訓練された免疫のための貯蔵庫としての血液形成性幹細胞と原始細胞
Brandon T Tran1,2, Vidthiya Jeyanathan3, Ruoqiong Cao1,4
1Department of Pediatrics, Division of Infectious Diseases, and Stem Cells and Regenerative Medicine Center, Baylor College of Medicine and Texas Children's Hospital, Houston, United States.
eLife
|September 4, 2025
まとめ
生まれつきの免疫細胞は 病原体を何年も記憶し 長生きした幹細胞は この記憶を保存します この"訓練された免疫"は,血液形成性幹細胞と原始細胞 (HSPC) で表遺伝的にコード化されています.
科学分野:
- 免疫学
- エピジェネティクス
- ヘマトポエシス
背景:
- 生まれつきの免疫細胞は炎症後の病原体に対する反応が強くなっています.
- 生まれながらの免疫記憶は 数ヶ月から数年間も存続し 生まれながらの細胞の寿命を超えています
- 長生きする血液形成性幹細胞と親細胞 (HSPCs) は,先天的な免疫記憶の貯蔵庫です.
研究 の 目的:
- HSPCにおける先天性免疫記憶のエピジェネティック・エンコーディングの証拠を検証する.
- HSPCにおける集中訓練された免疫の基礎となるメカニズムを探る.
- 臨床環境における訓練された免疫の影響と将来の戦略について議論する.
主な方法:
- ヒトとマウスの既存の研究のレビュー
- HSPCにおける表遺伝的メカニズムの分析
- HSPCの差別化と再プログラミングの探索
主要な成果:
- 本来の免疫記憶は HSPCで表遺伝的にコードされています
- HSPCのサブ集団と細胞自律的再プログラムが,訓練された免疫に寄与する.
- 中央の訓練された免疫は,様々な医療分野に重要な意味を持っています.
結論:
- 生まれながらの免疫記憶は,HSPC内の安定した,表遺伝的に調節される現象です.
- HSPCの訓練された免疫を理解することは,幹細胞移植,老化,ワクチン開発に不可欠です.
- 将来の研究は 訓練された免疫を 治療上の利益のために活用することに焦点を当てるべきです
関連する概念動画
Multipotency of Hematopoietic Stem Cells
3.3K
The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...
3.3K
Regulation of Hematopoietic Stem Cells
3.3K
All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
3.3K
Cells of the Adaptive Immune Response
4.0K
The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
4.0K
Hematopoiesis
5.6K
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...
5.6K
Production of Formed Elements
1.7K
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...
1.7K
Lineage Commitment
3.1K
Commitment is the process whereby stem cells:
3.1K


