関連する実験動画
Updated: Sep 9, 2025

10:23
Analysis of Epididymal Protein Synthesis and Secretion
Published on: August 25, 2018
9.4K
エピディジマ経路における精子アクロソームの整合性を維持するために必要不可欠である
Saori Haga1, Kaori Nozawa1, Ferheen Abbasi2,3
1Department of Advanced Medical Technologies, National Cerebral and Cardiovascular Center, Suita, Osaka 564-8565, Japan.
まとめ
精子生存と男性の生殖能力に不可欠である. Tex50のノックアウトマウスは,精子形成後の重要な役割を強調して, epididymisでglobozoospermiaのような欠陥を示しています.
科学分野:
- 生殖生物学
- 分子遺伝学
- 精子生成
背景:
- 精子の成熟は,形状が大きく変化する過程である, epididymal トランジットで起こります.
- 男性の不妊の原因であるグローボゾースペルミアには,アクロソームが欠けている丸い頭の精子が含まれており,他の欠陥があります.
- エピディディミスの精子生存を制御する分子メカニズムは,まだ完全に理解されていません.
研究 の 目的:
- 男性の生育能力と精子の発達における Testis expressed 50 (Tex50) の作用を調査する.
- エピディジマ経路におけるグローボゾースペルミアと精子の生存におけるTex50の役割を解明する.
- 精子生成時にTex50の正確な位置を決定する.
主な方法:
- CRISPR-Cas9技術を用いたTex50ノックアウト (KO) マウスの生成.
- 生殖能力の評価と精子形態の評価を含むKOマウスの表型分析.
- TEX50-mCherryノックインマウスと電子顕微鏡を用いた局所化研究.
主要な成果:
- Tex50 KOのオスマウスは不妊で, epididymalの精子異常と運動能力の低下を示した.
- 精子形態とグローボゾオスペミアに関連するタンパク質発現は,KOマウスの丸では正常であった.
- TEX50タンパク質は,アクロソームの周りの環状構造に局所化し,精子頭の後部に移動し,アクロソーム反応後に持続しました.
結論:
- Tex50 KOマウスのグローボゾオスペルミアのようなフェノタイプは,精子から先頭葉への移動後に発生する.
- TEX50は精子膜のタンパク質で,精子膜の異常に対する精子の生存に不可欠です.
- Tex50は,マウスの精子形成と雄性生殖能力の維持に重要な役割を果たします.
関連する概念動画
Sperm Transport
1.4K
The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
The maturation phase occurs in the epididymis, where sperm...
The maturation phase occurs in the epididymis, where sperm...
1.4K
Spermatogenesis
103.3K
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...
103.3K
Accessory Glands of the Male Reproductive System
2.0K
The accessory ducts involved in sperm maturation and transportation include the epididymides, vasa deferentia, ejaculatory ducts, and urethra. These ducts play a critical role in the maturation, storage, and transportation of sperm from the testes to the urethra, where it is then released during ejaculation.
The epididymis is a small, comma-shaped organ located at the back of each testicle. The epididymis can be divided into three main parts: the head, body, and tail. The head of the epididymis...
The epididymis is a small, comma-shaped organ located at the back of each testicle. The epididymis can be divided into three main parts: the head, body, and tail. The head of the epididymis...
2.0K
Testes: Histology
1.5K
A tough, fibrous membrane, the tunica albuginea, covers the testes, extending inward to form fibrous partitions or septa, dividing them into internal compartments called lobules. Each lobule has 1 to 3 tightly coiled seminiferous tubules where sperm production occurs. These tubules merge into a tubular network at the back of the testis, known as the rete testis. It connects to 15 to 20 efferent ductules, leading to the epididymis.
The spermatogenic cells, responsible for producing sperm, are...
The spermatogenic cells, responsible for producing sperm, are...
1.5K
Sperm Structure and Semen Composition
4.9K
During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...
4.9K
Accessory Ducts of the Male Reproductive System
1.7K
The male reproductive system is a complex network of organs and tissues that work together to produce and transport sperm. The epididymis, vasa deferens, ejaculatory ducts, and urethra are the accessory ducts involved in sperm maturation and transportation. These ducts play a critical role in the production and transportation of sperm from the testes to the urethra, where it is then released during ejaculation.
The epididymis is a small, comma-shaped organ located at the back of each testicle....
The epididymis is a small, comma-shaped organ located at the back of each testicle....
1.7K

