Long-term effects of streptozotocin-induced gestational diabetes mellitus on mechanical sensitivity and intraepidermal nerve fibers in female and male mice offspring

• Published in: Neuroscience letters Vol. 812; p. 137402
• Main Authors: Muñoz-Islas, Enriqueta, Vargas-Balderas, Dehni Irasema, Hernandez, Ivanna, Vazquez-Mora, Juan Antonio, Acosta-González, Rosa Issel, Jiménez-Andrade, Juan Miguel
• Format: Journal Article
• Language: English
• Published: Ireland Elsevier B.V 24.08.2023
• Subjects: GDM; Long-term outcomes; Mechanical sensitivity; Nerve fibers; Offspring; Long-term outcomes; GDM; Nerve fibers; Offspring; Mechanical sensitivity
• ISSN: 0304-3940; 1872-7972
• DOI: 10.1016/j.neulet.2023.137402

•The mechanical sensitivity and intraepidermal density were assessed in middle-aged offspring of dams with GDM.•Middle-aged offspring had greater mechanical sensitivity and lower intraepidermal CGRP+ and PGP9.5+ density.•GDM effects on middle-aged offspring are sex independent. While the long-term complications of gestational diabetes mellitus (GDM) in the cardiovascular, endocrine, and central nervous systems from offspring have been widely studied, less is known about the long-term outcomes of GDM on the peripheral nervous system. Thus, here we assessed the mechanical sensitivity and density of nerve fibers of the hind paw from middle-aged offspring born from dams with GDM. GDM was induced by the intraperitoneal administration of streptozotocin (STZ) in mouse dams. Mechanical sensitivity in male and female offspring was bi-weekly evaluated from week 18 to week 40 of age. At 40 weeks old, offspring were sacrificed and glabrous hind paw skin was processed for immunohistochemistry to determine the density of intraepidermal CGRP and PGP9.5 positive nerve fibers. Offspring mice born from STZ-treated dams had significantly greater mechanical sensitivity from 18 to 40 weeks of age compared to offspring born from vehicle-treated dams (control group). The density of intraepidermal CGRP+ and PGP9.5+ nerve fibers were significantly lower in the hind paw skin of female but not male offspring, born from STZ-treated dams versus the control group. These results suggest that GDM has long-term sex-dependent complications on the nociceptive system. Further studies are necessary to elucidate the mechanisms underlying the GDM-induced long-term consequences.