{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,29]],"date-time":"2026-06-29T11:22:30Z","timestamp":1782732150520,"version":"3.54.5"},"reference-count":120,"publisher":"Oxford University Press (OUP)","issue":"1","license":[{"start":{"date-parts":[[2021,11,3]],"date-time":"2021-11-03T00:00:00Z","timestamp":1635897600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"funder":[{"DOI":"10.13039\/501100000925","name":"NHMRC","doi-asserted-by":"publisher","award":["1143366"],"award-info":[{"award-number":["1143366"]}],"id":[{"id":"10.13039\/501100000925","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000925","name":"NHMRC","doi-asserted-by":"publisher","award":["APP1103384"],"award-info":[{"award-number":["APP1103384"]}],"id":[{"id":"10.13039\/501100000925","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000925","name":"NHMRC","doi-asserted-by":"publisher","award":["GNT1195743"],"award-info":[{"award-number":["GNT1195743"]}],"id":[{"id":"10.13039\/501100000925","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2022,1,17]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Conventional supervised binary classification algorithms have been widely applied to address significant research questions using biological and biomedical data. This classification scheme requires two fully labeled classes of data (e.g. positive and negative samples) to train a classification model. However, in many bioinformatics applications, labeling data is laborious, and the negative samples might be potentially mislabeled due to the limited sensitivity of the experimental equipment. The positive unlabeled (PU) learning scheme was therefore proposed to enable the classifier to learn directly from limited positive samples and a large number of unlabeled samples (i.e. a mixture of positive or negative samples). To date, several PU learning algorithms have been developed to address various biological questions, such as sequence identification, functional site characterization and interaction prediction. In this paper, we revisit a collection of 29 state-of-the-art PU learning bioinformatic applications to address various biological questions. Various important aspects are extensively discussed, including PU learning methodology, biological application, classifier design and evaluation strategy. We also comment on the existing issues of PU learning and offer our perspectives for the future development of PU learning applications. We anticipate that our work serves as an instrumental guideline for a better understanding of the PU learning framework in bioinformatics and further developing next-generation PU learning frameworks for critical biological applications.<\/jats:p>","DOI":"10.1093\/bib\/bbab461","type":"journal-article","created":{"date-parts":[[2021,10,8]],"date-time":"2021-10-08T11:38:41Z","timestamp":1633693121000},"source":"Crossref","is-referenced-by-count":63,"title":["Positive-unlabeled learning in bioinformatics and computational biology: a brief review"],"prefix":"10.1093","volume":"23","author":[{"given":"Fuyi","family":"Li","sequence":"first","affiliation":[{"name":"Monash University, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuangyu","family":"Dong","sequence":"additional","affiliation":[{"name":"Monash University, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andr\u00e9","family":"Leier","sequence":"additional","affiliation":[{"name":"Department of Genetics, UAB School of Medicine, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Meiya","family":"Han","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Molecular Biology, Monash University, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xudong","family":"Guo","sequence":"additional","affiliation":[{"name":"Ningxia University, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing","family":"Xu","sequence":"additional","affiliation":[{"name":"Computer Science and Technology from Nankai University, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoyu","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Molecular Biology and Biomedicine Discovery Institute, 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