近年來基礎研究與臨床轉化研究的相互結合使癌癥治療的研究取得飛速進展。7月24日晚7點,Cell Press細胞出版社旗下期刊Med,Cell Reports Medicine與Cell Chemical Biology將聯手舉辦題為“Cell Press Live :癌癥治療——從基礎到臨床研究”在線學術研討會。本次研討會將邀請邵志敏、儲以微、魯智豪、吳晨四位專家學者與我們分享癌癥治療研究的最新進展與前沿研究領域,歡迎大家觀看。
Esophageal squamous-cell carcinoma (ESCC) is commonly treated with radiotherapy; however, radioresistance hinders its clinical effectiveness, and the underlying mechanism remains elusive. Here, we develop patient-derived xenografts (PDXs) from 19 patients with ESCC to investigate the mechanisms driving radioresistance. We reveal an enrichment of cancer-associated fibroblast (CAF)-derived collagen type 1 (Col1) and tumor-cell-derived CXCL1 in the tumor microenvironment of non-responsive PDXs. Col1 not only promotes radioresistance of tumor cells by augmenting DNA repair capacity, but also induces tumor cells to secrete CXCL1, which can further activate CAFs, thus establishing a positive feedback loop. Directly interfering with tumor-cell-derived CXCL1 or inhibiting the CXCL1-CXCR2 pathway effectively restores the radiosensitivity of radioresistant xenografts in vivo. Collectively, our study provides a comprehensive understanding of the molecular mechanisms underlying radioresistance and identifies potential targets to improve the efficacy of radiotherapy for ESCC.