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相关概念视频

Replicative Cell Senescence02:15

Replicative Cell Senescence

Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
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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...
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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.
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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.
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Updated: Jun 5, 2026

Conditional Knockdown of Gene Expression in Cancer Cell Lines to Study the Recruitment of Monocytes/Macrophages to the Tumor Microenvironment
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Published on: November 23, 2017

出瘤抑制的分泌物

Yuchen Chien1, Scott W Lowe

  • 1Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.

Cell
|February 13, 2008
PubMed
概括
此摘要是机器生成的。

细胞衰老是一种瘤抑制机制,涉及胰岛素类生长因子结合蛋白7 (IGFBP7). 这种蛋白质在黑色素细胞中调解基因诱导的衰老,并在黑色素瘤细胞中触发亡,提供了一种新的治疗策略.

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相关实验视频

Last Updated: Jun 5, 2026

Conditional Knockdown of Gene Expression in Cancer Cell Lines to Study the Recruitment of Monocytes/Macrophages to the Tumor Microenvironment
10:59

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科学领域:

  • 在瘤学瘤学.
  • 细胞生物学 细胞生物学
  • 分子医学是分子医学.

背景情况:

  • 细胞衰老是一种关键的瘤抑制机制,它限制了受损细胞的增殖.
  • 瘤基因突变,如BRAF,可以破坏正常的细胞过程,导致癌症的发展.

研究的目的:

  • 为了确定与正常黑色素细胞的瘤基因诱导衰老有关的分泌因素.
  • 研究这些因素在黑色素瘤进展中的作用,并探索潜在的治疗应用.

主要方法:

  • 利用基因表达分析和蛋白质组技术来识别分泌的蛋白质.
  • 采用了正常黑色素细胞和黑色素瘤的细胞培养模型.
  • 研究了鉴定因素对衰老诱导和亡的影响.

主要成果:

  • 确定了胰岛素类生长因子结合蛋白7 (IGFBP7) 作为一种由瘤性BRAF在正常黑色素细胞中诱导的衰老的分泌因子.
  • 证明IGFBP7在已经超越衰老的黑色素瘤细胞中触发了亡.

结论:

  • IGFBP7 是一种新型的调解器,在黑色素细胞中促进癌基因诱导的衰老.
  • 通过诱导癌细胞的亡,IGFBP7代表了黑色素瘤治疗的潜在治疗标.