Effects of maternal high salt exposure on growth and blood pressure of maternal and offspring / 中国医师杂志

ABSTRACT

Objective To establish the model of maternal high salt exposure and investigate the effects of maternal high salt exposure on growth and blood pressure in maternal and offspring.Methods At the age of 3 weeks (after weaning) female specific pathogen free (SPF) Sprague Dawley (SD) rats fed for 1 weeks,were randomly divided into three groups,including the high diet salt group (group H,8％ NaCl),low salt diet group (group L,0.26％ NaCl),and normal diet salt group (group N,0.5％ NaCl).Breeding started in feeding until 12 weeks of age,and the inverted microscope was used to see male sperm full view as the zeroth day of pregnancy.Pregnant,lactating,postpartum were grouped by the corresponding feed.Rats fed high salt group after weaning rats continued to high salt diet,denoted as HH group;maternal low salt group after weaning rats received continued low salt diet,denoted as LL group;normal saline group rats after weaning rats fed with normal feed to salt,denoted as NN group.Each period of maternal and offspring weight were measured with the electronic balance.Maternal and offspring's blood pressure was detected with Softron BP-2010A intelligent non-invasive blood pressure instrument (Japan) in different periods.SPSS19.0 software was used to analyze the data,including One-way ANOVA analysis,SNK,and LSD methods.Results High salt exposure,maternal postpartum 2 weeks,and the weight of H group were higher than that of L group,there were no difference in other different periods of maternal.In the offspring,in addition to 32 weeks of age,weight of HH group was lower than that of LL group;and at the age of 8 weeks and 24 weeks,HH group rats body weight was less than the NN group,the differences were statistically significant (P ＜ 0.05).After high salt exposure,after 3 weeks postpartum maternal blood pressure in H group was the highest (158.79 ± 1.87)mmHg.In the offspring,the blood pressure of 60 weeks in the HH group was the highest (162.50 ±2.11) mmHg.At the age of 8 weeks,9 weeks,10 weeks,11 weeks,7 days gestation,pregnant 14 days,1 weeks postpartum,2 weeks postpartum,3 weeks postpartum of maternal,and high salt group's blood pressure were higher than those in normal group,at the age of 9 weeks,10 weeks,11 weeks,7 days of pregnancy,postpartum 1 weeks,2 weeks postpartum,postpartum 3 weeks of high salt group's blood pressure was higher than the low salt group.In the offspring each period of HH group,the blood pressure was higher than that of NN group and LL group,and in the 28,32,36,44,48,and 52 weeks,blood pressure of LL was higher than that of NN group,the differences were statistically significant (P ＜ 0.05).Conclusions Maternal high salt exposure can affect the growth and development of offspring and lead to the occurrence of maternal and offspring hypertension,and with the high salt exposure time,blood pressure was gradually rising trend.