高效的巨核形成和血小板生成需要脂重塑和通过CD36吸收PUFA
Maria N Barrachina1,2, Gerard Pernes3, Isabelle C Becker1,2
1Vascular Biology Program, Boston Children's Hospital, Boston, MA, USA.
Nature cardiovascular research
|August 28, 2024
概括
脂肪酸的吸收对于血小板的产生至关重要. 饮食中的多不和脂肪酸 (PUFA) 可以增加血小板数量,而和脂肪会减少血小板数量,提供潜在的治疗点.
科学领域:
- 生物化学 生物化学
- 血液学 血液学 血液学
- 细胞生物学 细胞生物学
背景情况:
- 脂质对细胞膜和血液形成至关重要.
- 脂质在巨细胞形成 (血小板生成) 中的特定作用仍然在很大程度上未被探索.
研究的目的:
- 研究脂质,特别是脂肪酸在巨核细胞分化和血小板产生中的作用.
- 探索食脂肪酸和CD36介导吸收对血小板数的影响.
主要方法:
- 在巨核细胞前代,巨核细胞和血小板中分析脂质组.
- 在体外实验中抑制脂肪酸代谢和吸收的实验.
- 使用不同脂肪酸饮食和CD36淘汰模式的小鼠进行体内研究.
- 对CD36功能丧失突变患者的临床观察.
主要成果:
- 大核细胞和血小板表现出一种独特的脂质组,富含多不和脂肪酸 (PUFA) 含脂.
- 抑制脂肪酸的摄取或合成,损害了巨核细胞的分化和血小板的形成.
- 吃高和脂肪酸饮食的小鼠的血小板数量较低,而富含PUFA的饮食可以逆转这种情况.
- 在小鼠中,CD36的缺失导致了血小板缺血;在患者中,CD36功能丧失突变导致了血小板数量低和出血.
结论:
- 脂肪酸的吸收和调节对于巨核细胞的成熟和血小板的产生至关重要.
- 饮食中的脂肪酸成分显著影响血小板计数.
- CD36是脂肪酸吸收的关键媒介,用于血小板的生产.
- 食脂肪酸的向是调节血小板数量的潜在策略.
相关概念视频
01:18Structure and Function of Platelets
1.1K
The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000...
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000...
1.1K
01:42Phosphoinositides and PIPs
8.5K
Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
8.5K
01:27Synthesis of Phosphatidylcholine in the ER Membrane
3.0K
The ER synthesizes lipids for building cell membranes and performing cellular functions such as energy storage and signaling. The lipid synthesis machinery embedded in the ER membrane primarily collects all reactants from the cytosol. Following synthesis, the secretory pathway and the ER contact sites distribute these lipids to other cellular organelles. Additionally, the energy-rich triacylglycerides are transported from the ER via lipid droplets.
The major components of all eukaryotic cell...
The major components of all eukaryotic cell...
3.0K
01:28Assembly of the Lipid Bilayer in the ER
3.1K
Biological membranes are more than just a barrier separating cell cytoplasm from the outside environment. They are highly dynamic and help maintain the integrity and physiological stability of the cells as well as membrane-bound organelles. Membranes also play vital roles in cell-to-cell and intracellular communication.
A large chunk of any biological membrane is composed of phospholipids. These lipids have a heterogeneous distribution across different subcellular organelles and even between...
A large chunk of any biological membrane is composed of phospholipids. These lipids have a heterogeneous distribution across different subcellular organelles and even between...
3.1K
01:22Formation of the Platelet Plug
5.3K
The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
5.3K
01:31Lipid-derived Compounds in the Human Body
4.3K
Fats and lipids are crucial components in the human body. Some lipid-derived compounds, such as fat-soluble vitamins, eicosanoids, lipoproteins, and glycolipids, also play unique roles to support various biological processes .
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin,...
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin,...
4.3K