stilbenes has been researched along with Hypertrophy* in 16 studies
16 other study(ies) available for stilbenes and Hypertrophy
Article | Year |
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Resveratrol, a SIRT1 activator, attenuates aging-associated alterations in skeletal muscle and heart in mice.
Topics: Aging; Animals; Hypertrophy; Mice; Muscle, Skeletal; Myocytes, Cardiac; Resveratrol; Sarcopenia; Sirtuin 1; Stilbenes | 2023 |
Retinoic acid signaling is essential for airway smooth muscle homeostasis.
Airway smooth muscle (ASM) is a dynamic and complex tissue involved in regulation of bronchomotor tone, but the molecular events essential for the maintenance of ASM homeostasis are not well understood. Observational and genome-wide association studies in humans have linked airway function to the nutritional status of vitamin A and its bioactive metabolite retinoic acid (RA). Here, we provide evidence that ongoing RA signaling is critical for the regulation of adult ASM phenotype. By using dietary, pharmacologic, and genetic models in mice and humans, we show that (a) RA signaling is active in adult ASM in the normal lung, (b) RA-deficient ASM cells are hypertrophic, hypercontractile, profibrotic, but not hyperproliferative, (c) TGF-β signaling, known to cause ASM hypertrophy and airway fibrosis in human obstructive lung diseases, is hyperactivated in RA-deficient ASM, (d) pharmacologic and genetic inhibition of the TGF-β activity in ASM prevents the development of the aberrant phenotype induced by RA deficiency, and (e) the consequences of transient RA deficiency in ASM are long-lasting. These results indicate that RA signaling actively maintains adult ASM homeostasis, and disruption of RA signaling leads to aberrant ASM phenotypes similar to those seen in human chronic airway diseases such as asthma. Topics: Adult; Animals; Benzoates; Cells, Cultured; Disease Models, Animal; Female; Fibrosis; Humans; Hypertrophy; Lung; Lung Diseases, Obstructive; Male; Mice; Mice, Transgenic; Muscle, Smooth; Myocytes, Smooth Muscle; Primary Cell Culture; Receptors, Retinoic Acid; Signal Transduction; Stilbenes; Tretinoin | 2018 |
Resveratrol prevents angiotensin II-induced hypertrophy of vascular smooth muscle cells through the transactivation of growth factor receptors.
We previously showed that augmented levels of endogenous angiotensin II (AngII) contribute to vascular smooth muscle cell (VSMC) hypertrophy through the transactivation of growth factor receptors in spontaneously hypertensive rats. Resveratrol (RV), a polyphenolic component of red wine, has also been shown to attenuate AngII-evoked VSMC hypertrophy; however, the molecular mechanism mediating this response is obscure. The present study was therefore undertaken to examine whether RV could prevent AngII-induced VSMC hypertrophy through the transactivation of growth factor receptor and associated signaling pathways. AngII treatment of VSMC enhanced the protein synthesis that was attenuated towards control levels by RV pretreatment as well as by the inhibitors of NADPH oxidase, c-Src, and growth factor receptors. Furthermore, RV pretreatment also inhibited enhanced levels of superoxide anion, NADPH oxidase activity, increased expression of NADPH oxidase subunits, and phosphorylation of c-Src, EGF-R, PDGE-R, ERK1/2, and AKT1/2. In conclusion, these results indicate that RV attenuates AngII-induced VSMC hypertrophy through the inhibition of enhanced oxidative stress and activation of c-Src, growth factor receptors, and MAPK/AKT signaling. We suggest that RV could be used as a therapeutic agent in the treatment of vascular complications associated with hypertension and hypertrophy. Topics: Angiotensin II; Animals; Antihypertensive Agents; Cell Line; CSK Tyrosine-Protein Kinase; Enzyme Activation; Hypertrophy; Male; Muscle, Smooth, Vascular; Oxidative Stress; Rats; Rats, Sprague-Dawley; Receptors, Growth Factor; Resveratrol; Signal Transduction; src-Family Kinases; Stilbenes; Transcriptional Activation | 2017 |
Blunted hypertrophic response in old mouse muscle is associated with a lower satellite cell density and is not alleviated by resveratrol.
Sarcopenia contributes to the decreased quality of life in the older person. While resistance exercise is an effective measure to increase muscle mass and strength, the hypertrophic response may be blunted in old age.. To determine 1) whether hypertrophy in the m. plantaris of old mice was blunted compared to adult and 2) whether this was related to a reduced satellite cell (SC) density and 3) how resveratrol affects hypertrophy in old mice.. In adult (7.5 months, n=11), old (23.5 months, n=10) and old-resveratrol-treated (n=10) male C57BL/6J mice, hypertrophy of the left m. plantaris was induced by denervation of its synergists. The contralateral leg served as control.. After six weeks, overload-induced myofiber hypertrophy and IIB-IIA shift in myofiber type composition were less pronounced in old than adult mice (P=0.03), irrespective of resveratrol treatment. Muscles from old mice had a lower SC density than adult muscles (P=0.002). Overload-induced SC proliferation (P<0.05) resulted in an increased SC density in old, but not adult muscles (P=0.02), while a decrease occurred after resveratrol supplementation (P=0.044). Id2 and myogenin protein expression levels were higher in old than adult muscles (P<0.05). Caspase-3 was expressed more in hypertrophied than control muscles and was reduced with resveratrol (P<0.05).. The blunted hypertrophic response in old mice was associated with a lower SC density, but there was no evidence for a lower capacity for proliferation. Resveratrol did not rescue the hypertrophic response and even reduced, rather than increased, the number of SCs in hypertrophied muscles. Topics: Aging; Animals; Anti-Inflammatory Agents, Non-Steroidal; Cell Count; Cell Differentiation; Cell Proliferation; Hypertrophy; Male; Mice, Inbred C57BL; Muscle Proteins; Muscle, Skeletal; Resveratrol; Satellite Cells, Skeletal Muscle; Stilbenes | 2015 |
Cardioprotective effect of polydatin on ventricular remodeling after myocardial infarction in coronary artery ligation rats.
The purpose of this study was to explore the effect of polydatin on ventricular remodeling after myocardial infarction in coronary artery ligation rats and to elucidate the underlying mechanisms. A rat model of ventricular remodeling after myocardial infarction was established by left coronary artery ligation. Rats with coronary artery ligation were randomly divided into five groups: control, plus 40 mg/kg captopril, plus 25 mg/kg polydatin, plus 50 mg/kg polydatin, and plus 100 mg/kg polydatin. The sham-operated group was used as a negative control. Rats were administered intragastrically with the corresponding drugs or drinking water for seven weeks. At the end of the treatment, the left ventricular weight index and heart weight index were assessed. The cross-sectional size of cardiomyocytes was measured by staining myocardium tissue with hematoxylin and eosin. Collagen content was counted by Sirius red in aqueous saturated picric acid. The concentrations of angiotensin I, angiotensin II, aldosterone, and endothelin 1 in myocardium or serum were determined by radioimmunoassay. Hydroxyproline and nitric oxide concentrations and glutathione peroxidase and catalase activities in serum were measured by ultraviolet spectrophotometry. Our results showed that seven weeks of polydatin treatment resulted in a significantly reduced left ventricular weight index, heart weight index, serum concentrations of hydroxyproline and aldosterone, an increased concentration of nitric oxide as well as enhanced activities of glutathione peroxidase and catalase. Myocardial angiotensin I, angiotensin II, and endothelin 1 levels were also reduced. The cardiomyocyte cross-sectional area and collagen deposition diminished. This study suggests that polydatin may attenuate ventricular remodeling after myocardial infarction in coronary artery ligation rats through restricting the excessive activation of the renin-angiotensin-aldosterone system and inhibiting peroxidation. Topics: Aldosterone; Animals; Antioxidants; Captopril; Collagen; Coronary Occlusion; Coronary Vessels; Endothelin-1; Glucosides; Heart Ventricles; Hydroxyproline; Hypertrophy; Male; Myocardial Infarction; Myocardium; Myocytes, Cardiac; Nitric Oxide; Phytotherapy; Plant Extracts; Polygonum; Rats, Sprague-Dawley; Renin-Angiotensin System; Stilbenes; Ventricular Remodeling | 2015 |
[Effect of resveratrol on aniogtensin II induced cardiomyocytes hypertrophy and FoxO1/MnSOD signaling pathway].
To investigate the effect of resveratrol (RSV) on angiotensin II (Ang II) induced cardiomyocytes hypertrophy and FoxO1/MnSOD signaling pathway.. The cardiomyocytes isolated from neonatal Wistar rats were cultured with pancreatin and preplating technique and divided into five groups: control (CON), Ang II (1 x 10(-6) mol/L, Ang II), Ang II + RSV (10 µmol/L), Ang II + RSV (25 µmol/L), and Ang II + RSV (50 µmol/L). 3H-Leucine incorporation method were used to determine the cardiomyocyte protein synthesis rate. Cell size was measured by phase contrast microscope. The gene expression of A type natriuretic factor (ANF) was detected by real-time PCR. Western blot was used to measure the expression of MnSOD, FoxO1 and acety-FoxO1. Immunoprecipitation was used to detect the interaction between Sirt1 and FoxO1.. Cardiomyocyte protein synthesis rate in Ang II group was significantly higher in Ang II group than in the control group ((1,971 ± 175) cpm vs. (1,216 ± 136) cpm, P < 0.05), which could be significantly attenuated by RSV (10 µmol/L, 25 µmol/L, 50 µmol/L, all P < 0.05), especially in Ang II + RSV (25 µmol/L) group( (1,374 ± 143) cpm). Cardiomyocytes size in Ang II group was significantly larger than control group ((29.3 ± 3.2) µm vs. (19.4 ± 1.8) µm, P < 0.05), which could be significantly reduced by cotreatment with RSV (10 µmol/L, 25 µmol/L, 50 µmol/L, all P < 0.05), especially in Ang I + RSV (25 µmol/L) group ((20.8 ± 2.1) µm). Ang II also significantly upregulated ANP mRNA expression of cardiomyocytes (4.4 ± 0.4 vs. 1.0 ± 0.1 in control group, P < 0.05), which could be significantly inhibited by cotreatment with RSV, especially in Ang II + RSV (25 µmol/L) group (2.2 ± 0.2). Ang II significantly decreased MnSOD expression of cardiomyocytes compared with control group (P < 0.05), which was reversed by RSV (25 µmol/L). The binding level of Sirt1 and FoxO1 was significantly lower (1.00 ± 0.11 vs. 1.63 ± 0.16, P < 0.05), and the expression of acetylation of FoxO1 was significantly higher in Ang II group than in control group (1.48 ± 0.16 vs. 1.00 ± 0.13, P < 0.05), which was significantly reversed by cotreatment with RSV (25 µmol/L).. Resveratrol treatment can inhibit Ang II induced cardiomyocyte hypertrophy. This protective effect is associated with reduced FoxO1 acetylation and activation of Sirt1, suggesting that Sirt1 may serve as a potential therapeutic target of cardiomyocyte hypertrophy. Topics: Angiotensin II; Animals; Animals, Newborn; Forkhead Transcription Factors; Hypertrophy; Myocytes, Cardiac; Nerve Tissue Proteins; Rats; Rats, Wistar; Resveratrol; Signal Transduction; Stilbenes; Superoxide Dismutase | 2015 |
[Effect and mechanism of polydatin on diabetic myocardial hypertrophy in mice].
To observe the preventive effect of polydatin on diabetic myocardial hypertrophy in mice and discuss its and mechanism. The diabetic model was induced with low dose STZ (40 mg x kg(-1) x d(-1) x 5 d, ip) for five days in mice. The myocardial hypertrophy was determined by hypertrophy indexes (LVHI, left ventricular/right ventricle and septum), left ventricular/body weight (LV/BW), the histological examination and the mRNA expression of atrial natriuretic factor(ANF). The fast blood glucose(FBG), serum insulin and plasma hemoglobin A1c ( HbA1c) levels were detected, and then HOMA insulin resistance index ( HOMA. IR) was calculated. The mRNA and protein expressions were measured by qRT-PCR and western blotting, respectively. According to the results, the FBG of the model group exceeded 11.1 mmol x L(-1), with notable decrease in BW and significant increase in insulin, HbA1c and HOME. IR, suggesting the successful establishment and stability of the diabetic model. The increases in LVHI, LV/BW, cell surface and ANF mRNA indicated a myocardial hypertrophy in diabetic mice. Meanwhile, the model group showed decrease in mRNA and protein expressions of PPARβ and significant increase in NF-κB p65, COX-2 and iNOS expressions. After the preventation with PD (50, 100 mg x kg(-1) x d(-1)), diabetic mice showed increase in BW, reduction in the levels of FBG, insulin and HbA1 c, relief in insulin resistance and significant recovery in hypertrophy indexes, indicating PD has the protective effect in diabetic myocardial hypertrophy. Meanwhile, PD up-regulated the expression of PPARβ, inhibited the expressions of NF-κB p65, COX-2 and iNOS, demonstrating that PD's protective effect may be related to the activation of PPARβ and the inhibition of NF-κB, COX-2 and iNOS signaling pathways. Topics: Animals; Diabetes Mellitus, Experimental; Diabetic Cardiomyopathies; Drugs, Chinese Herbal; Glucosides; Humans; Hypertrophy; Insulin; Male; Mice; NF-kappa B; Signal Transduction; Stilbenes | 2015 |
Cytochrome P450 1B1 contributes to increased blood pressure and cardiovascular and renal dysfunction in spontaneously hypertensive rats.
We investigated the contribution of cytochrome P450 (CYP) 1B1 to hypertension and its pathogenesis by examining the effect of its selective inhibitor, 2,4,3',5'-tetramethoxystilbene (TMS), in spontaneously hypertensive rats (SHR).. Blood pressure (BP) was measured bi-weekly. Starting at 8 weeks, TMS (600 μg/kg, i.p.) or its vehicle was injected daily. At 14 weeks, samples were collected for measurement.. TMS reversed increased BP in SHR (207 ± 7 vs. 129 ± 2 mmHg) without altering BP in Wistar-Kyoto rats. Increased CYP1B1 activity in SHR was inhibited by TMS (RLU: aorta, 5.4 ± 0.7 vs. 3.7 ± 0.7; heart, 6.0 ± 0.8 vs. 3.4 ± 0.4; kidney, 411 ± 45 vs. 246 ± 10). Increased vascular reactivity, cardiovascular hypertrophy, endothelial and renal dysfunction, cardiac and renal fibrosis in SHR were minimized by TMS. Increased production of reactive oxygen species and NADPH oxidase activity in SHR, were diminished by TMS. In SHR, TMS reduced increased plasma levels of nitrite/nitrate (46.4 ± 5.0 vs. 28.1 ± 4.1 μM), hydrogen-peroxide (36.0 ± 3.7 vs. 14.1 ± 3.8 μM), and thiobarbituric acid reactive substances (6.9 ± 1.0 vs. 3.4 ± 1.5 μM). Increased plasma levels of pro-inflammatory cytokines and catecholamines, and cardiac activity of extracellular signal-regulated kinase, p38 mitogen-activated protein kinase, c-Src tyrosine kinase, and protein kinase B in SHR were also inhibited by TMS.. These data suggests that increased oxidative stress generated by CYP1B1 contributes to hypertension, increased cytokine production and sympathetic activity, and associated pathophysiological changes in SHR. CYP1B1 could be a novel target for developing drugs to treat hypertension and its pathogenesis. Topics: Animals; Aryl Hydrocarbon Hydroxylases; Blood Pressure; Cardiovascular System; Catecholamines; Cytochrome P-450 CYP1B1; Cytokines; Endothelium, Vascular; Fibrosis; Genes, src; Hydrogen Peroxide; Hypertension; Hypertrophy; Kidney; Kidney Diseases; Male; MAP Kinase Signaling System; Mitogen-Activated Protein Kinases; Muscle, Smooth; NADPH Oxidases; Proto-Oncogene Proteins c-akt; Rats; Rats, Inbred SHR; Rats, Inbred WKY; Reactive Oxygen Species; Stilbenes; Superoxides; Thiobarbituric Acid Reactive Substances | 2014 |
Resveratrol promotes myogenesis and hypertrophy in murine myoblasts.
Nutrigenomics elucidate the ability of bioactive food components to influence gene expression, protein synthesis, degradation and post-translational modifications.Resveratrol (RSV), natural polyphenol found in grapes and in other fruits, has a plethora of health benefits in a variety of human diseases: cardio- and neuroprotection, immune regulation, cancer chemoprevention, DNA repair, prevention of mitochondrial disorder, avoidance of obesity-related diseases. In skeletal muscle, RSV acts on protein catabolism and muscle function, conferring resistance against oxidative stress, injury and cell death, but its action mechanisms and protein targets in myogenesis process are not completely known. Myogenesis is a dynamic multistep process regulated by Myogenic Regulator Factors (MRFs), responsible of the commitment of myogenic cell into skeletal muscle: mononucleated undifferentiated myoblasts break free from cell cycle, elongate and fuse to form multinucleated myotubes. Skeletal muscle hypertrophy can be defined as a result of an increase in the size of pre-existing skeletal muscle fibers accompanied by increased protein synthesis, mainly regulated by Insulin Like Growth Factor 1 (IGF-1), PI3-K/AKT signaling pathways.Aim of this work was the study of RSV effects on proliferation, differentiation process and hypertrophy in C2C12 murine cells.. To study proliferative phase, cells were incubated in growth medium with/without RSV (0.1 or 25 μM) until reaching sub confluence condition (24, 48, 72 h). To examine differentiation, at 70% confluence, cells were transferred in differentiation medium both with/without RSV (0.1 or 25 μM) for 24, 48, 72, 96 hours. After 72 hours of differentiation, the genesis of hypertrophy in neo-formed myotubes was analyzed.. Data showed that RSV regulates cell cycle exit and induces C2C12 muscle differentiation. Furthermore, RSV might control MRFs and muscle-specific proteins synthesis. In late differentiation, RSV has positive effects on hypertrophy: RSV stimulates IGF-1 signaling pathway, in particular AKT and ERK 1/2 protein activation, AMPK protein level and induces hypertrophic morphological changes in neo-formed myotubes modulating cytoskeletal proteins expression.. RSV might control cell cycle promoting myogenesis and hypertrophy in vitro, opening a novel field of application of RSV in clinical conditions characterized by chronic functional and morphological muscle impairment. Topics: Animals; Cell Differentiation; Cell Line, Transformed; Cell Proliferation; Electrophoresis, Polyacrylamide Gel; Fluorescent Antibody Technique; Hypertrophy; Mice; Muscle Development; Myoblasts; Resveratrol; Stilbenes | 2013 |
Resveratrol prevents norepinephrine induced hypertrophy in adult rat cardiomyocytes, by activating NO-AMPK pathway.
Increased adrenergic drive is a major factor influencing the development of pathological cardiac hypertrophy, a stage which precedes overt heart failure. We examined the effect of resveratrol, a polyphenol (found predominantly in grapes), in preventing norepinephrine induced hypertrophy of adult cardiomyocyte, and the role of nitric oxide (NO) and adenosine monophosphate kinase (AMPK) in the effects of resveratrol. Cardiomyocytes isolated from adult rats were pretreated, or not, with resveratrol and then exposed to norepinephrine for 24h. In other experiments cardiomyocytes were also treated with different pharmacological inhibitors of NO synthase, AMPK and sirtuin for elucidating the signaling pathways underlying the effect of resveratrol. In order to validate the role of these signaling molecules in the in vivo settings, we also examined hearts from resveratrol treated spontaneously hypertensive rats (SHR), a genetic model of essential hypertension. Cardiomyocyte hypertrophy was determined by morphometry and (3)H-phenylalanine incorporation assay. NO levels and AMPK activity were measured using a specific assay kit and western blot analysis respectively. In vitro, resveratrol prevented the norepinephrine-induced increase in cardiomyocytes size and protein synthesis. Pharmacological inhibition of NO-AMPK signaling abolished the anti-hypertrophic action of resveratrol. Consistent with the in vitro findings, the anti-hypertrophic effect of resveratrol in the SHR model was associated with increases in NO and AMPK activity. This study demonstrates that NO-AMPK signaling is linked to the anti-hypertrophic effect of resveratrol in adult cardiomyocytes in vitro, and in the SHR model in vivo. Topics: Adenylate Kinase; Animals; Cell Size; Hypertrophy; Male; Myocytes, Cardiac; NG-Nitroarginine Methyl Ester; Niacinamide; Nitric Oxide; Norepinephrine; Protein Biosynthesis; Pyrazoles; Pyrimidines; Rats; Rats, Inbred SHR; Rats, Sprague-Dawley; Resveratrol; S-Nitroso-N-Acetylpenicillamine; Signal Transduction; Stilbenes | 2011 |
Resveratrol attenuates renal hypertrophy in early-stage diabetes by activating AMPK.
Recent studies suggest the involvement of the adenosine monophosphate-activated serine/threonine protein kinase (AMPK) pathway in the pathogenesis of diabetic nephropathy (DN). Resveratrol, an agent that activates AMPK, may have the potential to protect against the development of DN. This study was designed to investigate the therapeutic effects of resveratrol on renal hypertrophy in early-stage diabetes and the underlying mechanisms.. Molecular and structural changes involved in the pathogenesis of DN were tested in a rat model of early-stage diabetes. Renal mesangial cells (RMCs) were cultured in media containing different concentrations of glucose with or without resveratrol. Cellular DNA synthesis was assayed by measuring (3)H-thymidine incorporation. The phosphorylation status of AMPK, eukaryotic translation initiation factor 4E binding protein 1 (4E-BP1), and phospho- ribosomal protein S6 (S6) was analyzed by Western blot.. Resveratrol reduced plasma creatinine and urinary albumin excretion and attenuated renal hypertrophy without affecting blood glucose levels. Moreover, resveratrol activated AMPK and inhibited phosphorylation of 4E-BP1 and S6 in diabetic rat kidneys. In vitro, resveratrol blocked high glucose-induced dephosphorylation of AMPK and phosphorylation of 4E-BP1 and S6 and strongly inhibited both the DNA synthesis and proliferation of RMCs.. These findings suggest the possibility that resveratrol exerts antiproliferative, antihypertrophic effects by activating AMPK and reducing 4E-BP1 and S6 phosphorylation, thus suppressing the development and progression of DN. Topics: AMP-Activated Protein Kinase Kinases; Animals; Diabetic Nephropathies; Hypertrophy; Kidney; Male; Phosphorylation; Protein Kinases; Rats; Rats, Sprague-Dawley; Resveratrol; Stilbenes | 2010 |
Inhibitory effect of resveratrol on angiotensin II-induced cardiomyocyte hypertrophy.
Resveratrol is proposed to account in part for the protective effect of red wine on the cardiovascular system. Angiotensin II (Ang II) is a potent hypertrophic stimulus in cardiomyocytes. In this study, we determined the effect of resveratrol on Ang II-induced cardiomyocyte hypertrophy. Cultured neonatal rat cardiomyocytes were stimulated with Ang II, and [3H]leucine incorporation and beta-myosin heavy chain (beta-MyHC) promoter activity were examined. Intracellular reactive oxygen species (ROS) were measured by a redox-sensitive fluorescent dye, 2' 7'-dichlorofluorescin diacetate, and the extracellular signal-regulated kinase (ERK) phosphorylation was examined by Western blotting. Resveratrol inhibited Ang II-increased intracellular ROS levels. Furthermore, resveratrol, as well as the antioxidant N-acetyl-cysteine, decreased Ang II- or H2O2-increased protein synthesis, beta-MyHC promoter activity, and ERK phosphorylation. In summary, we demonstrate for the first time that resveratrol inhibits Ang II-induced cardiomyocyte hypertrophy via attenuation of ROS generation. Topics: Acetylcysteine; Angiotensin II; Animals; Animals, Newborn; Antioxidants; Cells, Cultured; Hypertrophy; Leucine; Mitogen-Activated Protein Kinases; Muscle, Smooth, Vascular; Myocytes, Cardiac; Myosin Heavy Chains; Phosphorylation; Promoter Regions, Genetic; Rats; Rats, Sprague-Dawley; Reactive Oxygen Species; Resveratrol; Stilbenes; Transfection; Ventricular Myosins | 2004 |
Resveratrol suppresses angiotensin II-induced Akt/protein kinase B and p70 S6 kinase phosphorylation and subsequent hypertrophy in rat aortic smooth muscle cells.
Resveratrol (RV), a polyphenolic substance found in grape skin, is proposed to account in part for the protective effect of red wine in the cardiovascular system. Angiotensin II (Ang II)-induced hypertrophy of vascular smooth muscle cells (VSMCs) is a pivotal step in the development of cardiovascular disease. The aims of this study were to test the hypothesis that RV may alter Ang II-mediated hypertrophic VSMC growth and to identify the putative underlying signaling pathways. We show that RV indeed potently inhibits Ang II-induced [(3)H]leucine incorporation in a concentration-dependent manner (50 microM RV, 71% inhibition). Western blot analysis reveals that phosphorylation of Akt/protein kinase B (PKB) and to a lesser extent the mitogen-activated protein kinase extracellular signal-regulated kinase (ERK) 1/2, both essentially involved in Ang II-mediated hypertrophy, is dose dependently reduced by RV. Consistent with these results, we show that RV attenuates phosphorylation of the p70 ribosomal protein S6 kinase (p70(S6K)), a kinase downstream of the ERK 1/2 as well as the Akt pathway, that is implicated in Ang II-induced protein synthesis. Upstream of Akt/PKB RV seems to mediate its antihypertrophic effect by inhibiting phosphorylation of the phosphatidylinositol 3-kinase (PI(3)K) rather than by activating phosphatases. In summary, we demonstrate for the first time that RV inhibits Ang II-induced VSMC hypertrophy, possibly by interfering mainly with the PI(3)K/Akt and p70(S6K) but also with the ERK 1/2 signaling pathway. Thus, this study delivers important new insight in the molecular pathways that may contribute to the proposed beneficial effects of RV in cardiovascular disease. Topics: Angiotensin II; Animals; Aorta; Drug Interactions; Enzyme Activation; Hypertrophy; Male; Mitogen-Activated Protein Kinases; Muscle, Smooth, Vascular; Phosphorylation; Protein Serine-Threonine Kinases; Proto-Oncogene Proteins; Proto-Oncogene Proteins c-akt; Rats; Rats, Sprague-Dawley; Resveratrol; Ribosomal Protein S6 Kinases; Stilbenes | 2002 |
Dimethystilbestrol is not antiestrogenic for rat sexual behavior or gonadotropin secretion.
Topics: Animals; Dose-Response Relationship, Drug; Estradiol; Female; Gonadotropins; Hypertrophy; Male; Ovary; Posture; Progesterone; Rats; Sexual Behavior, Animal; Stilbenes; Uterus | 1978 |
[Cytofunctional picture of the anterior hypophysis in stillbene treatment & after prostatectomy in adenomatous hypertrophy of the prostate].
Topics: Fistula; Humans; Hypertrophy; Male; Neck; Pituitary Gland; Pituitary Gland, Anterior; Prostatectomy; Prostatic Hyperplasia; Stilbenes | 1958 |
[Cysto-sphincterometric research in prostate patients before and after treatment with stilbenes].
Topics: Humans; Hypertrophy; Male; Prostatic Hyperplasia; Research; Stilbenes; Urinary Bladder; Urinary Tract Physiological Phenomena | 1955 |