研究揭示骨髓間充質幹細胞在急性髓系白血病發生中的作用
作者:
小柯機器人發布時間:2020/9/24 13:20:36
英國劍橋大學幹細胞研究所Simón Méndez-Ferrer、瑞士巴塞爾大學Juerg Schwaller等研究人員合作發現,骨髓間充質幹細胞支持急性髓樣白血病生物能並增強抗氧化防禦能力,從而逃逸化療。2020年9月22日《細胞—代謝》雜誌在線發表了這項成果。
研究人員探索了巢蛋白+骨髓(BM)間充質幹細胞(BMSC)對MLL-AF9驅動的急性髓性白血病(AML)的發展和體內化療抗性的貢獻。與純基質不同,巢蛋白+BMSC的數目在AML中不會減少,但它們的功能會改變從而支持AML細胞,但會以未突變的造血幹細胞(HSC)為代價。巢蛋白+細胞耗竭可延遲原發性AML小鼠的白血病生成,並選擇性降低嵌合型小鼠的AML細胞,但不減少正常細胞。
巢蛋白+BMSC通過增加氧化磷酸化、三羧酸(TCA)循環活性和穀胱甘肽(GSH)介導的抗氧化防禦來促進AML的生存和化療復發。因此,AML細胞從骨髓間充質幹細胞中獲取能量來源和抗氧化防禦機制來維持化療存活。
據介紹,與正常的造血幹細胞一樣,白血病幹細胞的生存依賴於BM的微環境,但其潛在機制仍然未知。
附:英文原文
Title: Bone Marrow Mesenchymal Stem Cells Support Acute Myeloid Leukemia Bioenergetics and Enhance Antioxidant Defense and Escape from Chemotherapy
Author: Dorian Forte, María García-Fernández, Abel Sánchez-Aguilera, Vaia Stavropoulou, Claire Fielding, Daniel Martín-Pérez, Juan Antonio López, Ana S.H. Costa, Laura Tronci, Efterpi Nikitopoulou, Michael Barber, Paolo Gallipoli, Ludovica Marando, Carlos López Fernández de Castillejo, Alexandar Tzankov, Sabine Dietmann, Michele Cavo, Lucia Catani, Antonio Curti, Jesús Vázquez, Christian Frezza, Brian J. Huntly, Juerg Schwaller, Simón Méndez-Ferrer
Issue&Volume: 2020-09-22
Abstract: Like normal hematopoietic stem cells, leukemic stem cells depend on their bone marrow (BM) microenvironment for survival, but the underlying mechanisms remain largely unknown. We have studied the contribution of nestin+ BM mesenchymal stem cells (BMSCs) to MLL-AF9-driven acute myeloid leukemia (AML) development and chemoresistance in vivo. Unlike bulk stroma, nestin+ BMSC numbers are not reduced in AML, but their function changes to support AML cells, at the expense of non-mutated hematopoietic stem cells (HSCs). Nestin+ cell depletion delays leukemogenesis in primary AML mice and selectively decreases AML, but not normal, cells in chimeric mice. Nestin+ BMSCs support survival and chemotherapy relapse of AML through increased oxidative phosphorylation, tricarboxylic acid (TCA) cycle activity, and glutathione (GSH)-mediated antioxidant defense. Therefore, AML cells co-opt energy sources and antioxidant defense mechanisms from BMSCs to survive chemotherapy.
DOI: 10.1016/j.cmet.2020.09.001
Source: https://www.cell.com/cell-metabolism/fulltext/S1550-4131(20)30479-4