Lgr5陰性癌細胞可塑性驅動結直腸癌轉移
作者:
小柯機器人發布時間:2020/3/23 17:43:49
荷蘭癌症研究所Jacco van Rheenen研究組取得一項新進展,他們的最新工作表明,Lgr5陰性癌細胞的可塑性能夠驅動結直腸癌的轉移。該研究於2020年3月12日在線發表於《細胞—幹細胞》雜誌。
研究人員使用了結直腸癌(CRC)和人類腫瘤異種移植的小鼠模型來研究轉移灶細胞。他們發現循環中大多數散布的CRC細胞為Lgr5-,並形成了遠處轉移灶,其中出現了Lgr5+腫瘤幹細胞(CSC)。這種可塑性不依賴於乾性誘導的微環境因素,並且對於轉移的生長而非轉移的建立是必不可少的。因此,這些發現表明,大多數結直腸癌轉移灶都是由Lgr5-細胞傳播的,這些細胞顯示出不依賴於微環境而成為CSC的本質能力,並且可以在轉移性腫瘤中重建上皮層級。
據介紹,結直腸CSC表達Lgr5,並表現出大量的幹細胞樣多能性和自我更新能力,被認為是轉移性疾病的種子。
附:英文原文
Title: Plasticity of Lgr5-Negative Cancer Cells Drives Metastasis in Colorectal Cancer
Author: Arianna Fumagalli, Koen C. Oost, Lennart Kester, Jessica Morgner, Laura Bornes, Lotte Bruens, Lisa Spaargaren, Maria Azkanaz, Tim Schelfhorst, Evelyne Beerling, Maria C. Heinz, Daniel Postrach, Danielle Seinstra, Anieta M. Sieuwerts, John W.M. Martens, Stefan van der Elst, Martijn van Baalen, Debajit Bhowmick, Nienke Vrisekoop, Saskia I.J. Ellenbroek, Saskia J.E. Suijkerbuijk, Hugo J. Snippert, Jacco van Rheenen
Issue&Volume: 2020-03-12
Abstract: Colorectal cancer stem cells (CSCs) express Lgr5 and display extensive stem cell-like multipotency and self-renewal and are thought to seed metastatic disease. Here, we used a mouse model of colorectal cancer (CRC) and human tumor xenografts to investigate the cell of origin of metastases. We found that most disseminated CRC cells in circulation were Lgr5 and formed distant metastases in which Lgr5+ CSCs appeared. This plasticity occurred independently of stemness-inducing microenvironmental factors and was indispensable for outgrowth, but not establishment, of metastases. Together, these findings show that most colorectal cancer metastases are seeded by Lgr5 cells, which display intrinsic capacity to become CSCs in a niche-independent manner and can restore epithelial hierarchies in metastatic tumors.
DOI: 10.1016/j.stem.2020.02.008
Source: https://www.cell.com/cell-stem-cell/fulltext/S1934-5909(20)30061-8