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- W4361823328 abstract "<div>Abstract<p>Excess stroma and cancer-associated fibroblasts (CAF) enhance cancer progression and facilitate immune evasion. Insights into the mechanisms by which the stroma manipulates the immune microenvironment could help improve cancer treatment. Here, we aimed to elucidate potential approaches for stromal reprogramming and improved cancer immunotherapy. Platelet-derived growth factor C (PDGFC) and D expression were significantly associated with a poor prognosis in patients with gastric cancer, and PDGF receptor beta (PDGFRβ) was predominantly expressed in diffuse-type gastric cancer stroma. CAFs stimulated with PDGFs exhibited markedly increased expression of CXCL1, CXCL3, CXCL5, and CXCL8, which are involved in polymorphonuclear myeloid-derived suppressor cell (PMN-MDSC) recruitment. Fibrotic gastric cancer xenograft tumors exhibited increased PMN-MDSC accumulation and decreased lymphocyte infiltration, as well as resistance to anti–PD-1. Single-cell RNA sequencing and spatial transcriptomics revealed that PDGFRα/β blockade reversed the immunosuppressive microenvironment through stromal modification. Finally, combining PDGFRα/β blockade and anti–PD-1 treatment synergistically suppressed the growth of fibrotic tumors. These findings highlight the impact of stromal reprogramming on immune reactivation and the potential for combined immunotherapy for patients with fibrotic cancer.</p>Significance:<p>Stromal targeting with PDGFRα/β dual blockade reverses the immunosuppressive microenvironment and enhances the efficacy of immune checkpoint inhibitors in fibrotic cancer.</p><p><i><a href=https://aacrjournals.org/cancerres/article/doi/10.1158/0008-5472.CAN-22-3677 target=_blank>See related commentary by Tauriello, p. 655</a></i></p></div>" @default.
- W4361823328 created "2023-04-05" @default.
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- W4361823328 date "2023-03-31" @default.
- W4361823328 modified "2023-10-16" @default.
- W4361823328 title "Data from Stromal Reprogramming through Dual PDGFRα/β Blockade Boosts the Efficacy of Anti–PD-1 Immunotherapy in Fibrotic Tumors" @default.
- W4361823328 doi "https://doi.org/10.1158/0008-5472.c.6514332.v1" @default.
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