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Anti-inflammatory activity of the functional groups present in Hippophae rhamnoides (Seabuckthorn) leaf extract. Inflammopharmacology 2017; 26:291-301. [PMID: 28409391 DOI: 10.1007/s10787-017-0345-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 03/27/2017] [Indexed: 10/19/2022]
Abstract
ETHNO PHARMACOLOGICAL RELEVANCE The study explores the anti-inflammatory activity of components present in fractions obtained from leaves of Hippophae rhamnoides in mouse peritoneal macrophages. AIM OF THE STUDY Immunomodulators salvage the immune response by enhancing or reducing its capacity to the required level. Plant extracts are extensively used as immunomodulators because of their easy availability, simple methods of preparation and minimum side effects with maximum efficacy. MATERIALS AND METHODS The present study was conducted to assess the immunomodulatory activities of phyto constituents present in Seabuckthorn leaves. The aqueous-alcoholic leaf extract was subjected to successive and parallel extraction in the presence of polar and non-polar solvents for fractionation of compounds. Based on the yield, three fractions were selected viz. parallel methanol (PM), successive chloroform (SC) and successive methanol (SM) and screened for in vitro immunomodulatory activities. Peritoneal macrophages were isolated from Balb/c mice and cultured with or without LPS to evaluate the immunomodulatory effect of the three fractions on cell viability, hemolytic activity, nitric oxide (NO) production, cytokine levels, iNOS and COX-2 expressions. RESULTS The results revealed that none of the three fractions induced hemolysis. Cells treated with PM fraction significantly suppressed LPS-induced NO production and pro-inflammatory cytokines such as TNF-α, IL-6 and IFN-γ as compared to SC and SM treatment. The iNOS and COX-2 expressions were also significantly reduced after treatment with PM fraction. CONCLUSIONS The decrease in LPS-induced NO production, pro-inflammatory cytokine secretion, iNOS and COX-2 expression signifies anti-inflammatory properties of PM fraction containing tannins, proteins and carbohydrate groups. Hence, this plant-derived immunomodulator can be used as a therapeutic agent in inflammatory diseases.
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202
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Ho GTT, Kase ET, Wangensteen H, Barsett H. Phenolic Elderberry Extracts, Anthocyanins, Procyanidins, and Metabolites Influence Glucose and Fatty Acid Uptake in Human Skeletal Muscle Cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:2677-2685. [PMID: 28303711 DOI: 10.1021/acs.jafc.6b05582] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Uptake of glucose and fatty acids in skeletal muscle is of interest for type 2 diabetes treatment. The aim was to study glucose and fatty acid uptake in skeletal muscle cells, antioxidant effects, and inhibition of carbohydrate-hydrolyzing enzymes by elderberries. Enhanced glucose and oleic acid uptake in human skeletal muscle cells were observed after treatment with phenolic elderberry extracts, anthocyanins, procyanidins, and their metabolites. The 96% EtOH and the acidified MeOH extracts were highly active. Of the isolated substances, cyanidin-3-glucoside and cyanidin-3-sambubioside showed highest stimulation of uptake. Phloroglucinol aldehyde was most active among the metabolites. Isolated anthocyanins and procyanidins are strong radical scavengers and are good inhibitors of 15-lipoxygenase and moderate inhibitors of xanthine oxidase. As α-amylase and α-glucosidase inhibitors, they are considerably better than the positive control acarbose. The antidiabetic property of elderberry phenolics increases the nutritional value of this plant and indicates potential as functional food against diabetes.
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Affiliation(s)
- Giang Thanh Thi Ho
- Department of Pharmaceutical Chemistry, School of Pharmacy, University of Oslo , P.O. Box 1068, Blindern, 0316 Oslo, Norway
| | - Eili Tranheim Kase
- Department of Pharmaceutical Biosciences, School of Pharmacy, University of Oslo , P.O. Box 1068, Blindern, 0316 Oslo, Norway
| | - Helle Wangensteen
- Department of Pharmaceutical Chemistry, School of Pharmacy, University of Oslo , P.O. Box 1068, Blindern, 0316 Oslo, Norway
| | - Hilde Barsett
- Department of Pharmaceutical Chemistry, School of Pharmacy, University of Oslo , P.O. Box 1068, Blindern, 0316 Oslo, Norway
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203
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Kazeem MI, Ashafa AOT. Kinetics of inhibition of carbohydrate-metabolizing enzymes and mitigation of oxidative stress by Eucomis humilis Baker bulb. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2017. [DOI: 10.1016/j.bjbas.2017.01.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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204
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Gammoh S, Alu’datt MH, Alhamad MN, Rababah T, Ereifej K, Almajwal A, Ammari ZA, Al Khateeb W, Hussein NM. Characterization of phenolic compounds extracted from wheat protein fractions using high-performance liquid chromatography/liquid chromatography mass spectrometry in relation to anti-allergenic, anti-oxidant, anti-hypertension, and anti-diabetic properties. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2017. [DOI: 10.1080/10942912.2016.1238832] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Sana Gammoh
- Department of Nutrition and Food Technology, Faculty of Agriculture, Jordan University of Science and Technology, Irbid, Jordan
| | - Muhammad H. Alu’datt
- Department of Nutrition and Food Technology, Faculty of Agriculture, Jordan University of Science and Technology, Irbid, Jordan
| | - Mohammad N. Alhamad
- Faculty of Agriculture, Jordan University of Science and Technology, Irbid, Jordan
| | - Taha Rababah
- Department of Nutrition and Food Technology, Faculty of Agriculture, Jordan University of Science and Technology, Irbid, Jordan
| | - Khalil Ereifej
- Department of Nutrition and Food Technology, Faculty of Agriculture, Jordan University of Science and Technology, Irbid, Jordan
| | - Ali Almajwal
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Zaid A. Ammari
- Department of Medicine, University of Toledo Medical Center, Toledo, OH, USA
| | - Wesam Al Khateeb
- Department of Biological Sciences, Yarmouk University, Irbid, Jordan
| | - Neveen M. Hussein
- Department of Nutrition and Food Technology, Faculty of Agriculture, Jordan University of Science and Technology, Irbid, Jordan
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205
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Pulbutr P, Saweeram N, Ittisan T, Intrama H, Jaruchotik A, Cushnie B. In vitro α-amylase and α-glucosidase Inhibitory Activities of Coccinia grandis Aqueous Leaf and Stem Extracts. ACTA ACUST UNITED AC 2017. [DOI: 10.3923/jbs.2017.61.68] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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206
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Shen Y, Xu Z, Sheng Z. Ability of resveratrol to inhibit advanced glycation end product formation and carbohydrate-hydrolyzing enzyme activity, and to conjugate methylglyoxal. Food Chem 2017; 216:153-60. [DOI: 10.1016/j.foodchem.2016.08.034] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 06/11/2016] [Accepted: 08/11/2016] [Indexed: 02/06/2023]
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207
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Kwape TE, Majinda RR, Chaturvedi P. Antioxidant and antidiabetic potential of Myrothamnus flabellifolius found in Botswana. ACTA ACUST UNITED AC 2017. [DOI: 10.1080/23312025.2016.1275403] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Tebogo E. Kwape
- Department of Biological Sciences, University of Botswana, P/bag 0027, Gaborone, Botswana
| | - Runner R.T. Majinda
- Department of Cheministry, University of Botswana, P/bag 0027, Gaborone, Botswana
| | - Padmaja Chaturvedi
- Department of Biological Sciences, University of Botswana, P/bag 0027, Gaborone, Botswana
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208
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Pournaderi PS, Yaghmaei P, Khodaei H, Noormohammadi Z, Hejazi SH. The effects of 6-Gingerol on reproductive improvement, liver functioning and Cyclooxygenase-2 gene expression in estradiol valerate - Induced polycystic ovary syndrome in Wistar rats. Biochem Biophys Res Commun 2017; 484:461-466. [PMID: 28093231 DOI: 10.1016/j.bbrc.2017.01.057] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Accepted: 01/12/2017] [Indexed: 12/14/2022]
Abstract
6-Gingerol is the major pungent ingredient of ginger with anti-inflammatory and antioxidant properties. In this study, we evaluate the effects of 6-gingerol on the biochemical parameters and ovarian histological improvements in estradiol valerate (EV) induced PCOS rats. Thirty six female Wistar rats were divided into 4 groups: control, received normal diet, PCOS control, received 4 mg/kg EV injection for 28 days and two experimental groups, received an EV injection for 28 days and followed by 6-gingerol (200 μg/kg and 400 μg/kg) for 14 days. The administration of EV led to increase body and ovarian weights, abnormality in serum sex steroid profile, decrease in antioxidant activity and increase in COX-2 gene expression. 6-gingerol treatments, particularly the 400 μg/kg dose, markedly attenuated these alterations. 6-gingerol showed beneficial effects in the EV induced PCOS rats via decreased expression of COX-2, restored biochemical parameters to normal and decreased of cysts in the ovaries.
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Affiliation(s)
| | - Parichehreh Yaghmaei
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran.
| | - Hamidreza Khodaei
- Department of Animal Sciences, Islamic Azad University, Golpayegan Branch, Isfahan, Iran
| | - Zahra Noormohammadi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Seyed Hossein Hejazi
- Skin Disease and Leishmaniasis Research Center, Department of Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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209
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Jemaa HB, Jemia AB, Khlifi S, Ahmed HB, Slama FB, Benzarti A, Elati J, Aouidet A. ANTIOXIDANT ACTIVITY AND A-AMYLASE INHIBITORY POTENTIAL OF ROSA CANINA L. AFRICAN JOURNAL OF TRADITIONAL, COMPLEMENTARY, AND ALTERNATIVE MEDICINES : AJTCAM 2017; 14:1-8. [PMID: 28573216 PMCID: PMC5446433 DOI: 10.21010/ajtcam.v14i2.1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Diabetes mellitus is one of the most common endocrinal disorders and medicinal plants continue to play an important role in the management of this disease. In this study, Rosa canina was investigated for the antioxidant and α-amylase inhibition activities. MATERIALS AND METHODS Methanolic extract of Rosa canina was investigated for its potential antioxidant activity. The extracts' total phenolic and flavonoid contents and scavenging capacity for free radicals were evaluated. The α-amylase inhibition assay was also carried. RESULTS Rosa canina extract exhibits a total Phenolic and flavonoid levels respectively (21.918 mg GAE/g and 2.647mg ER/g). The free radical scavenging activity was found to be prominent against DPPH with an IC50 of 0.668 mg/ml and against ABTS with an IC50 of 0.467 mg/ml. Extract showed a significant ferric ion reducing activities with an IC50 of4.962 mg/ml. CONCLUSION Rosa canina exerted a higher inhibitory activity against α-amylase. The obtained results support the antidiabetic use of rosa canina.
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Affiliation(s)
- Houda Ben Jemaa
- Research Unit on Nutrition, Regulation of Metabolic Systems and Atherosclerosis, High School of Sciences and Technology of Health of Tunis, 176 Bab Souika, BP1006, Tunis, Tunisia
| | - Amani Ben Jemia
- Research Unit on Nutrition, Regulation of Metabolic Systems and Atherosclerosis, High School of Sciences and Technology of Health of Tunis, 176 Bab Souika, BP1006, Tunis, Tunisia
| | - Sarra Khlifi
- Research Unit on Nutrition, Regulation of Metabolic Systems and Atherosclerosis, High School of Sciences and Technology of Health of Tunis, 176 Bab Souika, BP1006, Tunis, Tunisia
| | - Halima Ben Ahmed
- Research Unit on Nutrition, Regulation of Metabolic Systems and Atherosclerosis, High School of Sciences and Technology of Health of Tunis, 176 Bab Souika, BP1006, Tunis, Tunisia
| | - Fethi Ben Slama
- Research Unit on Nutrition, Regulation of Metabolic Systems and Atherosclerosis, High School of Sciences and Technology of Health of Tunis, 176 Bab Souika, BP1006, Tunis, Tunisia
| | - Anis Benzarti
- Research Unit on Nutrition, Regulation of Metabolic Systems and Atherosclerosis, High School of Sciences and Technology of Health of Tunis, 176 Bab Souika, BP1006, Tunis, Tunisia
| | - Jalila Elati
- Laboratory SURVEN, National Institute of Nutrition and Food Technology of Tunis, Tunisia
| | - Abdallah Aouidet
- Research Unit on Nutrition, Regulation of Metabolic Systems and Atherosclerosis, High School of Sciences and Technology of Health of Tunis, 176 Bab Souika, BP1006, Tunis, Tunisia
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210
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Ho GTT, Kase ET, Wangensteen H, Barsett H. Effect of Phenolic Compounds from Elderflowers on Glucose- and Fatty Acid Uptake in Human Myotubes and HepG2-Cells. Molecules 2017; 22:E90. [PMID: 28067838 PMCID: PMC6155811 DOI: 10.3390/molecules22010090] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 12/19/2016] [Accepted: 12/29/2016] [Indexed: 11/29/2022] Open
Abstract
Type 2 diabetes (T2D) is manifested by progressive metabolic impairments in tissues such as skeletal muscle and liver, and these tissues become less responsive to insulin, leading to hyperglycemia. In the present study, stimulation of glucose and oleic acid uptake by elderflower extracts, constituents and metabolites were tested in vitro using the HepG2 hepatocellular liver carcinoma cell line and human skeletal muscle cells. Among the crude extracts, the 96% EtOH extract showed the highest increase in glucose and oleic acid uptake in human skeletal muscle cells and HepG2-cells. The flavonoids and phenolic acids contained therein were potent stimulators of glucose and fatty acid uptake in a dose-dependent manner. Most of the phenolic constituents and several of the metabolites showed high antioxidant activity and showed considerably higher α-amylase and α-glucosidase inhibition than acarbose. Elderflower might therefore be valuable as a functional food against diabetes.
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Affiliation(s)
- Giang Thanh Thi Ho
- Department of Pharmaceutical Chemistry, School of Pharmacy, University of Oslo, P.O. Box 1068 Blindern, 0316 Oslo, Norway.
| | - Eili Tranheim Kase
- Department of Pharmaceutical Biosciences, School of Pharmacy, University of Oslo, P.O. Box 1068 Blindern, 0316 Oslo, Norway.
| | - Helle Wangensteen
- Department of Pharmaceutical Chemistry, School of Pharmacy, University of Oslo, P.O. Box 1068 Blindern, 0316 Oslo, Norway.
| | - Hilde Barsett
- Department of Pharmaceutical Chemistry, School of Pharmacy, University of Oslo, P.O. Box 1068 Blindern, 0316 Oslo, Norway.
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211
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Ezeani C, Ezenyi I, Okoye T, Okoli C. Ocimum basilicum extract exhibits antidiabetic effects via inhibition of hepatic glucose mobilization and carbohydrate metabolizing enzymes. JOURNAL OF COMPLEMENTARY MEDICINE RESEARCH 2017; 6:22-28. [PMID: 28163956 PMCID: PMC5289084 DOI: 10.5455/jice.20161229054825] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Indexed: 12/25/2022]
Abstract
Aim: Ocimum basilicum L (Lamiaceae) is used as a traditional remedy for different ailments, including diabetes mellitus. This study investigated the antidiabetic effects of an extract of aerial parts of O. basilicum. Methods: Antihyperglycemic effect of the extract was determined by its effects on α-amylase and α-glucosidase in vitro, while antidiabetic properties were studied in alloxan induced diabetic rats treated for 28 days with extract and compared to those treated with oral metformin (150 mg/kg). The study and analysis was conducted between 2014 and 2015. Results: The treatment with 100 and 200 mg/kg extract significantly (P < 0.05) reduced fasting blood glucose concentration and slightly increased mean body weight in treated groups. Oral glucose tolerance was also significantly (P < 0.05, 0.001) improved in 100 and 400 mg/kg extract-treated groups. The extract caused a dose-dependent increase in liver glycogen content, while it decreased alanine transferase (18.9-30.56%) and aspartate transferase (6.48-34.3%) levels in a non-dose-dependent manner. A dose of 100 mg/kg also reduced serum cholesterol and triglycerides by 19.3 and 39.54%, compared to a 2.6% reduction of cholesterol seen in the metformin-treated group. The extract was observed to produce significant (P < 0.001) concentration-dependent inhibition of α-glucosidase (35.71-100%) and also α-amylase (23.55-81.52%), with estimated inhibitory concentration values of 1.62 and 3.86 mg/mL, respectively. Conclusions: The antidiabetic properties of the extract may be due to its ability to suppress endogenous glucose release, inhibit glycogenolysis and/or stimulate glycogenesis.
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Affiliation(s)
- Chinelo Ezeani
- Department of Pharmacology & Toxicology, Faculty of Pharmaceutical Sciences, University of Nigeria, Nsukka 410001, Enugu State, Nigeria
| | - Ifeoma Ezenyi
- Department of Pharmacology and Toxicology, NIPRD, Abuja, Nigeria
| | - Theophine Okoye
- Department of Pharmacology & Toxicology, Faculty of Pharmaceutical Sciences, University of Nigeria, Nsukka 410001, Enugu State, Nigeria
| | - Charles Okoli
- Department of Pharmacology & Toxicology, Faculty of Pharmaceutical Sciences, University of Nigeria, Nsukka 410001, Enugu State, Nigeria
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212
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Alpha-glucosidase inhibition and antihyperglycemic activity of flavonoids rich fractions of Rosmarinus officinalis in normal and streptozotocin diabetic mice. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/s13596-016-0252-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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213
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Behl T, Kotwani A. Proposed mechanisms of Terminalia catappa in hyperglycaemia and associated diabetic complications. J Pharm Pharmacol 2016; 69:123-134. [DOI: 10.1111/jphp.12676] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 11/12/2016] [Indexed: 12/30/2022]
Abstract
Abstract
Objectives
Terminalia catappa has shown potent antidiabetic activity in the past; however, the exact molecular mechanisms by which it acts have not been elucidated. This review aims at exploring several hypotheses which have been proposed to explain its mechanism of action, including reduction in oxidative stress, inflammation, angiogenesis, lipid profile correction and direct hypoglycaemic actions.
Methods
A thorough review of all the articles, research as well as reviews, available regarding the concerned topic was performed. MEDLINE databases were searched using keywords (and their combinations), such as T. catappa, renin oxidative stress, inflammation, angiogenesis, diabetic retinopathy, α-glucosidase and α-amylase, among several others. English-language articles were preferably selected.
Key findings
Apart from metabolic dysfunctions, several hyperglycaemia-induced pathological conditions come into scene as the after-effects of diabetes. These mainly include inflammation, oxidative stress, angiogenesis and lipid profile alteration, which ultimately result in vascular endothelial dysfunction, hepatic steatosis, lipid peroxidation and apoptosis of endothelial, hepatic and neuronal cells. Terminalia catappa effectively attenuates the progression of diabetic retinopathy and shows significant hypoglycaemic actions. The mechanisms behind these effects were explained.
Conclusion
Terminalia catappa may provide an effective natural product to treat hyperglycaemia and prevent subsequent diabetic complications.
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Affiliation(s)
- Tapan Behl
- Department of Pharmacology, Vallabhbhai Patel Chest Institute, University of Delhi, New Delhi, India
| | - Anita Kotwani
- Department of Pharmacology, Vallabhbhai Patel Chest Institute, University of Delhi, New Delhi, India
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214
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Utilization of the supercritical carbon dioxide extraction technology for the production of deoiled palm kernel cake. J CO2 UTIL 2016. [DOI: 10.1016/j.jcou.2016.06.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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215
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Abid OUR, Ayaz M, Rehman W, Mehdi K, Ali A, Wadood A, Rahim F, Sultan A, Ghufran M, Mir S, Qureshi MT. Synthesis, Enzyme Inhibition, and Molecular Docking Studies of Hydrazones from Dichlorophenylacetic Acids. J CHIN CHEM SOC-TAIP 2016. [DOI: 10.1002/jccs.201600163] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Muhammad Ayaz
- Department of Chemistry; Hazara University; Mansehra 21120 Pakistan
| | - Wajid Rehman
- Department of Chemistry; Hazara University; Mansehra 21120 Pakistan
| | - Kamran Mehdi
- Department of Chemistry; Hazara University; Mansehra 21120 Pakistan
| | - Arif Ali
- Department of Chemistry; Hazara University; Mansehra 21120 Pakistan
| | - Abdul Wadood
- Department of Biochemistry; Abdul Wali Khan University Mardan; Mardan 23200 Pakistan
| | - Fazal Rahim
- Department of Chemistry; Hazara University; Mansehra 21120 Pakistan
| | - Aneesa Sultan
- Department of Biochemistry; Quaid-i-Azam University; Islamabad 45320 Pakistan
| | - Mehreen Ghufran
- Department of Biochemistry; Abdul Wali Khan University Mardan; Mardan 23200 Pakistan
| | - Sadullah Mir
- Department of Chemistry; COMSATS Institute of Information Technology; Abbottabad 22060 Pakistan
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216
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Sompong W, Muangngam N, Kongpatpharnich A, Manacharoenlarp C, Amorworasin C, Suantawee T, Thilavech T, Adisakwattana S. The inhibitory activity of herbal medicines on the keys enzymes and steps related to carbohydrate and lipid digestion. Altern Ther Health Med 2016; 16:439. [PMID: 27814716 PMCID: PMC5097378 DOI: 10.1186/s12906-016-1424-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 10/18/2016] [Indexed: 01/11/2023]
Abstract
BACKGROUND Obesity and overweight are consistently associated with metabolic disorders including hyperglycemia and hyperlipidemia. Herbal medicines have been currently suggested as an alternative source of potentially useful antihyperglycemic, antihyperlipidemic, antioxidant activities. The objective of this study was to assess the in vitro inhibitory effects of eleven herbal medicines on carbohydrate and lipid digestive enzymes and the key steps of lipid digestion including the inhibition of micelle formation and the ability to bind bile acid. In addition, antioxidant activity of herbal medicines was also investigated. METHODS α-Glucosidase, pancreatic α-amylase, pancreatic lipase, and pancreatic cholesterol esterase inhibitory activities of aqueous extract of herbal medicines were measured using the enzymatic colorimetric assay. The formation of cholesterol micelles was determined using the cholesterol assay kit. The bile acid binding was measured using the colorimetric assay. Antioxidant activities were assessed by using four methods including Trolox equivalent antioxidant capacity (TEAC), oxygen radical absorbance capacity ORAC), superoxide radical scavenging activity (SRSA), and hydroxyl radical scavenging activity (HRSA). RESULTS The extracts (1 mg/mL) markedly inhibited intestinal maltase (5.16 - 44.33 %), sucrase (1.25-45.86 %), pancreatic α-amylase (1.75-12.53 %), pancreatic lipase (21.42-85.93 %), and pancreatic cholesterol esterase (2.92-53.35 %). The results showed that all extracts exhibited the inhibitory activity against pancreatic lipase with the IC50 values ranging from 0.015 to 4.259 mg/mL. In addition, the incorporation of cholesterol into micelles was inhibited by the extracts (6.64-33.74 %). The extracts also bound glycodeoxycholic acid (9.9-15.08 %), taurodeoxycholic acid (12.55-18.18 %), and taurocholic acid (11.91 - 18.4 %). Furthermore, the extracts possessed various antioxidant activities including the TEAC values (0.50 - 4.70 μmol trolox/mg dried extract), the ORAC values (9.14-44.41 μmol trolox/mg dried extract), the SRSA (0.31 - 18.82 mg trolox/mg dried extract), and the HRSA (0.05-2.29 mg trolox/mg dried extract). The findings indicated that Syzygium aromaticum, Phyllanthus amarus, Thunbergia laurifolia were the effective promising antihyperglycemic and antihyperlipidemic agents. Statistical analysis demonstrated strong positive significant correlations between the contents of phenolic compounds and % inhibition of pancreatic lipase (r = 0.885, p < 0.001), % inhibition of pancreatic cholesterol esterase (r = 0.761, p < 0.001), and the TEAC value (r = 0.840, p < 0.001). Furthermore, there was a strongly positive correlation between the TEAC value and % inhibition of pancreatic cholesterol esterase (r = 0.851, p < 0.001) and % inhibition of pancreatic lipase (r = 0.755, p < 0.001). CONCLUSIONS Three herbal medicines including Syzygium aromaticum, Thunbergia laurifolia, and Phyllanthus amarus markedly inhibited the intestinal α-glucosidase, pancreatic α-amylase, pancreatic lipase, and pancreatic cholesterol esterase. They also reduced formation of cholesterol micelle and bound bile acid. The findings indicate that these herbal medicines might be a promising agent for antihyperglycemic, antihyperlipidemic, and antioxidant activities.
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217
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Jan F, Kumar S, Jha R. Effect of boiling on the antidiabetic property of enzyme treated sheep milk casein. Vet World 2016; 9:1152-1156. [PMID: 27847428 PMCID: PMC5104727 DOI: 10.14202/vetworld.2016.1152-1156] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 09/10/2016] [Indexed: 12/11/2022] Open
Abstract
Aim: Sheep milk-born bioactive peptides have been found to exhibit various physiological activities. The present work was designed with the aim to evaluate the effect of boiling on antidiabetic property of peptides derived from sheep milk caseinate on hydrolysis with three different proteases. Materials and Methods: In this investigation, casein prepared from raw and boiled sheep milk was hydrolyzed by three commercially available proteases (trypsin, pepsin, and chymotrypsin). These hydrolysates collected at different hydrolysis times (60, 120, 160, and 240 min) were assayed for their antidiabetic activity. Results: Among the three different enzyme hydrolysates, casein treated with chymotrypsin shows the highest antidiabetic activity among other enzymes. While the antidiabetic effect of raw milk-derived casein hydrolysates always exceeds than effect shown by boiled milk casein hydrolysates. Conclusion: The result obtained hence shows that the effect of boiling on the properties of bioactive peptides released during different enzyme digestion depends largely on the enzymatic formulation used and treatment conditions. Chymotrypsin treatment of raw casein yields peptides with maximum antidiabetic activity as compared to pepsin and trypsin. Moreover, the peptides produced after enzymatic treatment of boiled casein show reduced antidiabetic properties. Therefore, enzymatically treated raw milk casein hydrolysates may be used as effective nutritional supplements for diabetic patients, as it causes a significant inhibition of α-amylase activity.
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Affiliation(s)
- Farhath Jan
- Department of Biochemistry, Dolphin PG Institute of Biomedical & Natural Sciences, Dehradun, Uttarakhand, India
| | - Santosh Kumar
- Department of Biotechnology, Uttranchal University, Dehradun, Uttarakhand, India
| | - Richa Jha
- Department of Biotechnology, Uttranchal University, Dehradun, Uttarakhand, India
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218
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A review on promising phytochemical, nutritional and glycemic control studies on Moringa oleifera Lam. in tropical and sub-tropical regions. Asian Pac J Trop Biomed 2016. [DOI: 10.1016/j.apjtb.2016.08.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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219
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Lyu H, Chen J, Li WL. Natural Triterpenoids for the Treatment of Diabetes Mellitus: A Review. Nat Prod Commun 2016. [DOI: 10.1177/1934578x1601101037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Triterpenoids, an important group of secondary metabolites, are widely distributed in nature. Many triterpenoids have been found with potential therapeutic effect against diabetes mellitus. However, the use of triterpenoids for the treatment of diabetes has not been systematically discussed previously. This review summarized the anti-diabetic activity of natural triterpenoids reported since the late 1980s with the emphasis on the molecular mechanisms.
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Affiliation(s)
- Han Lyu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
| | - Jian Chen
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
| | - Wei-lin Li
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
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Selection and evaluation of functional characteristics of autochthonous lactic acid bacteria isolated from traditional fermented stinky bean (Sataw-Dong). ANN MICROBIOL 2016. [DOI: 10.1007/s13213-016-1233-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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221
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Metabolic and biochemical changes in streptozotocin induced obese-diabetic rats treated with Phyllanthus niruri extract. J Pharm Biomed Anal 2016; 128:302-312. [DOI: 10.1016/j.jpba.2016.06.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 05/31/2016] [Accepted: 06/03/2016] [Indexed: 01/10/2023]
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222
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Sheikh BY. The role of prophetic medicine in the management of diabetes mellitus: A review of literature. J Taibah Univ Med Sci 2016. [DOI: 10.1016/j.jtumed.2015.12.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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223
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Poovitha S, Parani M. In vitro and in vivo α-amylase and α-glucosidase inhibiting activities of the protein extracts from two varieties of bitter gourd (Momordica charantia L.). Altern Ther Health Med 2016; 16 Suppl 1:185. [PMID: 27454418 PMCID: PMC4959359 DOI: 10.1186/s12906-016-1085-1] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Background α-amylase and α-glucosidase digest the carbohydrates and increase the postprandial glucose level in diabetic patients. Inhibiting the activity of these two enzymes can control postprandial hyperglycemia, and reduce the risk of developing diabetes. Bitter gourd or balsam pear is one of the important medicinal plants used for controlling postprandial hyperglycemia in diabetes patients. However, there is limited information available on the presence of α-amylase and α-glucosidase inhibiting compounds. In the current study, the protein extracts from the fruits of M. charantia var. charantia (MCC) and M. charantia var. muricata (MCM) were tested for α-amylase and α-glucosidase inhibiting activities in vitro, and glucose lowering activity after oral administration in vivo. Results The protein extract from both MCC and MCM inhibited the activity of α-amylase and α-glucosidase through competitive inhibition, which was on par with Acarbose as indicated by in vitro percentage of inhibition (66 to 69 %) and IC50 (0.26 to 0.29 mg/ml). Both the protein extracts significantly reduced peak blood glucose and area under the curve in Streptozotocin-induced diabetic rats, which were orally challenged with starch and sucrose. Conclusions Protein extracts from the fruits of the two varieties of bitter gourd inhibited α-amylase and α-glucosidase in vitro and lowered the blood glucose level in vivo on par with Acarbose when orally administrated to Streptozotocin-induced diabetic rats. Further studies on mechanism of action and methods of safe and biologically active delivery will help to develop an anti-diabetic oral protein drug from these plants.
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Moein S, Jahanshai S, Rahimzadeh M, Moein M. Kinetic of α-Amylase and Comparison its Inhibition by Ethanol and Aqueous Extracts of Otostegia persica, Salvia mirzayanii and Zataria multiflora. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION A-SCIENCE 2016. [DOI: 10.1007/s40995-016-0043-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Trinh BTD, Staerk D, Jäger AK. Screening for potential α-glucosidase and α-amylase inhibitory constituents from selected Vietnamese plants used to treat type 2 diabetes. JOURNAL OF ETHNOPHARMACOLOGY 2016; 186:189-195. [PMID: 27041401 DOI: 10.1016/j.jep.2016.03.060] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 03/29/2016] [Accepted: 03/30/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The 18 plant species investigated in this study have been used as herbal antidiabetic remedies in Vietnamese traditional medicines. This study aimed to evaluate their ability to inhibit α-glucosidase and α-amylase, two key enzymes involved in serum glucose regulation. MATERIALS AND METHODS Chloroform, ethanol and water extracts of 18 plants were screened for α-glucosidase and α-amylase inhibitory activity. Analytical-scale HPLC was subsequently used to investigate the most active extracts, where samples with low level of tannins were identified and fractionated into 96-well microplates, followed by α-glucosidase and α-amylase assessment of each well. High-resolution α-glucosidase and α-amylase inhibition profiles constructed from these assays allowed identification of HPLC peaks correlated with α-glucosidase and α-amylase inhibitory activity. The active constituents were subsequently isolated using preparative-scale HPLC and their structure was elucidated by HR-ESIMS and NMR. RESULTS Ethanol extracts of Nepenthes mirabilis, Phyllanthus urinaria, and Kandelia candel significantly inhibited α-glucosidase with IC50 values of 32.7±6.3, 39.7±9.7, and 35.4±13.9μg/mL, respectively. Water extracts of N. mirabilis, Phyllanthus amarus, P. urinaria, Lagerstroemia speciosa, Syzygium cumini, Rhizophora mucronata, and K. candel showed IC50 values of 3.3±0.8, 34.9±1.5, 14.6±4.6, 5.4±0.5, 20.9±1.8, 3.3±0.6, and 4.0±0.8μg/mL, respectively. In the α-amylase inhibition assay, ethanol extracts of K. candel and Ficus racemosa showed IC50 of 7.6±0.9 and 46.7±23.6μg/mL, respectively. Showing low tannin constituents as seen from HPLC profiles, P. amarus and P. urinaria water extracts and F. racemosa ethanol extract were subjected to microfractionation. Only high-resolution α-glucosidase inhibition profiles of P. amarus and P. urinaria water extracts showed several active compounds, which were isolated and identified as corilagin (1), repandusinic acid A (2), and mallotinin (3). IC50 of these compounds were 1.70±0.03, 6.10±0.10, and 3.76±0.15μM, respectively. Kinetics analysis revealed that 1 displayed a mixed type mode of inhibition with Ki and Ki' values of 2.37±0.90 and 2.61±0.61μM, respectively, whereas 2 and 3 competitively inhibited α-glucosidase with Ki values of 4.01±0.47 and 0.65±0.11μM, respectively. CONCLUSION Corilagin (1), repandusinic acid A (2), and mallotinin (3) were potent α-glucosidase inhibitors contributing significantly to the inhibitory effect observed for the water extracts of P. amarus and P. urinaria.
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Affiliation(s)
- Binh T D Trinh
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Dan Staerk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Anna K Jäger
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark.
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Tahir HU, Sarfraz RA, Ashraf A, Adil S. Chemical Composition and Antidiabetic Activity of Essential Oils Obtained from Two Spices (Syzygium aromaticum and Cuminum cyminum). INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2016. [DOI: 10.1080/10942912.2015.1110166] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | - Raja Adil Sarfraz
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
- Central Hi-Tech Laboratory, University of Agriculture, Faisalabad, Pakistan
| | - Aisha Ashraf
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
- Department of Chemistry, Government College Women University, Faisalabad, Pakistan
| | - Shazia Adil
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
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Hajizadeh-Sharafabad F, Alizadeh M, Mohammadzadeh MHS, Alizadeh-Salteh S, Kheirouri S. Effect of Gundelia tournefortii L. extract on lipid profile and TAC in patients with coronary artery disease: A double-blind randomized placebo controlled clinical trial. J Herb Med 2016. [DOI: 10.1016/j.hermed.2016.02.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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228
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Ojo OA, Ojo AB, Ajiboye B, Olayide I, Fadaka A. Helianthus annuus Leaf Ameliorates Postprandial Hyperglycaemia by Inhibiting Carbohydrate Hydrolyzing Enzymes Associated with Type-2 Diabetes. IRANIAN JOURNAL OF TOXICOLOGY 2016. [DOI: 10.29252/arakmu.10.5.17] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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229
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Mehenni C, Atmani-Kilani D, Dumarçay S, Perrin D, Gérardin P, Atmani D. Hepatoprotective and antidiabetic effects of Pistacia lentiscus leaf and fruit extracts. J Food Drug Anal 2016; 24:653-669. [PMID: 28911573 PMCID: PMC9336671 DOI: 10.1016/j.jfda.2016.03.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 03/10/2016] [Accepted: 03/15/2016] [Indexed: 11/24/2022] Open
Abstract
Pistacia lentiscus (Anacardiaceae) is commonly used in folk medicine to treat various diseases. The aim of the present study was to evaluate the hepatoprotective and antioxidant activities of extracts of P. lentiscus leaves (PL) and fruits (PF) against experimentally induced liver damage. Furthermore, characterization of extracts was attempted by a spectroscopic methodology (Fourier transform infrared spectroscopy) and high-performance liquid chromatography with diode array detection analysis. A hepatoprotective potential against paracetamol [165 mg/kg body weight (b.w.)] toxicity was noticed in mice pretreated with the same dose of PL or PF extract (125 mg/kg b.w.) or a combination of both (PL/PF 63/63 mg/kg b.w.), as revealed by an analysis of biochemical parameters (alanine aminotransferase, aspartate aminotransferase, and alkaline phosphatase activities and total bilirubin). These results were confirmed by histological examination of the liver, which revealed significant protection against paracetamol-induced hepatic necrosis. Furthermore, PF extract exhibited a promising antidiabetic activity in streptozotocin-induced diabetic rats, similar to the reference drug glibenclamide (0.91 g/L), a result confirmed by in vitro inhibition of α-amylase. We demonstrated that the leaf crude extract showed the best effect in all tested methods, compared to its fruit counterpart, probably due to the presence of higher amounts of phenolic compounds, as determined by phytochemical and Fourier transform infrared spectroscopy analyses. Moreover, high-performance liquid chromatography with diode array detection led to the identification of six compounds for each part of the plant. Gallic acid, a characteristic compound of Pistacia species, was most abundant in leaves and fruits, while luteolin was detected for the first time in fruits. Obtained activities of P. lentiscus extracts may well be due, at least in part, to the presence of the above compounds.
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Affiliation(s)
- Chafiaâ Mehenni
- Laboratoire de Biochimie Appliquée, Faculté des Sciences de la Nature et de la Vie, Université de Bejaia, Bejaia 06000, Algeria
| | - Dina Atmani-Kilani
- Laboratoire de Biochimie Appliquée, Faculté des Sciences de la Nature et de la Vie, Université de Bejaia, Bejaia 06000, Algeria
| | - Stéphane Dumarçay
- Laboratoire d'Etudes et de Recherches sur le Matériau Bois - IFR 110, Nancy-Université, Faculté des Sciences et Techniques, Vandoeuvre-lès-Nancy, France
| | - Dominique Perrin
- Laboratoire d'Etudes et de Recherches sur le Matériau Bois - IFR 110, Nancy-Université, Faculté des Sciences et Techniques, Vandoeuvre-lès-Nancy, France
| | - Philippe Gérardin
- Laboratoire d'Etudes et de Recherches sur le Matériau Bois - IFR 110, Nancy-Université, Faculté des Sciences et Techniques, Vandoeuvre-lès-Nancy, France
| | - Djebbar Atmani
- Laboratoire de Biochimie Appliquée, Faculté des Sciences de la Nature et de la Vie, Université de Bejaia, Bejaia 06000, Algeria.
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Silva FSG, Oliveira PJ, Duarte MF. Oleanolic, Ursolic, and Betulinic Acids as Food Supplements or Pharmaceutical Agents for Type 2 Diabetes: Promise or Illusion? JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:2991-3008. [PMID: 27012451 DOI: 10.1021/acs.jafc.5b06021] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Oleanolic (OA), ursolic (UA), and betulinic (BA) acids are three triterpenic acids (TAs) with potential effects for treatment of type 2 diabetes (T2DM). Mechanistic studies showed that these TAs act as hypoglycemic and antiobesity agents mainly through (i) reducing the absorption of glucose; (ii) decreasing endogenous glucose production; (iii) increasing insulin sensitivity; (iv) improving lipid homeostasis; and (v) promoting body weight regulation. Besides these promising beneficial effects, it is believed that OA, UA, and BA protect against diabetes-related comorbidities due to their antiatherogenic, anti-inflammatory, and antioxidant properties. We also highlight the protective effect of OA, UA, and BA against oxidative damage, which may be very relevant for the treatment and/or prevention of T2DM. In the present review, we provide an integrative description of the antidiabetic properties of OA, UA, and BA, evaluating the potential use of these TAs as food supplements or pharmaceutical agents to prevent and/or treat T2DM.
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Affiliation(s)
- Filomena S G Silva
- Centro de Biotecnologia Agrı́cola e Agro-Alimentar do Alentejo (CEBAL)/Instituto Politécnico de Beja (IPBeja) , Apartado 6158, 7801-908 Beja, Portugal
| | - Paulo J Oliveira
- CNC, Center for Neuroscience and Cellular Biology, UC-Biotech Building, Biocant Park, University of Coimbra , 3060-107 Cantanhede, Portugal
| | - Maria F Duarte
- Centro de Biotecnologia Agrı́cola e Agro-Alimentar do Alentejo (CEBAL)/Instituto Politécnico de Beja (IPBeja) , Apartado 6158, 7801-908 Beja, Portugal
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Effect of Rol Genes on Polyphenols Biosynthesis in Artemisia annua and Their Effect on Antioxidant and Cytotoxic Potential of the Plant. Appl Biochem Biotechnol 2016; 179:1456-68. [DOI: 10.1007/s12010-016-2077-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 04/03/2016] [Indexed: 10/21/2022]
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Martínez-Abundis E, Mendez-del Villar M, Pérez-Rubio KG, Zuñiga LY, Cortez-Navarrete M, Ramírez-Rodriguez A, González-Ortiz M. Novel nutraceutic therapies for the treatment of metabolic syndrome. World J Diabetes 2016; 7:142-52. [PMID: 27076875 PMCID: PMC4824685 DOI: 10.4239/wjd.v7.i7.142] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 01/24/2016] [Accepted: 02/14/2016] [Indexed: 02/05/2023] Open
Abstract
Nutraceutic therapies such as berberine, bitter melon, Gymnema sylvestre, Irvingia gabonensis, resveratrol and ursolic acid have been shown to help control metabolic syndrome (MetS). The effect of berberine on glucose and lipid metabolism, hypertension, obesity and MetS has been evaluated in animal models and humans. Most clinical trials involving bitter melon have been conducted to evaluate its effect on glucose metabolism; nevertheless, some studies have reported favorable effects on lipids and blood pressure although there is little information about its effect on body weight. Gymnema sylvestre helps to decrease body weight and blood sugar levels; however, there is limited information on dyslipidemia and hypertension. Clinical trials of Irvingia gabonensis have shown important effects decreasing glucose and cholesterol concentrations as well decreasing body weight. Resveratrol acts through different mechanisms to decrease blood pressure, lipids, glucose and weight, showing its effects on the population with MetS. Finally, there is evidence of positive effects with ursolic acid in in vitro and in vivo studies on glucose and lipid metabolism and on body weight and visceral fat. Therefore, a review of the beneficial effects and limitations of the above-mentioned nutraceutic therapies is presented.
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In vitro inhibitory effects on α-glucosidase and α-amylase level and antioxidant potential of seeds of Phoenix dactylifera L. Asian Pac J Trop Biomed 2016. [DOI: 10.1016/j.apjtb.2015.11.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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234
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Olaokun OO, McGaw LJ, Janse van Rensburg I, Eloff JN, Naidoo V. Antidiabetic activity of the ethyl acetate fraction of Ficus lutea (Moraceae) leaf extract: comparison of an in vitro assay with an in vivo obese mouse model. Altern Ther Health Med 2016; 16:110. [PMID: 27029351 PMCID: PMC4815146 DOI: 10.1186/s12906-016-1087-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 03/19/2016] [Indexed: 11/29/2022]
Abstract
Background Ficus lutea crude acetone leaf extracts were previously shown to stimulate glucose uptake and insulin secretion of established cells and, inhibit α-amylase and α-glucosidase activities. Methods For this study, F. lutea acetone extracts were subjected to solvent-solvent fractionation to yield fractions with differing polarities (hexane, chloroform, dichloromethane, ethyl acetate, n-butanol and water) in an attempt to obtain a more potent fraction with in vitro and probably in vivo activity. Results Among these fractions, the ethyl acetate fraction had the highest total polyphenol content (100.5 ± 1.6 mg GAE/g dried extract) and α-glucosidase inhibitory activity (126.8 ± 30.6 μg/ml). It also stimulated the highest glucose uptake of C2C12 muscle cells and decreased extracellular glucose concentration of H-4-II-E liver cells with low cytotoxic activity. The ethyl acetate fraction (10.88 ± 0.55 μg/L at 250 μg/ml) enhanced insulin secretion in RIN-m5F pancreatic β-cells to the same degree as the positive control glibenclamide (11.09 ± 0.07 μg/L at 1μM). While fractionation increased α-glucosidase inhibition and glucose uptake of cells, in the ethyl acetate fraction, the α-amylase inhibition and insulin secretion decreased. The weight reducing and glucose control potential of the ethyl acetate fraction in an obese mouse model, important factors in the amelioration of type II diabetes was determined. The extract had no statistical significant weight reducing activity. Conclusion A major finding was the decrease in the area under the curve of the glucose concentration over time in animals that were treated with both a change in diet and with the plant extract. This is linked to increased glucose uptake within the cells, the most likely mechanism is either an increased insulin response or increased insulin secretion.
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Katekhaye SD, Paul A, Laddha KS. Lupane Analogue from Bark of Pithecellobium dulce and in vitro α-Glucosidase and α-Amylase Enzyme Inhibition Assay of Extract for Potential Antidiabetic Activity. Chem Nat Compd 2016. [DOI: 10.1007/s10600-016-1645-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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236
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Jin T, Yu H, Huang XF. Selective binding modes and allosteric inhibitory effects of lupane triterpenes on protein tyrosine phosphatase 1B. Sci Rep 2016; 6:20766. [PMID: 26865097 PMCID: PMC4749975 DOI: 10.1038/srep20766] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 01/04/2016] [Indexed: 12/31/2022] Open
Abstract
Protein Tyrosine Phosphatase 1B (PTP1B) has been recognized as a promising therapeutic target for treating obesity, diabetes, and certain cancers for over a decade. Previous drug design has focused on inhibitors targeting the active site of PTP1B. However, this has not been successful because the active site is positively charged and conserved among the protein tyrosine phosphatases. Therefore, it is important to develop PTP1B inhibitors with alternative inhibitory strategies. Using computational studies including molecular docking, molecular dynamics simulations, and binding free energy calculations, we found that lupane triterpenes selectively inhibited PTP1B by targeting its more hydrophobic and less conserved allosteric site. These findings were verified using two enzymatic assays. Furthermore, the cell culture studies showed that lupeol and betulinic acid inhibited the PTP1B activity stimulated by TNFα in neurons. Our study indicates that lupane triterpenes are selective PTP1B allosteric inhibitors with significant potential for treating those diseases with elevated PTP1B activity.
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Affiliation(s)
- Tiantian Jin
- Centre for Translational Neuroscience, School of Medicine, University of Wollongong, and Illawarra Health and Medical Research Institute (IHMRI), Wollongong, NSW 2522, Australia
| | - Haibo Yu
- School of Chemistry, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Xu-Feng Huang
- Centre for Translational Neuroscience, School of Medicine, University of Wollongong, and Illawarra Health and Medical Research Institute (IHMRI), Wollongong, NSW 2522, Australia
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Inhibitory actions of Pseuderanthemum palatiferum (Nees) Radlk. leaf ethanolic extract and its phytochemicals against carbohydrate-digesting enzymes. Asian Pac J Trop Biomed 2016. [DOI: 10.1016/j.apjtb.2015.10.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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238
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Bose Mazumdar A, Chattopadhyay S. Sequencing, De novo Assembly, Functional Annotation and Analysis of Phyllanthus amarus Leaf Transcriptome Using the Illumina Platform. FRONTIERS IN PLANT SCIENCE 2016; 6:1199. [PMID: 26858723 PMCID: PMC4729934 DOI: 10.3389/fpls.2015.01199] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 12/14/2015] [Indexed: 05/23/2023]
Abstract
Phyllanthus amarus Schum. and Thonn., a widely distributed annual medicinal herb has a long history of use in the traditional system of medicine for over 2000 years. However, the lack of genomic data for P. amarus, a non-model organism hinders research at the molecular level. In the present study, high-throughput sequencing technology has been employed to enhance better understanding of this herb and provide comprehensive genomic information for future work. Here P. amarus leaf transcriptome was sequenced using the Illumina Miseq platform. We assembled 85,927 non-redundant (nr) "unitranscript" sequences with an average length of 1548 bp, from 18,060,997 raw reads. Sequence similarity analyses and annotation of these unitranscripts were performed against databases like green plants nr protein database, Gene Ontology (GO), Clusters of Orthologous Groups (COG), PlnTFDB, KEGG databases. As a result, 69,394 GO terms, 583 enzyme codes (EC), 134 KEGG maps, and 59 Transcription Factor (TF) families were generated. Functional and comparative analyses of assembled unitranscripts were also performed with the most closely related species like Populus trichocarpa and Ricinus communis using TRAPID. KEGG analysis showed that a number of assembled unitranscripts were involved in secondary metabolites, mainly phenylpropanoid, flavonoid, terpenoids, alkaloids, and lignan biosynthetic pathways that have significant medicinal attributes. Further, Fragments Per Kilobase of transcript per Million mapped reads (FPKM) values of the identified secondary metabolite pathway genes were determined and Reverse Transcription PCR (RT-PCR) of a few of these genes were performed to validate the de novo assembled leaf transcriptome dataset. In addition 65,273 simple sequence repeats (SSRs) were also identified. To the best of our knowledge, this is the first transcriptomic dataset of P. amarus till date. Our study provides the largest genetic resource that will lead to drug development and pave the way in deciphering various secondary metabolite biosynthetic pathways in P. amarus, especially those conferring the medicinal attributes of this potent herb.
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MEDJAHED Z, ATMANI-KILANI D, FAUCONNIER ML, RICHARD G, ATMANI D. Hepatoprotective and antidiabetic activities of Fraxinus angustifolia Vahl extracts in animal models: characterization by high performance liquid chromatography analysis. Turk J Med Sci 2016; 46:910-20. [DOI: 10.3906/sag-1502-13] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Accepted: 05/11/2015] [Indexed: 11/03/2022] Open
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Alhassan AM, Ahmed QU. Averrhoa bilimbi Linn.: A review of its ethnomedicinal uses, phytochemistry, and pharmacology. J Pharm Bioallied Sci 2016; 8:265-271. [PMID: 28216948 PMCID: PMC5314823 DOI: 10.4103/0975-7406.199342] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Averrhoa bilimbi Linn. is principally cultivated for medicinal purposes in many tropical and subtropical countries of the world. Literature survey about this plant shows that A. bilimbi is mainly used as a folk medicine in the treatment of diabetes mellitus, hypertension, and as an antimicrobial agent. The prime objective of this review is to accumulate and organize literature based on traditional claims and correlate those with current findings on the use of A. bilimbi in the management of different ailments. Through interpreting already published scientific manuscripts (1995 through 2015) retrieved from the different scientific search engines, namely Medline, PubMed, EMBASE, and Science Direct databases, published articles and reports covering traditional and scientific literature related to A. bilimbi's potential role against various ailments have been thoroughly evaluated, interpreted, and discussed. Several pharmacological studies have demonstrated the ability of this plant to act as antidiabetic, antihypertensive, thrombolytic, antimicrobial, antioxidant, hepatoprotective, and hypolipidemic agent. A. bilimbi holds great value in the complementary and alternative medicine as evidenced by the substantial amount of research on it. Therefore, we aimed to compile an up-to-date and comprehensive review of A. bilimbi that covers its traditional and folk medicine uses, phytochemistry, and pharmacology. Hence, this paper presents an up-to-date and comprehensive review of the ethnomedicinal uses, different chemical constituents, and pharmacological activities of A. bilimbi. So far, the biologically active agents have not been isolated from this plant and this can be a good scientific study for the future antidiabetic, antihypertensive, and antimicrobial implications. Hence, this review targets at emphasizing the diverse traditional claims and pharmacological activities of A. bilimbi with respect to carrying out more scientific studies to isolate active principles through advanced technology.
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Affiliation(s)
- Alhassan Muhammad Alhassan
- Department of Pharmaceutical Chemistry, Kulliyyah of Pharmacy, International Islamic University Malaysia, 25200 Kuantan, Pahang DM, Malaysia
| | - Qamar Uddin Ahmed
- Department of Pharmaceutical Chemistry, Kulliyyah of Pharmacy, International Islamic University Malaysia, 25200 Kuantan, Pahang DM, Malaysia
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Influence of Sodium Alginate on Hypoglycemic Activity of Metformin Hydrochloride in the Microspheres Obtained by the Spray Drying. INT J POLYM SCI 2016. [DOI: 10.1155/2016/8635408] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Alginate microspheres with metformin hydrochloride were prepared by the spray drying method in order to improve residence time of drug in the stomach. Nine formulations (F1–F9) with various drug : polymer ratio (1 : 2, 1 : 1, and 2 : 1) and different sodium alginate concentration (1%, 2%, and 3%) were evaluated for size, morphology, drug loading, Zeta potential, and swelling degree.In vitrodrug release, mathematical release profile, and physical state of microspheres were also evaluated. Optimal formulation characterized by the highest drug loading was formulation F6 (drug : polymer ratio 2 : 1 and 2% alginate solution). Based on glucose uptake inSaccharomyces cerevisiaecells andα-amylase inhibition tests, it could be concluded that alginate microspheres enhance hypoglycemic activity of metformin hydrochloride evaluatedin vitro. Designed microspheres are promising as alternative, multicompartment dosage form for metformin hydrochloride delivery.
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242
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Saeed R, Ahmed D. Bioactive compounds from Carissa opaca roots and xanthine oxidase and alpha-amylase inhibitory activities of their methanolic extract and its fractions in different solvents. Pharmacognosy Res 2015; 7:295-301. [PMID: 26692741 PMCID: PMC4660506 DOI: 10.4103/0974-8490.158440] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Background: Carissa opaca is known for its many ethnomedicinal uses. There was a need to study its bioactivities and identify its phytochemicals. Objective: The objective was to isolate and identify phytochemicals from roots of C. opaca and to evaluate xanthine oxidase (XO) and alpha-amylase inhibitory activities of their methanolic extract and its fractions. Materials and Methods: Methanolic extract of finely divided powder of roots of C. opaca was obtained by cold maceration, followed by its fractionation to obtain hexane, chloroform, ethyl acetate, n-butanolic, and aqueous fractions. Phytochemicals screening was done by standard protocols. XO and alpha-amylase inhibitory activities of the methanolic extract and its fractions were studied. The most active ethyl acetate fraction was subjected to the column and thin layer chromatography to isolate its compounds, which were identified by gas chromatography-mass spectrometry and high-performance liquid chromatography comparison. Results: Methanolic extract displayed significant activity against both the enzymes with IC50 of 156.0 mg/mL and 5.6 mg/mL for XO and alpha-amylase, respectively. Ethyl acetate fraction showed highest activity against both the enzymes with IC50 of 129 mg/mL and 4.9 mg/mL for XO and alpha-amylase, respectively. Chloroform fraction had IC50 of 154.2 mg/mL and 5.5 mg/mL for XO and alpha-amylase, respectively. Aqueous fraction exhibited significant efficacy against alpha-amylase (IC50 5.0 mg/mL). Hexane fraction showed good activity against alpha-amylase in a dose-dependent manner but exhibited opposite trend against XO. The compounds isolated from ethyl acetate fraction included limonene, vanillin, lupeol, rutin, quercetin, b-sitosterol, Vitamin E, 2-hydroxyacetophenone, naphthalenone, 2,3,3-trimethyl-2-(3-methylbuta-1,3-dienyl)-6-methylenecyclohexanone, and 2-benzenedicarboxylic acid, mono(2-ethylhexyl) ester. Conclusions: Moderately polar phytochemicals of C. opaca roots possess exploitable inhibitory activity against both the enzymes.
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Affiliation(s)
- Ramsha Saeed
- Department of Chemistry, Forman Christian College (A Chartered University), Lahore, Pakistan
| | - Dildar Ahmed
- Department of Chemistry, Forman Christian College (A Chartered University), Lahore, Pakistan
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243
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Buchholz T, Melzig MF. Medicinal Plants Traditionally Used for Treatment of Obesity and Diabetes Mellitus - Screening for Pancreatic Lipase and α-Amylase Inhibition. Phytother Res 2015; 30:260-6. [PMID: 26632284 DOI: 10.1002/ptr.5525] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 10/26/2015] [Accepted: 11/05/2015] [Indexed: 01/09/2023]
Abstract
In order to find new pancreatic lipase (PL) and α-amylase inhibitors from natural sources for the treatment of obesity and related diseases as diabetes mellitus II, 23 medicinal plants with weight-reducing, serum glucose-reducing or related potential were investigated. Methanolic and water extracts of the plants were evaluated by using two in vitro test systems. Our findings have shown that the methanolic extract of Hibiscus sabdariffa L. (Malvaceae) showed high inhibitory activities to PL (IC50 : 35.8 ± 0.8 µg/mL) and α-amylase (IC50 : 29.3 ± 0.5 µg/mL). Furthermore, the methanolic extract of Tamarindus indica L. (Leguminosae) showed a high anti-lipase (IC50 : 152.0 ± 7.0 µg/mL) and the aqueous extract a high anti-amylase (IC50 : 139.4 ± 9.0 µg/mL) activity. This work provides a priority list of interesting plants for further study with respect to the treatment of obesity and associated diseases.
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Affiliation(s)
- Tina Buchholz
- Institute of Pharmacy, Freie Universitaet Berlin, Berlin, Germany
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244
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Alu'datt MH, Rababah T, Alhamad MN, Ereifej K, Al-Mahasneh M, Brewer S, Rawshdeh M. Optimization Extraction Conditions for Phenolic Compounds, Antioxidant and Inhibitory Activities of Angiotensin I-Converting Enzyme (ACE), α-Glucosidase and α-Amylase from M
entha Spicata
L. J Food Biochem 2015. [DOI: 10.1111/jfbc.12222] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Muhammad H. Alu'datt
- Department of Nutrition and Food Technology; Jordan University of Science and Technology; PO Box 3030 Irbid 22110 Jordan
| | - Taha Rababah
- Department of Nutrition and Food Technology; Jordan University of Science and Technology; PO Box 3030 Irbid 22110 Jordan
| | - Mohammad N. Alhamad
- Faculty of Agriculture; Jordan University of Science and Technology; PO Box 3030 Irbid 22110 Jordan
| | - Khalil Ereifej
- Department of Nutrition and Food Technology; Jordan University of Science and Technology; PO Box 3030 Irbid 22110 Jordan
| | - Majdi Al-Mahasneh
- Department of Chemical Engineering; Faculty of Engineering; Jordan University of Science and Technology; Irbid Jordan
| | - Susan Brewer
- Department of Food Science and Human Nutrition; University of Illinois at Urbana-Champaign; Urbana IL
| | - Mervat Rawshdeh
- Department of Nutrition and Food Technology; Jordan University of Science and Technology; PO Box 3030 Irbid 22110 Jordan
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245
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Berne S, Kalauz M, Lapat M, Savin L, Janussen D, Kersken D, Ambrožič Avguštin J, Zemljič Jokhadar Š, Jaklič D, Gunde-Cimerman N, Lunder M, Roškar I, Eleršek T, Turk T, Sepčić K. Screening of the Antarctic marine sponges (Porifera) as a source of bioactive compounds. Polar Biol 2015. [DOI: 10.1007/s00300-015-1835-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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246
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Borges KC, Azevedo JC, Medeiros MDF, Correia RTP. Physicochemical Characterization and Bioactive Value of Tropical Berry Pomaces after Spouted Bed Drying. J FOOD QUALITY 2015. [DOI: 10.1111/jfq.12178] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
- Kátia Cristina Borges
- Laboratory of Food Bioactive Compounds (LABTA/UFRN); Chemical Engineering Department; Federal University of Rio Grande do Norte; Natal Rio Grande do Norte 59072-970 Brazil
| | - Juliana Chris Azevedo
- Laboratory of Food Bioactive Compounds (LABTA/UFRN); Chemical Engineering Department; Federal University of Rio Grande do Norte; Natal Rio Grande do Norte 59072-970 Brazil
| | - Maria de Fátima Medeiros
- Laboratory of Food Bioactive Compounds (LABTA/UFRN); Chemical Engineering Department; Federal University of Rio Grande do Norte; Natal Rio Grande do Norte 59072-970 Brazil
| | - Roberta Targino P. Correia
- Laboratory of Food Bioactive Compounds (LABTA/UFRN); Chemical Engineering Department; Federal University of Rio Grande do Norte; Natal Rio Grande do Norte 59072-970 Brazil
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247
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Buddhachat K, Osathanunkul M, Madesis P, Chomdej S, Ongchai S. Authenticity analyses of Phyllanthus amarus using barcoding coupled with HRM analysis to control its quality for medicinal plant product. Gene 2015; 573:84-90. [DOI: 10.1016/j.gene.2015.07.046] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 07/01/2015] [Accepted: 07/10/2015] [Indexed: 12/11/2022]
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248
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Ahmad MS, Bano S, Anwar S. Cancer ameliorating potential of Phyllanthus amarus: In vivo and in vitro studies against Aflatoxin B1 toxicity. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2015. [DOI: 10.1016/j.ejmhg.2015.05.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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249
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Wu P, Zheng J, Huang T, Li D, Hu Q, Cheng A, Jiang Z, Jiao L, Zhao S, Zhang K. Synthesis and Evaluation of Novel Triterpene Analogues of Ursolic Acid as Potential Antidiabetic Agent. PLoS One 2015; 10:e0138767. [PMID: 26406581 PMCID: PMC4583267 DOI: 10.1371/journal.pone.0138767] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Accepted: 09/03/2015] [Indexed: 11/28/2022] Open
Abstract
Ursolic acid (UA) is a naturally bioactive compound that possesses potential anti-diabetic activity. The relatively safe and effective molecule intrigued us to further explore and to improve its anti-diabetic activity. In the present study, a series of novel UA analogues was synthesized and their structures were characterized. Their bioactivities against the α-glucosidase from baker's yeast were determined in vitro. The results suggested that most of the analogues exhibited significant inhibitory activity, especially analogues 8b and 9b with the IC50 values of 1.27 ± 0.27 μM (8b) and 1.28 ± 0.27 μM (9b), which were lower than the other analogues and the positive control. The molecular docking and 2D-QSAR studies were carried out to prove that the C-3 hydroxyl could interact with the hydrophobic region of the active pocket and form hydrogen bonds to increase the binding affinity of ligand and the homology modelling protein. Thus, these results will be helpful for understanding the relationship between binding mode and bioactivity and for designing better inhibitors from UA analogues.
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Affiliation(s)
- Panpan Wu
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Jie Zheng
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Tianming Huang
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Dianmeng Li
- Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin, China
| | - Qingqing Hu
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Anming Cheng
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Zhengyun Jiang
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Luoying Jiao
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Suqing Zhao
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Kun Zhang
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
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250
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Kazeem MI, Ashafa AOT. In-vitro antioxidant and antidiabetic potentials of Dianthus basuticus Burtt Davy whole plant extracts. J Herb Med 2015. [DOI: 10.1016/j.hermed.2015.06.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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