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Li J, Cheng Y, Li R, Wu X, Zheng C, Shiu PHT, Chan JCK, Rangsinth P, Liu C, Leung SWS, Lee SMY, Zhang C, Fu C, Zhang J, Cheung TMY, Leung GPH. Protective Effects of Amauroderma rugosum on Doxorubicin-Induced Cardiotoxicity through Suppressing Oxidative Stress, Mitochondrial Dysfunction, Apoptosis, and Activating Akt/mTOR and Nrf2/HO-1 Signaling Pathways. Oxid Med Cell Longev 2022; 2022:9266178. [PMID: 35693699 PMCID: PMC9177334 DOI: 10.1155/2022/9266178] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/12/2022] [Accepted: 05/14/2022] [Indexed: 12/15/2022]
Abstract
Clinical outcomes for doxorubicin (Dox) are limited by its cardiotoxicity but a combination of Dox and agents with cardioprotective activities is an effective strategy to improve its therapeutic outcome. Natural products provide abundant resources to search for novel cardioprotective agents. Ganoderma lucidum (GL) is the most well-known edible mushroom within the Ganodermataceae family. It is commonly used in traditional Chinese medicine or as a healthcare product. Amauroderma rugosum (AR) is another genus of mushroom from the Ganodermataceae family, but its pharmacological activity and medicinal value have rarely been reported. In the present study, the cardioprotective effects of the AR water extract against Dox-induced cardiotoxicity were studied in vitro and in vivo. Results showed that both the AR and GL extracts could potentiate the anticancer effect of Dox. The AR extract significantly decreased the oxidative stress, mitochondrial dysfunction, and apoptosis seen in Dox-treated H9c2 rat cardiomyocytes. However, knockdown of Nrf2 by siRNA abolished the protective effects of AR in these cells. In addition, Dox upregulated the expression of proapoptotic proteins and downregulated the Akt/mTOR and Nrf2/HO-1 signaling pathways, and these effects could be reversed by the AR extract. Consistently, the AR extract significantly prolonged survival time, reversed weight loss, and reduced cardiac dysfunction in Dox-treated mice. In addition, oxidative stress and apoptosis were suppressed, while Nrf2 and HO-1 expressions were elevated in the heart tissues of Dox-treated mice after treatment with the AR extract. However, the GL extract had less cardioprotective effect against Dox in both the cell and animal models. In conclusion, the AR water extract demonstrated a remarkable cardioprotective effect against Dox-induced cardiotoxicity. One of the possible mechanisms for this effect was the upregulation of the mTOR/Akt and Nrf2/HO-1-dependent pathways, which may reduce oxidative stress, mitochondrial dysfunction, and cardiomyocyte apoptosis. These findings suggested that AR may be beneficial for the heart, especially in patients receiving Dox-based chemotherapy.
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Affiliation(s)
- Jingjing Li
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
- Department of Rehabilitation Sciences, Faculty of Health and Social Sciences, Hong Kong Polytechnic University, Hong Kong SAR, China
| | - Yanfen Cheng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Renkai Li
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Xiaoping Wu
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Chengwen Zheng
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Polly Ho-Ting Shiu
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Jacqueline Cho-Ki Chan
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Panthakarn Rangsinth
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Conghui Liu
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Susan Wai-Sum Leung
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Simon Ming-Yuen Lee
- State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences, University of Macau, Macao SAR, China
| | - Chen Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Chaomei Fu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jinming Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | | | - George Pak-Heng Leung
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
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Cai Y, Zhang Y, Chen H, Sun XH, Zhang P, Zhang L, Liao MY, Zhang F, Xia ZY, Man RYK, Feinberg MW, Leung SWS. MicroRNA-17-3p suppresses NF-κB-mediated endothelial inflammation by targeting NIK and IKKβ binding protein. Acta Pharmacol Sin 2021; 42:2046-2057. [PMID: 33623121 PMCID: PMC8633290 DOI: 10.1038/s41401-021-00611-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 01/03/2021] [Indexed: 01/31/2023] Open
Abstract
Nuclear factor kappa B (NF-κB) activation contributes to many vascular inflammatory diseases. The present study tested the hypothesis that microRNA-17-3p (miR-17-3p) suppresses the pro-inflammatory responses via NF-κB signaling in vascular endothelium. Human umbilical vein endothelial cells (HUVECs), transfected with or without miR-17-3p agomir/antagomir, were exposed to lipopolysaccharide (LPS), and the inflammatory responses were determined. The cellular target of miR-17-3p was examined with dual-luciferase reporter assay. Mice were treated with miR-17-3p agomir and the degree of LPS-induced inflammation was determined. In HUVECs, LPS caused upregulation of miR-17-3p. Overexpression of miR-17-3p in HUVECs inhibited NIK and IKKβ binding protein (NIBP) protein expression and suppressed LPS-induced phosphorylation of inhibitor of kappa Bα (IκBα) and NF-κB-p65. The reduced NF-κB activity was paralleled by decreased protein levels of NF-κB-target gene products including pro-inflammatory cytokine [interleukin 6], chemokines [interleukin 8 and monocyte chemoattractant protein-1] and adhesion molecules [vascular cell adhesion molecule-1, intercellular adhesion molecule-1 and E-selectin]. Immunostaining revealed that overexpression of miR-17-3p reduced monocyte adhesion to LPS-stimulated endothelial cells. Inhibition of miR-17-3p with antagomir has the opposite effect on LPS-induced inflammatory responses in HUVECs. The anti-inflammatory effect of miR-17-3p was mimicked by NIBP knockdown. In mice treated with LPS, miR-17-3p expression was significantly increased. Systemic administration of miR-17-3p for 3 days suppressed LPS-induced NF-κB activation and monocyte adhesion to endothelium in lung tissues of the mice. In conclusion, miR-17-3p inhibits LPS-induced NF-κB activation in HUVECs by targeting NIBP. The findings therefore suggest that miR-17-3p is a potential therapeutic target/agent in the management of vascular inflammatory diseases.
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Affiliation(s)
- Yin Cai
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, China
- Department of Anaesthesiology, The University of Hong Kong, Hong Kong, China
| | - Yu Zhang
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China
| | - Hui Chen
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China
| | - Xing-Hui Sun
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Peng Zhang
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China
| | - Lu Zhang
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China
| | - Meng-Yang Liao
- Department of Cardiology, Institute of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Fang Zhang
- Department of Pharmacology, Medical College of Qingdao University, Qingdao, 266021, China
| | - Zheng-Yuan Xia
- Department of Anaesthesiology, The University of Hong Kong, Hong Kong, China
| | - Ricky Ying-Keung Man
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China
| | - Mark W Feinberg
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Susan Wai-Sum Leung
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China.
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Xu YC, Leung SWS, Leung GPH, Man RYK. Kaempferol enhances endothelium-dependent relaxation in the porcine coronary artery through activation of large-conductance Ca(2+) -activated K(+) channels. Br J Pharmacol 2015; 172:3003-14. [PMID: 25652142 DOI: 10.1111/bph.13108] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 01/21/2015] [Accepted: 01/27/2015] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND AND PURPOSE Kaempferol, a plant flavonoid present in normal human diet, can modulate vasomotor tone. The present study aimed to elucidate the signalling pathway through which this flavonoid enhanced relaxation of vascular smooth muscle. EXPERIMENTAL APPROACH The effect of kaempferol on the relaxation of porcine coronary arteries to endothelium-dependent (bradykinin) and -independent (sodium nitroprusside) relaxing agents was studied in an in vitro organ chamber setup. The whole-cell patch-clamp technique was used to determine the effect of kaempferol on potassium channels in porcine coronary artery smooth muscle cells (PCASMCs). KEY RESULTS At a concentration without direct effect on vascular tone, kaempferol (3 × 10(-6) M) enhanced relaxations produced by bradykinin and sodium nitroprusside. The potentiation by kaempferol of the bradykinin-induced relaxation was not affected by N(ω)-nitro-L-arginine methyl ester, an inhibitor of NO synthase (10(-4) M) or TRAM-34 plus UCL 1684, inhibitors of intermediate- and small-conductance calcium-activated potassium channels, respectively (10(-6) M each), but was abolished by tetraethylammonium chloride, a non-selective inhibitor of calcium-activated potassium channels (10(-3) M), and iberiotoxin, a selective inhibitor of large-conductance calcium-activated potassium channel (KCa 1.1; 10(-7) M). Iberiotoxin also inhibited the potentiation by kaempferol of sodium nitroprusside-induced relaxations. Kaempferol stimulated an outward-rectifying current in PCASMCs, which was abolished by iberiotoxin. CONCLUSIONS AND IMPLICATIONS The present results suggest that, in smooth muscle cells of the porcine coronary artery, kaempferol enhanced relaxations caused by endothelium-derived and exogenous NO as well as those due to endothelium-dependent hyperpolarization. This vascular effect of kaempferol involved the activation of KCa 1.1 channels.
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Affiliation(s)
- Y C Xu
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - S W S Leung
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - G P H Leung
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - R Y K Man
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
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Chen Z, Zhang X, Ying L, Dou D, Li Y, Bai Y, Liu J, Liu L, Feng H, Yu X, Leung SWS, Vanhoutte PM, Gao Y. cIMP synthesized by sGC as a mediator of hypoxic contraction of coronary arteries. Am J Physiol Heart Circ Physiol 2014; 307:H328-36. [PMID: 24906916 DOI: 10.1152/ajpheart.00132.2014] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
cGMP is considered the only mediator synthesized by soluble guanylyl cyclase (sGC) in response to nitric oxide (NO). However, purified sGC can synthesize several other cyclic nucleotides, including inosine 3',5'-cyclic monophosphate (cIMP). The present study was designed to determine the role of cIMP in hypoxic contractions of isolated porcine coronary arteries. Vascular responses were examined by measuring isometric tension. Cyclic nucleotides were assayed by HPLC tandem mass spectroscopy. Rho kinase (ROCK) activity was determined by measuring the phosphorylation of myosin phosphatase target subunit 1 using Western blot analysis and an ELISA kit. The level of cIMP, but not that of cGMP, was elevated by hypoxia in arteries with, but not in those without, endothelium [except if treated with diethylenetriamine (DETA) NONOate]; the increases in cIMP were inhibited by the sGC inhibitor 1H-[1,2,4]oxadiazolo[4,3,-a]quinoxalin-1-one (ODQ). Hypoxia (Po2: 25-30 mmHg) augmented contractions of arteries with and without endothelium if treated with DETA NONOate; these hypoxic contractions were blocked by ODQ. In arteries without endothelium, hypoxic augmentation of contraction was also obtained with exogenous cIMP. In arteries with endothelium, hypoxic augmentation of contraction was further enhanced by inosine 5'-triphosphate, the precursor for cIMP. The augmentation of contraction caused by hypoxia or cIMP was accompanied by increased phosphorylation of myosin phosphatase target subunit 1 at Thr(853), which was prevented by the ROCK inhibitor Y-27632. ROCK activity in the supernatant of isolated arteries was stimulated by cIMP in a concentration-dependent fashion. These results demonstrate that cIMP synthesized by sGC is the likely mediator of hypoxic augmentation of coronary vasoconstriction, in part by activating ROCK.
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Affiliation(s)
- Zhengju Chen
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing, China
| | - Xu Zhang
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing, China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Lei Ying
- Department of Pathophysiology, Wenzhou Medical University, Wenzhou; Zhejiang, China
| | - Dou Dou
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing, China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Yanhui Li
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China; Institute of Cardiovascular Sciences, Peking University Health Science Center, Beijing, China
| | - Yun Bai
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing, China
| | - Juan Liu
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing, China
| | - Limei Liu
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing, China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Han Feng
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing, China
| | - Xiaoxing Yu
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing, China
| | - Susan Wai-Sum Leung
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Li Ka Shing Faculty of Medicine, Hong Kong, China; and
| | - Paul M Vanhoutte
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Li Ka Shing Faculty of Medicine, Hong Kong, China; and State Key Laboratory of Pharmaceutical Biotechnology, University of Hong Kong, Hong Kong, China
| | - Yuansheng Gao
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing, China; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China;
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Leung SWS, Zhu DY, Man RYK. Effects of the aqueous extract of Salvia Miltiorrhiza (danshen) and its magnesium tanshinoate B-enriched form on blood pressure. Phytother Res 2010; 24:769-74. [PMID: 19943333 DOI: 10.1002/ptr.3047] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Danshen is the dried root and rhizome of the Chinese medicinal plant Salvia miltiorrhiza Bunge (Labiatae), which has been used to treat hypertension and myocardial infarction. One of its water-soluble active components is magnesium tanshinoate B (MTB). The present study examined and compared the cardiovascular effects of the water-soluble extract of danshen (SME) and its MTB-enriched form (containing 70% of MTB (MTB70)). Anaesthetized rats were infused intravenously with saline or phenylephrine to achieve a normal or elevated blood pressure, respectively. Different doses of SME, MTB70 or vehicle were then injected intravenously and their effect on blood pressure was monitored. The results indicate that SME and MTB70 reduce blood pressure dose-dependently. Independently of the initial blood pressure, SME caused a smaller reduction in blood pressure than MTB70. In rats infused with phenylephrine, MTB70 caused greater decreases in blood pressure than in rats infused with saline, while the responses to SME did not differ between the two groups. From these findings, it appears that MTB is one of the major components responsible for the cardiovascular effects of danshen, and that the beneficial cardiovascular effect of the extract is more prominent under conditions of elevated blood pressure.
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Affiliation(s)
- S W S Leung
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, PR China.
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Xu YC, Leung SWS, Yeung DKY, Hu LH, Chen GH, Che CM, Man RYK. Structure-activity relationships of flavonoids for vascular relaxation in porcine coronary artery. Phytochemistry 2007; 68:1179-88. [PMID: 17395220 DOI: 10.1016/j.phytochem.2007.02.013] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2006] [Revised: 11/20/2006] [Accepted: 02/15/2007] [Indexed: 05/14/2023]
Abstract
Flavonoids are polyphenolic compounds that are widespread in the plant kingdom, and structure-activity relationships (SAR) for vascular relaxation effects were examined for 17 of them using porcine coronary arteries. Density functional theory was employed to calculate the chemical parameters of these compounds. The order of potency for vascular relaxation was as follows: flavones (apigenin and luteolin) >or= flavonols (kaempferol and quercetin)>isoflavones (genistein and daidzein)>flavanon(ol)es (naringenin)>chalcones (phloretin)>anthocyanidins (pelargonidin)>flavan(ol)es ((+)-catechin and (-)-epicatechin). SAR analysis revealed that for good relaxation activity, the 5-OH, 7-OH, 4'-OH, C2=C3 and C4=O functionalities were essential. Comparison of rutin with quercetin, genistin with genistein, and puerarin with daidzein demonstrated that the presence of a glycosylation group greatly reduced relaxation effect. Total energy and molecular volume were also predictive of their relaxation activities. Our findings indicated that the most effective relaxing agents are apigenin, luteolin, kaempferol and genistein. These flavonoids possess the key chemical structures demonstrated in our SAR analysis.
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Affiliation(s)
- Y C Xu
- Department of Pharmacology, Faculty of Medicine, The University of Hong Kong Pokfulam Road, Hong Kong SAR, PR China
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Xu YC, Yeung DKY, Man RYK, Leung SWS. Kaempferol enhances endothelium-independent and dependent relaxation in the porcine coronary artery. Mol Cell Biochem 2006; 287:61-7. [PMID: 16699727 DOI: 10.1007/s11010-005-9061-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2005] [Accepted: 10/18/2005] [Indexed: 11/24/2022]
Abstract
The vascular effects of kaempferol were investigated in isolated porcine coronary artery rings. U46619 (9,11-dideoxy-9alpha, 11alpha-methanoepoxy prostaglandin F2alpha, 30 nM) was used to contract porcine coronary arterial rings. Concentration relaxation curve of kaempferol (1 nM - 100 microM) was constructed and kaempferol demonstrated significant relaxation at high concentrations. At low concentration with no significant effect on relaxation, kaempferol (10 microM) enhanced relaxation produced by bradykinin, the calcium ionophore A23187, isoproterenol and sodium nitroprusside in endothelium-intact porcine coronary arteries. In endothelium-disrupt rings, kaempferol (10 microM) also enhanced the relaxation caused by isoproterenol, sodium nitroprusside, levcromakalim and nifedipine. On the other hand, antioxidant agents did not affect bradykinin-induced relaxation or the enhancement effect of kaempferol. In summary, a low concentration of kaempferol (10 microM), devoid of significant vascular effect, has the ability to enhance endothelium-dependent and endothelium-independent relaxations. This action of kaempferol is unrelated to its antioxidant property.
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Affiliation(s)
- Y C Xu
- Department of Pharmacology, Faculty of Medicine, The University of Hong Kong, Hong Kong, SAR, China
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