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Tiwari VP, Dubey A, Al-Shehri M, Tripathi IP. Exploration of human pancreatic alpha-amylase inhibitors from Physalis peruviana for the treatment of type 2 diabetes. J Biomol Struct Dyn 2024; 42:1031-1046. [PMID: 37545158 DOI: 10.1080/07391102.2023.2243336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 03/25/2023] [Indexed: 08/08/2023]
Abstract
Type 2 Diabetes (T2D), a chronic metabolic disorder characterized by persistent hyperglycemia, accounts for ∼90% of all types of diabetes. Pancreatic α-amylase is a potential drug target for preventing postprandial hyperglycemia and inhibiting T2D in humans. Although many synthetic drugs have been identified against pancreatic α-amylase, however, reported several side effects, and plant-derived natural products are less explored against T2D. This study tested 34 flavonoids derived from the plant Physalis peruviana against the human pancreatic α-amylase (HPA) using in silico computational approaches such as molecular docking and molecular dynamics simulation approaches. Schrödinger, a drug discovery package with modules applicable for molecular docking, protein-ligand interaction analysis, molecular dynamics, post-dynamics simulation, and binding free energy calculation, was employed for all computational studies. Four flavonoids, namely, Chlorogenic acid, Withaperuvin F, Withaperuvin H, and Rutin, were picked based on their docking score ranging between -7.03 kcal/mol and -11.35 kcal/mol compared to the docking score -7.3 kcal/mol of reference ligand, i.e. Myricetin. The molecular dynamics analysis suggested that all flavonoids showed considerable stability within the protein's catalytic pocket, except chlorogenic acid, which showed high deviation during the last 15 ns. However, the interactions observed in initial docking and extracted from the simulation trajectory involved > 90% identical residues, indicating the affinity and stability of the docked flavonoids with the protein. Therefore, all four compounds identified in this study are proposed as promising antidiabetic candidates and should be further considered for their in vitro and in vivo validation.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Virendra Prasad Tiwari
- Faculty of Science & Environment, Mahatma Gandhi Chitrakoot Gramodaya Vishwavidyalaya, Chitrakoot, India
| | - Amit Dubey
- Computational Chemistry and Drug Discovery Division, Quanta Calculus, Greater Noida, India
| | - Mohammed Al-Shehri
- Department of Biology, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Indra Prasad Tripathi
- Faculty of Science & Environment, Mahatma Gandhi Chitrakoot Gramodaya Vishwavidyalaya, Chitrakoot, India
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2
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Liu H, Kang X, Ren P, Kuang X, Yang X, Yang H, Shen X, Yan H, Kang Y, Zhang F, Wang X, Guo L, Fan W. Hydrogen gas ameliorates acute alcoholic liver injury via anti-inflammatory and antioxidant effects and regulation of intestinal microbiota. Int Immunopharmacol 2023; 120:110252. [PMID: 37196556 DOI: 10.1016/j.intimp.2023.110252] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/23/2023] [Accepted: 04/25/2023] [Indexed: 05/19/2023]
Abstract
Alcoholic liver disease (ALD) is a globally prevalent liver-related disorder characterized by severe oxidative stress and inflammatory liver damage, for which no effective treatment is currently available. Hydrogen gas (H2) has been demonstrated to be an efficient antioxidant in various diseases in animals as well as humans. However, the protective effects of H2 on ALD and its underlying mechanisms remain to be elucidated. The present study demonstrated that H2 inhalation ameliorated liver injury, and attenuated liver oxidative stress, inflammation, and steatosis in an ALD mouse model. Moreover, H2 inhalation improved gut microbiota, including increasing the abundance of Lachnospiraceae and Clostridia, and decreasing the abundance of Prevotellaceae and Muribaculaceae, and also improved intestinal barrier integrity. Mechanistically, H2 inhalation blocked activation of the LPS/TLR4/NF-κB pathway in liver. Notably, it was further demonstrated that the reshaped gut microbiota may accelerate alcohol metabolism, regulate lipid homeostasis and maintain immune balance by bacterial functional potential prediction (PICRUSt). Fecal microbiota transplantation from mice that had undergone H2 inhalation significantly alleviated acute alcoholic liver injury. In summary, the present study showed that H2 inhalation alleviated liver injury by reducing oxidative stress and inflammation, while also improving intestinal flora and enhancing the intestinal barrier. H2 inhalation may serve as an effective intervention for preventing and treating ALD in a clinical context.
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Affiliation(s)
- Haixia Liu
- Department of Microbiology and Immunology, Shanxi Medical University, Jinzhong 030619, China; Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, China
| | - Xing Kang
- Department of Microbiology and Immunology, Shanxi Medical University, Jinzhong 030619, China; Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, China
| | - Peng Ren
- Department of Microbiology and Immunology, Shanxi Medical University, Jinzhong 030619, China; Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, China
| | - Xiaoyu Kuang
- Department of Microbiology and Immunology, Shanxi Medical University, Jinzhong 030619, China; Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, China
| | - Xiaodan Yang
- Department of Microbiology and Immunology, Shanxi Medical University, Jinzhong 030619, China; Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, China
| | - Hao Yang
- Department of Microbiology and Immunology, Shanxi Medical University, Jinzhong 030619, China; Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, China
| | - Xiaorong Shen
- Department of Microbiology and Immunology, Shanxi Medical University, Jinzhong 030619, China; Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, China
| | - Huan Yan
- Department of Microbiology and Immunology, Shanxi Medical University, Jinzhong 030619, China; Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, China
| | - Yongbo Kang
- Department of Microbiology and Immunology, Shanxi Medical University, Jinzhong 030619, China; Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, China
| | - Fan Zhang
- Department of Microbiology and Immunology, Shanxi Medical University, Jinzhong 030619, China; Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, China
| | - Xiaohui Wang
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, China; Laboratory of Morphology, Shanxi Medical University, Jinzhong 030619, China
| | - Linzhi Guo
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, China; Laboratory of Morphology, Shanxi Medical University, Jinzhong 030619, China
| | - Weiping Fan
- Department of Microbiology and Immunology, Shanxi Medical University, Jinzhong 030619, China; Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, China.
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Ogunyemi OM, Gyebi GA, Saheed A, Paul J, Nwaneri-Chidozie V, Olorundare O, Adebayo J, Koketsu M, Aljarba N, Alkahtani S, Batiha GES, Olaiya CO. Inhibition mechanism of alpha-amylase, a diabetes target, by a steroidal pregnane and pregnane glycosides derived from Gongronema latifolium Benth. Front Mol Biosci 2022; 9:866719. [PMID: 36032689 PMCID: PMC9399641 DOI: 10.3389/fmolb.2022.866719] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 07/07/2022] [Indexed: 12/23/2022] Open
Abstract
Alpha-amylase is widely exploited as a drug target for preventing postprandial hyperglycemia in diabetes and other metabolic diseases. Inhibition of this enzyme by plant-derived pregnanes is not fully understood. Herein, we used in vitro, in silico, and in vivo studies to provide further insights into the alpha-amylase inhibitory potential of selected pregnane-rich chromatographic fractions and four steroidal pregnane phytochemicals (SPPs), viz: marsectohexol (P1), 3-O-[6-deoxy-3-O-methyl-β-D-allopyranosyl-(1→14)-β-D-oleandropyranosyl]-11,12-di-O-tigloyl-17β-marsdenin (P2), 3-O-[6-deoxy-3-O-methyl-β-D-allopyranosyl-(1→4)-β-D-oleandropyranosyl]-17β-marsdenin (P3), and 3-O-[6-deoxy-3-O-methyl-β-D-allopyranosyl-(1→4)-β-D-canaropyranosyl]-17β-marsdenin (P4) derived from Gongronema latifolium Benth. The results revealed that the SPPs source pregnane-rich chromatographic fractions and the SPPs (P1–P4) exhibited inhibitory potential against porcine pancreatic alpha-amylase in vitro. Compounds P1 and P2 with IC50 values 10.01 and 12.10 µM, respectively, showed greater inhibitory potential than the reference acarbose (IC50 = 13.47 µM). Molecular docking analysis suggests that the SPPs had a strong binding affinity to porcine pancreatic alpha-amylase (PPA), human pancreatic alpha-amylase (HPA), and human salivary alpha-amylase (HSA), interacting with the key active site residues through an array of hydrophobic interactions and hydrogen bonds. The strong interactions of the SPPs with Glu233 and Asp300 residues may disrupt their roles in the acid-base catalytic mechanism and proper orientation of the polymeric substrates, respectively. The interactions with human pancreatic amylase were maintained in a dynamic environment as indicated by the root mean square deviation, radius of gyration, surface accessible surface area, and number of hydrogen bonds computed from the trajectories obtained from a 100-ns molecular dynamics simulation. Key loop regions of HPA that contribute to substrate binding exhibited flexibility and interaction potential toward the compounds as indicated by the root mean square fluctuation. Furthermore, P1 significantly reduced blood glucose levels and area under the curve in albino rats which were orally challenged with starch. Therefore, Gongronema latifolium and its constituent SPPs may be exploited as inhibitors of pancreatic alpha-amylase as an oral policy for impeding postprandial blood glucose rise.
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Affiliation(s)
- Oludare M. Ogunyemi
- Human Nutraceuticals and Bioinformatics Research Unit, Department of Biochemistry, Salem University, Lokoja, Nigeria
- Nutritional and Industrial Biochemistry Unit, Department of Biochemistry, University of Ibadan, Ibadan, Nigeria
- *Correspondence: Oludare M. Ogunyemi, ; Gideon A. Gyebi,
| | - Gideon A. Gyebi
- Department of Biochemistry, Faculty of Science and Technology Bingham University, Nasarawa, Nigeria
- Natural Products and Structural (Bio-Chem)-informatics Research Laboratory (NpsBC-Rl), Bingham University, Nasarawa, Nigeria
- *Correspondence: Oludare M. Ogunyemi, ; Gideon A. Gyebi,
| | - Afolabi Saheed
- Faculty of Basic Medical Sciences, Department of Pharmacology and Therapeutics, Faculty of Basic Clinical Sciences, University of Ilorin, Ilorin, Nigeria
| | - Jesse Paul
- Human Nutraceuticals and Bioinformatics Research Unit, Department of Biochemistry, Salem University, Lokoja, Nigeria
| | - Victoria Nwaneri-Chidozie
- Human Nutraceuticals and Bioinformatics Research Unit, Department of Biochemistry, Salem University, Lokoja, Nigeria
| | - Olufunke Olorundare
- Faculty of Basic Medical Sciences, Department of Pharmacology and Therapeutics, Faculty of Basic Clinical Sciences, University of Ilorin, Ilorin, Nigeria
| | - Joseph Adebayo
- Department of Biochemistry, Faculty of Life Sciences, University of Ilorin, Ilorin, Nigeria
| | - Mamoru Koketsu
- Faculty of Engineering, Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Nada Aljarba
- Department of Biology, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Saad Alkahtani
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Gaber El-Saber Batiha
- Department of Pharmacology and Therapeutics, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt
| | - Charles O. Olaiya
- Nutritional and Industrial Biochemistry Unit, Department of Biochemistry, University of Ibadan, Ibadan, Nigeria
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Laka K, Mapheto K, Mbita Z. Selective in vitro cytotoxicity effect of Drimia calcarata bulb extracts against p53 mutant HT-29 and p53 wild-type Caco-2 colorectal cancer cells through STAT5B regulation. Toxicol Rep 2021; 8:1265-1279. [PMID: 34195018 PMCID: PMC8233163 DOI: 10.1016/j.toxrep.2021.06.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 06/04/2021] [Accepted: 06/14/2021] [Indexed: 12/14/2022] Open
Abstract
Colorectal cancer is the fourth leading cause of oncological-related deaths and the third most diagnosed malignancy, worldwide. The emergence of chemoresistance is a fundamental drawback of colorectal cancer therapies and there is an urgent need for novel plant-derived therapeutics. In this regard, other compounds are needed to improve the efficacy of treatment against colorectal cancer. Medicinal plants have been effectively used by traditional doctors for decades to treat various ailments with little to no side effects. Drimia calcarata (D. calcarata) is one of the plants used by Pedi people in South Africa to treat a plethora of ailments. However, the anticancer therapeutic use of D. calcarata is less understood. Thus, this study was aimed at evaluating the potential anticancer activities of D. calcarata extracts against human colorectal cancer cells. The phytochemical analysis and antioxidant activity were analysed using LC-MS, DPPH, and FRAP. The inhibitory effects and IC50 values of D. calcarata extracts were determined using the MTT assay. Induction of cellular apoptosis was assessed using fluorescence microscopy, the Muse® Cell Analyser, and gene expression analysis by Polymerase Chain Reaction (PCR). Water extract (WE) demonstrated high phenolic, tannin, and flavonoid contents than the methanol extract (ME). LC-MS data demonstrated strong differences between the ME and WE. Moreover, WE showed the best antioxidant activity than ME. The MTT data showed that both ME and WE had no significant activity against human embryonic kidney Hek 293 cell line that served as non-cancer control cells. Caco-2 cells demonstrated high sensitivity to the ME and demonstrated resistance toward the WE, while HT-29 cells exhibited sensitivity to both D. calcarata extracts. The expression of apoptosis regulatory genes assessed by PCR revealed an upregulation of p53 by ME, accompanied by downregulation of Bcl-2 and high expression of Bax after treatment with curcumin. The Bax gene was undetected in HT-29 cells. The methanol extract induced mitochondrial-mediated apoptosis in colorectal Caco-2 and HT-29 cells and WE induced the extrinsic apoptotic pathway in HT-29 cells. ME downregulated STAT1, 3, and 5B in HT-29 cells. The D. calcarata bulb extracts, therefore, contain potential anticancer agents that can be further targeted for cancer therapeutics.
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Affiliation(s)
- K. Laka
- Department of Biochemistry, Microbiology and Biotechnology, University of Limpopo, Private Bag X1106, Sovenga, 0727, Polokwane, South Africa
| | - K.B.F. Mapheto
- Department of Biochemistry, Microbiology and Biotechnology, University of Limpopo, Private Bag X1106, Sovenga, 0727, Polokwane, South Africa
| | - Z. Mbita
- Department of Biochemistry, Microbiology and Biotechnology, University of Limpopo, Private Bag X1106, Sovenga, 0727, Polokwane, South Africa
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Song H, Mao W, Duan Z, Que Q, Zhou W, Chen X, Li P. Selection and validation of reference genes for measuring gene expression in Toona ciliata under different experimental conditions by quantitative real-time PCR analysis. BMC PLANT BIOLOGY 2020; 20:450. [PMID: 33003996 PMCID: PMC7528382 DOI: 10.1186/s12870-020-02670-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 09/23/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Before studying gene expression of different organisms, it is important to determine the best reference gene. At present, the most accurate method of detecting gene expression is quantitative real-time PCR (RT-qPCR). With this method, reference genes that are stable in different biological systems and under different conditions can be obtained. Toona ciliata Roem (T. ciliata). is a valuable and fast-growing timber specie. In this study, 20 reference genes were identified using RT-qPCR, as a primary prerequisite for future gene expression analysis. Four different methods, geNorm, NormFinder, BestKeeper, and RankAggreg were used to evaluate the expression stability of the 20 candidate reference genes in various tissues under different conditions. RESULTS The experimental results showed that TUB-α was the most stably expressed reference gene across all samples and UBC17 was the most stable in leaves and young stems under Hypsipyla robusta (H. robusta) and methyl jasmonate (MeJA) treatments. In addition, PP2C59 and UBC5B were the best-performing genes in leaves under H. robusta treatment, while HIS1 and ACT7 were the best reference genes in young stems. The two best reference genes were 60S-18 and TUB-α after treatment at 4 °C. The expression of HIS6 and MUB1 was the most stable under PEG6000 treatment. The accuracy of the selected reference genes was verified using the transcription factor MYB3 (TcMYB3) gene. CONCLUSIONS This is the first report to verify the best reference genes for normalizing gene expression in T. ciliata under different conditions, which will facilitate future elucidation of gene regulations in this species.
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Affiliation(s)
- Huiyun Song
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, Guangzhou, 510642, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangzhou, 510642, China
- South China Agricultural University, College of Forestry and Landscape Architecture, Guangzhou, 510642, China
| | - Wenmai Mao
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, Guangzhou, 510642, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangzhou, 510642, China
- South China Agricultural University, College of Forestry and Landscape Architecture, Guangzhou, 510642, China
| | - Zhihao Duan
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, Guangzhou, 510642, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangzhou, 510642, China
- South China Agricultural University, College of Forestry and Landscape Architecture, Guangzhou, 510642, China
| | - Qingmin Que
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, Guangzhou, 510642, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangzhou, 510642, China
- South China Agricultural University, College of Forestry and Landscape Architecture, Guangzhou, 510642, China
| | - Wei Zhou
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, Guangzhou, 510642, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangzhou, 510642, China
- South China Agricultural University, College of Forestry and Landscape Architecture, Guangzhou, 510642, China
| | - Xiaoyang Chen
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, Guangzhou, 510642, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangzhou, 510642, China
- South China Agricultural University, College of Forestry and Landscape Architecture, Guangzhou, 510642, China
| | - Pei Li
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, Guangzhou, 510642, China.
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangzhou, 510642, China.
- South China Agricultural University, College of Forestry and Landscape Architecture, Guangzhou, 510642, China.
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