{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T10:07:01Z","timestamp":1783937221223,"version":"3.55.0"},"reference-count":73,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T00:00:00Z","timestamp":1783900800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"self-funded"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Veterinary Sciences"],"abstract":"<jats:p>Intradermal injections of anti-canine immunoglobulin E (IgE) in healthy dogs have been utilized in preclinical drug testing to evaluate the efficacy of anti-allergic drugs used to treat canine atopic dermatitis (AD). However, the molecular effects of established canine anti-allergic drugs on this acute canine IgE-mediated atopic model remain largely uninvestigated. The objective of this study was to characterize the effect of proactive oclacitinib and prednisolone treatments on the immune and skin barrier transcriptome of IgE-mediated late-phase reactions (LPRs) in an acute model of canine AD. Sixteen healthy adult research-bred beagles were randomized to receive either oclacitinib or prednisolone orally for six days, followed by an intradermal anti-canine IgE injection. Biopsies were collected 24 h post-injection for RNA isolation and sequencing; previously analyzed transcriptomes (healthy skin, saline-injected skin, IgE lesions without drug modulation) from the same colony of dogs served as controls. Administration of prednisolone and oclacitinib prior to intradermal anti-IgE injections reduced the number of differentially expressed genes (DEGs) in 24 h samples to 1251 and 1471, respectively. Both treatments resulted in a decrease in expression of several significantly upregulated T helper-(Th)1 (e.g., MX1, OAS1, STAT1), Th2 (e.g., CCL13, CCL8, IL13RA1, IL-33, IL5RA, OSM), chemokine and receptor (e.g., CCL19, CCL2, CCL3, CCR1, CCR3) genes in comparison to the untreated IgE-mediated lesions. Interestingly, only prednisolone treatment significantly reduced IL-13 upregulation, an important gene in the Th2 immune response. In conclusion, both prednisolone and oclacitinib reduced the transcriptomic changes observed in the acute lesions of the canine IgE-induced atopic dermatitis model, with prednisolone inducing a broader inhibitory immune response.<\/jats:p>","DOI":"10.3390\/vetsci13070676","type":"journal-article","created":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T08:53:58Z","timestamp":1783932838000},"page":"676","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Transcriptomic Effects of Oclacitinib and Prednisolone in an Acute IgE-Mediated Experimental Model of Canine Atopic Dermatitis"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-4519-5100","authenticated-orcid":false,"given":"Renato","family":"Leon","sequence":"first","affiliation":[{"name":"College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3918-6004","authenticated-orcid":false,"given":"Amanda","family":"Blubaugh","sequence":"additional","affiliation":[{"name":"College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haley","family":"Starr","sequence":"additional","affiliation":[{"name":"College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4785-4121","authenticated-orcid":false,"given":"Frane","family":"Banovic","sequence":"additional","affiliation":[{"name":"College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,7,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"375","DOI":"10.1111\/vde.13300","article-title":"Updated Insights into the Molecular Pathogenesis of Canine Atopic Dermatitis","volume":"36","author":"Banovic","year":"2025","journal-title":"Vet. 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