相关实验视频
Updated: Jun 19, 2026
11:37
In vitro Enrichment of Ovarian Cancer Tumor-initiating Cells
Published on: February 18, 2015
林28在原始生殖细胞发育和生殖细胞恶性瘤中的作用
Jason A West1, Srinivas R Viswanathan, Akiko Yabuuchi
1Division of Pediatric Hematology/Oncology, Children's Hospital Boston and the Dana-Farber Cancer Institute, MA 02115, USA.
Nature
|July 7, 2009
概括
林28对原始生殖细胞 (PGC) 发育至关重要,调节Blimp1和let-7通路. 这项研究建立了一个体外系统,以发现参与生殖细胞发育和癌症的基因.
科学领域:
- 发育生物学 发展生物学
- 干细胞生物学 干细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- 原始生殖细胞 (PGC) 对于繁殖至关重要,但在早期胚胎中很罕见,很难研究.
- 识别PGC规范的分子调节剂对于理解生殖细胞发育和相关疾病至关重要.
研究的目的:
- 用小鼠胚胎干细胞开发一个体外系统来研究PGC特异性.
- 确定参与PGC发育的新型基因及其作用机制.
主要方法:
- 微分化的小鼠胚胎干细胞与一颗恒星转基因记者成假定的PGCs在体外.
- 使用抑制性RNA用于候选基因选.
- 分析了体外衍生细胞的转录形状和DNA印记.
- 研究了Lin28和Blimp1在PGC发展中的作用.
主要成果:
- 在体外衍生 Stella 细胞中,胚胎衍生 PGC 在转录形状和印记删除中反映.
- 确定Lin28对于PGC发育至关重要,它调节了let-7微RNA处理.
- Blimp1,一个let-7目标,拯救了Lin28的缺陷,阐明了Lin28的机制.
- 林28的过度表达增强了PGC在体外和基马胚胎中的形成,并与人类生殖细胞瘤有关.
结论:
- 试管体差异化系统为研究早期性球体发育提供了一个可访问的模型.
- 通过Blimp1-let-7监管轴,Lin28在PGC规范中发挥着至关重要的作用.
- 这项研究提供了对生殖细胞发育,恶性瘤和潜在治疗点的见解.
相关概念视频
01:23Negative Regulator Molecules
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
02:23Abnormal Proliferation
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
01:12Loss of Tumor Suppressor Gene Functions
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
01:05Cancer-Critical Genes II: Tumor Suppressor Genes
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...