慢性铁超载破坏生殖道,导致不孕:从临床病例报告到雌性小鼠生殖的实验研究

IF 2.8 4区 医学 Q2 REPRODUCTIVE BIOLOGY
Charles S. da Costa , Vinícius Bermond Marques , Jandinay Mageski , Paulo Caleb J.L. Santos , Rodrigo Alves Faria , Isabela V. Sarmento , Poliana Borges de Oliveira , Maira Krause , Maria Tereza W. D Carneiro , Leonardo dos Santos , Jones B. Graceli
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引用次数: 0

摘要

铁超载与生殖异常有关。例如,一项病例研究显示,尽管在抽血和螯合治疗后,铁状态恢复正常,但一名患有少年血色素沉着症(JH)的女性临床评估显示,卵巢持续萎缩,并伴有长期闭经。然而,铁超载对女性下丘脑-垂体-性腺(HPG)轴的影响尚不完全清楚。基于一名确诊为JH的女性的病例报告随访,本研究阐明了慢性铁超载对雌性小鼠模型的影响,特别关注铁诱导的HPG轴的后果。雌性小鼠注射铁(10 mg/小鼠/天),每周5次,连续4周,观察铁沉积与生殖组织形态、激素水平、活性氧(ROS)和生育能力的关系。铁超载小鼠的血清、下丘脑、垂体、卵巢和子宫中的铁水平升高。铁超载小鼠表现出不规律的动情周期、卵泡生成和雌激素水平异常、黄体减少和闭锁卵泡数量增加。此外,铁超载引起子宫萎缩,并伴有子宫和卵巢纤维化。此外,铁超载小鼠的垂体、卵巢和子宫中的活性氧增加。血清铁水平与卵巢闭锁卵泡和胶原沉积呈正相关,与子宫ROS和胶原沉积呈正相关。在生育能力评估中,铁超载小鼠在90天内未观察到幼崽或窝仔,提示铁超载导致不育。总的来说,这些发现表明慢性铁超载导致HPG轴异常,这是由于铁积累和ROS的产生。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Chronic iron overload disrupts the reproductive tract and leads to infertility: From a clinical case report to the experimental study of reproduction in female mice
Iron overload is associated with reproductive abnormalities. For example, a case study showed that despite the iron status normalization following phlebotomies and chelation therapy, a woman with juvenile hemochromatosis (JH) continued to exhibit persistent atrophic ovaries, accompanied by prolonged amenorrhea by clinical evaluations. However, the iron overload consequences in the female hypothalamic-pituitary-gonadal (HPG) axis are incompletely understood. Based on the case-report follow-up of a woman diagnosed with JH, this study elucidated the effects of chronic iron overload on the female mouse model, with a special focus on iron-induced consequences in the HPG axis. Female mice were injected with iron (10 mg/mouse/day) five times per week for four weeks, and iron deposits and the reproductive tissues morphology, hormone levels, reactive oxygen species (ROS), and fertility were assessed. Iron-overloaded mice had increased iron levels in serum, hypothalamus, pituitary, ovary, and uterus. Iron-overloaded mice displayed irregular estrous cycles, abnormal folliculogenesis and estrogen levels, reduced corpora lutea and increased atretic follicle numbers. Furthermore, iron overload induced uterine atrophy, along with uterine and ovarian fibrosis. Further iron-overloaded mice increased ROS in the pituitary, ovary and uterus. Positive correlations were found between serum iron levels and ovarian atretic follicles and collagen deposition, and between uterine iron levels and uterine ROS and collagen deposition. In the fertility evaluation, no pups or litters were observed over 90 days in the iron-overloaded mice, suggesting that iron overload causes infertility. Collectively, these findings indicate that chronic iron overload leads to HPG axis abnormalities due to iron accumulation and ROS generation.
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来源期刊
Reproductive toxicology
Reproductive toxicology 生物-毒理学
CiteScore
6.50
自引率
3.00%
发文量
131
审稿时长
45 days
期刊介绍: Drawing from a large number of disciplines, Reproductive Toxicology publishes timely, original research on the influence of chemical and physical agents on reproduction. Written by and for obstetricians, pediatricians, embryologists, teratologists, geneticists, toxicologists, andrologists, and others interested in detecting potential reproductive hazards, the journal is a forum for communication among researchers and practitioners. Articles focus on the application of in vitro, animal and clinical research to the practice of clinical medicine. All aspects of reproduction are within the scope of Reproductive Toxicology, including the formation and maturation of male and female gametes, sexual function, the events surrounding the fusion of gametes and the development of the fertilized ovum, nourishment and transport of the conceptus within the genital tract, implantation, embryogenesis, intrauterine growth, placentation and placental function, parturition, lactation and neonatal survival. Adverse reproductive effects in males will be considered as significant as adverse effects occurring in females. To provide a balanced presentation of approaches, equal emphasis will be given to clinical and animal or in vitro work. Typical end points that will be studied by contributors include infertility, sexual dysfunction, spontaneous abortion, malformations, abnormal histogenesis, stillbirth, intrauterine growth retardation, prematurity, behavioral abnormalities, and perinatal mortality.
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