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Cystathionine gamma-lyase of perivascular adipose tissue with reversed regulatory effect in diabetic rat artery
The aim of this study is to reveal the regulatory role of cystathionine gamma-lyase (CSE), the main source of hydrogen sulphide (H(2)S) in perivascular adipose tissue (PVAT), of diabetic rats. Diabetes was induced in male rats by a single intraperitoneal injection of streptozotocin. Animals with glu...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Taylor & Francis
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4433913/ https://www.ncbi.nlm.nih.gov/pubmed/26019628 http://dx.doi.org/10.1080/13102818.2014.991565 |
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author | Emilova, Radoslava Dimitrova, Daniela Mladenov, Mitko Daneva, Teodora Schubert, Rudolf Gagov, Hristo |
author_facet | Emilova, Radoslava Dimitrova, Daniela Mladenov, Mitko Daneva, Teodora Schubert, Rudolf Gagov, Hristo |
author_sort | Emilova, Radoslava |
collection | PubMed |
description | The aim of this study is to reveal the regulatory role of cystathionine gamma-lyase (CSE), the main source of hydrogen sulphide (H(2)S) in perivascular adipose tissue (PVAT), of diabetic rats. Diabetes was induced in male rats by a single intraperitoneal injection of streptozotocin. Animals with glucose levels above 20 mmol/L were determined as diabetic. The rat gracilis arteries (a. gracilis) were dissected with or without PVAT. In all in vitro experiments endothelium-denuded preparations were used for isometric contraction measurements. Increasing concentrations of 5-hydroxytryptamine (5-HT) from 10(−10) to 10(−5) mol/L were applied to induce gradual increase in force of contractions of circular artery segments. The relaxing effect of CSE was inhibited by DL-propargyl glycine (PGG). The presence of PVAT decreases the contractile response to 5-HT of a. gracilis from control rats. This response is reversed in contraction studies in the same rat artery from diabetic rats. DL-PPG (1 mmol/L) induced significant increase of the force of contraction in artery preparations with PVAT from control rats in the whole range of 5-HT. In contrast, PGG had a relaxing effect in high concentrations of 5-HT (10(−6) and 10(−5) mol/L) in diabetic rat arteries with PVAT. It is concluded that in skeletal muscle artery from diabetic rats, a mediator related to H(2)S is released from PVAT. This paracrine mediator increases the maximal force of contraction of endothelium-denuded preparations at higher concentrations of 5-HT. |
format | Online Article Text |
id | pubmed-4433913 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Taylor & Francis |
record_format | MEDLINE/PubMed |
spelling | pubmed-44339132015-05-25 Cystathionine gamma-lyase of perivascular adipose tissue with reversed regulatory effect in diabetic rat artery Emilova, Radoslava Dimitrova, Daniela Mladenov, Mitko Daneva, Teodora Schubert, Rudolf Gagov, Hristo Biotechnol Biotechnol Equip Article; Medical Biotechnology The aim of this study is to reveal the regulatory role of cystathionine gamma-lyase (CSE), the main source of hydrogen sulphide (H(2)S) in perivascular adipose tissue (PVAT), of diabetic rats. Diabetes was induced in male rats by a single intraperitoneal injection of streptozotocin. Animals with glucose levels above 20 mmol/L were determined as diabetic. The rat gracilis arteries (a. gracilis) were dissected with or without PVAT. In all in vitro experiments endothelium-denuded preparations were used for isometric contraction measurements. Increasing concentrations of 5-hydroxytryptamine (5-HT) from 10(−10) to 10(−5) mol/L were applied to induce gradual increase in force of contractions of circular artery segments. The relaxing effect of CSE was inhibited by DL-propargyl glycine (PGG). The presence of PVAT decreases the contractile response to 5-HT of a. gracilis from control rats. This response is reversed in contraction studies in the same rat artery from diabetic rats. DL-PPG (1 mmol/L) induced significant increase of the force of contraction in artery preparations with PVAT from control rats in the whole range of 5-HT. In contrast, PGG had a relaxing effect in high concentrations of 5-HT (10(−6) and 10(−5) mol/L) in diabetic rat arteries with PVAT. It is concluded that in skeletal muscle artery from diabetic rats, a mediator related to H(2)S is released from PVAT. This paracrine mediator increases the maximal force of contraction of endothelium-denuded preparations at higher concentrations of 5-HT. Taylor & Francis 2015-01-02 2014-12-18 /pmc/articles/PMC4433913/ /pubmed/26019628 http://dx.doi.org/10.1080/13102818.2014.991565 Text en © 2014 The Author(s). Published by Taylor & Francis. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The moral rights of the named author(s) have been asserted. |
spellingShingle | Article; Medical Biotechnology Emilova, Radoslava Dimitrova, Daniela Mladenov, Mitko Daneva, Teodora Schubert, Rudolf Gagov, Hristo Cystathionine gamma-lyase of perivascular adipose tissue with reversed regulatory effect in diabetic rat artery |
title | Cystathionine gamma-lyase of perivascular adipose tissue with reversed regulatory effect in diabetic rat artery |
title_full | Cystathionine gamma-lyase of perivascular adipose tissue with reversed regulatory effect in diabetic rat artery |
title_fullStr | Cystathionine gamma-lyase of perivascular adipose tissue with reversed regulatory effect in diabetic rat artery |
title_full_unstemmed | Cystathionine gamma-lyase of perivascular adipose tissue with reversed regulatory effect in diabetic rat artery |
title_short | Cystathionine gamma-lyase of perivascular adipose tissue with reversed regulatory effect in diabetic rat artery |
title_sort | cystathionine gamma-lyase of perivascular adipose tissue with reversed regulatory effect in diabetic rat artery |
topic | Article; Medical Biotechnology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4433913/ https://www.ncbi.nlm.nih.gov/pubmed/26019628 http://dx.doi.org/10.1080/13102818.2014.991565 |
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