カスパース-1の活性化により,血管内溶解における血管炎症プロセスと低血流が発生する
Pamela L Brito1, Lucas F S Gushiken1, Erica M F Gotardo1
1Hematology and Transfusion Center, University of Campinas - UNICAMP, Campinas. São Paulo, Brazil. 13083-878.
American journal of physiology. Heart and circulatory physiology
|September 5, 2025
まとめ
血管内溶解は,カスパース-1の活性化によって炎症を引き起こし,血流の障害と白血球の徴集につながります. カスパース-1を標的とした治療は,血液溶解に関連した血管損傷を治療することができます.
科学分野:
- 免疫学
- 血管生物学
- 病理生理学
背景:
- 血管内溶解 (IVH) は炎症を引き起こすが,血管内分子駆動因子は不明である.
- IVH誘発の血管機能不全におけるNLRP3炎症体とカスパース-1経路の役割は,調査が必要である.
研究 の 目的:
- IVH誘発の血管機能不全におけるNLRP3炎症体とカスパース-1の役割を明らかにする.
- 微小血管の血流と白血球の行動に対するIVHの影響を調査する.
主な方法:
- マウスにおける急性および慢性IVHのin vivoモデルを使用した.
- ヘムとカスパース-1ノックアウトマウスで内皮細胞を刺激した.
- 状細胞病のマウスモデルに投与された薬学的カスパース-1阻害剤.
主要な成果:
- IVHは,白血球におけるIL- 1βの迅速な放出とNLRP3- 依存のカスパース- 1の活性化を誘導した.
- 急性IVHではマイクロ血管の血流が低下し,カスパース-1による白血球の徴集が増加した.
- カスパース-1 阻害は,状細胞病のモデルにおけるヘム誘発の血管閉塞を弱めた.
結論:
- カスパース-1の活性化は,IVH誘発の微小血管白血球の徴募と低血流の重要な媒介である.
- カスパースに依存する経路をターゲットにすることで,IVHに関連した血管炎症と組織損傷に対する潜在的な治療戦略を提供します.
関連する概念動画
Caspases
12.7K
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...
12.7K
The Intrinsic Apoptotic Pathway
6.8K
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...
6.8K
The Extrinsic Apoptotic Pathway
6.6K
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...
6.6K
Extrinsic and Intrinsic Pathways of Hemostasis
9.1K
Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...
9.1K
Vascular Spasm
1.8K
The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last...
1.8K
Introduction to Hemostasis
8.9K
Hemostasis is a complex physiological process that prevents excessive bleeding when a blood vessel is injured. It's crucial for maintaining the integrity of the circulatory system, as it ensures that our blood remains fluid while still within the vascular network and yet clots to prevent blood loss upon vessel injury.
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized,...
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized,...
8.9K


