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de Oliveira E Silva AM, Pereira RO, Oliveira AKDS, Harris FS, de Melo ILP, Almeida-Souza TH, Yoshime LT, Dos Santos Melo C, Lopes Dos Santos J, de Andrade-Wartha ERS, Cogliati B, Granato D, Mancini-Filho J. Ameliorative effects of aqueous extract from rosemary on oxidative stress and inflammation pathways caused by a high-fat diet in C57BL/6 mice. Appl Physiol Nutr Metab 2024; 49:459-472. [PMID: 38048548 DOI: 10.1139/apnm-2023-0157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
Rosemary is an herb exhibits biological properties, attenuates inflammation, oxidative stress, and improves lipid profile. Here, we evaluated the effects of rosemary aqueous extract (RE) on mice fed with a high-fat diet (HFD). Male C57BL/6 mice were administered a control diet or HFD for 10 weeks. The treated groups received RE in the diet at different concentrations: 25, 250, and 500 mg/100 g. After 10 weeks, serum concentrations of glucose, lipid, insulin, leptin, adiponectin, and cytokines were evaluated and the oxygen radical absorbance capacity was determined. Histological analysis was performed to determine the concentrations of triacylglycerides (TG), total cholesterol, cytokines, and antioxidant enzymes as well as the expression of genes involved in lipid metabolism, oxidative stress, and inflammation. The dietary RE ameliorated HFD-induced weight gain, adipose tissue weight, glucose intolerance, and insulin, leptin, and free fatty acid levels. Reduction in hepatic TG deposition was observed. The levels of inflammatory cytokines decreased, and the expression of genes involved in lipid metabolism increased. RE mitigated oxidative stress and reduced the production of reactive oxygen species in HepG2 and 3T3-L1 cells. Therefore, RE is a potential therapeutic agent for the prevention of inflammation and oxidative stress outcomes associated with obesity.
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Affiliation(s)
- Ana Mara de Oliveira E Silva
- Nutrition Sciences Graduate Program, Federal University of Sergipe (UFS), São Cristóvão, Sergipe, Brazil
- Health Sciences Graduate Program, Federal University of Sergipe (UFS), Aracaju, Sergipe, Brazil
| | - Raquel Oliveira Pereira
- Health Sciences Graduate Program, Federal University of Sergipe (UFS), Aracaju, Sergipe, Brazil
| | | | - Fernanda Santana Harris
- Department of Food and Experimental Nutrition, Laboratory of Lipids, Faculty of Pharmaceutical Sciences, University of São Paulo (USP), São Paulo, São Paulo, Brazil
| | - Illana Louise Pereira de Melo
- Department of Food and Experimental Nutrition, Laboratory of Lipids, Faculty of Pharmaceutical Sciences, University of São Paulo (USP), São Paulo, São Paulo, Brazil
| | | | - Luciana Tedesco Yoshime
- Department of Food and Experimental Nutrition, Laboratory of Lipids, Faculty of Pharmaceutical Sciences, University of São Paulo (USP), São Paulo, São Paulo, Brazil
| | - Caroline Dos Santos Melo
- Nutrition Sciences Graduate Program, Federal University of Sergipe (UFS), São Cristóvão, Sergipe, Brazil
| | - Jymmys Lopes Dos Santos
- Department of Morphology, Federal University of Sergipe (UFS), São Cristóvão, Sergipe, Brazil
| | | | - Bruno Cogliati
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo (USP), São Paulo, São Paulo, Brazil
| | - Daniel Granato
- Department of Biological Sciences, Faculty of Science and Engineering, University of Limerick, Limerick, V94 T9PX, Ireland
| | - Jorge Mancini-Filho
- Department of Food and Experimental Nutrition, Laboratory of Lipids, Faculty of Pharmaceutical Sciences, University of São Paulo (USP), São Paulo, São Paulo, Brazil
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McCarty SM, Clasby MC, Sexton JZ. High-Throughput Methods for the Discovery of Small Molecule Modulators of Pancreatic Beta-Cell Function and Regeneration. Assay Drug Dev Technol 2024; 22:148-159. [PMID: 38526231 DOI: 10.1089/adt.2023.119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024] Open
Abstract
The progression of type II diabetes (T2D) is characterized by a complex and highly variable loss of beta-cell mass, resulting in impaired insulin secretion. Many T2D drug discovery efforts aimed at discovering molecules that can protect or restore beta-cell mass and function have been developed using limited beta-cell lines and primary rodent/human pancreatic islets. Various high-throughput screening methods have been used in the context of drug discovery, including luciferase-based reporter assays, glucose-stimulated insulin secretion, and high-content screening. In this context, a cornerstone of small molecule discovery has been the use of immortalized rodent beta-cell lines. Although insightful, this usage has led to a more comprehensive understanding of rodent beta-cell proliferation pathways rather than their human counterparts. Advantages gained in enhanced physiological relevance are offered by three-dimensional (3D) primary islets and pseudoislets in contrast to monolayer cultures, but these approaches have been limited to use in low-throughput experiments. Emerging methods, such as high-throughput 3D islet imaging coupled with machine learning, aim to increase the feasibility of integrating 3D microtissue structures into high-throughput screening. This review explores the current methods used in high-throughput screening for small molecule modulators of beta-cell mass and function, a potentially pivotal strategy for diabetes drug discovery.
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Affiliation(s)
- Sean M McCarty
- Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, Michigan, USA
- Department of Internal Medicine, Gastroenterology and Hepatology, Michigan Medicine at the University of Michigan, Ann Arbor, Michigan, USA
| | - Martin C Clasby
- Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, Michigan, USA
| | - Jonathan Z Sexton
- Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, Michigan, USA
- Department of Internal Medicine, Gastroenterology and Hepatology, Michigan Medicine at the University of Michigan, Ann Arbor, Michigan, USA
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3
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Kacar AK, Aylar D, Kazdal F, Bahadori F. BuOH fraction of Salix Babylonica L. extract increases pancreatic beta-cell tumor death at lower doses without harming their function. Toxicol In Vitro 2023; 90:105609. [PMID: 37164183 DOI: 10.1016/j.tiv.2023.105609] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 04/30/2023] [Accepted: 05/02/2023] [Indexed: 05/12/2023]
Abstract
Salix babylonica L. is a species of the willow tree. Insulinoma is a tumor originating from pancreatic beta cells. This study aims to research the effect of different fractions of Salix babylonica L. leaf extract on INS-1 cells for treating pancreatic tumors. Cell death occurred at lower doses in the EtOAc fraction. The cells are functional in the BuOH fraction but not in EtOAc and H2O fractions. The EtOAc fraction has a higher percentage of necrosis and ROS. INS1, INS2, and AKT gene expressions in the H2O fraction, GLUT2, IR, HSP70 gene expressions, and WNT4 protein levels increased in the BuOH fraction. HSP90 gene expression, Beta-actin, GAPDH, insulin, HSP70, HSP90, HSF1, Beta-Catenin, and WNT7A protein levels were decreased, while IR immunolabelling intensity increased in both fractions. Ca+2, K+, Na+, and CA-19-9 in the cell, Ca+2 and K+ in secretion increased. The secondary metabolites in the EtOAc fraction cause more damage in INS-1 cells. Since the water fraction also causes the cells to die in high doses, cell function is damaged. The secondary metabolites in the BuOH fraction kill INS-1 cells with less damage. This makes the BuOH fraction of Salix babylonica L. more valuable.
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Affiliation(s)
- Ayse Karatug Kacar
- Istanbul University, Faculty of Science, Department of Biology, Istanbul, Turkey.
| | - Dilara Aylar
- Center for Immunology and Inflammation, Feinstein Institutes for Medical Research, Manhasset, NY, United States
| | - Fatma Kazdal
- Bezmialem Vakif University, Institute of Health Sciences, Department of Medicinal Biochemistry, Istanbul, Turkey
| | - Fatemeh Bahadori
- Istanbul University-Cerrahpasa, Faculty of Pharmacy, Department of Analytical Chemistry, Istanbul, Turkey
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Al Kury LT. Modulatory Effect of Medicinal Plants and Their Active Constituents on ATP-Sensitive Potassium Channels (KATP) in Diabetes. Pharmaceuticals (Basel) 2023; 16:ph16040523. [PMID: 37111281 PMCID: PMC10142548 DOI: 10.3390/ph16040523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/24/2023] [Accepted: 03/28/2023] [Indexed: 04/03/2023] Open
Abstract
Hyperglycemia, which is a chronic metabolic condition caused by either a defect in insulin secretion or insulin resistance, is a hallmark of diabetes mellitus (DM). Sustained hyperglycemia leads to the onset and development of many health complications. Despite the number of available antidiabetic medications on the market, there is still a need for novel treatment agents with increased efficacy and fewer adverse effects. Many medicinal plants offer a rich supply of bioactive compounds that have remarkable pharmacological effects with less toxicity and side effects. According to published evidence, natural antidiabetic substances influence pancreatic β-cell development and proliferation, inhibit pancreatic β-cell death, and directly increase insulin output. Pancreatic ATP-sensitive potassium channels play an essential role in coupling glucose metabolism to the secretion of insulin. Although much of the literature is available on the antidiabetic effects of medicinal plants, very limited studies discuss their direct action on pancreatic KATP. The aim of this review is to focus on the modulatory effects of antidiabetic medicinal plants and their active constituents on pancreatic KATP. The KATP channel should be regarded as a key therapeutic milestone in the treatment of diabetes. Therefore, continuous research into the interaction of medicinal plants with the KATP channel is crucial.
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Affiliation(s)
- Lina T Al Kury
- Department of Health Sciences, College of Natural and Health Sciences, Zayed University, Abu Dhabi 144534, United Arab Emirates
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Enhancement of nutraceutical and anti-diabetic potential of fenugreek (Trigonella foenum-graecum). Sprouts with natural elicitors. Saudi Pharm J 2023; 31:1-13. [PMID: 36685305 PMCID: PMC9845115 DOI: 10.1016/j.jsps.2022.11.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 11/02/2022] [Indexed: 11/11/2022] Open
Abstract
Trigonella foenum-graecum has been extensively used for centuries in traditional medicine systems for the cure of health ailments including diabetes. Improving the medicinal attributes of plants through the elicitation strategy is gaining great interest in the recent past. In the current study, an attempt is made to reveal the role and possible mechanism of action of vitamin C elicit phytochemical-rich aqueous extract of 4th day germinated IM6 genotype fenugreek sprouts in the form of lyophilized powder (IM6E) under both in vitro and in vivo conditions. The IM6E demonstrated strong α-glucosidase activity (95.24 %) and moderate α-amylase and invertase inhibition activities under in vitro conditions. The High Performance Thin Layer Chromatography (HPTLC) based analysis demonstrated that IM6E possess significantly higher concentration of phenolic phytochemical quercetin (0.148 %) as compared to diosgenin and trigonelline bioactive anti-diabetic nutraceuticals. In normal rats after loading with glucose and sucrose, the IM6E administration in a dose-dependent manner significantly reduced the post-prandial hyperglycemia, in a similar fashion as the anti-diabetic drug voglibose as evident from the area under curves (AUC) of oral glucose tolerance test (OGTT) and oral sucrose tolerance test (OSTT) tests. The administration of IM6E in streptozotocin (STZ) induced diabetic rats drastically improved the antioxidant activity of plasma in them as determined by Ferric Reducing Ability of Plasma (FRAP) and the effect was found to be dose-dependent. The oral administration of IM6E in diabetic rats normalized almost all the deregulated biochemical markers like liver enzymes, lipids and significantly decreased higher blood glucose levels with increasing insulin levels as compared to diabetic control. The best concentration of IM6E was found to be 300 mg/kg b.w after 21 days of experimentation. The intra-peritoneal glucose tolerance test (IPGTT) in diabetic rats responded very well to IM6E treatment and 100 mg/kg.b.w. behaved almost like the administration of 0.5U insulin/kg bw, and thus indicating the insulinotropic nature of IM6E. Our findings clearly reveal the use of IM6E for diabetes management and at the same it possesses great potential when combined with voglibose to ameliorate diabetes and its associated complications to a greater extent due to synergistic effects as compared to monotherapy. However, more clinical trials need to be performed before recommending IM6E as an anti-diabetic alternative medicine.
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Kalwat MA, Rodrigues-dos-Santos K, Binns DD, Wei S, Zhou A, Evans MR, Posner BA, Roth MG, Cobb MH. Small molecule glucagon release inhibitors with activity in human islets. Front Endocrinol (Lausanne) 2023; 14:1114799. [PMID: 37152965 PMCID: PMC10157210 DOI: 10.3389/fendo.2023.1114799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 04/07/2023] [Indexed: 05/09/2023] Open
Abstract
Purpose Type 1 diabetes (T1D) accounts for an estimated 5% of all diabetes in the United States, afflicting over 1.25 million individuals. Maintaining long-term blood glucose control is the major goal for individuals with T1D. In T1D, insulin-secreting pancreatic islet β-cells are destroyed by the immune system, but glucagon-secreting islet α-cells survive. These remaining α-cells no longer respond properly to fluctuating blood glucose concentrations. Dysregulated α-cell function contributes to hyper- and hypoglycemia which can lead to macrovascular and microvascular complications. To this end, we sought to discover small molecules that suppress α-cell function for their potential as preclinical candidate compounds. Prior high-throughput screening identified a set of glucagon-suppressing compounds using a rodent α-cell line model, but these compounds were not validated in human systems. Results Here, we dissociated and replated primary human islet cells and exposed them to 24 h treatment with this set of candidate glucagon-suppressing compounds. Glucagon accumulation in the medium was measured and we determined that compounds SW049164 and SW088799 exhibited significant activity. Candidate compounds were also counter-screened in our InsGLuc-MIN6 β-cell insulin secretion reporter assay. SW049164 and SW088799 had minimal impact on insulin release after a 24 h exposure. To further validate these hits, we treated intact human islets with a selection of the top candidates for 24 h. SW049164 and SW088799 significantly inhibited glucagon release into the medium without significantly altering whole islet glucagon or insulin content. In concentration-response curves SW088799 exhibited significant inhibition of glucagon release with an IC50 of 1.26 µM. Conclusion Given the set of tested candidates were all top hits from the primary screen in rodent α-cells, this suggests some conservation of mechanism of action between human and rodents, at least for SW088799. Future structure-activity relationship studies of SW088799 may aid in elucidating its protein target(s) or enable its use as a tool compound to suppress α-cell activity in vitro.
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Affiliation(s)
- Michael A. Kalwat
- Lilly Diabetes Center of Excellence, Indiana Biosciences Research Institute, Indianapolis, IN, United States
- Indiana University School of Medicine, Center for Diabetes and Metabolic Diseases, Indianapolis, IN, United States
- *Correspondence: Michael A. Kalwat, ;
| | - Karina Rodrigues-dos-Santos
- Lilly Diabetes Center of Excellence, Indiana Biosciences Research Institute, Indianapolis, IN, United States
| | - Derk D. Binns
- Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Shuguang Wei
- Department Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Anwu Zhou
- Department Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Matthew R. Evans
- Department Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Bruce A. Posner
- Department Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Michael G. Roth
- Department Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Melanie H. Cobb
- Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX, United States
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Gahramanov V, Oz M, Aouizerat T, Rosenzweig T, Gorelick J, Drori E, Salmon-Divon M, Sherman MY, Lubin BCR. Integration of the Connectivity Map and Pathway Analysis to Predict Plant Extract’s Medicinal Properties—The Study Case of Sarcopoterium spinosum L. PLANTS 2022; 11:plants11172195. [PMID: 36079576 PMCID: PMC9460920 DOI: 10.3390/plants11172195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/13/2022] [Accepted: 08/21/2022] [Indexed: 11/16/2022]
Abstract
Medicinal properties of plants are usually identified based on knowledge of traditional medicine or using low-throughput screens for specific pharmacological activities. The former is very biased since it requires prior knowledge of plants’ properties, while the latter depends on a specific screening system and will miss medicinal activities not covered by the screen. We sought to enrich our understanding of the biological activities of Sarcopoterium spinosum L. root extract based on transcriptome changes to uncover a plurality of possible pharmacological effects without the need for prior knowledge or functional screening. We integrated Gene Set Enrichment Analysis of the RNAseq data to identify pathways affected by the treatment of cells with the extract and perturbational signatures in the CMAP database to enhance the validity of the results. Activities of signaling pathways were measured using immunoblotting with phospho-specific antibodies. Mitochondrial membrane potential was assessed using JC-1 staining. SARS-CoV-2-induced cell killing was assessed in Vero E6 and A549 cells using an MTT assay. Here, we identified transcriptome changes following exposure of cultured cells to the medicinal plant Sarcopoterium spinosum L. root extract. By integrating algorithms of GSEA and CMAP, we confirmed known anti-cancer activities of the extract and predicted novel biological effects on oxidative phosphorylation and interferon pathways. Experimental validation of these pathways uncovered strong activation of autophagy, including mitophagy, and excellent protection from SARS-CoV-2 infection. Our study shows that gene expression analysis alone is insufficient for predicting biological effects since some of the changes reflect compensatory effects, and additional biochemical tests provide necessary corrections. This study defines the advantages and limitations of transcriptome analysis in predicting the biological and medicinal effects of the Sarcopoterium spinosum L. extract. Such analysis could be used as a general approach for predicting the medicinal properties of plants.
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Affiliation(s)
- Valid Gahramanov
- Department of Molecular Biology, Ariel University, Ariel 40700, Israel
| | - Moria Oz
- Agriculture and Oenology Department, Eastern Regional R&D Center, Ariel 40700, Israel
| | - Tzemach Aouizerat
- Institute of Dental Sciences, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 9112001, Israel
| | - Tovit Rosenzweig
- Department of Molecular Biology, Ariel University, Ariel 40700, Israel
- Adelson School of Medicine, Ariel University, Ariel 40700, Israel
| | - Jonathan Gorelick
- Judea Branch, Eastern Regional R&D Center, Kiryat Arba, Ariel 40700, Israel
| | - Elyashiv Drori
- Agriculture and Oenology Department, Eastern Regional R&D Center, Ariel 40700, Israel
- Department of Chemical Engineering, Biotechnology and Materials, Ariel University, Ariel 40700, Israel
| | - Mali Salmon-Divon
- Department of Molecular Biology, Ariel University, Ariel 40700, Israel
- Adelson School of Medicine, Ariel University, Ariel 40700, Israel
| | | | - Bat Chen R. Lubin
- Agriculture and Oenology Department, Eastern Regional R&D Center, Ariel 40700, Israel
- Department of Chemical Engineering, Biotechnology and Materials, Ariel University, Ariel 40700, Israel
- Correspondence: ; Tel.: +972-50-6554655
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8
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Evaluation of Biological Activity of Natural Compounds: Current Trends and Methods. Molecules 2022; 27:molecules27144490. [PMID: 35889361 PMCID: PMC9324072 DOI: 10.3390/molecules27144490] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 06/26/2022] [Accepted: 07/04/2022] [Indexed: 02/08/2023] Open
Abstract
Natural compounds have diverse structures and are present in different forms of life. Metabolites such as tannins, anthocyanins, and alkaloids, among others, serve as a defense mechanism in live organisms and are undoubtedly compounds of interest for the food, cosmetic, and pharmaceutical industries. Plants, bacteria, and insects represent sources of biomolecules with diverse activities, which are in many cases poorly studied. To use these molecules for different applications, it is essential to know their structure, concentrations, and biological activity potential. In vitro techniques that evaluate the biological activity of the molecules of interest have been developed since the 1950s. Currently, different methodologies have emerged to overcome some of the limitations of these traditional techniques, mainly via reductions in time and costs. These emerging technologies continue to appear due to the urgent need to expand the analysis capacity of a growing number of reported biomolecules. This review presents an updated summary of the conventional and relevant methods to evaluate the natural compounds’ biological activity in vitro.
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Rodrigues-dos-Santos K, Roy G, Binns DD, Grzemska MG, Barella LF, Armoo F, McCoy MK, Huynh AV, Yang JZ, Posner BA, Cobb MH, Kalwat MA. Small Molecule-mediated Insulin Hypersecretion Induces Transient ER Stress Response and Loss of Beta Cell Function. Endocrinology 2022; 163:6596276. [PMID: 35641126 PMCID: PMC9225822 DOI: 10.1210/endocr/bqac081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Indexed: 11/19/2022]
Abstract
Pancreatic islet beta cells require a fine-tuned endoplasmic reticulum (ER) stress response for normal function; abnormal ER stress contributes to diabetes pathogenesis. Here, we identified a small molecule, SW016789, with time-dependent effects on beta cell ER stress and function. Acute treatment with SW016789 potentiated nutrient-induced calcium influx and insulin secretion, while chronic exposure to SW016789 transiently induced ER stress and shut down secretory function in a reversible manner. Distinct from the effects of thapsigargin, SW016789 did not affect beta cell viability or apoptosis, potentially due to a rapid induction of adaptive genes, weak signaling through the eIF2α kinase PERK, and lack of oxidative stress gene Txnip induction. We determined that SW016789 acted upstream of voltage-dependent calcium channels (VDCCs) and potentiated nutrient- but not KCl-stimulated calcium influx. Measurements of metabolomics, oxygen consumption rate, and G protein-coupled receptor signaling did not explain the potentiating effects of SW016789. In chemical cotreatment experiments, we discovered synergy between SW016789 and activators of protein kinase C and VDCCs, suggesting involvement of these pathways in the mechanism of action. Finally, chronically elevated calcium influx was required for the inhibitory impact of SW016789, as blockade of VDCCs protected human islets and MIN6 beta cells from hypersecretion-induced dysfunction. We conclude that beta cells undergoing this type of pharmacological hypersecretion have the capacity to suppress their function to mitigate ER stress and avoid apoptosis. These results have the potential to uncover beta cell ER stress mitigation factors and add support to beta cell rest strategies to preserve function.
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Affiliation(s)
| | | | | | | | - Luiz F Barella
- Lilly Diabetes Center of Excellence, Indiana Biosciences Research Institute, Indianapolis, IN, USA
| | - Fiona Armoo
- Lilly Diabetes Center of Excellence, Indiana Biosciences Research Institute, Indianapolis, IN, USA
| | - Melissa K McCoy
- Departments of Biochemistry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Andy V Huynh
- Departments of Pharmacology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Jonathan Z Yang
- Departments of Pharmacology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Bruce A Posner
- Departments of Biochemistry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Melanie H Cobb
- Departments of Pharmacology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Michael A Kalwat
- Correspondence: Michael A. Kalwat, PhD, Lilly Diabetes Center of Excellence, Indiana Biosciences Research Institute, 1210 Waterway Blvd Ste, 2000 Indianapolis, IN 46202, USA. or
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Ollinger N, Neuhauser C, Schwarzinger B, Wallner M, Schwarzinger C, Blank-Landeshammer B, Hager R, Sadova N, Drotarova I, Mathmann K, Karamouzi E, Panopoulos P, Rimbach G, Lüersen K, Weghuber J, Röhrl C. Anti-Hyperglycemic Effects of Oils and Extracts Derived from Sea Buckthorn - A Comprehensive Analysis Utilizing In Vitro and In Vivo Models. Mol Nutr Food Res 2022; 66:e2101133. [PMID: 35426970 PMCID: PMC9285508 DOI: 10.1002/mnfr.202101133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 03/14/2022] [Indexed: 12/15/2022]
Abstract
SCOPE Sea buckthorn (Hippophaes rhamnoides) is capable of ameliorating disturbed glucose metabolism in animal models and human subjects. Here, the effect of sea buckthorn oil as well as of extracts of fruits, leaves, and press cake on postprandial glucose metabolism is systematically investigated. METHODS AND RESULTS Sea buckthorn did neither exert decisive effects in an in vitro model of intestinal glucose absorption nor did it alter insulin secretion. However, sea buckthorn stimulates GLUT4 translocation to the plasma membrane comparable to insulin, indicative of increased glucose clearance from the circulation. Isorhamnetin is identified in all sea buckthorn samples investigated and is biologically active in triggering GLUT4 cell surface localization. Consistently, sea buckthorn products lower circulating glucose by ≈10% in a chick embryo model. Moreover, sea buckthorn products fully revert hyperglycemia in the nematode Caenorhabditis elegans while they are ineffective in Drosophila melanogaster under euglycemic conditions. CONCLUSION These data indicate that edible sea buckthorn products as well as by-products are promising resources for hypoglycemic nutrient supplements that increase cellular glucose clearance into target tissues.
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Affiliation(s)
- Nicole Ollinger
- FFoQSI - Austrian Competence Centre for Feed and Food Quality, Safety & Innovation, FFoQSI GmbH, Technopark 1D, Tulln, 3430, Austria
| | - Cathrina Neuhauser
- University of Applied Sciences Upper Austria, Stelzhamerstrasse 23, Wels, 4600, Austria
| | - Bettina Schwarzinger
- FFoQSI - Austrian Competence Centre for Feed and Food Quality, Safety & Innovation, FFoQSI GmbH, Technopark 1D, Tulln, 3430, Austria.,University of Applied Sciences Upper Austria, Stelzhamerstrasse 23, Wels, 4600, Austria
| | - Melanie Wallner
- FFoQSI - Austrian Competence Centre for Feed and Food Quality, Safety & Innovation, FFoQSI GmbH, Technopark 1D, Tulln, 3430, Austria
| | - Clemens Schwarzinger
- Johannes Kepler University, Institute for Chemical Technology of Organic Materials, Linz, 4040, Austria
| | - Bernhard Blank-Landeshammer
- FFoQSI - Austrian Competence Centre for Feed and Food Quality, Safety & Innovation, FFoQSI GmbH, Technopark 1D, Tulln, 3430, Austria
| | - Roland Hager
- University of Applied Sciences Upper Austria, Stelzhamerstrasse 23, Wels, 4600, Austria
| | - Nadiia Sadova
- University of Applied Sciences Upper Austria, Stelzhamerstrasse 23, Wels, 4600, Austria
| | - Ivana Drotarova
- University of Applied Sciences Upper Austria, Stelzhamerstrasse 23, Wels, 4600, Austria
| | - Katrin Mathmann
- University of Applied Sciences Upper Austria, Stelzhamerstrasse 23, Wels, 4600, Austria
| | - Eugenia Karamouzi
- European Research & Development Rezos Brands, 196 New National Road Patras-Athens, Patras, 26443, Greece
| | - Panagiotis Panopoulos
- European Research & Development Rezos Brands, 196 New National Road Patras-Athens, Patras, 26443, Greece
| | - Gerald Rimbach
- Institute of Human Nutrition and Food Science, University of Kiel, Hermann-Rodewald-Strasse 6, Kiel, 24118, Germany
| | - Kai Lüersen
- Institute of Human Nutrition and Food Science, University of Kiel, Hermann-Rodewald-Strasse 6, Kiel, 24118, Germany
| | - Julian Weghuber
- FFoQSI - Austrian Competence Centre for Feed and Food Quality, Safety & Innovation, FFoQSI GmbH, Technopark 1D, Tulln, 3430, Austria.,University of Applied Sciences Upper Austria, Stelzhamerstrasse 23, Wels, 4600, Austria
| | - Clemens Röhrl
- University of Applied Sciences Upper Austria, Stelzhamerstrasse 23, Wels, 4600, Austria
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11
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Wagner BK. Small-molecule discovery in the pancreatic beta cell. Curr Opin Chem Biol 2022; 68:102150. [PMID: 35487100 DOI: 10.1016/j.cbpa.2022.102150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 03/16/2022] [Accepted: 03/22/2022] [Indexed: 12/11/2022]
Abstract
The pancreatic beta cell is the only cell type in the body responsible for insulin secretion, and thus plays a unique role in the control of glucose homeostasis. The loss of beta-cell mass and function plays an important role in both type 1 and type 2 diabetes. Thus, using chemical biology to identify small molecules targeting the beta cell could be an important component to developing future therapeutics for diabetes. This strategy provides an attractive path toward increasing beta-cell numbers in vivo. A regenerative strategy involves enhancing proliferation, differentiation, or neogenesis. On the other hand, protecting beta cells from cell death, or improving maturity and function, could preserve beta-cell mass. Here, we discuss the current state of chemical matter available to study beta-cell regeneration, and how they were discovered.
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Affiliation(s)
- Bridget K Wagner
- Chemical Biology and Therapeutics Science Program, Broad Institute, Cambridge, MA 02142, USA.
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