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首页> 外文期刊>Cell and Tissue Research >Characterization and comparison of telomere length, telomerase and reverse transcriptase activity and gene expression in human mesenchymal stem cells and cancer cells of various origins.
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Characterization and comparison of telomere length, telomerase and reverse transcriptase activity and gene expression in human mesenchymal stem cells and cancer cells of various origins.

机译:人源间充质干细胞和癌细胞中端粒长度,端粒酶和逆转录酶活性以及基因表达的特征与比较。

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We have characterized and compared the telomere length, telomerase, reverse transcriptase (RT) activity and expression of genes implicated in cancer and in pluripotency, in human mesenchymal stem cells (MSCs) derived from dental papilla tissue, umbilical cord matrix and adipose tissue and in cancer cells (MDA-MB-231, U-87 MG, and MCF-7). MRC-5 fetal fibroblasts and adult muscle cells were used as somatic cell controls. Telomere length was significantly (P<0.05) higher in MSCs and somatic cells (7.2-9.3 kb) than in cancer cell lines (3.9-6 kb). However, the relative telomerase activity (RTA) in the cancer cell lines was significantly (P<0.05) higher than that of MSCs and somatic cells. RTA tended to be slightly higher in MSCs but no significant differences were observed between some cancer cells and MSCs. However, RTA was not detected in somatic cells. Although differentially displayed, the expression of genes related to cancer (BCL-2, p53, NF-kappaB, TGF-beta, VEGF) and transcription and pluripotency (OCT4, NANOG, STAT3, REX1) were commonly observed in MSCs and cancer cells. Thus, endogenous non-telomerase RTA might be a potential biological marker or regulator among MSCs and cancer cells. Further, by sharing the biological and molecular markers of self-renewal and proliferation with cancer cells, MSCs might play a contributory role as tissue resident stem cells in tumor development.
机译:我们已经表征和比较了源自牙乳头组织,脐带基质和脂肪组织的人间充质干细胞(MSC)中端粒的长度,端粒酶,逆转录酶(RT)活性以及与癌症和多能性有关的基因的表达。癌细胞(MDA-MB-231,U-87 MG和MCF-7)。 MRC-5胎儿成纤维细胞和成年肌肉细胞用作体细胞对照。与癌细胞系(3.9-6 kb)相比,MSCs和体细胞(7.2-9.3 kb)的端粒长度显着(P <0.05)高。然而,癌细胞系中的相对端粒酶活性(RTA)显着(P <0.05)高于MSC和体细胞。 MSC中的RTA倾向于略高,但在某些癌细胞和MSC之间未观察到显着差异。但是,在体细胞中未检测到RTA。尽管差异显示,但在MSC和癌细胞中通常观察到与癌症相关的基因(BCL-2,p53,NF-κB,TGF-β,VEGF)的表达以及转录和多能性(OCT4,NANOG,STAT3,REX1)。因此,内源性非端粒酶RTA可能是MSC和癌细胞之间潜在的生物学标记或调节剂。此外,通过与癌细胞共享自我更新和增殖的生物学和分子标记,MSCs可能在肿瘤发展中作为组织驻留干细胞发挥重要作用。

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