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相关概念视频

The Intrinsic Apoptotic Pathway01:31

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Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
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Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
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The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
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The Power of Simplicity: Sea Urchin Embryos as in Vivo Developmental Models for Studying Complex Cell-to-cell Signaling Network Interactions
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血小板激活因子在发育中的海胚胎中调节了亡基因表达.

Shohom Saha1, Aaron Cho1, Caroline Smith1

  • 1Department of Biomedical Sciences, University of South Carolina School of Medicine Greenville, Greenville, SC, United States.

Frontiers in cell and developmental biology
|February 19, 2026
PubMed
概括

血小板激活因子 (PAF) 通过改变亡基因表达来影响早期海的发育. PAF增加了亲细胞灭绝和抗细胞灭绝的基因表达,揭示了胚胎发生过程中的复杂调节.

关键词:
灭症 (apoptosis) 是一种死亡的过程.在每一个阶段.血小板激活因子是什么在海里,海刺是海刺.信号传输 / 信号传输路径

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科学领域:

  • 发育生物学 发展生物学
  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.

背景情况:

  • 早期胚胎发育需要精确的基因表达调节.
  • 海胚胎是研究胚胎发生的一个有价值的模型,因为它们的可访问性和可复制性.
  • 血小板激活因子 (PAF) 等生长因子在早期胚胎发生过程中调节亡基因表达的作用在很大程度上是未知的.

研究的目的:

  • 研究血小板激活因子 (PAF) 在早期海胚胎中调节亡基因表达中的作用.
  • 分析PAF治疗后关键的亲亡和抗亡基因的表达模式.

主要方法:

  • 使用的 *Lytechinus variegatus* 海胚胎.
  • 使用定量实时聚合酶链反应 (qRT-PCR) 来分析基因表达.
  • 在受精后20分钟间隔收集样品,最长为240分钟.

主要成果:

  • 在所有测量时间点上,PAF治疗导致了亲细胞灭绝性caspase基因 (CASP3,CASP7,CASP8) 的表达增加.
  • 此外,PAF还诱导了抗亡基因 (BCL2A1,NFKBIA,NFKBIZ) 双相增加的表达.

结论:

  • 血小板激活因子 (PAF) 在早期海发育期间调节亡基因表达方面发挥着重要作用.
  • 存在复杂的调节机制,以平衡亡机械的功能,并防止早期胚胎发生过程中的过度细胞死亡.