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Dewi RT, Primahana G, Septama AW, Angelina M, Meilawati L, Fajriah S, Swandiny GF. Quality control standardization of Indonesian noni fruit (Morinda citrifolia) extract and evaluation of their angiotensin-converting enzyme inhibitory activity. PHARMACIA 2022. [DOI: 10.3897/pharmacia.69.e86854] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Morinda citrifolia fruit (Noni) has been used as a folk medicine in several countries. Noni possessed various pharmacological activities such as; anticancer, antidiabetic, antihypertensive, antarthritic, and antioxidants. The present study evaluated pharmacognostic properties, profiling of active constituent through High-Performance Thin Layer Chromatography (HPTLC) and Liquid Chromatography-High Resolution Mass Spectrometer (LC-HRMS) run for quantitative and qualitative phytochemical analysis and determining angiotensin-converting enzyme (ACE) inhibitor activity of Noni from three different locations. The physicochemical parameters of crude drugs and extracts met the requirement of Indonesian Herbal Pharmacopeia. Total phenol content was 2.16-3.08 mg GAE/g extract and total flavonoid content was 0.11 - 1.58 mg QE/g extract. HPTLC analysis revealed that scopoletin content in Noni was in the range of 0.44 - 0.51%. The results were also corresponding well with LC-HRMS fingerprint analysis. In addition, Noni fruit extract from Bogor potential exhibited activity in inhibiting ACE with an IC50 value of 206.26 µg/mL.
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Paving New Roads Towards Biodiversity-Based Drug Development in Brazil: Lessons from the Past and Future Perspectives. ACTA ACUST UNITED AC 2021; 31:505-518. [PMID: 34548709 PMCID: PMC8447804 DOI: 10.1007/s43450-021-00181-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 08/25/2021] [Indexed: 11/29/2022]
Abstract
Although Brazil gathers two fundamental features to occupy a leading position on the development of biodiversity-based medicines, the largest flora on earth and a broad tradition on the use of medicinal plants, the number of products derived from the national genetic heritage is so far modest, either as single drugs or as herbal medicines. This article highlights some aspects that may have contributed to the low rates of success and proposes new insights for innovation. We initially approach the use of medicinal plants in Brazil, molded by its ethnic diversity, and the development of the local pharmaceutical industry. A discussion of some governmental initiatives to support plant-based drug development is then presented. Employing the economic concept of “middle-income trap,” we further propose that Brazil is stuck in a “middle-level science trap,” since the increase in the number of scientific publications that launched the country to an intermediate publishing position has not been translated into drug development. Two new approaches to escape from this trap are presented, which may result in innovative drug development. The first is based on the exploitation of the antifragility properties of herbal products aiming to investigate non-canonical pharmacodynamics mechanisms of action, aligned with the concepts of system biology. The second is the manufacture of herbal products based on the circular economy principles, including the use of byproducts for the development of new therapeutical agents. The adoption of these strategies may result in innovative phytomedicines, with global competitiveness.
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Silva RMGDA, Figueiredo CÉCM, Gomes AC, Ferreira PC, Granero FO, Santiago PS, Silva LP. Evaluation of the antigenotoxic and antioxidant activity induced by Croton antisyphiliticus. AN ACAD BRAS CIENC 2020; 92:e20190047. [PMID: 33084756 DOI: 10.1590/0001-3765202020190047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 06/17/2019] [Indexed: 11/22/2022] Open
Abstract
This study aimed to investigate antigenotoxicity and antioxidant potential of extract, fractions and vitexin from C. antisyphiliticus. Methanolic extract was fractionated through solvents of increasing polarity. The composition of extracts and fractions were evaluated through phytochemical screening. Micronucleus test was performed in mice to evaluate the antigenotoxicity. Antioxidant activity was measured using the assay 1,1-diphenyl-2-picrylhydrazyl (DPPH), iron ion chelating, thiobarbituric acid assay and nitric oxide scavenging. Treatment with extract, fractions and vitexin did not produce an increase in Micronucleus mean values. However, Micronucleus (MN) mean values decreased in relation to control. methanolic extract presented antioxidant potential for DPPH (81%), iron ion chelating (77.8%), Thiobarbituric Acid (TBARS) (32.49%) and Nitric Oxide (NO) (80.97%). Ethyl acetate fraction showed the highest antioxidant activity (65.46%). The vitexin showed a Inhibitory Concentration (IC50) of DPPH value smaller in relation to control. Vitexin flavonoid was detected by High Performance Liquid Chromatography (HPLC), infrared spectrometry and nuclear magnetic resonance. It can be inferred that methanolic extract, fraction ethyl acetate and vitexin isolated from C. antisyphiliticus is endowed with antigenotoxic and antioxidant potential.
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Affiliation(s)
- Regildo M G DA Silva
- Universidade Estadual Paulista/UNESP, Faculdade de Ciências e Letras de Assis, Departamento de Biotecnologia, Laboratório de Plantas Medicinais e Produtos Naturais, Av. Dom Antônio, 2100, Parque Universitário, 19806-900 Assis, SP, Brazil
| | - CÉlia C M Figueiredo
- Universidade Estadual Paulista/UNESP, Faculdade de Ciências e Letras de Assis, Departamento de Biotecnologia, Laboratório de Plantas Medicinais e Produtos Naturais, Av. Dom Antônio, 2100, Parque Universitário, 19806-900 Assis, SP, Brazil
| | - Amanda C Gomes
- Universidade Estadual Paulista/UNESP, Faculdade de Ciências e Letras de Assis, Departamento de Biotecnologia, Laboratório de Plantas Medicinais e Produtos Naturais, Av. Dom Antônio, 2100, Parque Universitário, 19806-900 Assis, SP, Brazil
| | - Paulo C Ferreira
- Universidade Estadual Paulista/UNESP, Faculdade de Ciências e Letras de Assis, Departamento de Biotecnologia, Laboratório de Plantas Medicinais e Produtos Naturais, Av. Dom Antônio, 2100, Parque Universitário, 19806-900 Assis, SP, Brazil
| | - Filipe O Granero
- Universidade Estadual Paulista/UNESP, Faculdade de Ciências e Letras de Assis, Departamento de Biotecnologia, Laboratório de Plantas Medicinais e Produtos Naturais, Av. Dom Antônio, 2100, Parque Universitário, 19806-900 Assis, SP, Brazil
| | - PatrÍcia S Santiago
- Universidade Estadual Paulista/UNESP, Campus de Registro, Av. Nelson Brihi Badur, 430, Vila Tupy, 11900-000 Registro, SP, Brazil
| | - Luciana P Silva
- Fundação Educacional do Município de Assis/FEMA, Av. Getulio Vargas, 1200, Vila Nova Santana, 19807-130 Assis, SP, Brazil
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Moreira LN, Feltrin C, Gonçalves JE, de Castro WV, Simões CMO, de Pádua RM, Cortes SF, Braga FC. Determination of l-(+)-bornesitol, the hypotensive constituent of Hancornia speciosa, in rat plasma by LC-MS/MS and its application on a pharmacokinetic study. Biomed Pharmacother 2020; 132:110900. [PMID: 33113433 DOI: 10.1016/j.biopha.2020.110900] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/02/2020] [Accepted: 10/14/2020] [Indexed: 10/23/2022] Open
Abstract
Hancornia speciosa is a medicinal plant with proven antihypertensive activity. The cyclitol l-(+)-bornesitol is the main constituent of its leaves and is a potent inhibitor of the angiotensin-converting enzyme. We herein investigated the pharmacokinetic properties of bornesitol administered orally to Wistar rats, as well as bornesitol permeation in Caco-2 cells. Bornesitol was isolated and purified from an ethanol extract of H. speciosa leaves. An ultra-high performance liquid chromatography coupled with electrospray ionization mass spectrometry (UPLC-ESI-MS/MS) method was developed and validated to quantify bornesitol in rat plasma based on Multiple Reaction Monitoring, using pentaerythritol as an internal standard. Pharmacokinetics was evaluated by the administration of single doses via intravenous in bolus (3 mg/kg) and gavage (3, 15 and 25 mg/kg). Bornesitol permeation was assayed in a transwell Caco-2 cells model, tested alone, or combined with rutin, or as a constituent of H. speciosa extract, using a developed and validated UPLC-ESI-MS/MS method. All assayed validation parameters (selectivity, residual effect, matrix effect, linearity, precision, accuracy and stability of analyte in plasma and solution) for the bioanalytical method met the acceptance criteria established by regulatory guidelines. Bornestiol reached peak plasma concentration within approximately 60 min after oral administration with a half-life ranging from 72.15 min to 123.69 min. The peak concentration and area under the concentration-time curve of bornesitol did not rise proportionally with the increasing doses, suggesting a non-linear pharmacokinetics in rats and the oral bioavailability ranged from 28.5%-59.3%. Bornesitol showed low permeability in Caco-2 cells, but the permeability apparently increased when it was administered either combined with rutin or as a constituent of H. speciosa extract. In conclusion, bornesitol was rapidly absorbed after a single oral administration to rats and followed a non-linear pharmacokinetics. The obtained data will be useful to guide further pre-clinical development of bornesitol-containing herbal preparations of H. speciosa as an antihypertensive agent.
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Affiliation(s)
- Luciana N Moreira
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, Brazil
| | - Clarissa Feltrin
- Department of Microbiology, Immunology and Parasitology, Center for Health Sciences, Universidade Federal de Santa Catarina, R. Eng. Agronômico Andrei Cristian Ferreira, s/n, Florianópolis, Brazil
| | - José E Gonçalves
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, Brazil
| | - Whocely V de Castro
- Núcleo de Pesquisa em Química Biológica, Universidade Federal de São João Del-Rey, Campus Centro-Oeste, R. Sebastião Gonçalves Coelho 400, Divinópolis, Brazil
| | - Cláudia M O Simões
- Department of Microbiology, Immunology and Parasitology, Center for Health Sciences, Universidade Federal de Santa Catarina, R. Eng. Agronômico Andrei Cristian Ferreira, s/n, Florianópolis, Brazil
| | - Rodrigo M de Pádua
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, Brazil
| | - Steyner F Cortes
- Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, Brazil
| | - Fernão C Braga
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, Brazil.
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Sharma A, Gupta S, Chauhan S, Nair A, Sharma P. ASTILBIN: A PROMISING UNEXPLORED COMPOUND WITH MULTIDIMENSIONAL MEDICINAL AND HEALTH BENEFITS. Pharmacol Res 2020; 158:104894. [PMID: 32407960 DOI: 10.1016/j.phrs.2020.104894] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 05/04/2020] [Accepted: 05/04/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND Many flavonoids have various beneficial actions like anti-inflammatory, anti-carcinogenic properties and many other clinical conditions. Astilbin is one such flavanoid compound having many physiological as well as pharmacological actions. PURPOSE To summarize the important findings from the research conducted using astilbin having significance to its physiological and pharmacological activities as well as the patents filed using astilbin. STUDY DESIGN Systematic review and compilation of the collected literature. METHOD An extensive investigation of literature was done using several worldwide electronic scientific databases like PUBMED, SCOPUS, Science Direct and Google Scholar etc. All the article available in the English language that used our compound of interest i.e. astilbin, on the basis of inclusion criteria decided were retrieved from these databases, thoroughly reviewed and were summarized. RESULT It has been established that astilbin can play a vital in the management of diseases associated with immune system. It also possesses antibacterial, anti-oxidative and hepatoprotective activity. CONCLUSION These researches provide evidence that astilbin possesses great potential and thus can be utilized in the management of various disorders, thus establishing itself as a potential candidate for novel drug development. Also, there is still room for research on astilbin like it can be evaluated for anticancer potential, protective effect in various diabetic complications and many more. Overall observations from data suggested that astilbin is a promising compound and proved its efficacy in every preclinical study which is conducted till date. Some of the pharmacological activity is still unexplored. After successful preclinical trials, astilbin can go for further clinical trials.
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Affiliation(s)
- Abhishek Sharma
- Department of Pharmacology, M. M. College of Pharmacy, M. M. (Deemeed to be University), Mullana, (Ambala), Haryana, India
| | - Sumeet Gupta
- Department of Pharmacology, M. M. College of Pharmacy, M. M. (Deemeed to be University), Mullana, (Ambala), Haryana, India.
| | - Samrat Chauhan
- Department of Pharmacology, M. M. College of Pharmacy, M. M. (Deemeed to be University), Mullana, (Ambala), Haryana, India
| | - Anroop Nair
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Prerna Sharma
- Department of Pharmacognosy, M M School of Pharmacy, M M University, Sadupur, Ambala, Haryana, India
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Moreira LN, Silva GC, Câmara DV, Pádua RM, Lemos VS, Braga FC, Cortes SF. The Cyclitol L-(+)-Bornesitol as an Active Marker for the Cardiovascular Activity of the Brazilian Medicinal Plant Hancornia speciosa. Biol Pharm Bull 2019; 42:2076-2082. [PMID: 31787722 DOI: 10.1248/bpb.b19-00601] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The cyclitol bornesitol is the main constituent of the leaves from the antihypertensive medicinal plant Hancornia speciosa. This study aimed to investigate the ability of bornesitol to reduce blood pressure and its mechanism of action. Normotensive Wistar rats were divided into control group and bornesitol groups treated intravenously with bornesitol (0.1, 1.0 and 3.0 mg/kg). Systolic blood pressure (SBP) and diastolic blood pressure (DBP) were recorded in non-anesthetized awake animals. Nitric oxide (NO) and angiotensin-converting enzyme (ACE) were measured in plasma by using colorimetric methods. Vascular reactivity study was performed in rat aorta rings and the involvement of nitric oxide synthase (NOS), calcium-calmodulin complex and phosphatidylinositol-3-kinase (PI3K)/Akt pathway in the vasodilator effect was investigated. Administration of bornesitol significantly reduced the SBP, increased the plasmatic level of nitrite, and decreased ACE activity in normotensive rats. In the rat aorta, bornesitol induced endothelium-dependent vasodilatation, which was abolished by NOS blockade. While calcium-calmodulin complex inhibition decreased the vasodilator effect of bornesitol, the inhibition of PI3K/Akt pathway did not alter it. Bornesitol reduced the blood pressure by a mechanism involving an increased production or bioavailability of NO, inhibition of ACE, and by an endothelium- and NO-dependent vasodilator effect. The present results support the use of bornesitol as an active marker for the cardiovascular activity of Hancornia speciosa.
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Affiliation(s)
- Luciana N Moreira
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais
| | - Grazielle C Silva
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais
| | - Diógenes V Câmara
- Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais
| | - Rodrigo M Pádua
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais
| | - Virgínia S Lemos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais
| | - Fernão C Braga
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais
| | - Steyner F Cortes
- Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais
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Palachai N, Wattanathorn J, Muchimapura S, Thukham-mee W. Antimetabolic Syndrome Effect of Phytosome Containing the Combined Extracts of Mulberry and Ginger in an Animal Model of Metabolic Syndrome. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:5972575. [PMID: 31827683 PMCID: PMC6881582 DOI: 10.1155/2019/5972575] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 09/16/2019] [Accepted: 09/21/2019] [Indexed: 12/15/2022]
Abstract
Due to the antimetabolic syndrome effect of mulberry and ginger together with the advantages of the synergistic effect and phytosome encapsulation technique, we hypothesized that phytosome containing the combined extracts of mulberry and ginger (PMG) should be able to manage MetS. PMG was developed and assessed the phenolic content and biological activities associated with the pathophysiology of MetS. The antimetabolic syndrome effect and the possible underlying mechanisms in the animal model of MetS were also assessed. Male Wistar rats induced MetS by subjecting to a 16-week high-carbohydrate high-fat diet. MetS rats were orally given PMG at doses of 50, 100, and 200 mg/kg for 21 days. They were determined metabolic parameter changes in serum, histomorphology changes of adipose tissue, the inflammatory cytokines such as IL-6 and TNF-α, oxidative stress status, PPAR-γ, and HDAC3 in adipose tissue. Our in vitro data showed that PMG increased phenolic contents and biological activities. PMG significantly improved MetS parameters including body weight gain, lipid profiles, plasma glucose, HOMA-IR, and ACE. In addition, the density and size of adipocyte, adiposity index, and weights of adipose tissues were also improved. Moreover, the decrease in TNF-α and IL-6, oxidative stress status, and HDAC3 expression together with the increase in PPAR-γ expression in adipose tissue was also observed. These data suggest that PMG exhibit antimetabolic syndrome and the possible underlying mechanism may be associated partly with the modulation effect on HDAC3, PPAR-γ, and adipose tissue. In addition, PMG also improves oxidative stress and inflammation in MetS. Therefore, PMG can be served as the potential supplement to manage MetS. However, a clinical trial study is essential to confirm this health benefit.
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Affiliation(s)
- Nut Palachai
- Department of Physiology and Graduate School (Neuroscience Program), Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
- Integrative Complementary Alternative Medicine Research, Khon Kaen University, Khon Kaen 40002, Thailand
- Research Institute for Human High Performance and Health Promotion, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Jintanaporn Wattanathorn
- Integrative Complementary Alternative Medicine Research, Khon Kaen University, Khon Kaen 40002, Thailand
- Research Institute for Human High Performance and Health Promotion, Khon Kaen University, Khon Kaen 40002, Thailand
- Department of Physiology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Supaporn Muchimapura
- Integrative Complementary Alternative Medicine Research, Khon Kaen University, Khon Kaen 40002, Thailand
- Research Institute for Human High Performance and Health Promotion, Khon Kaen University, Khon Kaen 40002, Thailand
- Department of Physiology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Wipawee Thukham-mee
- Integrative Complementary Alternative Medicine Research, Khon Kaen University, Khon Kaen 40002, Thailand
- Research Institute for Human High Performance and Health Promotion, Khon Kaen University, Khon Kaen 40002, Thailand
- Department of Physiology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
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Semis M, Gugiu GB, Bernstein EA, Bernstein KE, Kalkum M. The Plethora of Angiotensin-Converting Enzyme-Processed Peptides in Mouse Plasma. Anal Chem 2019; 91:6440-6453. [PMID: 31021607 DOI: 10.1021/acs.analchem.8b03828] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Angiotensin-converting enzyme (ACE) converts angiotensin I into the potent vasoconstrictor angiotensin II, which regulates blood pressure. However, ACE activity is also essential for other physiological functions, presumably through processing of peptides unrelated to angiotensin. The goal of this study was to identify novel natural substrates and products of ACE through a series of mass-spectrometric experiments. This included comparing the ACE-treated and untreated plasma peptidomes of ACE-knockout (KO) mice, validation with select synthetic peptides, and a quantitative in vivo study of ACE substrates in mice with distinct genetic ACE backgrounds. In total, 244 natural peptides were identified ex vivo as possible substrates or products of ACE, demonstrating high promiscuity of the enzyme. ACE prefers to cleave substrates with Phe or Leu at the C-terminal P2' position and Gly in the P6 position. Pro in P1' and Iso in P1 are typical residues in peptides that ACE does not cleave. Several of the novel ACE substrates are known to have biological activities, including a fragment of complement C3, the spasmogenic C3f, which was processed by ACE ex vivo and in vitro. Analyses with N-domain-inactive (NKO) ACE allowed clarification of domain selectivity toward substrates. The in vivo ACE-substrate concentrations in WT, transgenic ACE-KO, NKO, and CKO mice correspond well with the in vitro observations in that higher levels of the ACE substrates were observed when the processing domain was knocked out. This study highlights the vast extent of ACE promiscuity and provides a valuable platform for further investigations of ACE functionality.
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Affiliation(s)
- Margarita Semis
- Department of Molecular Imaging and Therapy, Diabetes and Metabolism Research Institute , Beckman Research Institute of the City of Hope , Duarte , California 91010 , United States
| | - Gabriel B Gugiu
- Department of Molecular Imaging and Therapy, Diabetes and Metabolism Research Institute , Beckman Research Institute of the City of Hope , Duarte , California 91010 , United States.,Mass Spectrometry & Proteomics Core Facility , Beckman Research Institute of the City of Hope , Duarte , California 91010 , United States
| | - Ellen A Bernstein
- Departments of Biomedical Sciences, Pathology and Laboratory Medicine , Cedars-Sinai Medical Center , Los Angeles , California 90048 , United States
| | - Kenneth E Bernstein
- Departments of Biomedical Sciences, Pathology and Laboratory Medicine , Cedars-Sinai Medical Center , Los Angeles , California 90048 , United States
| | - Markus Kalkum
- Department of Molecular Imaging and Therapy, Diabetes and Metabolism Research Institute , Beckman Research Institute of the City of Hope , Duarte , California 91010 , United States.,Mass Spectrometry & Proteomics Core Facility , Beckman Research Institute of the City of Hope , Duarte , California 91010 , United States
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Encapsulated Mulberry Fruit Extract Alleviates Changes in an Animal Model of Menopause with Metabolic Syndrome. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:5360560. [PMID: 31182993 PMCID: PMC6512299 DOI: 10.1155/2019/5360560] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 01/29/2019] [Accepted: 02/20/2019] [Indexed: 12/31/2022]
Abstract
Currently, the therapeutic strategy against metabolic syndrome and its complications is required due to the increasing prevalence and its impact. Due to the benefits of both mulberry fruit extract and encapsulation technology, we hypothesized that encapsulated mulberry fruit extract (MME) could improve metabolic parameters and its complication risk in postmenopausal metabolic syndrome. To test this hypothesis, female Wistar rats were induced experimental menopause with metabolic syndrome by bilateral ovariectomy (OVX) and high-carbohydrate high-fat (HCHF) diet. Then, they were orally given MME at doses of 10, 50, and 250 mg/kg BW for 8 weeks and the parameters, such as percentage of body weight gain, total cholesterol, triglycerides, HDL-C, LDL-C, atherogenic index, fasting blood glucose, plasma glucose area under the curve, serum angiotensin-converting enzyme (ACE), oxidative stress status, histology, and protein expression of PPAR-γ, TNF-α, and NF-κB in adipose tissues were determined. MME improved body weight gain, adiposity index, glucose intolerance, lipid profiles, atherogenic index, ACE, oxidative stress status, and protein expression of TNF-α and NF-κB. Moreover, MME attenuated adipocyte hypertrophy and enhanced PPAR-γ expression. Taken altogether, MME decreased metabolic syndrome and its complication via the increased PPAR-γ expression. Therefore, MME is the potential candidate for improving metabolic syndrome and its related complications. However, further research in clinical trial is still necessary.
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Gomes JHDS, da Silva GC, Côrtes SF, de Pádua RM, Braga FC. Forced degradation of l-(+)-bornesitol, a bioactive marker of Hancornia speciosa: Development and validation of stability indicating UHPLC-MS method and effect of degraded products on ACE inhibition. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1093-1094:31-38. [PMID: 29980101 DOI: 10.1016/j.jchromb.2018.06.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 05/10/2018] [Accepted: 06/20/2018] [Indexed: 12/11/2022]
Abstract
The antihypertensive activity of the medicinal plant Hancornia speciosa has been previously demonstrated by us, being the activity ascribed to polyphenols and cyclitols like l-(+)-bornesitol. We herein evaluated the stability of the bioactive marker bornesitol submitted to forced degradation conditions. Bornesitol employed in the study was isolated from H. speciosa leaves. An UHPLC-ESI-MS/MS method was developed to investigate bornesitol stability based on MRM (Multiple Reaction Monitoring) acquisition mode and negative ionization mode, employing both specific (m/z 193 → 161 Da) and confirmatory (m/z 193 → 175 Da) transitions. A gradient elution of 0.1% formic acid in water and acetonitrile was performed on a HILIC column. The method was validated and showed adequate linearity (r2 > 0.99), selectivity, specificity, accuracy, and precision (RSD < 2.9%). The method was robust for deliberate variations on dessolvation temperature, but not for changes in the flow rate and dessolvation gas. The results from the stability studies allowed us to classify bornesitol as labile for acidic and alkaline hydrolysis, but as very stable for oxidative and neutral hydrolysis exposure. Bornesitol was categorized as practically stable under photolysis degradation, whereas a considerable reduction on its contents was induced by metal ions and thermolysis exposure. Degraded samples from neutral hydrolysis and thermolysis were assayed in vitro for ACE inhibition and showed a substantial decrease in biological activity as compared to intact bornesitol. myo-Inositol was identified as the major degradation products in both matrices. This is the first report on bornesitol stability under different stress conditions and the obtained data are relevant for the development and quality control of standardized products from H. speciosa leaves.
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Affiliation(s)
- José Hugo de Sousa Gomes
- Departament of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, Brazil
| | - Grazielle Caroline da Silva
- Departament of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, Brazil
| | - Steyner F Côrtes
- Departament of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, Brazil
| | - Rodrigo Maia de Pádua
- Departament of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, Brazil
| | - Fernão Castro Braga
- Departament of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, Brazil.
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Moura A, Lima K, Sousa T, Marinho-Filho J, Pessoa C, Silveira E, Pessoa O, Costa-Lotufo L, Moraes M, Araújo A. In vitro antitumor effect of a lignan isolated from Combretum fruticosum, trachelogenin, in HCT-116 human colon cancer cells. Toxicol In Vitro 2018; 47:129-136. [DOI: 10.1016/j.tiv.2017.11.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 10/26/2017] [Accepted: 11/21/2017] [Indexed: 11/28/2022]
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Ahmad I, Yanuar A, Mulia K, Mun'im A. Review of Angiotensin-converting Enzyme Inhibitory Assay: Rapid Method in Drug Discovery of Herbal Plants. Pharmacogn Rev 2017; 11:1-7. [PMID: 28503045 PMCID: PMC5414448 DOI: 10.4103/phrev.phrev_45_16] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The renin-angiotensin-aldosterone system is a signaling pathway which responsible in the blood pressure regulation. Angiotensin-converting enzyme (ACE) is one of the key elements responsible for the hypertensive mechanism. It converts angiotensin-I to angiotensin-II. The discovery history of the ACE inhibitory activity assay method has been through a long stage for decades and development continues until today. The ACE inhibitory activity has become an effective screening method in the search for new antihypertensive agents from herbal plants. Some of in vitro assay methods were used to examine the activity of ACE inhibitors based on the substrate usage, such as; Cushman and Cheung Method using a substrate hippuryl-histidyl-leucine (HHL), Holmquist method using a substrate furanacryloyl-tripeptide, Elbl and Wagner method using a substrate benzoil-[l-14C] glicyl-L-histidine-L-leucine, Carmel and Yaron method using a substrate o-aminobenzoylglycyl-p-nitrophenylalanilproline, and Lam method using 3-hydroxybutyrylglycyl-glycyl-glycine as substrate. Several different methods to measure the results of enzymatic reactions or separating substrate with products, including spectrophotometric, fluorometric, high-performance liquid chromatography, electrophoresis, and radiochemistry. Application of the test method for screening the ACE inhibitors activity and investigation of active compounds from natural products can be done easily with this method, it is very helpful in research because the results obtained are simple, accurate, and rapid.
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Affiliation(s)
- Islamudin Ahmad
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Mulawarman University, Samarinda, East Kalimantan 75116, Depok, West Java 16424, Indonesia.,Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universitas Indonesia, Depok, West Java 16424, Indonesia
| | - Arry Yanuar
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universitas Indonesia, Depok, West Java 16424, Indonesia
| | - Kamarza Mulia
- Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Depok, West Java 16424, Indonesia
| | - Abdul Mun'im
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universitas Indonesia, Depok, West Java 16424, Indonesia
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Papan MK, Sharifi N, Zeeb M, Hosseini Sedeh SR, Amanlou M. Naphtoyl-Glycyl-Glycyl-Glycine: A New Substrate for Angiotensin Converting Enzyme (ACE) Assay Using HPLC. PHARMACEUTICAL SCIENCES 2016. [DOI: 10.15171/ps.2016.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Silva GC, Braga FC, Lemos VS, Cortes SF. Potent antihypertensive effect of Hancornia speciosa leaves extract. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2016; 23:214-219. [PMID: 26926183 DOI: 10.1016/j.phymed.2015.12.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 12/11/2015] [Accepted: 12/16/2015] [Indexed: 06/05/2023]
Abstract
BACKGROUND Hancornia speciosa Gomes is an herb traditionally used in Brazil for blood pressure control. PURPOSE The present work investigated the antihypertensive effect of an extract from Hancornia speciosa leaves (SFH) and analyzed its underlying mechanisms of action. METHODS Hypertension was induced in mice by surgical removal of a kidney and by subcutaneous administration of a pellet with deoxycorticosterone. Vasodilatation was measured in mesenteric arteries with a wire myograph. Nitrites were measured by fluorescence with 2,3-diaminonaphthalene and H2O2 was measured with carbon microsensors. RESULTS SFH (0.03, 0.1 or 1 mg/kg; po) induced a dose-dependent, long-lasting reduction in the systolic blood pressure in conscious DOCA-salt hypertensive mice (DOCA). Administration of SFH produced a significant increase in the plasmatic level of nitrites. The systemic inhibition of nitric oxide synthase by L-NAME (20 mg/kg) reduced its antihypertensive effect. SFH also induced a concentration-dependent vasodilatation of mesenteric resistance arteries contracted with phenylephrine, which was more potent in arteries from DOCA mice. Removal of the endothelium or pretreatment with L-NAME or catalase reduced the vasodilator response for SFH. The nitrite production induced by SFH was significantly bigger in mesenteric arteries from DOCA than in SHAM mice. However, the production of H2O2 induced by SFH was twice higher in DOCA mice. CONCLUSION Altogether, our results point to an antihypertensive effect of SFH due to a reduction in peripheral resistance through the production of NO and by a mechanism involving an increased production of H2O2 in the mesenteric arteries from hypertensive mice. These findings are further evidence to support the use of Hancornia speciosa by traditional medicine as an antihypertensive drug.
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Affiliation(s)
- Grazielle C Silva
- Department of Pharmacology, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil ; Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Fernão C Braga
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Virgínia S Lemos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Steyner F Cortes
- Department of Pharmacology, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil .
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Geller FC, Teixeira MR, Pereira ABD, Dourado LPA, Souza DG, Braga FC, Simões CMO. Evaluation of the Wound Healing Properties ofHancornia speciosaLeaves. Phytother Res 2015; 29:1887-93. [DOI: 10.1002/ptr.5438] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 07/22/2015] [Accepted: 07/28/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Fabiana Cristina Geller
- Department of Pharmaceutical Sciences, Center of Health Sciences; Universidade Federal de Santa Catarina; Campus Trindade Florianópolis SC 88.040-900 Brazil
| | - Marina Rodrigues Teixeira
- Department of Pharmaceutical Sciences, Center of Health Sciences; Universidade Federal de Santa Catarina; Campus Trindade Florianópolis SC 88.040-900 Brazil
| | - Ana Bárbara Dias Pereira
- Department of Pharmaceutical Products, Faculty of Pharmacy; Federal University of Minas Gerais; Belo Horizonte MG Brazil
| | - Luana Pereira Antunes Dourado
- Department of Microbiology, Institute of Biological Sciences; Universidade Federal de Minas Gerais; Campus Pampulha Belo Horizonte MG 31.270-901 Brazil
| | - Danielle G. Souza
- Department of Microbiology, Institute of Biological Sciences; Universidade Federal de Minas Gerais; Campus Pampulha Belo Horizonte MG 31.270-901 Brazil
| | - Fernão Castro Braga
- Department of Pharmaceutical Products, Faculty of Pharmacy; Federal University of Minas Gerais; Belo Horizonte MG Brazil
| | - Cláudia Maria Oliveira Simões
- Department of Pharmaceutical Sciences, Center of Health Sciences; Universidade Federal de Santa Catarina; Campus Trindade Florianópolis SC 88.040-900 Brazil
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Docking studies and biological activity of fosinopril analogs. INTERNATIONAL JOURNAL OF MEDICINAL CHEMISTRY 2014; 2014:721834. [PMID: 25383221 PMCID: PMC4207403 DOI: 10.1155/2014/721834] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 05/12/2014] [Accepted: 05/13/2014] [Indexed: 11/26/2022]
Abstract
The purpose of the present study was to determine the angiotensin-I converting enzyme inhibitory activity of few novel Fosinopril derivatives which were predicted to possess better ACE inhibitory activity and lesser side effects than the existing drug molecule. In vitro study was carried out to determine ACE inhibitory activity of six different Fosinopril analogs by spectrophotometric assay procedure. Analog A2 showed the highest activity compared to other analogs and as well as Fosinopril itself. Docking studies of the compounds were done with the help of VLife MDS 3.0 software using GRIP batch docking method to find out which derivative had a better docking with ACE. The compounds which showed the highest negative score in docking have also exhibited good ACE inhibitory activity.
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Sheng S, Wang Y, Long C, Su W, Rong X. Chinese medicinal formula Fufang Xueshuantong capsule could inhibit the activity of angiotensin converting enzyme. BIOTECHNOL BIOTEC EQ 2014; 28:322-326. [PMID: 26019516 PMCID: PMC4433917 DOI: 10.1080/13102818.2014.911611] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 07/08/2013] [Indexed: 12/25/2022] Open
Abstract
Fufang Xueshuantong (FXST) capsule, a Chinese medicinal formula composed of four herbals – Panax notoginseng, Radix Astragali, Radix Salvia Miltiorrhizae and Radix Scrophulariaceae, has been used to treat cardiovascular diseases for many years, but the pharmacological mechanisms underlying its effects has not been clarified. This study investigates if a connection between FXST and angiotensin converting enzyme (ACE) might be an explanation for its pharmacological effects. ACE inhibition assay was performed on FXST capsule, 50% ethanol extracts from the four herbals and three selected saponins most abundant in P. notoginseng (Ginsenoside Rg1, Ginsenoside Rb1 and Notoginsenoside R1) using a biochemical test. Reversed-phase high-performance liquid chromatography of liberated hippuric acid from the ACE assay was conducted to determine the inhibitory effect. As a result, FXST and extracts from P. notoginseng showed a significant and dose-dependent inhibition on ACE activity with the IC50 values of 115 μg/ml and 179 μg/ml, respectively. But extracts from the other three herbals and the three selected saponins had no significant effect on ACE inhibition. Compared to other reported plant extracts, FXST could be considered as an effective ACE inhibitor. The inhibition of ACE activity supports the traditional use of FXST on blood circulation and the inhibitory property of FXST is mainly caused by P. notoginseng.
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Affiliation(s)
- Shujing Sheng
- Guangzhou Quality R&D Center of Traditional Chinese Medicine, Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University , Guangzhou , PR China ; Guangdong Zhongsheng Pharmaceutical Co., Ltd. , Dongguan , PR China
| | - Yonggang Wang
- Guangzhou Quality R&D Center of Traditional Chinese Medicine, Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University , Guangzhou , PR China
| | - Chaofeng Long
- Guangdong Zhongsheng Pharmaceutical Co., Ltd. , Dongguan , PR China
| | - Weiwei Su
- Guangzhou Quality R&D Center of Traditional Chinese Medicine, Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University , Guangzhou , PR China
| | - Xia Rong
- Guangzhou Blood Center , Guangzhou , 510095 , China
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Triterpenes from the Protium heptaphyllum resin – chemical composition and cytotoxicity. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2014. [DOI: 10.1016/j.bjp.2014.06.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Free Radicals Scavenging Capacity, Antidiabetic and Antihypertensive Activities of Flavonoid-Rich Fractions from Leaves of Trichilia emetica and Opilia amentacea in an Animal Model of Type 2 Diabetes Mellitus. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 2014:867075. [PMID: 24616741 PMCID: PMC3926250 DOI: 10.1155/2014/867075] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Accepted: 11/05/2013] [Indexed: 02/07/2023]
Abstract
Trichilia emetica and Opilia amentacea traditional Burkinabe medicinal plants were investigated to determine their therapeutic potential to inhibit key enzymes in carbohydrate metabolism, which has relevance to the management of type 2 diabetes. In vitro and in vivo antioxidant and antihypertensive potential and antilipidemia and antihyperglycemia activities in an animal model of type 2 diabetes mellitus have been studied. The antioxidant activity of the flavonoids from leaves of Trichilia emetica and Opilia amentacea has been evaluated using β -carotene-linoleic acid system, 1,1-diphenyl-2-picrylhydrazyl inhibitory activity, chelation of iron (II) ions, and lipid peroxidation which showed more pronounced antioxidant capacities of Trichilia emetica. Total cholesterol concentrations decreased in an animal model of type 2 diabetes mellitus under effects of flavonoid-rich fractions from leaves of Trichilia emetica and Opilia amentacea has been observed. Extract of flavonoid-rich fractions from Trichilia emetica shown maximum radical scavenging activity and possessed marked antiamylase activity which may be due to the presence of certain secondary metabolites. Suggested better antihyperglycemia, antilipidemia, and antihypertensive properties of flavonoid-rich fractions from Trichilia emetica compared to the extract of Opilia amentacea are demonstrating antidiabetic potential of Trichilia emetica as therapeutic targets for the management of type 2 diabetes.
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Ivanov SA, Garbuz SA, Malfanov IL, Ptitsyn LR. Screening of Russian medicinal and edible plant extracts for angiotensin I-converting enzyme (ACE I) inhibitory activity. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2013. [DOI: 10.1134/s1068162013070054] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Aremu AO, Van Staden J. The genus Tulbaghia (Alliaceae)--a review of its ethnobotany, pharmacology, phytochemistry and conservation needs. JOURNAL OF ETHNOPHARMACOLOGY 2013; 149:387-400. [PMID: 23838476 DOI: 10.1016/j.jep.2013.06.046] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 06/25/2013] [Accepted: 06/26/2013] [Indexed: 06/02/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Tulbaghia is a monocotyledonous genus of herbaceous perennial bulbs predominantly found in Africa. The approximately 63 species have nutritive, ornamental and medicinal value. For centuries, several Tulbaghia species have found diverse uses in traditional medicine. AIM OF THE REVIEW To evaluate and document the uses, especially the medicinal value of the genus Tulbaghia. The existing gaps in knowledge and possible means for greater development are highlighted. METHODS A comprehensive and detailed literature search using electronic search (for example, Google Scholar, Scirus and Web of Science) and ethnobotanical books was conducted. RESULTS Findings based on their traditional uses and scientific evaluation indicates that Tulbaghia violacea remain the most widely used species. Compiled data indicate their efficacy in several in vitro and in vivo pharmacological properties such as antimicrobial, anti-hypertensive, antioxidant and anti-cancer activities. Some phytochemicals which are partly associated with the exhibited bioactivities have been identified and isolated from Tulbaghia violacea and Tulbaghia alliacea. The increasing high usage especially the underground organs, as well as the incessant reliance on the wild population, will eventually affect their abundance and possibly make them susceptible to extinction. CONCLUSIONS The great potential of the genus Tulbaghia, particularly other less popular species, remain to be exploited. Further studies on the structural activity relationship of some of the isolated compound may improve their biological potency. Their characteristic alliaceous aroma may also be of great interest to the food industry seeking novel source of unusual aromas to satisfy increasing consumer demands. In order to derive the much anticipated benefits from the species without compromising their conservation status, the use of different biotechnological approaches highlighted in this review will certainly guarantee their continuous availability.
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Affiliation(s)
- Adeyemi O Aremu
- Research Centre for Plant Growth and Development, School of Life Sciences, University of KwaZulu-Natal, Scottsville 3209, South Africa
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Comparison of analytical methods to assay inhibitors of angiotensin I-converting enzyme. Food Chem 2013; 141:3329-34. [PMID: 23993489 DOI: 10.1016/j.foodchem.2013.06.048] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Revised: 05/21/2012] [Accepted: 06/12/2013] [Indexed: 11/23/2022]
Abstract
The linearity, precision and repeatability of visible spectrophotometric (VSP) and high-performance liquid chromatography (HPLC) methods for analysis of inhibitory activity of angiotensin I-converting enzyme (ACE) were compared by using several inhibitors and Hip-His-Leu (HHL) as substrates. IC50 values (concentration at which ACE activity is inhibited by 50%) of 0.00206±0.00005 μg/mL for captopril, 192±4.53 μg/mL for soybean peptides, and 153±4.29 μg/mL for grass carp peptides determined by the VSP method, and these values were 1.07, 1.07, 1.18 and 1.44-fold, respectively, higher than those from the HPLC method. In addition, the inhibitory constant (Ki value) of captopril was determined to be 7.09 nM and 4.94 nM using VSP and HPLC method, respectively. These results showed that the HPLC method revealed a higher level of sensitivity and precision, suitable for assaying ACE inhibition activity of antihyper-sensitive peptides. In contrast, the VSP method can simultaneously measure several samples with simple operations, suitable for analysis of ACE inhibition activity of food protein enzymatic hydrolysates.
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Botanicals as Angiotensin Converting Enzyme Inhibitors Useful in Hypertension. CARDIOVASCULAR DISEASES 2013. [DOI: 10.1201/b14663-34] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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Franquni JVM, do Nascimento AM, de Lima EM, Brasil GA, Heringer OA, Cassaro KODS, da Cunha TVP, Musso C, Silva Santos MCLF, Kalil IC, Endringer DC, Boëchat GAP, Bissoli NS, de Andrade TU. Nandrolone decanoate determines cardiac remodelling and injury by an imbalance in cardiac inflammatory cytokines and ACE activity, blunting of the Bezold-Jarisch reflex, resulting in the development of hypertension. Steroids 2013; 78:379-85. [PMID: 23287648 DOI: 10.1016/j.steroids.2012.12.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Revised: 11/27/2012] [Accepted: 12/05/2012] [Indexed: 10/27/2022]
Abstract
The aims of this study were to evaluate the effects of nandrolone (ND) on cardiac inflammatory cytokines, ACE activity, troponin I, and the sensitivity of the Bezold-Jarisch reflex (BJR). Male Wistar rats were administered either ND (20 mg/kg; DECA) or vehicle (control animals; CONT) for 4 weeks. BJR was analyzed by measuring the bradycardia and hypotension responses elicited by serotonin administration (2-32 μg/kg). Mean arterial pressure (MAP) was assessed and myocyte hypertrophy was determined by the heart weight/body weight ratio and by morphometric analysis. Matrix collagen deposition was assessed by histological analysis of the picrosirius red-stained samples. Mesenteric vascular reactivity was performed and central venous pressure (CVP) evaluated. Cardiac inflammatory cytokine levels and angiotensin-converting enzyme (ACE) activity were studied as well the biomarker of cardiac lesion, troponin I. DECA group showed enhancement of matrix type I collagen deposition (p < 0.01) and cardiac ACE activity (p < 0.01) compared with the CONT. Interleukin (IL)-10 was reduced (p < 0.01) and pro-inflammatory cytokines (TNF-α and IL-6; p < 0.01) were increased in the DECA group compared with CONT. Cardiac injury was observed in the DECA group shown by the reduction in cardiac troponin I (p < 0.01) compared with the CONT group. Animals in the DECA group also developed myocyte hypertrophy and reduction of BJR sensitivity. The MAP of animals treated with ND reached hypertensive levels (p < 0.01; compared with CONT). No changes in CVP and vascular reactivity were observed in both experimental groups. We conclude that high doses of ND elicit cardiotoxic effects with cardiac remodelling and injury. Cardiac changes reduce the BJR sensitivity. Together, these abnormalities contributed to the development of hypertension in animals in the DECA group.
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Bioactivities of the genus Combretum (Combretaceae): a review. Molecules 2012; 17:9142-206. [PMID: 22858840 PMCID: PMC6268318 DOI: 10.3390/molecules17089142] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 07/23/2012] [Accepted: 07/25/2012] [Indexed: 11/16/2022] Open
Abstract
The Combretaceae is a large family of herbs, shrubs and trees, comprising about 20 genera and 600 species with tropical distribution around the globe and centers of diversity in Africa and Asia. Some Combretum species are extensively used in traditional medicine against inflammation, infections, diabetes, malaria, bleeding, diarrhea and digestive disorders and others as a diuretic. The present work is a literature survey of Combretum species that have been evaluated for their ability to exert biological activities. A total number of 36 Combretum species are discussed with regard to plant parts used, component tested and bioassay models. This review is of fundamental importance to promoting studies on Combretum species, thereby contributing to the development of new therapeutic alternatives that may improve the health of people suffering from various health problems.
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Lagemann A, Dunkel A, Hofmann T. Activity-guided discovery of (S)-malic acid 1'-O-β-gentiobioside as an angiotensin I-converting enzyme inhibitor in lettuce (Lactuca sativa). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:7211-7. [PMID: 22762370 DOI: 10.1021/jf3022157] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Angiotensin-converting enzyme (ACE), playing a crucial role in the renin angiotensin aldosterone system, is well-known to catalyze the conversion of the decapeptide angiotensin I into the physiologically active octapeptide angiotensin II, triggering blood pressure increasing mechanisms. To meet the demand for natural phytochemicals as antihypertensive agents in functional food development, extracts prepared from a series of vegetables were screened for their ACE-inhibitory activity by means of a LC-MS/MS-based in vitro assay. By far the highest ACE inhibition was found for a lettuce extract, in which the most active compound was located by means of activity-guided fractionation. LC-MS, NMR spectroscopy, and hydrolysis experiments followed by ion chromatography led to the unequivocal identification of the ACE inhibitor as the previously not reported (S)-malic acid 1'-O-β-gentiobioside. This glycoside represents a novel class of ACE-inhibiting phytochemicals with a low IC(50) value of 27.8 μM. First incubation experiments in saliva and aqueous hydrochloric acid demonstrated the stability of (S)-malic acid 1'-O-β-gentiobioside against salivary glycosidases and stomach acid.
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Affiliation(s)
- Annika Lagemann
- Chair of Food Chemistry and Molecular Sensory Science, Technische Universität München, Lise-Meitner-Strasse 34, D-85354 Freising-Weihenstephan, Germany
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Development and validation of an HPLC-DAD method for quantification of bornesitol in extracts from Hancornia speciosa leaves after derivatization with p-toluenesulfonyl chloride. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 887-888:133-7. [DOI: 10.1016/j.jchromb.2012.01.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Revised: 01/09/2012] [Accepted: 01/14/2012] [Indexed: 11/19/2022]
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Vasantha K, Murugesh C, Sattur A. Rapid screening of enzyme inhibitors using Profiling of Enzyme-Metabolite Assay by HPLC (PREMA-HPLC). J Enzyme Inhib Med Chem 2012; 27:132-7. [DOI: 10.3109/14756366.2011.580744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- K.Y. Vasantha
- Fermentation Technology and Bioengineering Department, Central Food Technological Research Institute, Mysore, Karnataka, India
| | - C.S. Murugesh
- Fermentation Technology and Bioengineering Department, Central Food Technological Research Institute, Mysore, Karnataka, India
| | - A.P. Sattur
- Fermentation Technology and Bioengineering Department, Central Food Technological Research Institute, Mysore, Karnataka, India
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Silva GC, Braga FC, Lima MP, Pesquero JL, Lemos VS, Cortes SF. Hancornia speciosa Gomes induces hypotensive effect through inhibition of ACE and increase on NO. JOURNAL OF ETHNOPHARMACOLOGY 2011; 137:709-713. [PMID: 21756990 DOI: 10.1016/j.jep.2011.06.031] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Revised: 06/02/2011] [Accepted: 06/18/2011] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The leaves of Hancornia speciosa Gomes are popularly used in Brazil to treat diabetes and hypertension. Cardiovascular diseases are the main cause of death worldwide and their incidences are increasing in Brazilian population. The present study aimed to investigate the hypotensive effect and the mechanism of action of Hancornia speciosa Gomes. METHODS A fraction of the ethanolic extract of leaves from Hancornia speciosa (SFH) was obtained and standardized by its content on rutin, bornesitol and quinic acid. Systolic blood pressure (SBP) of normotensive mice was measured by tail plethysmography. SFH was given orally and SBP was monitored for 5h. Angiotensin-converting enzyme (ACE) inhibitor activity of SFH (1mg/kg) or captopril (10mg/kg) was measured by colorimetric methods. Serum nitrite levels were measured by spectrophotometry. RESULTS SFH induced a dose-dependent hypotensive effect in normotensive mice. The serum activity of ACE and the level of angiotensin II were significantly reduced by SFH and by captopril. Administration of SFH induced a significant increase on plasmatic level of nitrites and the systemic inhibition of nitric oxide synthase by L-NAME (20mg/kg) reduced the hypotensive effect of SFH. CONCLUSIONS The present work demonstrated that Hancornia speciosa has a potent hypotensive effect in normotensive mice. The inhibition of ACE leading to reduction on angiotensin II and increase on NO levels might account for the hypotensive effect. These results support the use of Hancornia speciosa by traditional medicine as antihypertensive.
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Affiliation(s)
- G C Silva
- Department of Pharmacology, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Brazil
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Dong J, Xu X, Liang Y, Head R, Bennett L. Inhibition of angiotensin converting enzyme (ACE) activity by polyphenols from tea (Camellia sinensis) and links to processing method. Food Funct 2011; 2:310-9. [PMID: 21779569 DOI: 10.1039/c1fo10023h] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The focus of this study was to investigate Angiotensin Converting Enzyme (ACE) inhibiting activity across 34 teas (Camellia sinensis) produced by 5 different processing methods including green (GT), oolong (OT), white (WT), black (BT) and dark (DT) teas. In vitro ACE inhibitory activity was affected by the tea processing method with IC(50) values for ACE inhibition: green < oolong < white < black < dark teas. Substrate-dependence of the reaction kinetics was studied for GT and BT polyphenolic size fractions either < or > 3 kDa and also Green Tea Polyphenolic Isolate (GTPI), and revealed that enzyme velocity curves fitted allosteric, not Michaelis-Menten, relationships. Inhibition was weakly dependent on substrate concentration for GT fraction >3 kDa and independent of substrate concentration for all other GT and BT size fractions and GTPI. Furthermore, evidence for direct inactivation of ACE by GTPI was demonstrated. Overall, the results suggest that tea polyphenolics exert a mixed mode of in vitro inhibition of ACE, mostly of a kinetically uncompetitive type. The results are discussed in the context of in vivo and epidemiological evidence for regulation of blood pressure by tea consumption.
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Affiliation(s)
- Junjie Dong
- CSIRO Preventative Health Flagship, CSIRO Food and Nutritional Sciences, 671 Sneydes Road, Private Bag 16, Werribee, Victoria 3030, Australia
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31
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Lucas-Filho MD, Silva GC, Cortes SF, Mares-Guia TR, Perpétua Ferraz V, Serra CP, Braga FC. ACE inhibition by astilbin isolated from Erythroxylum gonocladum (Mart.) O.E. Schulz. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2010; 17:383-387. [PMID: 19879122 DOI: 10.1016/j.phymed.2009.09.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Revised: 08/07/2009] [Accepted: 09/14/2009] [Indexed: 05/28/2023]
Abstract
Erythroxylum species have several traditional uses in different countries, including the treatment of hypertension. The ethanol extract from E. gonocladum aerial parts, a species endemic to the Brazilian cerrado, elicited a concentration-dependent inhibition of angiotensin converting enzyme (ACE) (pIC(50)=4.53+/-0.05). Extract fractionation led to the isolation of two compounds, whose structures were assigned by spectrometric data as astilbin and beta-sitosterol, along with a mixture of palmitic, stearic and linolenic acids. This is the first report on the occurrence of these compounds on E. gonocladum. Astilbin promoted significant ACE inhibition in vitro (pIC(50)=5.86+/-0.33) and its activity did not differ from captopril, when both compounds were assayed at 10 microM concentration.
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Affiliation(s)
- M D Lucas-Filho
- School of Pharmacy, Universidade Federal de Ouro Preto, Ouro Preto, Brazil
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32
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Endringer DC, Pezzuto JM, Braga FC. NF-kappaB inhibitory activity of cyclitols isolated from Hancornia speciosa. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2009; 16:1064-1069. [PMID: 19423310 DOI: 10.1016/j.phymed.2009.03.022] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2009] [Accepted: 03/23/2009] [Indexed: 05/27/2023]
Abstract
Hancornia speciosa Gomes (Apocynaceae) is a Brazilian plant traditionally employed to treat inflammatory conditions, among other uses. The chemopreventive effect of an ethanol extract from H. speciosa leaves (EHS) was evaluated in a battery of in vitro tests [inhibition of aromatase, NF-kappaB and ornithine decarboxylase (ODC), antioxidant response elements (ARE) induction and cell proliferation assays]. Bioassay-directed fractionation of EHS following by inhibition of 12-O-tetradecanoyl-13-acetate (TPA)-mediated NF-kB activation led to the isolation of the cyclitols quinic acid (1) (85.0+/-12.3 microM) and l-(+)-bornesitol (2) (IC(50)=27.5+/-3.8 microM), along with rutin (26.8+/-6.3 microM). Based on these lead compounds, the cyclitols per-O-acetyl-1l-(+)-bornesitol (3) (IC(50)=38.4+/-6.2 microM), myo-inositol (4) (>180.2 microM), scyllo-inositol (5) (83.0+/-13.7 microM) and beta-d-galactoside-myo-inositol (6) (52.4+/-8.4 microM) were evaluated in the assay, but found to be somewhat less active than 1 and 2. None of the compounds was active in the ARE, aromatase or ODC assays and did not inhibit proliferation of MCF-7, LNCaP, HepG2 or LU-1 cell lines at a final concentration of 20 microg/ml (equivalent to 104.07-32.76 microM).This work identifies l-(+)-bornesitol, quinic acid and rutin as NF-kappaB inhibitors of H. speciosa and suggests cyclitols, in addition to myo-inositol, are potentially useful as chemopreventive agents.
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Affiliation(s)
- Denise C Endringer
- Faculdade de Farmácia, Universidade Federal de Minas Gerais, CEP 31270-901, Belo Horizonte, Brazil
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Jimsheena VK, Gowda LR. Colorimetric, High-Throughput Assay for Screening Angiotensin I-Converting Enzyme Inhibitors. Anal Chem 2009; 81:9388-94. [DOI: 10.1021/ac901775h] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- V. K. Jimsheena
- Department of Protein Chemistry and Technology, Central Food Technological Research Institute, Council of Scientific and Industrial Research, Mysore 570 020, India
| | - Lalitha R. Gowda
- Department of Protein Chemistry and Technology, Central Food Technological Research Institute, Council of Scientific and Industrial Research, Mysore 570 020, India
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Lam LH, Shimamura T, Manabe S, Ishiyama M, Ukeda H. Assay of angiotensin I-converting enzyme-inhibiting activity based on the detection of 3-hydroxybutyrate with water-soluble tetrazolium salt. ANAL SCI 2008; 24:1057-60. [PMID: 18689950 DOI: 10.2116/analsci.24.1057] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A newly synthesized substrate, 3-hydroxybutyrylglycyl-glycyl-glycine (3HB-GGG), was applied to the assay of ACE-inhibiting activity to overcome the smaller selectivity and sensitivity of the conventional method. In this study, an ACE-inhibiting assay was improved by the use of a water-soluble tetrazolium salt, 4-[3-(4-iodophenyl)-2-(4-nitrophenyl)-2H-5-tetrazolio]-1,3-benzene disulfonate sodium salt (WST-1), for the detection of 3-hydroxybutyrate, derived from 3HB-GGG. The optimized conditions were as follows: 0.333 mM NAD(+), 0.333 mM WST-1, 0.1 mM EDTA, 0.633 U ml(-1) diaphorase, and 0.700 U ml(-1) 3-hydroxybutyrate dehydrogenase. The developed assay was efficiently applicable to evaluate the ACE-inhibiting activity of practical ACE inhibitors.
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Affiliation(s)
- Le Hoang Lam
- Department of Bioresources Science, Faculty of Agriculture, Kochi University, Monobe B-200, Nankoku 783-8502, Japan
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Tejesvi MV, Kini KR, Prakash HS, Subbiah V, Shetty HS. Antioxidant, antihypertensive, and antibacterial properties of endophytic Pestalotiopsis species from medicinal plants. Can J Microbiol 2008; 54:769-80. [PMID: 18772940 DOI: 10.1139/w08-070] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Pestalotiopsis species were most dominant endophytic species isolated from four medicinal plants including Terminalia arjuna, Terminalia chebula, Azadirachta indica, and Holarrhena antidysenterica. Thirty Pestalotiopsis species isolated from different parts of the medicinal plants were selected for the study. The antioxidant and antihypertensive properties of Pestalotiopsis isolates were determined by measuring 1,1-diphenyl-2-picrylhydrazyl inhibitory activity, lipid peroxidation, and angiotensin-converting enzyme inhibition activity. Pestalotiopsis isolates of T. arjuna origin exhibited maximum radical scavenging activity compared with the others. The IC50 values of Pestalotiopsis extracts for 1,1-diphenyl-2-picrylhydrazyl scavenging activity ranged from 14 to 27 microg/mL compared with 15 and 6 microg/mL for butylated hydroxytoluene and ascorbic acid, respectively. The DNA damage study was also done for three isolates, TC-315, TA-37, and TA-60; TA-37 gave 80% protection. The IC50 values of Pestalotiopsis extracts for lipid peroxidation ranged between 30 and 35.5 microg/mL, while for the positive control butylated hydroxytoluene, it was 26 microg/mL. Out of 32 fungal extracts screened for antihypertensive assay, five (TA-37, TA-60, TA-102, TA-103, and TC-320) showed >60% inhibition of angiotensin-converting enzyme. The IC50 values for five extracts ranged from 21 to 37 microg/mL and was 20 microg/mL for captopril used as a positive control. The antibacterial activity was measured by the microplate-based turbidity measurement method. Four Pestalotiopsis extracts (TA-04, TA-37, TA-60, and TA-102) showed >75% inhibition against five bacterial strains including Bacillus subtilis, Escherichia coli, Pseudomonas fluorescens, Xanthomonas axonopodis pv. malvacearum, and Staphylococcus aureus. The antioxidant, antibacterial, and antihypertensive activities demonstrated the potential of Pestalotiopsis extracts as therapeutic targets.
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Affiliation(s)
- Mysore V Tejesvi
- Department of Studies in Applied Botany and Biotechnology, University of Mysore, Manasagangotri, Mysore-570 006, Karnataka, India.
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Moraes TDM, Rodrigues CM, Kushima H, Bauab TM, Villegas W, Pellizzon CH, Brito ARMS, Hiruma-Lima CA. Hancornia speciosa: indications of gastroprotective, healing and anti-Helicobacter pylori actions. JOURNAL OF ETHNOPHARMACOLOGY 2008; 120:161-168. [PMID: 18761076 DOI: 10.1016/j.jep.2008.08.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2008] [Revised: 07/28/2008] [Accepted: 08/02/2008] [Indexed: 05/26/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Mangaba (Hancornia speciosa Gomez) is a medicinal plant frequently cited in ethnopharmacological inventories of the central region of Brazil against gastrointestinal disorders such as diarrhoea, ulcer, gastritis and stomach ache. AIM OF THE STUDY The hydroalcoholic extract (HE) and infusion (BI) of Hancornia speciosa bark were investigated for their ability to prevent and heal rodent gastric ulcer. MATERIALS AND METHODS The preventive and healing action of both preparations of Hancornia speciosa were evaluated in experimental models in rodents that simulated this disease in human gastric mucosa. RESULTS BI did not exert gastroprotective effect, in contrast to HE (500mg/kg, p.o.) that decreased (p<0.05) the severity of gastric damage induced by HCl/ethanol (52%), indomethacin/bethanechol (51%), stress (52%) or pylorus ligature experiments (54%). HE increased (p<0.05) the pH and decreased acid output of gastric juice. This extract promoted increase of mucus amount (3.62mg/wt. tissue vs. 5.81mg/wt. tissue), healing action (67%) and displayed anti-Helicobacter pylori effect. CONCLUSIONS The antiulcer action of Hancornia speciosa resulted in increase of gastric mucus formation and antioxidant properties of polymeric proanthocyanidins present in the bark composition of this medicinal plant.
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Affiliation(s)
- Thiago de Mello Moraes
- Physiology Department, Biosciences Institute, São Paulo State University-UNESP, Botucatu, SP, Brazil
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Shih CD, Kuo DH, Huang CW, Gu YH, Chen FA. Autonomic nervous system mediates the cardiovascular effects of Rhodiola sacra radix in rats. JOURNAL OF ETHNOPHARMACOLOGY 2008; 119:284-290. [PMID: 18692558 DOI: 10.1016/j.jep.2008.07.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2007] [Revised: 06/03/2008] [Accepted: 07/13/2008] [Indexed: 05/26/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Rhodiola sacra (Crassulaceae) exhibits cardiovascular bioactivities and is used in Tibetan medicine for promoting circulation and preventing hypertension. However, the underlying mechanisms of its cardiovascular effects are poorly understood. AIM OF THE STUDY The aim of this study was therefore to evaluate the cardiovascular activity of water-soluble fraction (WtF) and n-butanol-soluble fraction (BtF) of Rhodiola sacra radix and to explore its mechanism of action in propofol anesthetized Sprague-Dawley rats. MATERIALS AND METHODS The changes of blood pressure, heart rate and cardiac contractility after systemic administration of the extracts (10-75 mg/kg) were examined for at least 40 min. Different antagonists were used to evaluate the mechanisms of cardiovascular effects of the extracts. RESULTS Intravenous injection of the WtF (10, 25, 35, 50 or 75 mg/kg) exhibited dose-dependent hypotension and increases in heart rate and cardiac contractility. In contrast, mild alterations in the same cardiovascular parameters were detected only at high dose (75 mg/kg) BtF. The WtF-induced hypotensive, positive inotropic and chronotropic effects were significantly abolished by pretreatment with hexamethonium (30 mg/kg, i.v.) or reserpine (5 mg/kg, i.v.), whereas the hypotensive, but not the positive inotropic or chronotropic effect was potentiated by captopril (2.5 mg/kg, i.v.). Pretreatment with methylatropine (1 mg/kg, i.v.), on the other hand, reversed the positive inotropic and chronotropic but not the hypotensive effects of WtF. The WtF-induced cardiovascular responses were not affected in rats pretreated with N(G)-nitro-l-arginine methyl ester (20 mg/kg, i.v.). CONCLUSIONS We conclude that systemic administration of the WtF of Rhodiola sacra radix elicited a potent hypotensive effect that was mediated by the withdrawal of sympathetic vasomotor tone and interaction with the circulatory angiotensin system. The positive inotropic and chronotropic effects of WtF may result from a direct vagal inhibition on the heart.
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Affiliation(s)
- Cheng-Dean Shih
- Department of Pharmacy and Graduate Institute of Pharmaceutical Technology, Tajen University, 20 Weishin Road, Yanpu Township, Pingtung County 90741, Taiwan.
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Ferreira HC, Serra CP, Endringer DC, Lemos VS, Braga FC, Cortes SF. Endothelium-dependent vasodilation induced by Hancornia speciosa in rat superior mesenteric artery. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2007; 14:473-8. [PMID: 17174539 DOI: 10.1016/j.phymed.2006.11.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The vasodilator effect of the ethanolic extract of leaves from Hancornia speciosa Gomes (HSE) was evaluated in superior mesenteric artery rings. HSE produced a concentration-dependent vasodilation (IC50 = 10.8 +/- 4.0 microg/mL) in arterial rings pre-contracted with phenylephrine, which was completely abolished in endothelium-denuded vessels. Endothelium-dependent vasodilation induced by HSE was strongly reduced by L-NAME (100 microM), a nitric oxide (NO) synthase inhibitor, but neither by atropine, a muscarinic receptor antagonist (1 microM), nor by indomethacin (10 microM), a cyclooxygenase inhibitor. In rings pre-contracted with 80 mM KCl, the vasodilator effect of HSE was shifted to the right and was completely abolished in the presence of L-NAME (100 microM). Similar effects were obtained in mesenteric rings pre-contracted with phenylephrine in the presence of KCl 25 mM alone or in addition to 100 microM L-NAME. In addition, BaCl2 (1 mM) dramatically reduced the vasodilation induced by HSE. Together, these findings led us to conclude that HSE induces an endothelium-dependent vasodilation in rat mesenteric artery, by a mechanism dependent on NO, on the activation of potassium channels and endothelium-derived hyperpolarizing factor release. Rutin, identified as a major peak in the HPLC fingerprint obtained for HSE, might contribute for the observed vasodilator effect, since it was able to induce an endothelium-dependent vasodilation in rat superior mesenteric arteries.
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Affiliation(s)
- H C Ferreira
- Departamento de Farmacologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antonio Carlos, CEP 31270-901 Belo Horizonte, Brazil
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Braga FC, Serra CP, Viana NS, Oliveira AB, Côrtes SF, Lombardi JA. Angiotensin-converting enzyme inhibition by Brazilian plants. Fitoterapia 2007; 78:353-8. [PMID: 17513067 DOI: 10.1016/j.fitote.2007.02.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2006] [Accepted: 02/01/2007] [Indexed: 11/25/2022]
Abstract
The potential antihypertensive activity of Brazilian plants was evaluated in vitro by its ability to inhibit the angiotensin-converting enzyme (ACE). Forty-four plants belonging to 30 families were investigated. Plants were selected based on their popular use as antihypertensive and/or diuretics. The following plants presented significant ACE inhibition rates: Calophyllum brasiliense, Combretum fruticosum, Leea rubra, Phoenix roebelinii and Terminalia catappa.
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Affiliation(s)
- Fernão C Braga
- Faculdade de Farmácia, Universidade Federal de Minas Gerais, Av. Antônio Carlos, Belo Horizonte, Brazil.
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Ferreira HC, Serra CP, Lemos VS, Braga FC, Cortes SF. Nitric oxide-dependent vasodilatation by ethanolic extract of Hancornia speciosa via phosphatidyl-inositol 3-kinase. JOURNAL OF ETHNOPHARMACOLOGY 2007; 109:161-4. [PMID: 16890389 DOI: 10.1016/j.jep.2006.06.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2005] [Revised: 03/16/2006] [Accepted: 06/23/2006] [Indexed: 05/11/2023]
Abstract
The vasodilator effect of the ethanolic extract of leaves from Hancornia speciosa Gomes (HSE) was studied in rat aortic rings. HSE produced a concentration-dependent vasodilatation (pIC(50)=5.6+/-0.1), which was completely abolished in endothelium-denuded vessels. The endothelium-dependent vasodilatation induced by HSE was abolished by l-NAME (100 microM), a nitric oxide (NO) synthase inhibitor, but not atropine (1 microM; pIC(50)=5.6+/-0.2), a muscarinic receptor antagonist, nor indomethacin (10 microM; pIC(50)=5.4+/-0.2), a cyclooxygenase inhibitor. The concentration-response curve of HSE was significantly shifted to the left by superoxide dismutase (SOD; 300U/mL). In addition, while SOD displaced the 3-morpholino-sidnonimine (SIN-1; P<0.05) concentration-effect curve to the left, HSE (50 microg/mL) had no effect. Finally, wortmannin (0.3 microM), an inhibitor of phosphatidyl-inositol 3-kinase (PI3K), dramatically reduced the vasodilator effect of HSE. Together, these findings lead us to conclude that HSE induces a NO- and endothelium-dependent vasodilatation in rat aortic preparations, likely by a mechanism dependent on the activation of PI3K.
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Affiliation(s)
- Herick C Ferreira
- Departamento de Farmacologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antonio Carlos 6627, 31270-901 Belo Horizonte, Brazil
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