Man Yang , Yinchao Li , Lei Lei , Shangnan Zou , Huanling Lai , Yue Xing , Yubao Fang , Qihang Zou , Yaqian Zhang , Xiaofeng Yang , Liemin Zhou
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引用次数: 0
Abstract
The teratogenic effects of valproic acid (VPA) can lead to abnormal fetal development, which may be related to abnormal maternal one-carbon metabolism. Methylene-tetrahydrofolate reductase (MTHFR) is a key enzyme involved in one-carbon metabolism. Variations in MTHFR, particularly 677 C>T, are associated with susceptibility to teratogenicity. However, the current research is limited to clinical practice. Therefore, an Mthfr677C>T mouse model was constructed to explore whether the 677 C > T polymorphism increases the teratogenic susceptibility to VPA. Pregnant wild type and Mthfr677C>T mice were exposed to a single teratogenic dose of 400 mg/kg VPA or saline via intraperitoneal injection on day 7.5 of gestation (E7.5), and fetuses were harvested on E18.5. Resorbed fetuses, malformations, including neural tube defects (NTDs) increased in the VPA-treated group. Consistent with the clinical data, Mthfr677C>T mice also showed lower liver MTHFR enzymatic activity and elevated serum homocysteine (Hcy) levels. No abnormalities were observed in the saline-treated groups. Therefore, intraperitoneal injected VPA significantly increased the malformation rate of CT and TT heterozygote and homozygote mice, respectively, compared to that of CC mice (P < 0.05). In this study, an association between the 677 C > T polymorphism of MTHFR and susceptibility to VPA-induced teratogenesis in mice, especially in TT mice, was found. This may be related to changes in Hcy metabolism. Collectively, these data have important implications for exploring the different responses of individuals to drug-induced teratogenesis, which may help guide the adjustment of drug selection during pregnancy.
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.