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Cai L, Chen Y, Xue H, Yang Y, Wang Y, Xu J, Zhu C, He L, Xiao Y. Effect and pharmacological mechanism of Salvia miltiorrhiza and its characteristic extracts on diabetic nephropathy. JOURNAL OF ETHNOPHARMACOLOGY 2024; 319:117354. [PMID: 38380573 DOI: 10.1016/j.jep.2023.117354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 09/08/2023] [Accepted: 10/23/2023] [Indexed: 02/22/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Diabetic nephropathy (DN) is a severe diabetic microvascular complication with an increasing prevalence rate and lack of effective treatment. Traditional Chinese medicine has been proven to have favorable efficacy on DN, especially Salvia miltiorrhiza Bunge (SM), one of the most critical and conventional herbs in the treatment. Over the past decades, studies have demonstrated that SM is a potential treatment for DN, and the exploration of the underlying mechanism has also received much attention. AIM OF THIS REVIEW This review aims to systematically study the efficacy and pharmacological mechanism of SM in the treatment of DN to understand its therapeutic potential more comprehensively. MATERIALS AND METHODS Relevant information was sourced from Google Scholar, PubMed, Web of Science, and CNKI databases. RESULTS Several clinical trials and systematic reviews have indicated that SM has definite benefits on the kidneys of diabetic patients. And many laboratory studies have further revealed that SM and its characteristic extracts, mainly including salvianolic acids and tanshinones, can exhibit pharmacological activity against DN by the regulation of metabolism, renal hemodynamic, oxidative stress, inflammation, fibrosis, autophagy, et cetera, and several involved signaling pathways, thereby preventing various renal cells from abnormal changes in DN, including endothelial cells, podocytes, epithelial cells, and mesangial cells. CONCLUSION As a potential drug for the treatment of DN, SM has multi-component, multi-target, and multi-pathway pharmacological effects. This work will not only verify the satisfactory curative effect of SM in the treatment of DN but also provide helpful insights for the development of new anti-DN drugs and the application of traditional Chinese medicine.
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Affiliation(s)
- Luqi Cai
- The First Clinical Medical School, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Yu Chen
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Huizhong Xue
- The First Clinical Medical School, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Yimeng Yang
- The First Clinical Medical School, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Yuqi Wang
- The First Clinical Medical School, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Junhe Xu
- The First Clinical Medical School, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Chunyan Zhu
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Long He
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053, China.
| | - Yonghua Xiao
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China.
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Zhu N, Duan H, Feng Y, Xu W, Shen J, Wang K, Liu J. Magnesium lithospermate B ameliorates diabetic nephropathy by suppressing the uremic toxin formation mediated by gut microbiota. Eur J Pharmacol 2023:175812. [PMID: 37245856 DOI: 10.1016/j.ejphar.2023.175812] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 05/08/2023] [Accepted: 05/25/2023] [Indexed: 05/30/2023]
Abstract
Diabetic nephropathy (DN) is a major cause of renal failure and urgently necessitates new therapeutic strategies. Magnesium lithospermate B (MLB) showed a good protective effect on kidney injure by oral administration, despite its extremely low bioavailability. The current study aimed to investigate its gut microbiota-targeted mechanism to explain the paradoxical properties of pharmacodynamics and pharmacokinetics. Here we show that MLB alleviated DN by recovering the dysfunction of gut microbiota and their associated metabolites in colon content, such as short-chain fatty acids and amino acids. Moreover, MLB significantly decreased uremic toxin levels in plasma, especially the p-cresyl sulfate. We further discovered that MLB could affect the metabolism of p-cresyl sulfate by suppressing the formation of its intestinal precursors, i.e. the microbiota-mediated conversion from 4-hydroxyphenylacetate to p-cresol. In addition, the inhibition effects of MLB were confirmed. MLB and its metabolite danshensu exhibited inhibitory effects on p-cresol formation mediated by three strains belonging to the genus Clostridium, Bifidobacterium, and Fusobacterium, respectively. Meanwhile, MLB decreased the levels of p-cresyl sulfate in plasma and p-cresol in feces caused by rectal administration of tyrosine in mice. To summarize, the results indicated that MLB ameliorated DN through modulating gut microbiota-associated p-cresyl sulfate metabolism. Together, this study provides new insights on the microbiota-targeted mechanism of MLB in intervening DN and a new strategy in lowering plasma uremic toxins by blocking the formation of their precursors in intestine.
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Affiliation(s)
- Nanlin Zhu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China
| | - Haonan Duan
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China
| | - Yingying Feng
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China
| | - Wenwei Xu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China
| | - Jianhua Shen
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China
| | - Kai Wang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China.
| | - Jia Liu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China; School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310058, PR China.
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Grewal AS, Thapa K, Kanojia N, Sharma N, Singh S. Natural Compounds as Source of Aldose Reductase (AR) Inhibitors for the Treatment of Diabetic Complications: A Mini Review. Curr Drug Metab 2021; 21:1091-1116. [PMID: 33069193 DOI: 10.2174/1389200221666201016124125] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 07/07/2020] [Accepted: 07/18/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Aldol reductase (AR) is the polyol pathway's main enzyme that portrays a crucial part in developing 'complications of diabetes' involving cataract, retinopathy, nephropathy, and neuropathy. These diabetic abnormalities are triggered tremendously via aggregation of sorbitol formation (catalyzed by AR) in the polyol pathway. Consequently, it represents an admirable therapeutic target and vast research was done for the discovery of novel molecules as potential AR inhibitors for diabetic complications. OBJECTIVE This review article has been planned to discuss an outline of diabetic complications, AR and its role in diabetic complications, natural compounds reported as AR inhibitors, and benefits of natural/plant derived AR inhibitors for the management of diabetic abnormalities. RESULTS The goal of AR inhibition remedy is to stabilize the increased flux of blood glucose and sorbitol via the 'polyol pathway' in the affected tissues. A variety of synthetic inhibitors of AR have been established such as tolrestat and sorbinil, but both of these face limitations including low permeability and health problems. Pharmaceutical industries and other scientists were also undertaking work to develop newer, active, and 'safe' AR inhibitors from natural sources. Therefore, several naturally found molecules were documented to possess a potent inhibitory action on AR activity. CONCLUSION Natural inhibitors of AR appeared as harmless pharmacological agents for controlling diabetic complications. The detailed literature throughout this article shows the significance of herbal extracts and phytochemicals as prospective useful AR inhibitors in treating diabetic complications.
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Affiliation(s)
- Ajmer Singh Grewal
- Chitkara School of Basic Sciences, Chitkara University, Himachal Pradesh, India
| | - Komal Thapa
- Chitkara School of Basic Sciences, Chitkara University, Himachal Pradesh, India
| | - Neha Kanojia
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Neelam Sharma
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Sukhbir Singh
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
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Magnesium lithospermate B improves pulmonary artery banding induced right ventricular dysfunction by alleviating inflammation via p38MAPK pathway. Pulm Pharmacol Ther 2020; 63:101935. [PMID: 32783991 DOI: 10.1016/j.pupt.2020.101935] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 06/02/2020] [Accepted: 08/05/2020] [Indexed: 11/21/2022]
Abstract
BACKGROUD Magnesium lithospermate B (MLB) is a major bioactive component of Slavia miltiorrhiza, which has been widely used in heart diseases on account of its anti-inflammatory, anti-oxidative, anti-proliferative and anti-fibrotic properties. Substance P(SP) is a small molecule neuropeptide, which was secreted much more during heart failure, and has an obvious function of immune enhancement and inflammation induction. This study aimed to investigate the protective effects of MLB on pulmonary artery banding (PAB) induced right ventricular (RV) dysfunction. METHODS The mouse model of PAB was established. The mice were intraperitoneal (IP) injection treated with MLB (10 mg kg-1·d-1) for 4 weeks and p38 mitogen-activated protein kinase (MAPK) activator was given at the same time. Echocardiography were performed on day 28. Then the hearts were harvested, and substance P (SP), inflammatory cytokines such as tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), interleukin-1β (IL-1β) and cardiac fibrosis were detected. The macrophages and fibroblasts were stimulated by SP separately, and then treated with MLB as well as p38MAPK activator. The inflammatory cytokines from macrophage, the proliferation and fibrosis of cardiac fibroblasts were measured. The expression of p38MAPK proteins were confirmed by immunoblotting. FINDINGS MLB preserved RV ejection fraction (EF), FS, RV/(LV + septum), HW/BW index and blunted RV inflammation as well as fibrosis. Phosphorylated-p38 (p-p38) MAPK was up-regulated, which was partially reversed by MLB treatment. However, p38MAPK activator abolished the effects of MLB on RV dysfunction, suggesting a key role of p38MPAK pathway in the effects of MLB reversing RV dysfunction. In external experiment, MLB reversed the increase of inflammatory cytokines from macrophage, the proliferation and fibrosis of cardiac fibroblasts which was simulated by SP. In accordance with in vivo study, p38MAPK activator abolished the effects of MLB on macrophage as well as fibroblasts. INTERPRETATION MLB improves PAB induced right ventricular remodeling by alleviating inflammation via p38MAPK pathway. Thus, MLB may offer the therapeutic potential for the patients of RV dysfunction.
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Network Pharmacology-Based Identification of the Mechanisms of Shen-Qi Compound Formula in Treating Diabetes Mellitus. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:5798764. [PMID: 32595730 PMCID: PMC7292981 DOI: 10.1155/2020/5798764] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 02/20/2020] [Accepted: 04/09/2020] [Indexed: 12/21/2022]
Abstract
Aim The purpose of this research is to identify the mechanisms of Shen-Qi compound formula (SQC), a traditional Chinese medicine (TCM), for treating diabetes mellitus (DM) using system pharmacology. Methods The active components and therapeutic targets were identified, and these targets were analyzed using gene ontology (GO) enrichment analysis, Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis, and protein-protein interaction (PPI) analysis. Finally, an integrated pathway was constructed to show the mechanisms of SQC. Results A total of 282 active components and 195 targets were identified through a database search. The component-target network was constructed, and the key components were screened out according to their degree. Through the GO, PPI, and KEGG analyses, the mechanism network of SQC treating DM was constructed. Conclusions This study shows that the mechanisms of SQC treating DM are related to various pathways and targets. This study provides a good foundation and basis for further in-depth verification and clinical application.
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Cheng JQ, Shi QP, Ding F, Kong LT, Yu ML, Wang C. Liver function monitoring: a prospective nested case-control study of Salvia miltiorrhiza polyphenol injection. Sci Rep 2020; 10:3538. [PMID: 32103121 PMCID: PMC7044424 DOI: 10.1038/s41598-020-60608-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 02/14/2020] [Indexed: 11/09/2022] Open
Abstract
Instructions for Salvia miltiorrhiza polyphenol injections indicate abnormal liver function as an occasional adverse reaction, but the incidence of this adverse drug reaction (ADR) has increased in recent years. We assessed S. miltiorrhiza polyphenol ADRs by performing a nested case-control study(NCCS) and meta-analysis. In the NCCS, 2633 patients receiving this treatment in the First Affiliated Hospital of Bengbu Medical College were enrolled. Logistic regression models found that in 58 (2.2%) patients experiencing abnormal liver function, the risk for liver dysfunction was associated with sulfa drug allergy (OR = 7.874, 95%CI (1.280, 48.447), P = 0.026), payment methods (OR = 0.106, 95%CI (0.012, 0.934), P = 0.043), duration of administration (OR = 0.922, 95%CI (0.862, 0.986), P = 0.017), cefathiamidine (OR = 0.441, 95%CI (0.216, 0.900), P = 0.025), human serum albumin (OR = 1.958, 95%CI (1.011, 3.789), P = 0.046), Dazhu Rhodiola injection (OR = 2.599, 95%CI (1.112, 6.070), P = 0.027), or reduced glutathione (OR = 0.394, 95%CI (0.188, 0.826), P = 0.014). Meta-analysis of reports on S. miltiorrhiza polyphenol ADRs in controlled trials and other observational studies included 676 patients, of which 17 (2.17%; 95%CI (0.0105, 0.0358)) presented with liver dysfunction; associated ADR risk factors included co-administration of other drugs. Our NCCS and meta-analysis had similar ADR incidence rates, which were higher than the rate in the drug instructions. This study provides guidance for assessing liver dysfunction risks associated with S. miltiorrhiza polyphenol injections.
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Affiliation(s)
- Jin-Quan Cheng
- Department of Pharmacy, the First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China.,School of Pharmacy, Bengbu Medical College, Bengbu, Anhui, China
| | - Qing-Ping Shi
- Department of Pharmacy, the First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China. .,School of Pharmacy, Bengbu Medical College, Bengbu, Anhui, China.
| | - Feng Ding
- Department of Pharmacy, the First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China
| | - Ling-Ti Kong
- Department of Pharmacy, the First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China.,School of Pharmacy, Bengbu Medical College, Bengbu, Anhui, China
| | - Mei-Ling Yu
- Department of Pharmacy, the First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China.,School of Pharmacy, Bengbu Medical College, Bengbu, Anhui, China
| | - Can Wang
- School of Pharmacy, Bengbu Medical College, Bengbu, Anhui, China
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Micucci M, Bolchi C, Budriesi R, Cevenini M, Maroni L, Capozza S, Chiarini A, Pallavicini M, Angeletti A. Antihypertensive phytocomplexes of proven efficacy and well-established use: Mode of action and individual characterization of the active constituents. PHYTOCHEMISTRY 2020; 170:112222. [PMID: 31810054 DOI: 10.1016/j.phytochem.2019.112222] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 11/23/2019] [Accepted: 11/24/2019] [Indexed: 06/10/2023]
Abstract
Hypertension has become the leading risk factor for worldwide cardiovascular diseases. Conventional pharmacological treatment, after both dietary and lifestyle changes, is generally proposed. In this review, we present the antihypertensive properties of phytocomplexes from thirteen plants, long ago widely employed in ethnomedicines and, in recent years, increasingly evaluated for their activity in vitro and in vivo, also in humans, in comparison with synthetic drugs acting on the same systems. Here, we focus on the demonstrated or proposed mechanisms of action of such phytocomplexes and of their constituents proven to exert cardiovascular effects. Almost seventy phytochemicals are described and scientifically sound pertinent literature, published up to now, is summarized. The review emphasizes the therapeutic potential of these natural substances in the treatment of the 'high normal blood pressure' or 'stage 1 hypertension', so-named according to the most recent European and U.S. guidelines, and as a supplementation in more advanced stages of hypertension, however needing further validation by clinical trial intensification.
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Affiliation(s)
- M Micucci
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum University of Bologna, Via Belmeloro, 6, 40126, Italy
| | - C Bolchi
- Department of Pharmaceutical Sciences, University of Milano, Via Mangiagalli 25, 20133, Milan, Italy
| | - R Budriesi
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum University of Bologna, Via Belmeloro, 6, 40126, Italy
| | - M Cevenini
- Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Via Massarenti 9, 40126, Bologna, Italy
| | - L Maroni
- Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Via Massarenti 9, 40126, Bologna, Italy
| | - S Capozza
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum University of Bologna, Via Belmeloro, 6, 40126, Italy
| | - A Chiarini
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum University of Bologna, Via Belmeloro, 6, 40126, Italy
| | - M Pallavicini
- Department of Pharmaceutical Sciences, University of Milano, Via Mangiagalli 25, 20133, Milan, Italy.
| | - A Angeletti
- Unit of Nephrology, Dialysis and Transplantation, Department of Experimental Diagnostic and Specialty Medicine, University of Bologna, S.Orsola Malpighi Hospital, Bologna Italy
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Liu YL, Zhou XY, Xuan LJ. Magnesium lithospermate B ameliorates microcirculation perfusion in rats by promoting vascular NO production via activating the PI3K/AKT pathway. Acta Pharmacol Sin 2019; 40:1010-1018. [PMID: 30760835 PMCID: PMC6786332 DOI: 10.1038/s41401-018-0203-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 12/04/2018] [Indexed: 11/09/2022] Open
Abstract
Microcirculation morphologically refers to the blood flow in vessels of less than 150 μm in diameter, including arterioles, capillaries and venules, which provides nutrients and removes metabolic byproducts within tissues. Microcirculation dysfunction is involved in the pathological progress of many diseases, such as obesity, hypertension, and insulin resistance. In this study we investigated the effects of magnesium lithospermate B (MLB), an active compound of the traditional Chinese medicine Slavia miltiorrhiza, on the microcirculation dysfunction in rats and the underlying molecular mechanisms. The effects of MLB on microcirculation were assessed in vivo by measuring the hindlimb blood perfusion in dextran-induced microcirculation dysfunction rats and mesentery blood flow in anesthetized rats. We demonstrated that administration of MLB restored the impaired rat hindlimb blood flow and promoted the mesenteric micoperfusion in vivo. We further revealed in these two animal models that MLB treatment significantly increased the production of total nitrite in vascular tissues (mesentery, aorta, and heart), which was confirmed in human microvascular endothelial cells (HMEC-1) treated with MLB in vitro. Moreover, we showed that MLB treatment significantly increased the phosphorylation of endothelium nitric oxide synthase (eNOS) via inducing AKT phosphorylation in vivo and in vitro. Co-administration of the eNOS inhibitor L-NAME (20 mg/kg) abolished the protective effects of MLB against dextran-induced microcirculation dysfunction in rats, whereas pretreatment with PI3K inhibitor LY294002 (10 μM) prevented eNOS activation in MLB-treated HMEC-1 cells. Our results suggest that MLB can restore the microcirculation dysfunction via activating eNOS, and in turn enhancing the vascular nitric oxide production, which is medicated by MLB-caused activation of the PI3K/AKT pathway.
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Affiliation(s)
- Ying-Luo Liu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, 555 Zuchongzhi Road, Shanghai, 201203, China
- School of Pharmacy, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Xiao-Yu Zhou
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, 555 Zuchongzhi Road, Shanghai, 201203, China
| | - Li-Jiang Xuan
- School of Pharmacy, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China.
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, 501 Haike Road, Shanghai, 201203, China.
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Magnesium lithospermate B protects the endothelium from inflammation-induced dysfunction through activation of Nrf2 pathway. Acta Pharmacol Sin 2019; 40:867-878. [PMID: 30617294 DOI: 10.1038/s41401-018-0189-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 10/18/2018] [Indexed: 12/22/2022] Open
Abstract
Magnesium lithospermate B (MLB) is an active component of Salvia miltiorrhiza Radix, a traditional Chinese herb used in treating cardiovascular diseases. In this study, we investigated the protective effects of MLB against inflammation-induced endothelial dysfunction in vitro and in vivo, and the underlying mechanisms. Endothelial dysfunction was induced in human dermal microvascular endothelial cells (HMEC-1) in vitro by lipopolysaccharide (LPS, 1 μg/mL). We showed that pretreatment with MLB (10-100 μM) dose-dependently inhibited LPS-induced upregulation of inflammatory cytokines ICAM1, VCAM1, and TNFα, which contributed to reduced leukocytes adhesion and attenuation of endothelial hyperpermeability in HMEC-1 cells. SD rats were injected with LPS (10 mg/kg, ip) to induce endothelial dysfunction in vivo. We showed that pretreatment with MLB (25-100 mg/kg, ip) dose-dependently restored LPS-impaired endothelial-dependent vasodilation in superior mesenteric artery (SMA), attenuated leukocyte adhesion in mesenteric venules and decreased vascular leakage in the lungs. We further elucidated the mechanisms underlying the protective effects of MLB, and revealed that MLB pretreatment inhibited NF-κB activation through inhibition of IκBα degradation and subsequent phosphorylation of NF-κB p65 in vitro and in vivo. In HMEC-1 cells, MLB pretreatment activated the nuclear factor erythroid-2-related factor 2 (Nrf2) pathway. Knockdown of Nrf2 with siRNA abolished the inhibitory effects of MLB on IκBα degradation and ICAM1 up-regulation, which were mimicked by PKC inhibition (Gö6983) or PI3K/Akt inhibition (LY294002). In summary, our results demonstrate that MLB inhibits NF-κB activation through PKC- and PI3K/Akt-mediated Nrf2 activation in HMEC-1 cells and protects against LPS-induced endothelial dysfunction in murine model of acute inflammation.
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Chen G, Chen X, Niu C, Huang X, An N, Sun J, Huang S, Ye W, Li S, Shen Y, Liang J, Cong W, Jin L. Baicalin alleviates hyperglycemia-induced endothelial impairment 1 via Nrf2. J Endocrinol 2018; 240:JOE-18-0457.R1. [PMID: 30400057 DOI: 10.1530/joe-18-0457] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 10/04/2018] [Indexed: 11/08/2022]
Abstract
Baicalin is the major component found in Scutellaria baicalensis root, a widely used herb in traditional Chinese medicine, which exhibits strong anti-inflammatory, anti-viral and anti-tumor activities. The present work was devoted to elucidate the molecular and cellular mechanisms underlying the protective effects of Baicalin against diabetes-induced oxidative damage, inflammation and endothelial dysfunction. Diabetic mice, induced by streptozotocin (STZ), were treated with intraperitoneal Baicalin injections. Human umbilical vein endothelial cells (HUVECs) were cultured either in normal glucose (NG, 5.5 mM) or high glucose (HG, 33 mM) medium in the presence or absence of Baicalin for 72 h. We observed an obvious inhibition of hyperglycemia-triggered oxidative damage and inflammation in HUVECs and diabetic aortal vasculature by Baicalin, along with restoration of hyperglycemia-impaired nuclear factor (erythroid-derived 2)-like 2 (Nrf2) pathway activity. However, the protective effects of Baicalin almost completely abolished in HUVECs transduced with shRNA against Nrf2, but not with nonsense shRNA. Mechanistic studies demonstrated that HG decreased Akt and GSK3B phosphorylation, restrained nuclear export of Fyn and nuclear localization of Nrf2, blunted Nrf2 downstream target genes, and subsequently induced oxidative stress in HUVECs. However, those destructive cascade, were well prevented by Baicalin in HUVECs. Furthermore, LY294002 and ML385 (inhibitor of PI3K and Nrf2) attenuated Baicalin mediated Nrf2 activation and the ability of facilitates angiogenesis in vivo and ex vivo. Taken together, the endothelial protective effect of Baicalin under hyperglycemia condition could be partly attributed to its role in downregulating reactive oxygen species (ROS) and inflammation via the Akt/GSK3B/Fyn-mediated Nrf2 activation.
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Affiliation(s)
- Gen Chen
- G Chen, School of Pharmacy, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, 325000, P.R. China, Wenzhou, China
| | - Xiangjuan Chen
- X Chen, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325027, China, Wenzhou, China
| | - Chao Niu
- C Niu, Department of pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China, Wenzhou, China
| | - Xiaozhong Huang
- X Huang, Department of pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China, Wenzhou, China
| | - Ning An
- N An, School of Pharmacy, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, 325000, P.R. China, Wenzhou, China
| | - Jia Sun
- J Sun, School of Pharmacy, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, 325000, P.R. China, Wenzhou, China
| | - Shuai Huang
- S Huang, School of Pharmacy, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, 325000, P.R. China, Wenzhou, China
| | - Weijian Ye
- W Ye, Department of pharmacy, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China, Wenzhou, China
| | - Santie Li
- S Li, School of Pharmacy, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, 325000, P.R. China, Wenzhou, China
| | - Yingjie Shen
- Y Shen, School of Pharmacy, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, 325000, P.R. China, Wenzhou, China
| | - Jiaojiao Liang
- J Liang, School of Pharmacy, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, 325000, P.R. China, Wenzhou, China
| | - Weitao Cong
- W Cong, School of Pharmacy, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, 325000, P.R. China, Wenzhou, China
| | - Litai Jin
- L Jin, School of Pharmacy, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, 325000, P.R. China, Wenzhou, China
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Pavlou S, Lindsay J, Ingram R, Xu H, Chen M. Sustained high glucose exposure sensitizes macrophage responses to cytokine stimuli but reduces their phagocytic activity. BMC Immunol 2018; 19:24. [PMID: 29996768 PMCID: PMC6042333 DOI: 10.1186/s12865-018-0261-0] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 07/04/2018] [Indexed: 01/06/2023] Open
Abstract
Background Macrophages are tissue resident immune cells important for host defence and homeostasis. During diabetes, macrophages and other innate immune cells are known to have a pro-inflammatory phenotype, which is believed to contribute to the pathogenesis of various diabetic complications. However, diabetic patients are highly susceptible to bacterial infections, and often have impaired wound healing. The molecular mechanism underlying the paradox of macrophage function in diabetes is not fully understood. Recent evidence suggests that macrophage functions are governed by metabolic reprograming. Diabetes is a disorder that affects glucose metabolism; dysregulated macrophage function in diabetes may be related to alterations in their metabolic pathways. In this study, we seek to understand the effect of high glucose exposure on macrophage phenotype and functions. Results Bone marrow cells were cultured in short or long term high glucose and normal glucose medium; the number and phenotype of bone marrow derived macrophages were not affected by long-term high glucose treatment. Short-term high glucose increased the expression of IL-1β. Long-term high glucose increased the expression of IL-1β and TNFα but reduced the expression of IL-12p40 and nitric oxide production in M1 macrophage. The treatment also increased Arg-1 and IL-10 expression in M2 macrophages. Phagocytosis and bactericidal activity was reduced in long-term high glucose treated macrophages and peritoneal macrophages from diabetic mice. Long-term high glucose treatment reduced macrophage glycolytic capacity and glycolytic reserve without affecting mitochondrial ATP production and oxidative respiration. Conclusion Long-term high glucose sensitizes macrophages to cytokine stimulation and reduces phagocytosis and nitric oxide production, which may be related to impaired glycolytic capacity. Electronic supplementary material The online version of this article (10.1186/s12865-018-0261-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sofia Pavlou
- Centre for Experimental Medicine, School of Medicine, Dentistry & Biomedical Science, Queen's University Belfast, Belfast, UK
| | - Jaime Lindsay
- Centre for Experimental Medicine, School of Medicine, Dentistry & Biomedical Science, Queen's University Belfast, Belfast, UK
| | - Rebecca Ingram
- Centre for Experimental Medicine, School of Medicine, Dentistry & Biomedical Science, Queen's University Belfast, Belfast, UK
| | - Heping Xu
- Centre for Experimental Medicine, School of Medicine, Dentistry & Biomedical Science, Queen's University Belfast, Belfast, UK
| | - Mei Chen
- Centre for Experimental Medicine, School of Medicine, Dentistry & Biomedical Science, Queen's University Belfast, Belfast, UK.
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12
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Jiang X, Zhong L, Sun D, Rong L. Magnesium lithospermate B acts against dextran sodiumsulfate-induced ulcerative colitis by inhibiting activation of the NRLP3/ASC/Caspase-1 pathway. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2016; 41:72-77. [PMID: 26650800 DOI: 10.1016/j.etap.2015.10.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 10/23/2015] [Accepted: 10/26/2015] [Indexed: 06/05/2023]
Abstract
This study aimed to observe the therapeutic effects of magnesium lithospermate B on acute and chronic colitis induced by dextran sodiumsulfate (DSS) and the role of inflammasome complex (NOD-like receptor protein, NLRP; apoptosis-associated speck-like protein containing, ASC; caspase-1). Establishment of acute and chronic colitis models were by using 5% DSS oral administration in BALB/C male mice. Magnesium lithospermate B (240 mg/kg body weight) was given by subcutaneous injection. Samples were collected for biomarker assay, histological examination, immunohistochemical evaluation and western blot. There was obvious increase in TNF-α level and NLPR3, ASC, and caspase-1 expressions in acute and chronic colitis groups compared with the normal control. Significant decrease of the tumor necrosis factor-α level and the expressions of NLPR3, ASC, and caspase-1 were observed after treatment with magnesium lithospermate B. This study showed that magnesium lithospermate B could be used to treat acute and chronic colitis by inhibiting the activation of the NLRP3/ASC/Caspase-1 pathway.
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Affiliation(s)
- Xiaoyun Jiang
- Department of Gastroenterology, Huashan Hospital, Fudan University, Shanghai, China
| | - Liang Zhong
- Department of Gastroenterology, Huashan Hospital, Fudan University, Shanghai, China
| | - Dayu Sun
- Department of Gastroenterology, Huashan Hospital, Fudan University, Shanghai, China
| | - Lan Rong
- Department of Gastroenterology, Huashan Hospital, Fudan University, Shanghai, China.
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Yang ZB, Luo XJ, Ren KD, Peng JJ, Tan B, Liu B, Lou Z, Xiong XM, Zhang XJ, Ren X, Peng J. Beneficial effect of magnesium lithospermate B on cerebral ischemia-reperfusion injury in rats involves the regulation of miR-107/glutamate transporter 1 pathway. Eur J Pharmacol 2015; 766:91-8. [PMID: 26420356 DOI: 10.1016/j.ejphar.2015.09.042] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 09/23/2015] [Accepted: 09/24/2015] [Indexed: 11/19/2022]
Abstract
Recent studies uncovered that glutamate accumulation following cerebral ischemia-reperfusion (I/R) was related to the dysfunction of miR-107/glutamate transporter-1(GLT-1) pathway and magnesium lithospermate B (MLB) possesses the pharmacological activity of anti-excitotoxicity. This study aims to explore whether MLB is able to protect rat brain from excitatory neurotoxicity during I/R by modulating miR-107/GLT-1 pathway. Rats were subjected to 2h of cerebral ischemia following by 24h of reperfusion to establish an I/R injury model, which showed an increase in neurological deficit score, infarct volume and cellular apoptosis concomitant with glutamate accumulation, miR-107 elevation and GLT-1 down-regulation. Administration of MLB reduced I/R-induced cerebral injury accompanied by a reverse in glutamate accumulation, miR-107 and GLT-1 expression. Next, we examined the association of MLB with miR-107/GLT-1 pathway in a nerve cell hypoxia/reoxygenation (H/R) injury model. H/R treatment increased the nerve cells apoptosis concomitant with glutamate accumulation and miR-107 elevation, and suppressed GLT-1 expression, mimicking our in vivo findings. All these effects were reversed in the presence of MLB, confirming a strong correlation between MLB and miR-107/GLT-1 pathway. Based on these observations, we conclude that MLB is able to protect the rat brain from excitatory neurotoxicity during I/R through the regulation of miR-107/GLT-1 pathway.
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Affiliation(s)
- Zhong-Bao Yang
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China; Hunan Provincial Key Laboratory of Cardiovascular Research, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
| | - Xiu-Ju Luo
- Department of Laboratory Medicine, Xiangya School of Medicine, Central South University, Changsha 410013, China
| | - Kai-Di Ren
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
| | - Jing-Jie Peng
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China; Department of Laboratory Medicine, Xiangya School of Medicine, Central South University, Changsha 410013, China
| | - Bin Tan
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China; Department of Pharmacology, Xiangnan University, Chenzhou 423000, China
| | - Bin Liu
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
| | - Zheng Lou
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
| | - Xiao-Ming Xiong
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China; Hunan Provincial Key Laboratory of Cardiovascular Research, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
| | - Xiao-Jie Zhang
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China; Hunan Provincial Key Laboratory of Cardiovascular Research, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
| | - Xian Ren
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
| | - Jun Peng
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China; Hunan Provincial Key Laboratory of Cardiovascular Research, School of Pharmaceutical Sciences, Central South University, Changsha 410078, China.
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Jung YR, Lee EK, Kim DH, Park CH, Park MH, Jeong HO, Yokozawa T, Tanaka T, Im DS, Kim ND, Yu BP, Mo SH, Chung HY. Upregulation of Collagen Expression via PPARβ/δ Activation in Aged Skin by Magnesium Lithospermate B from Salvia miltiorrhiza. JOURNAL OF NATURAL PRODUCTS 2015; 78:2110-2115. [PMID: 26280594 DOI: 10.1021/acs.jnatprod.5b00348] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This study investigated the agonistic activity of magnesium lithospermate B (1), isolated from Salvia miltiorrhiza, on peroxisome proliferator-activated receptor (PPARβ/δ) and the expressions of collagen genes (COL1A1 and COL3A1) and transforming growth factor-β1 (TGF-β1) in models of skin aging. The action of compound 1 as a PPARβ/δ agonist was determined by reporter gene assay, immunostaining, and Western blotting. To determine the antiaging effects of compound 1 on skin, aged Sprague-Dawley rat skin and ultraviolet B (UVB)-irradiated human skin fibroblasts were used. The results show that 1 presented a marked enhancement of both nuclear protein levels and activity of PPARβ/δ in fibroblasts. In addition, 1 prevented downregulation of PPARβ/δ activity in aged rat skin and UVB-induced fibroblasts. Furthermore, 1 increased the expressions of COL1A1, COL3A1, and TGF-β1 in vivo and in a cell culture system. Therefore, the present study shows that compound 1 prevents collagen degradation in aged rat skin and UVB-exposed fibroblasts through PPARβ/δ activation. The therapeutic and cosmetic applications of compound 1 need further investigation.
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Affiliation(s)
- Yu Ri Jung
- Molecular Inflammation Research Center for Aging Intervention (MRCA), College of Pharmacy, Pusan National University , Busan 609-735, Republic of Korea
| | - Eun Kyeong Lee
- Molecular Inflammation Research Center for Aging Intervention (MRCA), College of Pharmacy, Pusan National University , Busan 609-735, Republic of Korea
| | - Dae Hyun Kim
- Molecular Inflammation Research Center for Aging Intervention (MRCA), College of Pharmacy, Pusan National University , Busan 609-735, Republic of Korea
| | - Chan Hum Park
- Molecular Inflammation Research Center for Aging Intervention (MRCA), College of Pharmacy, Pusan National University , Busan 609-735, Republic of Korea
- College of Korean Medicine, Daegu Haany University , Gyeongsan 712-715, Republic of Korea
| | - Min Hi Park
- Molecular Inflammation Research Center for Aging Intervention (MRCA), College of Pharmacy, Pusan National University , Busan 609-735, Republic of Korea
| | - Hyoung Oh Jeong
- Molecular Inflammation Research Center for Aging Intervention (MRCA), College of Pharmacy, Pusan National University , Busan 609-735, Republic of Korea
| | - Takako Yokozawa
- Graduate School of Science and Engineering for Research, University of Toyama , Toyama 930-8555, Japan
| | - Takashi Tanaka
- Faculty of Pharmaceutical Sciences, Nagasaki University , Nagasaki 852-8131, Japan
| | - Dong Soon Im
- Molecular Inflammation Research Center for Aging Intervention (MRCA), College of Pharmacy, Pusan National University , Busan 609-735, Republic of Korea
| | - Nam Deuk Kim
- Molecular Inflammation Research Center for Aging Intervention (MRCA), College of Pharmacy, Pusan National University , Busan 609-735, Republic of Korea
| | - Byung Pal Yu
- Department of Physiology, The University of Texas Health Science Center at San Antonio , San Antonio, Texas 78229-3900, United States
| | | | - Hae Young Chung
- Molecular Inflammation Research Center for Aging Intervention (MRCA), College of Pharmacy, Pusan National University , Busan 609-735, Republic of Korea
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A strategy for the identification of combinatorial bioactive compounds contributing to the holistic effect of herbal medicines. Sci Rep 2015. [PMID: 26198093 PMCID: PMC4510521 DOI: 10.1038/srep12361] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
It has been well claimed that herbal medicines (HMs) elicit effects via a multi-compounds and multi-targets synergistic mode. However, it lacks appropriate strategies to uncover the combinatory compounds that take effect together and contribute to a certain pharmacological effect of an herb as a whole, which represents a major bottleneck in providing sound evidence in supporting the clinic benefits of HMs. Here, we proposed a strategy to the identification of combinatory compounds contributing to the anti-inflammatory activity of Cardiotonic Pill (CP). The strategy proposed herein contains four core steps, including the identification of bioequivalent combinatorial compounds, chemical family classification-based combinatorial screen, interactive mode evaluation, and activity contribution index assay. Using this strategy, we have successfully identified six compounds in combination responsible for the anti-inflammatory effect of CP, whose anti-inflammatory activities were found comparable to that of the whole CP. Additionally, these six compounds take effect via an additive mode but little synergism. This study, together with our recent work in the identification of bioactive equivalent compounds combination, provides a widely applicable strategy to the identification of combinatory compounds responsible for a certain pharmacological activity of HMs.
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16
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Natural Nrf2 activators in diabetes. Clin Chim Acta 2015; 448:182-92. [PMID: 26165427 DOI: 10.1016/j.cca.2015.07.009] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 06/30/2015] [Accepted: 07/07/2015] [Indexed: 12/21/2022]
Abstract
Prediabetes and diabetes are rising worldwide. Control of blood glucose is crucial to prevent or delay diabetic complications that frequently result in increased morbidity and mortality. Most strategies include medical treatment and changes in lifestyle and diet. Some nutraceutical compounds have been recognized as adjuvants in diabetes control. Many of them can activate the nuclear factor (erythroid-derived 2)-like 2 (Nrf2), which has been recognized as a master regulator of the antioxidant response. Recent studies have described the role of Nrf2 in obesity, metabolic syndrome, nephropathy, retinopathy and neuropathy, where its activation prevents the development of diabetes and its complications. It has been demonstrated that natural compounds derived from plants, vegetables, fungi and micronutrients (such as curcumin, sulforaphane, resveratrol and vitamin D among others) can activate Nrf2 and, thus, promote antioxidant pathways to mitigate oxidative stress and hyperglycemic damage. The role of some natural Nrf2 activators and its effect in diabetes is discussed.
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Cao ZQ, Quan W, Hou SX, Guo C, Ma SB, Zhang W, Li X. The natural therapeutic magnesium lithospermate B potently provides neuroprotective effects on cerebral ischemia/reperfusion injury in rats. JOURNAL OF ETHNOPHARMACOLOGY 2015; 162:191-198. [PMID: 25560670 DOI: 10.1016/j.jep.2014.12.048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Revised: 12/08/2014] [Accepted: 12/23/2014] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Salvia miltiorrhiza, a perennial plant in the genus Salvia and popularly known as "Danshen", is highly valued for its roots in traditional Chinese medicines (TCMs). It has widely used for the treatment of cerebrovascular and cardiovascular diseases in China. Recently, the cerebral protection of magnesium lithospermate B (MLB), a working extract from Salvia miltiorrhiza, has received more attention. Here, we investigated the therapeutic effects of MLB on cerebral ischemia/reperfusion (CI/R) injury using the middle cerebral artery occlusion (MCAO) model in rats. MATERIALS AND METHODS Male Sprague-Dawley rats were subjected to CI/R using a thread to occlude the right middle cerebral artery. After 2h of cerebral ischemia, the middle cerebral artery was reperfused for 24 h. Rats were injected with different doses of MLB (15, 30 and 60 mg/kg). Infarct zones, neurological deficit scores, brain water content, glutamate levels and protein expressions were evaluated after 24h of reperfusion. RESULTS We found that MLB treatment of rats exposed to focal CI/R decreased neurological deficit scores, brain water content, glutamate levels and cerebral infarct zones. We also demonstrated that MLB can inhibit CI/R injury-induced activation of caspase-3, a marker of apoptosis. This protection by MLB against CI/R injury was accompanied by an upregulation of p-Akt in the ischemic hemisphere. Furthermore, the MLB-induced protection was prevented by treatment with a PI3K inhibitor (LY-294002). CONCLUSIONS The data in the present study suggest a potential protective role of MLB against CI/R injury in rats. The salient finding of the present study is that this protective effect of MLB is likely mediated through an Akt-dependent pathway.
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Affiliation(s)
- Zhi-qiang Cao
- Department of Urinary Urology, General Hospital of Shenyang Military Region, Shenyang 110840, China
| | - Wei Quan
- Department of Pharmacy, Xi'an Mental Health Center, Institute of Mental Health, Xi'an Medical University, Xi'an 710061, China
| | - Shuang-xing Hou
- Department of Neurology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Chao Guo
- Department of Pharmacy, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Shan-bo Ma
- Department of Pharmacy, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Wei Zhang
- Department of Medical Statistics, School of Preventive Medicine, Fourth Military Medical University, Xi'an 710032, China
| | - Xin Li
- Department of Urinary Urology, General Hospital of Shenyang Military Region, Shenyang 110840, China.
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18
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Das A, Gopalakrishnan B, Druhan LJ, Wang TY, De Pascali F, Rockenbauer A, Racoma I, Varadharaj S, Zweier JL, Cardounel AJ, Villamena FA. Reversal of SIN-1-induced eNOS dysfunction by the spin trap, DMPO, in bovine aortic endothelial cells via eNOS phosphorylation. Br J Pharmacol 2014; 171:2321-34. [PMID: 24405159 DOI: 10.1111/bph.12572] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 12/03/2013] [Accepted: 12/18/2013] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND AND PURPOSE Nitric oxide (NO) derived from eNOS is mostly responsible for the maintenance of vascular homeostasis and its decreased bioavailability is characteristic of reactive oxygen species (ROS)-induced endothelial dysfunction (ED). Because 5,5-dimethyl-1-pyrroline-N-oxide (DMPO), a commonly used spin trap, can control intracellular nitroso-redox balance by scavenging ROS and donating NO, it was employed as a cardioprotective agent against ED but the mechanism of its protection is still not clear. This study elucidated the mechanism of protection by DMPO against SIN-1-induced oxidative injury to bovine aortic endothelial cells (BAEC). EXPERIMENTAL APPROACH BAEC were treated with SIN-1, as a source of peroxynitrite anion (ONOO⁻), and then incubated with DMPO. Cytotoxicity following SIN-1 alone and cytoprotection by adding DMPO was assessed by MTT assay. Levels of ROS and NO generation from HEK293 cells transfected with wild-type and mutant eNOS cDNAs, tetrahydrobiopterin bioavailability, eNOS activity, eNOS and Akt kinase phosphorylation were measured. KEY RESULTS Post-treatment of cells with DMPO attenuated SIN-1-mediated cytotoxicity and ROS generation, restoration of NO levels via increased in eNOS activity and phospho-eNOS levels. Treatment with DMPO alone significantly increased NO levels and induced phosphorylation of eNOS Ser¹¹⁷⁹ via Akt kinase. Transfection studies with wild-type and mutant human eNOS confirmed the dual role of eNOS as a producer of superoxide anion (O₂⁻) with SIN-1 treatment, and a producer of NO in the presence of DMPO. CONCLUSION AND IMPLICATIONS Post-treatment with DMPO of oxidatively challenged cells reversed eNOS dysfunction and could have pharmacological implications in the treatment of cardiovascular diseases.
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Affiliation(s)
- Amlan Das
- Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University, Columbus, OH, USA
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Fang C, Ren X, Zhou H, Gong ZC, Shen L, Bai J, Yin JY, Qu J, Li XP, Zhou HH, Liu ZQ. Effects ofeNOSrs1799983 andACErs4646994 polymorphisms on the therapeutic efficacy of salvianolate injection in Chinese patients with coronary heart disease. Clin Exp Pharmacol Physiol 2014; 41:558-64. [PMID: 24827774 DOI: 10.1111/1440-1681.12257] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2013] [Revised: 04/18/2014] [Accepted: 05/02/2014] [Indexed: 01/03/2023]
Affiliation(s)
- Chao Fang
- Department of Clinical Pharmacology; Xiangya Hospital; Central South University; Changsha China
- Institute of Clinical Pharmacology; Central South University; Changsha China
- Hunan Key Laboratory of Pharmacogenetics; Central South University; Changsha China
| | - Xian Ren
- Shanghai Green Valley Pharmaceutical Co. Ltd; Shanghai China
| | - Huan Zhou
- Department of Cardiology; Xiangya Hospital; Central South University; Changsha China
| | - Zhi-Cheng Gong
- Department of Pharmacy; Xiangya Hospital; Central South University; Changsha China
| | - Li Shen
- Department of Cardiology; The Third Hospital of Changsha; Changsha China
| | - Jing Bai
- School of Basic Medical Sciences; Beijing University of Chinese Medicine; Beijing China
| | - Ji-Ye Yin
- Department of Clinical Pharmacology; Xiangya Hospital; Central South University; Changsha China
| | - Jian Qu
- Department of Clinical Pharmacology; Xiangya Hospital; Central South University; Changsha China
| | - Xiang-Ping Li
- Department of Clinical Pharmacology; Xiangya Hospital; Central South University; Changsha China
| | - Hong-Hao Zhou
- Department of Clinical Pharmacology; Xiangya Hospital; Central South University; Changsha China
| | - Zhao-Qian Liu
- Department of Clinical Pharmacology; Xiangya Hospital; Central South University; Changsha China
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Tian S, Ge X, Wu K, Yang H, Liu Y. Ramipril protects the endothelium from high glucose-induced dysfunction through CaMKKβ/AMPK and heme oxygenase-1 activation. J Pharmacol Exp Ther 2014; 350:5-13. [PMID: 24741076 DOI: 10.1124/jpet.114.212928] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
This study aims to investigate the effects of ramipril (RPL) on endothelial dysfunction associated with diabetes mellitus using cultured human aortic endothelial cells (HAECs) and a type 2 diabetic animal model. The effect of RPL on vasodilatory function in fat-fed, streptozotocin-treated rats was assessed. RPL treatment of 8 weeks alleviated insulin resistance and inhibited the decrease in endothelium-dependent vasodilation in diabetic rats. RPL treatment also reduced serum advanced glycation end products (AGE) concentration and rat aorta reactive oxygen species formation and increased aorta endothelium heme oxygenase-1 (HO-1) expression. Exposure of HAECs to high concentrations of glucose induced prolonged oxidative stress, apoptosis, and accumulation of AGEs. These effects were abolished by incubation of ramiprilat (RPT), the active metabolite of RPL. However, treatment of HAECs with STO-609, a CaMKKβ (Ca(2+)/calmodulin-dependent protein kinase kinase-β) inhibitor; compound C, an AMPK (AMP-activated protein kinase) inhibitor; and Zn(II)PPIX, a selective HO-1 inhibitor, blocked these beneficial effects of RPT. In addition, RPT increased nuclear factor erythroid 2-related factor-2 (Nrf-2) nuclear translocation and activation in a CaMKKβ/AMPK pathway-dependent manner, leading to increased expression of the Nrf-2-regulated antioxidant enzyme, HO-1. The inhibition of CaMKKβ or AMPK by pharmaceutical approach ablated RPT-induced HO-1 expression. Taken together, RPL ameliorates insulin resistance and endothelial dysfunction in diabetes via reducing oxidative stress. These effects are mediated by RPL activation of CaMKK-β, which in turn activates the AMPK-Nrf-2-HO-1 pathway for enhanced endothelial function.
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Affiliation(s)
- Shiliu Tian
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sport, Shanghai, China (S.T., Y.L.); Department of Biochemistry, University of California, Riverside, California (S.T.); Shandong Sport University, Shandong, China (X.G.); Center for Animal Experiment/ABSL-3 Laboratory, Wuhan University, Hubei, China (K.W.); Center for Medical Research, Wuhan University, Hubei, China (K.W.); and Department of Basic Theories, Hubei University of Traditional Chinese Medicine, Hubei, China (H.Y.)
| | - Xinfa Ge
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sport, Shanghai, China (S.T., Y.L.); Department of Biochemistry, University of California, Riverside, California (S.T.); Shandong Sport University, Shandong, China (X.G.); Center for Animal Experiment/ABSL-3 Laboratory, Wuhan University, Hubei, China (K.W.); Center for Medical Research, Wuhan University, Hubei, China (K.W.); and Department of Basic Theories, Hubei University of Traditional Chinese Medicine, Hubei, China (H.Y.)
| | - Ke Wu
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sport, Shanghai, China (S.T., Y.L.); Department of Biochemistry, University of California, Riverside, California (S.T.); Shandong Sport University, Shandong, China (X.G.); Center for Animal Experiment/ABSL-3 Laboratory, Wuhan University, Hubei, China (K.W.); Center for Medical Research, Wuhan University, Hubei, China (K.W.); and Department of Basic Theories, Hubei University of Traditional Chinese Medicine, Hubei, China (H.Y.)
| | - Huabing Yang
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sport, Shanghai, China (S.T., Y.L.); Department of Biochemistry, University of California, Riverside, California (S.T.); Shandong Sport University, Shandong, China (X.G.); Center for Animal Experiment/ABSL-3 Laboratory, Wuhan University, Hubei, China (K.W.); Center for Medical Research, Wuhan University, Hubei, China (K.W.); and Department of Basic Theories, Hubei University of Traditional Chinese Medicine, Hubei, China (H.Y.)
| | - Yu Liu
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sport, Shanghai, China (S.T., Y.L.); Department of Biochemistry, University of California, Riverside, California (S.T.); Shandong Sport University, Shandong, China (X.G.); Center for Animal Experiment/ABSL-3 Laboratory, Wuhan University, Hubei, China (K.W.); Center for Medical Research, Wuhan University, Hubei, China (K.W.); and Department of Basic Theories, Hubei University of Traditional Chinese Medicine, Hubei, China (H.Y.)
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Magnesium Lithospermate B Reduces Inflammatory Response in a Mouse Model of Hepatic Ischemia–Reperfusion Injury. Cell Biochem Biophys 2014; 69:347-55. [DOI: 10.1007/s12013-013-9806-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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22
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Jiang X, Jiang Y, Sun D, Rong L. Protective effect of magnesium lithospermate B against dextran sodiumsulfate induced ulcerative colitis in mice. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2013; 36:97-102. [PMID: 23603461 DOI: 10.1016/j.etap.2013.03.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 02/26/2013] [Accepted: 03/08/2013] [Indexed: 06/02/2023]
Abstract
Anti-platelet drugs have been used to treat inflammatory bowel disease. In this study, we observed the therapeutic effects of magnesium lithospermate B, a main component of salvianolate, on colitis induced by dextran sodiumsulfate (DSS). Colitis was induced by 5% DSS oral administration in BALB/C male mice. Magnesium lithospermate B (60-240mg/kg) was given by subcutaneous injection for 2 weeks. Then, mice were sacrificed; serum and colon tissues were collected for biomarker assay, histological examination, immunohistochemical study and real-time quantitative polymerase chain reaction. DSS induced gross bleeding, inflammation, crypt damage and mucosal damage in colon. Treatment with magnesium lithospermate B could reduce colon inflammation induced by DSS. Magnesium lithospermate B could reverse the high CD40/CD40L expression and hypercoagulable state induced by DSS in colon. This study showed that magnesium lithospermate B could be used to treat colitis. The protective effects of magnesium lithospermate B may be due to its effects on CD40/CD40L expression and blood clotting status.
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Affiliation(s)
- Xiaoyun Jiang
- Department of Gastroenterology, Huashan Hospital, Fudan University, China
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Wang J, Xiong X, Feng B. Cardiovascular effects of salvianolic Acid B. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2013; 2013:247948. [PMID: 23840250 PMCID: PMC3691933 DOI: 10.1155/2013/247948] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 05/11/2013] [Indexed: 12/16/2022]
Abstract
Salvianolic acid B (SAB, Sal B) is the representative component of phenolic acids derived from the dried root and rhizome of Salvia miltiorrhiza Bge (Labiatae) which has been used widely and successfully in Asian countries for clinical therapy of various vascular disturbance-related diseases for hundreds of years. However, its exact cardioprotective components and the underlying mechanism for therapeutic basis are still poorly understood. This paper discussed and elucidated the underlying biological mechanisms and pharmacology of Sal B and their potential cardioprotective effects.
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Affiliation(s)
- Jie Wang
- Department of Cardiology, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Xicheng District, Beijing 100053, China
| | - Xingjiang Xiong
- Department of Cardiology, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Xicheng District, Beijing 100053, China
| | - Bo Feng
- Department of Cardiology, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Xicheng District, Beijing 100053, China
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Xiong M, Wang J, Yang C, Lai H. The cochlea magnesium content is negatively correlated with hearing loss induced by impulse noise. Am J Otolaryngol 2013; 34:209-15. [PMID: 23332299 DOI: 10.1016/j.amjoto.2012.11.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 11/23/2012] [Accepted: 11/26/2012] [Indexed: 01/10/2023]
Abstract
OBJECTIVE Magnesium is proved to attenuate acoustic trauma, and reactive oxygen species (ROS) formation is a critical role that involves hearing loss induced by impulse noise. We aimed to investigate the relationship between the cochlea magnesium content, ROS formation and hearing loss induced by impulse noise. METHODS Ninety pigmented guinea pigs were exposed to impulse noise. Auditory thresholds were assessed by sound-evoked auditory brainstem response (ABR) 24h before and 72h after exposure to impulse noise. 4-Hydroxynonenal(HNE) used as a marker of ROS was determined immunohistochemically. The cochlea magnesium content was examined with the method of energy dispersive x-ray analysis, and the cochlea was also detected with scanning electron microscope. The relationship between the cochlea magnesium content, ROS formation and hearing loss was analyzed. RESULTS There was loss of outer hair cell cilia accompanying with significant auditory threshold shift after impulse noise exposure. ROS was positive in the organ of Corti of all animals. The cochlea magnesium content was negatively correlated with ROS formation and hearing loss. CONCLUSIONS Inhibiting ROS formation is one of the mechanisms for magnesium to reduce acoustic trauma, and difference in cochlea magnesium contents is one of the factors that induce varying degrees of cochlear damage among each individual after acoustic trauma.
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Pharmacological approaches to the treatment of oxidative stress-induced cardiovascular dysfunctions. Future Med Chem 2013; 5:465-78. [DOI: 10.4155/fmc.13.15] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Cardiovascular diseases are a growing major global health problem. Our understanding of the mechanisms of pathophysiology of cardiovascular diseases has been gaining significant advances and a wealth of knowledge implicates oxidative stress as a key causative agent. However, to date, most efforts to treat heart failure using conventional antioxidant therapies have been less than encouraging. With increasing incidences of cardiovascular disease in young as well as in aging populations, and the problem of long-term diminishing efficacy of conventional therapeutics, the need for new treatments has never been greater. In this review, a variety of therapeutic targets and compounds applied to treat cardiovascular diseases via inhibition of oxidative stress are presented.
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Barbagallo I, Galvano F, Frigiola A, Cappello F, Riccioni G, Murabito P, D'Orazio N, Torella M, Gazzolo D, Li Volti G. Potential therapeutic effects of natural heme oxygenase-1 inducers in cardiovascular diseases. Antioxid Redox Signal 2013; 18:507-21. [PMID: 23025298 DOI: 10.1089/ars.2011.4360] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
SIGNIFICANCE Many physiological effects of natural antioxidants, their extracts or their major active components, have been reported in recent decades. Most of these compounds are characterized by a phenolic structure, similar to that of α-tocopherol, and present antioxidant properties that have been demonstrated both in vitro and in vivo. Polyphenols may increase the capacity of endogenous antioxidant defenses and modulate the cellular redox state. Such effects may have wide-ranging consequences for cellular growth and differentiation. CRITICAL ISSUES The majority of in vitro and in vivo studies conducted so far have attributed the protective effect of bioactive polyphenols to their chemical reactivity toward free radicals and their capacity to prevent the oxidation of important intracellular components. One possible protective molecular mechanism of polyphenols is nuclear factor erythroid 2-related factor (Nrf2) activation, which in turn regulates a number of detoxification enzymes. RECENT ADVANCES Among the latter, the heme oxygenase-1 (HO-1) pathway is likely to contribute to the established and powerful antioxidant/anti-inflammatory properties of polyphenols. In this context, it is interesting to note that induction of HO-1 expression by means of natural compounds contributes to prevention of cardiovascular diseases in various experimental models. FUTURE DIRECTIONS The focus of this review is on the role of natural HO-1 inducers as a potential therapeutic strategy to protect the cardiovascular system against various stressors in several pathological conditions.
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Potential implication of the chemical properties and bioactivity of nitrone spin traps for therapeutics. Future Med Chem 2012; 4:1171-207. [PMID: 22709256 DOI: 10.4155/fmc.12.74] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Nitrone therapeutics has been employed in the treatment of oxidative stress-related diseases such as neurodegeneration, cardiovascular disease and cancer. The nitrone-based compound NXY-059, which is the first drug to reach clinical trials for the treatment of acute ischemic stroke, has provided promise for the development of more robust pharmacological agents. However, the specific mechanism of nitrone bioactivity remains unclear. In this review, we present a variety of nitrone chemistry and biological activity that could be implicated for the nitrone's pharmacological activity. The chemistries of spin trapping and spin adduct reveal insights on the possible roles of nitrones for altering cellular redox status through radical scavenging or nitric oxide donation, and their biological effects are presented. An interdisciplinary approach towards the development of novel synthetic antioxidants with improved pharmacological properties encompassing theoretical, synthetic, biochemical and in vitro/in vivo studies is covered.
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Ihm SH, Jang SW, Kim OR, Chang K, Oak MH, Lee JO, Lim DY, Kim JH. Decaffeinated green tea extract improves hypertension and insulin resistance in a rat model of metabolic syndrome. Atherosclerosis 2012; 224:377-83. [PMID: 22877868 DOI: 10.1016/j.atherosclerosis.2012.07.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 06/03/2012] [Accepted: 07/05/2012] [Indexed: 01/18/2023]
Abstract
BACKGROUND Oxidative stress and endothelial dysfunction are closely associated with hypertension and insulin resistance (IR) in metabolic syndrome (MetS). It is still controversial whether green tea extract (GTE) may have blood pressure (BP) lowering effect. Decaffeinated GTE might be presumed to have strong antioxidative effect and BP-lowering effect as compared with catechins. Thus we investigated whether decaffeinated-GTE could attenuate hypertension and IR by improving endothelial dysfunction and reducing oxidative stress in a rat model of MetS. METHODS AND RESULTS 20 Otsuka Long-Evans Tokushima Fatty (OLETF) rats at 13 weeks old, MetS rats, were randomized into a saline treated group (OLETF; n = 10) and a group treated with decaffeinated-GTE (25 mg/kg/day) (GTE-OLETF; n = 10). Intraperitoneal glucose tolerance tests and BP measurements were performed at 13 and 25 weeks. Decaffeinated-GTE significantly reduced BP (OLETF vs. GTE-OLETF; 130 ± 7 vs. 121 ± 3 mmHg, p = 0.01), fasting/postprandial 2 h glucose (141 ± 18/159 ± 13 vs. 115 ± 7/132 ± 16 mg/dL, p = 0.009/0.002) and insulin levels (4.8 ± 2.3 vs. 2.4 ± 1.3 ng/mL, p < 0.001). Decaffeinated-GTE significantly reduced vascular reactive oxygen species (ROS) formation and NADPH oxidase activity, and improved endothelium dependent relaxation in the thoracic aorta of OLETF rats. Decaffeinated-GTE also suppressed the expression of p47 and p22phox (NADPH oxidase subunits) in the immunohistochemical staining, and stimulated phosphorylation of endothelial nitric oxide synthase (eNOS) and Akt in the immunoblotting of aortas. CONCLUSIONS Decaffeinated-GTE reduced the formation of ROS and NADPH oxidase activity and stimulated phosphorylation of eNOS and Akt in the aorta of a rat model of MetS, which resulted in improved endothelial dysfunction and IR, and eventually lowered BP.
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Affiliation(s)
- Sang-Hyun Ihm
- Division of Cardiology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Cheng CC, Yang SP, Lin WS, Ho LJ, Lai JH, Cheng SM, Lin WY. Magnesium lithospermate B mediates anti-inflammation targeting activator protein-1 and nuclear factor-kappa B signaling pathways in human peripheral T lymphocytes. Int Immunopharmacol 2012; 13:354-61. [PMID: 22569344 DOI: 10.1016/j.intimp.2012.04.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Revised: 04/18/2012] [Accepted: 04/19/2012] [Indexed: 01/01/2023]
Abstract
The activation of T lymphocytes contributes to the inflammatory processes of atherosclerotic diseases. Danshen is a traditional Chinese medicine and has shown therapeutic effects in patients with cardiovascular and cerebrovascular diseases. We investigated the effects of aqueous extract of Danshen (magnesium lithospermate B (MLB)) on phorbol 12-myristate acetate+ionomycin and anti-CD3+anti-CD28 monoclonal antibody-activated T cells. We showed that MLB inhibited interleukin (IL)-2, IL-4, tumor necrosis factor-alpha and interferon-gamma production from activated T cells. The expressions of T cell activation markers CD 25 and CD 69 were effectively reduced. EMSA analysis indicated that MLB down-regulated activator protein-1 (AP-1), nuclear factor kappa B (NF-κB) and octamer binding transcription factor (Oct-1) DNA-binding activity. In addition, MLB inhibited c-jun N-terminal kinase (JNK) but not extracellular signal regulated protein kinase activity. MLB also inhibited IκBα degradation, nuclear translocation of p65 and p50 as well as decreased IκBα kinase (IKK) activity. Through suppressing JNK-AP-1, IKK-IκBα-NF-κB and Oct-1 signaling pathways by MLB in activated T cells, our results provide support for efficacy of MLB in inflammatory diseases and raise its therapeutic potential in activated T cell-mediated pathologies.
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Affiliation(s)
- Cheng-Chung Cheng
- Division of Cardiology, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, No. 325 Section 2 Cheng-Kung Road, Neihu, Taipei, Taiwan, ROC
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Kim WH, Jung DW, Kim J, Im SH, Hwang SY, Williams DR. Small molecules that recapitulate the early steps of urodele amphibian limb regeneration and confer multipotency. ACS Chem Biol 2012; 7:732-43. [PMID: 22270490 DOI: 10.1021/cb200532v] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In urodele amphibians, an early step in limb regeneration is skeletal muscle fiber dedifferentiation into a cellulate that proliferates to contribute new limb tissue. However, mammalian muscle cannot dedifferentiate after injury. We have developed a novel, small-molecule-based method to induce dedifferentiation in mammalian skeletal muscle. Muscle cellularization was induced by the small molecule myoseverin. Candidate small molecules were tested for the induction of proliferation in the cellulate. We observed that treatment with the small molecules BIO (glycogen synthase-3 kinase inhibitor), lysophosphatidic acid (pleiotropic activator of G-protein-coupled receptors), SB203580 (p38 MAP kinase inhibitor), or SQ22536 (adenylyl cyclase inhibitor) induced proliferation. Moreover, these proliferating cells were multipotent, as confirmed by the chemical induction of mesodermal-derived cell lineages. Microarray analysis showed that the multipotent, BIO-treated cellulate possessed a markedly different gene expression pattern than lineage-restricted C2C12 myoblasts, especially for genes related to signal transduction and differentiation. Sequential small molecule treatment of the muscle cellulate with BIO, SB203580, or SQ22536 and the aurora B kinase inhibitor, reversine, induced the formation of cells with neurogenic potential (ectodermal lineage), indicating the acquirement of pluripotency. This is the first demonstration of a small molecule method that induces mammalian muscle to undergo dedifferentiation and rededifferentiation into alternate cell lineages. This method induces dedifferentiation in a simple, stepwise approach and has therapeutic potential to enhance tissue regeneration in mammals.
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Affiliation(s)
| | | | | | | | - Seung Yong Hwang
- Department of Biochemistry, Hanyang University and GenoCheck Co., Ltd., Sa-Dong, Sangrok-Gu, Ansan, Gyeonggi-Do, 426-791,
Republic of Korea
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Yao Y, Li R, Ma Y, Wang X, Li C, Zhang X, Ma R, Ding Z, Liu L. α-Lipoic acid increases tolerance of cardiomyoblasts to glucose/glucose oxidase-induced injury via ROS-dependent ERK1/2 activation. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2012; 1823:920-9. [DOI: 10.1016/j.bbamcr.2012.02.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Revised: 01/19/2012] [Accepted: 02/07/2012] [Indexed: 11/25/2022]
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Han B, Zhang X, Zhang Q, Zhao G, Wei J, Ma S, Zhu W, Wei M. Protective effects of salvianolate on microvascular flow in a porcine model of myocardial ischaemia and reperfusion. Arch Cardiovasc Dis 2011; 104:313-24. [PMID: 21693368 DOI: 10.1016/j.acvd.2011.02.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Revised: 02/14/2011] [Accepted: 02/22/2011] [Indexed: 11/25/2022]
Abstract
BACKGROUND Microvascular reflow is crucial for myocyte survival during ischaemia/reperfusion injury. AIMS We aimed to assess if salvianolate, a highly purified aqueous extract from Radix salviae miltiorrhizae, could improve impaired microvascular reflow induced by ischaemia/reperfusion injury, using a porcine closed-chest model. METHODS Left anterior descending coronary artery ligation was created by balloon occlusion for 2 h followed by reperfusion for 14 days. Salvianolate was administrated intravenously for 7 days at low dose (5 mg/kg/day), high dose (10 mg/kg/day) or high dose combined with one 20 mg intracoronary bolus injection just at the beginning of reperfusion. Control-group animals were only given the same volume of saline. RESULTS After 14 days of reperfusion, animals treated with high-dose salvianolate showed improved myocardial perfusion assessed by real-time myocardial contrast echocardiography and coloured microspheres. The beneficial effect was further supported by increased capillary density and decreased infarct size. All these effects eventually resulted in well-preserved cardiac function detected by echocardiography. Moreover, we also demonstrated that salvianolate administration was associated with elevated superoxide dismutase activity, thioredoxin activity and glutathione concentration, and reduced malondialdehyde concentration, which, in turn, resulted in a significant decrease in terminal deoxynucleotide transferase-mediated dUTP nick end labelling-positive cells and an increased ratio of Bcl-2 to Bax expression. CONCLUSION Intravenous salvianolate at a dose of 10 mg/kg/day for 7 days had significant beneficial effects on myocardial microvascular reflow, which were associated with decreased oxidative stress and apoptosis.
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Affiliation(s)
- Beibei Han
- Division of Cardiology, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University School of Medicine, China
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Ghanim H, Sia CL, Korzeniewski K, Lohano T, Abuaysheh S, Marumganti A, Chaudhuri A, Dandona P. A resveratrol and polyphenol preparation suppresses oxidative and inflammatory stress response to a high-fat, high-carbohydrate meal. J Clin Endocrinol Metab 2011; 96:1409-14. [PMID: 21289251 PMCID: PMC3085195 DOI: 10.1210/jc.2010-1812] [Citation(s) in RCA: 174] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND High-fat, high-carbohydrate (HFHC) meals are known to induce oxidative and inflammatory stress, an increase in plasma endotoxin concentrations, and an increase in the expression of suppressor of cytokine signaling-3 (SOCS-3). HYPOTHESIS The intake of a nutritional supplement containing resveratrol and muscadine grape polyphenols reduces HFHC meal-induced oxidative and inflammatory stress and stimulates the activity of the antioxidant transcription factor, NF-E2-related factor-2 (Nrf-2), and its downstream targets. METHODS Ten normal, healthy subjects were given a 930-kcal HFHC meal either with placebo or with the supplement. Indices of oxidative stress, inflammation, Nrf-2 binding activity, the concentrations of endotoxin (lipopolysaccharide) and lipoprotein binding protein (LBP), and the expression of toll-like receptor 4 (TLR-4), CD14, IL-1β, TNFα, SOCS-3, Keap-1, NAD(P)H:quinone oxidoreductase-1 (NQO-1), and GST-P1 were measured. RESULTS The intake of the supplement suppressed the meal-induced elevations of plasma endotoxin and LBP concentrations, the expression of p47(phox), TLR-4, CD14, SOCS-3, IL-1β, and Keap-1, while enhancing Nrf-2 binding activity and the expression of NQO-1 and GST-P1 genes. CONCLUSION A supplement containing resveratrol and muscadine polyphenols suppresses the increase in oxidative stress, lipopolysaccharide and LBP concentrations, and expression of TLR-4, CD14, IL-1β and SOCS-3 in mononuclear cells after an HFHC meal. It also stimulates specific Nrf-2 activity and induces the expression of the related antioxidant genes, NQO-1 and GST-P1. These results demonstrate the acute antioxidant and antiinflammatory effects of resveratrol and polyphenolic compounds in humans in the postprandial state.
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Affiliation(s)
- Husam Ghanim
- Division of Endocrinology, Diabetes, and Metabolism, State University of New York at Buffalo, and Kaleida Health, Buffalo, New York 14209, USA
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Cudmore MJ, Ahmad S, Sissaoui S, Ramma W, Ma B, Fujisawa T, Al-Ani B, Wang K, Cai M, Crispi F, Hewett PW, Gratacós E, Egginton S, Ahmed A. Loss of Akt activity increases circulating soluble endoglin release in preeclampsia: identification of inter-dependency between Akt-1 and heme oxygenase-1. Eur Heart J 2011; 33:1150-8. [PMID: 21411816 PMCID: PMC3341632 DOI: 10.1093/eurheartj/ehr065] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
AIMS Endothelial dysfunction is a hallmark of preeclampsia. Desensitization of the phosphoinositide 3-kinase (PI3K)/Akt pathway underlies endothelial dysfunction and haeme oxygenase-1 (HO-1) is decreased in preeclampsia. To identify therapeutic targets, we sought to assess whether these two regulators act to suppress soluble endoglin (sEng), an antagonist of transforming growth factor-β (TGF-β) signalling, which is known to be elevated in preeclampsia. METHODS AND RESULTS Vascular endothelial growth factor-A (VEGF-A), fibroblast growth factor (FGF-2), angiopoietin-1 (Ang-1), and insulin, which all activate the PI3K/Akt pathway, inhibited the release of sEng from endothelial cells. Inhibition of the PI3K/Akt pathway, by overexpression of phosphatase and tensin homolog (PTEN) or a dominant-negative isoform of Akt (Akt(dn)) induced sEng release from endothelial cells and prevented the inhibitory effect of VEGF-A. Conversely, overexpression of a constitutively active Akt (Akt(myr)) inhibited PTEN and cytokine-induced sEng release. Systemic delivery of Akt(myr) to mice significantly reduced circulating sEng, whereas Akt(dn) promoted sEng release. Phosphorylation of Akt was reduced in preeclamptic placenta and this correlated with the elevated level of circulating sEng. Knock-down of Akt using siRNA prevented HO-1-mediated inhibition of sEng release and reduced HO-1 expression. Furthermore, HO-1 null mice have reduced phosphorylated Akt in their organs and overexpression of Akt(myr) failed to suppress the elevated levels of sEng detected in HO-1 null mice, indicating that HO-1 is required for the Akt-mediated inhibition of sEng. CONCLUSION The loss of PI3K/Akt and/or HO-1 activity promotes sEng release and positive manipulation of these pathways offers a strategy to circumvent endothelial dysfunction.
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Affiliation(s)
- Melissa J Cudmore
- University / BHF Centre for Cardiovascular Science, Queen's Medical Research Institute, College of Medicine and Veterinary Medicine, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
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Jung DW, Ha HH, Zheng X, Chang YT, Williams DR. Novel use of fluorescent glucose analogues to identify a new class of triazine-based insulin mimetics possessing useful secondary effects. MOLECULAR BIOSYSTEMS 2010; 7:346-58. [PMID: 20927436 DOI: 10.1039/c0mb00089b] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
There is an urgent need to discover new compounds that effectively treat diabetes by mimicking the action of insulin (insulin mimetics). Traditional approaches to studying anti-diabetic agents in cells are inconvenient for screening chemical libraries to identify insulin mimetics. 2-(N-(7-Nitrobenz-2-oxa-1,3-diazol-4-yl)amino)-2-deoxyglucose (2-NBDG) and 6-NBDG are fluorescent analogues of glucose that could be employed in screening. However, there are no published data about the use of these analogues to identify new insulin mimetics. We have developed a screening system based on 6-NBDG using 3T3-L1 adipocytes in a 96-well culture plate format. 6-NBDG was found to produce a larger signal than 2-NBDG in this screening system. 6-NBDG uptake in 3T3-L1 adipocytes was sensitive to insulin, known insulin mimetics, inhibitors of glucose transport and insulin-sensitizing compounds. To validate our screening system, a chemical library of 576 tagged, triazine-based small molecules was screened. The screening results were identical to that obtained from a commercial enzyme-based glucose assay. Two inducers of glucose uptake were shown to be non-cytotoxic and confirmed as insulin mimetic compounds by their inhibition of epinephrine-stimulated free fatty acid release from adipocytes. These novel insulin mimetics functioned at a markedly lower concentration than two widely studied insulin mimetics, zinc(ii) complexes and vanadium compounds, and also showed novel, beneficial effects on endothelial cell function (a key determinant of secondary complications in diabetes). The discovery of new insulin mimetics using 6-NBDG validates the use of this probe in the development of large-scale, cell-based screening systems based on the uptake of fluorescent-tagged glucose analogues. This research should aid the development of novel strategies to discover new drugs and drug targets for combating the increasing prevalence of diabetes.
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Affiliation(s)
- Da-Woon Jung
- Small Molecule Regulators and Biosystems Laboratory, School of Life Sciences, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-Gu, Gwangju 500-712, Republic of Korea
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Xu ZR, Hu L, Cheng LF, Qian Y, Yang YM. Dihydrotestosterone protects human vascular endothelial cells from H(2)O(2)-induced apoptosis through inhibition of caspase-3, caspase-9 and p38 MAPK. Eur J Pharmacol 2010; 643:254-9. [PMID: 20599910 DOI: 10.1016/j.ejphar.2010.06.039] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2009] [Revised: 05/28/2010] [Accepted: 06/22/2010] [Indexed: 10/19/2022]
Abstract
Oxidative stress is proved to be harmful to the vascular endothelial cells which are important in preventing the formation and progression of atheromatous plaque. This study was designed to investigate the protective effect and potential mechanisms of dihydrotestosterone (DHT) against H(2)O(2)-induced apoptosis of human umbilical vein endothelial cells (ECV-304). ECV-304 cells were pretreated with different concentrations of DHT (0.01, 0.1 and 1 microM) for 2h, followed by exposure to 100 microM H(2)O(2) for 18h. 3-(4,5-dimethylthiazol-2yl-)-2,5-diphenyl tetrazolium bromide (MTT) assay was used to evaluate cell viability. To detect apoptosis, the cells were assessed by morphologic examination and Annexin V-propidium iodide double staining with flow cytometry. Finally, the expression of caspase-3, caspase-9 and phospho p38 MAPK was assayed by Western blot to investigate the possible molecular mechanisms. We found that H(2)O(2) treatment for 18h significantly decrease the viability of ECV-304 cells characterized by a high percentage of apoptotic cells. DHT could antagonize the apoptosis inducing effect of H(2)O(2) in a dose-dependent manner. Consistently, DHT also significantly inhibit the expression of caspase-3, caspase-9 and phospho p38 MAPK induced by H(2)O(2). In summary, pretreatment with DHT can inhibit apoptosis of ECV-304 cells induced by H(2)O(2). The protective effect of DHT was associated with the inhibition of caspase-3, caspase-9 and phospho p38 MAPK expression.
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Affiliation(s)
- Zhe-rong Xu
- Department of Geriatrics, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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