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Differential effects of statins on endogenous H2S formation in perivascular adipose tissue.
Pharmacol Res. 2011 Jan; 63(1):68-76.PR

Abstract

Hydrogen sulfide (H(2)S) is a new gasotransmitter synthesized enzymatically from l-cysteine in cytosol and is oxidized in mitochondria. In the cardiovascular system, H(2)S regulates vascular tone, inhibits atherogenesis, and protects against myocardial ischemia-reperfusion injury. We examined the effect of statins on vascular H(2)S production. Male Wistar rats received pravastatin (40mg/kg/day) or atorvastatin (20mg/kg/day) for 3 weeks and then H(2)S formation was measured in aortic media, periaortic adipose tissue (PAAT) and the liver. Only atorvastatin increased H(2)S production in PAAT whereas both statins stimulated its formation in the liver. Neither statin affected H(2)S production in aortic media. H(2)S formation in post-mitochondrial supernatant was higher than in mitochondria-containing supernatant and was not influenced by statins in any tissue. In addition, oxidation of exogenous H(2)S in isolated liver mitochondria was slower in statin-treated than in control rats. These data indicate that statins increase net H(2)S production by inhibiting its mitochondrial oxidation. Statins had no effect on the activity of H(2)S-metabolizing enzyme, sulfide:quinone oxidoreductase, measured at saturating coenzyme Q concentration. Both statins reduced CoQ(9) concentration in plasma and liver, but only atorvastatin decreased CoQ(9) in PAAT. Atorvastatin attenuated phenylephrine-induced contraction of PAAT+ but not of PAAT- aortic rings. Effects of atorvastatin on net H(2)S production, mitochondrial H(2)S oxidation and aortic contractility were abolished by supplementation of exogenous CoQ(9). In conclusion, lipophilic atorvastatin, but not hydrophilic pravastatin, increases net H(2)S production in perivascular adipose tissue by inhibiting its mitochondrial oxidation. This effect is mediated by statin-induced CoQ(9) deficiency and results in the augmentation of anticontractile effect of perivascular adipose tissue.

Authors+Show Affiliations

Department of Pathophysiology, Medical University, Jaczewskiego 8, 20-090 Lublin, Poland.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

20969959

Citation

Wójcicka, Grażyna, et al. "Differential Effects of Statins On Endogenous H2S Formation in Perivascular Adipose Tissue." Pharmacological Research, vol. 63, no. 1, 2011, pp. 68-76.
Wójcicka G, Jamroz-Wiśniewska A, Atanasova P, et al. Differential effects of statins on endogenous H2S formation in perivascular adipose tissue. Pharmacol Res. 2011;63(1):68-76.
Wójcicka, G., Jamroz-Wiśniewska, A., Atanasova, P., Chaldakov, G. N., Chylińska-Kula, B., & Bełtowski, J. (2011). Differential effects of statins on endogenous H2S formation in perivascular adipose tissue. Pharmacological Research, 63(1), 68-76. https://doi.org/10.1016/j.phrs.2010.10.011
Wójcicka G, et al. Differential Effects of Statins On Endogenous H2S Formation in Perivascular Adipose Tissue. Pharmacol Res. 2011;63(1):68-76. PubMed PMID: 20969959.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Differential effects of statins on endogenous H2S formation in perivascular adipose tissue. AU - Wójcicka,Grażyna, AU - Jamroz-Wiśniewska,Anna, AU - Atanasova,Pepa, AU - Chaldakov,George N, AU - Chylińska-Kula,Beata, AU - Bełtowski,Jerzy, Y1 - 2010/10/20/ PY - 2010/09/28/received PY - 2010/10/13/revised PY - 2010/10/13/accepted PY - 2010/10/26/entrez PY - 2010/10/26/pubmed PY - 2011/5/10/medline SP - 68 EP - 76 JF - Pharmacological research JO - Pharmacol Res VL - 63 IS - 1 N2 - Hydrogen sulfide (H(2)S) is a new gasotransmitter synthesized enzymatically from l-cysteine in cytosol and is oxidized in mitochondria. In the cardiovascular system, H(2)S regulates vascular tone, inhibits atherogenesis, and protects against myocardial ischemia-reperfusion injury. We examined the effect of statins on vascular H(2)S production. Male Wistar rats received pravastatin (40mg/kg/day) or atorvastatin (20mg/kg/day) for 3 weeks and then H(2)S formation was measured in aortic media, periaortic adipose tissue (PAAT) and the liver. Only atorvastatin increased H(2)S production in PAAT whereas both statins stimulated its formation in the liver. Neither statin affected H(2)S production in aortic media. H(2)S formation in post-mitochondrial supernatant was higher than in mitochondria-containing supernatant and was not influenced by statins in any tissue. In addition, oxidation of exogenous H(2)S in isolated liver mitochondria was slower in statin-treated than in control rats. These data indicate that statins increase net H(2)S production by inhibiting its mitochondrial oxidation. Statins had no effect on the activity of H(2)S-metabolizing enzyme, sulfide:quinone oxidoreductase, measured at saturating coenzyme Q concentration. Both statins reduced CoQ(9) concentration in plasma and liver, but only atorvastatin decreased CoQ(9) in PAAT. Atorvastatin attenuated phenylephrine-induced contraction of PAAT+ but not of PAAT- aortic rings. Effects of atorvastatin on net H(2)S production, mitochondrial H(2)S oxidation and aortic contractility were abolished by supplementation of exogenous CoQ(9). In conclusion, lipophilic atorvastatin, but not hydrophilic pravastatin, increases net H(2)S production in perivascular adipose tissue by inhibiting its mitochondrial oxidation. This effect is mediated by statin-induced CoQ(9) deficiency and results in the augmentation of anticontractile effect of perivascular adipose tissue. SN - 1096-1186 UR - https://www.unboundmedicine.com/medline/citation/20969959/Differential_effects_of_statins_on_endogenous_H2S_formation_in_perivascular_adipose_tissue_ DB - PRIME DP - Unbound Medicine ER -