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関連する概念動画

Adult Stem Cells01:33

Adult Stem Cells

Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously renew...
Determination01:51

Determination

During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
Stem Cell Niche01:26

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...
Multipotency and Niche of Bulge Stem Cell01:06

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...
Role Of Notch Signalling In Intestinal Stem Cell Renewal01:12

Role Of Notch Signalling In Intestinal Stem Cell Renewal

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...
Neurons: The Cell Body and the Dendrites01:23

Neurons: The Cell Body and the Dendrites

A typical nerve cell comprises three main components: the cell body, dendrites, and the axon. The cell body, also known as the soma or perikaryon, serves as the central biosynthetic hub housing a nucleus surrounded by cytoplasm containing organelles commonly found in most cells. Notably, Nissl bodies, clusters of the rough endoplasmic reticulum and free ribosomes responsible for protein synthesis, are distinctive features of the neuronal cell body. As neurons age, aggregates of a brown pigment...

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Analysis of Trunk Neural Crest Cell Migration using a Modified Zigmond Chamber Assay
12:17

Analysis of Trunk Neural Crest Cell Migration using a Modified Zigmond Chamber Assay

Published on: January 19, 2012

幹細胞は自分のニッチを見つけます.

A Spradling1, D Drummond-Barbosa, T Kai

  • 1HHMI/Department of Embryology, Carnegie Institution of Washington, Baltimore, Maryland 21210, USA.

Nature
|November 2, 2001
PubMed
まとめ
この要約は機械生成です。

幹細胞のニッチ,すなわち幹細胞を制御する特定のマイクロ環境は,理論から現実へと移行しています. 新しい技術により,科学者は皮膚や腸などの臓器のこれらのニッチを研究することができ,幹細胞療法が進歩しています.

さらに関連する動画

Isolation of Distinct Cell Populations from the Developing Cerebellum by Microdissection
08:02

Isolation of Distinct Cell Populations from the Developing Cerebellum by Microdissection

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Visualization of Cell Cycle Variations and Determination of Nucleation in Postnatal Cardiomyocytes
09:41

Visualization of Cell Cycle Variations and Determination of Nucleation in Postnatal Cardiomyocytes

Published on: February 24, 2017

関連する実験動画

Last Updated: Jun 30, 2026

Analysis of Trunk Neural Crest Cell Migration using a Modified Zigmond Chamber Assay
12:17

Analysis of Trunk Neural Crest Cell Migration using a Modified Zigmond Chamber Assay

Published on: January 19, 2012

Isolation of Distinct Cell Populations from the Developing Cerebellum by Microdissection
08:02

Isolation of Distinct Cell Populations from the Developing Cerebellum by Microdissection

Published on: September 21, 2014

Visualization of Cell Cycle Variations and Determination of Nucleation in Postnatal Cardiomyocytes
09:41

Visualization of Cell Cycle Variations and Determination of Nucleation in Postnatal Cardiomyocytes

Published on: February 24, 2017

科学分野:

  • 幹細胞生物学 幹細胞生物学
  • 発達生物学 発達生物学とは
  • 組織工学は,組織工学である.

背景:

  • 幹細胞のニッチという概念は,規制的なマイクロ環境として確立されていますが,主に理論的なものです.
  • 幹細胞とそのニッチの特定と操作は,この分野における大きな課題となっています.

研究 の 目的:

  • 幹細胞のニッチの理論的構成から実験的に処理可能な実体への移行を調査する.
  • 最近の技術的進歩が幹細胞のニッチの特徴付けをどのように可能にするかを強調する.
  • 幹細胞の調節と治療上の応用を理解するための意味について議論する.

主な方法:

  • 幹細胞活動を制御する特定のマイクロ環境ゾーンの特徴.
  • 性腺,皮膚,腸など様々な臓器の幹細胞のニッチを調査する.
  • 個々の幹細胞とそのニッチな成分を特定し,操作するための高度な技術を使用します.

主要な成果:

  • 技術の進歩により,幹細胞のニッチの詳細な研究が可能になりました.
  • 幹細胞のニッチは,重要な臓器で成功裏に特定され,特徴づけられました.
  • これらの研究は,ニッチ内の幹細胞の調節の細胞および分子機構を明らかにし始めています.

結論:

  • 幹細胞のニッチは実験的に利用可能になり,理論的な概念を超越しています.
  • 細胞および分子レベルで幹細胞のニッチを理解する技術は進歩しています.
  • 幹細胞のニッチの研究は,再生医療における将来の治療戦略に大きな期待を寄せている.