[精液の酸化-減少能力,精子のDNA断片と精液パラメータの関連性]
Xiao-Chuan Guan1, Yue-Xin Yu1, Ning Zhang1
1Reproduction Medicine Center, General Hospital of Northern Theater Command, Shenyang, Liaoning 110003, China.
Zhonghua nan ke xue = National journal of andrology
|September 5, 2025
まとめ
精子酸化減少ポテンシャル (nORP) は,精子静脈症患者においてより高く,精子DNA断片化 (DFI) の増加と精子の質の低下と相関する. これはnORPが男性の生育能力に影響する酸化ストレスを示すことを示唆している.
科学分野:
- 生殖生物学
- アンドロロジー
- 酸化ストレスに関する研究
背景:
- 男性不妊症の一般的な原因である.
- 酸化ストレスが精子の機能障害に 関わっている.
研究 の 目的:
- 精子酸化減少ポテンシャル (nORP),精子DNA断片化 (DFI) と精子パラメータとの関係を調査する.
- 静脈炎における酸化ストレスの潜在的なマーカーとしてnORPを評価する.
主な方法:
- 522人の男性による臨床データの遡及分析 (静脈腫 n=116,静脈腫でない n=406).
- 精液プラズマ nORP,DFI,高DNA染色能力 (HDS),および精液パラメータのグループ間の比較
- 精液パラメータ,DFI,および静脈炎患者のHDSとのnORPの相関分析.
- 静脈炎の重度 (軽度,中度,重度) に基づく差異の分析
主要な成果:
- 精子数,精子濃度,進行性運動率 (PR%),正常形質 (NSMR) が著しく低下した.
- 精液プラズマのnORP,DFI,HDSは,静脈炎患者において有意に高かった.
- nORPは精子数,濃度,NSMRと負の相関関係があり,DFIとHDSと正の相関関係がある.
- nORP,精子パラメータ,DFI,およびHDSの有意な差異は,静脈の重症度グループ間で観察されました.
結論:
- 精液プラズマのnORPは,静脈炎における酸化ストレスの主な指標として機能する.
- nORPの上昇は,DFIの増加と精液の質の低下と関連しています.
- nORPは,静脈炎の症例における男性の生殖能力の評価に有用なバイオマーカーである可能性があります.
関連する概念動画
01:22Sperm 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
01:41Spermatogenesis
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
01:23Infertility in Males
331
Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...
331
01:27Testes: 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
01:25Accessory 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