相关实验视频
Updated: May 26, 2025

08:44
Activating Autophagy by Aerobic Exercise in Mice
Published on: February 3, 2017
11.9K
一类PI3Ks激活状网状细胞中伸展诱导的自
Myoung Sup Shim1, Ethan J Sim1, Kevin Betsch1
1Department of Ophthalmology, Duke Eye Center, Duke University, AERI Bldg, Office 4004, Erwin, Rd. Box 3802, Durham, NC, 27713, USA.
Cellular and molecular life sciences : CMLS
|February 22, 2025
概括
类IA的PI3K和INPP4A/B调节人体带网状细胞的自,维持眼内压力 (IOP) 恒常性. 这一发现揭示了IOP调节和青光眼预防的分子机制.
科学领域:
- 眼科医生 眼科 眼科
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 眼内压升高 (IOP) 是青光眼的主要风险因素,是不可逆转失明的主要原因.
- IOP平衡取决于通过状网 (TM) /施莱姆运河 (SC) 途径的水性幽默排水.
- 机械力和依赖于初级毛 (PC) 的自在IOP恒温中发挥作用,但上游调节者尚不清楚.
研究的目的:
- 为了研究人类TM细胞在循环机械拉伸 (CMS) 期间控制自激活的上游信号通路.
- 阐明IOP恒温的基础分子机制.
主要方法:
- 对初级培养的人类TM细胞进行生物化学和细胞生物学分析.
- 研究了IA,II和III类PI3Ks (氨基酸3-激酶) 的作用.
- 研究了PIK3CA的局部化和INPP4A/B (伊诺西多酸-4-酸酶) 的功能.
主要成果:
- 人类TM细胞表达IA类PI3K催化子单元 (PIK3CA,PIK3CB,PIK3CD).
- 抑制IA类PI3Ks,但不是II或III类,阻止了CMS诱导的自.
- PIK3CA局限于初级眼,而IA类PI3Ks与INPP4A/B一起作用,调节PI3,4) P2和PI3) P水平,这对于伸展诱导的自至关重要.
结论:
- 与INPP4A/B协调的IA类PI3Ks是TM细胞机械拉伸反应中自的关键调节者.
- 这一途径对于维持内脉平衡至关重要.
- 这些发现加深了对IOP调节中的分子机制和潜在的玻璃眼治疗点的理解.
相关概念视频
PI3K/mTOR/AKT Signaling Pathway
3.4K
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...
3.4K
The JAK-STAT Signaling Pathway
8.6K
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...
8.6K
mTOR Signaling and Cancer Progression
3.7K
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...
3.7K
IP3/DAG Signaling Pathway
11.8K
Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and...
11.8K
MAPK Signaling Cascades
5.1K
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...
5.1K
TGF - β Signaling Pathway
7.2K
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...
7.2K

