{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,27]],"date-time":"2026-08-27T09:02:47Z","timestamp":1787821367192,"version":"build-2784847793"},"reference-count":109,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2024,1,26]],"date-time":"2024-01-26T00:00:00Z","timestamp":1706227200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Northern Illinois University"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JoF"],"abstract":"<jats:p>Aspergillus fumigatus is the leading cause of aspergillosis, associated with high mortality rates, particularly in immunocompromised individuals. In search of novel genetic targets against aspergillosis, we studied the WOPR transcription factor OsaA. The deletion of the osaA gene resulted in colony growth reduction. Conidiation is also influenced by osaA; both osaA deletion and overexpression resulted in a decrease in spore production. Wild-type expression levels of osaA are necessary for the expression of the conidiation regulatory genes brlA, abaA, and wetA. In addition, osaA is necessary for normal cell wall integrity. Furthermore, the deletion of osaA resulted in a reduction in the ability of A. fumigatus to adhere to surfaces, decreased thermotolerance, as well as increased sensitivity to oxidative stress. Metabolomics analysis indicated that osaA deletion or overexpression led to alterations in the production of multiple secondary metabolites, including gliotoxin. This was accompanied by changes in the expression of genes in the corresponding secondary metabolite gene clusters. These effects could be, at least in part, due to the observed reduction in the expression levels of the veA and laeA global regulators when the osaA locus was altered. Importantly, our study shows that osaA is indispensable for virulence in both neutropenic and corticosteroid-immunosuppressed mouse models.<\/jats:p>","DOI":"10.3390\/jof10020103","type":"journal-article","created":{"date-parts":[[2024,1,26]],"date-time":"2024-01-26T08:56:01Z","timestamp":1706259361000},"page":"103","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Role of the osaA Gene in Aspergillus fumigatus Development, Secondary Metabolism and Virulence"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-6479-523X","authenticated-orcid":false,"given":"Apoorva","family":"Dabholkar","sequence":"first","affiliation":[{"name":"Department of Biological Sciences, Northern Illinois University, DeKalb, IL 60115, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3292-2654","authenticated-orcid":false,"given":"Sandesh","family":"Pandit","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences, Northern Illinois University, DeKalb, IL 60115, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ritu","family":"Devkota","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences and Eukaryotic Pathogen Innovation Center, Clemson University, Clemson, SC 29634, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sourabh","family":"Dhingra","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences and Eukaryotic Pathogen Innovation Center, Clemson University, Clemson, SC 29634, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0231-6394","authenticated-orcid":false,"given":"Sophie","family":"Lorber","sequence":"additional","affiliation":[{"name":"Toxalim (Research Centre in Food Toxicology), Universit\u00e9 de Toulouse, INRAE, ENVT, INP-Purpan, UPS, 31027 Toulouse, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1946-5310","authenticated-orcid":false,"given":"Olivier","family":"Puel","sequence":"additional","affiliation":[{"name":"Toxalim (Research Centre in Food Toxicology), Universit\u00e9 de Toulouse, INRAE, ENVT, INP-Purpan, UPS, 31027 Toulouse, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ana M.","family":"Calvo","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences, Northern Illinois University, DeKalb, IL 60115, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,1,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"894","DOI":"10.1136\/bmjqs-2012-000803","article-title":"Diagnostic Errors in the Intensive Care Unit: A Systematic Review of Autopsy Studies","volume":"21","author":"Winters","year":"2012","journal-title":"BMJ Qual. 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