Unique k-mers as Strain-Specific Barcodes for Phylogenetic Analysis and Natural Microbiome Profiling
Identifieur interne : 000D71 ( Pmc/Curation ); précédent : 000D70; suivant : 000D72Unique k-mers as Strain-Specific Barcodes for Phylogenetic Analysis and Natural Microbiome Profiling
Auteurs : Valery V. Panyukov ; Sergey S. Kiselev [Russie] ; Olga N. Ozoline [Russie]Source :
- International Journal of Molecular Sciences [ 1422-0067 ] ; 2020.
Abstract
The need for a comparative analysis of natural metagenomes stimulated the development of new methods for their taxonomic profiling. Alignment-free approaches based on the search for marker
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DOI: 10.3390/ijms21030944
PubMed: 32023871
PubMed Central: 7037511
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Unique <italic>k</italic>-mers as Strain-Specific Barcodes for Phylogenetic Analysis and Natural Microbiome Profiling</title><author><name sortKey="Panyukov, Valery V" sort="Panyukov, Valery V" uniqKey="Panyukov V" first="Valery V." last="Panyukov">Valery V. Panyukov</name><affiliation><nlm:aff id="af1-ijms-21-00944">Institute of Mathematical Problems of Biology RAS—the Branch of Keldysh Institute of Applied Mathematics of Russian Academy of Sciences, 142290 Pushchino, Russia;<email>panyukov@itaec.ru</email></nlm:aff></affiliation><affiliation><nlm:aff id="af2-ijms-21-00944">Structural and Functional Genomics Group, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, 142290 Pushchino, Russia;<email>anthyllium@gmail.com</email></nlm:aff></affiliation></author><author><name sortKey="Kiselev, Sergey S" sort="Kiselev, Sergey S" uniqKey="Kiselev S" first="Sergey S." last="Kiselev">Sergey S. Kiselev</name><affiliation><nlm:aff id="af2-ijms-21-00944">Structural and Functional Genomics Group, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, 142290 Pushchino, Russia;<email>anthyllium@gmail.com</email></nlm:aff></affiliation><affiliation wicri:level="1"><nlm:aff id="af3-ijms-21-00944">Institute of Cell Biophysics of the Russian Academy of Sciences, 142290 Pushchino, Russia</nlm:aff><country xml:lang="fr">Russie</country><wicri:regionArea>Institute of Cell Biophysics of the Russian Academy of Sciences, 142290 Pushchino</wicri:regionArea></affiliation></author><author><name sortKey="Ozoline, Olga N" sort="Ozoline, Olga N" uniqKey="Ozoline O" first="Olga N." last="Ozoline">Olga N. Ozoline</name><affiliation><nlm:aff id="af2-ijms-21-00944">Structural and Functional Genomics Group, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, 142290 Pushchino, Russia;<email>anthyllium@gmail.com</email></nlm:aff></affiliation><affiliation wicri:level="1"><nlm:aff id="af3-ijms-21-00944">Institute of Cell Biophysics of the Russian Academy of Sciences, 142290 Pushchino, Russia</nlm:aff><country xml:lang="fr">Russie</country><wicri:regionArea>Institute of Cell Biophysics of the Russian Academy of Sciences, 142290 Pushchino</wicri:regionArea></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">32023871</idno><idno type="pmc">7037511</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7037511</idno><idno type="RBID">PMC:7037511</idno><idno type="doi">10.3390/ijms21030944</idno><date when="2020">2020</date><idno type="wicri:Area/Pmc/Corpus">000D71</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000D71</idno><idno type="wicri:Area/Pmc/Curation">000D71</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">000D71</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Unique <italic>k</italic>-mers as Strain-Specific Barcodes for Phylogenetic Analysis and Natural Microbiome Profiling</title><author><name sortKey="Panyukov, Valery V" sort="Panyukov, Valery V" uniqKey="Panyukov V" first="Valery V." last="Panyukov">Valery V. Panyukov</name><affiliation><nlm:aff id="af1-ijms-21-00944">Institute of Mathematical Problems of Biology RAS—the Branch of Keldysh Institute of Applied Mathematics of Russian Academy of Sciences, 142290 Pushchino, Russia;<email>panyukov@itaec.ru</email></nlm:aff></affiliation><affiliation><nlm:aff id="af2-ijms-21-00944">Structural and Functional Genomics Group, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, 142290 Pushchino, Russia;<email>anthyllium@gmail.com</email></nlm:aff></affiliation></author><author><name sortKey="Kiselev, Sergey S" sort="Kiselev, Sergey S" uniqKey="Kiselev S" first="Sergey S." last="Kiselev">Sergey S. Kiselev</name><affiliation><nlm:aff id="af2-ijms-21-00944">Structural and Functional Genomics Group, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, 142290 Pushchino, Russia;<email>anthyllium@gmail.com</email></nlm:aff></affiliation><affiliation wicri:level="1"><nlm:aff id="af3-ijms-21-00944">Institute of Cell Biophysics of the Russian Academy of Sciences, 142290 Pushchino, Russia</nlm:aff><country xml:lang="fr">Russie</country><wicri:regionArea>Institute of Cell Biophysics of the Russian Academy of Sciences, 142290 Pushchino</wicri:regionArea></affiliation></author><author><name sortKey="Ozoline, Olga N" sort="Ozoline, Olga N" uniqKey="Ozoline O" first="Olga N." last="Ozoline">Olga N. Ozoline</name><affiliation><nlm:aff id="af2-ijms-21-00944">Structural and Functional Genomics Group, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, 142290 Pushchino, Russia;<email>anthyllium@gmail.com</email></nlm:aff></affiliation><affiliation wicri:level="1"><nlm:aff id="af3-ijms-21-00944">Institute of Cell Biophysics of the Russian Academy of Sciences, 142290 Pushchino, Russia</nlm:aff><country xml:lang="fr">Russie</country><wicri:regionArea>Institute of Cell Biophysics of the Russian Academy of Sciences, 142290 Pushchino</wicri:regionArea></affiliation></author></analytic><series><title level="j">International Journal of Molecular Sciences</title><idno type="eISSN">1422-0067</idno><imprint><date when="2020">2020</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>The need for a comparative analysis of natural metagenomes stimulated the development of new methods for their taxonomic profiling. Alignment-free approaches based on the search for marker <italic>k</italic>-mers turned out to be capable of identifying not only species, but also strains of microorganisms with known genomes. Here, we evaluated the ability of genus-specific <italic>k</italic>-mers to distinguish eight phylogroups of <italic>Escherichia coli</italic> (A, B1, C, E, D, F, G, B2) and assessed the presence of their unique 22-mers in clinical samples from microbiomes of four healthy people and four patients with Crohn’s disease. We found that a phylogenetic tree inferred from the pairwise distance matrix for unique 18-mers and 22-mers of 124 genomes was fully consistent with the topology of the tree, obtained with concatenated aligned sequences of orthologous genes. Therefore, we propose strain-specific “barcodes” for rapid phylotyping. Using unique 22-mers for taxonomic analysis, we detected microbes of all groups in human microbiomes; however, their presence in the five samples was significantly different. Pointing to the intraspecies heterogeneity of <italic>E. coli</italic> in the natural microflora, this also indicates the feasibility of further studies of the role of this heterogeneity in maintaining population homeostasis.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Woese, C R" uniqKey="Woese C">C.R. Woese</name></author><author><name sortKey="Fox, G E" uniqKey="Fox G">G.E. Fox</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Wang, Q" uniqKey="Wang Q">Q. Wang</name></author><author><name sortKey="Garrity, G M" uniqKey="Garrity G">G.M. Garrity</name></author><author><name sortKey="Tiedje, J M" uniqKey="Tiedje J">J.M. Tiedje</name></author><author><name sortKey="Cole, J R" uniqKey="Cole J">J.R. 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<front><journal-meta><journal-id journal-id-type="nlm-ta">Int J Mol Sci</journal-id><journal-id journal-id-type="iso-abbrev">Int J Mol Sci</journal-id><journal-id journal-id-type="publisher-id">ijms</journal-id><journal-title-group><journal-title>International Journal of Molecular Sciences</journal-title></journal-title-group><issn pub-type="epub">1422-0067</issn><publisher><publisher-name>MDPI</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">32023871</article-id><article-id pub-id-type="pmc">7037511</article-id><article-id pub-id-type="doi">10.3390/ijms21030944</article-id><article-id pub-id-type="publisher-id">ijms-21-00944</article-id><article-categories><subj-group subj-group-type="heading"><subject>Article</subject></subj-group></article-categories><title-group><article-title>Unique <italic>k</italic>-mers as Strain-Specific Barcodes for Phylogenetic Analysis and Natural Microbiome Profiling</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Panyukov</surname><given-names>Valery V.</given-names></name><xref ref-type="aff" rid="af1-ijms-21-00944">1</xref><xref ref-type="aff" rid="af2-ijms-21-00944">2</xref></contrib><contrib contrib-type="author"><name><surname>Kiselev</surname><given-names>Sergey S.</given-names></name><xref ref-type="aff" rid="af2-ijms-21-00944">2</xref><xref ref-type="aff" rid="af3-ijms-21-00944">3</xref></contrib><contrib contrib-type="author"><name><surname>Ozoline</surname><given-names>Olga N.</given-names></name><xref ref-type="aff" rid="af2-ijms-21-00944">2</xref><xref ref-type="aff" rid="af3-ijms-21-00944">3</xref><xref rid="c1-ijms-21-00944" ref-type="corresp">*</xref></contrib></contrib-group><aff id="af1-ijms-21-00944"><label>1</label>Institute of Mathematical Problems of Biology RAS—the Branch of Keldysh Institute of Applied Mathematics of Russian Academy of Sciences, 142290 Pushchino, Russia;<email>panyukov@itaec.ru</email></aff><aff id="af2-ijms-21-00944"><label>2</label>Structural and Functional Genomics Group, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, 142290 Pushchino, Russia;<email>anthyllium@gmail.com</email></aff><aff id="af3-ijms-21-00944"><label>3</label>Institute of Cell Biophysics of the Russian Academy of Sciences, 142290 Pushchino, Russia</aff><author-notes><corresp id="c1-ijms-21-00944"><label>*</label>Correspondence: <email>ozoline@rambler.ru</email></corresp></author-notes><pub-date pub-type="epub"><day>31</day><month>1</month><year>2020</year></pub-date><pub-date pub-type="collection"><month>2</month><year>2020</year></pub-date><volume>21</volume><issue>3</issue><elocation-id>944</elocation-id><history><date date-type="received"><day>29</day><month>11</month><year>2019</year></date><date date-type="accepted"><day>28</day><month>1</month><year>2020</year></date></history><permissions><copyright-statement>© 2020 by the authors.</copyright-statement><copyright-year>2020</copyright-year><license license-type="open-access"><license-p>Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/4.0/">http://creativecommons.org/licenses/by/4.0/</ext-link>).</license-p></license></permissions><abstract><p>The need for a comparative analysis of natural metagenomes stimulated the development of new methods for their taxonomic profiling. Alignment-free approaches based on the search for marker <italic>k</italic>-mers turned out to be capable of identifying not only species, but also strains of microorganisms with known genomes. Here, we evaluated the ability of genus-specific <italic>k</italic>-mers to distinguish eight phylogroups of <italic>Escherichia coli</italic> (A, B1, C, E, D, F, G, B2) and assessed the presence of their unique 22-mers in clinical samples from microbiomes of four healthy people and four patients with Crohn’s disease. We found that a phylogenetic tree inferred from the pairwise distance matrix for unique 18-mers and 22-mers of 124 genomes was fully consistent with the topology of the tree, obtained with concatenated aligned sequences of orthologous genes. Therefore, we propose strain-specific “barcodes” for rapid phylotyping. Using unique 22-mers for taxonomic analysis, we detected microbes of all groups in human microbiomes; however, their presence in the five samples was significantly different. Pointing to the intraspecies heterogeneity of <italic>E. coli</italic> in the natural microflora, this also indicates the feasibility of further studies of the role of this heterogeneity in maintaining population homeostasis.</p></abstract><kwd-group><kwd>bacterial genomes</kwd><kwd>genome barcodes</kwd><kwd><italic>k</italic>-mers</kwd><kwd>alignment-free algorithms</kwd><kwd>phylogenetic trees</kwd><kwd>metagenomes</kwd><kwd>taxonomic profiling</kwd><kwd>phylotyping</kwd><kwd>human microbiome</kwd></kwd-group></article-meta></front><floats-group><fig id="ijms-21-00944-f001" orientation="portrait" position="float"><label>Figure 1</label><caption><p>The size of the “unique genomes” represented by <italic>k</italic>-mers of different length for eight individual <italic>E. coli</italic> chromosomes, and the degree of their intersection exemplified by three indicated genomes. (<bold>a</bold>) The solid lines show the normalized per 1 Mbp in each genome number of <italic>k</italic>-mers (N), found in the chromosomes of <italic>E. coli</italic> (strains: K-12 MG1655, ETEC H10407, O26:H11 str. 11368, ABU 83972, APEC O78, str. 042, O157:H7 str. EC4115 and O7:K1 str. CE10) that are absent in the nucleotide sequences of the reference database. Dashed lines show the increment curves plotted for ΔN/Δ<italic>k</italic>. (<bold>b</bold>) Venn diagram illustrating the intersection between the sets of 18-mers identified in the genomes of two bacteria from group A (<italic>E. coli</italic> K-12 MG1655 and ETEC H10407) and the <italic>E. coli</italic> O26:H11 str. 11368, belonging to group B1. The number of unique 18-mers in each genome, the size of their common set and the intersection between the two sets of group A are indicated without normalization. The diagram was created using a Venn Diagram Maker [<xref rid="B54-ijms-21-00944" ref-type="bibr">54</xref>].</p></caption><graphic xlink:href="ijms-21-00944-g001"></graphic></fig><fig id="ijms-21-00944-f002" orientation="portrait" position="float"><label>Figure 2</label><caption><p>Phylogenetic tree for 124 <italic>E. coli</italic> strains inferred from concatenated aligned sequences of 27 genes in the IQ-TREE program [<xref rid="B70-ijms-21-00944" ref-type="bibr">70</xref>] using the maximum likelihood method. The optimal model for nucleotide substitution was GTR+G+I (the general time-reversible model assuming a fixed portion of invariant sites and evolutionary rate differences described by the gamma-distribution). The branch support level shown in percentage was estimated based on 2000 iterations with ultrafast bootstrap approximation [<xref rid="B71-ijms-21-00944" ref-type="bibr">71</xref>]. The scale bar corresponds to the number of nucleotide substitutions per site. The color code corresponds to eight indicated phylogroups. The names of all strains are indicated near corresponding branches and separated with comma for identical sequences in group B1.</p></caption><graphic xlink:href="ijms-21-00944-g002"></graphic></fig><fig id="ijms-21-00944-f003" orientation="portrait" position="float"><label>Figure 3</label><caption><p>Phylogenetic tree constructed by the neighbor-joining method in the MEGA X program [<xref rid="B73-ijms-21-00944" ref-type="bibr">73</xref>]. The tree was inferred from the pairwise distance matrix for 124 sets of 18-mers unique to the genera <italic>Escherichia/Shigella</italic> and was identical to the tree constructed on the basis of 22-mers. The set of marker 18-mers from the genome of <italic>Escherichia albertii</italic> KF1 was used as the outgroup sample. The scale bar shows the Sorensen distance as a percentage. The same color code as in <xref ref-type="fig" rid="ijms-21-00944-f002">Figure 2</xref> denotes the clades of eight phylogroups.</p></caption><graphic xlink:href="ijms-21-00944-g003"></graphic></fig><fig id="ijms-21-00944-f004" orientation="portrait" position="float"><label>Figure 4</label><caption><p>Phylogroup-dependent taxonomy of metagenomes from four healthy individuals (numbers 1–4) and four patients with Crohn’s disease (numbers 5–8). Panel (<bold>a</bold>) shows the size distribution for cumulative sets of unique 22-mers (colored symbols) and selected metagenomes numbered in the same way as in panel “<bold>b</bold>” (open symbols). Panel (<bold>b</bold>) demonstrates the number of sequence reads assigned to a particular group, normalized by the size of cumulative sets of 22-mers (<xref rid="ijms-21-00944-t001" ref-type="table">Table 1</xref>) and the number of reads in metagenomes. Numerical values in both cases are presented as their natural logarithms.</p></caption><graphic xlink:href="ijms-21-00944-g004"></graphic></fig><table-wrap id="ijms-21-00944-t001" orientation="portrait" position="float"><object-id pub-id-type="pii">ijms-21-00944-t001_Table 1</object-id><label>Table 1</label><caption><p>Statistics for phylogroup-specific sets of 22-mers for 124 genomes of <italic>E. coli</italic>.</p></caption><table frame="hsides" rules="groups"><thead><tr><th rowspan="2" align="center" valign="middle" style="border-top:solid thin;border-bottom:solid thin" colspan="1">Phylogroup</th><th rowspan="2" align="center" valign="middle" style="border-top:solid thin;border-bottom:solid thin" colspan="1">Number of Strains</th><th colspan="2" align="center" valign="middle" style="border-top:solid thin;border-bottom:solid thin" rowspan="1">Range in Size Variation for Sets of Marker 22-mers in Individual Genomes</th><th rowspan="2" align="center" valign="middle" style="border-top:solid thin;border-bottom:solid thin" colspan="1">Size of Core Sets </th><th rowspan="2" align="center" valign="middle" style="border-top:solid thin;border-bottom:solid thin" colspan="1">Size of Cumulative Sets</th></tr><tr><th align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">Maximal</th><th align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">Minimal</th></tr></thead><tbody><tr><td align="center" valign="middle" rowspan="1" colspan="1">A</td><td align="center" valign="middle" rowspan="1" colspan="1">17</td><td align="center" valign="middle" rowspan="1" colspan="1">143,024</td><td align="center" valign="middle" rowspan="1" colspan="1">24,726</td><td align="center" valign="middle" rowspan="1" colspan="1">232</td><td align="center" valign="middle" rowspan="1" colspan="1">1,055,426</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">B1</td><td align="center" valign="middle" rowspan="1" colspan="1">25</td><td align="center" valign="middle" rowspan="1" colspan="1">161,117</td><td align="center" valign="middle" rowspan="1" colspan="1">72,365</td><td align="center" valign="middle" rowspan="1" colspan="1">143</td><td align="center" valign="middle" rowspan="1" colspan="1">1,600,260</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">B2</td><td align="center" valign="middle" rowspan="1" colspan="1">23</td><td align="center" valign="middle" rowspan="1" colspan="1">515,073</td><td align="center" valign="middle" rowspan="1" colspan="1">379,072</td><td align="center" valign="middle" rowspan="1" colspan="1">29,343</td><td align="center" valign="middle" rowspan="1" colspan="1">2,539,510</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">C</td><td align="center" valign="middle" rowspan="1" colspan="1">14</td><td align="center" valign="middle" rowspan="1" colspan="1">148,829</td><td align="center" valign="middle" rowspan="1" colspan="1">56,030</td><td align="center" valign="middle" rowspan="1" colspan="1">8444</td><td align="center" valign="middle" rowspan="1" colspan="1">586,272</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">D</td><td align="center" valign="middle" rowspan="1" colspan="1">11</td><td align="center" valign="middle" rowspan="1" colspan="1">368,049</td><td align="center" valign="middle" rowspan="1" colspan="1">243,470</td><td align="center" valign="middle" rowspan="1" colspan="1">1298</td><td align="center" valign="middle" rowspan="1" colspan="1">1,778,210</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">E</td><td align="center" valign="middle" rowspan="1" colspan="1">13</td><td align="center" valign="middle" rowspan="1" colspan="1">463,307</td><td align="center" valign="middle" rowspan="1" colspan="1">292,542</td><td align="center" valign="middle" rowspan="1" colspan="1">10,213</td><td align="center" valign="middle" rowspan="1" colspan="1">1,582,445</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">F</td><td align="center" valign="middle" rowspan="1" colspan="1">11</td><td align="center" valign="middle" rowspan="1" colspan="1">355,845</td><td align="center" valign="middle" rowspan="1" colspan="1">248,277</td><td align="center" valign="middle" rowspan="1" colspan="1">20,640</td><td align="center" valign="middle" rowspan="1" colspan="1">1,159,521</td></tr><tr><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">G</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">10</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">235,711</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">146,632</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">51,125</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">599,863</td></tr></tbody></table></table-wrap><table-wrap id="ijms-21-00944-t002" orientation="portrait" position="float"><object-id pub-id-type="pii">ijms-21-00944-t002_Table 2</object-id><label>Table 2</label><caption><p>Number of <italic>E. coli</italic> group-specific 22-mers, found in selected metagenomes.</p></caption><table frame="hsides" rules="groups"><thead><tr><th align="center" valign="middle" style="border-top:solid thin;border-bottom:solid thin" rowspan="1" colspan="1">SRA ID of Metagenome (N)</th><th align="center" valign="middle" style="border-top:solid thin;border-bottom:solid thin" rowspan="1" colspan="1">A</th><th align="center" valign="middle" style="border-top:solid thin;border-bottom:solid thin" rowspan="1" colspan="1">B1</th><th align="center" valign="middle" style="border-top:solid thin;border-bottom:solid thin" rowspan="1" colspan="1">B2</th><th align="center" valign="middle" style="border-top:solid thin;border-bottom:solid thin" rowspan="1" colspan="1">C</th><th align="center" valign="middle" style="border-top:solid thin;border-bottom:solid thin" rowspan="1" colspan="1">D</th><th align="center" valign="middle" style="border-top:solid thin;border-bottom:solid thin" rowspan="1" colspan="1">E</th><th align="center" valign="middle" style="border-top:solid thin;border-bottom:solid thin" rowspan="1" colspan="1">F</th><th align="center" valign="middle" style="border-top:solid thin;border-bottom:solid thin" rowspan="1" colspan="1">G</th></tr></thead><tbody><tr><td colspan="9" align="center" valign="middle" style="border-bottom:solid thin" rowspan="1"><bold>Samples of healthy individuals</bold></td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">SRX187518 (1)</td><td align="center" valign="middle" rowspan="1" colspan="1">17</td><td align="center" valign="middle" rowspan="1" colspan="1">15</td><td align="center" valign="middle" rowspan="1" colspan="1">26</td><td align="center" valign="middle" rowspan="1" colspan="1">5</td><td align="center" valign="middle" rowspan="1" colspan="1">12</td><td align="center" valign="middle" rowspan="1" colspan="1">14</td><td align="center" valign="middle" rowspan="1" colspan="1">8</td><td align="center" valign="middle" rowspan="1" colspan="1">0</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">SRX187521 (2)</td><td align="center" valign="middle" rowspan="1" colspan="1">9382</td><td align="center" valign="middle" rowspan="1" colspan="1">223</td><td align="center" valign="middle" rowspan="1" colspan="1">5060</td><td align="center" valign="middle" rowspan="1" colspan="1">33</td><td align="center" valign="middle" rowspan="1" colspan="1">559</td><td align="center" valign="middle" rowspan="1" colspan="1">110</td><td align="center" valign="middle" rowspan="1" colspan="1">182</td><td align="center" valign="middle" rowspan="1" colspan="1">39</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">SRX187522 (3)</td><td align="center" valign="middle" rowspan="1" colspan="1">31</td><td align="center" valign="middle" rowspan="1" colspan="1">191</td><td align="center" valign="middle" rowspan="1" colspan="1">11,566</td><td align="center" valign="middle" rowspan="1" colspan="1">17</td><td align="center" valign="middle" rowspan="1" colspan="1">34</td><td align="center" valign="middle" rowspan="1" colspan="1">273</td><td align="center" valign="middle" rowspan="1" colspan="1">83</td><td align="center" valign="middle" rowspan="1" colspan="1">15</td></tr><tr><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">SRX187523 (4)</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">29</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">29</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">62</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">10</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">21</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">22</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">17</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">6</td></tr><tr><td colspan="9" align="center" valign="middle" style="border-bottom:solid thin" rowspan="1"><bold>Samples of Crohn’s Disease Patients</bold></td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">SRX187524 (5)</td><td align="center" valign="middle" rowspan="1" colspan="1">105</td><td align="center" valign="middle" rowspan="1" colspan="1">307</td><td align="center" valign="middle" rowspan="1" colspan="1">36,698</td><td align="center" valign="middle" rowspan="1" colspan="1">64</td><td align="center" valign="middle" rowspan="1" colspan="1">212</td><td align="center" valign="middle" rowspan="1" colspan="1">54</td><td align="center" valign="middle" rowspan="1" colspan="1">279</td><td align="center" valign="middle" rowspan="1" colspan="1">305</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">SRX187525 (6)</td><td align="center" valign="middle" rowspan="1" colspan="1">10</td><td align="center" valign="middle" rowspan="1" colspan="1">28</td><td align="center" valign="middle" rowspan="1" colspan="1">81</td><td align="center" valign="middle" rowspan="1" colspan="1">6</td><td align="center" valign="middle" rowspan="1" colspan="1">22</td><td align="center" valign="middle" rowspan="1" colspan="1">24</td><td align="center" valign="middle" rowspan="1" colspan="1">23</td><td align="center" valign="middle" rowspan="1" colspan="1">15</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">SRX187526 (7)</td><td align="center" valign="middle" rowspan="1" colspan="1">211</td><td align="center" valign="middle" rowspan="1" colspan="1">11388</td><td align="center" valign="middle" rowspan="1" colspan="1">38,389</td><td align="center" valign="middle" rowspan="1" colspan="1">3435</td><td align="center" valign="middle" rowspan="1" colspan="1">774</td><td align="center" valign="middle" rowspan="1" colspan="1">223</td><td align="center" valign="middle" rowspan="1" colspan="1">1147</td><td align="center" valign="middle" rowspan="1" colspan="1">420</td></tr><tr><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">SRX187527 (8)</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">944</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">4418</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">462,763</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">1292</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">1019</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">1104</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">1713</td><td align="center" valign="middle" style="border-bottom:solid thin" rowspan="1" colspan="1">2024</td></tr></tbody></table></table-wrap></floats-group></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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