在常规试管婴儿后,脂酶C zeta的缺陷会导致多精子和低受精率:不仅仅是ICSI失败
Jian-Fang Che1, Hui-Xia Wu1, Si-Cong Zeng1,2
1School of Medicine, Hunan Normal University, Changsha 410013, China.
Asian journal of andrology
|December 4, 2023
概括
脂酶C zeta (PLCζ) 对于卵子激活至关重要. 在PLCZ1的突变导致不孕. 精子PLCζ水平与常规试管婴儿中受精成功相关,识别有低受精率的男性.
科学领域:
- 生殖生物学 生殖生物学
- 人类遗传学 人类遗传学
- 不孕症的研究研究.
背景情况:
- 脂酶C zeta (PLCζ) 对于卵细胞激活至关重要,在受精后触发振荡.
- PLCZ1基因的突变与男性不孕症和细胞内质精子注射 (ICSI) 失败有关.
- 精子PLCζ在常规体外受精 (cIVF) 受精率中的作用仍然不清楚.
研究的目的:
- 调查精子PLCζ对cIVF受精结果的影响.
- 识别新的PLCZ1突变并描述它们与受精缺陷的关联.
- 评估精子PLCζ作为预测cIVF受精率的生物标志物.
主要方法:
- 在不孕男性中对PLCZ1突变的遗传分析.
- 免疫光染色以评估精子的PLCζ表达.
- 卵细胞激活测试和受精参数的评估 (例如,2PN率,多精子症).
- 精子PLCζ比例和cIVF受精率之间的相关性分析.
主要成果:
- 确定了一种已知的和两种与体外多精子和延迟前核形成相关的新型PLCZ1突变.
- 受影响患者的精子缺乏功能性PLCζ,无法诱导振荡.
- 人工卵细胞激活在ICSI中拯救了多精子表型.
- 在cIVF中,PLCζ表达精子的比例和2PN率和总受精率之间发现了正相关性.
- PLCζ表达的最佳切线为56.7%,预测了低cIVF受精率 (≤30%).
结论:
- 这项研究扩大了PLCZ1.1已知的突变和表型谱.
- 精子PLCζ是影响cIVF受精成功的关键因素.
- 精子PLC分析是一种有前途的生物标志物,用于识别由于卵细胞激活缺陷的低受精率的男性,这使得超越ICSI失败病例的更广泛的人口受益.
相关概念视频
Fertilization
71.1K
During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...
71.1K
Meiosis II
183.5K
Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each...
183.5K
Nondisjunction
75.7K
During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.
75.7K
In Vitro Fertilization
286
In vitro fertilization (IVF) is a form of assisted reproductive technology where an egg is fertilized with sperm in a controlled laboratory environment before transferring the resulting embryo into the uterus. This process is designed to help individuals and couples experiencing difficulties conceiving.
The IVF process begins with ovarian stimulation, during which reproductive endocrinologists prescribe hormonal medications to stimulate the ovaries to produce multiple eggs instead of the single...
The IVF process begins with ovarian stimulation, during which reproductive endocrinologists prescribe hormonal medications to stimulate the ovaries to produce multiple eggs instead of the single...
286


