{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T10:00:41Z","timestamp":1790676041389,"version":"4.1.0"},"reference-count":127,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T00:00:00Z","timestamp":1790640000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Immunol."],"abstract":"<jats:p>Psoriasis is a chronic immune-mediated inflammatory skin disease historically viewed as a disorder of keratinocyte hyperplasia, with subsequent recognition of central immune cell involvement. However, accumulating multi-omics and functional genomic evidence has reshaped this paradigm, positioning keratinocytes not merely as passive targets of immune attack but as active participants within a bidirectional epithelial-immune network that drives inflammatory initiation, maintenance, and amplification. This critical narrative review synthesizes the molecular mechanisms by which keratinocytes integrate genetic susceptibility, environmental triggers, metabolic reprogramming, and cell death programs to modulate psoriatic inflammation. We examine interleukin (IL)-1\/IL-36 cytokines, the dual function of the antimicrobial peptide LL-37, danger signal release and dendritic cell recruitment, chemokine networks and exosome-mediated communication, the neuropeptide-keratinocyte axis, carbohydrate and lipid metabolic abnormalities, mitochondrial dysfunction and reactive oxygen species (ROS)-mediated feedback, epidermal barrier defects and microbiome dysregulation, diagnostic biomarkers, and therapeutic innovations. We further critically evaluate controversies, conceptual challenges, research gaps, and future directions. A keratinocyte-centric framework\u2014situated within the broader context of epithelial-immune reciprocity\u2014advances understanding of psoriasis pathogenesis and informs precision therapies targeting the barrier-immune axis.<\/jats:p>","DOI":"10.3389\/fimmu.2026.1970701","type":"journal-article","created":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T09:35:15Z","timestamp":1790674515000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["The active immune role of keratinocytes: from passive targets to key hubs in psoriatic inflammation"],"prefix":"10.3389","volume":"17","author":[{"given":"Yu","family":"Pei","sequence":"first","affiliation":[{"name":"Department of Dermatology, The Second Affiliated Hospital of Harbin Medical University","place":["Harbin, Heilongjiang, 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