03/03/2026
Claudin proteins as emerging therapeutic targets for solid tumours
Claudins (CLDNs) are transmembrane proteins that contribute to the epithelial cell polarity and integrity of tight junctions in healthy tissues. CLDNs are frequently overexpressed across different solid tumours, and expression correlates with tumour subtype, grade and prognosis. Dysregulated CLDN expression modulates oncogenic signalling and contributes to tumour proliferation, epithelial–mesenchymal transition, stemness, fibrosis, immune modulation and therapeutic resistance. Owing to their frequent overexpression and functional role in cancer biology, CLDNs have emerged as attractive therapeutic targets. Their surface expression can be exploited to guide therapies into tumours.
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