ERG相分離は,細胞の老化を弱める

Lu Pu^1,2, Zhiliang Zuo^3,4,5, Hui Zheng⁶

¹Laboratory for Aging and Cancer Research, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China.

iScience

|February 18, 2026

まとめ

百歳以上の人は,長寿に関連したユニークなクロマチンのアクセシビリティを示しています. 転写因子ERGは,相分離によって細胞の老化を調節し,老化を減らし,極端な老年期における回復力を促進する.

科学分野:

ゲノミクスゲノミクスとは
エピジェネティクスエピジェネティクス
細胞生物学細胞生物学

背景:

センテリアンは,健康的な老化メカニズムについての洞察を提供します.
長寿の分子基盤を理解することは,介入の開発に不可欠です.

研究の目的:

百歳児の例外的な長寿に関連した表遺伝的および分子的要因を特定する.
細胞の老化と衰老における転写因子ERGの役割を調査する.

主な方法:

百歳以上の人々からの外周血液単核細胞のATAC-seqとトランスクリプトミックのプロファイリング.
重要な規制当局を特定するための統合的なバイオインフォマティクス分析.
ERGの生体物理的性質と老化への影響を評価するために,ヒト細胞での機能研究.

主要な成果:

異なったクロマチンのアクセシビリティの風景は,百歳児で特定されました.
転写因子ERGは長寿に関連するレギュレータとして強調されました.
ERGは,液体-液体相分離によって核凝縮体を形成し,老化に関連する遺伝子発現 (例えば,CDKN2A) を減少させ,細胞老化フェノタイプを弱体化させます.

結論:

百歳代の人の表遺伝子学的特徴は,転写因子の生体物理的性質と関連しています.
ERGの液相分離は,細胞の老化を制御する新しい規制メカニズムです.
段階分離は,細胞の回復力と長寿に寄与する可能性があります.

キーワード:

生物物理化学化学染色体組織は染色体組織である.医学生化学医学生化学について

さらに関連する動画

13:59

A Quantitative Measurement of Reactive Oxygen Species and Senescence-associated Secretory Phenotype in Normal Human Fibroblasts During Oncogene-induced Senescence

Published on: August 12, 2018

8.6K

06:51

Techniques to Induce and Quantify Cellular Senescence

Published on: May 1, 2017

35.2K

関連する概念動画

02:15

Replicative Cell Senescence

4.5K

Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds...

4.5K

01:27

Molecular Factors Affecting Cell Division

4.0K

Several external and internal factors influence the initiation and inhibition of cell division. For instance, the death of nearby cells or the release of human growth hormone (hGH) promotes cell division. In contrast, lack of hGH or crowding of cells can inhibit cell division.
Several proteins function as internal regulators to ensure each cell cycle stage is completed faithfully before proceeding to the next. Regulator molecules may act directly or influence the activity or production of other...

4.0K

01:23

Negative Regulator Molecules

38.6K

Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.

38.6K

02:17

Separation of Sister Chromatids

4.6K

At the transition from prophase to metaphase, there is a reduction in cohesion along the chromosomal arms, resulting in the resolution of sister chromatids. However, residual cohesin connections remain to hold the sister chromatids together until the transition from metaphase to anaphase. The residual connection prevents any premature separation of sister chromatids, blocking the risks of aneuploidy within the daughter cells.
At the onset of anaphase, separase, a proteolytic enzyme, is...

4.6K

02:36

DNA Damage Can Stall the Cell Cycle

3.2K

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...

3.2K

02:36

DNA Damage can Stall the Cell Cycle

10.2K

関連する実験動画