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Dik B, Parlak TM, Ates MB, Tufan O. Exploring the combined therapeutic efficacy of bexarotene and icariin in type 2 diabetic rats. J Pharm Pharmacol 2024:rgae100. [PMID: 39024515 DOI: 10.1093/jpp/rgae100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 07/03/2024] [Indexed: 07/20/2024]
Abstract
OBJECTIVES The aim of this study was to determine the single and combined antidiabetic activity and side effects of the retinoid X receptor agonist bexarotene and the thioredoxin-interacting protein inhibitor and peroxisome proliferator-activated receptor γ and AMP-activated protein kinase activator icariin. METHODS The rats were grouped as healthy (control), diabetes, diabetes + bexarotene (20 mg/kg), diabetes + icariin (60 mg/kg), diabetes + bexarotene (10 mg/kg) + icariin (30 mg/kg) low-dose combination and diabetes + bexarotene (20 mg/kg) + icariin (60 mg/kg) high-dose combination groups. KEY FINDINGS Icariin treatment led to a significant reduction in glucose levels compared with the diabetes control group, a remarkable outcome observed 45 days after the initial application. HbA1c levels of the icariin and low-dose combination treatment groups were significantly lower than in the diabetes group. Notably, icariin treatment also significantly elevated HOMA-β levels, which is indicative of improved β-cell function. Icariin significantly decreased glucose levels at 30 and 120 min in the oral glucose tolerance test. Moreover, it ameliorated hepatocyte degeneration, hepatic cord dissociation, congestion, mononuclear cell infiltration in the liver, and degeneration in the pancreas. CONCLUSIONS Icariin treatment exhibited robust antidiabetic effects with fewer side effects than other treatment options in this study. In future studies, long-term and varying doses of icariin will contribute to the development of novel antidiabetic drugs.
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Affiliation(s)
- Burak Dik
- Department of Pharmacology and Toxicology, Selcuk University, Konya, 42130, Türkiye
| | - Tugba Melike Parlak
- Department of Pharmacology and Toxicology, Selcuk University, Konya, 42130, Türkiye
| | | | - Oznur Tufan
- Department of Pharmacology and Toxicology, Selcuk University, Konya, 42130, Türkiye
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Sun Y, Liu M, Sun W, Tang X, Zhou Y, Zhang J, Yang B. A Hemoglobin Bionics-Based System for Combating Antibiotic Resistance in Chronic Diabetic Wounds via Iron Homeostasis Regulation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2405002. [PMID: 38738270 DOI: 10.1002/adma.202405002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Revised: 05/09/2024] [Indexed: 05/14/2024]
Abstract
Owing to the increased tissue iron accumulation in patients with diabetes, microorganisms may activate high expression of iron-involved metabolic pathways, leading to the exacerbation of bacterial infections and disruption of systemic glucose metabolism. Therefore, an on-demand transdermal dosing approach that utilizes iron homeostasis regulation to combat antimicrobial resistance is a promising strategy to address the challenges associated with low administration bioavailability and high antibiotic resistance in treating infected diabetic wounds. Here, it is aimed to propose an effective therapy based on hemoglobin bionics to induce disturbances in bacterial iron homeostasis. The preferred "iron cargo" is synthesized by protoporphyrin IX chelated with dopamine and gallium (PDGa), and is delivered via a glucose/pH-responsive microneedle bandage (PDGa@GMB). The PDGa@GMB downregulates the expression levels of the iron uptake regulator (Fur) and the peroxide response regulator (perR) in Staphylococcus aureus, leading to iron nutrient starvation and oxidative stress, ultimately suppressing iron-dependent bacterial activities. Consequently, PDGa@GMB demonstrates insusceptibility to genetic resistance while maintaining sustainable antimicrobial effects (>90%) against resistant strains of both S. aureus and E. coli, and accelerates tissue recovery (<20 d). Overall, PDGa@GMB not only counteracts antibiotic resistance but also holds tremendous potential in mediating microbial-host crosstalk, synergistically attenuating pathogen virulence and pathogenicity.
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Affiliation(s)
- Yihan Sun
- Joint Laboratory of Opto, Functional Theranostics in Medicine and Chemistry, The First Hospital of Jilin University, Changchun, 130021, P. R. China
- State Key Laboratory of Supramolecular Structure and Material, Center for Supramolecular Chemical Biology, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Manxuan Liu
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, Hospital of Stomatology, Jilin University, Changchun, 130021, P. R. China
| | - Weihong Sun
- Joint Laboratory of Opto, Functional Theranostics in Medicine and Chemistry, The First Hospital of Jilin University, Changchun, 130021, P. R. China
- State Key Laboratory of Supramolecular Structure and Material, Center for Supramolecular Chemical Biology, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Xiaoduo Tang
- Joint Laboratory of Opto, Functional Theranostics in Medicine and Chemistry, The First Hospital of Jilin University, Changchun, 130021, P. R. China
- State Key Laboratory of Supramolecular Structure and Material, Center for Supramolecular Chemical Biology, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, Hospital of Stomatology, Jilin University, Changchun, 130021, P. R. China
| | - Yanmin Zhou
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, Hospital of Stomatology, Jilin University, Changchun, 130021, P. R. China
| | - Junhu Zhang
- Joint Laboratory of Opto, Functional Theranostics in Medicine and Chemistry, The First Hospital of Jilin University, Changchun, 130021, P. R. China
- State Key Laboratory of Supramolecular Structure and Material, Center for Supramolecular Chemical Biology, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Bai Yang
- Joint Laboratory of Opto, Functional Theranostics in Medicine and Chemistry, The First Hospital of Jilin University, Changchun, 130021, P. R. China
- State Key Laboratory of Supramolecular Structure and Material, Center for Supramolecular Chemical Biology, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
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van der Velden AIM, IJpelaar DHT, Chandie Shaw PK, Pijl H, Vink H, van der Vlag J, Rabelink TJ, van den Berg BM. Role of dietary interventions on microvascular health in South-Asian Surinamese people with type 2 diabetes in the Netherlands: A randomized controlled trial. Nutr Diabetes 2024; 14:17. [PMID: 38600065 PMCID: PMC11006941 DOI: 10.1038/s41387-024-00275-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 03/25/2024] [Accepted: 04/03/2024] [Indexed: 04/12/2024] Open
Abstract
BACKGROUND/OBJECTIVES We investigated whether dietary interventions, i.e. a fasting mimicking diet (FMD, Prolon®) or glycocalyx mimetic supplementation (EndocalyxTM) could stabilize microvascular function in Surinamese South-Asian patients with type 2 diabetes (SA-T2DM) in the Netherlands, a patient population more prone to develop vascular complications. SUBJECTS/METHODS A randomized, placebo controlled, 3-arm intervention study was conducted in 56 SA-T2DM patients between 18 and 75 years old, for 3 consecutive months, with one additional follow up measurement 3 months after the last intervention. Sublingual microcirculation was assessed with SDF-imaging coupled to the GlycoCheckTM software, detecting red blood cell velocity, capillary density, static and dynamic perfused boundary region (PBR), and the overall microvascular health score (MVHS). Linear mixed models and interaction analysis were used to investigate the effects the interventions had on microvascular function. RESULTS Despite a temporal improvement in BMI and HbA1c after FMD the major treatment effect on microvascular health was worsening for RBC-velocity independent PBRdynamic, especially at follow-up. Glycocalyx supplementation, however, reduced urinary MCP-1 presence and improved both PBRdynamic and MVHSdynamic, which persisted at follow-up. CONCLUSIONS We showed that despite temporal beneficial changes in BMI and HbA1c after FMD, this intervention is not able to preserve microvascular endothelial health in Dutch South-Asian patients with T2DM. In contrast, glycocalyx mimetics preserves the microvascular endothelial health and reduces the inflammatory cytokine MCP-1. CLINICAL STUDY REGISTRATION NCT03889236.
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Affiliation(s)
- Anouk I M van der Velden
- Department of Internal Medicine (Nephrology), Leiden University Medical Center, Leiden, The Netherlands
- Einthoven Laboratory of Vascular and Regenerative Medicine, LUMC, Leiden, The Netherlands
| | - Daphne H T IJpelaar
- Department of Internal Medicine and Nephrology, Green Heart Hospital, Gouda, The Netherlands
| | - Prataap K Chandie Shaw
- Department of Internal Medicine and Nephrology, Haaglanden Medical Center, The Hague, The Netherlands
| | - Hanno Pijl
- Einthoven Laboratory of Vascular and Regenerative Medicine, LUMC, Leiden, The Netherlands
- Department of Internal Medicine (Endocrinology), LUMC, Leiden, The Netherlands
| | - Hans Vink
- Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht, The Netherlands
- MicroVascular Health Solutions LLC, Alpine, Utah, USA
| | - Johan van der Vlag
- Department of Nephrology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Ton J Rabelink
- Department of Internal Medicine (Nephrology), Leiden University Medical Center, Leiden, The Netherlands
- Einthoven Laboratory of Vascular and Regenerative Medicine, LUMC, Leiden, The Netherlands
| | - Bernard M van den Berg
- Department of Internal Medicine (Nephrology), Leiden University Medical Center, Leiden, The Netherlands.
- Einthoven Laboratory of Vascular and Regenerative Medicine, LUMC, Leiden, The Netherlands.
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Zan R, Wu Q, Chen Y, Wu G, Zhang H, Zhu L. Identification of Novel Dipeptidyl Peptidase-IV Inhibitory Peptides in Chickpea Protein Hydrolysates. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:8211-8219. [PMID: 37191584 DOI: 10.1021/acs.jafc.3c00603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Dipeptidyl peptidase-IV (DPP-IV) is one of the main targets for blood sugar control. Some food protein-derived peptides are thought to have DPP-IV inhibitory (DPP-IVi) activity. In this study, chickpea protein hydrolysates (CPHs) obtained through Neutrase hydrolysis for 60 min (CPHs-Pro-60) exhibited the highest DPP-IVi activity. DPP-IVi activity after simulated in vitro gastrointestinal digestion was maintained at >60%. Peptide libraries are established after the identification of peptide sequences. Molecular docking verified that the four screened peptides (AAWPGHPEF, LAFP, IAIPPGIPYW, and PPGIPYW) could bind to the active center of DPP-IV. Notably, IAIPPGIPYW exhibited the most potent DPP-IVi activity (half maximal inhibitory concentration (IC50): 12.43 μM). Both IAIPPGIPYW and PPGIPYW exhibited excellent DPP-IVi activity in Caco-2 cells. These results indicated that chickpea could be used as a source of natural hypoglycemic peptides for food and nutritional applications.
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Affiliation(s)
- Rong Zan
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Qiming Wu
- Nutrilite Health Institute, Shanghai 201203, China
| | - Yiling Chen
- Amway (China) Botanical R&D Center, Wuxi 214115, China
| | - Gangcheng Wu
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Hui Zhang
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Ling Zhu
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
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Zhang A, Wang K, Liu X, Zhang X. Isolation and identification of dipeptidyl peptidase-IV inhibitory peptides from Sacha inchi meal. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:2926-2938. [PMID: 36692392 DOI: 10.1002/jsfa.12464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 01/19/2023] [Accepted: 01/24/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUND Sacha inchi meal (SIM) is a by-product of oil processing. Our previous studies showed that SIM hydrolysates exhibited dipeptidyl peptidase-IV (DPP-IV) inhibition activity. The objective of the present work was to identify and characterize the bioactive peptides from protein hydrolysates of SIM; enzyme kinetics and peptide-enzyme interaction were also investigated. RESULTS From SIM hydrolysates, ten peptides responsible for the activity were identified: GPSRGF (GF-6), FPILSPDPA (FA-9), APYRRGGKI (AI-9), WPYH (WH-4), DPATWLALPT (DT-10), NPEDEFRQQ (NQ-9), APESKPVGV (AV-9), LEWRDR (LR-6), APVYWVQ (AQ-7) and LLMWPY (LY-6). The IC50 values of five peptides (GF-6, WH-4, AQ-7, AV-9 and LY-6) with better inhibitory activity on DPP-IV were within the range of 23.43-128.40 μmol L-1 . AQ-7 had the best activity, with an IC50 value of 23.43 μmol L-1 . Enzyme kinetics indicated the presence of various inhibition types (mixed, non-competitive and competitive). Isothermal titration microcalorimetry showed that the main forces of the binding sites between peptide (GF-6 or AQ-7) and DPP-IV were hydrogen bond, hydrophobic interaction and van der Waals force. The key residues involved in peptide-enzyme interaction were determined by molecular docking. Furthermore, at a concentration of 800 μmol L-1 , GF-6 was found to significantly increase the glucose consumption in insulin-resistant HepG2 cells (P < 0.05) compared with the model group. CONCLUSION Sacha inchi meal-derived peptides displayed potent DPP-IV inhibition activity and could be used in the health food industry and as lead compounds for diabetes therapy. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Aiyuan Zhang
- College of Food Science and Engineering, South China University of Technology, Guangzhou, China
| | - Kai Wang
- College of Food Science and Engineering, South China University of Technology, Guangzhou, China
| | - Xiaofei Liu
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang, China
| | - Xuewu Zhang
- College of Food Science and Engineering, South China University of Technology, Guangzhou, China
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Du Y, Gao L, Xiao X, Hou X, Ji L. A multicentre, randomized, double-blind, parallel, active- and placebo-controlled Phase 3 clinical study of the glucokinase activator PB-201 in treatment-naive patients with type 2 diabetes mellitus: A study protocol. Diabetes Obes Metab 2023; 25:649-655. [PMID: 36309971 DOI: 10.1111/dom.14909] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/28/2022] [Accepted: 10/28/2022] [Indexed: 02/04/2023]
Abstract
AIM To report the rationale for using PB-201, a partial glucokinase activator (GKA), for a Phase 3 study (NCT05102149) assessing its efficacy and safety in a Chinese population and to describe the design of this GKA Phase 3 trial, the first to involve both an active control and a placebo control arm. MATERIALS AND METHODS This is an ongoing, multicentre, randomized, double-blind, three-arm placebo and active control study to be carried out among 672 Chinese treatment-naive participants with type 2 diabetes mellitus (T2DM) to assess the efficacy and safety of PB-201 for approximately 60 weeks, including a screening period and a safety follow-up period. RESULTS The primary objective of this study was to monitor change in glycated haemoglobin levels with PB-201 in treatment-naive T2DM participants from baseline to 24 weeks in comparison with vildagliptin and placebo. The key secondary objective was to assess the efficacy and safety of PB-201 following treatment for a time period of 52 weeks. CONCLUSION This pivotal study will offer critical information regarding the efficacy and safety of PB-201 in Chinese treatment-naive T2DM participants that would help to establish robust evidence for the benefit-risk evaluation of this drug.
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Affiliation(s)
- Ying Du
- Clinical Develop Center, PegBio Co., Ltd, Suzhou, China
| | - Leili Gao
- Department of Endocrinology, Peking University People's Hospital, Beijing, China
| | - Xinhua Xiao
- Department of Endocrinology, Peking Union Medical College Hospital, Beijing, China
| | - Xin Hou
- Clinical Develop Center, PegBio Co., Ltd, Suzhou, China
| | - Linong Ji
- Department of Endocrinology, Peking University People's Hospital, Beijing, China
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Efficacy and Safety of Resveratrol Supplements on Blood Lipid and Blood Glucose Control in Patients with Type 2 Diabetes: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:5644171. [PMID: 34484395 PMCID: PMC8410426 DOI: 10.1155/2021/5644171] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 07/19/2021] [Indexed: 01/03/2023]
Abstract
Background Diabetes is a major public health concern. Resveratrol has shown great beneficial effects on hyperglycemia and insulin resistance and as an antioxidant. Methods We searched the Chinese and English databases (such as CNKI, PubMed, and Embase) and extracted data from randomized controlled trials (RCTs). Then, RevMan 5.3 was used for bias risk assessment and meta-analysis. The primary outcome indicators include insulin-resistance-related indicators and blood-lipid-related indicators. This systematic review and meta-analysis was registered in PROSPERO (CRD42018089521). Results Fifteen RCTs involving 896 patients were included. For insulin-resistance-related indicators, the summary results showed that, compared with the control group, homeostasis model assessment for insulin resistance (HOMA-IR) in the resveratrol group is lower (WMD: −0.99; 95% CI −1.61, −0.38; P=0.002). For blood-lipid-related indicators, the total cholesterol (TC) and triglyceride (TG) in the resveratrol group is of no statistical significance (for TC, WMD: −7.11; 95% CI −16.28, 2.06; P=0.13; for TG, WMD: −2.15; 95% CI −5.52, 1.22; P=0.21). For adverse events, the summary results showed that there was no statistical difference in the incidence of adverse events between the resveratrol and control groups (WMD: 2; 95% CI 0.44, 9.03; P=0.37). Conclusion Based on the current evidence, resveratrol may improve insulin resistance, lower fasting blood glucose and insulin levels, and improve oxidative stress in patients with type 2 diabetes mellitus.
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Efficacy and Safety of Curcumin Supplement on Improvement of Insulin Resistance in People with Type 2 Diabetes Mellitus: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:4471944. [PMID: 34484389 PMCID: PMC8410384 DOI: 10.1155/2021/4471944] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 07/20/2021] [Indexed: 12/26/2022]
Abstract
Background Diabetes is a major public health concern. In addition, there is some evidence to support curcumin as part of a diabetes treatment program. Methods Data from randomized controlled trials were obtained to assess the effects of curcumin versus placebo or western medicine in patients with type 2 diabetes mellitus (T2DM). The study's registration number is CRD42018089528. The primary outcomes included homeostasis model assessment-insulin resistance (HOMA-IR), glycosylated hemoglobin (HbAlc), total cholesterol (TC), and triglyceride (TG). Results Four trials involving 453 patients were included. The HOMA-IR of curcumin group is lower in Asia (WMD: -2.41, 95% CI: -4.44 to -0.39, P=0.02) and the Middle East subgroups (WMD: -0.60, 95% CI: -0.74 to -0.46, P < 0.00001). The HbAlc in the curcumin group is lower than that in the control group (WMD: -0.69; 95% CI: -0.91, -0.48; P < 0.0001). The TC and TG levels of the curcumin group are lower in the Asia subgroup (TC: WMD: -23.45, 95% CI: -40.04 to -6.84, P=0.006; TG: WMD: -54.14, 95% CI: -95.71 to -12.57, P=0.01), while in the Middle East the difference was of not statistically significant (TC: WMD: 22.91, 95% CI: -16.94 to 62.75, P=0.26; TG: WMD: -4.56, 95% CI: -19.28 to 10.16, P=0.54). Conclusion Based on the current evidence, curcumin may assist in improving the insulin resistance, glycemic control, and decreased TG and TC in patients with T2DM.
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Jeong H, Yang D, Zhao J, Seo JH, Shin DG, Cha JD, Lim CW, Kim JW, Kim B. Ethanol Extract of Orostachys japonicus A. Berger (Crassulaceae) Protects Against Type 2 Diabetes by Reducing Insulin Resistance and Hepatic Inflammation in Mice. J Med Food 2021; 24:464-478. [PMID: 34009023 DOI: 10.1089/jmf.2020.4790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Type 2 diabetes (T2D) is a threaten human health problem, and accompanied by hyperglycemia and disorder of insulin secretion, is a major cause of abnormalities in maintaining blood glucose homeostasis. Also, low-grade inflammation, as well as insulin resistance (IR), is a common feature in patients with T2D. Numerous causes of the outbreak of T2D have been suggested by researchers, who indicate that genetic background and epigenetic predisposition, such as overnutrition and deficient physical activity, hasten the promotion of T2D milieu. Orostachys japonicus A. Berger (O. japonicus) is a herbal and remedial plant whose various activities include hemostatic, antidotal, febrile, and anti-inflammatory. Hence, we designed to evaluate the antidiabetic efficacy of ethanol extracts of O. japonicus (OJE). Six-week-old C57BL/Ksj-db/db (db/db) mice were used. The results showed that mice given various concentrations of OJE (0, 50, 100, and 200 mg/kg per day) for 8 weeks showed significantly reduced hyperglycemia, IR, and liver injury, confirmed by measuring diabetic parameters, serum, and hepatic biochemicals. Furthermore, the treatment of OJE markedly decreased the mRNA levels of proinflammatory cytokines, lipid accumulation, and gluconeogenesis-related genes. Consistently, western blot analysis indicated that mice treated with OJE showed increased levels of phospho-c-Jun N-terminal kinase, phospho-Akt, glucose transporters 2 and 4 (GLUT2 and GLUT4) in T2D mice. Likewise, much the same results were obtained in in vitro experiments. Taken together, OJE had hopeful advantage in sustaining the glucose homeostasis and diminishing IR, and could be a safe alternative remedy for treating T2D.
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Affiliation(s)
- Hyuneui Jeong
- Biosafety Research Institute and Laboratory of Pathology (BK21 Plus Program), College of Veterinary Medicine, Jeonbuk National University, Iksan-si, Jeollabuk-do, Korea
| | - Daram Yang
- Biosafety Research Institute and Laboratory of Pathology (BK21 Plus Program), College of Veterinary Medicine, Jeonbuk National University, Iksan-si, Jeollabuk-do, Korea
| | - Jing Zhao
- Biosafety Research Institute and Laboratory of Pathology (BK21 Plus Program), College of Veterinary Medicine, Jeonbuk National University, Iksan-si, Jeollabuk-do, Korea
| | - Jeong Hun Seo
- Research & Development Center of General Bio Co., Ltd, Namwon-si, Jeollabuk-do, Korea
| | - Dong Gue Shin
- Research & Development Center of General Bio Co., Ltd, Namwon-si, Jeollabuk-do, Korea
| | - Jeong-Dan Cha
- Research & Development Center of General Bio Co., Ltd, Namwon-si, Jeollabuk-do, Korea
| | - Chae Woong Lim
- Biosafety Research Institute and Laboratory of Pathology (BK21 Plus Program), College of Veterinary Medicine, Jeonbuk National University, Iksan-si, Jeollabuk-do, Korea
| | - Jong-Won Kim
- Biosafety Research Institute and Laboratory of Pathology (BK21 Plus Program), College of Veterinary Medicine, Jeonbuk National University, Iksan-si, Jeollabuk-do, Korea
| | - Bumseok Kim
- Biosafety Research Institute and Laboratory of Pathology (BK21 Plus Program), College of Veterinary Medicine, Jeonbuk National University, Iksan-si, Jeollabuk-do, Korea
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Mäder P, Kattner L. Sulfoximines as Rising Stars in Modern Drug Discovery? Current Status and Perspective on an Emerging Functional Group in Medicinal Chemistry. J Med Chem 2020; 63:14243-14275. [DOI: 10.1021/acs.jmedchem.0c00960] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Patrick Mäder
- Endotherm GmbH, Science Park 2, 66123 Saarbruecken, Germany
| | - Lars Kattner
- Endotherm GmbH, Science Park 2, 66123 Saarbruecken, Germany
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Parhi R, Mandru A. Enhancement of skin permeability with thermal ablation techniques: concept to commercial products. Drug Deliv Transl Res 2020; 11:817-841. [PMID: 32696221 PMCID: PMC7372979 DOI: 10.1007/s13346-020-00823-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Traditionally, the skin is considered as a protective barrier which acts as a highly impermeable region of the human body. But in recent times, it is recognized as a specialized organ that aids in the delivery of a wide range of drug molecules into the skin (intradermal drug delivery) and across the skin into systemic circulation (transdermal drug delivery, TDD). The bioavailability of a drug administered transdermally can be improved by several penetration enhancement techniques, which are broadly classified into chemical and physical techniques. Application of mentioned techniques together with efforts of various scientific and innovative companies had made TDD a multibillion dollar market and an average of 2.6 new transdermal drugs are being approved each year. Out of various techniques, the thermal ablation techniques involving chemicals, heating elements, lasers, and radiofrequency (RF) are proved to be more effective in terms of delivering the drug across the skin by disrupting the stratum corneum (SC). The reason behind it is that the thermal ablation technique resulted in improved bioavailability, quick treatment and fast recovery of the SC, and more importantly it does not cause any damage to underlying dermis layer. This review article mainly discussed about various thermal ablation techniques with commercial products and patents in each classes, and their safety aspects. This review also briefly presented anatomy of the skin, penetration pathways across the skin, and different generations of TDD. Graphical abstract ![]()
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Affiliation(s)
- Rabinarayan Parhi
- Department of Pharmaceutical Sciences, Susruta School of Medical and Paramedical Sciences, Assam University (A Central University), Silchar, Assam, 788011, India.
| | - Aishwarya Mandru
- GITAM Institute of Pharmacy, Gandhi Institute of Technology and Management (GITAM), Deemed to be University, Gandhi Nagar Campus, Rushikonda, Visakhapatnam, Andhra Pradesh, 530045, India
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Tiwari P, Katyal A, Khan MF, Ashraf GM, Ahmad K. Lead Optimization Resources in Drug Discovery for Diabetes. Endocr Metab Immune Disord Drug Targets 2020; 19:754-774. [PMID: 30834844 DOI: 10.2174/1871530319666190304121826] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 12/27/2018] [Accepted: 01/05/2019] [Indexed: 12/25/2022]
Abstract
BACKGROUND Diabetes, defined as a chronic metabolic syndrome, exhibits global prevalence and phenomenal rise worldwide. The rising incidence accounts for a global health crisis, demonstrating a profound effect on low and middle-income countries, particularly people with limited healthcare facilities. METHODS Highlighting the prevalence of diabetes and its socio-economic implications on the population across the globe, the article aimed to address the emerging significance of computational biology in drug designing and development, pertaining to identification and validation of lead molecules for diabetes treatment. RESULTS The drug discovery programs have shifted the focus on in silico prediction strategies minimizing prolonged clinical trials and expenses. Despite technological advances and effective drug therapies, the fight against life-threatening, disabling disease has witnessed multiple challenges. The lead optimization resources in computational biology have transformed the research on the identification and optimization of anti-diabetic lead molecules in drug discovery studies. The QSAR approaches and ADMET/Toxicity parameters provide significant evaluation of prospective "drug-like" molecules from natural sources. CONCLUSION The science of computational biology has facilitated the drug discovery and development studies and the available data may be utilized in a rational construction of a drug 'blueprint' for a particular individual based on the genetic organization. The identification of natural products possessing bioactive properties as well as their scientific validation is an emerging prospective approach in antidiabetic drug discovery.
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Affiliation(s)
- Pragya Tiwari
- Department of Biotechnology, MG Institute of Management and Technology, Lucknow-Kanpur Road, Lucknow, India
| | - Ashish Katyal
- Department of Biotechnology, Meerut Institute of Engineering and Technology, Meerut, India
| | - Mohd F Khan
- Department of Biotechnology, Utkarsh School of Management and Technology, Bareilly, India.,Department of Plant Science, MJP Rohilkhand University, Bareilly, India
| | - Ghulam Md Ashraf
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia.,Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Khurshid Ahmad
- Department of Medical Biotechnology, Yeungnam University, Gyeongsan, Korea
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Moens C, Bensellam M, Himpe E, Muller CJF, Jonas JC, Bouwens L. Aspalathin Protects Insulin-Producing β Cells against Glucotoxicity and Oxidative Stress-Induced Cell Death. Mol Nutr Food Res 2020; 64:e1901009. [PMID: 32012427 DOI: 10.1002/mnfr.201901009] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 12/23/2019] [Indexed: 12/17/2022]
Abstract
SCOPE Aspalathin, the main polyphenolic phytochemical of rooibos (Aspalathus linearis), has been attributed with health promoting properties, including a glucose lowering effect that can prove interesting for application as nutraceutical or therapeutic in (pre-)diabetics. Preservation of β cell mass in the pancreas is considered a key issue for diabetes prevention or treatment, therefore the aim is to investigate whether aspalathin also has β cell cytoprotective potential. METHODS AND RESULTS Rat pancreatic islets and the β cell line Insulinoma 1E (INS1E) are studied in vitro after exposure to various cytotoxic agents, namely streptozotocin (STZ), hydrogen peroxide, or chronic high glucose. The effect of aspalathin on cell survival and apoptosis is studied. Expression of relevant cytoprotective genes is analyzed by qRT-PCR and proteins by Western blot. Aspalathin is found to protect β cells against cytotoxicity and apoptosis. This is associated with increased translocation of nuclear factor erythroid 2-related factor 2 (NRF2) and expression of its antioxidant target genes heme oxygenase 1 (Hmox1), NAD(P)H quinone dehydrogenase 1 (Nqo-1), and superoxide dismutase 1 (Sod1). CONCLUSION It is proposed that aspalathin protects β cells against glucotoxicity and oxidative stress by increasing the expression of NRF2-regulated antioxidant enzymes. This indicates that aspalathin is an interesting β cell cytoprotectant.
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Affiliation(s)
- Céline Moens
- Cell Differentiation Lab, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Jette, Brussels, Belgium
| | - Mohammed Bensellam
- Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Pôle d'Endocrinologie, Diabète et Nutrition, Avenue Hippocrate 55, 1200 Brussels, Brussels, Belgium
| | - Eddy Himpe
- Cell Differentiation Lab, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Jette, Brussels, Belgium
| | - Christo J F Muller
- Biomedical Research and Innovation Platform, South African Medical Research Council, Francie van Zijl Drive, 7505, Western Cape, Tygerberg, South Africa
| | - Jean-Christophe Jonas
- Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Pôle d'Endocrinologie, Diabète et Nutrition, Avenue Hippocrate 55, 1200 Brussels, Brussels, Belgium
| | - Luc Bouwens
- Cell Differentiation Lab, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Jette, Brussels, Belgium
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Jha P, Kumari S, Jobby R, Desai N, Ali A. Dietary Phytonutrients in the Prevention of Diabetes-related Complications. Curr Diabetes Rev 2020; 16:657-673. [PMID: 31490762 DOI: 10.2174/1573399815666190906151319] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 07/11/2019] [Accepted: 08/26/2019] [Indexed: 02/02/2023]
Abstract
BACKGROUND The increasing prevalence of reported cases of diabetes has evidently become a major global public health concern. Although diabetes management is possible by the administration of synthetic anti-diabetic agents, there are profound side-effects associated with their long-term usage. Hence there is a demand for safer alternatives which could be possibly formulated using specific yet common phytonutrients. OBJECTIVES The main objective of this review is to describe the cellular mechanisms of phytonutrients as an alternative to commercially available synthetic anti-diabetic agents in the management of diabetes and related complications. Furthermore, the clinical evidence that supports this view is also highlighted. METHODOLOGY An in-depth review of published literature was carried out to identify the most promising phytonutrients in the management of diabetes and related complications. RESULTS A number of phytonutrients are reported to be potential anti-diabetic agents. Few examples include biguanides, resveratrol, lycopene, thymoquinone and quercetin. However, suitable formulations using these phytonutrients and their clinical trials are still underway. Most of the reported findings focus on one aspect of several biochemical processes e.g. enhancement of glucose utilization, antioxidation, induction of insulin production, antiglycation, etc. An in-depth study of phytonutrients with respect to functional, immunological as well as biochemical factors suggesting their efficacy, as well as safety in the management of diabetes, is rarely reported. CONCLUSION Our study thus highlights the abundance of clinical evidence of the efficiency of phytonutrients, and at the same time, the scarcity of clinically approved and marketed phytonutrients, as drugs, for the management of diabetes and related complications.
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Affiliation(s)
- Pamela Jha
- Amity School of Biotechnology, Amity University Mumbai, Pune Expressway, Bhatan Post, Somathne, Panvel, Mumbai, Maharashtra, India
| | - Sonit Kumari
- Amity School of Biotechnology, Amity University Mumbai, Pune Expressway, Bhatan Post, Somathne, Panvel, Mumbai, Maharashtra, India
| | - Renitta Jobby
- Amity School of Biotechnology, Amity University Mumbai, Pune Expressway, Bhatan Post, Somathne, Panvel, Mumbai, Maharashtra, India
| | - Nitin Desai
- Amity School of Biotechnology, Amity University Mumbai, Pune Expressway, Bhatan Post, Somathne, Panvel, Mumbai, Maharashtra, India
| | - Ahmad Ali
- Department of Life Sciences, University of Mumbai, Vidyanagari, Santacruz (East), Mumbai, Maharashtra, India
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Hevey R. Bioisosteres of Carbohydrate Functional Groups in Glycomimetic Design. Biomimetics (Basel) 2019; 4:E53. [PMID: 31357673 PMCID: PMC6784292 DOI: 10.3390/biomimetics4030053] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 07/25/2019] [Accepted: 07/26/2019] [Indexed: 02/07/2023] Open
Abstract
The aberrant presentation of carbohydrates has been linked to a number of diseases, such as cancer metastasis and immune dysregulation. These altered glycan structures represent a target for novel therapies by modulating their associated interactions with neighboring cells and molecules. Although these interactions are highly specific, native carbohydrates are characterized by very low affinities and inherently poor pharmacokinetic properties. Glycomimetic compounds, which mimic the structure and function of native glycans, have been successful in producing molecules with improved pharmacokinetic (PK) and pharmacodynamic (PD) features. Several strategies have been developed for glycomimetic design such as ligand pre-organization or reducing polar surface area. A related approach to developing glycomimetics relies on the bioisosteric replacement of carbohydrate functional groups. These changes can offer improvements to both binding affinity (e.g., reduced desolvation costs, enhanced metal chelation) and pharmacokinetic parameters (e.g., improved oral bioavailability). Several examples of bioisosteric modifications to carbohydrates have been reported; this review aims to consolidate them and presents different possibilities for enhancing core interactions in glycomimetics.
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Affiliation(s)
- Rachel Hevey
- Molecular Pharmacy, Department Pharmaceutical Sciences, University of Basel, Klingelbergstr. 50, 4056 Basel, Switzerland.
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Varanko AK, Chilkoti A. Molecular and Materials Engineering for Delivery of Peptide Drugs to Treat Type 2 Diabetes. Adv Healthc Mater 2019; 8:e1801509. [PMID: 30762299 DOI: 10.1002/adhm.201801509] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 01/11/2019] [Indexed: 01/06/2023]
Abstract
Type 2 diabetes is exploding globally. Despite numerous treatment options, nearly half of type 2 diabetics are unsuccessful at properly managing the disease, primarily due to a lack of patient compliance, driven by adverse side effects as well as complicated and frequent dosing schedules. Improving the delivery of type 2 diabetes drugs has the potential to increase patient compliance and thus, greatly enhance health outcomes and quality of life. This review focuses on molecular and materials engineering strategies that have been implemented to improve the delivery of peptide drugs to treat type 2 diabetes. Peptide drugs benefit from high potency and specificity but suffer from instability and short half-lives that limit their utility as therapeutics and pose a significant delivery challenge. Several approaches have been developed to improve the availability and efficacy of antidiabetic peptides and proteins in vivo. These methods are reviewed herein and include devices, which sustain the release of peptides in long term, and molecular engineering strategies, which prolong circulation time and slow the release of therapeutic peptides. By optimizing the delivery of these peptides and proteins using these approaches, long-term glucose control can be achieved in type 2 diabetes patients.
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Affiliation(s)
| | - Ashutosh Chilkoti
- Department of Biomedical Engineering Duke University Durham NC 27708 USA
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17
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Anti-diabetic activity of PUFAs-rich extracts of Chlorella pyrenoidosa and Spirulina platensis in rats. Food Chem Toxicol 2019; 128:233-239. [DOI: 10.1016/j.fct.2019.04.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/10/2019] [Accepted: 04/11/2019] [Indexed: 12/14/2022]
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Effect of Food on the Pharmacokinetics of Gliclazide 60 mg Modified Release Tablet in Healthy Caucasian Volunteers. ACTA MEDICA MARISIENSIS 2018. [DOI: 10.2478/amma-2018-0022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
Objective: To evaluate the food effect on glicazide disposition in clinical trials conducted on healthy Caucasian volunteers who were given a new modified release oral formulation of Gliclazide 60 mg developed by Sun Pharmaceutical Industries, India.
Methods: The studies were designed as open-label, randomized, single-dose, crossover studies that consisted of two periods. During each study, venous blood samples were taken before and after drug administration up to 96 hours. Subsequently, individual plasma profiles were determined and non-compartmental method was employed for the assessment of food effect on the pharmacokinetic profile of gliclazide. The statistical significance of differences for the main pharmacokinetic parameters was evaluated by ANOVA test, for p < 0.05 statistical significance was decided. The relative profiles of absorption of gliclazide were obtained by mathematical deconvolution. All calculation were performed by Phoenix WinNonlin®.
Results: High-fat, high-calorie meal decreased gliclazide exposure. The mean maximum plasma concentration decreased with 14%, while the mean total area under the plasma concentration-time profile registered a 17% decrease. The elimination half-lives under fasted and fed conditions were comparable and the time to maximum plasma concentration was shortened under fed condition. Safety evaluation showed that overall gliclazide was well tolerated under both fasted and fed condition.
Conclusions: The statistical analysis revealed the lack of food effect on the new modified release tablets of Gliclazide 60 mg. However, before stating a definite conclusion regarding the food effect on gliclazide pharmacokinetic profile, additional studies on patients with type 2 diabetes mellitus should be conducted.
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Antidiabetic Activity of Picris japonica Thunb Aqueous Extract in Diabetic KK-A y Mice. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 2018:1298030. [PMID: 30538754 PMCID: PMC6260539 DOI: 10.1155/2018/1298030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 07/08/2018] [Accepted: 11/01/2018] [Indexed: 12/04/2022]
Abstract
Objective To evaluate the hypoglycemic effect of Picris japonica Thunb (Asteraceae) on KK-Ay mice. Methods The hypoglycemic effect of Picris japonica aqueous extract (PJE) in a spontaneous type 2 diabetic model (KK-Ay mice) was studied in the present research. PJE was administrated at doses of 700 mg/kg and 350 mg/kg (calculated as crude herb) for 14 days and blood glucose, oral glucose tolerance test, plasma insulin level, and blood lipid were evaluated. Meanwhile, Rosiglitazone was used for the positive control. Results It was found the PJE treatment significantly reduced blood glucose level and improved oral glucose tolerance ability (p < 0.01 or p < 0.05) in a dose-dependent manner compared to the control diabetic mice. The blood insulin levels were significantly reduced in PJE-treated mice (700 mg/kg) and Rosiglitazone compared with the diabetic control (p < 0.01). Compared with the control diabetic group, the serum total cholesterol, triglyceride, and low density lipoprotein cholesterol were reduced by PJE (700 mg/kg) and Rosiglitazone (p < 0.05), and the serum high density lipoprotein cholesterol was significantly increased only by Rosiglitazone (p < 0.01). Conclusions The findings demonstrate that Picris japonica has remarkable antidiabetic effect in diabetic KK-Ay mice, which suggests that Picris japonica may be beneficial to the treatment of type 2 diabetes mellitus.
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20
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Hydrogen sulfide in the regulation of insulin secretion and insulin sensitivity: Implications for the pathogenesis and treatment of diabetes mellitus. Biochem Pharmacol 2018; 149:60-76. [DOI: 10.1016/j.bcp.2018.01.004] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 01/02/2018] [Indexed: 01/04/2023]
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Rouzbehan S, Moein S, Homaei A, Moein MR. Kinetics of α-glucosidase inhibition by different fractions of three species of Labiatae extracts: a new diabetes treatment model. PHARMACEUTICAL BIOLOGY 2017; 55:1483-1488. [PMID: 28367665 PMCID: PMC7011978 DOI: 10.1080/13880209.2017.1306569] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
CONTEXT Glucosidases are a group of enzymes playing crucial roles in digestion of carbohydrates. Glucosidase inhibitors can reduce carbohydrate digestion rate and have the potential to prevent development of type 2 diabetes. The Labiatae is one of the largest plant families grown globally and many studies that have isolated new pharmaceutical compounds. In folk medicine, some of Labiatae plants such as Zataria multiflora Boiss, Salvia mirzayanii Rech. F. & Esfand, and Otostegia persica Boiss are consumed for the treatment of diabetes. OBJECTIVES This study investigates the inhibitory effects of different fractions of three mentioned species extracts on α-glucosidase. MATERIALS AND METHODS Ethanol extracts of these plants leaves were fractionated using petroleum ether, chloroform, ethyl acetate, and n-butanol solutions. The duration of this study was 12 months. To measure enzyme inhibition, 5 μL of the enzyme, 20 μL of substrate and samples were used and for evaluation mode of inhibition, constant amounts of α-glucosidase were incubated with rising concentrations of substrate (PNPG). RESULTS The results revealed that the ethyl acetate fraction of Zataria multiflora (IC50 = 0.35 ± 0.01 mg/mL) and petroleum ether fraction of Salvia mirzayanii (IC50 = 0.4 ± 0.11 mg/mL) were the most potent inhibitors of α-glucosidase in comparison with the other samples and acarbose as the standard (IC50 = 7 ± 0.19 mg/mL). All of the samples exhibited noncompetitive-uncompetitive inhibition. DISCUSSION AND CONCLUSION It can be inferred from this study that α-glucosidase inhibitory potential of the studied extracts may be a marker of antidiabetic potential of these extracts.
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Affiliation(s)
- Sahere Rouzbehan
- Molecular Medicine Research Center, Hormozgan Health Institute, Hormozgan University of Medical Sciences, Bandar Abbas, IR Iran
- Biochemistry Department, Faculty of Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, IR Iran
| | - Soheila Moein
- Molecular Medicine Research Center, Hormozgan Health Institute, Hormozgan University of Medical Sciences, Bandar Abbas, IR Iran
- Biochemistry Department, Faculty of Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, IR Iran
- CONTACT Soheila MoeinDepartment of Biochemistry, Faculty of Medicine, Hormozgan University of Medical Sciences, P.O: 791969-3116, Bandar Abbas, IR Iran
| | - Ahmad Homaei
- Department of Biochemistry, Faculty of Science, University of Hormozgan, Bandar Abbas, IR Iran
| | - Mahmood Reza Moein
- Medicinal Plants Processing Research Center, Shiraz University of Medical Sciences, Shiraz, IR Iran
- Department of Pharmacognosy, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, IR Iran
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Rapid Identification of Dipeptidyl Peptidase-IV (DPP-IV) Inhibitory Peptides from Ruditapes philippinarum Hydrolysate. Molecules 2017; 22:molecules22101714. [PMID: 29027968 PMCID: PMC6151561 DOI: 10.3390/molecules22101714] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/08/2017] [Accepted: 10/09/2017] [Indexed: 01/08/2023] Open
Abstract
Dipeptidyl peptidase-IV (DPP-IV) inhibitory peptides were rapidly identified from Ruditapes philippinarum hydrolysate. The hydrolysate was fractionated by ethanol precipitation and preparative reverse phase high-performance liquid chromatography (RP-HPLC). The fraction which showed the highest DPP-IV inhibitory activity was then analyzed by a high-throughput nano-liquid chromatography electrospray ionization tandem mass spectrometry (nano-LC ESI-MS/MS) method, and the sequences of peptides were identified based on the MS/MS spectra against the Mollusca protein data from the UniProt database. In total, 50 peptides were identified. Furthermore, molecular docking was used to identify potential DPP-IV inhibitors from the identified peptides. Docking results suggested that four peptides: FAGDDAPR, LAPSTM, FAGDDAPRA, and FLMESH, could bind pockets of DPP-IV through hydrogen bonds, π-π bonds, and charge interactions. The four peptides were chemically synthesized and tested for DPP-IV inhibitory activity. The results showed that they possessed DPP-IV inhibitory activity with IC50 values of 168.72 μM, 140.82 μM, 393.30 μM, and >500 μM, respectively. These results indicate that R. philippinarum-derived peptides may have potential as functional food ingredients for the prevention of diabetes.
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Stana A, Vodnar DC, Tamaian R, Pîrnău A, Vlase L, Ionuț I, Oniga O, Tiperciuc B. Design, Synthesis and Antifungal Activity Evaluation of New Thiazolin-4-ones as Potential Lanosterol 14α-Demethylase Inhibitors. Int J Mol Sci 2017; 18:ijms18010177. [PMID: 28106743 PMCID: PMC5297809 DOI: 10.3390/ijms18010177] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 01/06/2017] [Accepted: 01/09/2017] [Indexed: 12/19/2022] Open
Abstract
Twenty-three thiazolin-4-ones were synthesized starting from phenylthioamide or thiourea derivatives by condensation with α-monochloroacetic acid or ethyl α-bromoacetate, followed by substitution in position 5 with various arylidene moieties. All the synthesized compounds were physico-chemically characterized and the IR (infrared spectra), ¹H NMR (proton nuclear magnetic resonance), 13C NMR (carbon nuclear magnetic resonance) and MS (mass spectrometry) data were consistent with the assigned structures. The synthesized thiazolin-4-one derivatives were tested for antifungal properties against several strains of Candida and all compounds exhibited efficient anti-Candida activity, two of them (9b and 10) being over 500-fold more active than fluconazole. Furthermore, the compounds' lipophilicity was assessed and the compounds were subjected to in silico screening for prediction of their ADME-Tox properties (absorbtion, distribution, metabolism, excretion and toxicity). Molecular docking studies were performed to investigate the mode of action towards the fungal lanosterol 14α-demethylase, a cytochrome P450-dependent enzyme. The results of the in vitro antifungal activity screening, docking study and ADME-Tox prediction revealed that the synthesized compounds are potential anti-Candida agents that might act by inhibiting the fungal lanosterol 14α-demethylase and can be further optimized and developed as lead compounds.
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Affiliation(s)
- Anca Stana
- Department of Pharmaceutical Chemistry, "Iuliu Hațieganu" University of Medicine and Pharmacy, 41 Victor Babeș Street, RO-400012 Cluj-Napoca, Romania.
| | - Dan C Vodnar
- Department of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3-5 Manăştur Street, RO-400372 Cluj-Napoca, Romania.
| | - Radu Tamaian
- National Institute for Research and Development for Cryogenic and Isotopic Technologies, 4th Uzinei Street, RO-240050 Râmnicu Vâlcea, Romania.
- SC Biotech Corp SRL, 4th Uzinei Street, RO-240050 Râmnicu Vâlcea, Romania.
| | - Adrian Pîrnău
- National Institute for Research and Development of Isotopic and Molecular Technologies, RO-400293 Cluj-Napoca, Romania.
| | - Laurian Vlase
- Department of Pharmaceutical Technology and Biopharmaceutics, "Iuliu Hațieganu" University of Medicine and Pharmacy, 41 Victor Babeș Street, RO-400012 Cluj-Napoca, Romania.
| | - Ioana Ionuț
- Department of Pharmaceutical Chemistry, "Iuliu Hațieganu" University of Medicine and Pharmacy, 41 Victor Babeș Street, RO-400012 Cluj-Napoca, Romania.
| | - Ovidiu Oniga
- Department of Pharmaceutical Chemistry, "Iuliu Hațieganu" University of Medicine and Pharmacy, 41 Victor Babeș Street, RO-400012 Cluj-Napoca, Romania.
| | - Brînduşa Tiperciuc
- Department of Pharmaceutical Chemistry, "Iuliu Hațieganu" University of Medicine and Pharmacy, 41 Victor Babeș Street, RO-400012 Cluj-Napoca, Romania.
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Sneha P, Doss CGP. Gliptins in managing diabetes - Reviewing computational strategy. Life Sci 2016; 166:108-120. [PMID: 27744054 DOI: 10.1016/j.lfs.2016.10.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 10/05/2016] [Accepted: 10/11/2016] [Indexed: 12/12/2022]
Abstract
The pace of anti-diabetic drug discovery is very slow in spite of increasing rate of prevalence of Type 2 Diabetes which remains a major public health concern. Though extensive research steps are taken in the past decade, yet craves for better new treatment strategies to overcome the current scenario. One such general finding is the evolution of gliptins which discriminately inhibits DPP4 (Dipeptidyl peptidase-4) enzyme. Although the mechanism of action of gliptin is highly target oriented and accurate, still its long-term use stands unknown. This step calls for a fast, flexible, and cost-effective strategies to meet the demands of producing arrays of high-content lead compounds with improved efficiency for better clinical success. The present review highlights the available gliptins in the market and also other naturally occurring DPP4 enzyme inhibitors. Along with describing the known inhibitors and their origin in this review, we attempted to identify a probable new lead compounds using advanced computational techniques. In this context, computational methods that integrate the knowledge of proteins and drug responses were utilized in prioritizing targets and designing drugs towards clinical trials with better efficacy. The compounds obtained as a result of virtual screening were compared with the commercially available gliptin in the market to have better efficiency in the identification and validation of the potential DPP4 inhibitors. The combinatorial computational methods used in the present study identified Compound 1: 25022354 as promising inhibitor.
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Affiliation(s)
- P Sneha
- School of Biosciences and Technology, VIT University, Vellore, Tamil Nadu 632014, India
| | - C George Priya Doss
- School of Biosciences and Technology, VIT University, Vellore, Tamil Nadu 632014, India.
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Wang J, Li F, Ma C. Recent progress in designing inhibitors that target the drug-resistant M2 proton channels from the influenza A viruses. Biopolymers 2016; 104:291-309. [PMID: 25663018 DOI: 10.1002/bip.22623] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 01/24/2015] [Indexed: 12/15/2022]
Abstract
Influenza viruses are the causative agents for seasonal influenza, which results in thousands of deaths and millions of hospitalizations each year. Moreover, sporadic transmission of avian or swan influenza viruses to humans often leads to an influenza pandemic, as there is no preimmunity in the human body to fight against such novel strains. The metastable genome of the influenza viruses, coupled with the reassortment of different strains from a wide range of host origins, leads to the continuous evolution of the influenza virus diversity. Such characteristics of influenza viruses present a grand challenge in devising therapeutic strategies to combat influenza virus infection. This review summarizes recent progress in designing small molecule inhibitors that target the drug-resistant influenza A virus M2 proton channels and highlights the contribution of mechanistic studies of proton conductance to drug discovery. The lessons learned throughout the course of M2 drug discovery might provide insights for designing inhibitors that target other therapeutically important ion channels.
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Affiliation(s)
- Jun Wang
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721.,BIO5 Institute, University of Arizona, Tucson, AZ, 85721
| | - Fang Li
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721
| | - Chunlong Ma
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721
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Ghosal S, Sinha B, Gangopadhyay KK. Insulin glargine versus insulin degludec in patients failing on oral therapy in type 2 diabetes: A retrospective real world comparative data from India. Diabetes Metab Syndr 2016; 10:161-165. [PMID: 26822462 DOI: 10.1016/j.dsx.2016.01.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 01/09/2016] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To compare the changes in various glycemic parameters in insulin-naïve type 2 diabetes mellitus (DM) patients who were initiated on insulin glargine or insulin degludec in a real world setting. METHODS Retrospective data were analyzed in consecutive type 2 DM patients in a real world setting, who failed oral therapy (at least 2 oral anti-diabetic drugs) and were initiated with either insulin glargine or insulin degludec. The parameters assessed were the changes in HbA1c, fasting plasma glucose, body weight, dose of Insulin and the total number of patient reported hypoglycemic episodes up to 6 months after initiation. RESULT At baseline, insulin glargine and insulin degludec groups were similar in terms of gender, age, weight, HbA1c and duration of diabetes. After 6 months follow up the change in HbA1c (-1.09 versus -1.45 P=0.124), change in FPG (-72.81mg/dl [-4mmol/L] versus -75.88mg/dl [-4.2mmol/L] P=0.755), and the change in body weight (+1.65 versus +0.85 P=0.082) were similar in glargine and degludec groups, respectively. Patients in insulin degludec group experienced significantly lesser patient reported hypoglycemic episodes (12 versus 40) and required significantly lesser dose (25.68Units versus 18.61Units per day; P=0.002) compared to insulin glargine. 41% of the patients reached HbA1C target of ≤7% with insulin glargine compared to 69% with insulin degludec within the specified time period. CONCLUSION Results from this real world analysis suggest that among type 2 DM patients who were initiated on insulin degludec as compared to insulin glargine may be associated with significantly lesser patient reported hypoglycemic episodes and lesser dose of insulin while achieving similar glycemic control. This study is however limited by the retrospective nature of the data collection.
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Affiliation(s)
| | - Binayak Sinha
- Department of Endocrinology, AMRI Hospital, Salt Lake, Kolkata, India.
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Wang J, Lu CS, Liu DY, Xu YT, Zhu Y, Wu HH. Constituents from Polygonatum sibiricum and their inhibitions on the formation of advanced glycosylation end products. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2016; 18:697-704. [PMID: 26841079 DOI: 10.1080/10286020.2015.1135905] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Accepted: 12/21/2015] [Indexed: 06/05/2023]
Abstract
A new saponin, isonarthogenin 3-O-β-d-glucopyranosyl-(1→4)-β-d-galactopyranoside (1), together with twelve known compounds, were isolated from the rhizomes of Polygonatum sibiricum. The structures of these compounds were elucidated by analysis of their 1D/2D NMR and MS data. Among them, phenol compounds 4-7 and 9-10 showed significant inhibitions against the formation of advanced glycosylation end products, with IC50 values of 0.091 ± 0.0021, 0.10 ± 0.041, 0.014 ± 0.0027, 0.11 ± 0.011, 0.13 ± 0.045, and 0.055 ± 0.019 μM, respectively. The results will promote exploiting potential medicinal use of these compounds in the prevention of diabetic complications and supporting Polygonatum sibiricum as a functional food for healthy and medicinal diet.
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Affiliation(s)
- Juan Wang
- a Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin Key Laboratory of TCM Chemistry and Analysis , Tianjin University of Traditional Chinese Medicine , Tianjin , 300457 , China
- b Research and Development Center of TCM , Tianjin International Joint Academy of Biotechnology & Medicine , Tianjin , 300457 , China
| | - Cheng-Shu Lu
- a Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin Key Laboratory of TCM Chemistry and Analysis , Tianjin University of Traditional Chinese Medicine , Tianjin , 300457 , China
- b Research and Development Center of TCM , Tianjin International Joint Academy of Biotechnology & Medicine , Tianjin , 300457 , China
| | - Dong-Yan Liu
- b Research and Development Center of TCM , Tianjin International Joint Academy of Biotechnology & Medicine , Tianjin , 300457 , China
| | - Yan-Tong Xu
- a Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin Key Laboratory of TCM Chemistry and Analysis , Tianjin University of Traditional Chinese Medicine , Tianjin , 300457 , China
- b Research and Development Center of TCM , Tianjin International Joint Academy of Biotechnology & Medicine , Tianjin , 300457 , China
| | - Yan Zhu
- a Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin Key Laboratory of TCM Chemistry and Analysis , Tianjin University of Traditional Chinese Medicine , Tianjin , 300457 , China
- b Research and Development Center of TCM , Tianjin International Joint Academy of Biotechnology & Medicine , Tianjin , 300457 , China
| | - Hong-Hua Wu
- a Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin Key Laboratory of TCM Chemistry and Analysis , Tianjin University of Traditional Chinese Medicine , Tianjin , 300457 , China
- b Research and Development Center of TCM , Tianjin International Joint Academy of Biotechnology & Medicine , Tianjin , 300457 , China
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Casanova LM, Espíndola-Netto JM, Tinoco LW, Sola-Penna M, Costa SS. The Use of NMR Metabolite Profiling andin vivoHypoglycemic Assay for Comparison of Unfractionated Aqueous Leaf Extracts of TwoOcimumSpecies. Chem Biodivers 2016; 13:686-94. [DOI: 10.1002/cbdv.201500180] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Accepted: 01/05/2016] [Indexed: 12/22/2022]
Affiliation(s)
- Livia Marques Casanova
- Laboratório de Química de Produtos Naturais Bioativos - LPN-Bio; Instituto de Pesquisas de Produtos Naturais; Universidade Federal do Rio de Janeiro; Rio de Janeiro 21941-902 RJ Brazil
| | - Jair Machado Espíndola-Netto
- Laboratório de Enzimologia e Controle do Metabolismo - LabECoM; Faculdade de Farmácia; Universidade Federal do Rio de Janeiro; Rio de Janeiro 21941-902 RJ Brazil
| | - Luzineide Wanderley Tinoco
- Laboratório Multiusuário de Análises por RMN - LAMAR; Instituto de Pesquisas de Produtos Naturais; Universidade Federal do Rio de Janeiro; Rio de Janeiro 21941-902 RJ Brazil
| | - Mauro Sola-Penna
- Laboratório de Enzimologia e Controle do Metabolismo - LabECoM; Faculdade de Farmácia; Universidade Federal do Rio de Janeiro; Rio de Janeiro 21941-902 RJ Brazil
| | - Sônia Soares Costa
- Laboratório de Química de Produtos Naturais Bioativos - LPN-Bio; Instituto de Pesquisas de Produtos Naturais; Universidade Federal do Rio de Janeiro; Rio de Janeiro 21941-902 RJ Brazil
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29
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Modification on the O-glucoside of Sergliflozin-A: A new strategy for SGLT2 inhibitor design. Bioorg Med Chem Lett 2016; 26:2170-3. [DOI: 10.1016/j.bmcl.2016.03.065] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 03/14/2016] [Accepted: 03/16/2016] [Indexed: 01/04/2023]
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Chung BL, Toth MJ, Kamaly N, Sei YJ, Becraft J, Mulder WJM, Fayad ZA, Farokhzad OC, Kim Y, Langer R. Nanomedicines for Endothelial Disorders. NANO TODAY 2015; 10:759-776. [PMID: 26955397 PMCID: PMC4778260 DOI: 10.1016/j.nantod.2015.11.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The endothelium lines the internal surfaces of blood and lymphatic vessels and has a critical role in maintaining homeostasis. Endothelial dysfunction is involved in the pathology of many diseases and conditions, including disorders such as diabetes, cardiovascular diseases, and cancer. Given this common etiology in a range of diseases, medicines targeting an impaired endothelium can strengthen the arsenal of therapeutics. Nanomedicine - the application of nanotechnology to healthcare - presents novel opportunities and potential for the treatment of diseases associated with an impaired endothelium. This review discusses therapies currently available for the treatment of these disorders and highlights the application of nanomedicine for the therapy of these major disease complications.
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Affiliation(s)
- Bomy Lee Chung
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology
- Department of Chemical Engineering, Massachusetts Institute of Technology
| | - Michael J. Toth
- George W. Woodruff School of Mechanical Engineering, Wallace H. Coulter Department of Biomedical Engineering, Institute for Electronics and Nanotechnology (IEN), Parker H. Petit Institute for Bioengineering and Bioscience (IBB), Georgia Institute of Technology
| | - Nazila Kamaly
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology
- Laboratory of Nanomedicine and Biomaterials, Brigham and Women’s Hospital, Harvard Medical School
| | - Yoshitaka J. Sei
- George W. Woodruff School of Mechanical Engineering, Wallace H. Coulter Department of Biomedical Engineering, Institute for Electronics and Nanotechnology (IEN), Parker H. Petit Institute for Bioengineering and Bioscience (IBB), Georgia Institute of Technology
| | - Jacob Becraft
- Department of Biological Engineering, Massachusetts Institute of Technology
| | - Willem J. M. Mulder
- Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai
| | - Zahi A. Fayad
- Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai
| | - Omid C. Farokhzad
- Laboratory of Nanomedicine and Biomaterials, Brigham and Women’s Hospital, Harvard Medical School
- King Abdulaziz University, Jeddah, Saudi Arabia
| | - YongTae Kim
- George W. Woodruff School of Mechanical Engineering, Wallace H. Coulter Department of Biomedical Engineering, Institute for Electronics and Nanotechnology (IEN), Parker H. Petit Institute for Bioengineering and Bioscience (IBB), Georgia Institute of Technology
| | - Robert Langer
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology
- Department of Chemical Engineering, Massachusetts Institute of Technology
- Department of Biological Engineering, Massachusetts Institute of Technology
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology
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31
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Pennington LD, Bartberger MD, Croghan MD, Andrews KL, Ashton KS, Bourbeau MP, Chen J, Chmait S, Cupples R, Fotsch C, Helmering J, Hong FT, Hungate RW, Jordan SR, Kong K, Liu L, Michelsen K, Moyer C, Nishimura N, Norman MH, Reichelt A, Siegmund AC, Sivits G, Tadesse S, Tegley CM, Van G, Yang KC, Yao G, Zhang J, Lloyd DJ, Hale C, St. Jean DJ. Discovery and Structure-Guided Optimization of Diarylmethanesulfonamide Disrupters of Glucokinase–Glucokinase Regulatory Protein (GK–GKRP) Binding: Strategic Use of a N → S (nN → σ*S–X) Interaction for Conformational Constraint. J Med Chem 2015; 58:9663-79. [DOI: 10.1021/acs.jmedchem.5b01367] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Lewis D. Pennington
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Michael D. Bartberger
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Michael D. Croghan
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Kristin L. Andrews
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Kate S. Ashton
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Matthew P. Bourbeau
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Jie Chen
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Samer Chmait
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Rod Cupples
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Christopher Fotsch
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Joan Helmering
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Fang-Tsao Hong
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Randall W. Hungate
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Steven R. Jordan
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Ke Kong
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Longbin Liu
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Klaus Michelsen
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Carolyn Moyer
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Nobuko Nishimura
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Mark H. Norman
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Andreas Reichelt
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Aaron C. Siegmund
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Glenn Sivits
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Seifu Tadesse
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Christopher M. Tegley
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Gwyneth Van
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Kevin C. Yang
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Guomin Yao
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Jiandong Zhang
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - David J. Lloyd
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Clarence Hale
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - David J. St. Jean
- Medicinal Chemistry, ‡Molecular Structure and Characterization, §Pharmacokinetics and
Drug Metabolism, ∥Metabolic Disorders Research, and ⊥Pathology, Amgen, One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
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32
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Ahad A, Al-Saleh AA, Akhtar N, Al-Mohizea AM, Al-Jenoobi FI. Transdermal delivery of antidiabetic drugs: formulation and delivery strategies. Drug Discov Today 2015; 20:1217-27. [DOI: 10.1016/j.drudis.2015.06.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 05/17/2015] [Accepted: 06/10/2015] [Indexed: 10/23/2022]
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Tse HM, Kozlovskaya V, Kharlampieva E, Hunter CS. Minireview: Directed Differentiation and Encapsulation of Islet β-Cells-Recent Advances and Future Considerations. Mol Endocrinol 2015; 29:1388-99. [PMID: 26340406 DOI: 10.1210/me.2015-1085] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Diabetes mellitus has rapidly become a 21st century epidemic with the promise to create vast economic and health burdens, if left unchecked. The 2 major forms of diabetes arise from unique causes, with outcomes being an absolute (type 1) or relative (type 2) loss of functional pancreatic islet β-cell mass. Currently, patients rely on exogenous insulin and/or other pharmacologies that restore glucose homeostasis. Although these therapies have prolonged countless lives over the decades, the striking increases in both type 1 and type 2 diabetic diagnoses worldwide suggest a need for improved treatments. To this end, islet biologists are developing cell-based therapies by which a patient's lost insulin-producing β-cell mass is replenished. Pancreatic or islet transplantation from cadaveric donors into diabetic patients has been successful, yet the functional islet demand far surpasses supply. Thus, the field has been striving toward transplantation of renewable in vitro-derived β-cells that can restore euglycemia. Challenges have been numerous, but progress over the past decade has generated much excitement. In this review we will summarize recent findings that have placed us closer than ever to β-cell replacement therapies. With the promise of cell-based diabetes therapies on the horizon, we will also provide an overview of cellular encapsulation technologies that will deliver critical protection of newly implanted cells.
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Affiliation(s)
- Hubert M Tse
- Department of Microbiology and the Comprehensive Diabetes Center (H.M.T.) and Departments of Chemistry (V.K., E.K.) and Medicine, Division of Endocrinology Diabetes and Metabolism, and Comprehensive Diabetes Center (C.S.H.), University of Alabama at Birmingham, Birmingham, Alabama 35294
| | - Veronika Kozlovskaya
- Department of Microbiology and the Comprehensive Diabetes Center (H.M.T.) and Departments of Chemistry (V.K., E.K.) and Medicine, Division of Endocrinology Diabetes and Metabolism, and Comprehensive Diabetes Center (C.S.H.), University of Alabama at Birmingham, Birmingham, Alabama 35294
| | - Eugenia Kharlampieva
- Department of Microbiology and the Comprehensive Diabetes Center (H.M.T.) and Departments of Chemistry (V.K., E.K.) and Medicine, Division of Endocrinology Diabetes and Metabolism, and Comprehensive Diabetes Center (C.S.H.), University of Alabama at Birmingham, Birmingham, Alabama 35294
| | - Chad S Hunter
- Department of Microbiology and the Comprehensive Diabetes Center (H.M.T.) and Departments of Chemistry (V.K., E.K.) and Medicine, Division of Endocrinology Diabetes and Metabolism, and Comprehensive Diabetes Center (C.S.H.), University of Alabama at Birmingham, Birmingham, Alabama 35294
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34
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Ennequin G, Boisseau N, Caillaud K, Chavanelle V, Etienne M, Li X, Sirvent P. Neuregulin 1 Improves Glucose Tolerance in db/db Mice. PLoS One 2015; 10:e0130568. [PMID: 26230680 PMCID: PMC4521942 DOI: 10.1371/journal.pone.0130568] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 05/21/2015] [Indexed: 01/14/2023] Open
Abstract
In vitro experiments using rodent skeletal muscle cells suggest that neuregulin 1 (NRG1) is involved in glucose metabolism regulation, although no study has evaluated the role of NRG1 in systemic glucose homeostasis. The purpose of this study was to investigate the effect of chronic and acute NRG1 treatment on glucose homeostasis in db/db mice. To this aim, glucose tolerance tests were performed in 8-week-old male db/db mice after treatment with NRG1 (50μg.kg-1) or saline 3 times per week for 8 weeks. In other experiments, glucose tolerance and pyruvate tolerance tests were performed in db/db mice 15 minutes after a single NRG1 (50μg.kg-1) or saline injection. Liver, adipose tissue, hypothalamus and skeletal muscle were also collected 30 minutes after acute NRG1 (50μg.kg-1) or saline treatment, and the phosphorylation status of the ERBB receptors, AKT (on Ser473) and FOXO1 (on Ser256) was assessed by western blotting. Chronic treatment (8 weeks) with NRG1 improved glucose tolerance in db/db mice. Acute treatment also lowered glycemia and insulinemia during glucose or pyruvate tolerance tests. NRG1 acute injection induced activation of ERBB3 receptors and phosphorylation of AKT and FOXO1 only in liver. Altogether, this study shows that acute and chronic NRG1 treatments improve glucose tolerance in db/db mice. This effect could be mediated through inhibition of hepatic gluconeogenesis.
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Affiliation(s)
- Gaël Ennequin
- Université Clermont Auvergne, Université Blaise Pascal, EA 3533, Laboratoire des Adaptations Métaboliques à l’Exercice en Conditions Physiologiques et Pathologiques (AME2P), BP 80026, F-63171, Aubière Cedex, France
- CRNH-Auvergne, Clermont-Ferrand, F-63001, France
| | - Nathalie Boisseau
- Université Clermont Auvergne, Université Blaise Pascal, EA 3533, Laboratoire des Adaptations Métaboliques à l’Exercice en Conditions Physiologiques et Pathologiques (AME2P), BP 80026, F-63171, Aubière Cedex, France
- CRNH-Auvergne, Clermont-Ferrand, F-63001, France
| | - Kevin Caillaud
- Université Clermont Auvergne, Université Blaise Pascal, EA 3533, Laboratoire des Adaptations Métaboliques à l’Exercice en Conditions Physiologiques et Pathologiques (AME2P), BP 80026, F-63171, Aubière Cedex, France
- CRNH-Auvergne, Clermont-Ferrand, F-63001, France
| | - Vivien Chavanelle
- Université Clermont Auvergne, Université Blaise Pascal, EA 3533, Laboratoire des Adaptations Métaboliques à l’Exercice en Conditions Physiologiques et Pathologiques (AME2P), BP 80026, F-63171, Aubière Cedex, France
- CRNH-Auvergne, Clermont-Ferrand, F-63001, France
| | - Monique Etienne
- Université Clermont Auvergne, Université Blaise Pascal, EA 3533, Laboratoire des Adaptations Métaboliques à l’Exercice en Conditions Physiologiques et Pathologiques (AME2P), BP 80026, F-63171, Aubière Cedex, France
- CRNH-Auvergne, Clermont-Ferrand, F-63001, France
| | - Xinyan Li
- Zensun Sci & Tech Ltd., Shanghai, China
| | - Pascal Sirvent
- Université Clermont Auvergne, Université Blaise Pascal, EA 3533, Laboratoire des Adaptations Métaboliques à l’Exercice en Conditions Physiologiques et Pathologiques (AME2P), BP 80026, F-63171, Aubière Cedex, France
- CRNH-Auvergne, Clermont-Ferrand, F-63001, France
- * E-mail:
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35
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Kalra S, Gupta Y, Patil S. Sodium-glucose cotransporter-2 inhibition and the insulin: Glucagon ratio: Unexplored dimensions. Indian J Endocrinol Metab 2015; 19:426-429. [PMID: 25932403 PMCID: PMC4366786 DOI: 10.4103/2230-8210.152793] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The sodium-glucose cotransporter 2 (SGLT-2) inhibitors are a novel class of glucose-lowering drugs which act by inhibiting the reabsorption of filtered glucose from the kidneys. Their effect on insulin and glucagon levels has recently been studied but is not fully explained. This communication proposes various hypotheses: A direct effect of SGLT-2 inhibition on the alpha cell receptors, a paracrine or intra-islet mediated effect on alpha cell sensitivity to glucose, and a calorie restriction mimetic action, to explain the impact of these drugs on the insulin glucagon ratio.
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Affiliation(s)
- Sanjay Kalra
- Department of Endocrinology, Bharti Hospital and B.R.I.D.E, Karnal, Haryana, India
| | - Yashdeep Gupta
- Department of Medicine, Government Medical College and Hospital, Chandigarh, India
| | - Shiva Patil
- Senior Medical Advisor, Boehringer Ingelheim, Mumbai, India
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Toth-Manikowski S, Atta MG. Diabetic Kidney Disease: Pathophysiology and Therapeutic Targets. J Diabetes Res 2015; 2015:697010. [PMID: 26064987 PMCID: PMC4430644 DOI: 10.1155/2015/697010] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 04/17/2015] [Indexed: 12/13/2022] Open
Abstract
Diabetes is a worldwide epidemic that has led to a rise in diabetic kidney disease (DKD). Over the past two decades, there has been significant clarification of the various pathways implicated in the pathogenesis of DKD. Nonetheless, very little has changed in the way clinicians manage patients with this disorder. Indeed, treatment is primarily centered on controlling hyperglycemia and hypertension and inhibiting the renin-angiotensin system. The purpose of this review is to describe the current understanding of how the hemodynamic, metabolic, inflammatory, and alternative pathways are all entangled in pathogenesis of DKD and detail the various therapeutic targets that may one day play a role in quelling this epidemic.
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Affiliation(s)
- Stephanie Toth-Manikowski
- Division of Nephrology, Johns Hopkins University, 1830 E. Monument Street, Suite 416, Baltimore, MD 21287, USA
| | - Mohamed G. Atta
- Division of Nephrology, Johns Hopkins University, 1830 E. Monument Street, Suite 416, Baltimore, MD 21287, USA
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De Ceuninck F, Kargar C, Charton Y, Goldstein S, Perron-Sierra F, Ilic C, Caliez A, Rolin JO, Sadlo M, Harley E, Vinson C, Ktorza A. S 50131 and S 51434, two novel small molecule glucokinase activators, lack chronic efficacy despite potent acute antihyperglycaemic activity in diabetic mice. Br J Pharmacol 2015; 169:999-1010. [PMID: 23488540 DOI: 10.1111/bph.12172] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 02/13/2013] [Accepted: 03/01/2013] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND AND PURPOSE Small molecule glucokinase activators (GKAs) have been associated with potent antidiabetic efficacy and hepatic steatosis in rodents. This study reports the discovery of S 50131 and S 51434, two novel GKAs with an original scaffold and an atypical pharmacological profile. EXPERIMENTAL APPROACH Activity of the compounds was assessed in vitro by measuring activation of recombinant glucokinase, stimulation of glycogen synthesis in rat hepatocytes and increased insulin secretion from rat pancreatic islets of Langerhans. Efficacy and safety in vivo were evaluated after oral administration in db/db mice by measuring glycaemia, HbA1c and dyslipidaemia-associated events. KEY RESULTS S 50131 and S 51434 activated GK and stimulated glycogen synthesis in hepatocytes and insulin secretion from pancreatic islets. Unexpectedly, while both compounds effectively lowered glycaemia after acute oral administration, they did not decrease HbA1c after a 4-week treatment in db/db mice. This lack of antidiabetic efficacy was associated with increased plasma free fatty acids (FFAs), contrasting with the effect of GKA50 and N00236460, two GKAs with sustained HbA1c lowering activity but neutral regarding plasma FFAs. S 50131, but not S 51434, also induced hepatic steatosis, as did GKA50 and N00236460. However, a shorter, 4-day treatment resulted in increased hepatic triglycerides without changing the plasma FFA levels, demonstrating dynamic alterations in the lipid profile over time. CONCLUSIONS AND IMPLICATIONS In addition to confirming the occurrence of dyslipidaemia with GKAs, these findings provide new insights into understanding how such compounds may sustain or lose efficacy over time.
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Affiliation(s)
- Frédéric De Ceuninck
- Department of Metabolic Diseases, Institut de Recherches Servier, Suresnes, France.
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Young MA, Wald JA, Matthews JE, Scott R, Hodge RJ, Zhi H, Reinhardt RR. Clinical Pharmacology of Albiglutide, a GLP-1 Receptor Agonist. Postgrad Med 2015; 126:84-97. [DOI: 10.3810/pgm.2014.11.2836] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Abstract
We report that INSL5 increases glucose-dependent insulin secretion in vitro and in vivo, and the intestinal L-cell line GLUTag expresses RXFP4 and responds to INSL5 stimulation by secreting GLP-1.
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Osigwe CC, Akah PA, Nworu CS, Okoye TC, Tchimene MK. Antihyperglycemic Studies on the Leaf Extract and Active Fractions of <i>Newbouldia laevis</i> (Bignoniaceae). ACTA ACUST UNITED AC 2015. [DOI: 10.4236/pp.2015.611054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Szkudelski T, Szkudelska K. Resveratrol and diabetes: from animal to human studies. Biochim Biophys Acta Mol Basis Dis 2014; 1852:1145-54. [PMID: 25445538 DOI: 10.1016/j.bbadis.2014.10.013] [Citation(s) in RCA: 230] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Revised: 10/10/2014] [Accepted: 10/20/2014] [Indexed: 02/07/2023]
Abstract
Diabetes mellitus is a serious disease affecting about 5% of people worldwide. Diabetes is characterized by hyperglycemia and impairment in insulin secretion and/or action. Moreover, diabetes is associated with metabolic abnormalities and serious complications. Resveratrol is a natural, biologically active polyphenol present in different plant species and known to have numerous health-promoting effects in both animals and humans. Anti-diabetic action of resveratrol has been extensively studied in animal models and in diabetic humans. In animals with experimental diabetes, resveratrol has been demonstrated to induce beneficial effects that ameliorate diabetes. Resveratrol, among others, improves glucose homeostasis, decreases insulin resistance, protects pancreatic β-cells, improves insulin secretion and ameliorates metabolic disorders. Effects induced by resveratrol are strongly related to the capability of this compound to increase expression/activity of AMPK and SIRT1 in various tissues of diabetic subjects. Moreover, anti-oxidant and anti-inflammatory effects of resveratrol were shown to be also involved in its action in diabetic animals. Preliminary clinical trials show that resveratrol is also effective in type 2 diabetic patients. Resveratrol may, among others, improve glycemic control and decrease insulin resistance. These results show that resveratrol holds great potential to treat diabetes and would be useful to support conventional therapy. This article is part of a Special Issue entitled: Resveratrol: Challenges in translating pre-clincial findigns to improved patient outcomes.
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Affiliation(s)
- Tomasz Szkudelski
- Department of Animal Physiology and Biochemistry, Poznan University of Life Sciences, Wolynska 35, 60-637 Poznan, Poland.
| | - Katarzyna Szkudelska
- Department of Animal Physiology and Biochemistry, Poznan University of Life Sciences, Wolynska 35, 60-637 Poznan, Poland
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Harnedy PA, O'Keeffe MB, FitzGerald RJ. Purification and identification of dipeptidyl peptidase (DPP) IV inhibitory peptides from the macroalga Palmaria palmata. Food Chem 2014; 172:400-6. [PMID: 25442570 DOI: 10.1016/j.foodchem.2014.09.083] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 08/01/2014] [Accepted: 09/16/2014] [Indexed: 01/05/2023]
Abstract
Dipeptidyl peptidase (DPP)-IV inhibitory peptides were purified and identified from an aqueous Palmaria palmata protein extract hydrolysed with Corolase PP. The hydrolysate was fractionated by solid phase extraction (SPE) using a C18 matrix followed by semi-preparative reverse phase-high performance liquid chromatography (SP RP-HPLC). IC50 values of 1.47 ± 0.09, 0.54 ± 0.03 and 0.36 ± 0.03 mg/ml were obtained for the hydrolysate, the 25%--acetonitrile (ACN) SPE fraction and the most active SP RP-HPLC peptide fraction (SP RP-HPLC 25_F28), respectively. Thirteen peptide sequences were identified following UPLC-ESI MS/MS analysis of SP RP-HPLC 25_F28. Three novel DPP-IV inhibitory peptides, Ile-Leu-Ala-Pro, Leu-Leu-Ala-Pro and Met-Ala-Gly-Val-Asp-His-Ile, with IC50 values in the range 43-159 μM were identified. The results indicate that P. palmata derived peptides may have potential as functional food ingredients in the prevention and management of type 2 diabetes.
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Abstract
INTRODUCTION The increasing prevalence of diabetes, with no cure on the horizon, continues to provide biopharmaceutical companies with an incentive to develop novel therapies and improve existing compounds. AREAS COVERED The following paper provides a summary of the experimental drug projects targeted for diabetes and associated complications that were discontinued in 2013. The discontinued projects, highlighted in this article, were identified via biopharmaceutical company pipelines, annual reports, and press releases. The authors also used other sources including: Google, ClinicalTrials.gov, and PubMed. Compounds were in various stages of development at termination and many of them had been associated with favorable effects in earlier studies. EXPERT OPINION There were two main reasons for the termination of anti-diabetic compounds that dominated 2013: concerns about safety and efficacy. Attempts to discover a novel mechanism that is both safe and effective in human disease present many challenges, not least is the cost for developing new treatments.
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Yacoub TG. Application of clinical judgment and guidelines to achieving glycemic goals in type 2 diabetes: focus on pharmacologic therapy. Postgrad Med 2014; 126:95-106. [PMID: 24918795 DOI: 10.3810/pgm.2014.05.2759] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Successful management of patients with type 2 diabetes mellitus requires attention to 4 pillars of care: diet, exercise, blood glucose monitoring, and pharmacologic therapy. For pharmacologic therapy, the availability of multiple drugs in different classes can make choices regarding initiation and intensification of treatment challenging. This article, focusing on clinical practice, reviews and provides guidance on assessing recommendations made by the latest diabetes guidelines for pharmacotherapy published by the American Diabetes Association and the American Academy of Clinical Endocrinologists. The article discusses how diabetes guidelines evolved, their move toward personalization of therapy, and their effective use in clinical practice. An appraisal of various pharmacologic strategies is integrated with the author's approach to achieving glycemic goals with a minimum of weight gain or hypoglycemic episodes. Using patients' baseline glycated hemoglobin levels and the degree to which their fasting and postprandial plasma levels contribute to their hyperglycemia is explained as a strategy by which drugs can be chosen that act on these parameters. Lifestyle interventions such as diet and exercise should continue to form the foundation of the therapeutic alliance between the clinician and patient as pharmacologic therapy is initiated or intensified.
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Affiliation(s)
- Tamer G Yacoub
- Clinical Endocrinologist, Prima-Care Medical Center, Fall River, MA.
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Marciniak C, Marechal X, Montaigne D, Neviere R, Lancel S. Cardiac contractile function and mitochondrial respiration in diabetes-related mouse models. Cardiovasc Diabetol 2014; 13:118. [PMID: 25142225 PMCID: PMC4243842 DOI: 10.1186/s12933-014-0118-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 07/23/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Pathophysiological processes underlying diabetic-related cardiomyopathies are complex. Mitochondria dysfunction is often described as a cause of cardiac impairment but its extent may depend on the type of experimental diabetes. Here we proposed to compare drug- or diet-induced models of diabetes in terms of metabolic features, cardiac and mitochondrial functions. METHODS Mice were fed with regular chow or fat-enriched diet. After three weeks, they received either citrate or streptozotocin injections for five consecutive days. Metabolic parameters, myocardial contractile function and mitochondrial respiration were measured after three more weeks. Fat mass volumes were assessed by magnetic resonance imaging. Oral glucose tolerance test, insulin tolerance test, triglyceride and adipocytokine quantification were evaluated to establish metabolic profiles. Cardiac function was assessed ex vivo onto a Langendorff column. Isolated cardiac mitochondria respiration was obtained using high-resolution oxygraphy. RESULTS Mice fed with the fat-enriched regimen presented abdominal obesity, increased blood glucose, elevated leptin level, glucose intolerance, and insulin resistance. Mice treated with streptozotocin, independently of the regimen, lost their capacity to release insulin in response to glucose ingestion. Mice fed with regular chow diet and injected with streptozotocin developed cardiac dysfunction without mitochondrial respiration defect. However, both groups of high-fat diet fed mice developed cardiac alterations associated with reduction in mitochondrial oxygen consumption, despite an increase in mitochondrial biogenesis signalling. CONCLUSIONS We explored three animal models mimicking type 1 and 2 diabetes. While cardiac dysfunction was present in the three groups of mice, mitochondrial respiration impairment was only obvious in models reproducing features of type 2 diabetes.
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Affiliation(s)
| | | | | | | | - Steve Lancel
- EA 4484 - Physiology Department, Faculty of Medicine, Lille 2 University, 1, place de Verdun, Lille 59045, France.
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Xu X, Wang G, Zhou T, Chen L, Chen J, Shen X. Novel approaches to drug discovery for the treatment of type 2 diabetes. Expert Opin Drug Discov 2014; 9:1047-58. [PMID: 25054271 DOI: 10.1517/17460441.2014.941352] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
INTRODUCTION Type 2 diabetes mellitus (T2DM) is a chronic, complex and multifactorial metabolic disorder, which has become a serious global health problem. The side effects of known drugs and the deficiency of long-term safety data, in addition to the already determined adverse effects for the current preclinical drugs against T2DM, have largely called upon the urgent exploration of novel therapeutic and preventative strategies against this disease. AREAS COVERED The authors highlight the potential approaches for anti-T2DM drug discovery by focusing on: the restoration of pancreatic β-cell mass, the promotion of insulin secretion, the regulation of oxidative stress and endoplasmic reticulum (ER) stress and the modulation of autophagy. EXPERT OPINION T2DM is based on the gradual development of insulin resistance and β-cell dysfunction. Thus, the restoration of β-cell function is considered as one of the promising therapeutic strategies against T2DM. The stress factors, such as oxidative stress, ER stress and autophagy, play potent roles in the regulation of β-cell apoptosis, insulin secretion and sensitivity in the development of T2DM involving complicated cross-talks. Based on multiplex stress-involved regulatory networks, more and more novel potential targets have been discovered and the multi-targeted drug leads are expected to help develop more effective clinical agents for the treatment of T2DM.
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Affiliation(s)
- Xing Xu
- Shanghai Institute of Materia Medica, Key Laboratory of Receptor Research, Chinese Academy of Sciences , 555 Zuchongzhi Road, Shanghai 201203 , China ; ;
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Mujahid M, Kunte S, Muthukrishnan M. A new enantioselective synthesis of (S)-2-ethoxy-3-(4-hydroxyphenyl)propanoic acid esters (EEHP and IEHP), useful pharmaceutical intermediates of PPAR agonists. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.04.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Al-aryahi S, Kamato D, Getachew R, Zheng W, Potocnik SJ, Cohen N, Guidone D, Osman N, Little PJ. Atherogenic, fibrotic and glucose utilising actions of glucokinase activators on vascular endothelium and smooth muscle. Cardiovasc Diabetol 2014; 13:80. [PMID: 24731772 PMCID: PMC4016772 DOI: 10.1186/1475-2840-13-80] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 04/10/2014] [Indexed: 12/11/2022] Open
Abstract
Background Pharmaceutical interventions for diabetes aim to control glycaemia and to prevent the development of complications, such as cardiovascular diseases. Some anti-hyperglycaemic drugs have been found to have adverse cardiovascular effects in their own right, limiting their therapeutic role. Glucokinase activity in the pancreas is critical in enhancing insulin release in response to hyperglycaemia. Glucokinase activators (GKAs) are novel agents for diabetes which act by enhancing the formation of glucose-6-phosphate leading to increased insulin production and subsequent suppression of blood glucose. Little, however, is known about the direct effects of GKAs on cardiovascular cells. Methods The effect of the GKAs RO28-1675 and Compound A on glucose utilisation in bovine aortic endothelial cells (BAEC) and rat MIN6 was observed by culturing the cells at high and low glucose concentration in the presence and absence of the GKAs and measuring glucose consumption. The effect of RO28-1675 at various concentrations on glucose-dependent signalling in BAEC was observed by measuring Smad2 phosphorylation by Western blotting. The effect of RO28-1675 on TGF-β stimulated proteoglycan synthesis was measured by 35S-SO4 incorporation and assessment of proteoglycan size by SDS-PAGE. The effects of RO28-1675 on TGF-β mediated Smad2C phosphorylation in BAEC was observed by measurement of pSmad2C levels. The direct actions of RO28-1675 on vascular reactivity were observed by measuring arteriole tone and lumen diameter. Results GKAs were demonstrated to increase glucose utilisation in pancreatic but not endothelial cells. Glucose-activated Smad2 phosphorylation was decreased in a dose-dependent fashion in the presence of RO28-1675. No effect of RO28-1675 was observed on TGF-β stimulated proteoglycan production. RO28-1675 caused a modest dilation in arteriole but not contractile sensitivity. Conclusions GKA RO28-1675 did not increase glucose consumption in endothelial cells indicating the absence of glucokinase in those cells. No direct deleterious actions, in terms of atherogenic changes or excessive vasoactive effects were seen on cells or vessels of the cardiovascular system in response to GKAs. If reflected in vivo, these drugs are unlikely to have their use compromised by direct cardiovascular toxicity.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Peter J Little
- Discipline of Pharmacy and Diabetes Complications Group, Health Innovations Research Institute, School of Medical Sciences, RMIT University, Bundoora, VIC 3083, Australia.
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Discovery and characterization of novel small molecule agonists of G protein-coupled receptor 119. Acta Pharmacol Sin 2014; 35:540-8. [PMID: 24681896 DOI: 10.1038/aps.2014.8] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Accepted: 03/05/2014] [Indexed: 02/06/2023] Open
Abstract
AIM GPR119 is a G protein-coupled receptor (GPCR) that is highly expressed in pancreatic β-cells and intestinal L-cells and facilitates glucose-stimulated insulin secretion (GSIS). GPR119 may represent a novel target for the treatment of metabolic disorders. Here, we sought to identify novel small-molecule GPR119 agonists. METHODS A cell-based high-throughput screening assay was established using HEK293 cells stably expressing GPR119 and pCRE-luc reporter plasmid (HEK293/GPR119/pCRE-luc). A compound library composed of 1440 compounds was screened. Mouse β-cell line MIN-6 and isolated mouse islets were used to evaluate the effects of candidate compounds on GSIS in vitro. RESULTS Three compounds with novel structures (ZSY-04, -06, and -13) were found to activate GPR119-mediated signaling and to induce GPR119 desensitization. The EC50 values of ZSY-04, -06, and -13 in stimulating intracellular cAMP accumulation in HEK293/GPR119 cells were 2.758, 3.046, and 0.778 μmol/L, respectively. Furthermore, all three compounds displayed high selectivity for GPR119, and did not activate other 9 GPCRs tested. Moreover, all three compounds significantly increased GSIS in both MIN-6 mouse β-cells and isolated mouse islets at concentration of 10 μmol/L. CONCLUSION Three novel small-molecule GPR119 agonists (ZSY-04, -06, and -13) with high receptor selectivity and capacity to induce GSIS in vitro were discovered. These compounds are potential candidates to be structurally optimized into drugs for the treatment of type 2 diabetes.
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50
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Park K, Lee BM, Hyun KH, Lee DH, Choi HH, Kim H, Chong W, Kim KB, Nam SY. Discovery of 3-(4-methanesulfonylphenoxy)-N-[1-(2-methoxy-ethoxymethyl)-1H-pyrazol-3-yl]-5-(3-methylpyridin-2-yl)-benzamide as a novel glucokinase activator (GKA) for the treatment of type 2 diabetes mellitus. Bioorg Med Chem 2014; 22:2280-93. [DOI: 10.1016/j.bmc.2014.02.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 02/05/2014] [Accepted: 02/09/2014] [Indexed: 02/05/2023]
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