EphB4の液体-液体相分離は,YAPの活性化によって肺高血圧を誘発する
Jia-Yu Liu1, Jing Chen1, Qin-Ye Chen1
1Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Fujian Medical University, Fuzhou 350122, China.
Cell reports
|February 14, 2026
まとめ
肺高血圧 (PH) は,血管の硬化を伴う. 研究者らは,Eph受容体B4 (EphB4) が細胞の成長を促すことでこれを誘発し,PHに対する新しい治療標的を提供することを発見した.
科学分野:
- バイオケミストリー バイオケミストリー
- 分子生物学は分子生物学である.
- 心血管研究 循環器科の研究
背景:
- 血管細胞外マトリックス硬化は,肺高血圧 (PH) の重要な要因です.
- PHにおけるマトリックス硬化と細胞機能不全を結びつける正確なメカニズムは完全に理解されていません.
- 肺動脈の滑らかな筋肉細胞 (PASMCs) はPHの病原化において重要な役割を果たします.
研究 の 目的:
- PASMCsにおける硬さ誘発細胞応答の主要なメディエーターを特定する.
- 肺高血圧の発症におけるEph受容体B4 (EphB4) の役割を明らかにする.
- PHの潜在的な治療目標としてEphB4相分離を調査する.
主な方法:
- PHモデルにおけるEphB4発現を調査した.
- マトリックス硬化とPHのインビトロおよびインビボモデルを使用した.
- 液体-液体相分離 (LLPS) でのEphB4の本質的に乱れた領域 (IDR) の役割を分析した.
- ナノ粒子を介して送られるEphB4 IDRを標的としたレトロリバースペプチドを開発し,テストしました.
主要な成果:
- EphB4はPHの調節を向上させ,その欠乏はネズミのPHを改善した.
- マトリックス硬化は,YAP調節タンパク質 (ANXA2,YWHA) を隔離するEphB4 LLPSを誘発した.
- このプロセスは,YAPの保持を妨害し,核の移転とPASMCの拡散を促進しました.
- ペプチドでEphB4 IDRを標的にすると,LLPSが抑制され,PHの進行が弱まります.
結論:
- EphB4は,PHにおける硬さ誘発のPASMC増殖の重要な媒介として作用する.
- EphB4駆動のLLPSと,その後のYAP活性化が,PHにおける新たな病理的軸を形成する.
- EphB4相分離を阻害することは,肺高血圧の有望な治療戦略です.
関連する概念動画
Molecular Comparison of Gases, Liquids, and Solids
55.8K
Particles in a solid are tightly packed together (fixed shape) and often arranged in a regular pattern; in a liquid, they are close together with no regular arrangement (no fixed shape); in a gas, they are far apart with no regular arrangement (no fixed shape). Particles in a solid vibrate about fixed positions (cannot flow) and do not generally move in relation to one another; in a liquid, they move past each other (can flow) but remain in essentially constant contact; in a gas, they move...
55.8K
Pulmonary Hypertension: Classification and Pathogenesis
673
Pulmonary hypertension (PH) is a severe health condition in which the mean pulmonary arterial pressure increases to 25 mmHg or more, even when the body is at rest. This high pressure in the blood vessels that transport blood from the heart to the lungs can cause various symptoms, including shortness of breath, can lead to right heart failure, and significantly affect the overall quality of life.
There are various classifications for PH, each relating to different underlying causes and also...
There are various classifications for PH, each relating to different underlying causes and also...
673
Rise of Liquid in a Capillary Tube
3.3K
When very thin cylindrical tubes, called capillaries, are dipped in a liquid, the liquid rises or falls in the tube compared to the surrounding liquid. This phenomenon is called capillary action. Capillary action occurs due to the combination of two opposing forces: the cohesive forces of the liquid, which cause it to stick to itself and form a rounded shape, and the adhesive forces between the liquid and the walls of the container, which cause the liquid to be attracted to the container walls.
3.3K
Deriving the Speed of Sound in a Liquid
986
As with waves on a string, the speed of sound or a mechanical wave in a fluid depends on the fluid's elastic modulus and inertia. The two relevant physical quantities are the bulk modulus and the density of the material. Indeed, it turns out that the relationship between speed and the bulk modulus and density in fluids is the same as that between the speed and the Young's modulus and density in solids.
The speed of sound in fluids can be derived by considering a mechanical wave...
The speed of sound in fluids can be derived by considering a mechanical wave...
986
High-Performance Liquid Chromatography: Introduction
3.6K
High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
In HPLC, two phases play a critical role in the separation process:
3.6K
High-Performance Liquid Chromatography: Instrumentation
3.1K
High-performance liquid chromatography, or HPLC, is an analytical technique that separates liquid samples under high pressures. An HPLC instrument consists of glass bottles for storing solvents called mobile phase reservoirs. HPLC-grade solvents are used to maintain high purity, and the dissolved gases are removed using a degasser, such as a vacuum pumping system or sparging with helium. The solvents are then pumped into the analytical column using a screw-driven syringe or reciprocating pumps.
3.1K


