Maternal diabetes modulates renal morphogenesis in offspring

Area of Science:

• Developmental Biology
• Nephrology
• Endocrinology

Background:

• Maternal diabetes creates an adverse in utero environment.
• The impact of maternal diabetes on fetal kidney development (nephrogenesis) is not fully understood.

Purpose of the Study:

• To investigate the effects of maternal diabetes on nephrogenesis in mouse offspring.
• To explore potential mechanisms, including apoptosis and specific signaling pathways, involved in impaired kidney development.

Main Methods:

• Streptozotocin-induced diabetes in pregnant mice at embryonic day 13.
• Analysis of offspring body weight, size, kidney weight, and nephron number post-birth.
• Immunohistochemical analysis for apoptotic podocytes and active caspase-3.
• Measurement of intrarenal angiotensinogen, renin mRNA, and NF-kappaB pathway activation.

Main Results:

• Offspring of diabetic mothers exhibited reduced body weight, size, kidney weight, and nephron number.
• Increased apoptosis in podocytes and renal tubules was observed in offspring of diabetic mice.
• Elevated intrarenal angiotensinogen and renin mRNA expression was noted.
• Upregulation and activation of NF-kappaB pathway components (p50, p65) were detected.

Conclusions:

• Maternal diabetes significantly impairs nephrogenesis in offspring.
• Enhanced intrarenal renin-angiotensin system activation and NF-kappaB signaling are potential mediators.
• These findings highlight the detrimental effects of maternal hyperglycemia on fetal kidney development.