The Mary & John Knight Translational Ovarian Cancer Research Unit, Lawson Health Research Institute and London Health Sciences Centre, London, ON, Canada.
Department of Anatomy & Cell Biology, Schulich School of Medicine & Dentistry, Western University, London, ON, Canada.
Clin Exp Metastasis. 2022 Apr;39(2):291-301. doi: 10.1007/s10585-021-10136-5. Epub 2021 Nov 25.
Epithelial ovarian cancer (EOC) is the most lethal gynecological malignancy in the developed world. EOC metastasis is unique since malignant cells detach directly from the primary tumor site into the abdominal fluid and form multicellular aggregates, called spheroids, that possess enhanced survival mechanisms while in suspension. As such, altered cell adhesion properties are paramount to EOC metastasis with cell detachment from the primary tumor, dissemination as spheroids, and reattachment to peritoneal surfaces for secondary tumor formation. The ability for EOC cells to establish and maintain cell-cell contacts in spheroids is critical for cell survival in suspension. Integrins are a family of cell adhesion receptors that play a crucial role in cell-cell and cell-extracellular matrix interactions. These glycoprotein receptors regulate diverse functions in tumor cells and are implicated in multiple steps of cancer progression. Altered integrin expression is detected in numerous carcinomas, where they play a role in cell migration, invasion, and anchorage-independent survival. Like that observed for other carcinomas, epithelial-mesenchymal transition (EMT) occurs during metastasis and integrins can function in this process as well. Herein, we provide a review of the evidence for integrin-mediated cell adhesion mechanisms impacting steps of EOC metastasis. Taken together, targeting integrin function may represent a potential therapeutic strategy to inhibit progression of advanced EOC.
上皮性卵巢癌 (EOC) 是发达国家最致命的妇科恶性肿瘤。EOC 转移具有独特性,因为恶性细胞直接从原发性肿瘤部位脱落到腹腔液中,并形成具有增强生存机制的多细胞聚集体,称为球体。因此,改变细胞黏附特性对于 EOC 转移至关重要,包括细胞从原发性肿瘤脱落、以球体形式扩散,以及重新附着到腹膜表面形成继发性肿瘤。EOC 细胞在球体中建立和维持细胞-细胞接触的能力对于悬浮细胞的存活至关重要。整合素是细胞黏附受体家族,在细胞-细胞和细胞-细胞外基质相互作用中发挥着关键作用。这些糖蛋白受体调节肿瘤细胞的多种功能,并参与癌症进展的多个步骤。在许多癌中都检测到整合素表达改变,它们在细胞迁移、侵袭和非锚定依赖性存活中发挥作用。与其他癌一样,上皮-间充质转化 (EMT) 发生在转移过程中,整合素也可以在这个过程中发挥作用。本文综述了整合素介导的细胞黏附机制对 EOC 转移步骤的影响。总之,靶向整合素功能可能代表抑制晚期 EOC 进展的潜在治疗策略。
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