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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Regulation of parasite antigen-driven immune responses by interleukin-10 (IL-10) and IL-12 in lymphatic filariasis.</title>
<author><name sortKey="Mahanty, S" sort="Mahanty, S" uniqKey="Mahanty S" first="S" last="Mahanty">S. Mahanty</name>
</author>
<author><name sortKey="Ravichandran, M" sort="Ravichandran, M" uniqKey="Ravichandran M" first="M" last="Ravichandran">M. Ravichandran</name>
</author>
<author><name sortKey="Raman, U" sort="Raman, U" uniqKey="Raman U" first="U" last="Raman">U. Raman</name>
</author>
<author><name sortKey="Jayaraman, K" sort="Jayaraman, K" uniqKey="Jayaraman K" first="K" last="Jayaraman">K. Jayaraman</name>
</author>
<author><name sortKey="Kumaraswami, V" sort="Kumaraswami, V" uniqKey="Kumaraswami V" first="V" last="Kumaraswami">V. Kumaraswami</name>
</author>
<author><name sortKey="Nutman, T B" sort="Nutman, T B" uniqKey="Nutman T" first="T B" last="Nutman">T B Nutman</name>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">PMC</idno>
<idno type="pmid">9125556</idno>
<idno type="pmc">175209</idno>
<idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC175209</idno>
<idno type="RBID">PMC:175209</idno>
<date when="1997">1997</date>
<idno type="wicri:Area/Pmc/Corpus">001807</idno>
<idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">001807</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Regulation of parasite antigen-driven immune responses by interleukin-10 (IL-10) and IL-12 in lymphatic filariasis.</title>
<author><name sortKey="Mahanty, S" sort="Mahanty, S" uniqKey="Mahanty S" first="S" last="Mahanty">S. Mahanty</name>
</author>
<author><name sortKey="Ravichandran, M" sort="Ravichandran, M" uniqKey="Ravichandran M" first="M" last="Ravichandran">M. Ravichandran</name>
</author>
<author><name sortKey="Raman, U" sort="Raman, U" uniqKey="Raman U" first="U" last="Raman">U. Raman</name>
</author>
<author><name sortKey="Jayaraman, K" sort="Jayaraman, K" uniqKey="Jayaraman K" first="K" last="Jayaraman">K. Jayaraman</name>
</author>
<author><name sortKey="Kumaraswami, V" sort="Kumaraswami, V" uniqKey="Kumaraswami V" first="V" last="Kumaraswami">V. Kumaraswami</name>
</author>
<author><name sortKey="Nutman, T B" sort="Nutman, T B" uniqKey="Nutman T" first="T B" last="Nutman">T B Nutman</name>
</author>
</analytic>
<series><title level="j">Infection and Immunity</title>
<idno type="ISSN">0019-9567</idno>
<idno type="eISSN">1098-5522</idno>
<imprint><date when="1997">1997</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
</fileDesc>
<profileDesc><textClass></textClass>
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</teiHeader>
<front><div type="abstract" xml:lang="en"><p>We investigated the mechanisms by which interleukin-10 (IL-10) regulates antigen-specific hyporesponsiveness in asymptomatic microfilaremic (MF) individuals. Peripheral blood mononuclear cells from MF individuals (n = 11) were stimulated in vitro with Brugia malayi antigen (BMA) or mycobacterial purified protein derivative (PPD) in the presence of neutralizing anti-IL-10 or isotype control monoclonal antibodies. As expected, BMA stimulated little or no gamma interferon (IFN-gamma) secretion in MF individuals, whereas PPD stimulated IFN-gamma in all but one. Neutralization of endogenous BMA-driven IL-10 secretion led to augmentation of IFN-gamma in seven of nine MF individuals (1.5- to 10-fold) and did so in a BMA-specific manner (PPD-driven IFN-gamma was augmented in only two of eight MF individuals and only 1.5- to 2-fold), indicating that IL-10 downregulates type 1 responses in these individuals. Type 2 responses (IL-5 secretion) were unaffected by the IL-10 blockade. To assess whether IL-12 could reverse the type 1 downregulation observed, the effect of recombinant human IL-12 (rhIL-12) on BMA-driven IL-5 and IFN-gamma production was also evaluated. rhIL-12 augmented both BMA- and PPD-driven IFN-gamma production 5- to 10-fold in six of nine MF individuals. These data demonstrate that IL-10 downregulates BMA-driven type 1 responses and that IL-12 can overcome downregulation of Th1 responses associated with MF but does so in a non-antigen-specific manner.</p>
</div>
</front>
</TEI>
<pmc article-type="research-article"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Infect Immun</journal-id>
<journal-title>Infection and Immunity</journal-title>
<issn pub-type="ppub">0019-9567</issn>
<issn pub-type="epub">1098-5522</issn>
</journal-meta>
<article-meta><article-id pub-id-type="pmid">9125556</article-id>
<article-id pub-id-type="pmc">175209</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject>
</subj-group>
</article-categories>
<title-group><article-title>Regulation of parasite antigen-driven immune responses by interleukin-10 (IL-10) and IL-12 in lymphatic filariasis.</article-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>Mahanty</surname>
<given-names>S</given-names>
</name>
</contrib>
<contrib contrib-type="author"><name><surname>Ravichandran</surname>
<given-names>M</given-names>
</name>
</contrib>
<contrib contrib-type="author"><name><surname>Raman</surname>
<given-names>U</given-names>
</name>
</contrib>
<contrib contrib-type="author"><name><surname>Jayaraman</surname>
<given-names>K</given-names>
</name>
</contrib>
<contrib contrib-type="author"><name><surname>Kumaraswami</surname>
<given-names>V</given-names>
</name>
</contrib>
<contrib contrib-type="author"><name><surname>Nutman</surname>
<given-names>T B</given-names>
</name>
</contrib>
</contrib-group>
<aff>Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA.</aff>
<pub-date pub-type="ppub"><month>5</month>
<year>1997</year>
</pub-date>
<volume>65</volume>
<issue>5</issue>
<fpage>1742</fpage>
<lpage>1747</lpage>
<abstract><p>We investigated the mechanisms by which interleukin-10 (IL-10) regulates antigen-specific hyporesponsiveness in asymptomatic microfilaremic (MF) individuals. Peripheral blood mononuclear cells from MF individuals (n = 11) were stimulated in vitro with Brugia malayi antigen (BMA) or mycobacterial purified protein derivative (PPD) in the presence of neutralizing anti-IL-10 or isotype control monoclonal antibodies. As expected, BMA stimulated little or no gamma interferon (IFN-gamma) secretion in MF individuals, whereas PPD stimulated IFN-gamma in all but one. Neutralization of endogenous BMA-driven IL-10 secretion led to augmentation of IFN-gamma in seven of nine MF individuals (1.5- to 10-fold) and did so in a BMA-specific manner (PPD-driven IFN-gamma was augmented in only two of eight MF individuals and only 1.5- to 2-fold), indicating that IL-10 downregulates type 1 responses in these individuals. Type 2 responses (IL-5 secretion) were unaffected by the IL-10 blockade. To assess whether IL-12 could reverse the type 1 downregulation observed, the effect of recombinant human IL-12 (rhIL-12) on BMA-driven IL-5 and IFN-gamma production was also evaluated. rhIL-12 augmented both BMA- and PPD-driven IFN-gamma production 5- to 10-fold in six of nine MF individuals. These data demonstrate that IL-10 downregulates BMA-driven type 1 responses and that IL-12 can overcome downregulation of Th1 responses associated with MF but does so in a non-antigen-specific manner.</p>
</abstract>
</article-meta>
</front>
</pmc>
</record>
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