{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T12:47:38Z","timestamp":1790254058944,"version":"4.1.0"},"reference-count":28,"publisher":"American Society for Microbiology","issue":"12","license":[{"start":{"date-parts":[[2010,12,1]],"date-time":"2010-12-01T00:00:00Z","timestamp":1291161600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["J Clin Microbiol"],"published-print":{"date-parts":[[2010,12]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n          <jats:p>The only clinically validated assay available to determine HIV tropism is Trofile, an assay that possesses some limitations. Our first aim was to develop a new phenotypic tropism test (TROCAI [tropism coreceptor assay information]) and to categorize results generated by this test according to the virological response to a short-term exposure to the CCR5 receptor antagonist maraviroc (maraviroc clinical test). Our second aim was to compare TROCAI results to those obtained by Trofile enhanced sensitivity (ES) and to different genotypic algorithms. TROCAI assayed HIV tropism in 33 HIV-infected patient viral isolates obtained from a modified coculture, followed by multiple infection cycles of indicator cells. TROCAI obtained a reportable result in all patients with viral loads of &gt;500 HIV RNA copies\/ml and in 3\/6 patients with &lt;500 HIV RNA copies\/ml (30\/33 patients, 91.9%). Patients who responded to maraviroc had an X4-using virus proportion in indicator cell supernatant of 0 to 0.41%. Hence, we used the threshold of 0.5% to categorize TROCAI results as R5 (&lt;0.5%) or dual\/mixed (&gt;0.5%). The concordance between TROCAI and Trofile (ES) was 22\/24 (91.6%), and with genotypic approaches it was 22\/26 (84.6%). TROCAI results, which were categorized in this study by the maraviroc clinical test, could be used as a test in addition to those currently used to select patients for treatment with CCR5 antagonists.<\/jats:p>","DOI":"10.1128\/jcm.00953-10","type":"journal-article","created":{"date-parts":[[2010,10,14]],"date-time":"2010-10-14T07:13:42Z","timestamp":1287040422000},"page":"4453-4458","update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":21,"title":["TROCAI (Tropism Coreceptor Assay Information): a New Phenotypic Tropism Test and Its Correlation with Trofile Enhanced Sensitivity and Genotypic Approaches"],"prefix":"10.1128","volume":"48","author":[{"given":"Alejandro","family":"Gonzalez-Serna","sequence":"first","affiliation":[{"name":"Laboratory of Immunovirology, Biomedicine Institute of Seville (IBIS), Infectious Diseases Service, Virgen del Roci\u0301o University Hospital, Seville, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Manuel","family":"Leal","sequence":"additional","affiliation":[{"name":"Laboratory of Immunovirology, Biomedicine Institute of Seville (IBIS), Infectious Diseases Service, Virgen del Roci\u0301o University Hospital, Seville, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Miguel","family":"Genebat","sequence":"additional","affiliation":[{"name":"Laboratory of Immunovirology, Biomedicine Institute of Seville (IBIS), Infectious Diseases Service, Virgen del Roci\u0301o University Hospital, Seville, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria Antonia","family":"Abad","sequence":"additional","affiliation":[{"name":"Laboratory of Immunovirology, Biomedicine Institute of Seville (IBIS), Infectious Diseases Service, Virgen del Roci\u0301o University Hospital, Seville, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antonio","family":"Garcia-Perganeda","sequence":"additional","affiliation":[{"name":"Laboratory of Immunovirology, Biomedicine Institute of Seville (IBIS), Infectious Diseases Service, Virgen del Roci\u0301o University Hospital, Seville, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sara","family":"Ferrando-Martinez","sequence":"additional","affiliation":[{"name":"Laboratory of Immunovirology, Biomedicine Institute of Seville (IBIS), Infectious Diseases Service, Virgen del Roci\u0301o University Hospital, Seville, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ezequiel","family":"Ruiz-Mateos","sequence":"additional","affiliation":[{"name":"Laboratory of Immunovirology, Biomedicine Institute of Seville (IBIS), Infectious Diseases Service, Virgen del Roci\u0301o University Hospital, Seville, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"235","reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1097\/QAD.0b013e32832b4399"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1038\/34571"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1002\/jmv.21425"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.94.24.13193"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.1128\/AAC.00229-09"},{"key":"e_1_3_3_7_2","doi-asserted-by":"publisher","DOI":"10.1128\/JCM.02090-06"},{"key":"e_1_3_3_8_2","doi-asserted-by":"publisher","DOI":"10.1097\/QAI.0b013e3181734f0e"},{"key":"e_1_3_3_9_2","doi-asserted-by":"publisher","DOI":"10.1128\/JCM.40.6.2089-2094.2002"},{"key":"e_1_3_3_10_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.278.5341.1295"},{"key":"e_1_3_3_11_2","doi-asserted-by":"publisher","DOI":"10.1093\/jac\/dkp293"},{"key":"e_1_3_3_12_2","doi-asserted-by":"crossref","unstructured":"Genebat M. E. Ruiz-Mateos I. Pulido A. Gonz\u00e1lez-Serna A. Garc\u00eda-Perga\u00f1eda G. M\u00e9ndez M. C. Romero-S\u00e1nchez S. Ferrando-Mart\u00ednez and M. Leal. 2010. Long-term immunovirological effect and tolerability of a maraviroc-containing regimen in routine clinical practice. Curr. HIV Res. 8 : 482-486.","DOI":"10.2174\/157016210793499295"},{"key":"e_1_3_3_13_2","doi-asserted-by":"publisher","DOI":"10.1001\/jama.300.5.555"},{"key":"e_1_3_3_14_2","doi-asserted-by":"publisher","DOI":"10.1128\/JCM.00632-09"},{"key":"e_1_3_3_15_2","doi-asserted-by":"publisher","DOI":"10.1128\/JVI.02676-07"},{"key":"e_1_3_3_16_2","doi-asserted-by":"publisher","DOI":"10.1086\/592052"},{"key":"e_1_3_3_17_2","doi-asserted-by":"publisher","DOI":"10.1097\/QAD.0b013e3282ef81ea"},{"key":"e_1_3_3_18_2","doi-asserted-by":"publisher","DOI":"10.1086\/314628"},{"key":"e_1_3_3_19_2","doi-asserted-by":"publisher","DOI":"10.1093\/jac\/dkp063"},{"key":"e_1_3_3_20_2","doi-asserted-by":"publisher","DOI":"10.1097\/QAD.0b013e32830ebcd4"},{"key":"e_1_3_3_21_2","first-page":"94","volume":"3","year":"2009","unstructured":"Reeves, J. D., E. Coakley, C. J. Petropoulos, and J. M. Whitcomb. 2009. An enhanced sensitivity Trofile HIV coreceptor tropism assay for selecting patients for therapy with entry inhibitors targeting CCR5: a review of analytical and clinical studies. J. Viral Entry 3 : 94-102.","journal-title":"J. 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