多能体幹細胞は,ドロソフィラ胞の幹細胞ニッチに寄与する

Justin Voog¹, Cecilia D'Alterio, D Leanne Jones

¹Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, California 92037, USA.

Nature

|July 22, 2008

まとめ

ドロソフィラの体幹細胞は,幹細胞の自己再生に不可欠なアピカルハブを維持しています. DE-カデリンとエスカゴットは,体幹細胞の行動とニッチサイズを調節し,組織ホメオスタシスを確保します.

科学分野:

発達生物学発達生物学について
幹細胞生物学幹細胞生物学
ドロソフィラ・メラノガスター研究研究

背景:

大人の幹細胞は,彼らの行動を調節する特殊なニッチに宿っている.
ニッチのサイズと機能は,組織ホメオスタシスの維持と修復に不可欠です.
ドロソフィラの雄性性腺は,幹細胞とニッチの相互作用を研究するためのモデルシステムを提供します.

研究の目的:

ドロソフィラ丸のニッチを維持するソマティック幹細胞の役割を調査する.
ソマティック幹細胞の行動とニッチのアイデンティティを調節する遺伝的要因を特定する.
組織再生のためのニッチサイズと機能を制御するメカニズムを理解する.

主な方法:

ドロソフィラ胞の幹細胞集団の分析.
ソマティック幹細胞の維持におけるDE-カデリンの機能を調査する.
ハブ細胞のアイデンティティにおける転写抑制体エスカルゴの役割を調べる.

主要な成果:

ソマティック幹細胞は,アピカルハブとソマティックキストの両方の系統に寄与します.
DE-カデリンは,体幹細胞の維持とアピカルハブの完全性にとって不可欠です.
エスカルゴは,体細胞がハブ細胞の同一性を採用し維持する能力を調節する.

結論:

ソマティック幹細胞は,そのニッチとダイナミックに相互作用して,組織ホメオスタシスを維持する.
DE-カデリンとエスカルゴットを含む遺伝プログラムは,ニッチサイズと機能を制御します.
これらの発見は,臓器再生と生涯にわたる組織維持に関する洞察を提供します.

さらに関連する動画

09:08

Dissection and Live-Imaging of the Late Embryonic Drosophila Gonad

Published on: October 17, 2020

07:10

Extended Live Imaging of Female Drosophila melanogaster Germline Stem Cell Niches

Published on: December 20, 2024

関連する概念動画

01:41

Spermatogenesis

Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...

01:10

Zygotic Development And Stem Cell Formation

The development of all multicellular organisms starts with the fusion of haploid cells called sperm and egg to form a diploid zygote. A zygote is a totipotent cell that can develop into a complete organism. The zygote undergoes cell division or cleavage to form an 8-cell mass. Until this stage, the cells are spherical, loosely attached, and remain totipotent. Totipotent cells are capable of developing both the embryonic and the extraembryonic tissues. However, as they continue to divide, they...

01:27

Source And Potency Of Stem Cells

Stem cells are undifferentiated cells with extensive self-renewal properties that help them maintain their population during the fetal and adult stages of life. They can specialize in all cell types of the human body. However, their differential potential may vary and can be classified into five types. Stem cells can be (1) Totipotent, (2) Pluripotent, (3) Multipotent, (4) Oligopotent, and (5) Unipotent. Each stem cell has a specific origin; the fertilized egg or zygote is a totipotent cell and...

01:26

Stem Cell Niche

The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...

01:06

Multipotency and Niche of Bulge Stem Cell

A hair follicle or HF is a small part of the skin that produces the hair shaft. Paul Gerson Unna was the first to observe a bulge in the human hair follicle's outer root sheath (ORS). The bulge is present between the sebaceous gland and the arrector pili muscle and is the niche for hair follicle stem cells (HFSCs). The bulge is also a niche for melanocyte stem cells, and their loss results in graying of hair. The HFSCs express Sox9 and Lhx2, which help them maintain stemness and prevent...

01:22