Vascular dysfunction programmed in male rats by topiramate during peripubertal period

• Published in: Life sciences (1973) Vol. 343; p. 122488
• Main Authors: Moura, Kawane F., Silva, Deborah Gomes da, Vidigal, Camila Borecki, Silva, Gabriel Smolak Sobieski e, Pinto, Ingrid Caroline, Simão, Andréa Name Colado, Marques, Bruno V.D., Andrade, Fábio Goulart de, Casagrande, Rúbia, Gerardin, Daniela C.C., Akamine, Eliana H., Franco, Maria do Carmo P., Ceravolo, Graziela S.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier Inc 15-04-2024
• Subjects: Acetylcholine - metabolism; Adolescent; Animals; Anticonvulsant; Antioxidants - metabolism; Antioxidants - pharmacology; Aorta, Thoracic - metabolism; Endothelial dysfunction; Endothelium, Vascular - metabolism; Male; Nitric Oxide - metabolism; Nitric Oxide Synthase Type III - metabolism; Oxidative Stress; Phenylephrine - pharmacology; Plasticity window; Rats; Superoxides - metabolism; Topiramate - pharmacology; Endothelial dysfunction; Plasticity window; Oxidative stress; Anticonvulsant; Adolescent
• ISSN: 0024-3205; 1879-0631
• DOI: 10.1016/j.lfs.2024.122488

The present study evaluated whether topiramate (TPM) treatment during the peripubertal period affects vascular parameters of male rats and whether oxidative stress plays a role in these changes.
Rats were treated with TPM (41 mg/kg/day, gavage) or vehicle (CTR group) from the postnatal day (PND) 28 to 50. At PND 51 and 120 the rats were evaluated for: thoracic aorta reactivity to phenylephrine, in the presence (Endo+) or absence of endothelium (Endo-), to acetylcholine and to sodium nitroprusside (SNP), aortic thickness and endothelial nitric oxide synthase (eNOS) expression. In serum were analyzed: the antioxidant capacity by ferric reducing antioxidant power assay; endogenous antioxidant reduced glutathione, and superoxide anion. Results were expressed as mean ± s.e.m., differences when p < 0.05. Statistics: Two-way ANOVA (and Tukey's) or Student t-test.
At PND 51, the contraction induced by phenylephrine in Endo+ ring was higher in TPM when compared to CTR. At PND 120, the aortic sensitivity to acetylcholine in TPM rats was reduced in comparison with CTR. The aortic eNOs expression and the aortic thickness were similar between the groups. At PND 51 and 120, TPM group presented a decrease in antioxidants when compared to CTR groups and at PND 120, in TPM group the superoxide anion was increased.
Taken together, the treatment of rats with TPM during peripubertal period promoted permanent impairment of endothelial function probably mediated by oxidative stress.