{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,20]],"date-time":"2026-09-20T10:27:15Z","timestamp":1789900035336,"version":"4.0.1"},"update-to":[{"DOI":"10.1371\/journal.pntd.0009999","type":"new_version","label":"New version","source":"publisher","updated":{"date-parts":[[2021,12,9]],"date-time":"2021-12-09T00:00:00Z","timestamp":1639008000000}}],"reference-count":71,"publisher":"Public Library of Science (PLoS)","issue":"11","license":[{"start":{"date-parts":[[2021,11,29]],"date-time":"2021-11-29T00:00:00Z","timestamp":1638144000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.plosntds.org"],"crossmark-restriction":false},"short-container-title":["PLoS Negl Trop Dis"],"abstract":"<jats:p>\n                    The neglected tropical disease onchocerciasis, or river blindness, is caused by infection with the filarial nematode\n                    <jats:italic>Onchocerca volvulus<\/jats:italic>\n                    . Current estimates indicate that 17 million people are infected worldwide, the majority of them living in Africa. Today there are no non-invasive tests available that can detect ongoing infection, and that can be used for effective monitoring of elimination programs. In addition, to enable pharmacodynamic studies with novel macrofilaricide drug candidates, surrogate endpoints and efficacy biomarkers are needed but are non-existent. We describe the use of a multimodal untargeted mass spectrometry-based approach (metabolomics and lipidomics) to identify onchocerciasis-associated metabolites in urine and plasma, and of specific lipid features in plasma of infected individuals (\n                    <jats:italic>O<\/jats:italic>\n                    .\n                    <jats:italic>volvulus<\/jats:italic>\n                    infected cases: 68 individuals with palpable nodules; lymphatic filariasis cases: 8 individuals; non-endemic controls: 20 individuals). This work resulted in the identification of elevated concentrations of the plasma metabolites inosine and hypoxanthine as biomarkers for filarial infection, and of the urine metabolite\n                    <jats:italic>cis<\/jats:italic>\n                    -cinnamoylglycine (CCG) as biomarker for\n                    <jats:italic>O<\/jats:italic>\n                    .\n                    <jats:italic>volvulus<\/jats:italic>\n                    . During the targeted validation study, metabolite-specific cutoffs were determined (inosine: 34.2 ng\/ml; hypoxanthine: 1380 ng\/ml; CCG: 29.7 ng\/ml) and sensitivity and specificity profiles were established. Subsequent evaluation of these biomarkers in a non-endemic population from a different geographical region invalidated the urine metabolite CCG as biomarker for\n                    <jats:italic>O<\/jats:italic>\n                    .\n                    <jats:italic>volvulus<\/jats:italic>\n                    . The plasma metabolites inosine and hypoxanthine were confirmed as biomarkers for filarial infection. With the availability of targeted LC-MS procedures, the full potential of these 2 biomarkers in macrofilaricide clinical trials, MDA efficacy surveys, and epidemiological transmission studies can be investigated.\n                  <\/jats:p>","DOI":"10.1371\/journal.pntd.0009999","type":"journal-article","created":{"date-parts":[[2021,11,29]],"date-time":"2021-11-29T13:59:18Z","timestamp":1638194358000},"page":"e0009999","update-policy":"https:\/\/doi.org\/10.1371\/journal.pntd.corrections_policy","source":"Crossref","is-referenced-by-count":9,"title":["Multimodal biomarker discovery for active Onchocerca volvulus infection"],"prefix":"10.1371","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0638-1313","authenticated-orcid":true,"given":"Ole","family":"Lagatie","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emmanuel","family":"Njumbe Ediage","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dirk","family":"Van Roosbroeck","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stijn","family":"Van Asten","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ann","family":"Verheyen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Linda","family":"Batsa Debrah","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alex","family":"Debrah","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maurice R.","family":"Odiere","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ruben","family":"T\u2019Kindt","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9503-4761","authenticated-orcid":true,"given":"Emmie","family":"Dumont","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Koen","family":"Sandra","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0573-9982","authenticated-orcid":true,"given":"Lieve","family":"Dillen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9808-5617","authenticated-orcid":true,"given":"Tom","family":"Verhaeghe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3568-1371","authenticated-orcid":true,"given":"Rob","family":"Vreeken","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Filip","family":"Cuyckens","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7818-9390","authenticated-orcid":true,"given":"Lieven J.","family":"Stuyver","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2021,11,29]]},"reference":[{"key":"pntd.0009999.ref001","unstructured":"WHO. 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