Association between antioxidant nutrients and pregnancy complications: a Mendelian randomization study / 预防医学

Objective@#To investigate the causal relationship between antioxidant nutrients and pregnancy complications, so as to provide the reference for the prevention and treatment of pregnancy complications.@*Methods@#Data of seven antioxidant nutrients including vitamin A, vitamin C, vitamin E, selenium, zinc, copper and iron were collected from genome-wide association study (GWAS) Catalog database, and data of four pregnancy complications including gestational diabetes mellitus, pre-eclampsia, spontaneous abortion and preterm birth were collected from the Finland database. Single nucleotide polymorphism (SNP) data were collected, and 27 SNPS strongly correlated with seven antioxidant nutrients were selected as instrumental variables. Mendelian randomization (MR) analyses were performed using the inverse-variance weighted (IVW) method with seven antioxidant nutrients as exposures factors and four pregnancy complications as outcome variables. The heterogeneity was assessed using the Cochran's Q test, the horizontal pleiotropy was assessed using the MR-PRESSO test and MR-Egger regression, and the robustness of the results was verified with the leave-one-out.@*Results@#Cochran's Q test showed heterogeneity of MR results between vitamin C and gestational diabetes mellitus, preeclampsia and preterm birth, between vitamin E and iron and gestational diabetes (all P<0.05), and a random effect model was employed. There was no heterogeneity in other results (all P>0.05), and a fixed effect model was employed. MR analysis results showed that there was no causal association between seven antioxidant nutrients and the risk of four pregnancy complications (all P>0.05). MR-PRESSO test and the MR-Egger regression identified no horizontal pleiotropy of instrumental variables (both P>0.05).@*Conclusion@#This study did not find genetically predicted associations of antioxidant nutrients with pregnancy complications.

Correlation between abnormal glucose and lipid metabolism and occurrence and development of cancers / 中国肿瘤生物治疗杂志

@#流行病学研究表明，糖尿病患者中肿瘤的发病风险显著提高，但两者的相关性及发生机制尚未完全阐明。有文献报道， 个 体的能量稳态、糖脂类代谢、炎症反应等在糖尿病相关肿瘤的发生和进展中发挥了重要作用。本文从糖脂代谢异常、相关信号通路 基因表达异常对肿瘤发生发展的影响及其作用机制等方面进行综述，期望为与糖尿病相关肿瘤发生的预防和治疗提供相关依据。