Petkova Rumena, Arabadjiev Borislav, Chakarov Stoyan, Pankov Roumen
Scientific Technological Service (STS) Ltd. , Sofia , Bulgaria.
Scientific Technological Service (STS) Ltd. , Sofia , Bulgaria ; Department of Cell Biology, Histology and Embryology, and Department of Biochemistry, Faculty of Biology, Sofia University 'St. Kliment Ohridsky' , Sofia , Bulgaria.
Biotechnol Biotechnol Equip. 2014 Mar 4;28(2):184-191. doi: 10.1080/13102818.2014.907037. Epub 2014 Jul 18.
The concept of pluripotency as a prerogative of cells of early mammal embryos and cultured embryonic stem cells (ESC) has been invalidated with the advent of induced pluripotent stem cells. Later, it became clear that the ability to generate all cell types of the adult organism is also a questionable aspect of pluripotency, as there are cell types, such as germ cells, which are difficult to produce from pluripotent stem cells. Recently it has been proposed that there are at least two different states of pluripotency; namely, the naïve, or ground state, and the primed state, which may differ radically in terms of timeline of existence, signalling mechanisms, cell properties, capacity for differentiation into different cell types, etc. Germ-like male and female rodent cells have been successfully produced from ESC and induced pluripotent stem cells. The attempts to derive primate primordial germ cells (PGC) and germ cells from pluripotent stem cells, however, still have a low success rate, especially with the female germline. The paper reviews the properties of rodent and primate ESC with regard to their capacity for differentiation to germ-like cells, outlining the possible caveats to derivation of PGC and germ cells from primate and human pluripotent cells.
随着诱导多能干细胞的出现,多能性作为早期哺乳动物胚胎细胞和培养的胚胎干细胞(ESC)的一种特权这一概念已被推翻。后来,人们清楚地认识到,产生成体生物体所有细胞类型的能力也是多能性中一个值得质疑的方面,因为存在一些细胞类型,如生殖细胞,很难从多能干细胞中产生。最近有人提出,多能性至少有两种不同的状态;即原始态或基础态,以及始发态,它们在存在的时间线、信号传导机制、细胞特性、分化为不同细胞类型的能力等方面可能有根本差异。已成功从胚胎干细胞和诱导多能干细胞中产生了类生殖的雄性和雌性啮齿动物细胞。然而,从多能干细胞中获得灵长类原始生殖细胞(PGC)和生殖细胞的尝试成功率仍然很低,尤其是在雌性生殖系方面。本文综述了啮齿动物和灵长类胚胎干细胞在分化为类生殖细胞方面的特性,概述了从灵长类和人类多能细胞中获得原始生殖细胞和生殖细胞可能存在的问题。