{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,16]],"date-time":"2026-02-16T16:11:23Z","timestamp":1771258283062,"version":"3.50.1"},"reference-count":61,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2014,7,18]],"date-time":"2014-07-18T00:00:00Z","timestamp":1405641600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"UPM Fundamental Research Grant"},{"name":"NUS SoM Start-up Grant","award":["R-182-000-160-733"],"award-info":[{"award-number":["R-182-000-160-733"]}]},{"name":"NUS SoM Start-up Grant","award":["R-182-000-160-133"],"award-info":[{"award-number":["R-182-000-160-133"]}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Ophthalmologica"],"published-print":{"date-parts":[[2014,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>The aim of the study was to determine the prevalence of human papillomavirus (HPV) in primary and recurrent pterygia samples collected from different ethnic groups in the equatorial Malay Peninsula.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>DNA was extracted from 45 specimens of freshly obtained primary and recurrent pterygia from patients and from 11 normal conjunctival swabs from volunteers with no ocular surface lesion as control. The presence of HPV DNA was detected by nested PCR. PCR\u2010positive samples were subjected to DNA sequencing to determine the HPV genotypes. Real\u2010time PCR with HPV16 and HPV18 type\u2010specific TaqMan probes was employed to determine the viral DNA copy number.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Of 45 pterygia samples with acceptable DNA quality, 29 (64.4%) were positive for HPV DNA, whereas all the normal conjunctiva swabs were HPV negative. Type 18 was the most prevalent (41.4% of positive samples) genotype followed by type 16 (27.6%). There was one case each of the less common HPV58 and HPV59. Seven of the samples harboured mixed infections of both HPV16 and HPV18. All the four known recurrent pterygia samples were HPV\u2010positive, whereas the sole early\u2010stage pterygium sample in the study was HPV\u2010negative. There was no significant association between HPV\u2010positive status with gender or age. A high proportion of patients from the Indian ethnic group (five of six) were HPV\u2010positive, whereas the Malay patients were found to have higher HPV positivity than the Chinese. The viral load of HPV18 samples ranged between 2 \u00d7 10<jats:sup>2<\/jats:sup> and 3 \u00d7 10<jats:sup>4<\/jats:sup> copies per \u03bcg, whereas the viral load of HPV16 specimen was 4 \u00d7 10<jats:sup>1<\/jats:sup> to 10<jats:sup>2<\/jats:sup> copies per \u03bcg.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>This report describes for the first time the quantitative measurement of HPV viral DNA for pterygium samples. The high prevalence of oncogenic HPVs in our samples suggests a possible role for HPV in the pathogenesis of pterygia. Moreover, the relatively low HPV viral load is concordant with the premalignant nature of this ocular condition.<\/jats:p><\/jats:sec>","DOI":"10.1111\/aos.12427","type":"journal-article","created":{"date-parts":[[2014,7,18]],"date-time":"2014-07-18T07:09:14Z","timestamp":1405667354000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Prevalence and viral load of oncogenic human papillomavirus (<scp>HPV<\/scp>) in pterygia in multi\u2010ethnic patients in the <scp>M<\/scp>alay <scp>P<\/scp>eninsula"],"prefix":"10.1111","volume":"92","author":[{"given":"Pei Pei","family":"Chong","sequence":"first","affiliation":[{"name":"Department of Biomedical Science Faculty of Medicine and Health Sciences University Putra Malaysia Serdang Malaysia"},{"name":"Institute of Bioscience Universiti Putra Malaysia Serdang Malaysia"},{"name":"Translational Infectious Diseases Laboratory Centre for Translational Medicine Department of Microbiology Yong Loo Lin School of Medicine National University of Singapore Singapore City Singapore"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chee Hong","family":"Tung","sequence":"additional","affiliation":[{"name":"Department of Biomedical Science Faculty of Medicine and Health Sciences University Putra Malaysia Serdang Malaysia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nurul Asyikin bt Abdul","family":"Rahman","sequence":"additional","affiliation":[{"name":"Department of Biomedical Science Faculty of Medicine and Health Sciences University Putra Malaysia Serdang Malaysia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Misako","family":"Yajima","sequence":"additional","affiliation":[{"name":"Translational Infectious Diseases Laboratory Centre for Translational Medicine Department of Microbiology Yong Loo Lin School of Medicine National University of Singapore Singapore City Singapore"},{"name":"Department of Virology University of Toyama Toyama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fee Wai","family":"Chin","sequence":"additional","affiliation":[{"name":"Department of Biomedical Science Faculty of Medicine and Health Sciences University Putra Malaysia Serdang Malaysia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Crystale Lim Siew","family":"Yeng","sequence":"additional","affiliation":[{"name":"Faculty of Allied Sciences University College Sedaya International Kuala Lumpur Malaysia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eng Soon","family":"Go","sequence":"additional","affiliation":[{"name":"Opthalmology Unit Department of Surgery Faculty of Medicine and Health Sciences University Putra Malaysia Serdang Malaysia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cordelia M. 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