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Published on: February 4, 2015
Impacts of low birthweight on kidney development and intergenerational growth of the offspring
Akiyo Sekimoto1,2, Yoko Takaso1, Haruka Saruyama1
1Division of Clinical Pharmacology and Therapeutics, Tohoku University Graduate School of Pharmaceutical Sciences, Sendai 980-8578, Japan.
Insights
Low birth weight (LBW) in mice leads to adult kidney issues and affects the next generation. Tadalafil treatment reduced hypertension and improved kidney health in LBW offspring.
Area of Science:
- Developmental Biology
- Nephrology
- Pharmacology
Background:
- Low birth weight (LBW) is linked to adult diseases and intergenerational health risks.
- Mechanisms and interventions for LBW-associated consequences remain unclear.
Purpose of the Study:
- To investigate the cross-generational effects of LBW using a mouse model.
- To evaluate tadalafil's therapeutic potential in mitigating LBW-associated health issues.
Main Methods:
- Established a mouse model of LBW using reduced uterine perfusion pressure (RUPP).
- Assessed renal development, adult blood pressure, and renal pathology in LBW offspring (R1) and tadalafil-treated R1 mice.
- Examined reproductive outcomes, liver function, and placental development in pregnant R1 mice.
Main Results:
- RUPP-pups (R1) exhibited lower birth weights, delayed renal development, and fewer glomeruli.
- Adult R1 mice showed persistent glomeruli reduction and elevated blood pressure.
- Tadalafil treatment reduced hypertension in both sexes and improved renal pathology in males.
- Pregnant R1 mice had impaired liver metabolism and placental angiogenesis, causing subsequent-generation growth restriction.
Conclusions:
- LBW has lasting impacts on adult health and affects future generations.
- Tadalafil shows potential in mitigating LBW-associated hypertension and renal damage.
- Intergenerational effects of LBW highlight the need for early interventions.
Abstract:
Low birthweight (LBW) increases the risk of adult-onset diseases, including kidney diseases, with intergenerational consequences; however, the underlying mechanisms and effective interventions are unclear. To examine the cross-generational effects of LBW, we established an LBW mouse model through reduced uterine perfusion pressure (RUPP) and investigated the therapeutic potential of tadalafil, a phosphodiesterase 5 inhibitor, on LBW-associated consequences. RUPP-pups (R1) had lower fetal and birth weights, delayed renal development, and fewer glomeruli than Sham-pups. In adulthood, R1 mice exhibited persistently fewer glomeruli and elevated blood pressure, while Tadalafil-R1 mice showed reduced hypertension in both sexes and improved renal pathological changes in males. Additionally, pregnant R1 mice displayed inadequate gestational liver hypertrophy, impaired hepatic purine metabolism, and diminished placental angiogenesis, resulting in fetal growth restriction in the subsequent generation. These findings underscore the lasting impact of LBW on adult health and future generations and suggest tadalafil's potential to mitigate LBW-associated risks.
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