阿尔法1抗素对内分体TLR信号通路的抑制作用
Ahmed S Elshikha1,2, Georges Abboud2, Rigena Avdiaj1
1Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA.
Biomolecules
|January 25, 2025
概括
人类α1抗素 (hAAT) 抑制7号,8号和9号类似收费受体 (TLRs),在全身性红斑狼 (SLE) 发病过程中至关重要. 这种蛋白酶抑制剂减少了免疫细胞激活和致病途径,为狼提供了潜在的治疗见解.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 类风湿病学 类风湿病学
背景情况:
- 内体细胞类似受体 (TLRs) 7,8和9都与系统性红斑狼 (SLE) 的发病有关.
- 这些TLR的蛋白质分解处理对于它们的信号传递至关重要.
- 人类α1抗素 (hAAT) 是一种具有已知的抗炎作用的蛋白酶抑制剂,但其对内体TLR的影响尚不清楚.
研究的目的:
- 研究HaaAT对TLR7,TLR8和TLR9信号通路的影响.
- 探索 hAAT作为一种治疗剂的潜力,以针对SLE中TLR介导的发病因子.
主要方法:
- 在体外研究中,使用用HaaT和TLR激动剂 (TLR9联体,TLR7/8的R848) 治疗的树突细胞 (DC).
- 西部斑点分析以评估切割的TLR9表达.
- 在体内研究中,使用HaaT转基因小鼠进行了R848.8的挑战.
主要成果:
- hAAT抑制了TLR9介导的DC激活,细胞因子产生和干扰素特征基因表达.
- hAAT降低了DCs中活跃 (分裂) TLR9的表达.
- 哈特还抑制了R848诱导的TLR7/8信号在DCs和减弱了R848诱导的病原发生在哈特转基因小鼠,包括阻断关键的免疫细胞群涉及狼.
结论:
- hAAT有效地抑制了TLR7/8和TLR9信号通路.
- hAAT通过降低TLR9.9的活性形式来证明一种新的作用机制.
- 这些发现支持 hAAT在治疗SLE和其他TLR介导的炎症性疾病方面的潜在临床应用.
更多相关视频
07:09Myeloid Innate Signaling Pathway Regulation by MALT1 Paracaspase Activity
Published on: January 7, 2019
7.4K
15:55Long-term Silencing of Intersectin-1s in Mouse Lungs by Repeated Delivery of a Specific siRNA via Cationic Liposomes. Evaluation of Knockdown Effects by Electron Microscopy
Published on: June 21, 2013
10.6K
相关概念视频
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
Receptor Downregulation in MVBs
2.0K
Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
2.0K
Enzyme-linked Receptors
77.1K
Enzyme-linked receptors are proteins that act as both receptor and enzyme, activating multiple intracellular signals. This is a large group of receptors that include the receptor tyrosine kinase (RTK) family. Many growth factors and hormones bind to and activate the RTKs.
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
77.1K
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
