硬质瘤衍生的PDGF信号功能作为一个利基线索,负责原始的红色素形成
Aihua Mao1, Zhuyun Li2,3, Guozhu Ning4
1Guangdong Provincial Key Laboratory of Marine Biotechnology , Institute of Marine Sciences, Shantou University, Shantou, Guangdong 515063, China.
概括
血小板衍生生长因子 (PDGF) 信号传递对于斑马鱼胚胎的原始红细胞发育至关重要. 这项研究确定了来自硬质瘤细胞的PDGF信号作为红色素原体分化的关键利基线索.
科学领域:
- 发展生物学 发展生物学
- 血液形成 血液形成 血液形成
- 细胞信号传递 细胞信号传递
背景情况:
- 原始的红色素形成对于胚胎的氧气运输至关重要.
- 调节原始血液形成的微环境尚未得到充分理解.
- 确定的血液形成涉及不同的利基因素.
研究的目的:
- 为了研究血小板衍生生长因子 (PDGF) 信号在斑马鱼原始红色形成中的作用.
- 在这个过程中识别PDGF信号的源和目标细胞.
- 为了阐明下游涉及的信号通路.
主要方法:
- 斑马鱼中pdgfaa和pdgfab的基因切除.
- 使用药理剂抑制PDGF信号传递.
- 硬质瘤特异性基因过度表达.
- 红色素原体分化和红细胞数量的分析.
- 在ERK1/2信号通路分析.
主要成果:
- 切除pdgfaa/pdgfab或PDGF抑制显著降低了红色素原体的分化和红细胞数量.
- pdgfαb在硬质瘤细胞中表达,其受体 (pdgfra,pdgfrb) 位于红色素原体中.
- 硬质瘤特异性pdgfαb过度表达在突变胚胎中挽救了原始的红色素形成.
- 确定ERK1/2信号是PDGF信号的下游效应因子.
结论:
- 来自硬质瘤细胞的PDGF信号作为斑马鱼原始红色素形成的关键利基线索.
- 这种信号通路对于胚胎发育期间的红原体分化至关重要.
- 这些发现揭示了一种新的机制,调节了早期的血细胞形成.
相关概念视频
Role of Hematopoietic Growth Factors
1.4K
Hematopoietic growth factors are molecules that regulate the differentiation rate of hematopoietic stem cells (HSCs). Erythropoietin (EPO), primarily produced by the kidneys, plays a crucial role in erythrocyte production. When oxygen levels in the blood are low, EPO is released into the bloodstream, reaching the bone marrow, where it stimulates HSCs to differentiate and mature into erythrocytes, which are vital for oxygen transport.
Thrombopoietin (TPO), mainly released by the liver,...
Thrombopoietin (TPO), mainly released by the liver,...
1.4K
Hematopoiesis
5.3K
The process of blood cell formation is called hematopoiesis. Hematopoiesis starts early during development, on the seventh day of embryogenesis. This phase of hematopoiesis is called the primitive wave, wherein the extraembryonic yolk sac allows the production of erythroid cells and endothelial cells from a common precursor called hemangioblast. The erythroid cells provide oxygen to support the growth of the rapidly dividing embryo. Hemangioblasts later develop into hematopoietic stem cells or...
5.3K
Erythropoiesis
4.3K
Red blood cells (RBCs) transport oxygen to all body tissues. These cells survive only for 120 days and then need to be replenished. Erythropoiesis is the process of RBC production. In healthy individuals, erythropoiesis ensures all tissues are amply supplied with oxygen. In addition, blood loss due to injury leads to a drop in the physiological oxygen level that will cause erythropoiesis. Any defect in erythropoiesis leads to several physiological disorders, including thalassemia, anemia,...
4.3K
Production of Formed Elements
1.4K
Hemangioblasts are multipotent stem cells originating from the mesoderm. They give rise to hematopoietic stem cells (HSCs), which undergo hematopoiesis to produce all the formed elements of blood. This process is regulated by a complex network of hematopoietic growth factors, including transcription factors, growth factors, and cytokines. These factors stimulate the HSCs to divide and differentiate, though some HSCs remain undifferentiated to maintain a self-renewing pool.
Most HSCs commit to...
Most HSCs commit to...
1.4K
Regulation of Angiogenesis and Blood Supply
2.6K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
2.6K
Overview of Hematopoiesis
4.1K
Hematopoiesis, or blood cell production, is a vital biological process that begins early in embryonic development and continues throughout life. This process generates the various types of cells found in blood, including red blood cells, white blood cells, and platelets from hematopoietic stem cells (HSCs).
Developmental Phases of Hematopoiesis
Initially, HSCs are formed in the embryonic yolk sac, a critical site for early blood cell production. These stem cells subsequently migrate to other...
Developmental Phases of Hematopoiesis
Initially, HSCs are formed in the embryonic yolk sac, a critical site for early blood cell production. These stem cells subsequently migrate to other...
4.1K


