MODULATION OF SYMPATHOADRENERGIC CONTRACTIONS BY PERIVASCULAR ADIPOSE TISSUE IN MESENTERIC ARTERIES OF RATS WITH DIFFERENT LEVEL OF BODY ADIPOSITY

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985823%3A_____%2F20%3A00550886" target="_blank" >RIV/67985823:_____/20:00550886 - isvavai.cz</a>

Výsledek na webu

<a href="https://jpp.krakow.pl/journal/archive/08_20/pdf/10.26402/jpp.2020.4.14.pdf" target="_blank" >https://jpp.krakow.pl/journal/archive/08_20/pdf/10.26402/jpp.2020.4.14.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.26402/jpp.2020.4.14" target="_blank" >10.26402/jpp.2020.4.14</a>

Jazyk výsledku

angličtina

Název v původním jazyce

MODULATION OF SYMPATHOADRENERGIC CONTRACTIONS BY PERIVASCULAR ADIPOSE TISSUE IN MESENTERIC ARTERIES OF RATS WITH DIFFERENT LEVEL OF BODY ADIPOSITY

Popis výsledku v původním jazyce

Obesity is associated with increased sympathetic nervous system activation, possibly contributing to higher cardiovascular risk. The aim of this study was to assess the relationship between body adiposity and sympathoadrenergic contractions in rat isolated mesenteric arteries, and the modulatory effect of mesenteric perivascular adipose tissue (PVAT). Experiments were performed on male 38-week-old Wistar, Zucker lean (ZL) and Zucker diabetic fatty (ZDF) rats. Paired rings of isolated rat superior mesenteric arteries with or without PVAT were prepared and connected to a force-displacement transducer for the recording of isometric tension. Contractile responses were elicited by increasing doses of exogenous noradrenaline and by endogenous noradrenaline released during electrical stimulation of perivascular adrenergic nerves. In ZDF rats, mesenteric PVAT had marked anticontractile effect leading to significant reduction in adrenergic contractions of their superior mesenteric arteries, however, in arterial preparations without PVAT, obese rats showed significantly increased sensitivity in their contractile responses to adrenergic stimulation when compared to other rat groups. In Wistar rats, ranging in the level of body adiposity between ZL and ZDF rats, neurogenic contractions in arterial preparations with preserved PVAT were higher compared to those without PVAT. No vasomodulatory effect of PVAT was detected in mesenteric arteries from ZL rats. The results of this study indicate that the modulatory effect of mesenteric PVAT on arterial adrenergic contractions did not change in proportion with increasing adiposity, however, it could be influenced by the rat strain-specific distribution of sympathetic nerves between PVAT and the proper mesenteric arterial wall. In ZDF rats, characterized by higher vascular sympathetic tone, the mesenteric arteries might be specifically regulated by the anticontractile effect of PVAT, leading to higher mesenteric blood flow. This could be associated with hyperphagia and increased nutrient-induced mesenteric vasodilatation in this rat strain.

Název v anglickém jazyce

MODULATION OF SYMPATHOADRENERGIC CONTRACTIONS BY PERIVASCULAR ADIPOSE TISSUE IN MESENTERIC ARTERIES OF RATS WITH DIFFERENT LEVEL OF BODY ADIPOSITY

Popis výsledku anglicky

Obesity is associated with increased sympathetic nervous system activation, possibly contributing to higher cardiovascular risk. The aim of this study was to assess the relationship between body adiposity and sympathoadrenergic contractions in rat isolated mesenteric arteries, and the modulatory effect of mesenteric perivascular adipose tissue (PVAT). Experiments were performed on male 38-week-old Wistar, Zucker lean (ZL) and Zucker diabetic fatty (ZDF) rats. Paired rings of isolated rat superior mesenteric arteries with or without PVAT were prepared and connected to a force-displacement transducer for the recording of isometric tension. Contractile responses were elicited by increasing doses of exogenous noradrenaline and by endogenous noradrenaline released during electrical stimulation of perivascular adrenergic nerves. In ZDF rats, mesenteric PVAT had marked anticontractile effect leading to significant reduction in adrenergic contractions of their superior mesenteric arteries, however, in arterial preparations without PVAT, obese rats showed significantly increased sensitivity in their contractile responses to adrenergic stimulation when compared to other rat groups. In Wistar rats, ranging in the level of body adiposity between ZL and ZDF rats, neurogenic contractions in arterial preparations with preserved PVAT were higher compared to those without PVAT. No vasomodulatory effect of PVAT was detected in mesenteric arteries from ZL rats. The results of this study indicate that the modulatory effect of mesenteric PVAT on arterial adrenergic contractions did not change in proportion with increasing adiposity, however, it could be influenced by the rat strain-specific distribution of sympathetic nerves between PVAT and the proper mesenteric arterial wall. In ZDF rats, characterized by higher vascular sympathetic tone, the mesenteric arteries might be specifically regulated by the anticontractile effect of PVAT, leading to higher mesenteric blood flow. This could be associated with hyperphagia and increased nutrient-induced mesenteric vasodilatation in this rat strain.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30105 - Physiology (including cytology)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physiology and Pharmacology

ISSN

0867-5910

e-ISSN

—

Svazek periodika

71

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

8

Strana od-do

589-596

Kód UT WoS článku

000607230500014

EID výsledku v databázi Scopus

2-s2.0-85097814717