目的 探讨晚期早产儿中小于胎龄儿(SGA)与适于胎龄儿(AGA)出生时的铁代谢状态。方法 选取2020年1—12月合肥市妇幼保健院收治的150例晚期早产儿(胎龄34~36+6周)作为研究对象。按照出生体质量和胎龄将早产儿分为SGA组(36例)和AGA组(114例),分析比较两组早产儿出生时的铁代谢状态,并应用多因素线性回归分析血清铁的影响因素。结果 与AGA组相比,SGA婴儿的更低的血清铁[14.5 μmol /L (11.4,17.1) vs 16.4 μmol /L(14.1,18.4),P=0.004]、更低的血清铁蛋白[135.6 μg/L(101.8,176.2) vs 172.5 μg/L(123.0,218.3),P=0.009]和更低的总铁结合力[30.4 μmol/L(26.8,34.9)vs 35.4 μmol/L(29.5,44.6),P=0.001]。两组早产儿的血红蛋白、平均红细胞体积、平均红细胞血红蛋白含量和平均红细胞血红蛋白浓度比较差异均无统计学意义(P>0.05)。在早产儿围生期特征中,胎盘异常(β= –1.949,P=0.009)和母亲糖尿病的发生(β= –2.324,P=0.001)与血清铁水平呈负相关。结论 与早产AGA相比,早产SGA铁储备水平较低,适量补充铁元素对小于胎龄新生儿身体发育有促进作用。
Objective To explore the iron metabolism status in late preterm infants who are small for gestational age(SGA)compared to those appropriate for gestational age(AGA)at birth.Methods A total of 150 late preterm infants(gestational age 34 to 36+6 weeks)admitted to the Maternal and Child Health Hospital of Hefei from January to December 2020 were selected as the study subjects.The preterm infants were divided into the SGA group(36 cases)and the AGA group(114 cases)according to birth weight and gestational age.The iron metabolism status at birth was analyzed and compared between the two groups of preterm infants,and multiple linear regression analysis was applied to identify the influencing factors of serum iron.Results Compared with the AGA group,SGA infants had lower serum iron(14.5[11.4,17.1] vs 16.4 [14.1,18.4],P=0.004),lower serum iron protein(135.6[101.8,176.2] vs 172.5[123.0,218.3],P=0.009),and lower total iron binding capacity(30.4[26.8,34.9] vs35.4[29.5,44.6]P=0.001).There were no statistically significant differences in hemoglobin,mean corpuscular volume,mean corpuscular hemoglobin,and mean corpuscular hemoglobin concentration between the two groups of preterm infants(P>0.05).Among the perinatal characteristics of preterm infants,placental abnormalities(β= –1.949,P=0.009)and the occurrence of maternal diabetes(β= –2.324,P=0.001)were significantly negatively correlated with serum iron levels.Conclusions Compared with preterm infants appropriate for gestational age,preterm infants who are small for gestational age have lower iron reserves at birth.Adequate supplementation of iron has a promoting effect on the physical development of small for gestational age newborns.
目的 探讨NXT629改善肝胆结石形成的相关机制。方法 对C57BL/6J小鼠分别采用常规饮食或成石饮食(LD)喂养,并在LD组小鼠注射PPAR-α拮抗剂NXT629。通过苏木精-伊红染色法染色分析肝脂肪病变,油红O染色检测肝脏脂质的积累,分光光度法检测胆汁或血清中总胆固醇、甘油三酯、磷脂、总胆汁酸、胆固醇饱和指数、低密度脂蛋白胆固醇、高密度脂蛋白胆固醇指标;qPCR法检测小鼠肝组织中ABCG5/8、CYP7A1、CYP7B1、PPAR-α和ABCB11 mRNA的表达情况。结果 NXT629通过靶向PPAR-α降低LD组小鼠肝脏中的ABCG5、ABCG8、ABCB11 mRNA水平以及增加CYP7A1、CYP7B1 mRNA水平,进而减少LD诱导的肝胆结石形成并改善脂质代谢紊乱。结论 NXT629可能通过影响脂代谢相关基因表达改善肝胆结石。
Objective To explore the mechanism on NXT629 improves hepatolithiasis formation.Methods C57BL/6J mice were fed either a regular diet or a lithogenic diet(LD),with the LD group receiving injections of PPAR-α inhibitor NXT629.Liver steatosis was analyzed via HE staining,hepatic lipid accumulation was detected by Oil Red O staining,and total cholesterol,triglycerides,phospholipids,total bile acids,cholesterol saturation index,low density lipoprotein cholesterol,and high density lipoprotein cholesterol levels in bile or serum were measured using assay kits.RT-qPCR was employed to determine the mRNA expression of ABCG5/8,CYP7A1,CYP7B1,PPAR-α,and ABCB11 in mouse liver tissues.Results The results showed that NXT629 target PPAR-α to down-regulate the mRNA levels of ABCG5,ABCG8,and ABCB11 in the livers of LD-fed mice,while increasing the mRNA levels of CYP7A1 and CYP7B1,thereby reducing LD-induced hepatolithiasis formation and improving lipid metabolism disorders.Conclusions NXT629 can improve cholesterol gallstones by affecting the expression of genes related to lipid metabolism.