Department of General Surgery & Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
The Tenth Affiliated Hospital of Southern Medical University, Dongguan, Guangdong, 523059, China.
Adv Sci (Weinh). 2024 Sep;11(33):e2402107. doi: 10.1002/advs.202402107. Epub 2024 Jul 2.
The extracellular matrix (ECM) is critical for drug resistance in colorectal cancer (CRC). The abundant collagen within the ECM significantly influences tumor progression and matrix-mediated drug resistance (MMDR) by binding to discoidin domain receptor 1 (DDR1), but the specific mechanisms by which tumor cells modulate ECM via DDR1 and ultimately regulate TME remain poorly understand. Furthermore, overcoming drug resistance by modulating the tumor ECM remains a challenge in CRC treatment. In this study, a novel mechanism is elucidated by which DDR1 mediates the interactions between tumor cells and collagen, enhances collagen barriers, inhibits immune infiltration, promotes drug efflux, and leads to MMDR in CRC. To address this issue, a multistage drug delivery system carrying DDR1-siRNA and chemotherapeutic agents is employed to disrupt collagen barriers by silencing DDR1 in tumor, enhancing chemotherapy drugs diffusion and facilitating immune infiltration. These findings not only revealed a novel role for collagen-rich matrix mediated by DDR1 in tumor resistance, but also introduced a promising CRC treatment strategy.
细胞外基质(ECM)对于结直肠癌(CRC)的耐药性至关重要。ECM 中丰富的胶原蛋白通过与盘状结构域受体 1(DDR1)结合,显著影响肿瘤进展和基质介导的耐药性(MMDR),但肿瘤细胞通过 DDR1 调节 ECM 的具体机制以及最终调节 TME 仍知之甚少。此外,通过调节肿瘤 ECM 来克服耐药性仍然是 CRC 治疗中的一个挑战。在这项研究中,揭示了一个新的机制,即 DDR1 介导肿瘤细胞与胶原蛋白之间的相互作用,增强胶原蛋白屏障,抑制免疫浸润,促进药物外排,导致 CRC 的 MMDR。为了解决这个问题,采用了一种多阶段药物输送系统,携带 DDR1-siRNA 和化疗药物,通过沉默肿瘤中的 DDR1 来破坏胶原蛋白屏障,增强化疗药物的扩散并促进免疫浸润。这些发现不仅揭示了 DDR1 介导的富含胶原蛋白的基质在肿瘤耐药性中的新作用,还提出了一种有前途的 CRC 治疗策略。
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