循環性皮質BMPシグナリングは,髪の再生中に幹細胞の活性化を調節する
Maksim V Plikus1, Julie Ann Mayer, Damon de la Cruz
1Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, California 90033, USA.
Nature
|January 19, 2008
まとめ
骨形態遺伝性タンパク質 (BMP) は,異なる耐火性および有能な相を作り出すことにより,毛細葉の再生を調節する. この発見は,幹細胞の調節と髪の成長制御に関する洞察を提供します.
科学分野:
- 幹細胞生物学 幹細胞生物学とは
- 皮膚科 皮膚科について
- 発達生物学 発達生物学とは
背景:
- 毛皮は,成人の生涯を通じて周期的に再生するミニ臓器です.
- 毛皮の幹細胞の活性化は,ニッチ微環境によって調節され,周期的なβ-カテニン活性を含みます.
- 再生は波動的に発生し,卵泡と周囲の環境との連携を示唆しています.
研究 の 目的:
- 毛皮の再生中の幹細胞活動の規制メカニズムを調査する.
- 成人マウスの皮膚における循環再生を調整するシグナル伝達経路を特定する.
- 髪の幹細胞ホメオスタシスを調節するマイクロ環境の役割を理解する.
主な方法:
- マウスの皮膚における周期性遺伝子発現の分析,骨形態遺伝タンパク質 (BMP) に焦点を当てた.
- ネズミの皮膚における遺伝子操作 (BMP抗体であるノギンの過剰発現).
- ミュータントマウスと野生型のマウスの間の皮膚移植実験.
- BMP4タンパク質の投与は,髪の再生段階への影響を評価するために行われます.
主要な成果:
- 皮膚におけるBMP2とBMP4の定期的発現は,髪の再生を調節する.
- BMPシグナリングは,テロゲン相を,耐火性 (高いBMP) と有能性 (低いBMP) の相に分けます.
- ノーギンの過剰発現は,耐火期を短縮し,再生波の伝播を加速した.
- BMPの活動は,隣接する卵泡に影響を与え,そのサイクリング行動に影響を与えます.
結論:
- BMPシグナル伝達は,毛皮の幹細胞ホメオスタシスの重要なレギュレータとして作用する.
- BMPは,髪の成長の"ハロン"阻害剤として機能する可能性があります.
- 発見は,マクロ環境による幹細胞活動の階層的な規制を強調しています.
- BMPの役割を理解することは,皮膚の再生,薬物投与,がん研究にとって不可欠です.
関連する概念動画
Mitogens and the Cell Cycle
6.3K
Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
6.3K
Regulation of Hematopoietic Stem Cells
3.4K
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...
3.4K
TGF - β Signaling Pathway
7.2K
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...
7.2K
Renewal of Skin Epidermal Stem Cells
2.4K
The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular...
2.4K
Multipotency and Niche of Bulge Stem Cell
2.9K
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...
2.9K
Role Of Notch Signalling In Intestinal Stem Cell Renewal
1.8K
Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
1.8K


