関連する実験動画
Updated: Jun 25, 2026
09:48
Separation of Spermatogenic Cell Types Using STA-PUT Velocity Sedimentation
Published on: October 10, 2013
精子類の微分化には,交差点粘着分子-Cの下流にある細胞の極性複合体の組み立てが必要です
Georgia Gliki1, Klaus Ebnet, Michel Aurrand-Lions
1Vascular Development Laboratory, Cancer Research UK London Research Institute, London WC2A 3PX, UK.
Nature
|September 17, 2004
まとめ
交差点粘着分子-C (JAM-C) は,マウスの精子発育に不可欠です. このタンパク質は,精子生成中に適切な細胞の偏分を保証し,アゾオスペルミアによって引き起こされる男性の不妊症を予防します.
科学分野:
- 生殖生物学 生殖生物学
- 細胞生物学 細胞生物学
- 分子遺伝学 分子遺伝学
背景:
- 精子生成は,幹細胞の微分化と微分化の過程で精子が生成されます.
- 精子生成は,丸い精子類が精子に成熟する重要な段階です.
- 精子発達の欠陥は男性不妊症 (アゾオスペルミア) を引き起こす可能性があります.
研究 の 目的:
- 交差点粘着分子-C (JAM-C) の精子生成における役割を調査する.
- JAM-Cが,丸い精子細胞を精子細胞へと分化させるのに果たす役割を調べる.
- 精子の発達におけるJAM-Cの役割の基礎となる分子メカニズムを解明する.
主な方法:
- 精子生成を研究するためにマウスモデルを使用した.
- 精巣細胞におけるJAM-Cの発現と機能を研究した.
- ワイルドタイプとJam-C欠乏症の精巣の細胞分極と精子形態を分析した.
主要な成果:
- 細胞表面タンパク質であるJAM-Cは,マウスの精子生成に不可欠です.
- Jam-C欠乏症は,丸い精子細胞の偏極化の障害につながる.
- JAM-Cは,精子粒子が精子細胞に適切に分化するために必要です.
結論:
- JAM-Cは,精子の偏極化を調節することによって,精子細胞の発達に重要な役割を果たします.
- 適切なJAM-C機能は,精子生成の成功と男性不妊症の予防に不可欠です.
- 細胞の極性複合体の組み立てにおけるJAM-Cの役割は,精子形成におけるその機能の鍵である.
関連する概念動画
02:50Spindle Assembly
Spindle assembly occurs through three, often coexisting, pathways – the centrosome-mediated pathway, the chromatin-mediated pathway, and the microtubule-mediated pathway – collectively contributing to form a robust spindle apparatus.
In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a microtubule array...
In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a microtubule array...
01:39Mechanism of Filopodia Formation
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
01:21Cell Polarization by Rho Proteins
Cell polarity is the asymmetric distribution of cellular and membrane components, making one side of the cell different from the other. This polarity is essential to many processes such as embryogenesis, axon migration, glucose transport across epithelial cells, and directional cell migration. A migrating cell responds to intracellular or extracellular signals via molecular cascades that reorganize the actin cytoskeleton to establish this polarity. In these cells, the Rho family proteins Cdc42,...
01:32Cytoskeletal Coordination in Cell Migration
A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker proteins that...
01:03Anchoring Junctions
Anchoring junctions are multiprotein complexes that help cells connect to other cells and the extracellular matrix. Anchoring junctions are present on the lateral and basal surfaces of cells, providing strong and flexible connections. Focal adhesions are often formed due to cell interactions with the ECM substrata, which initiate signal transduction via kinase cascades and other mechanisms. Together, they provide stability and tissue integrity. There are three types of anchoring junctions:...
01:24Adherens Junctions
Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types – adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
Adherens Junctions are Dynamic
The endothelial cells...
Adherens Junctions are Dynamic
The endothelial cells...