- 积分
- 947
- 威望
- 947
- 包包
- 7
|
发现最近没有人做文献阅读了,我抛砖引玉吧,呵呵6 ^1 W/ C* P# K" c& o x) U E/ d& V }
Tilte:Bone Marrow-Derived Myofibroblasts Contribute to the Mesenchymal Stem Cell Niche and Promote Tumor Growth.5 }( Q6 J l8 C" y( g9 B2 X
Cancer Cell 19, 257–272, February 15, 20117 Q0 ~$ ~' ?* U! ` [$ C, c
Abstract:Carcinoma-associated fibroblasts (CAFs) that express a-smooth muscle actin (aSMA) contribute to cancer progression, but their precise origin and role are unclear. Using mouse models of inflammation-induced gastric cancer, we show that at least 20% of CAFs originate from bone marrow (BM) and derive from mesenchymal stem cells (MSCs). aSMA+ myofibroblasts (MFs) are niche cells normally present in BM and increase markedly during cancer progression. MSC-derived CAFs that are recruited to the dysplastic stomach express IL-6, Wnt5a and BMP4, show DNA hypomethylation, and promote tumor growth. Moreover, CAFs are generated from MSCs and are recruited to the tumor in a TGF-b- and SDF-1a-dependent manner. Therefore, carcinogenesis involves expansion and relocation of BM-niche cells to the tumor to create a niche to sustain cancer progression.
7 H3 n) \# \0 l, |) q文献摘要:表达a-肌动蛋白(a-smooth muscle actin)的肿瘤相关成纤维细胞(Carcinoma-associated fibroblasts)可以促进肿瘤的发展。但是其来源和其扮演角色并不清楚。应用炎症诱导的胃癌小鼠模型,我们的结果显示:至少有20%的CAF来源于骨髓,并由间充质干细胞(MSC)分化而来。aSMA阳性的肌纤维母细胞(myofibroblasts (MFs))通常存在于骨髓中,是一种龛细胞(niche cells)并随着癌症的发展显著增加。MSC分化而来的CAF被招募到发生病变的小鼠胃部,这些CAF表达IL-6,Wnt5a 和BMP4,发生DNA低甲基化,并且会促进肿瘤生长。另外,CAF是由MSC产生,通过TGF-b- 和 SDF-1依赖的方式被招募到肿瘤部位。因此,癌发生包括了骨髓龛细胞的扩增和龛细胞向肿瘤部位的重布置,用以创造一个支持肿瘤发展的龛。
( l4 x3 w. U4 d阅读体会:; X% G9 S; Y: u* h! [- o
1. 本文主要讲CAF有20%来源于骨髓,并且由骨髓MSC分化产生。. I. t- c1 e5 \) O
2. 但,aSMA阳性的细胞却是MSC的龛细胞,构成了MSC的微环境,没有CAF,MSC也不能存活。
/ \; A- B) s1 r8 y7 h7 t+ y3. aSMA阳性的MF可以显著促进肿瘤生长,但纯MSC却没有特别促进肿瘤生长。值得思考啊~~
: s6 x6 f7 Q8 D$ J. D9 H2 ^ |
-
总评分: 威望 + 20
包包 + 30
查看全部评分
|