P154 Effect of Vitamin D Deficiency on Insulin Induced Vasodilatation and Receptor Expression in Rat Model of Polycystic Ovary Syndrome

DOI

10.2991/artres.k.191224.174How to use a DOI?

Abstract

In polycystic ovary syndrome (PCOS) hyperandrogenism and metabolic dysfunction increase cardiovascular risk. Vitamin D3 deficiency is a common comorbidity in PCOS. Our aim was to examine the alterations of insulin-induced vasodilation and receptor expression in rat aorta in a PCOS model.

Methods: Female Wistar rats were treated as follows: 1. vitamin D supplemented group (D+T−); 2. vitamin D deficient (D−T−), 3. vitamin D supplemented with transdermal testosterone application (D+T+) and 4. vitamin D deficient with transdermal testosterone (D−T+). Wire myograph was used for testing insulin relaxation of aorta rings in physiological salt solution and under NOS inhibition. Insulin (IR) and vitamin D receptor (VDR) density was examined by immunohistochemistry.

Results: Insulin-induced vasodilatation of the aorta rings were significantly lower in both vitamin deficient compared to the vitamin supplemented groups (p < 0.05). NOS inhibition significantly reduce the relaxation. Aorta endothelial IR expression was significantly higher in the vitamin D deficient group, meanwhile in the testosterone-treated groups (D+T+; D−T+) the expression was significantly lower (Area%: D+: 0.830 ± 0.10; D+T+: 0.298 ± 0.06; D−: 1.364 ± 0.12; D−T+: 0.354 ± 0.15, p < 0.05 in D− & D+T+ & D−T+ vs D+. p < 0.01 D+T+ & D−T+ vs D−). VDR density was significantly higher in the vitamin D deficient groups in comparison to the supplemented groups (Area% VDR: D+: 41.56 ± 5.58 vs D−: 60.63 ± 5.23) Testosterone treatment have not any effect on VDR expression.

Conclusion: Vitamin-D deficiency causes impaired insulin induced vasodilation. Increased IR density could not compensate altered insulin-induced relaxation.

Copyright

© 2019 Association for Research into Arterial Structure and Physiology. Publishing services by Atlantis Press International B.V.

Open Access

This is an open access article distributed under the CC BY-NC 4.0 license (http://creativecommons.org/licenses/by-nc/4.0/).

TY  - JOUR
AU  - Bálint Bányai
AU  - Benko Rita
AU  - Tarszabó Róbert
AU  - Lajtai Krisztina
AU  - Horváth Eszter Mária
AU  - Várbíró Szabolcs
PY  - 2020
DA  - 2020/02/17
TI  - P154 Effect of Vitamin D Deficiency on Insulin Induced Vasodilatation and Receptor Expression in Rat Model of Polycystic Ovary Syndrome
JO  - Artery Research
SP  - S192
EP  - S192
VL  - 25
IS  - Supplement 1
SN  - 1876-4401
UR  - https://doi.org/10.2991/artres.k.191224.174
DO  - 10.2991/artres.k.191224.174
ID  - Bányai2020
ER  -