関連する実験動画
Updated: Sep 21, 2025

08:00
Bone Marrow Transplantation Procedures in Mice to Study Clonal Hematopoiesis
Published on: May 26, 2021
13.0K
クローナルの血液形成の縦断的動態と自然史
Margarete A Fabre1,2,3, José Guilherme de Almeida4, Edoardo Fiorillo5
1Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, UK.
Nature
|June 1, 2022
まとめ
肉体の変異はクローナル血液形成を促し,年齢とともに組織に広がります. この研究では 異なる生涯のクローン行動と 変異特有の成長率が明らかになり 急速な拡大と 高い悪性腫瘍のリスクが関連しています
科学分野:
- 血液学
- 遺伝学
- 老化に関する研究
背景:
- 身体変異によって引き起こされるクローン拡張は,クローン血液形成として知られており,老化した個体では一般的です.
- クローン性血液形成の発達,行動,および老化と癌の進行との関係に関する理解は限られている.
研究 の 目的:
- 生涯に渡る自然史を理解するために クローナルの血液形成を追跡する.
- クローン成長率とパターンを影響する要因を調査する.
- クロンの拡大と悪性発症の関係を見極めるため
主な方法:
- 385人 (≥55歳) の697人のクローナルの血液形成を平均13年にわたって追跡した.
- 7人の高齢者の血液形成コロニーの1731の全ゲノム配列の系統分析.
- 変異特有のクローン成長率と拡張タイミングの分析.
主要な成果:
- 92. 4%のクローンは安定した指数関数的な成長を示し,変異タイプが著しく割合に影響を与えた (例えば,SRSF2P95H>>>50%/年,DNMT3A/TP53>5%/年).
- 生涯に渡る異なるクローン行動が観察されました. DNMT3A変異のクローンは早期に拡大し,後に遺伝子変異を組み込み,TET2変異のクローンはすべての年齢で出現しました.
- 速度の高いクローン成長は悪性病の進行リスクの増加と関連していました.
結論:
- クローン性血液形成は,突然変異の種類と年齢によって影響される多様な生涯にわたる自然経歴を示します.
- これらのダイナミクスを理解することで,体内の変異,老化,クローン選択,癌のリスクに関する重要な洞察が得られます.
関連する概念動画
Hematopoiesis
5.7K
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...
5.7K
Overview of Hematopoiesis
4.9K
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...
4.9K
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
Lineage Commitment
3.3K
Commitment is the process whereby stem cells:
3.3K
Production of Formed Elements
1.8K
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...
1.8K

