antidepressant use using Chi-squared and Mann–Whitney U tests, 2) OS among the whole cohort, and 3) OS among patients receiving different antidepressants (TCAs, SSRIs, and others) vs the non-antidepressant cohort.</p><p>Categorical variables were reported as absolute numbers (frequency percentages) and compared using the Chi-squared test, while continuous variables were presented as medians and interquartile ranges (IQR) and compared using the Mann–Whitney U test.</p><p>Statistical analyses were performed using IBM SPSS Statistics for Windows, version 22.0 (IBM Corp., Armonk, NY, USA) and IBM SPSS Statistics-Essentials for R 22.0.</p></sec></sec><sec sec-type="results" id="sec5-0300060519862469"><title>Results</title><sec id="sec6-0300060519862469"><title>Demographics</title><p>Data for 174 NSCLC patients were retrieved from the University of Cincinnati database. Thirty-four patients received antidepressants during their treatment course. The median age at diagnosis was 61 years (IQR: 55–69 years) and the majority of patients were men (55.7%). Adenocarcinoma patients were the most frequent subgroup followed by squamous cell lung cancer.</p><p>More female patients received antidepressants during their active treatment than male patients (female [f] = 28.6%, male [m] = 12.4%), and SSRIs were the most commonly used antidepressant in both sexes (f = 16.9%, m = 6.2%), followed by other antidepressants (f = 9.1%, m = 5.2%), with TCAs the least common (f = 2.6%, m = 1%; <xref rid="table1-0300060519862469" ref-type="table">Tables 1</xref><xref rid="table2-0300060519862469" ref-type="table"></xref>–<xref rid="table3-0300060519862469" ref-type="table">3</xref>).</p><table-wrap id="table1-0300060519862469" orientation="portrait" position="float"><label>Table 1.</label><caption><p>Patient demographics.</p></caption><alternatives><graphic specific-use="table1-0300060519862469" xlink:href="10.1177_0300060519862469-table1"></graphic><table frame="hsides" rules="groups"><tbody valign="top"><tr><td colspan="2" rowspan="1">Sex</td></tr><tr><td rowspan="1" colspan="1"> Male</td><td align="char" char="(" rowspan="1" colspan="1">97 (55.7%)</td></tr><tr><td rowspan="1" colspan="1"> Female</td><td align="char" char="(" rowspan="1" colspan="1">77 (44.3%)</td></tr><tr><td colspan="2" rowspan="1">Age (years)</td></tr><tr><td rowspan="1" colspan="1"> Median (IQR)</td><td align="char" char="(" rowspan="1" colspan="1">61 (55-69)</td></tr><tr><td colspan="2" rowspan="1">Histopathological subtypes</td></tr><tr><td rowspan="1" colspan="1"> NSCLC, A</td><td align="char" char="(" rowspan="1" colspan="1">103 (59.2%)</td></tr><tr><td rowspan="1" colspan="1"> NSCLC, SCC</td><td align="char" char="(" rowspan="1" colspan="1">59 (33.7%)</td></tr><tr><td rowspan="1" colspan="1"> NSCLC, Mixed Adeno/Squamous</td><td align="char" char="(" rowspan="1" colspan="1">3 (1.7%)</td></tr><tr><td rowspan="1" colspan="1"> NSCLC undifferentiated</td><td align="char" char="(" rowspan="1" colspan="1">9 (5.2%)</td></tr><tr><td rowspan="1" colspan="1">Median overall survival</td><td rowspan="1" colspan="1">38.4 months</td></tr></tbody></table></alternatives><table-wrap-foot><fn id="table-fn1-0300060519862469"><p>IQR, interquartile range; NSCLC, non-small cell lung cancer; SCC, squamous cell carcinoma.</p></fn></table-wrap-foot></table-wrap><table-wrap id="table2-0300060519862469" orientation="portrait" position="float"><label>Table 2.</label><caption><p>Antidepressant prescription according to variables.</p></caption><alternatives><graphic specific-use="table2-0300060519862469" xlink:href="10.1177_0300060519862469-table2"></graphic><table frame="hsides" rules="groups"><thead valign="top"><tr><th rowspan="1" colspan="1">Variables</th><th rowspan="1" colspan="1">Control (n = 140)</th><th rowspan="1" colspan="1">Antidepressants (n = 34)</th><th rowspan="1" colspan="1">Total (n = 174)</th><th rowspan="1" colspan="1"><italic>P</italic> value<sup>¶</sup></th></tr></thead><tbody valign="top"><tr><td rowspan="1" colspan="1">Age, years (median, IQR)</td><td align="char" char="(" rowspan="1" colspan="1">62 (56–70)</td><td align="char" char="(" rowspan="1" colspan="1">59 (5075–65.50)</td><td align="char" char="(" rowspan="1" colspan="1">61 (55–69)</td><td align="char" char="." rowspan="1" colspan="1">0.046<sup>†</sup></td></tr><tr><td rowspan="1" colspan="1">Age, years</td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> <40</td><td align="char" char="(" rowspan="1" colspan="1">1 (50.0%)</td><td align="char" char="(" rowspan="1" colspan="1">1 (50.0%)</td><td align="char" char="(" rowspan="1" colspan="1">2 (100.0%)</td><td align="char" char="." rowspan="1" colspan="1">0.172</td></tr><tr><td rowspan="1" colspan="1"> 40–59</td><td align="char" char="(" rowspan="1" colspan="1">43 (72.9%)</td><td align="char" char="(" rowspan="1" colspan="1">16 (27.1%)</td><td align="char" char="(" rowspan="1" colspan="1">59 (100.0%)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> 60–79</td><td align="char" char="(" rowspan="1" colspan="1">76 (82.6%)</td><td align="char" char="(" rowspan="1" colspan="1">16 (17.4%)</td><td align="char" char="(" rowspan="1" colspan="1">92 (100.0%)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> ≥80</td><td align="char" char="(" rowspan="1" colspan="1">14 (93.3%)</td><td align="char" char="(" rowspan="1" colspan="1">1 (6.7%)</td><td align="char" char="(" rowspan="1" colspan="1">15 (100.0%)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1">Sex</td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> Male</td><td align="char" char="(" rowspan="1" colspan="1">85 (87.6%)</td><td align="char" char="(" rowspan="1" colspan="1">12 (12.4%)</td><td align="char" char="(" rowspan="1" colspan="1">97 (100.0%)</td><td align="char" char="." rowspan="1" colspan="1">0.007</td></tr><tr><td rowspan="1" colspan="1"> Female</td><td align="char" char="(" rowspan="1" colspan="1">55 (71.4%)</td><td align="char" char="(" rowspan="1" colspan="1">22 (28.6%)</td><td align="char" char="(" rowspan="1" colspan="1">77 (100.0%)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1">Race</td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> White</td><td align="char" char="(" rowspan="1" colspan="1">63 (76.8%)</td><td align="char" char="(" rowspan="1" colspan="1">19 (23.2%)</td><td align="char" char="(" rowspan="1" colspan="1">31 (100.0%)</td><td align="char" char="." rowspan="1" colspan="1">0.545</td></tr><tr><td rowspan="1" colspan="1"> Black</td><td align="char" char="(" rowspan="1" colspan="1">26 (83.9%)</td><td align="char" char="(" rowspan="1" colspan="1">5 (16.1%)</td><td align="char" char="(" rowspan="1" colspan="1">82 (100.0%)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> Asian</td><td align="char" char="(" rowspan="1" colspan="1">2 (100.0%)</td><td align="char" char="(" rowspan="1" colspan="1">0 (0.0%)</td><td align="char" char="(" rowspan="1" colspan="1">2 (100.0%)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1">Tumor stage</td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> Stage I</td><td align="char" char="(" rowspan="1" colspan="1">10 (100%)</td><td align="char" char="(" rowspan="1" colspan="1">0 (0%)</td><td align="char" char="(" rowspan="1" colspan="1">10 (100.0%)</td><td align="char" char="." rowspan="1" colspan="1">0.208</td></tr><tr><td rowspan="1" colspan="1"> Stage II</td><td align="char" char="(" rowspan="1" colspan="1">13 (68.4%)</td><td align="char" char="(" rowspan="1" colspan="1">6 (31.6%)</td><td align="char" char="(" rowspan="1" colspan="1">19 (100.0%)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> Stage III</td><td align="char" char="(" rowspan="1" colspan="1">33 (76.7%)</td><td align="char" char="(" rowspan="1" colspan="1">10 (23.3%)</td><td align="char" char="(" rowspan="1" colspan="1">43 (100.0%)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> Stage IV</td><td align="char" char="(" rowspan="1" colspan="1">76 (81.7%)</td><td align="char" char="(" rowspan="1" colspan="1">17 (18.3%)</td><td align="char" char="(" rowspan="1" colspan="1">93 (100.0%)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1">Statin</td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> No</td><td align="char" char="(" rowspan="1" colspan="1">111 (82.2%)</td><td align="char" char="(" rowspan="1" colspan="1">24 (17.8%)</td><td align="char" char="(" rowspan="1" colspan="1">135 (100.0%)</td><td align="char" char="." rowspan="1" colspan="1">0.275</td></tr><tr><td rowspan="1" colspan="1"> Yes</td><td align="char" char="(" rowspan="1" colspan="1">29 (74.4%)</td><td align="char" char="(" rowspan="1" colspan="1">10 (25.6%)</td><td align="char" char="(" rowspan="1" colspan="1">39 (100.0%)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1">Follow-up, months (Median; 95% CI)</td><td align="char" char="(" rowspan="1" colspan="1">40 (33.82–46.18)</td><td align="char" char="(" rowspan="1" colspan="1">36.67 (29.03–44.30)</td><td align="char" char="(" rowspan="1" colspan="1">40 (35.70–44.30)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1">Overall survival, median (2 and 5 years)</td><td rowspan="1" colspan="1">44.3 months (47.6% and 43.2%)</td><td rowspan="1" colspan="1">20.3 months (54.7% and 42%)</td><td rowspan="1" colspan="1">38.4 months</td><td align="char" char="." rowspan="1" colspan="1">0.466</td></tr></tbody></table></alternatives><table-wrap-foot><fn id="table-fn2-0300060519862469"><p>IQR, interquartile range; CI, confidence interval; <sup>¶</sup>Chi squared test, <sup>†</sup>Mann–Whitney U test.</p></fn></table-wrap-foot></table-wrap><table-wrap id="table3-0300060519862469" orientation="portrait" position="float"><label>Table 3.</label><caption><p>Antidepressant prescription by class according to age and sex.</p></caption><alternatives><graphic specific-use="table3-0300060519862469" xlink:href="10.1177_0300060519862469-table3"></graphic><table frame="hsides" rules="groups"><thead valign="top"><tr><th rowspan="1" colspan="1">Variable</th><th rowspan="1" colspan="1">Control group</th><th rowspan="1" colspan="1">TCA</th><th rowspan="1" colspan="1">SSRI</th><th rowspan="1" colspan="1">Other</th><th rowspan="1" colspan="1"><italic>P</italic> value<sup>¶</sup></th></tr></thead><tbody valign="top"><tr><td rowspan="1" colspan="1">Age, years</td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> <40</td><td align="char" char="(" rowspan="1" colspan="1">1 (50.0%)</td><td align="char" char="(" rowspan="1" colspan="1">0 (0.0%)</td><td align="char" char="(" rowspan="1" colspan="1">0 (0.0%)</td><td align="char" char="(" rowspan="1" colspan="1">1 (50.0%)</td><td align="char" char="." rowspan="1" colspan="1">0.309</td></tr><tr><td rowspan="1" colspan="1"> 40–59</td><td align="char" char="(" rowspan="1" colspan="1">43 (72.9%)</td><td align="char" char="(" rowspan="1" colspan="1">1 (1.7%)</td><td align="char" char="(" rowspan="1" colspan="1">10 (16.9%)</td><td align="char" char="(" rowspan="1" colspan="1">5 (8.5%)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> 60–79</td><td align="char" char="(" rowspan="1" colspan="1">76 (82.6%)</td><td align="char" char="(" rowspan="1" colspan="1">2 (2.2%)</td><td align="char" char="(" rowspan="1" colspan="1">8 (8.7%)</td><td align="char" char="(" rowspan="1" colspan="1">6 (6.5%)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> ≥80</td><td align="char" char="(" rowspan="1" colspan="1">14 (93.3%)</td><td align="char" char="(" rowspan="1" colspan="1">0 (0.0%)</td><td align="char" char="(" rowspan="1" colspan="1">1 (6.7%)</td><td align="char" char="(" rowspan="1" colspan="1">0 (0.0%)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1">Sex</td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td><td align="char" char="(" rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> Male</td><td align="char" char="(" rowspan="1" colspan="1">85 (87.6%)</td><td align="char" char="(" rowspan="1" colspan="1">1(1.0%)</td><td align="char" char="(" rowspan="1" colspan="1">6 (6.2%)</td><td align="char" char="(" rowspan="1" colspan="1">5 (5.2%)</td><td align="char" char="." rowspan="1" colspan="1">0.058</td></tr><tr><td rowspan="1" colspan="1"> Female</td><td align="char" char="(" rowspan="1" colspan="1">55 (71.4%)</td><td align="char" char="(" rowspan="1" colspan="1">2(2.6%)</td><td align="char" char="(" rowspan="1" colspan="1">13 (16.9%)</td><td align="char" char="(" rowspan="1" colspan="1">7 (9.1%)</td><td align="char" char="(" rowspan="1" colspan="1"></td></tr></tbody></table></alternatives><table-wrap-foot><fn id="table-fn3-0300060519862469"><p>TCA, tricyclic antidepressants; SSRI, selective serotonin reuptake inhibitors.</p></fn></table-wrap-foot></table-wrap><p>The relationship between age and antidepressant intake was inversely proportional (<italic>P</italic> = 0.046), with patients younger than 40 years having the highest rate of antidepressant prescription during their treatment (50%) compared with 27.1%, 17.4%, and 6.7% for patients aged >40, >60, and >80 years, respectively (<xref rid="table2-0300060519862469" ref-type="table">Table 2</xref>). More detailed demographic age analysis according to antidepressant class is presented in <xref rid="table3-0300060519862469" ref-type="table">Table 3</xref>.</p><p>Antidepressant usage was highest among patients with white ethnicity, but the difference was not statistically significant (white = 23.2%, black = 16.1%, Asian = 0%). Similarly, there was no significant difference in antidepressant usage between patients at different stages of disease (0%, 31.6%, 23.3%, and 18.3% for stages I, II, III, and IV, respectively; <xref rid="table2-0300060519862469" ref-type="table">Table 2)</xref>.</p></sec><sec id="sec7-0300060519862469"><title>Survival analyses</title><p>The median overall follow-up time was 40 months (95% CI 35.70–44.30); follow-up times for antidepressant and non-antidepressant groups were 36.67 months (95% CI 29.03–44.30) and 40 months (95% CI 33.82–46.18), respectively.</p><p>The median OS for the entire cohort was 38.4 months. The median OS at 2 and 5 years for patients receiving antidepressants was 20.3 months (54.7% and 42%, respectively) vs 44.3 months (47.6% and 43.2%, respectively) in the control group. <xref ref-type="fig" rid="fig1-0300060519862469">Figure 1</xref> shows the unadjusted Cox regression estimated HR for long-term mortality in the antidepressant group compared with the control group (HR: 1.23 [95% CI 0.71–2.12]), which was further confirmed after adjustment for age, sex, and stage (HR: 1.21 [95% CI 0.67–2.20]; <xref rid="table4-0300060519862469" ref-type="table">Tables 4</xref> and <xref rid="table5-0300060519862469" ref-type="table">5</xref>, <xref ref-type="fig" rid="fig2-0300060519862469">Figure 2</xref>).</p><fig id="fig1-0300060519862469" orientation="portrait" position="float"><label>Figure 1.</label><caption><p>Unadjusted Kaplan–Meier overall survival curves for antidepressant vs control groups.</p></caption><graphic xlink:href="10.1177_0300060519862469-fig1"></graphic></fig><table-wrap id="table4-0300060519862469" orientation="portrait" position="float"><label>Table 4.</label><caption><p>Cox regression-estimated hazard ratio for overall survival in antidepressant patients compared with controls.</p></caption><alternatives><graphic specific-use="table4-0300060519862469" xlink:href="10.1177_0300060519862469-table4"></graphic><table frame="hsides" rules="groups"><thead valign="top"><tr><th rowspan="1" colspan="1">Variable</th><th rowspan="1" colspan="1">HR</th><th rowspan="1" colspan="1">95% confidence interval</th><th rowspan="1" colspan="1"><italic>P</italic> value<sup>¶</sup></th></tr></thead><tbody valign="top"><tr><td rowspan="1" colspan="1">Unadjusted model</td><td rowspan="1" colspan="1">1.23</td><td rowspan="1" colspan="1">0.71–2.12</td><td rowspan="1" colspan="1">0.467</td></tr><tr><td rowspan="1" colspan="1">Adjusted model (age, sex, stage)</td><td rowspan="1" colspan="1">1.21</td><td rowspan="1" colspan="1">0.67–2.20</td><td rowspan="1" colspan="1">0.533</td></tr></tbody></table></alternatives><table-wrap-foot><fn id="table-fn4-0300060519862469"><p>HR, hazard ratio; OS, overall survival.</p></fn></table-wrap-foot></table-wrap><table-wrap id="table5-0300060519862469" orientation="portrait" position="float"><label>Table 5.</label><caption><p>Median overall survival for each study arm.</p></caption><alternatives><graphic specific-use="table5-0300060519862469" xlink:href="10.1177_0300060519862469-table5"></graphic><table frame="hsides" rules="groups"><thead valign="top"><tr><th rowspan="1" colspan="1">Drug</th><th rowspan="1" colspan="1">N</th><th rowspan="1" colspan="1">Deaths</th><th rowspan="1" colspan="1">Censored</th><th rowspan="1" colspan="1">Median OS</th><th rowspan="1" colspan="1"><italic>P</italic> value<sup>¶</sup></th><th rowspan="1" colspan="1">Hazard ratio (95% CI)<sup>†</sup></th></tr></thead><tbody valign="top"><tr><td rowspan="1" colspan="1">Antidepressant group</td><td rowspan="1" colspan="1">34</td><td rowspan="1" colspan="1">16</td><td rowspan="1" colspan="1">18</td><td rowspan="1" colspan="1">44.3 months</td><td rowspan="1" colspan="1">–</td><td rowspan="1" colspan="1">Reference</td></tr><tr><td rowspan="1" colspan="1">Control group</td><td rowspan="1" colspan="1">140</td><td rowspan="1" colspan="1">68</td><td rowspan="1" colspan="1">72</td><td rowspan="1" colspan="1">20.3 months</td><td rowspan="1" colspan="1">0.467</td><td rowspan="1" colspan="1">1.23 (0.71–2.12)</td></tr></tbody></table></alternatives><table-wrap-foot><fn id="table-fn5-0300060519862469"><p>OS, overall survival; CI, confidence interval; <sup>¶</sup>Log rank test, <sup>†</sup>Unadjusted HR.</p></fn></table-wrap-foot></table-wrap><fig id="fig2-0300060519862469" orientation="portrait" position="float"><label>Figure 2.</label><caption><p>Cox regression-adjusted Kaplan–Meier overall survival curves for antidepressant vs control groups. Adjustment was for age, sex, and stage.</p></caption><graphic xlink:href="10.1177_0300060519862469-fig2"></graphic></fig><p>The overall longest survival time at which at least 75% of patients survived was 8.33 months. In the antidepressant group, this was 4.83 months (3.17, 7.17, and 4.33 months for TCA, SSRI, and other subgroups, respectively) compared with 10.25 months in the control group (<xref rid="table6-0300060519862469" ref-type="table">Table 6</xref>).</p><table-wrap id="table6-0300060519862469" orientation="portrait" position="float"><label>Table 6.</label><caption><p>Overall survival for antidepressant groups compared with the control arm and the risk of dying.</p></caption><alternatives><graphic specific-use="table6-0300060519862469" xlink:href="10.1177_0300060519862469-table6"></graphic><table frame="hsides" rules="groups"><thead valign="top"><tr><th rowspan="1" colspan="1">Drug</th><th rowspan="1" colspan="1">N</th><th rowspan="1" colspan="1">Deaths</th><th rowspan="1" colspan="1">Censored</th><th rowspan="1" colspan="1">OS in study arm (months)</th><th rowspan="1" colspan="1">OS in control arm (months)</th><th rowspan="1" colspan="1"><italic>P</italic> value<sup>¶</sup></th><th rowspan="1" colspan="1">Hazard ratio (95% CI)</th></tr></thead><tbody valign="top"><tr><td rowspan="1" colspan="1">TCA</td><td align="char" char="." rowspan="1" colspan="1">3</td><td align="char" char="." rowspan="1" colspan="1">2</td><td align="char" char="." rowspan="1" colspan="1">1</td><td align="char" char="." rowspan="1" colspan="1">3.17</td><td align="char" char="." rowspan="1" colspan="1">44.25</td><td align="char" char="." rowspan="1" colspan="1">0.002</td><td align="char" char="(" rowspan="1" colspan="1">6.72 (1.59–28.48)</td></tr><tr><td rowspan="1" colspan="1">SSRI</td><td align="char" char="." rowspan="1" colspan="1">19</td><td align="char" char="." rowspan="1" colspan="1">8</td><td align="char" char="." rowspan="1" colspan="1">11</td><td align="char" char="." rowspan="1" colspan="1">31.33</td><td align="char" char="." rowspan="1" colspan="1">44.25</td><td align="char" char="." rowspan="1" colspan="1">0.965</td><td align="char" char="(" rowspan="1" colspan="1">0.981 (0.47–2.05)</td></tr><tr><td rowspan="1" colspan="1">other</td><td align="char" char="." rowspan="1" colspan="1">12</td><td align="char" char="." rowspan="1" colspan="1">6</td><td align="char" char="." rowspan="1" colspan="1">6</td><td align="char" char="." rowspan="1" colspan="1">18.50</td><td align="char" char="." rowspan="1" colspan="1">44.25</td><td align="char" char="." rowspan="1" colspan="1">0.522</td><td align="char" char="(" rowspan="1" colspan="1">1.31 (0.57–3.02)</td></tr></tbody></table></alternatives><table-wrap-foot><fn id="table-fn7-0300060519862469"><p>OS, overall survival; CI, confidence interval; <sup>¶</sup>Log rank test (pairwise over strata) with overall P value of 0.026</p></fn></table-wrap-foot></table-wrap><p>The median OS for patients receiving TCAs, SSRIs, and other antidepressants was 3.17 months (<italic>P</italic> = 0.002), 31.33 months, and 18.50 months, respectively. The Cox model showed that the impact of SSRIs (HR 0.98 [95% CI 0.47–2.05]) and other antidepressant drugs (HR 1.308 [95% CI 0.57–3.02]) had no difference on survival compared with not taking antidepressants at all. TCAs were associated with an increased risk of death, but the small sample size (n = 3) and very wide confidence interval (HR 6.72, 95% CI 1.59–28.48) argued against this (<xref rid="table6-0300060519862469" ref-type="table">Table 6</xref>).</p></sec></sec><sec sec-type="discussion" id="sec8-0300060519862469"><title>Discussion</title><p>Trends in alternative indications for Food and Drug Administration (FDA)-approved drugs have been the focus of numerous studies.<sup><xref rid="bibr12-0300060519862469" ref-type="bibr">12</xref>,<xref rid="bibr16-0300060519862469" ref-type="bibr">16</xref>,<xref rid="bibr20-0300060519862469" ref-type="bibr">20</xref>,<xref rid="bibr21-0300060519862469" ref-type="bibr">21</xref></sup> Recent technological advancements have helped establish novel relationships between many agents and unconventional diseases. For example, FDA-approved medications such as TCAs, SSRIs, and other antidepressants were shown to have possible anticancer effects on advanced lung cancers. In 2013, Jahchan et al. used <italic>in silico</italic> analysis to identify the TCA imipramine as a possible treatment for SCLC and other neuroendocrine tumors.<sup><xref rid="bibr10-0300060519862469" ref-type="bibr">10</xref></sup> Experimentally, they established a relationship between imipramine and the induction of apoptosis in both chemo-naïve and chemo-resistant SCLC cell lines. Similar outcomes were obtained in mouse models and xenografts. However, the same results were not obtained in either human or mouse NSCLC cell line cultures. Moreover, these results were not supported by clinical data because they failed to obtain a significant number of patients who received TCA during their cancer treatment by retrospective analysis of Stanford medical records.<sup><xref rid="bibr10-0300060519862469" ref-type="bibr">10</xref></sup> In 2017, assessment of the survival association between lung cancer patients and antidepressants found that those who received TCAs had improved survival compared with patients receiving other antidepressants, even with dose adjustments.<sup><xref rid="bibr12-0300060519862469" ref-type="bibr">12</xref></sup></p><p>A study by Amit et al. suggested that SSRIs possess anti-cancerous properties <italic>in vitro</italic> by exposing malignant T cells to sertraline and paroxetine, resulting in the inhibition of cell proliferation and induction of apoptosis; additionally, sertraline enhances the effects of vincristine and doxorubicin.<sup><xref rid="bibr3-0300060519862469" ref-type="bibr">3</xref></sup> These findings can be explained by the results reported by Gil-Ad et al. who found that paroxetine and sertraline are more effective agents in inhibiting cell viability and proliferation <italic>in vitro</italic> than other cytotoxic agents including vincristine and doxorubicin.<sup><xref rid="bibr19-0300060519862469" ref-type="bibr">19</xref>,<xref rid="bibr22-0300060519862469" ref-type="bibr">22</xref></sup> Their work also revealed possible mechanisms for cancer cell apoptosis, although these were not supported by clinical evidence. In another study of the associated risk of lung cancer with long-term antidepressant use, SSRIs were shown to have a protective effect while a slightly increased risk of lung cancer was observed for TCAs.</p><p>Other antidepressants such as duloxetine, trazodone, and mirtazapine also showed a trend towards improved OS, with 805 days compared with 531 in the control group.<sup><xref rid="bibr23-0300060519862469" ref-type="bibr">23</xref></sup> However, no specific trials or reviews have analyzed the potential antineoplastic effects of these agents.</p><p>Recent trends in studying alternative indications for FDA-approved drugs have been the focus of numerous studies,<sup><xref rid="bibr16-0300060519862469" ref-type="bibr">16</xref>,<xref rid="bibr20-0300060519862469" ref-type="bibr">20</xref>,<xref rid="bibr21-0300060519862469" ref-type="bibr">21</xref></sup> and new technological advancements have enabled novel relationships between agents and unconventional diseases to be established. Such indications involving TCAs, SSRIs, and other antidepressants were shown to have possible anticancer effects on advanced lung cancers.</p><p>In the present study, we investigated anti-tumor effects that might be attributed to the use of anti-depressants in NSCLC patients; however, we found no clear benefits in this subset of patients. We observed a median OS of 3.17 months among TCA patients, which was inferior to all other groups. We also found that TCA use was associated with a higher risk of death, although this finding was based on a very small population (n = 3). In 2013, Jahchan et al. used <italic>in silico</italic> analysis to investigate the TCA imipramine as a possible treatment for SCLC and other neuroendocrine tumors.<sup><xref rid="bibr10-0300060519862469" ref-type="bibr">10</xref></sup> Experimentally, they established a relationship between imipramine and the induction of apoptosis in both chemo-naïve and chemo-resistant SCLC cell lines. Similar outcomes were obtained in mouse models and xenografts. However, they did not obtain the same results in either human or mouse NSCLC cell line cultures. Additionally, these results were not supported by clinical data because they failed to identify a significant number of patients treated with TCA by retrospective analysis of Stanford Medical records (fewer than five cases, none of whom received long-term drug treatment).<sup><xref rid="bibr10-0300060519862469" ref-type="bibr">10</xref></sup></p><p>Numerous studies have reported improved survival with anti-depressant use. In 2017, the survival association between lung cancer patients and antidepressants was examined.<sup><xref rid="bibr7-0300060519862469" ref-type="bibr">7</xref></sup> Patients who received TCAs 3 months prior to cancer diagnosis showed improved survival compared with those receiving other antidepressants, and this association was still observed with dose adjustments. Another study observed the inhibition of proliferation and induction of apoptosis in malignant T cells following exposure to sertraline and paroxetine, in addition to sertraline-enhanced vincristine and doxorubicin effects, suggesting that SSRIs possess anti-cancerous properties <italic>in vitro</italic>.<sup><xref rid="bibr3-0300060519862469" ref-type="bibr">3</xref></sup> These findings can be explained by the results reported by Gil-Ad et al. who found that paroxetine and sertraline are more effective at inhibiting cell viability and proliferation <italic>in vitro</italic> compared with other cytotoxic agents such as vincristine and doxorubicin (Gariboldi et al., 2003).<sup><xref rid="bibr22-0300060519862469" ref-type="bibr">22</xref>,<xref rid="bibr23-0300060519862469" ref-type="bibr">23</xref></sup> Their work also suggested possible mechanisms for cancer cell apoptosis, but these were not supported by clinical evidence. Another study of the associated risk of lung cancer with long term use of SSRIs and TCAs documented a protective effect for SSRIs and a slightly increased risk with TCAs.<sup><xref rid="bibr24-0300060519862469" ref-type="bibr">24</xref></sup></p><p>Other antidepressants such as duloxetine, trazodone, and mirtazapine also showed a trend towards improved OS.<sup><xref rid="bibr25-0300060519862469" ref-type="bibr">25</xref></sup> However, no specific trials or reviews have analyzed the potential antineoplastic effects of these agents. This is of particular concern because it means that clinical prescription of anti-depressants for anti-neoplastic purposes in cancer patients will be based on a subjective opinion. Despite the numerous reports that support the existence of a benefit from anti-depressants in cancer patients, our results suggest otherwise. We recommend that because depression is such a common co-morbidity in cancer, special attention should be paid to the anti-tumor effects of anti-depressants in larger population studies.</p></sec><sec sec-type="conclusions" id="sec9-0300060519862469"><title>Conclusion</title><p>Most previously reported studies used <italic>in silico</italic> analysis to identify FDA-approved drugs that could be used to treat cancer, then experimentally tested these findings. Preclinical models found that TCAs and SSRIs have apoptotic effects on cancer cells, with TCAs having an advantage in inducing apoptosis in SCLC cells. Our study did not reveal any significantly positive impact of antidepressants on the OS of this cohort of patients. However, we found that the impact of the chemotherapy regimen combined with antidepressants was superior to no antidepressants. None of these findings demonstrated statistical significance, which may be attributed to the small sample size and the fact that the non-antidepressant arm represented more than 50% of our sample. Therefore, future studies with a larger population using propensity scoring or randomized controlled trials will help explore the effect of these non-chemotherapy drugs on OS in advanced lung cancer.</p></sec></body><back><ack><title>Acknowledgement</title><p>We would like to thank our colleague Ola Gaber who helped with the submission process.</p></ack><sec id="sec11-0300060519862469"><title>Declaration of conflicting interest</title><p>The authors declare that there is no conflict of interest.</p></sec><sec id="sec10-0300060519862469"><title>Ethics and consent</title><p>During the process of data collection, all patients’ data were properly anonymized and written informed consent was obtained at the time of original data collection.</p></sec><sec id="sec12-0300060519862469"><title>Funding</title><p>This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.</p></sec><ref-list content-type="numbered"><title>References</title><ref id="bibr1-0300060519862469"><label>1</label><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Mao</surname><given-names>X</given-names></name><name><surname>Hou</surname><given-names>T</given-names></name><name><surname>Cao</surname><given-names>B</given-names></name></person-group>, <etal>et al</etal><article-title>The tricyclic antidepressant amitriptyline inhibits D-cyclin transactivation and induces myeloma cell apoptosis by inhibiting histone deacetylases: in vitro and in silico evidence.</article-title><source>Mol Pharmacol</source><year>2011</year>;
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