Although maternal high-fructose intake induces cardiometabolic syndrome in adult offspring, whether it induces hypertension in successive multiple generations has not yet been studied. We hypothesized that maternal high-fructose intake induces multigenerational activation of the renin-angiotensin-aldosterone system. Pregnant mice were offered 20% fructose in drinking water, of which subsequent first to fourth generation offspring were raised without being offered fructose. Blood pressure was measured via the tail-cuff method, mRNA expression was determined using the quantitative polymerase chain reaction, and fibrosis was evaluated using trichrome staining. Maternal high-fructose intake statistically significantly increased blood pressure in the first and second, but not the third and fourth, generation offspring as compared to the control group, with maximal increases in serum renin, angiotensin II, and aldosterone in the third generation offspring. It increased the mRNA expression of renin-angiotensin-aldosterone system genes as well as the expression of renin in the kidneys in the first to third generation offspring, with the exception of the vasodilatory Mas1 gene, the mRNA expression of which was the lowest in the second generation offspring. Moreover, it maximally increased fibrosis and the mRNA expression of inflammatory cytokines in the second generation offspring and increased the mRNA expression of oxidative factors in the first to third generation offspring, but maximally decreased the mRNA expression of antioxidant-encoding Sod1 in the second generation offspring. Maternal high-fructose intake induces multigenerational activation of renin-angiotensin-aldosterone system, and the results of this study implicate that it epigenetically induces cardiometabolic syndrome in multiple generations of offspring.
Keywords: blood pressure; cytokines; fructose; renin-angiotensin; syndrome; system.