RIPK1 阻断了由 caspase-8 和 RIPK3 介导的早期产后死亡率
Christopher P Dillon1, Ricardo Weinlich1, Diego A Rodriguez1
1Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
Cell
|May 13, 2014
概括
受体相互作用蛋白激酶1 (RIPK1) 缺乏导致致死性,但将RIPK1和RIPK3淘汰与caspase-8或FADD删除相结合,可以生存. RIPK1调节细胞死亡途径,影响炎症和亡.
科学领域:
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 受体相互作用蛋白激酶1 (RIPK1) 是细胞死亡和炎症的关键调节者.
- 对RIPK1的基因切除导致产后死亡,这表明它在生命早期发挥了关键作用.
- 在各种细胞死亡途径中RIPK1的精确功能,包括RIPK3依赖和RIPK3独立的信号传递,需要进一步阐明.
研究的目的:
- 研究RIPK1在产后存活中的复杂作用及其与其他细胞死亡调节者的相互作用.
- 澄清RIPK1在RIPK3依赖和RIPK3独立信号通路中的参与.
- 了解RIPK1是如何调节TNFR诱导的亡和亡的.
主要方法:
- 生产和分析缺乏RIPK1,RIPK3,caspase-8,FADD和TNFR1.1.的转基因小鼠模型.
- 在体外研究以评估RIPK1在卡斯帕-8依赖性亡中的功能.
- 研究细胞死亡信号通路,包括亡,由多种刺激引发,如多I:C和干扰素.
- 对破坏托尔类受体 (TLR) 和I型干扰素 (IFNAR) 信号传递对致死率的影响的分析.
主要成果:
- 缺少RIPK1,RIPK3和caspase-8或FADD的小鼠存活到成年,与仅缺少RIPK1的小鼠不同.
- 发现RIPK1在体外限制了卡斯帕-8依赖的亡.
- 缺少RIPK1,RIPK3和TNFR1的动物存活到成年,这表明RIPK1在TNFR1中介死亡率中的作用.
- RIPK1似乎抑制了产后的RIPK3激活,因为RIPK3缺乏会加剧RIPK1缺乏小鼠的死亡率.
- 缺乏RIPK1使细胞对由多I:C或干扰素诱导的亡敏感,尽管TNFR诱导的亡需要RIPK1.
- 干扰TRIF或IFNAR信号延迟了RIPK1和TNFR1双淘汰赛小鼠的死亡率.
结论:
- RIPK1在调节细胞死亡和炎症方面发挥着多方面的作用,这对于产后生存至关重要.
- RIPK1,RIPK3,caspase-8和FADD之间的相互作用对于防止与RIPK1缺乏相关的致死性至关重要.
- RIPK1作为一个关键的检查点,抑制RIPK3介导的致死性,调节亡信号通路.
- 这些发现为RIPK1.1对FADD-caspase-8和RIPK3-MLKL信号的复杂调节提供了重要的见解.
更多相关视频
08:55Characterization of MLKL-mediated Plasma Membrane Rupture in Necroptosis
Published on: August 7, 2018
10.1K
09:15Tyramide Signal Amplification for the Immunofluorescent Staining of ZBP1-Dependent Phosphorylation of RIPK3 and MLKL After HSV-1 Infection in Human Cells
Published on: October 20, 2022
2.4K
相关概念视频
The Extrinsic Apoptotic Pathway
6.2K
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...
6.2K
Caspases
8.7K
Caspase, a family of cysteine proteases, serve as effectors in apoptosis. The ced3 gene in C.elegans was first identified to be involved in apoptosis. This gene encodes the ced-3 caspase that is similar to the interleukin-1-beta converting enzyme or ICE in mammals. In addition to apoptosis, caspases also function in the inflammatory response. Inflammatory caspases are essential in activating pro-inflammatory cytokines that recruit immune cells and block the replication of pathogens inside...
8.7K
Regulation of the Unfolded Protein Response
2.2K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
2.2K
Necrosis
5.2K
Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
5.2K
The JAK-STAT Signaling Pathway
10.1K
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
10.1K
The Intrinsic Apoptotic Pathway
6.2K
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...
6.2K
