ArticleJournal of experimental & clinical cancer research : CR2025
Blockade of αvβ6 and αvβ8 integrins with a chromogranin A-derived peptide inhibits TGFβ activation in tumors and suppresses tumor growth.
Article in Journal of experimental & clinical cancer research : CR, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- An orally bioavailable pan-αv/α5β1 integrin antagonist prevents aggressive prostate cancer progression via suppressing both oncogenic signals and CD47-mediated immune escape.Molecular cancer · 2026Article
- Epithelial Integrins Coordinate Cellular Crosstalk Through the Regulation of Cytokines During Tissue Remodeling.International journal of molecular sciences · 2026Review
- Comprehensive analysis of the TGF-β signaling pathway: molecular mechanisms, disease drivers, and frontiers in clinical translation.Frontiers in immunology · 2026Review
- Article
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Authors and funding
15 authors.
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Abstract
backgroundThe αvβ6- and αvβ8-integrins, two cell-adhesion receptors upregulated in many solid tumors, can promote the activation of transforming growth factor-β (TGFβ), a potent immunosuppressive cytokine, by interacting with the RGD sequence of the latency-associated peptide (LAP)/TGFβ complex. We have previously described a chromogranin A-derived peptide, called "peptide 5a", which recognizes the RGD-binding site of both αvβ6 and αvβ8 with high affinity and selectivity, and efficiently accumulates in αvβ6- or αvβ8-positive tumors. This study aims to demonstrate that peptide 5a can inhibit TGFβ activation in tumors and suppress tumor growth.
methodsPeptide 5a was chemically coupled to human serum albumin (HSA) to prolong its plasma half-life. The integrin recognition properties of this conjugate (called 5a-HSA) and its capability to block TGFβ activation by αvβ6
resultsIn vitro assays showed that peptide 5a coupled to HSA maintains its capability of recognizing αvβ6 and αvβ8 with high affinity and selectivity and inhibits TGFβ activation mediated by αvβ6
conclusionPeptide 5a is an efficient tumor-homing inhibitor of αvβ6- and αvβ8-integrin that after coupling to HSA, can be used as a drug to block integrin-dependent TGFβ activation in tumors and promote immunotherapeutic responses.
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