通过蛋白质稳定机制调节p38 MAPK信号,支持生长和衰老期间的组织完整性
Wang Yuan1, Yi M Weaver1, Svetlana Earnest1
1Department of Pharmacology, UT Southwestern Medical Center, Dallas, TX, USA.
Nature communications
|July 28, 2023
概括
p38 MAPK信号传递,特别是C. elegans中的PMK-1,通过调节非化PMK-1水平,促进长寿和神经元完整性,在衰老过程中动态支持组织平衡.
科学领域:
- 细胞生物学 细胞生物学
- 衰老研究研究 衰老研究
- 分子信号传输的方法
背景情况:
- 这种p38 MAPK通路对于应激反应至关重要,C. elegans中的PMK-1调节免疫和发育.
- 过度激活PMK-1可以对生物体的健康产生负面影响.
- 衰老与细胞压力和组织功能下降有关.
研究的目的:
- 研究PMK-1信号在衰老中的作用及其对组织完整性和寿命的影响.
- 为了阐明PMK-1信号在衰老过程中被调节的机制.
- 确定增强PMK-1信号是否可以减轻与年龄相关的衰退.
主要方法:
- 利用C. elegans作为一个模型生物体.
- 在老化过程中研究了PMK-1酸化和非酸化形式.
- 采用了基因操纵,包括创建抗卡斯帕斯分裂的PMK-1突变体.
- 评估神经元完整性,溶酶体功能和寿命.
主要成果:
- 在早期衰老期间,通过改变非基PMK-1的固态度来增强PMK-1信号传递,从而促进组织完整性和寿命.
- 丧失pmk-1功能加速神经元和溶酶体衰退,缩短寿命.
- 在CED-3中,卡斯帕斯分裂限制了化PMK-1.
- 通过抗裂变的PMK-1来增强p38信号传递,可以保持淋巴体和神经元的健康,延长年轻人的功能.
- 通过转录程序,PMK-1调节溶酶体的形成.
结论:
- 调节非-PMK-1的固态度,可以在衰老过程中动态地支持组织平衡,而不会引发压力反应的过度激活.
- PMK-1信号传递在维持神经元和溶酶体完整性方面发挥着关键作用,从而影响长寿.
- 针对PMK-1静脉测量提供了一种促进健康衰老的潜在策略.
更多相关视频
09:29Isolation of Intermediate Filament Proteins from Multiple Mouse Tissues to Study Aging-associated Post-translational Modifications
Published on: May 18, 2017
8.5K
12:38Using Caenorhabditis elegans as a Model System to Study Protein Homeostasis in a Multicellular Organism
Published on: December 18, 2013
6.1K
相关概念视频
Interactions Between Signaling Pathways
6.3K
Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
6.3K
MAPK Signaling Cascades
5.7K
Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
5.7K
mTOR Signaling and Cancer Progression
3.8K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
3.8K
PI3K/mTOR/AKT Signaling Pathway
3.7K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
3.7K
Abnormal Proliferation
4.6K
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...
4.6K
Regulation of the Unfolded Protein Response
2.5K
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...
2.5K
