関連する実験動画
Updated: Mar 11, 2026

06:41
Isolation Method for Long-Term and Short-Term Hematopoietic Stem Cells
Published on: May 19, 2023
2.7K
エピジェネティック・メモリは,血球幹細胞のセル・オートノム・ヘテロゲネスな行動の基礎となっている
Vionnie W C Yu1, Rushdia Z Yusuf1, Toshihiko Oki1
1Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02114, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA.
Cell
|November 19, 2016
まとめ
血液形成性幹細胞 (HSC) は,表遺伝的プログラムによって駆動されるクローン特有の機能を示す. この細胞自律性は,組織ホメオスタシスと修復の維持におけるHSCの異質性を強調する.
科学分野:
- 幹細胞生物学
- ヘマトポエシス
- エピジェネティクス
背景:
- 幹細胞は組織ホメオスタシスと修復に不可欠です
- 幹細胞集団における機能的異質性はますます認識されています.
- 幹細胞の異質性を理解することは 再生医療の鍵です
研究 の 目的:
- 造血幹細胞 (HSC) の機能的異質性の範囲と分子基盤を調査する.
- 機能的属性をクローンレベルでの転写および表遺伝的プロファイルと相関させる.
主な方法:
- 血液形成幹細胞 (HSC) の内生光タグを使用した.
- クローンレベルで 機能的,転写的,および表遺伝的属性を重ね合わせる.
- ホメオスタティックおよびストレス条件 (移植,炎症,遺伝子毒性損傷) の下でクローン行動を分析した.
主要な成果:
- 内生性HSCのクローン特有の機能的属性を時間とともに特定した.
- 様々なストレス条件下でのステレオタイプと保存されたクローン内行動を示した.
- 異なる転写,DNAメチル化,およびクロマチンのアクセシビリティパターンにリンクされたHSC機能.
- エピジェネティック構成と相関するHSC機能が観察されましたが,必ずしも転写状態ではありません.
結論:
- 血液形成には,表遺伝的に決定された行動を持つ異質なHSCクローンが含まれます.
- エピジェネティック構成は,HSCの機能と細胞自律性に大きく影響します.
- 研究結果は,幹細胞の可塑性と幹細胞のニッチの概念を洗練する必要性を示唆しています.
関連する概念動画
Multipotency of Hematopoietic Stem Cells
4.1K
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...
4.1K
Lineage Commitment
4.5K
Commitment is the process whereby stem cells:
4.5K
Regulation of Hematopoietic Stem Cells
4.3K
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...
4.3K
Maintenance of the ES Cell State
2.8K
The cells of the blastocyst inner cell mass only remain pluripotent for a short time. This state of pluripotency and self-renewal can be maintained in embryonic stem (ES) cell culture by adding specific chemicals or growth factors to ensure the cells can continue dividing and later differentiate into different cell types. In some cases, the cells are grown on a feeder layer of differentiated cells, which provides the growth factors and extracellular matrix components necessary for stem cell...
2.8K
Inheritance of Chromatin Structures
7.8K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
7.8K
Hematopoiesis
9.5K
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...
9.5K

