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Resveratrol and curcumin enhance pancreatic β-cell function by inhibiting phosphodiesterase activity

Resveratrol (RES) and curcumin (CUR) are polyphenols that are found in fruits and turmeric, and possess medicinal properties that are beneficial in various diseases, such as heart disease, cancer, and type 2 diabetes mellitus (T2DM). Results from recent studies have indicated that their therapeutic...

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Autores principales: Rouse, Michael, Younès, Antoine, Egan, Josephine M
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Bioscientifica Ltd 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4191183/
https://www.ncbi.nlm.nih.gov/pubmed/25297556
http://dx.doi.org/10.1530/JOE-14-0335
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author Rouse, Michael
Younès, Antoine
Egan, Josephine M
author_facet Rouse, Michael
Younès, Antoine
Egan, Josephine M
author_sort Rouse, Michael
collection PubMed
description Resveratrol (RES) and curcumin (CUR) are polyphenols that are found in fruits and turmeric, and possess medicinal properties that are beneficial in various diseases, such as heart disease, cancer, and type 2 diabetes mellitus (T2DM). Results from recent studies have indicated that their therapeutic properties can be attributed to their anti-inflammatory effects. Owing to reports stating that they protect against β-cell dysfunction, we studied their mechanism(s) of action in β-cells. In T2DM, cAMP plays a critical role in glucose- and incretin-stimulated insulin secretion as well as overall pancreatic β-cell health. A potential therapeutic target in the management of T2DM lies in regulating the activity of phosphodiesterases (PDEs), which degrade cAMP. Both RES and CUR have been reported to act as PDE inhibitors in various cell types, but it remains unknown if they do so in pancreatic β-cells. In our current study, we found that both RES (0.1–10 μmol/l) and CUR (1–100 pmol/l)-regulated insulin secretion under glucose-stimulated conditions. Additionally, treating β-cell lines and human islets with these polyphenols led to increased intracellular cAMP levels in a manner similar to 3-isobutyl-1-methylxanthine, a classic PDE inhibitor. When we investigated the effects of RES and CUR on PDEs, we found that treatment significantly downregulated the mRNA expression of most of the 11 PDE isozymes, including PDE3B, PDE8A, and PDE10A, which have been linked previously to regulation of insulin secretion in islets. Furthermore, RES and CUR inhibited PDE activity in a dose-dependent manner in β-cell lines and human islets. Collectively, we demonstrate a novel role for natural-occurring polyphenols as PDE inhibitors that enhance pancreatic β-cell function.
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spelling pubmed-41911832014-11-01 Resveratrol and curcumin enhance pancreatic β-cell function by inhibiting phosphodiesterase activity Rouse, Michael Younès, Antoine Egan, Josephine M J Endocrinol Research Resveratrol (RES) and curcumin (CUR) are polyphenols that are found in fruits and turmeric, and possess medicinal properties that are beneficial in various diseases, such as heart disease, cancer, and type 2 diabetes mellitus (T2DM). Results from recent studies have indicated that their therapeutic properties can be attributed to their anti-inflammatory effects. Owing to reports stating that they protect against β-cell dysfunction, we studied their mechanism(s) of action in β-cells. In T2DM, cAMP plays a critical role in glucose- and incretin-stimulated insulin secretion as well as overall pancreatic β-cell health. A potential therapeutic target in the management of T2DM lies in regulating the activity of phosphodiesterases (PDEs), which degrade cAMP. Both RES and CUR have been reported to act as PDE inhibitors in various cell types, but it remains unknown if they do so in pancreatic β-cells. In our current study, we found that both RES (0.1–10 μmol/l) and CUR (1–100 pmol/l)-regulated insulin secretion under glucose-stimulated conditions. Additionally, treating β-cell lines and human islets with these polyphenols led to increased intracellular cAMP levels in a manner similar to 3-isobutyl-1-methylxanthine, a classic PDE inhibitor. When we investigated the effects of RES and CUR on PDEs, we found that treatment significantly downregulated the mRNA expression of most of the 11 PDE isozymes, including PDE3B, PDE8A, and PDE10A, which have been linked previously to regulation of insulin secretion in islets. Furthermore, RES and CUR inhibited PDE activity in a dose-dependent manner in β-cell lines and human islets. Collectively, we demonstrate a novel role for natural-occurring polyphenols as PDE inhibitors that enhance pancreatic β-cell function. Bioscientifica Ltd 2014-11 /pmc/articles/PMC4191183/ /pubmed/25297556 http://dx.doi.org/10.1530/JOE-14-0335 Text en © 2014 The authors http://creativecommons.org/licenses/by/3.0/deed.en_GB This work is licensed under a Creative Commons Attribution 3.0 Unported License (http://creativecommons.org/licenses/by/3.0/deed.en_GB)
spellingShingle Research
Rouse, Michael
Younès, Antoine
Egan, Josephine M
Resveratrol and curcumin enhance pancreatic β-cell function by inhibiting phosphodiesterase activity
title Resveratrol and curcumin enhance pancreatic β-cell function by inhibiting phosphodiesterase activity
title_full Resveratrol and curcumin enhance pancreatic β-cell function by inhibiting phosphodiesterase activity
title_fullStr Resveratrol and curcumin enhance pancreatic β-cell function by inhibiting phosphodiesterase activity
title_full_unstemmed Resveratrol and curcumin enhance pancreatic β-cell function by inhibiting phosphodiesterase activity
title_short Resveratrol and curcumin enhance pancreatic β-cell function by inhibiting phosphodiesterase activity
title_sort resveratrol and curcumin enhance pancreatic β-cell function by inhibiting phosphodiesterase activity
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4191183/
https://www.ncbi.nlm.nih.gov/pubmed/25297556
http://dx.doi.org/10.1530/JOE-14-0335
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