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Chukwuma IF, Nworah FN, Apeh VO, Omeje KO, Nweze EJ, Asogwa CD, Ezeorba TPC. Phytochemical Characterization, Functional Nutrition, and Anti-Diabetic Potentials of Leptadenia hastata (pers) Decne Leaves: In Silico and In Vitro Studies. Bioinform Biol Insights 2022; 16:11779322221115436. [PMID: 35982736 PMCID: PMC9379957 DOI: 10.1177/11779322221115436] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 07/04/2022] [Indexed: 11/17/2022] Open
Abstract
The geometrical increase in diabetes mellitus (DM) and the undesirable side
effects of synthetic drugs have intensified efforts to search for an effective
and safe anti-diabetic therapy. This study aimed to identify the antioxidant and
anti-diabetic agents in the ethanol extract of Leptadenia
hastata (EELH). The phytochemicals, antioxidant vitamins, and
minerals present in EELH were determined using standard procedures to achieve
this aim. Gas chromatography coupled with mass spectroscopy and flame ionization
detector (GC-MS/GC-FID) was employed to identify bioactive compounds. An
e-pharmacophore model was generated from the extra precision, and
energy-minimized docked position of standard inhibitor, acarbose onto human
pancreatic amylase (HPA, PDB-6OCN). It was used to screen the GC-MS/GC-FID
library of compounds. The top-scoring compounds were subjected to glide
XP-docking and prime MM-GBSA calculation with the Schrodinger suite-v12.4. The
Adsorption, Distribution, Metabolism, Excretion, and Toxicity (ADMET) prediction
of the best-fit compounds was made using SwissADME and PROTOX-II webservers.
Further validation of the docking results was performed with the in vitro
analysis of the α-amylase and α-glucosidase inhibitory activities. EELH contains
appreciable amounts of antioxidant and anti-diabetic phytoconstituents. The
top-4 scoring compounds (rutin, epicatechin, kaempferol, and naringenin) from
the EELH phytochemical library interacted with amino acid residues within and
around the HPA active site. The ADMET prediction shows that epicatechin,
kaempferol, and naringenin had favorable drug-likeness, pharmacokinetic
properties, and a good safety profile. EELH demonstrated good inhibitory actions
against α-amylase and α-glucosidase with 1C50 values of 14.14 and
4.22 µg/mL, respectively. Thus, L hastata phytoconstituents are
promising novel candidates for developing an anti-diabetic drug.
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Affiliation(s)
- Ifeoma Felicia Chukwuma
- Department of Biochemistry, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria.,Department of Genetics and Biotechnology, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria
| | - Florence Nkechi Nworah
- Department of Biochemistry, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria
| | - Victor Onukwube Apeh
- Department of Applied Sciences, Federal College of Dental Technology and Therapy, Enugu, Nigeria
| | - Kingsley Ozioma Omeje
- Department of Biochemistry, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria
| | - Ekene John Nweze
- Department of Biochemistry, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria
| | - Chukwudi Daniel Asogwa
- Department of Biochemistry, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria
| | - Timothy Prince Chidike Ezeorba
- Department of Biochemistry, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria.,Department of Genetics and Biotechnology, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria.,Department of Molecular Biotechnology, School of Biosciences, University of Birmingham, Birmingham, UK
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Dipeptidyl Peptidase (DPP)-IV Inhibitors with Antioxidant Potential Isolated from Natural Sources: A Novel Approach for the Management of Diabetes. Pharmaceuticals (Basel) 2021; 14:ph14060586. [PMID: 34207217 PMCID: PMC8234173 DOI: 10.3390/ph14060586] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 06/08/2021] [Accepted: 06/13/2021] [Indexed: 02/02/2023] Open
Abstract
Type 2 diabetes mellitus (T2DM) is characterized by hyperglycemia that is predominantly caused by insulin resistance or impaired insulin secretion, along with disturbances in carbohydrate, fat and protein metabolism. Various therapeutic approaches have been used to treat diabetes, including improvement of insulin sensitivity, inhibition of gluconeogenesis, and decreasing glucose absorption from the intestines. Recently, a novel approach has emerged using dipeptidyl peptidase-IV (DPP-IV) inhibitors as a possible agent for the treatment of T2DM without producing any side effects, such as hypoglycemia and exhaustion of pancreatic β-cells. DPP-IV inhibitors improve hyperglycemic conditions by stabilizing the postprandial level of gut hormones such as glucagon-like peptide-1, and glucose-dependent insulinotropic polypeptides, which function as incretins to help upregulate insulin secretion and β-cell mass. In this review, we summarized DPP-IV inhibitors and their mechanism of inhibition, activities of those isolated from various natural sources, and their capacity to overcome oxidative stress in disease conditions.
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Domínguez-Mendoza EA, Galván-Ciprés Y, Martínez-Miranda J, Miranda-González C, Colín-Lozano B, Hernández-Núñez E, Hernández-Bolio GI, Palomino-Hernández O, Navarrete-Vazquez G. Design, Synthesis, and In Silico Multitarget Pharmacological Simulations of Acid Bioisosteres with a Validated In Vivo Antihyperglycemic Effect. Molecules 2021; 26:molecules26040799. [PMID: 33557136 PMCID: PMC7913794 DOI: 10.3390/molecules26040799] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 01/31/2021] [Accepted: 02/02/2021] [Indexed: 01/16/2023] Open
Abstract
Substituted phenylacetic (1-3), phenylpropanoic (4-6), and benzylidenethiazolidine-2,4-dione (7-9) derivatives were designed according to a multitarget unified pharmacophore pattern that has shown robust antidiabetic activity. This bioactivity is due to the simultaneous polypharmacological stimulation of receptors PPARα, PPARγ, and GPR40 and the enzyme inhibition of aldose reductase (AR) and protein tyrosine phosphatase 1B (PTP-1B). The nine compounds share the same four pharmacophore elements: an acid moiety, an aromatic ring, a bulky hydrophobic group, and a flexible linker between the latter two elements. Addition and substitution reactions were performed to obtain molecules at moderated yields. In silico pharmacological consensus analysis (PHACA) was conducted to determine their possible modes of action, protein affinities, toxicological activities, and drug-like properties. The results were combined with in vivo assays to evaluate the ability of these compounds to decrease glucose levels in diabetic mice at a 100 mg/kg single dose. Compounds 6 (a phenylpropanoic acid derivative) and 9 (a benzylidenethiazolidine-2,4-dione derivative) ameliorated the hyperglycemic peak in a statically significant manner in a mouse model of type 2 diabetes. Finally, molecular dynamics simulations were executed on the top performing compounds to shed light on their mechanism of action. The simulations showed the flexible nature of the binding pocket of AR, and showed that both compounds remained bound during the simulation time, although not sharing the same binding mode. In conclusion, we designed nine acid bioisosteres with robust in vivo antihyperglycemic activity that were predicted to have favorable pharmacokinetic and toxicological profiles. Together, these findings provide evidence that supports the molecular design we employed, where the unified pharmacophores possess a strong antidiabetic action due to their multitarget activation.
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Affiliation(s)
- Elix Alberto Domínguez-Mendoza
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos 62209, Mexico; (E.A.D.-M.); (Y.G.-C.); (J.M.-M.); (C.M.-G.); (B.C.-L.)
| | - Yelzyn Galván-Ciprés
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos 62209, Mexico; (E.A.D.-M.); (Y.G.-C.); (J.M.-M.); (C.M.-G.); (B.C.-L.)
| | - Josué Martínez-Miranda
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos 62209, Mexico; (E.A.D.-M.); (Y.G.-C.); (J.M.-M.); (C.M.-G.); (B.C.-L.)
| | - Cristian Miranda-González
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos 62209, Mexico; (E.A.D.-M.); (Y.G.-C.); (J.M.-M.); (C.M.-G.); (B.C.-L.)
| | - Blanca Colín-Lozano
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos 62209, Mexico; (E.A.D.-M.); (Y.G.-C.); (J.M.-M.); (C.M.-G.); (B.C.-L.)
| | - Emanuel Hernández-Núñez
- Cátedra CONACyT, Departamento de Recursos del Mar, Centro de Investigación y de Estudios Avanzados, IPN, Unidad Mérida, Yucatan 97310, Mexico; (E.H.-N.); (G.I.H.-B.)
| | - Gloria I. Hernández-Bolio
- Cátedra CONACyT, Departamento de Recursos del Mar, Centro de Investigación y de Estudios Avanzados, IPN, Unidad Mérida, Yucatan 97310, Mexico; (E.H.-N.); (G.I.H.-B.)
| | - Oscar Palomino-Hernández
- Computational Biomedicine (IAS-5/INM-9), Forschungszentrum Juelich, 52425 Julich, Germany;
- Department of Chemistry, Rheinisch-Westfälische Technische Hochschule Aachen, 52425 Aachen, Germany
| | - Gabriel Navarrete-Vazquez
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos 62209, Mexico; (E.A.D.-M.); (Y.G.-C.); (J.M.-M.); (C.M.-G.); (B.C.-L.)
- Correspondence: ; Tel.: +52-777-329-7089 (ext. 2322)
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Galani BRT, Owona BA, Chuisseu DPD, Machewere E, Ngantchouko CBN, Moundipa PF. Hepatoprotective Activity of Leptadenia hastata ( Asclepiadaceae) on Acetaminophen-Induced Toxicity in Mice: In Vivo Study and Characterization of Bioactive Compounds through Molecular Docking Approaches. BIOMED RESEARCH INTERNATIONAL 2020; 2020:3807234. [PMID: 32953880 PMCID: PMC7482022 DOI: 10.1155/2020/3807234] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 07/18/2020] [Accepted: 08/07/2020] [Indexed: 02/05/2023]
Abstract
MATERIALS AND METHODS Various aqueous extracts were prepared from this plant and preadministered per os to albino mice 3 h before APAP administration, once daily for one week. Animals from the normal group were given only distilled water while those from negative control received only APAP 250 mg/kg. After treatment, mice were sacrificed, the liver was collected for histopathology analysis, and different biochemical markers (alanine aminotransferase (ALT), superoxide dismutase (SOD), catalase (CAT), glutathione (GSH), malondialdehyde (MDA), and tumor necrosis factor-alpha (TNFα)) were measured. The content of the active extract was analyzed by HPLC/UV. Molecular docking was conducted using iGEMDOCK software, and the drug-likeness and pharmacokinetic profiles were evaluated using Swiss ADME. RESULTS APAP administration significantly increased (p < 0.001) ALT in liver homogenates when compared to normal controls whereas the stem decoction at 250 mg/kg significantly (p < 0.001) reduced this activity to a normal value comparable to silymarin 50 mg/kg which is better than leaf and root extracts. Moreover, the stem decoction also significantly reduced the MDA levels (p < 0.05) and increased those of GSH, SOD, and CAT (p < 0.001) at doses of 250 and 500 mg/kg compared to the negative control. A significant (p < 0.001) decrease of TNFα levels and leukocyte infiltration was observed following treatment with this extract. The HPLC/UV analysis of the decoction revealed the presence of dihydroxycoumarin, quinine, and scopoletin with the following retention times: 2.6, 5.1, and 7.01 min, respectively. In silico studies showed that quinine and dihydroxycoumarin had great potentials to be orally administered drugs and possessed strong binding affinities with TNFα, TNF receptor, cyclooxygenase-2, iNOS, cytochrome P450 2E1, and GSH reductase. CONCLUSION Based on these results, L. hastata could be considered a source of promising hepatoprotective compounds with antioxidant and anti-inflammatory properties.
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Affiliation(s)
- Borris R. T. Galani
- Laboratory of Applied Biochemistry, Department of Biological Sciences, Faculty of Science, University of Ngaoundere, P.O. Box 454 Ngaoundere, Cameroon
- Laboratory of Pharmacology and Toxicology, Department of Biochemistry, Faculty of Science, University of Yaounde I, P.O. Box 812 Yaounde, Cameroon
| | - Brice A. Owona
- Laboratory of Pharmacology and Toxicology, Department of Biochemistry, Faculty of Science, University of Yaounde I, P.O. Box 812 Yaounde, Cameroon
| | - Dieudonné P. D. Chuisseu
- Laboratory of Pharmacology and Toxicology, Department of Biochemistry, Faculty of Science, University of Yaounde I, P.O. Box 812 Yaounde, Cameroon
- Department of Medicine, Medical and Biomedical Sciences, Higher Institute of Health Sciences, Université des Montagnes, P.O. Box 208 Bangangte, Cameroon
| | - Esaïe Machewere
- Laboratory of Applied Biochemistry, Department of Biological Sciences, Faculty of Science, University of Ngaoundere, P.O. Box 454 Ngaoundere, Cameroon
| | - Claude B. N. Ngantchouko
- Department of Pharmacy, Higher Institute of Health Sciences, Université des Montagnes, P.O. Box 208 Bangangte, Cameroon
| | - Paul F. Moundipa
- Laboratory of Pharmacology and Toxicology, Department of Biochemistry, Faculty of Science, University of Yaounde I, P.O. Box 812 Yaounde, Cameroon
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Pingali U, Ali MA, Gundagani S, Nutalapati C. Evaluation of the Effect of an Aqueous Extract of Azadirachta indica (Neem) Leaves and Twigs on Glycemic Control, Endothelial Dysfunction and Systemic Inflammation in Subjects with Type 2 Diabetes Mellitus - A Randomized, Double-Blind, Placebo-Controlled Clinical Study. Diabetes Metab Syndr Obes 2020; 13:4401-4412. [PMID: 33244247 PMCID: PMC7683773 DOI: 10.2147/dmso.s274378] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 09/26/2020] [Indexed: 12/14/2022] Open
Abstract
PURPOSE Neem tree (Azadirachta indica) offers different bioactives ranging from pesticides to therapeutic molecules, depending on which part of the plant is used and the extraction methodology and the solvent used. This study was aimed at evaluating the safety and efficacy of a standardized aqueous extract of Azadirachta indica leaves and twigs (NEEM) on glycemic control, endothelial dysfunction, and systemic inflammation in patients with type 2 diabetes mellitus (T2DM). METHODS In this randomized, double-blind, placebo-controlled clinical study (RCT), 80 T2DM subjects, who have already been on standard metformin therapy, received either 125 mg, 250 mg, 500 mg of NEEM or placebo twice daily for 12 weeks. Postprandial blood sugar level (PPBS), fasting blood sugar level (FBS), glycosylated hemoglobin (HbA1c), insulin resistance (IR), endothelial function, oxidative stress, systemic inflammation, IL-6 and TNF-α, platelet aggregation and lipid profile were assessed. Adverse drug reactions, if any, were noted. GraphPad Prism 8 was used to perform statistical analysis. RESULTS NEEM at the doses of 125, 250, and 500 mg BID significantly reduced PPBS (from 194.4±14 to 173.1±12.8mg/dL, 192.3±17.1 to 161.8±9.7mg/dL, and 205.9±7.2 to 159.3±7.1mg/dL, respectively), FBS (from 119.2±5.0 to 109.2±5.7mg/dL, 115.5±4.4 to 103.7±4.2mg/dL, and 120.7±4.2 to 97.3±3.7mg/dL, respectively), HbA1c (from 6.87 ± 0.4% to 6.64 ± 0.4%, 7.52 ± 0.4% to 6.86 ± 0.3%, and 7.78 ± 0.2% to 6.26 ± 0.4%, respectively), and IR (from 4.5 ± 1.2 to 3.4 ± 0.9, 3.8 ± 1.1 to 2.5 ± 0.6, and 4.6 ± 1.3 to 2.0 ± 0.6, respectively) compared to placebo. Also, NEEM significantly improved endothelial function, decreased oxidative stress and systemic inflammation compared to placebo. The efficacy was significant with all the doses, but no effect on platelet aggregation or lipid profile was observed. CONCLUSION NEEM may significantly ameliorate hyperglycemia, endothelial dysfunction, and systemic inflammation, on top of what metformin could do, in subjects with T2DM.
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Affiliation(s)
- Usharani Pingali
- Department of Pharmacology and Therapeutics, Nizam’s Institute of Medical Sciences, Hyderabad, Telangana500073, India
- Correspondence: Usharani Pingali Email
| | - Mohammed Abid Ali
- Department of Pharmacology and Therapeutics, Nizam’s Institute of Medical Sciences, Hyderabad, Telangana500073, India
| | - Srinivas Gundagani
- Department of Pharmacology and Therapeutics, Nizam’s Institute of Medical Sciences, Hyderabad, Telangana500073, India
| | - Chandrasekhar Nutalapati
- Department of Pharmacology and Therapeutics, Nizam’s Institute of Medical Sciences, Hyderabad, Telangana500073, India
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Lankatillake C, Huynh T, Dias DA. Understanding glycaemic control and current approaches for screening antidiabetic natural products from evidence-based medicinal plants. PLANT METHODS 2019; 15:105. [PMID: 31516543 PMCID: PMC6731622 DOI: 10.1186/s13007-019-0487-8] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 08/20/2019] [Indexed: 05/15/2023]
Abstract
Type 2 Diabetes Mellitus has reached epidemic proportions as a result of over-nutrition and increasingly sedentary lifestyles. Current therapies, although effective, are not without limitations. These limitations, the alarming increase in the prevalence of diabetes, and the soaring cost of managing diabetes and its complications underscores an urgent need for safer, more efficient and affordable alternative treatments. Over 1200 plant species are reported in ethnomedicine for treating diabetes and these represents an important and promising source for the identification of novel antidiabetic compounds. Evaluating medicinal plants for desirable bioactivity goes hand-in-hand with methods in analytical biochemistry for separating and identifying lead compounds. This review aims to provide a comprehensive summary of current methods used in antidiabetic plant research to form a useful resource for researchers beginning in the field. The review summarises the current understanding of blood glucose regulation and the general mechanisms of action of current antidiabetic medications, and combines knowledge on common experimental approaches for screening plant extracts for antidiabetic activity and currently available analytical methods and technologies for the separation and identification of bioactive natural products. Common in vivo animal models, in vitro models, in silico methods and biochemical assays used for testing the antidiabetic effects of plants are discussed with a particular emphasis on in vitro methods such as cell-based bioassays for screening insulin secretagogues and insulinomimetics. Enzyme inhibition assays and molecular docking are also highlighted. The role of metabolomics, metabolite profiling, and dereplication of data for the high-throughput discovery of novel antidiabetic agents is reviewed. Finally, this review also summarises sample preparation techniques such as liquid-liquid extraction, solid phase extraction, and supercritical fluid extraction, and the critical function of nuclear magnetic resonance and high resolution liquid chromatography-mass spectrometry for the dereplication, putative identification and structure elucidation of natural compounds from evidence-based medicinal plants.
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Affiliation(s)
- Chintha Lankatillake
- School of Health and Biomedical Sciences, Discipline of Laboratory Medicine, RMIT University, Bundoora, 3083 Australia
| | - Tien Huynh
- School of Science, RMIT University, Bundoora, VIC 3083 Australia
| | - Daniel A. Dias
- School of Health and Biomedical Sciences, Discipline of Laboratory Medicine, RMIT University, Bundoora, 3083 Australia
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