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Leishmania infection activates host mTOR for its survival by M2 macrophage polarization.

Identifieur interne : 000561 ( Main/Exploration ); précédent : 000560; suivant : 000562

Leishmania infection activates host mTOR for its survival by M2 macrophage polarization.

Auteurs : Ajay Kumar [Inde] ; Sushmita Das [Inde] ; Abhishek Mandal [Inde] ; Sudha Verma [Inde] ; Kumar Abhishek [Inde] ; Ashish Kumar [Inde] ; Vinod Kumar [Inde] ; Ayan Kumar Ghosh [États-Unis] ; Pradeep Das [Inde]

Source :

RBID : pubmed:30187512

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English descriptors

Abstract

Mammalian target of rapamycin (mTOR) is a central regulator of growth and immunity of host cells. It's involvement in cancer and tuberculosis is well documented but least explored in Leishmania donovani invasion of host cells. Therefore, in the present study, we aimed to investigate the role of mTOR in M2 macrophage polarization for Leishmania survival. We observed that Leishmania infection activated host mTOR pathway characterized by phosphorylation of mTOR, 70S6K and 4-EBP1. Inhibition of mTOR resulted in decreased parasite load and percent infectivity. Moreover, Leishmania infection triggered cell proliferation as was evidenced by increased expression of cyclin A and p-RPS6. mTOR activation during Leishmania infection resulted in reduced expression of M1 macrophage markers (eg, ROS, NO, iNOS, NOX-1, IL-12, IL-1β and TNF-α), and increased expression of M2 macrophage markers (eg, arginase-1, IL-10, TGF-β, CD206 and CD163). Furthermore, we observed that in case of Leishmania infection, mTOR inhibition increased the translocation of NF-κB to nucleus and deactivation of STAT-3. Eventually, we observed that inhibition of M2 macrophage polarization reduced Leishmania survival inside macrophages. Therefore, our findings suggest that mTOR plays a crucial role in regulation of M2 macrophage polarization and direct the innate immune homeostasis towards parasite survival inside host.

DOI: 10.1111/pim.12586
PubMed: 30187512


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<term>Female (MeSH)</term>
<term>Humans (MeSH)</term>
<term>Interleukin-12 (genetics)</term>
<term>Interleukin-12 (immunology)</term>
<term>Interleukin-1beta (genetics)</term>
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<term>Macrophages</term>
<term>Sérine-thréonine kinases TOR</term>
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<term>Leishmaniasis</term>
<term>Macrophages</term>
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<div type="abstract" xml:lang="en">Mammalian target of rapamycin (mTOR) is a central regulator of growth and immunity of host cells. It's involvement in cancer and tuberculosis is well documented but least explored in Leishmania donovani invasion of host cells. Therefore, in the present study, we aimed to investigate the role of mTOR in M2 macrophage polarization for Leishmania survival. We observed that Leishmania infection activated host mTOR pathway characterized by phosphorylation of mTOR, 70S6K and 4-EBP1. Inhibition of mTOR resulted in decreased parasite load and percent infectivity. Moreover, Leishmania infection triggered cell proliferation as was evidenced by increased expression of cyclin A and p-RPS6. mTOR activation during Leishmania infection resulted in reduced expression of M1 macrophage markers (eg, ROS, NO, iNOS, NOX-1, IL-12, IL-1β and TNF-α), and increased expression of M2 macrophage markers (eg, arginase-1, IL-10, TGF-β, CD206 and CD163). Furthermore, we observed that in case of Leishmania infection, mTOR inhibition increased the translocation of NF-κB to nucleus and deactivation of STAT-3. Eventually, we observed that inhibition of M2 macrophage polarization reduced Leishmania survival inside macrophages. Therefore, our findings suggest that mTOR plays a crucial role in regulation of M2 macrophage polarization and direct the innate immune homeostasis towards parasite survival inside host.</div>
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<Affiliation>Department of Pediatrics, Johns Hopkins School of Medicine, Baltimore, Maryland.</Affiliation>
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<LastName>Das</LastName>
<ForeName>Pradeep</ForeName>
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<AffiliationInfo>
<Affiliation>Division of Molecular Biology, Rajendra Memorial Research Institute of Medical Sciences (Indian Council of Medical Research), Patna, Bihar, India.</Affiliation>
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</Author>
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<Language>eng</Language>
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<Agency>Indian Council of Medical Research</Agency>
<Country></Country>
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<Country>England</Country>
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<NameOfSubstance UI="D053583">Interleukin-1beta</NameOfSubstance>
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<RegistryNumber>EC 2.7.1.1</RegistryNumber>
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<DescriptorName UI="D002470" MajorTopicYN="N">Cell Survival</DescriptorName>
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<MeshHeading>
<DescriptorName UI="D005260" MajorTopicYN="N">Female</DescriptorName>
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<DescriptorName UI="D006801" MajorTopicYN="N">Humans</DescriptorName>
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<MeshHeading>
<DescriptorName UI="D018664" MajorTopicYN="N">Interleukin-12</DescriptorName>
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<MeshHeading>
<DescriptorName UI="D053583" MajorTopicYN="N">Interleukin-1beta</DescriptorName>
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<QualifierName UI="Q000276" MajorTopicYN="N">immunology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D007893" MajorTopicYN="N">Leishmania donovani</DescriptorName>
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<QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D007896" MajorTopicYN="N">Leishmaniasis</DescriptorName>
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</MeshHeading>
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<QualifierName UI="Q000276" MajorTopicYN="Y">immunology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D051379" MajorTopicYN="N">Mice</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D008807" MajorTopicYN="N">Mice, Inbred BALB C</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D016328" MajorTopicYN="N">NF-kappa B</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000276" MajorTopicYN="N">immunology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D015398" MajorTopicYN="N">Signal Transduction</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D058570" MajorTopicYN="N">TOR Serine-Threonine Kinases</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000276" MajorTopicYN="Y">immunology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D014409" MajorTopicYN="N">Tumor Necrosis Factor-alpha</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000276" MajorTopicYN="N">immunology</QualifierName>
</MeshHeading>
</MeshHeadingList>
<KeywordList Owner="NOTNLM">
<Keyword MajorTopicYN="N">Leishmania </Keyword>
<Keyword MajorTopicYN="N">M1 macrophage</Keyword>
<Keyword MajorTopicYN="N">M2 macrophage</Keyword>
<Keyword MajorTopicYN="N">mTOR</Keyword>
<Keyword MajorTopicYN="N">rapamycin</Keyword>
<Keyword MajorTopicYN="N">visceral leishmaniasis</Keyword>
</KeywordList>
</MedlineCitation>
<PubmedData>
<History>
<PubMedPubDate PubStatus="received">
<Year>2018</Year>
<Month>03</Month>
<Day>16</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="revised">
<Year>2018</Year>
<Month>07</Month>
<Day>26</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="accepted">
<Year>2018</Year>
<Month>09</Month>
<Day>02</Day>
</PubMedPubDate>
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<Year>2018</Year>
<Month>9</Month>
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<PubMedPubDate PubStatus="medline">
<Year>2019</Year>
<Month>8</Month>
<Day>17</Day>
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<PubMedPubDate PubStatus="entrez">
<Year>2018</Year>
<Month>9</Month>
<Day>7</Day>
<Hour>6</Hour>
<Minute>0</Minute>
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</History>
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<ArticleId IdType="pubmed">30187512</ArticleId>
<ArticleId IdType="doi">10.1111/pim.12586</ArticleId>
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<list>
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<li>Inde</li>
<li>États-Unis</li>
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<li>Maryland</li>
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<name sortKey="Kumar, Ajay" sort="Kumar, Ajay" uniqKey="Kumar A" first="Ajay" last="Kumar">Ajay Kumar</name>
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<name sortKey="Abhishek, Kumar" sort="Abhishek, Kumar" uniqKey="Abhishek K" first="Kumar" last="Abhishek">Kumar Abhishek</name>
<name sortKey="Das, Pradeep" sort="Das, Pradeep" uniqKey="Das P" first="Pradeep" last="Das">Pradeep Das</name>
<name sortKey="Das, Sushmita" sort="Das, Sushmita" uniqKey="Das S" first="Sushmita" last="Das">Sushmita Das</name>
<name sortKey="Kumar, Ashish" sort="Kumar, Ashish" uniqKey="Kumar A" first="Ashish" last="Kumar">Ashish Kumar</name>
<name sortKey="Kumar, Vinod" sort="Kumar, Vinod" uniqKey="Kumar V" first="Vinod" last="Kumar">Vinod Kumar</name>
<name sortKey="Mandal, Abhishek" sort="Mandal, Abhishek" uniqKey="Mandal A" first="Abhishek" last="Mandal">Abhishek Mandal</name>
<name sortKey="Verma, Sudha" sort="Verma, Sudha" uniqKey="Verma S" first="Sudha" last="Verma">Sudha Verma</name>
</country>
<country name="États-Unis">
<region name="Maryland">
<name sortKey="Ghosh, Ayan Kumar" sort="Ghosh, Ayan Kumar" uniqKey="Ghosh A" first="Ayan Kumar" last="Ghosh">Ayan Kumar Ghosh</name>
</region>
</country>
</tree>
</affiliations>
</record>

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