1
|
Grieve LM, Rani A, ZeRuth GT. Downregulation of Glis3 in INS1 cells exposed to chronically elevated glucose contributes to glucotoxicity-associated β cell dysfunction. Islets 2024; 16:2344622. [PMID: 38652652 PMCID: PMC11042057 DOI: 10.1080/19382014.2024.2344622] [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: 12/06/2023] [Accepted: 04/15/2024] [Indexed: 04/25/2024] Open
Abstract
Chronically elevated levels of glucose are deleterious to pancreatic β cells and contribute to β cell dysfunction, which is characterized by decreased insulin production and a loss of β cell identity. The Krüppel-like transcription factor, Glis3 has previously been shown to positively regulate insulin transcription and mutations within the Glis3 locus have been associated with the development of several pathologies including type 2 diabetes mellitus. In this report, we show that Glis3 is significantly downregulated at the transcriptional level in INS1 832/13 cells within hours of being subjected to high glucose concentrations and that diminished expression of Glis3 is at least partly attributable to increased oxidative stress. CRISPR/Cas9-mediated knockdown of Glis3 indicated that the transcription factor was required to maintain normal levels of both insulin and MafA expression and reduced Glis3 expression was concomitant with an upregulation of β cell disallowed genes. We provide evidence that Glis3 acts similarly to a pioneer factor at the insulin promoter where it permissively remodels the chromatin to allow access to a transcriptional regulatory complex including Pdx1 and MafA. Finally, evidence is presented that Glis3 can positively regulate MafA transcription through its pancreas-specific promoter and that MafA reciprocally regulates Glis3 expression. Collectively, these results suggest that decreased Glis3 expression in β cells exposed to chronic hyperglycemia may contribute significantly to reduced insulin transcription and a loss of β cell identity.
Collapse
Affiliation(s)
- LilyAnne M. Grieve
- Department of Biological Sciences, Murray State University, Murray, KY, USA
| | - Abhya Rani
- Department of Biological Sciences, Murray State University, Murray, KY, USA
| | - Gary T. ZeRuth
- Department of Biological Sciences, Murray State University, Murray, KY, USA
| |
Collapse
|
2
|
Kamelnia R, Ahmadi-Hamedani M, Darroudi M, Kamelnia E. Improving the stability of insulin through effective chemical modifications: A Comprehensive review. Int J Pharm 2024; 661:124399. [PMID: 38944170 DOI: 10.1016/j.ijpharm.2024.124399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 06/11/2024] [Accepted: 06/26/2024] [Indexed: 07/01/2024]
Abstract
Insulin, an essential peptide hormone, conjointly regulates blood glucose levels by its receptor and it is used as vital drug to treat diabetes. This therapeutic hormone may undergo different chemical modifications during industrial processes, pharmaceutical formulation, and through its endogenous storage in the pancreatic β-cells. Insulin is highly sensitive to environmental stresses and readily undergoes structural changes, being also able to unfold and aggregate in physiological conditions. Even; small changes altering the structural integrity of insulin may have significant impacts on its biological efficacy to its physiological and pharmacological activities. Insulin analogs have been engineered to achieve modified properties, such as improved stability, solubility, and pharmacokinetics, while preserving the molecular pharmacology of insulin. The casually or purposively strategies of chemical modifications of insulin occurred to improve its therapeutic and pharmaceutical properties. Knowing the effects of chemical modification, formation of aggregates, and nanoparticles on protein can be a new look at the production of protein analogues drugs and its application in living system. The project focused on effects of chemical modifications and nanoparticles on the structure, stability, aggregation and their results in effective drug delivery system, biological activity, and pharmacological properties of insulin. The future challenge in biotechnology and pharmacokinetic arises from the complexity of biopharmaceuticals, which are often molecular structures that require formulation and delivery strategies to ensure their efficacy and safety.
Collapse
Affiliation(s)
- Reyhane Kamelnia
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Semnan University, Semnan, Iran
| | - Mahmood Ahmadi-Hamedani
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Semnan University, Semnan, Iran.
| | - Majid Darroudi
- Nuclear Medicine Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Elahe Kamelnia
- Department of biology, Faculty of sciences, Mashhad branch, Islamic Azad University, Mashhad, Iran
| |
Collapse
|
3
|
Oropeza D, Herrera PL. Glucagon-producing α-cell transcriptional identity and reprogramming towards insulin production. Trends Cell Biol 2024; 34:180-197. [PMID: 37626005 DOI: 10.1016/j.tcb.2023.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/07/2023] [Accepted: 07/11/2023] [Indexed: 08/27/2023]
Abstract
β-Cell replacement by in situ reprogramming of non-β-cells is a promising diabetes therapy. Following the observation that near-total β-cell ablation in adult mice triggers the reprogramming of pancreatic α-, δ-, and γ-cells into insulin (INS)-producing cells, recent studies are delving deep into the mechanisms controlling adult α-cell identity. Systematic analyses of the α-cell transcriptome and epigenome have started to pinpoint features that could be crucial for maintaining α-cell identity. Using different transgenic and chemical approaches, significant advances have been made in reprogramming α-cells in vivo into INS-secreting cells in mice. The recent reprogramming of human α-cells in vitro is an important step forward that must now be complemented with a comprehensive molecular dissection of the mechanisms controlling α-cell identity.
Collapse
Affiliation(s)
- Daniel Oropeza
- Department of Genetic Medicine and Development, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Pedro Luis Herrera
- Department of Genetic Medicine and Development, Faculty of Medicine, University of Geneva, Geneva, Switzerland.
| |
Collapse
|
4
|
Kwon J, Kim MS, Blagojevic C, Mailloux J, Medwid S, Tirona RG, Wang R, Schwarz UI. Differential effects of OATP2B1 on statin accumulation and toxicity in a beta cell model. Toxicol Mech Methods 2024; 34:130-147. [PMID: 37771097 DOI: 10.1080/15376516.2023.2262568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 09/19/2023] [Indexed: 09/30/2023]
Abstract
An increased risk of new-onset diabetes mellitus has been recently reported for statin therapy, and experimental studies have shown reduced glucose-stimulated insulin secretion (GSIS) and mitochondrial dysfunction in beta cells with effects differing among agents. Organic anion transporting polypeptide (OATP) 2B1 contributes to hepatic uptake of rosuvastatin, atorvastatin and pravastatin, three known substrates. Since OATP2B1 is present in beta cells of the human pancreas, we investigated if OATP2B1 facilitates the local accumulation of statins in a rat beta cell model INS-1 832/13 (INS-1) thereby amplifying statin-induced toxicity. OATP2B1 overexpression in INS-1 cells via adenoviral transduction showed 2.5-, 1.8- and 1.4-fold higher cellular retention of rosuvastatin, atorvastatin and pravastatin, respectively, relative to LacZ control, while absolute intracellular concentration was about twice as high for the lipophilic atorvastatin compared to the more hydrophilic rosuvastatin and pravastatin. After 24 h statin treatment at high concentrations, OATP2B1 enhanced statin toxicity involving activation of intrinsic apoptosis (caspase 3/7 activation) and mitochondrial dysfunction (NADH dehydrogenase activity) following rosuvastatin and atorvastatin, which was partly reversed by isoprenoids. OATP2B1 had no effect on statin-induced reduction in GSIS, mitochondrial electron transport chain complex expression or caspase 9 activation. We confirmed a dose-dependent reduction in insulin secretion by rosuvastatin and atorvastatin in native INS-1 with a modest change in cellular ATP. Collectively, our results indicate a role of OATP2B1, which is abundant in human beta cells, in statin accumulation and statin-induced toxicity but not insulin secretion of rosuvastatin and atorvastatin in INS-1 cells.
Collapse
Affiliation(s)
- Jihoon Kwon
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Michelle S Kim
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Christina Blagojevic
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Jaymie Mailloux
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Samantha Medwid
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Rommel G Tirona
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Rennian Wang
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Ute I Schwarz
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
- Department of Medicine, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| |
Collapse
|
5
|
Athar F, Karmani M, Templeman N. Metabolic hormones are integral regulators of female reproductive health and function. Biosci Rep 2024; 44:BSR20231916. [PMID: 38131197 PMCID: PMC10830447 DOI: 10.1042/bsr20231916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 11/29/2023] [Accepted: 12/21/2023] [Indexed: 12/23/2023] Open
Abstract
The female reproductive system is strongly influenced by nutrition and energy balance. It is well known that food restriction or energy depletion can induce suppression of reproductive processes, while overnutrition is associated with reproductive dysfunction. However, the intricate mechanisms through which nutritional inputs and metabolic health are integrated into the coordination of reproduction are still being defined. In this review, we describe evidence for essential contributions by hormones that are responsive to food intake or fuel stores. Key metabolic hormones-including insulin, the incretins (glucose-dependent insulinotropic polypeptide and glucagon-like peptide-1), growth hormone, ghrelin, leptin, and adiponectin-signal throughout the hypothalamic-pituitary-gonadal axis to support or suppress reproduction. We synthesize current knowledge on how these multifaceted hormones interact with the brain, pituitary, and ovaries to regulate functioning of the female reproductive system, incorporating in vitro and in vivo data from animal models and humans. Metabolic hormones are involved in orchestrating reproductive processes in healthy states, but some also play a significant role in the pathophysiology or treatment strategies of female reproductive disorders. Further understanding of the complex interrelationships between metabolic health and female reproductive function has important implications for improving women's health overall.
Collapse
Affiliation(s)
- Faria Athar
- Department of Biology, University of Victoria, Victoria, British Columbia V8P 5C2, Canada
| | - Muskan Karmani
- Department of Biology, University of Victoria, Victoria, British Columbia V8P 5C2, Canada
| | - Nicole M. Templeman
- Department of Biology, University of Victoria, Victoria, British Columbia V8P 5C2, Canada
| |
Collapse
|
6
|
Márquez Álvarez CDM, Gómez-Crisóstomo NP, De la Cruz-Hernández EN, El-Hafidi M, Pedraza-Chaverri J, Medina-Campos ON, Martínez-Abundis E. Chronic consumption of imbalance diets high in sucrose or fat induces abdominal obesity with different pattern of metabolic disturbances and lost in Langerhans cells population. Life Sci 2024; 336:122305. [PMID: 38030061 DOI: 10.1016/j.lfs.2023.122305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 11/15/2023] [Accepted: 11/23/2023] [Indexed: 12/01/2023]
Abstract
AIM Obesity is a worldwide health issue, associated with development of type 2 Diabetes Mellitus. The aim of this study is to analyze the effect of consumption of two hypercaloric diets on metabolic disturbance and beta cells damage. MAIN METHODS Male Wistar rats were subjected to twelve months consumption of three diets: a Control balanced diet (CTD, carbohydrates 58 %, proteins 29 %, lipids 13 %) and two hypercaloric diets, high in sucrose (HSD, carbohydrates 68 %, proteins 22 %, lipids 10 %) or high in fat (HFD, carbohydrates 31 %, proteins 14 %, lipids 55 %). Serum levels of glucose, triglycerides and free fatty acids were measured after zoometric parameters determination. Antioxidant enzymes activity and oxidative stress-marker were measured in pancreas tissue among histological analysis of Langerhans islets. KEY FINDINGS Although diets were hypercaloric, the amount of food consumed by rats decreased, resulting in an equal caloric consumption. The HSD induced hypertriglyceridemia and hyperglycemia with higher levels in free fatty acids (FFA, lipotoxicity); whereas HFD did not increased neither the triglycerides nor FFA, nevertheless the loss of islets' cell was larger. Both diets induced obesity with hyperglycemia and significant reduction in Langerhans islets size. SIGNIFICANCE Our results demonstrate that consumption of HSD induces more significant metabolic disturbances that HFD, although both generated pancreas damage; as well hypercaloric diet consumption is not indispensable to becoming obese; the chronic consumption of unbalanced diets (rich in carbohydrates or lipids) may lead to abdominal obesity with metabolic and functional disturbances, although the total amount of calories are similar.
Collapse
Affiliation(s)
- Corazón de María Márquez Álvarez
- Laboratorio de Investigación en Enfermedades Metabólicas e Infecciosas, División Académica Multidisciplinaria de Comalcalco, Universidad Juárez Autónoma de Tabasco, Ranchería Sur, Cuarta Sección, C.P. 86650 Comalcalco, Tabasco, Mexico
| | - Nancy P Gómez-Crisóstomo
- Laboratorio de Investigación en Enfermedades Metabólicas e Infecciosas, División Académica Multidisciplinaria de Comalcalco, Universidad Juárez Autónoma de Tabasco, Ranchería Sur, Cuarta Sección, C.P. 86650 Comalcalco, Tabasco, Mexico
| | - Erick N De la Cruz-Hernández
- Laboratorio de Investigación en Enfermedades Metabólicas e Infecciosas, División Académica Multidisciplinaria de Comalcalco, Universidad Juárez Autónoma de Tabasco, Ranchería Sur, Cuarta Sección, C.P. 86650 Comalcalco, Tabasco, Mexico
| | - Mohammed El-Hafidi
- Departamento de Biomedicina Cardiovascular, Instituto Nacional de Cardiología Ignacio Chávez, 14080 CDMX, Mexico
| | - José Pedraza-Chaverri
- Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - Omar Noel Medina-Campos
- Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - Eduardo Martínez-Abundis
- Laboratorio de Investigación en Enfermedades Metabólicas e Infecciosas, División Académica Multidisciplinaria de Comalcalco, Universidad Juárez Autónoma de Tabasco, Ranchería Sur, Cuarta Sección, C.P. 86650 Comalcalco, Tabasco, Mexico.
| |
Collapse
|
7
|
McLaughlin AJ, Kaniski AI, Matti DI, Monear NC, Tischler JL, Xhabija B. Fluorene-9-bisphenol affects the terminal differentiation of mouse embryonic bodies. Curr Res Toxicol 2023; 5:100133. [PMID: 37964943 PMCID: PMC10641737 DOI: 10.1016/j.crtox.2023.100133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 10/28/2023] [Accepted: 10/30/2023] [Indexed: 11/16/2023] Open
Abstract
Fluorene-9-bisphenol (BHPF) has recently attracted interest as it is increasingly used in industrial settings as a substitute for Bisphenol A (BPA). However, the effects of BHPF exposure on embryonic stem cell (ESC) self-renewal, pluripotency, and differentiation remain poorly understood. This study investigates the impacts of BHPF on mouse embryonic stem cells (mESCs) and embryonic bodies (EBs). Our results reveal that BHPF exposure leads to a morphological shift in mESCs, reducing the percentage of dome-shaped colonies and indicating loss of self-renewal and pluripotency. BHPF exposure also appeared to affect the early stages of EB formation and their growth dynamics, with a reduction in EB numbers and an increase in their size. Subsequent gene expression analysis revealed that BHPF exposure led to increased expression of the inflammatory gene Il6, indicating a potential stress response. Furthermore, BHPF affected the terminal differentiation pathway, modulating the expression of 16 genes associated with distinct cell types, including lymphatic endothelium, keratinocyte epithelium, pancreatic beta cells, macrophages, monocytes, T-cells, neurons, retinal ganglion cells, nephrons proximal tubule cells, and cardiomyocytes. These findings offer insights into the impact of BHPF on ESC biology and suggest potential implications for developmental and neurodegenerative disorders. Future work should focus on elucidating the underlying mechanisms of BHPF-mediated effects on stem cell function. This may offer new perspectives for understanding the health impacts of environmental exposure to BHPF.
Collapse
Affiliation(s)
- Aidan J. McLaughlin
- College of Arts Sciences and Letters, Department of Natural Science, University of Michigan-Dearborn, Dearborn, MI 48128, United States
| | - Anthony I. Kaniski
- College of Arts Sciences and Letters, Department of Natural Science, University of Michigan-Dearborn, Dearborn, MI 48128, United States
| | - Darena I. Matti
- College of Arts Sciences and Letters, Department of Natural Science, University of Michigan-Dearborn, Dearborn, MI 48128, United States
| | - Nicodemus C. Monear
- College of Arts Sciences, Department of Natural Science, University of Michigan-Flint, Flint, MI, United States
| | - Jessica L. Tischler
- College of Arts Sciences, Department of Natural Science, University of Michigan-Flint, Flint, MI, United States
| | - Besa Xhabija
- College of Arts Sciences and Letters, Department of Natural Science, University of Michigan-Dearborn, Dearborn, MI 48128, United States
| |
Collapse
|
8
|
Tovar A, Kyono Y, Nishino K, Bose M, Varshney A, Parker SCJ, Kitzman JO. Using a modular massively parallel reporter assay to discover context-specific regulatory grammars in type 2 diabetes. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.08.561391. [PMID: 37873175 PMCID: PMC10592691 DOI: 10.1101/2023.10.08.561391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Recent genome-wide association studies have established that most complex disease-associated loci are found in noncoding regions where defining their function is nontrivial. In this study, we leverage a modular massively parallel reporter assay (MPRA) to uncover sequence features linked to context-specific regulatory activity. We screened enhancer activity across a panel of 198-bp fragments spanning over 10k type 2 diabetes- and metabolic trait-associated variants in the 832/13 rat insulinoma cell line, a relevant model of pancreatic beta cells. We explored these fragments' context sensitivity by comparing their activities when placed up-or downstream of a reporter gene, and in combination with either a synthetic housekeeping promoter (SCP1) or a more biologically relevant promoter corresponding to the human insulin gene ( INS ). We identified clear effects of MPRA construct design on measured fragment enhancer activity. Specifically, a subset of fragments (n = 702/11,656) displayed positional bias, evenly distributed across up- and downstream preference. A separate set of fragments exhibited promoter bias (n = 698/11,656), mostly towards the cell-specific INS promoter (73.4%). To identify sequence features associated with promoter preference, we used Lasso regression with 562 genomic annotations and discovered that fragments with INS promoter-biased activity are enriched for HNF1 motifs. HNF1 family transcription factors are key regulators of glucose metabolism disrupted in maturity onset diabetes of the young (MODY), suggesting genetic convergence between rare coding variants that cause MODY and common T2D-associated regulatory variants. We designed a follow-up MPRA containing HNF1 motif-enriched fragments and observed several instances where deletion or mutation of HNF1 motifs disrupted the INS promoter-biased enhancer activity, specifically in the beta cell model but not in a skeletal muscle cell line, another diabetes-relevant cell type. Together, our study suggests that cell-specific regulatory activity is partially influenced by enhancer-promoter compatibility and indicates that careful attention should be paid when designing MPRA libraries to capture context-specific regulatory processes at disease-associated genetic signals.
Collapse
|
9
|
Kohara Y, Ikai S, Yoshihara A, Murao K, Sugiyama Y. Effect of chronic exposure to ketohexoses on pancreatic β-cell function in INS-1 rat insulinoma cells. Biosci Biotechnol Biochem 2023; 87:163-170. [PMID: 36413460 DOI: 10.1093/bbb/zbac190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Accepted: 11/16/2022] [Indexed: 11/23/2022]
Abstract
Glucotoxicity, impaired insulin secretion, suppression of insulin gene expression, and apoptosis, in pancreatic β-cells caused by chronic hyperglycemia is a key component of the pathogenesis of type 2 diabetes. Recently, it has been reported that rare sugar d-allulose has antihyperglycemic and antihyperlipidemic effects in diabetic rats. However, the direct effects of rare sugars including d-allulose on pancreatic β-cell function are unclear. In this study, we investigated whether chronic exposure to ketohexoses causes glucotoxicity, suppression of insulin gene expression, and apoptosis, in INS-1 rat pancreatic insulinoma cells. d-Fructose, d-tagatose, l-allulose, and l-sorbose treatment for 1-week reduced insulin gene expression, whereas d-allulose, d-sorbose, l-fructose, and l-tagatose did not. All ketohexoses were transported into INS-1 cells, but were not metabolized. In addition, the ketohexoses did not induce apoptosis and did not affect glucose metabolism. These results suggest that long-term administration of d-allulose, d-sorbose, l-fructose, and l-tagatose does not affect pancreatic β-cell function.
Collapse
Affiliation(s)
- Yuri Kohara
- Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki, Kagawa, Japan
| | - Shuta Ikai
- Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki, Kagawa, Japan
| | - Akihide Yoshihara
- International Institute of Rare Sugar Research and Education, Kagawa University, Miki, Kagawa, Japan
| | - Koji Murao
- Department of Endocrinology and Metabolism, Faculty of Medicine, Kagawa University, Miki, Kagawa, Japan
| | - Yasunori Sugiyama
- Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki, Kagawa, Japan
| |
Collapse
|
10
|
Expression Profiling of Pdx1, Ngn3, and MafA in the Liver and Pancreas of Recovering Streptozotocin-Induced Diabetic Rats. Genes (Basel) 2022; 13:genes13091625. [PMID: 36140793 PMCID: PMC9498460 DOI: 10.3390/genes13091625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 09/07/2022] [Accepted: 09/08/2022] [Indexed: 11/17/2022] Open
Abstract
Studies in animal diabetic models have demonstrated the possibility of islet regeneration through treatment with natural extracts, such as Allium sativum (garlic). This study aimed to investigate the effect of garlic extract (GE) on the expression of three genes (Ngn3, Pdx1, and MafA) in the pancreas and liver of diabetic rats. Thirty-two rats were divided into two groups, streptozotocin (STZ)-induced diabetic rats (n = 16) and healthy rats (n = 16). Both groups were subdivided into GE-treated (n = 8), and those administered 0.9% normal saline (NS) (n = 8) for 1 week (n = 4) and 8 weeks (n = 4). In the pancreas of diabetic rats treated with GE for 1 week, all three genes, Ngn3, Pdx1, and MafA, were significantly upregulated (p ≤ 0.01, p ≤ 0.05, and p ≤ 0.001, respectively) when compared to diabetic rats treated with NS only. However, after eight weeks of GE treatment, the expression of all three genes decreased as blood insulin increased. In the liver, only Pdx1 expression significantly (p ≤ 0.05) increased after 8 weeks. The significant expression of Ngn3, Pdx1, and MafA in the pancreas by week 1 may have induced the maturation of juvenile β-cells, which escaped the effects of STZ and caused an increase in serum insulin.
Collapse
|
11
|
Zhou J, Zhang Z, Yang Y, Liao F, Zhou P, Wang Y, Zhang H, Jiang H, Alinejad T, Shan G, Wu S. Deletion of serine racemase reverses neuronal insulin signaling inhibition by amyloid-β oligomers. J Neurochem 2022; 163:8-25. [PMID: 35839294 DOI: 10.1111/jnc.15664] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 04/26/2022] [Accepted: 07/06/2022] [Indexed: 11/27/2022]
Abstract
Dysregulation of insulin signaling in the Alzheimer's (AD) brain has been extensively reported. Serine racemase(SR) modulates insulin secretion in pancreatic islets. Similarly, we wonder whether or not SR regulates insulin synthesis and secretion in neurons, thereby modulating insulin signaling in the AD brain. Srr-knockout (Srr-/- ) mice generated with the CRISPR/Cas9 technique were used. Using immunofluorescence and fluorescence in situ hybridization, the levels of insulin protein and insulin(ins2) mRNA significantly increased in the hippocampal but not in the hypothalamic sections of Srr-/- mice compared with WT mice. Using real-time quantitative PCR, ins2 mRNA from primary hippocampal neuronal cultures of Srr-/- mice significantly increased compared with the cultured neurons from WT mice. Notably, the secretion of proinsulin C-peptide increased in Srr-/- neurons relative to WT neurons. By examining the membrane fractional proteins with immunoblotting, Srr-/- neurons retained ATP-dependent potassium channel on plasmalemma and correspondingly contained higher levels of p-AMPK. Under treatment by Aβ42, the phosphorylation levels of insulin receptor substrate at serine 616,636 (p-IRS1ser616,636 ) were significantly lower whereas p-AKT308 and p-AKT473 were higher in Srr-/- neurons, compared with WT neurons, respectively. The phosphorylated form of c-Jun N-terminal kinase decreased in the cultured Srr-/- neurons relative to the WT neurons upon Aβ42 treatment. In contrast, the phosphorylated protein kinase R remained at the same levels. Further, reactive oxygen species reduced in the cultured Srr-/- neurons under Aβ42 treatment relative to the WT neurons. Altogether, our study indicated that Srr deletion promoted insulin synthesis and secretion of proinsulin C-peptide, thereby reversing insulin resistance by Aβ42. This study suggests that targeting the neuronal SR may be utilized to enhance insulin signaling which is inhibited at the early stage of the AD brain.
Collapse
Affiliation(s)
- Jing Zhou
- School of Optometry and Ophthalmology and the Eye Hospital, Wenzhou Medical University, Zhejiang, P.R. China.,State Key Laboratory of Optometry, Ophthalmology, and Visual Science, Zhejiang, P.R. China
| | - Zhiwen Zhang
- School of Optometry and Ophthalmology and the Eye Hospital, Wenzhou Medical University, Zhejiang, P.R. China.,State Key Laboratory of Optometry, Ophthalmology, and Visual Science, Zhejiang, P.R. China
| | - Yuanhong Yang
- School of Optometry and Ophthalmology and the Eye Hospital, Wenzhou Medical University, Zhejiang, P.R. China.,State Key Laboratory of Optometry, Ophthalmology, and Visual Science, Zhejiang, P.R. China
| | - Fei Liao
- School of Optometry and Ophthalmology and the Eye Hospital, Wenzhou Medical University, Zhejiang, P.R. China.,State Key Laboratory of Optometry, Ophthalmology, and Visual Science, Zhejiang, P.R. China
| | - Piansi Zhou
- School of Optometry and Ophthalmology and the Eye Hospital, Wenzhou Medical University, Zhejiang, P.R. China.,State Key Laboratory of Optometry, Ophthalmology, and Visual Science, Zhejiang, P.R. China
| | - Yan Wang
- School of Optometry and Ophthalmology and the Eye Hospital, Wenzhou Medical University, Zhejiang, P.R. China.,State Key Laboratory of Optometry, Ophthalmology, and Visual Science, Zhejiang, P.R. China
| | - He Zhang
- School of Optometry and Ophthalmology and the Eye Hospital, Wenzhou Medical University, Zhejiang, P.R. China.,State Key Laboratory of Optometry, Ophthalmology, and Visual Science, Zhejiang, P.R. China.,College of Life and Environmental Sciences, Wenzhou University, Zhejiang, People's Republic of China
| | - Haiyan Jiang
- School of Optometry and Ophthalmology and the Eye Hospital, Wenzhou Medical University, Zhejiang, P.R. China.,State Key Laboratory of Optometry, Ophthalmology, and Visual Science, Zhejiang, P.R. China
| | - Tahereh Alinejad
- The Key Laboratory of Interventional Pulmonology of Zhejiang Province, Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, South Baixiang, Ouhai District, Zhejiang, China
| | - Ge Shan
- CAS Key Laboratory of Innate Immunity and Chronic Disease, CAS Center for Excellence in Molecular Cell Science, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui Province, China
| | - Shengzhou Wu
- School of Optometry and Ophthalmology and the Eye Hospital, Wenzhou Medical University, Zhejiang, P.R. China.,State Key Laboratory of Optometry, Ophthalmology, and Visual Science, Zhejiang, P.R. China
| |
Collapse
|
12
|
In vitro differentiation of human pancreatic duct-derived PANC-1 cells into β-cell phenotype using Tinospora cordifolia. In Vitro Cell Dev Biol Anim 2022; 58:376-383. [PMID: 35668153 DOI: 10.1007/s11626-022-00690-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 05/02/2022] [Indexed: 11/05/2022]
Abstract
Type 1 diabetes mellitus is an autoimmune disorder leading to loss of beta cells. There is a dire need to inhibit apoptosis and induce regeneration of new beta cells. There are plants in the Indian medicine system having the potential for rejuvenation. In the present study, we have attempted to evaluate the capacity of aqueous extract of Tinospora cordifolia to regenerate beta cells from PANC-1 ductal cells. After differentiation, the characterization of β-cell phenotype was carried out using dithizone and Gomori's staining and further confirmed by mRNA expression study of insulin, Pdx-1, and carbonic anhydrase-9. Insulin production was estimated with ELISA. Aqueous extract of Tinospora cordifolia at 15 μg/ml concentration can effectively induce differentiation of PANC-1 cells into beta cells. The morphological observations showed brownish-colored dithizone and purple-colored Gomori's staining. The β-cells demonstrated significant mRNA expression of insulin and Pdx-1 and downregulation of carbonic anhydrase-9. The functionality of beta cells was demonstrated by 1.5-fold increase in insulin secretion in response to high glucose. Tinospora cordifolia has potential to differentiate PANC-1 ductal cells into functional beta cells and can be a lead towards non-invasive treatment of type 1 diabetes mellitus.
Collapse
|
13
|
Chai S, Kim Y, Galivo F, Dorrell C, Wakefield L, Posey J, Ackermann AM, Kaestner KH, Hebrok M, Grompe M. Development of a beta cell-specific expression control element for rAAV. Hum Gene Ther 2022; 33:789-800. [PMID: 35297680 PMCID: PMC9419973 DOI: 10.1089/hum.2021.219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Diabetes mellitus, caused by loss or dysfunction of the insulin producing beta cells of the pancreas, is a promising target for rAAV-mediated gene therapy. To target potential therapeutic payloads specifically to beta cells, a cell-type specific expression control element is needed. Here, we tested a series of rAAV vectors designed to express transgenes specifically in human beta cells using the islet-tropic rAAV-KP1 capsid. A small promoter, consisting of only 84 bp of the insulin core promoter was not beta cell-specific in AAV, but highly active in multiple cell types, including tissues outside the pancreas. A larger 363 bp fragment of the insulin promoter (INS) also lacked beta cell specificity. However, beta cell-specific expression was achieved by combining two regulatory elements, a promoter consisting of two copies of INS (INSx2) and microRNA (miRNA) regulatory elements (MREs). The INSx2 promoter alone showed some beta cell preference, but not tight specificity. To reduce unspecific transgene expression in alpha cells, negative regulation by miRNAs was applied. MREs that are recognized by miRNAs abundant in alpha cells effectively downregulated the transgene expression in these cells. The INS2x-MRE expression vector was highly specific to human beta cells and stem cell derived beta cells.
Collapse
Affiliation(s)
- Sunghee Chai
- Oregon Health & Science University, 6684, Oregon Stem cell center, 3181 SW Sam Jackson Park Road, LBRB Rm 753, Portland, Oregon, United States, 97239-3098;
| | - Youngjin Kim
- UCSF, 8785, UCSF Diabetes Center, San Francisco, California, United States;
| | - Feorillo Galivo
- Oregon Health & Science University, 6684, Oregon Stem cell center, Portland, Oregon, United States;
| | - Craig Dorrell
- OHSU, 6684, Oregon Stem Cell Center, Portland, Oregon, United States;
| | - Leslie Wakefield
- OHSU, 6684, Oregon Stem Cell Center, Portland, Oregon, United States;
| | - Jeffrey Posey
- OHSU, 6684, Oregon Stem Cell Center, Portland, Oregon, United States;
| | - Amanda M Ackermann
- Upenn, 6572, Department of Genetics, Philadelphia, Pennsylvania, United States;
| | - Klaus H Kaestner
- Upenn, 6572, Department of Genetics, Philadelphia, Pennsylvania, United States;
| | - Matthias Hebrok
- UCSF, 8785, UCSF Diabetes Center, San Francisco, California, United States;
| | - Markus Grompe
- OHSU, 6684, Oregon Stem Cell Center, Portland, Oregon, United States;
| |
Collapse
|
14
|
Transcriptional control of pancreatic β-cell identity and plasticity during the pathogenesis of type 2 diabetes. J Genet Genomics 2022; 49:316-328. [DOI: 10.1016/j.jgg.2022.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 02/23/2022] [Accepted: 03/06/2022] [Indexed: 11/21/2022]
|
15
|
Nanoparticles of Costus speciosus Ameliorate Diabetes-Induced Structural Changes in Rat Prostate through Mediating the Pro-Inflammatory Cytokines IL 6, IL1β and TNF-α. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27031027. [PMID: 35164292 PMCID: PMC8839105 DOI: 10.3390/molecules27031027] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 01/26/2022] [Accepted: 01/28/2022] [Indexed: 11/17/2022]
Abstract
Diabetes mellitus is a common global health problem. Among the complications that are frequently associated with DM are the alternation of sexual function and fertility, especially in young men. This study aimed to assess the efficacy of nanoparticles of Costus speciosus (C. speciosus) in preserving the prostatic structure of diabetic rats and to explore the mechanism behind this effect. A model of DM was induced in male albino rats by a single intraperitoneally injection of streptozotocin (STZ, 60 mg/kg body weight). Five groups (n = 10 each) of rats were included in this study: the control, C. speciosus gold nanoparticles-treated (150 mg/kg body weight through gastric intubation for 30 days), untreated diabetic, metformin-treated diabetic (500 mg/kg/day gastric intubation for 30 days) and the C. speciosus-treated diabetic group. The blood glucose, insulin and testosterone levels as well as oxidants/antioxidants status were assessed in the serum. Gene expression of proinflammatory cytokines TNF-α, IL1β and IL-6 were assessed in the prostate homogenate. At the end of the experiment, the rats were sacrificed and the prostate was dissected out and prepared for histopathological and immunohistochemistry study using Ki67 and Bcl-2. C. Speciosus nanoparticles significantly decreased (p = 0.03) the blood glucose level while significantly increasing insulin (p = 0.01) and testosterone (p = 0.04) levels compared to the untreated diabetic rats. Oxidants/antioxidants status was markedly improved after administration of C. speciosus. Prostatic expression of the mRNA of pro-inflammatory cytokines IL-6, IL1β and TNF-α was down-regulated in metformin- and C. speciosus-treated rats. The histological structure of the ventral prostate was preserved in metformin- and C. speciosus-treated diabetic rats with a significantly thicker epithelial cell layer and significant increase immunoexpression in Bcl-2 and Ki67. In conclusion, the protective effect induced by C. speciosus nanoparticles on the prostate of diabetic rats might be directly mediated through the down-regulation of inflammatory cytokines and the up-regulation of antioxidant activity and indirectly mediated through the anti-hyperglycemic effect through enhancing insulin secretion.
Collapse
|
16
|
Alzhanuly B, Mukhatayev ZY, Botbayev DM, Ashirbekov Y, Katkenov ND, Dzhaynakbaev NT, Sharipov KO. Modulation of Insulin Gene Expression with CRISPR/Cas9-based Transcription Factors. Open Access Maced J Med Sci 2021. [DOI: 10.3889/oamjms.2021.6980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Background: The discovery and use of CRISPR/Cas9 technology have enabled researchers throughout the globe to continuously edit genomes for the benefit of science and medicine. Diabetes type I is one field of medicine where CRISPR/Cas9 has a strong potential for cell therapy development. The long-lasting paucity of healthy cells for clinical transplantation into diabetic patients has led to the search of new methods for producing β-cells from other human cell types. Embryonic stem cells are being studied worldwide as one most promising solution of this need. Aim: The aim of the study is to to check the feasibility of modulating human insulin transcription using CRISPR/Cas9-based synthetic transcription regulation factors.
Results: A new approach for creating potential therapeutic donor cells with enhanced and suppressed insulin production based on one of the latest achievements of human genome editing was developed. Both synthetic transcription activator (VP64) and transcription repressor (KRAB) proteins were shown to function adequately well as a part of the whole CRISPR/Cas9-based system. We claim that our results have a lot to offer and can bring light to many studies where numerous labs are struggling on to treat this disease.
Collapse
|
17
|
Laurenti MC, Matveyenko A, Vella A. Measurement of Pulsatile Insulin Secretion: Rationale and Methodology. Metabolites 2021; 11:409. [PMID: 34206296 PMCID: PMC8305896 DOI: 10.3390/metabo11070409] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/17/2021] [Accepted: 06/18/2021] [Indexed: 12/29/2022] Open
Abstract
Pancreatic β-cells are responsible for the synthesis and exocytosis of insulin in response to an increase in circulating glucose. Insulin secretion occurs in a pulsatile manner, with oscillatory pulses superimposed on a basal secretion rate. Insulin pulses are a marker of β-cell health, and secretory parameters, such as pulse amplitude, time interval and frequency distribution, are impaired in obesity, aging and type 2 diabetes. In this review, we detail the mechanisms of insulin production and β-cell synchronization that regulate pulsatile insulin secretion, and we discuss the challenges to consider when measuring fast oscillatory secretion in vivo. These include the anatomical difficulties of measuring portal vein insulin noninvasively in humans before the hormone is extracted by the liver and quickly removed from the circulation. Peripheral concentrations of insulin or C-peptide, a peptide cosecreted with insulin, can be used to estimate their secretion profile, but mathematical deconvolution is required. Parametric and nonparametric approaches to the deconvolution problem are evaluated, alongside the assumptions and trade-offs required for their application in the quantification of unknown insulin secretory rates from known peripheral concentrations. Finally, we discuss the therapeutical implication of targeting impaired pulsatile secretion and its diagnostic value as an early indicator of β-cell stress.
Collapse
Affiliation(s)
- Marcello C. Laurenti
- Division of Endocrinology, Diabetes & Metabolism, Mayo Clinic, Rochester, MN 55905, USA; (M.C.L.); (A.M.)
- Biomedical Engineering and Physiology Graduate Program, Mayo Clinic Graduate School of Biomedical Sciences, Rochester, MN 55905, USA
| | - Aleksey Matveyenko
- Division of Endocrinology, Diabetes & Metabolism, Mayo Clinic, Rochester, MN 55905, USA; (M.C.L.); (A.M.)
| | - Adrian Vella
- Division of Endocrinology, Diabetes & Metabolism, Mayo Clinic, Rochester, MN 55905, USA; (M.C.L.); (A.M.)
| |
Collapse
|
18
|
MicroRNA-mediated regulation of glucose and lipid metabolism. Nat Rev Mol Cell Biol 2021; 22:425-438. [PMID: 33772227 PMCID: PMC8853826 DOI: 10.1038/s41580-021-00354-w] [Citation(s) in RCA: 160] [Impact Index Per Article: 53.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/16/2021] [Indexed: 02/01/2023]
Abstract
In animals, systemic control of metabolism is conducted by metabolic tissues and relies on the regulated circulation of a plethora of molecules, such as hormones and lipoprotein complexes. MicroRNAs (miRNAs) are a family of post-transcriptional gene repressors that are present throughout the animal kingdom and have been widely associated with the regulation of gene expression in various contexts, including virtually all aspects of systemic control of metabolism. Here we focus on glucose and lipid metabolism and review current knowledge of the role of miRNAs in their systemic regulation. We survey miRNA-mediated regulation of healthy metabolism as well as the contribution of miRNAs to metabolic dysfunction in disease, particularly diabetes, obesity and liver disease. Although most miRNAs act on the tissue they are produced in, it is now well established that miRNAs can also circulate in bodily fluids, including their intercellular transport by extracellular vesicles, and we discuss the role of such extracellular miRNAs in systemic metabolic control and as potential biomarkers of metabolic status and metabolic disease.
Collapse
|
19
|
Hattori H, Hanai Y, Oshima Y, Kataoka H, Eto N. Excessive Intake of High-Fructose Corn Syrup Drinks Induces Impaired Glucose Tolerance. Biomedicines 2021; 9:biomedicines9050541. [PMID: 34066196 PMCID: PMC8150719 DOI: 10.3390/biomedicines9050541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/06/2021] [Accepted: 05/10/2021] [Indexed: 12/19/2022] Open
Abstract
The number of patients with diabetes was approximately 463 million worldwide in 2019, with almost 57.6% of this population concentrated in Asia. Asians often develop type 2 diabetes (T2D), even if they are underweight and consume a smaller amount of food. Soft drinks contain large amounts of sweeteners, such as high-fructose corn syrup (HFCS). Excessive intake of HFCS drinks is considered to be one of the causes of T2D. In the present study, we investigated the effect of excessive consumption of HFCS-water on glucose tolerance and obesity under conditions of controlled caloric intake using a mouse model. Three-week-old male ICR mice were divided into two groups and given free access to 10% HFCS-water or deionized water. The caloric intake was adjusted to be the same in both groups using a standard rodent diet. The excess HFCS-water intake did not lead to obesity, but led to impaired glucose tolerance (IGT) due to insulin-secretion defect. It affected glucose and fructose metabolism; for example, it decreased the expression of glucokinases, ketohexokinase, and glucose transporter 2 in the pancreas. These results suggest that excessive consumption of HFCS drinks, such as soft drinks, without a proper diet, induces nonobese IGT due to insulin-secretion defect.
Collapse
Affiliation(s)
- Hidemi Hattori
- Department of Biochemistry and Applied Biosciences, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuenkibanadai-nishi, Miyazaki 889-2192, Japan; (Y.H.); (Y.O.); (N.E.)
- Correspondence: ; Tel.: +81-985-58-7255
| | - Yuma Hanai
- Department of Biochemistry and Applied Biosciences, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuenkibanadai-nishi, Miyazaki 889-2192, Japan; (Y.H.); (Y.O.); (N.E.)
| | - Yuto Oshima
- Department of Biochemistry and Applied Biosciences, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuenkibanadai-nishi, Miyazaki 889-2192, Japan; (Y.H.); (Y.O.); (N.E.)
| | - Hiroaki Kataoka
- Section of Oncopathology and Regenerative Biology, Department of Pathology, Faculty of Medicine, University of Miyazaki, Miyazaki 889-1692, Japan;
| | - Nozomu Eto
- Department of Biochemistry and Applied Biosciences, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuenkibanadai-nishi, Miyazaki 889-2192, Japan; (Y.H.); (Y.O.); (N.E.)
| |
Collapse
|
20
|
Nakane T, Matsumoto S, Iida S, Ido A, Fukunaga K, Murao K, Sugiyama Y. Candidate plasticity gene 16 and jun dimerization protein 2 are involved in the suppression of insulin gene expression in rat pancreatic INS-1 β-cells. Mol Cell Endocrinol 2021; 527:111240. [PMID: 33676985 DOI: 10.1016/j.mce.2021.111240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 02/24/2021] [Accepted: 03/01/2021] [Indexed: 11/22/2022]
Abstract
Chronic hyperglycemia causes pancreatic β-cell dysfunction, impaired insulin secretion and the suppression of insulin gene expression. This phenomenon is referred to as glucotoxicity, and is a critical component of the pathogenesis of type 2 diabetes. We previously reported that the expression of candidate plasticity gene 16 (CPG16) was higher in rat pancreatic INS-1 β-cells under glucotoxic conditions and CPG16 suppressed insulin promoter activity. However, the molecular mechanisms of the CPG16-mediated suppression of insulin gene expression are unclear. In this study, we found that CPG16 directly bound and phosphorylated jun dimerization protein 2 (JDP2), an AP-1 family transcription factor. CPG16 co-localized with JDP2 in the nucleus of INS-1 cells. JDP2 bound to the G1 element of the insulin promoter and up-regulated promoter activity. Finally, CPG16 suppressed the up-regulation of insulin promoter activity by JDP2 in a kinase activity-dependent manner. These results suggest that CPG16 suppresses insulin promoter activity by phosphorylating JDP2.
Collapse
Affiliation(s)
- Tatsuto Nakane
- Department of Life Sciences, Faculty of Agriculture, Kagawa University, Kagawa, Japan
| | - Suzuka Matsumoto
- Department of Life Sciences, Faculty of Agriculture, Kagawa University, Kagawa, Japan
| | - Satoshi Iida
- Department of Life Sciences, Faculty of Agriculture, Kagawa University, Kagawa, Japan
| | - Ayae Ido
- Department of Life Sciences, Faculty of Agriculture, Kagawa University, Kagawa, Japan
| | - Kensaku Fukunaga
- Department of Endocrinology and Metabolism, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Koji Murao
- Department of Endocrinology and Metabolism, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Yasunori Sugiyama
- Department of Life Sciences, Faculty of Agriculture, Kagawa University, Kagawa, Japan.
| |
Collapse
|
21
|
Akerman I, Maestro MA, De Franco E, Grau V, Flanagan S, García-Hurtado J, Mittler G, Ravassard P, Piemonti L, Ellard S, Hattersley AT, Ferrer J. Neonatal diabetes mutations disrupt a chromatin pioneering function that activates the human insulin gene. Cell Rep 2021; 35:108981. [PMID: 33852861 PMCID: PMC8052186 DOI: 10.1016/j.celrep.2021.108981] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 01/04/2021] [Accepted: 03/23/2021] [Indexed: 12/18/2022] Open
Abstract
Despite the central role of chromosomal context in gene transcription, human noncoding DNA variants are generally studied outside of their genomic location. This limits our understanding of disease-causing regulatory variants. INS promoter mutations cause recessive neonatal diabetes. We show that all INS promoter point mutations in 60 patients disrupt a CC dinucleotide, whereas none affect other elements important for episomal promoter function. To model CC mutations, we humanized an ∼3.1-kb region of the mouse Ins2 gene. This recapitulated developmental chromatin states and cell-specific transcription. A CC mutant allele, however, abrogated active chromatin formation during pancreas development. A search for transcription factors acting through this element revealed that another neonatal diabetes gene product, GLIS3, has a pioneer-like ability to derepress INS chromatin, which is hampered by the CC mutation. Our in vivo analysis, therefore, connects two human genetic defects in an essential mechanism for developmental activation of the INS gene.
Collapse
Affiliation(s)
- Ildem Akerman
- Institute of Metabolism and Systems Research (IMSR), Medical School, University of Birmingham, Birmingham, UK; Centre for Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Birmingham, UK.
| | - Miguel Angel Maestro
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona 08003, Spain; Centro de Investigación Biomédica en red Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Elisa De Franco
- Institute of Biomedical and Clinical Science, University of Exeter Medical School, Exeter, UK
| | - Vanessa Grau
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona 08003, Spain; Centro de Investigación Biomédica en red Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Sarah Flanagan
- Institute of Biomedical and Clinical Science, University of Exeter Medical School, Exeter, UK
| | - Javier García-Hurtado
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona 08003, Spain; Centro de Investigación Biomédica en red Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Gerhard Mittler
- Max-Planck Institute for Immunobiology and Epigenetics, Freiburg, Germany
| | - Philippe Ravassard
- INSERM, CNRS, Paris Brain Institute - Hôpital Pitié-Salpêtrière, Paris, France
| | - Lorenzo Piemonti
- Diabetes Research Institute, IRCCS Ospedale San Raffaele and Università Vita-Salute San Raffaele, Milan, Italy
| | - Sian Ellard
- Institute of Biomedical and Clinical Science, University of Exeter Medical School, Exeter, UK; Exeter Genomics Laboratory, Royal Devon and Exeter NHS Foundation Trust, Exeter, UK
| | - Andrew T Hattersley
- Institute of Biomedical and Clinical Science, University of Exeter Medical School, Exeter, UK
| | - Jorge Ferrer
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona 08003, Spain; Centro de Investigación Biomédica en red Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain; Section of Genetics and Genomics, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK.
| |
Collapse
|
22
|
Zhang X, Wang X, Yuan Z, Radford SJ, Liu C, Libutti SK, Zheng XFS. Amino acids-Rab1A-mTORC1 signaling controls whole-body glucose homeostasis. Cell Rep 2021; 34:108830. [PMID: 33730578 PMCID: PMC8062038 DOI: 10.1016/j.celrep.2021.108830] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 12/28/2020] [Accepted: 02/16/2021] [Indexed: 12/17/2022] Open
Abstract
Rab1A is a small GTPase known for its role in vesicular trafficking. Recent evidence indicates that Rab1A is essential for amino acids (aas) sensing and signaling to regulate mTORC1 in normal and cancer cells. However, Rab1A's in vivo function in mammals is not known. Here, we report the generation of tamoxifen (TAM)-induced whole body Rab1A knockout (Rab1A-/-) in adult mice. Rab1A-/- mice are viable but become hyperglycemic and glucose intolerant due to impaired insulin transcription and β-cell proliferation and maintenance. Mechanistically, Rab1A mediates AA-mTORC1 signaling, particularly branched chain amino acids (BCAA), to regulate the stability and localization of the insulin transcription factor Pdx1. Collectively, these results reveal a physiological role of aa-Rab1A-mTORC1 signaling in the control of whole-body glucose homeostasis in mammals. Intriguingly, Rab1A expression is reduced in β-cells of type 2 diabetes (T2D) patients, which is correlated with loss of insulin expression, suggesting that Rab1A downregulation contributes to T2D progression.
Collapse
Affiliation(s)
- Xin Zhang
- Rutgers Cancer Institute of New Jersey, Rutgers, The State University of New Jersey, 195 Little Albany Street, New Brunswick, NJ 08901, USA; Department of Pharmacology, Robert Wood Johnson Medical School, Rutgers, the State University of New Jersey, 675 Hoes Lane, Piscataway, NJ 08854, USA
| | - Xiaowen Wang
- Rutgers Cancer Institute of New Jersey, Rutgers, The State University of New Jersey, 195 Little Albany Street, New Brunswick, NJ 08901, USA; Department of Pharmacology, Robert Wood Johnson Medical School, Rutgers, the State University of New Jersey, 675 Hoes Lane, Piscataway, NJ 08854, USA
| | - Ziqiang Yuan
- Rutgers Cancer Institute of New Jersey, Rutgers, The State University of New Jersey, 195 Little Albany Street, New Brunswick, NJ 08901, USA; Department of Surgery, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, 195 Little Albany Street, New Brunswick, NJ 08901, USA
| | - Sarah J Radford
- Rutgers Cancer Institute of New Jersey, Rutgers, The State University of New Jersey, 195 Little Albany Street, New Brunswick, NJ 08901, USA
| | - Chen Liu
- Department of Pathology and Laboratory Medicine, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, 195 Little Albany Street, New Brunswick, NJ 08901, USA
| | - Steven K Libutti
- Rutgers Cancer Institute of New Jersey, Rutgers, The State University of New Jersey, 195 Little Albany Street, New Brunswick, NJ 08901, USA; Department of Surgery, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, 195 Little Albany Street, New Brunswick, NJ 08901, USA
| | - X F Steven Zheng
- Rutgers Cancer Institute of New Jersey, Rutgers, The State University of New Jersey, 195 Little Albany Street, New Brunswick, NJ 08901, USA; Department of Pharmacology, Robert Wood Johnson Medical School, Rutgers, the State University of New Jersey, 675 Hoes Lane, Piscataway, NJ 08854, USA.
| |
Collapse
|
23
|
González-Moro I, Santin I. Long non-coding RNA-regulated pathways in pancreatic β cells: Their role in diabetes. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2021; 359:325-355. [PMID: 33832652 DOI: 10.1016/bs.ircmb.2021.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Long non-coding RNAs (lncRNAs) are transcripts of more than 200 nucleotides that have not coding potential, but act as gene expression regulators through several molecular mechanisms. Several studies have identified tons of lncRNAs that are expressed in pancreatic β cells and many of them have been shown to have β cell-specific expression, suggesting a potential role in the regulation of basal β cell functions. Indeed, accumulating evidence based on numerous studies, has highlighted the implication of lncRNAs in the regulation of pancreatic β cell differentiation and proliferation, insulin synthesis and secretion, and apoptosis. In addition, several lncRNAs have shown to be implicated in pancreatic β cell dysfunction linked to different types of diabetes, including type 1 and type 2 diabetes, and monogenic forms of the disease. Pathogenic conditions linked to diabetes (inflammation or lipoglucotoxicity, for example) dysregulate the expression of several lncRNAs, suggesting that changes in lncRNA may alter potentially important pathways for β cell function, and eventually leading to β cell dysfunction and diabetes development. In this sense, functional characterization of some lncRNAs has demonstrated that these non-coding molecules participate in the regulation of several crucial pathways at the pancreatic β cell level, and dysregulation of these pathways leads to pathogenic phenotypes. In this review, we provide an overview of the action mechanisms of functionally characterized lncRNAs in healthy β cells and describe the contribution of some diabetes-associated lncRNAs to pancreatic β cell failure.
Collapse
Affiliation(s)
- Itziar González-Moro
- Department of Biochemistry and Molecular biology, University of the Basque Country, Leioa, Spain; Biocruces Bizkaia Health Research Institute, Barakaldo, Spain
| | - Izortze Santin
- Department of Biochemistry and Molecular biology, University of the Basque Country, Leioa, Spain; Biocruces Bizkaia Health Research Institute, Barakaldo, Spain; CIBER (Centro de Investigación Biomédica en Red) de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Instituto de Salud Carlos III, Madrid, Spain.
| |
Collapse
|
24
|
Abazari MF, Zare Karizi S, Hajati-Birgani N, Norouzi S, Khazeni Z, Hashemi J, Shafaghi L, Soleimanifar F, Mansour RN, Enderami SE. PHBV nanofibers promotes insulin-producing cells differentiation of human induced pluripotent stem cells. Gene 2020; 768:145333. [PMID: 33278553 DOI: 10.1016/j.gene.2020.145333] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 11/27/2020] [Indexed: 02/06/2023]
Abstract
Tissue-engineering associated techniques have long been employed to improve the various elements of the therapeutic approaches toward the more efficient ones in diabetic states. The resultant constructs comprise of the polymeric scaffolds with proper degradation rates that produce bodily compatible components, and the pluripotent cells that are highly capable of generating islet-like cells. In this study, Poly-(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) nanofibers were fabricated by the Electrospinning. After validation of its 3-D structure, fibers size and non-toxicity, insulin-producing cells (IPC) differentiation potential of the induced pluripotent stem cells (iPSCs) were evaluated during growing on the PHBV nanofibers in comparison with tissue culture polystyrene (TCPS). SEM analyses confirmed the 3-D and nanofibrous structure of the fabricated scaffold. The survival rate of the iPSCs cultured on the PHBV nanofibers was increased significantly compared to the cells cultured on the TCPS, which is an evidence for the non-toxicity of the nanofibers. Insulin and C-peptide secretion levels significantly increased in the differentiated iPSCs on PHBV nanofibers compared to those cells cultured on TCPS. Moreover, levels of the gene transcription and translation results revealed that insulin, Glut-2, and Pdx-1 genes and insulin protein, in IPC-differentiated iPSCs grown on PHBV nanofibers are significantly higher than those cells grown on TCPS. Taken together, these results go beyond previous reports, showing thatiPSCs-PHBV as a promising cell-copolymer construct, could potentially be applied in the pancreatic tissue engineering applications to diabetic patient treatment.
Collapse
Affiliation(s)
- Mohammad Foad Abazari
- Research Center for Clinical Virology, Tehran University of Medical Sciences, Tehran, Iran
| | - Shohreh Zare Karizi
- Department of Biology, Varamin Pishva Branch, Islamic Azad University, Pishva, Varamin, Iran
| | - Nazanin Hajati-Birgani
- Department of Biology, Faculty of Science and Reseach, Islamic Azad University, Tehran, Iran
| | - Sara Norouzi
- Department of Biology, Faculty of Science and Reseach, Islamic Azad University, Tehran, Iran
| | - Zahraalsadat Khazeni
- Department of Biology, Varamin Pishva Branch, Islamic Azad University, Pishva, Varamin, Iran
| | - Javad Hashemi
- Department of Pathobiology and laboratory Sciences, School of Medicine, North Khorasan University of Medical Sciences, Bojnurd, Iran
| | - Lida Shafaghi
- Department of Neuroscience and Addiction Studies, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Soleimanifar
- Department of Medical Biotechnology, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
| | | | - Seyed Ehsan Enderami
- Immunogenetics Research Center, Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Mazandaran University of Medical Sciences, Sari, Iran.
| |
Collapse
|
25
|
Bernard H, Teijeiro A, Chaves-Pérez A, Perna C, Satish B, Novials A, Wang JP, Djouder N. Coxsackievirus B Type 4 Infection in β Cells Downregulates the Chaperone Prefoldin URI to Induce a MODY4-like Diabetes via Pdx1 Silencing. CELL REPORTS MEDICINE 2020; 1:100125. [PMID: 33205075 PMCID: PMC7659558 DOI: 10.1016/j.xcrm.2020.100125] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 08/06/2020] [Accepted: 09/22/2020] [Indexed: 12/17/2022]
Abstract
Enteroviruses are suspected to contribute to insulin-producing β cell loss and hyperglycemia-induced diabetes. However, mechanisms are not fully defined. Here, we show that coxsackievirus B type 4 (CVB4) infection in human islet-engrafted mice and in rat insulinoma cells displays loss of unconventional prefoldin RPB5 interactor (URI) and PDX1, affecting β cell function and identity. Genetic URI ablation in the mouse pancreas causes PDX1 depletion in β cells. Importantly, diabetic PDX1 heterozygous mice overexpressing URI in β cells are more glucose tolerant. Mechanistically, URI loss triggers estrogen receptor nuclear translocation leading to DNA methyltransferase 1 (DNMT1) expression, which induces Pdx1 promoter hypermethylation and silencing. Consequently, demethylating agent procainamide-mediated DNMT1 inhibition reinstates PDX1 expression and protects against diabetes in pancreatic URI-depleted mice . Finally, the β cells of human diabetes patients show correlations between viral protein 1 and URI, PDX1, and DNMT1 levels. URI and DNMT1 expression and PDX1 silencing provide a causal link between enterovirus infection and diabetes. Coxsackievirus B type 4 infection downregulates URI and affects β cell function Genetic URI ablation in mouse pancreas recapitulates diabetes URI controls Pdx1 methylation via ERα-activating DNMT1 Coxsackievirus B type 4, URI, PDX1, and DNMT1 expression correlate in human pancreata
Collapse
MESH Headings
- Animals
- Capsid Proteins/genetics
- Capsid Proteins/metabolism
- Coxsackievirus Infections/genetics
- Coxsackievirus Infections/metabolism
- Coxsackievirus Infections/pathology
- Coxsackievirus Infections/virology
- DNA (Cytosine-5-)-Methyltransferase 1/antagonists & inhibitors
- DNA (Cytosine-5-)-Methyltransferase 1/genetics
- DNA (Cytosine-5-)-Methyltransferase 1/metabolism
- Diabetes Mellitus, Type 2/genetics
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/pathology
- Diabetes Mellitus, Type 2/virology
- Disease Models, Animal
- Enterovirus B, Human/genetics
- Enterovirus B, Human/metabolism
- Enterovirus B, Human/pathogenicity
- Female
- Gene Expression Regulation
- Glucose/metabolism
- Glucose/pharmacology
- Homeodomain Proteins/genetics
- Homeodomain Proteins/metabolism
- Humans
- Insulin-Secreting Cells/drug effects
- Insulin-Secreting Cells/metabolism
- Insulin-Secreting Cells/pathology
- Insulin-Secreting Cells/transplantation
- Male
- Mice
- Mice, Transgenic
- Procainamide/pharmacology
- Rats
- Repressor Proteins/genetics
- Repressor Proteins/metabolism
- Signal Transduction
- Trans-Activators/genetics
- Trans-Activators/metabolism
- Transplantation, Heterologous
Collapse
Affiliation(s)
- Hugo Bernard
- Molecular Oncology Programme, Growth Factors, Nutrients and Cancer Group, Centro Nacional de Investigaciones Oncológicas, CNIO, Madrid 28029, Spain
| | - Ana Teijeiro
- Molecular Oncology Programme, Growth Factors, Nutrients and Cancer Group, Centro Nacional de Investigaciones Oncológicas, CNIO, Madrid 28029, Spain
| | - Almudena Chaves-Pérez
- Molecular Oncology Programme, Growth Factors, Nutrients and Cancer Group, Centro Nacional de Investigaciones Oncológicas, CNIO, Madrid 28029, Spain
| | - Cristian Perna
- Department of Pathology, Hospital Universitario Ramón y Cajal, IRYCIS, Madrid 28034, Spain
| | - Basanthi Satish
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Anna Novials
- IDIBAPS, August Pi i Sunyer Biomedical Research Institute and, CIBERDEM, Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders, Barcelona, Spain
| | - Jennifer P. Wang
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Nabil Djouder
- Molecular Oncology Programme, Growth Factors, Nutrients and Cancer Group, Centro Nacional de Investigaciones Oncológicas, CNIO, Madrid 28029, Spain
- Corresponding author
| |
Collapse
|
26
|
Das D, Das A, Sahu M, Mishra SS, Khan S, Bejugam PR, Rout PK, Das A, Bano S, Mishra GP, Raghav SK, Dixit A, Panda AC. Identification and Characterization of Circular Intronic RNAs Derived from Insulin Gene. Int J Mol Sci 2020; 21:ijms21124302. [PMID: 32560282 PMCID: PMC7352490 DOI: 10.3390/ijms21124302] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/02/2020] [Accepted: 06/09/2020] [Indexed: 01/09/2023] Open
Abstract
Circular RNAs (circRNAs) are a large family of noncoding RNAs that have emerged as novel regulators of gene expression. However, little is known about the function of circRNAs in pancreatic β-cells. Here, transcriptomic analysis of mice pancreatic islet RNA-sequencing data identified 77 differentially expressed circRNAs between mice fed with a normal diet and a high-fat diet. Surprisingly, multiple circRNAs were derived from the intron 2 of the preproinsulin 2 (Ins2) gene and are termed as circular intronic (ci)-Ins2. The expression of ci-Ins2 transcripts in mouse pancreatic islets, and βTC6 cells were confirmed by reverse transcription PCR, DNA sequencing, and RNase R treatment experiments. The level of ci-Ins2 was altered in βTC6 cells upon exposure to elevated levels of palmitate and glucose. Computational analysis predicted the interaction of several RNA-binding proteins with ci-Ins2 and their flanking region, suggesting their role in the ci-Ins2 function or biogenesis. Additionally, bioinformatics analysis predicted the association of several microRNAs with ci-Ins2. Gene ontology and pathway analysis of genes targeted by miRNAs associated with ci-Ins2 suggested the regulation of several key biological processes. Together, our findings indicate that differential expression of circRNAs, especially ci-Ins2 transcripts, may regulate β-cell function and may play a critical role in the development of diabetes.
Collapse
Affiliation(s)
- Debojyoti Das
- Institute of Life Sciences (ILS), Nalco Square, Bhubaneswar, Odisha 751023, India; (D.D.); (A.D.); (M.S.); (S.S.M.); (S.K.); (P.R.B.); (P.K.R.); (A.D.); (G.P.M.); (S.K.R.); (A.D.)
- School of Biotechnology, KIIT University, Bhubaneswar, Odisha 751024, India
| | - Aniruddha Das
- Institute of Life Sciences (ILS), Nalco Square, Bhubaneswar, Odisha 751023, India; (D.D.); (A.D.); (M.S.); (S.S.M.); (S.K.); (P.R.B.); (P.K.R.); (A.D.); (G.P.M.); (S.K.R.); (A.D.)
- School of Biotechnology, KIIT University, Bhubaneswar, Odisha 751024, India
| | - Mousumi Sahu
- Institute of Life Sciences (ILS), Nalco Square, Bhubaneswar, Odisha 751023, India; (D.D.); (A.D.); (M.S.); (S.S.M.); (S.K.); (P.R.B.); (P.K.R.); (A.D.); (G.P.M.); (S.K.R.); (A.D.)
| | - Smruti Sambhav Mishra
- Institute of Life Sciences (ILS), Nalco Square, Bhubaneswar, Odisha 751023, India; (D.D.); (A.D.); (M.S.); (S.S.M.); (S.K.); (P.R.B.); (P.K.R.); (A.D.); (G.P.M.); (S.K.R.); (A.D.)
| | - Shaheerah Khan
- Institute of Life Sciences (ILS), Nalco Square, Bhubaneswar, Odisha 751023, India; (D.D.); (A.D.); (M.S.); (S.S.M.); (S.K.); (P.R.B.); (P.K.R.); (A.D.); (G.P.M.); (S.K.R.); (A.D.)
| | - Pruthvi R. Bejugam
- Institute of Life Sciences (ILS), Nalco Square, Bhubaneswar, Odisha 751023, India; (D.D.); (A.D.); (M.S.); (S.S.M.); (S.K.); (P.R.B.); (P.K.R.); (A.D.); (G.P.M.); (S.K.R.); (A.D.)
| | - Pranita K. Rout
- Institute of Life Sciences (ILS), Nalco Square, Bhubaneswar, Odisha 751023, India; (D.D.); (A.D.); (M.S.); (S.S.M.); (S.K.); (P.R.B.); (P.K.R.); (A.D.); (G.P.M.); (S.K.R.); (A.D.)
| | - Arundhati Das
- Institute of Life Sciences (ILS), Nalco Square, Bhubaneswar, Odisha 751023, India; (D.D.); (A.D.); (M.S.); (S.S.M.); (S.K.); (P.R.B.); (P.K.R.); (A.D.); (G.P.M.); (S.K.R.); (A.D.)
- School of Biotechnology, KIIT University, Bhubaneswar, Odisha 751024, India
| | - Shehnaz Bano
- National Center for Cell Sciences (NCCS), Pune, Maharashtra 411007, India;
| | - Gyan Prakash Mishra
- Institute of Life Sciences (ILS), Nalco Square, Bhubaneswar, Odisha 751023, India; (D.D.); (A.D.); (M.S.); (S.S.M.); (S.K.); (P.R.B.); (P.K.R.); (A.D.); (G.P.M.); (S.K.R.); (A.D.)
| | - Sunil K. Raghav
- Institute of Life Sciences (ILS), Nalco Square, Bhubaneswar, Odisha 751023, India; (D.D.); (A.D.); (M.S.); (S.S.M.); (S.K.); (P.R.B.); (P.K.R.); (A.D.); (G.P.M.); (S.K.R.); (A.D.)
| | - Anshuman Dixit
- Institute of Life Sciences (ILS), Nalco Square, Bhubaneswar, Odisha 751023, India; (D.D.); (A.D.); (M.S.); (S.S.M.); (S.K.); (P.R.B.); (P.K.R.); (A.D.); (G.P.M.); (S.K.R.); (A.D.)
| | - Amaresh C. Panda
- Institute of Life Sciences (ILS), Nalco Square, Bhubaneswar, Odisha 751023, India; (D.D.); (A.D.); (M.S.); (S.S.M.); (S.K.); (P.R.B.); (P.K.R.); (A.D.); (G.P.M.); (S.K.R.); (A.D.)
- Correspondence: ; Tel.: +91-674-230-43-14
| |
Collapse
|
27
|
Noguchi H, Miyagi-Shiohira C, Nakashima Y, Kinjo T, Saitoh I, Watanabe M. Mutations in the C1 element of the insulin promoter lead to diabetic phenotypes in homozygous mice. Commun Biol 2020; 3:309. [PMID: 32546815 PMCID: PMC7297962 DOI: 10.1038/s42003-020-1040-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 05/28/2020] [Indexed: 11/09/2022] Open
Abstract
Genome editing technologies such as CRISPR-Cas9 are widely used to establish causal associations between mutations and phenotypes. However, CRISPR-Cas9 is rarely used to analyze promoter regions. The insulin promoter region (approximately 1,000 bp) directs β cell-specific expression of insulin, which in vitro studies show is regulated by ubiquitous, as well as pancreatic, β cell-specific transcription factors. However, we are unaware of any confirmatory in vivo studies. Here, we used CRISPR-Cas9 technology to generate mice with mutations in the promoter regions of the insulin I (Ins1) and II (Ins2) genes. We generated 4 homozygous diabetic mice with 2 distinct mutations in the highly conserved C1 elements in each of the Ins1 and Ins2 promoters (3 deletions and 1 replacement in total). Remarkably, all mice with homozygous or heterozygous mutations in other loci were not diabetic. Thus, the C1 element in mice is required for Ins transcription in vivo.
Collapse
Affiliation(s)
- Hirofumi Noguchi
- Department of Regenerative Medicine, Graduate School of Medicine, University of the Ryukyus, Okinawa, 903-0215, Japan.
| | - Chika Miyagi-Shiohira
- Department of Regenerative Medicine, Graduate School of Medicine, University of the Ryukyus, Okinawa, 903-0215, Japan
| | - Yoshiki Nakashima
- Department of Regenerative Medicine, Graduate School of Medicine, University of the Ryukyus, Okinawa, 903-0215, Japan
| | - Takao Kinjo
- Department of Basic Laboratory Sciences, School of Health Sciences, Faculty of Medicine, University of the Ryukyus, Okinawa, 903-0215, Japan
| | - Issei Saitoh
- Division of Pediatric Dentistry, Graduate School of Medical and Dental Science, Niigata University, Niigata, 951-8514, Japan
| | - Masami Watanabe
- Department of Urology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan
| |
Collapse
|
28
|
Maugein A, Diedisheim M, Bailly K, Scharfmann R, Albagli O. The RB gene family controls the maturation state of the EndoC-βH2 human pancreatic β-cells. Differentiation 2020; 113:1-9. [PMID: 32120156 DOI: 10.1016/j.diff.2020.02.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 02/17/2020] [Accepted: 02/17/2020] [Indexed: 01/18/2023]
Abstract
The functional maturation of human pancreatic β-cells remains poorly understood. EndoC-βH2 is a human β-cell line with a reversible immortalized phenotype. Removal of the two oncogenes, SV40LT and hTERT introduced for its propagation, stops proliferation, triggers cell size increase and senescence, promotes mitochondrial activity and amplifies several β-cell traits and functions. Overall, these events recapitulate several aspects of functional β-cell maturation. We report here that selective depletion of SV40LT, but not of hTERT, is sufficient to revert EndoC-βH2 immortalization. SV40LT inhibits the activity of the RB family members and of P53. In EndoC-βH2 cells, the knock-down of RB itself, and, to a lesser extent, of its relative P130, precludes most events triggered by SV40LT depletion. In contrast, the knock-down of P53 does not prevent reversion of immortalization. Thus, an increase in RB and P130 activity, but not in P53 activity, is required for functional maturation of EndoC-βH2 cells upon SV40LT-depletion. In addition, RB and/or P130 depletion in SV40LT-expressing EndoC-βH2 cells decreases cell size, stimulates proliferation, and decreases the expression of key β-cell genes. Thus, despite SV40LT expression, EndoC-βH2 cells have a residual RB activity, which when suppressed reverts them to a more immature phenotype. These results show that the expression and activity levels of RB family members, especially RB itself, regulate the maturation state of EndoC-βH2 cells.
Collapse
Affiliation(s)
- Alicia Maugein
- Paris University, Institut Cochin, INSERM, U1016, CNRS, UMR8104, 75014, Paris, France
| | - Marc Diedisheim
- Assistance Publique - Hôpitaux de Paris, Diabetology Department, Paris University, Cochin Hospital, and INSERM, UMRS 1138, Centre de Recherche des Cordeliers, Paris University, 75006, Paris, France
| | - Karine Bailly
- Paris University, Institut Cochin, INSERM, U1016, CNRS, UMR8104, 75014, Paris, France
| | - Raphaël Scharfmann
- Paris University, Institut Cochin, INSERM, U1016, CNRS, UMR8104, 75014, Paris, France
| | - Olivier Albagli
- Paris University, Institut Cochin, INSERM, U1016, CNRS, UMR8104, 75014, Paris, France.
| |
Collapse
|
29
|
Agbu P, Cassidy JJ, Braverman J, Jacobson A, Carthew RW. MicroRNA miR-7 Regulates Secretion of Insulin-Like Peptides. Endocrinology 2020; 161:5686887. [PMID: 31875904 PMCID: PMC7029775 DOI: 10.1210/endocr/bqz040] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 12/20/2019] [Indexed: 01/01/2023]
Abstract
The insulin/insulin-like growth factor (IGF) pathway is essential for linking nutritional status to growth and metabolism. MicroRNAs (miRNAs) are short RNAs that are players in the regulation of this process. The miRNA miR-7 shows highly conserved expression in insulin-producing cells across the animal kingdom. However, its conserved functions in regulation of insulin-like peptides (ILPs) remain unknown. Using Drosophila as a model, we demonstrate that miR-7 limits ILP availability by inhibiting its production and secretion. Increasing miR-7 alters body growth and metabolism in an ILP-dependent manner, elevating circulating sugars and total body triglycerides, while decreasing animal growth. These effects are not due to direct targeting of ILP mRNA, but instead arise through alternate targets that affect the function of ILP-producing cells. The Drosophila F-actin capping protein alpha (CPA) is a direct target of miR-7, and knockdown of CPA in insulin-producing cells phenocopies the effects of miR-7 on ILP secretion. This regulation of CPA is conserved in mammals, with the mouse ortholog Capza1 also targeted by miR-7 in β-islet cells. Taken together, these results support a role for miR-7 regulation of an actin capping protein in insulin regulation, and highlight a conserved mechanism of action for an evolutionarily ancient microRNA.
Collapse
Affiliation(s)
- Pamela Agbu
- Department of Molecular Biosciences, Northwestern University, Evanston, Illinois
| | - Justin J Cassidy
- Department of Molecular Biosciences, Northwestern University, Evanston, Illinois
| | - Jonathan Braverman
- Department of Molecular Biosciences, Northwestern University, Evanston, Illinois
| | - Alec Jacobson
- Department of Molecular Biosciences, Northwestern University, Evanston, Illinois
| | - Richard W Carthew
- Department of Molecular Biosciences, Northwestern University, Evanston, Illinois
- NSF-Simons Center for Quantitative Biology, Northwestern University, Evanston, Illinois
- Correspondence: Richard W. Carthew, PhD, Department of Molecular Biosciences, Northwestern University, Evanston, IL 60208. E-mail:
| |
Collapse
|
30
|
Scharfmann R, Staels W, Albagli O. The supply chain of human pancreatic β cell lines. J Clin Invest 2019; 129:3511-3520. [PMID: 31478912 PMCID: PMC6715382 DOI: 10.1172/jci129484] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Patients with type 1 or type 2 diabetes have an insufficiency in their functional β cell mass. To advance diabetes treatment and to work toward a cure, a better understanding of how to protect the pancreatic β cells against autoimmune or metabolic assaults (e.g., obesity, gestation) will be required. Over the past decades, β cell protection has been extensively investigated in rodents both in vivo and in vitro using isolated islets or rodent β cell lines. Transferring these rodent data to humans has long been challenging, at least partly for technical reasons: primary human islet preparations were scarce and functional human β cell lines were lacking. In 2011, we described a robust protocol of targeted oncogenesis in human fetal pancreas and produced the first functional human β cell line, and in subsequent years additional lines with specific traits. These cell lines are currently used by more than 150 academic and industrial laboratories worldwide. In this Review, we first explain how we developed the human β cell lines and why we think we succeeded where others, despite major efforts, did not. Next, we discuss the use of such functional human β cell lines and share some perspectives on their use to advance diabetes research.
Collapse
Affiliation(s)
- Raphael Scharfmann
- INSERM U1016, Institut Cochin, Université Paris Descartes, Paris, France
| | - Willem Staels
- INSERM U1016, Institut Cochin, Université Paris Descartes, Paris, France
- Beta Cell Neogenesis (BENE), Vrije Universiteit Brussel, Brussels, Belgium
| | - Olivier Albagli
- INSERM U1016, Institut Cochin, Université Paris Descartes, Paris, France
| |
Collapse
|
31
|
Liu L, Liang C, Mei P, Zhu H, Hou M, Yu C, Song Z, Bao Y, Huang Y, Yi J, Wang S, Wu Y, Zheng L, Sun Y, Wang G, Huo M, Yang S, Sun L, Li Y. Dracorhodin perchlorate protects pancreatic β-cells against glucotoxicity- or lipotoxicity-induced dysfunction and apoptosis in vitro and in vivo. FEBS J 2019; 286:3718-3736. [PMID: 31349381 DOI: 10.1111/febs.15020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 05/18/2019] [Accepted: 07/24/2019] [Indexed: 12/11/2022]
Abstract
Glucotoxicity or lipotoxicity leads to hyperglycemia and insulin secretion deficiency, which are important causes for the onset of type 2 diabetes mellitus (T2DM). Thus, the restoration of β-cell function is a long-sought goal in diabetes research. Previous studies have implicated pancreatic and duodenal homeobox 1 gene (Pdx1) in β-cell function and insulin secretion. In this study, we established a Pdx1 promoter-dependent luciferase system and identified the natural compound dracorhodin perchlorate (DP) as an effective promotor of Pdx1 expression. We further demonstrated that DP could significantly inhibit β-cell apoptosis induced by 33 mm glucose or 200 μm palmitate by interfering with endoplasmic reticulum stress and mitochondrial pathways and enhance insulin secretion as well. These effects were associated with enhanced activities of Erk1/2, which in turn promoted Pdx1 expression and increased the ratio of Bcl2/Bax, since inhibition of the Erk1/2 pathway abolished the DP-induced expression of Pdx1 and suppression of apoptosis. In addition, our in vivo results in diabetic mice indicated that DP treatment lowered blood glucose, raised insulin levels, enhanced Pdx1 expression and increased islet size and number in the pancreas of diabetic mice. Our findings suggest that Pdx1 is a potential target molecule of DP in the treatment of T2DM via the inhibition of glucotoxicity- or lipotoxicity- induced β-cell apoptosis and the attenuation of insulin secretion dysfunction.
Collapse
Affiliation(s)
- Lei Liu
- Research Center of Agriculture and Medicine gene Engineering of Ministry of Education, Northeast Normal University, Changchun, China
| | - Chen Liang
- National Engineering Laboratory for Druggable Gene and Protein Screening, Northeast Normal University, Changchun, China
| | - Pucheng Mei
- National Engineering Laboratory for Druggable Gene and Protein Screening, Northeast Normal University, Changchun, China
| | - Hong Zhu
- National Engineering Laboratory for Druggable Gene and Protein Screening, Northeast Normal University, Changchun, China
| | - Meiling Hou
- Research Center of Agriculture and Medicine gene Engineering of Ministry of Education, Northeast Normal University, Changchun, China
| | - Chunlei Yu
- Research Center of Agriculture and Medicine gene Engineering of Ministry of Education, Northeast Normal University, Changchun, China
| | - Zhenbo Song
- National Engineering Laboratory for Druggable Gene and Protein Screening, Northeast Normal University, Changchun, China
| | - Yongli Bao
- National Engineering Laboratory for Druggable Gene and Protein Screening, Northeast Normal University, Changchun, China
| | - Yanxin Huang
- National Engineering Laboratory for Druggable Gene and Protein Screening, Northeast Normal University, Changchun, China
| | - Jingwen Yi
- Research Center of Agriculture and Medicine gene Engineering of Ministry of Education, Northeast Normal University, Changchun, China
| | - Shuyue Wang
- National Engineering Laboratory for Druggable Gene and Protein Screening, Northeast Normal University, Changchun, China
| | - Yin Wu
- National Engineering Laboratory for Druggable Gene and Protein Screening, Northeast Normal University, Changchun, China
| | - Lihua Zheng
- National Engineering Laboratory for Druggable Gene and Protein Screening, Northeast Normal University, Changchun, China
| | - Ying Sun
- Research Center of Agriculture and Medicine gene Engineering of Ministry of Education, Northeast Normal University, Changchun, China
| | - Guannan Wang
- National Engineering Laboratory for Druggable Gene and Protein Screening, Northeast Normal University, Changchun, China
| | - Mingxin Huo
- School of Environment, Northeast Normal University, Changchun, China
| | - Shaonian Yang
- National Engineering Laboratory for Druggable Gene and Protein Screening, Northeast Normal University, Changchun, China.,The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institutet, Stockholm, Sweden
| | - Luguo Sun
- National Engineering Laboratory for Druggable Gene and Protein Screening, Northeast Normal University, Changchun, China
| | - Yuxin Li
- Research Center of Agriculture and Medicine gene Engineering of Ministry of Education, Northeast Normal University, Changchun, China
| |
Collapse
|
32
|
Acosta-Montaño P, Rodríguez-Velázquez E, Ibarra-López E, Frayde-Gómez H, Mas-Oliva J, Delgado-Coello B, Rivero IA, Alatorre-Meda M, Aguilera J, Guevara-Olaya L, García-González V. Fatty Acid and Lipopolysaccharide Effect on Beta Cells Proteostasis and its Impact on Insulin Secretion. Cells 2019; 8:cells8080884. [PMID: 31412623 PMCID: PMC6721695 DOI: 10.3390/cells8080884] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 08/02/2019] [Accepted: 08/06/2019] [Indexed: 02/07/2023] Open
Abstract
Metabolic overload by saturated fatty acids (SFA), which comprises β-cell function, and impaired glucose-stimulated insulin secretion are frequently observed in patients suffering from obesity and type 2 diabetes mellitus. The increase of intracellular Ca2+ triggers insulin granule release, therefore several mechanisms regulate Ca2+ efflux within the β-cells, among others, the plasma membrane Ca2+-ATPase (PMCA). In this work, we describe that lipotoxicity mediated mainly by the saturated palmitic acid (PA) (16C) is associated with loss of protein homeostasis (proteostasis) and potentially cell viability, a phenomenon that was induced to a lesser extent by stearic (18C), myristic (14C) and lauric (12C) acids. PA was localized on endoplasmic reticulum, activating arms of the unfolded protein response (UPR), as also promoted by lipopolysaccharides (LPS)-endotoxins. In particular, our findings demonstrate an alteration in PMCA1/4 expression caused by PA and LPS which trigger the UPR, affecting not only insulin release and contributing to β-cell mass reduction, but also increasing reactive nitrogen species. Nonetheless, stearic acid (SA) did not show these effects. Remarkably, the proteolytic degradation of PMCA1/4 prompted by PA and LPS was avoided by the action of monounsaturated fatty acids such as oleic and palmitoleic acid. Oleic acid recovered cell viability after treatment with PA/LPS and, more interestingly, relieved endoplasmic reticulum (ER) stress. While palmitoleic acid improved the insulin release, this fatty acid seems to have more relevant effects upon the expression of regulatory pumps of intracellular Ca2+. Therefore, chain length and unsaturation of fatty acids are determinant cues in proteostasis of β-cells and, consequently, on the regulation of calcium and insulin secretion.
Collapse
Affiliation(s)
- Paloma Acosta-Montaño
- Departamento de Bioquímica, Facultad de Medicina Mexicali, Universidad Autónoma de Baja California, 21000 Mexicali, Mexico
| | - Eustolia Rodríguez-Velázquez
- Facultad de Odontología, Universidad Autónoma de Baja California, 22390 Tijuana, Mexico
- Tecnológico Nacional de México/I.T. Tijuana, Centro de Graduados e Investigación en Química-Grupo de Biomateriales y Nanomedicina, 22510 Tijuana, Mexico
| | - Esmeralda Ibarra-López
- Departamento de Bioquímica, Facultad de Medicina Mexicali, Universidad Autónoma de Baja California, 21000 Mexicali, Mexico
| | - Héctor Frayde-Gómez
- Departamento de Bioquímica, Facultad de Medicina Mexicali, Universidad Autónoma de Baja California, 21000 Mexicali, Mexico
- Hospital General de Zona No. 30, Instituto Mexicano del Seguro Social, 21100 Mexicali, Mexico
| | - Jaime Mas-Oliva
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, 04510 Ciudad de México, Mexico
| | - Blanca Delgado-Coello
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, 04510 Ciudad de México, Mexico
| | - Ignacio A Rivero
- Tecnológico Nacional de México/I.T. Tijuana, Centro de Graduados e Investigación en Química, 22000 Tijuana, Mexico
| | - Manuel Alatorre-Meda
- Cátedras CONACyT- Tecnológico Nacional de México/I.T. Tijuana. Centro de Graduados e Investigación en Química-Grupo de Biomateriales y Nanomedicina, 22000 Tijuana, Mexico
| | - Jorge Aguilera
- Tecnológico Nacional de México/I.T. Tijuana, Centro de Graduados e Investigación en Química, 22000 Tijuana, Mexico
| | - Lizbeth Guevara-Olaya
- Departamento de Bioquímica, Facultad de Medicina Mexicali, Universidad Autónoma de Baja California, 21000 Mexicali, Mexico
| | - Victor García-González
- Departamento de Bioquímica, Facultad de Medicina Mexicali, Universidad Autónoma de Baja California, 21000 Mexicali, Mexico.
| |
Collapse
|
33
|
Li Z, Zhou M, Cai Z, Liu H, Zhong W, Hao Q, Cheng D, Hu X, Hou J, Xu P, Xue Y, Zhou Y, Xu T. RNA-binding protein DDX1 is responsible for fatty acid-mediated repression of insulin translation. Nucleic Acids Res 2019; 46:12052-12066. [PMID: 30295850 PMCID: PMC6294501 DOI: 10.1093/nar/gky867] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 09/14/2018] [Indexed: 01/13/2023] Open
Abstract
The molecular mechanism in pancreatic β cells underlying hyperlipidemia and insulin insufficiency remains unclear. Here, we find that the fatty acid-induced decrease in insulin levels occurs due to a decrease in insulin translation. Since regulation at the translational level is generally mediated through RNA-binding proteins, using RNA antisense purification coupled with mass spectrometry, we identify a novel insulin mRNA-binding protein, namely, DDX1, that is sensitive to palmitate treatment. Notably, the knockdown or overexpression of DDX1 affects insulin translation, and the knockdown of DDX1 eliminates the palmitate-induced repression of insulin translation. Molecular mechanism studies show that palmitate treatment causes DDX1 phosphorylation at S295 and dissociates DDX1 from insulin mRNA, thereby leading to the suppression of insulin translation. In addition, DDX1 may interact with the translation initiation factors eIF3A and eIF4B to regulate translation. In high-fat diet mice, the inhibition of insulin translation happens at an early prediabetic stage before the elevation of glucose levels. We speculate that the DDX1-mediated repression of insulin translation worsens the situation of insulin resistance and contributes to the elevation of blood glucose levels in obese animals.
Collapse
Affiliation(s)
- Zonghong Li
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China.,Jilin Province Key Laboratory on Chemistry and Biology of Changbai Mountain Natural Drugs, School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Maoge Zhou
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Zhaokui Cai
- Key Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Hongyang Liu
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Wen Zhong
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Qiang Hao
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Dongwan Cheng
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Xihao Hu
- Key Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Junjie Hou
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Pingyong Xu
- Key Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Yuanchao Xue
- Key Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Yifa Zhou
- Jilin Province Key Laboratory on Chemistry and Biology of Changbai Mountain Natural Drugs, School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Tao Xu
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100101, China
| |
Collapse
|
34
|
A novel fluorescent sensing platform for insulin detection based on competitive recognition of cationic pillar[6]arene. Talanta 2019; 197:130-137. [DOI: 10.1016/j.talanta.2019.01.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 12/24/2018] [Accepted: 01/02/2019] [Indexed: 01/07/2023]
|
35
|
Lee J, Pappalardo Z, Chopra DG, Hennings TG, Vaughn I, Lan C, Choe JJ, Ang K, Chen S, Arkin M, McManus MT, German MS, Ku GM. A Genetic Interaction Map of Insulin Production Identifies Mfi as an Inhibitor of Mitochondrial Fission. Endocrinology 2018; 159:3321-3330. [PMID: 30059978 PMCID: PMC6112596 DOI: 10.1210/en.2018-00426] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 07/23/2018] [Indexed: 11/19/2022]
Abstract
Insulin production by the pancreatic β cell is critical for the glucose homeostasis of the whole organism. Although the transcription factors required for insulin production are known, the upstream pathways that control insulin production are less clear. To further elucidate this regulatory network, we created a genetic interaction map of insulin production by performing ∼20,000 pairwise RNA interference knockdowns of insulin promoter regulators. Our map correctly predicted known physical complexes in the electron transport chain and a role for Spry2 in the unfolded protein response. To further validate our map, we used it to predict the function of an unannotated gene encoding a 37-kDa protein with no identifiable domains we have termed mitochondrial fission factor interactor (Mfi). We have shown that Mfi is a binding partner of the mitochondrial fission factor and that Mfi inhibits dynamin-like protein 1 recruitment to mitochondria. Our data provide a resource to understand the regulatory network of insulin promoter activity.
Collapse
Affiliation(s)
- Jessica Lee
- Diabetes Center, University of California, San Francisco, San Francisco, California
| | - Zachary Pappalardo
- Diabetes Center, University of California, San Francisco, San Francisco, California
| | | | - Thomas G Hennings
- Diabetes Center, University of California, San Francisco, San Francisco, California
- Biomedical Sciences Graduate Program, University of California, San Francisco, San Francisco, California
| | - Ian Vaughn
- Diabetes Center, University of California, San Francisco, San Francisco, California
| | - Christopher Lan
- Diabetes Center, University of California, San Francisco, San Francisco, California
| | - Justin J Choe
- Diabetes Center, University of California, San Francisco, San Francisco, California
| | - Kenny Ang
- Small Molecules Discovery Center, University of California, San Francisco, San Francisco, California
| | - Steven Chen
- Small Molecules Discovery Center, University of California, San Francisco, San Francisco, California
| | - Michelle Arkin
- Small Molecules Discovery Center, University of California, San Francisco, San Francisco, California
| | - Michael T McManus
- Diabetes Center, University of California, San Francisco, San Francisco, California
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, California
| | - Michael S German
- Diabetes Center, University of California, San Francisco, San Francisco, California
- Division of Endocrinology and Metabolism, Department of Medicine, University of California San Francisco, San Francisco, California
| | - Gregory M Ku
- Diabetes Center, University of California, San Francisco, San Francisco, California
- Division of Endocrinology and Metabolism, Department of Medicine, University of California San Francisco, San Francisco, California
- Correspondence: Gregory M. Ku, MD, PhD, Diabetes Center, University of California, San Francisco, 513 Parnassus Avenue, HSW 1002A, Box 0534, San Francisco, California 94143. E-mail:
| |
Collapse
|
36
|
Hoard TM, Yang XP, Jetten AM, ZeRuth GT. PIAS-family proteins negatively regulate Glis3 transactivation function through SUMO modification in pancreatic β cells. Heliyon 2018; 4:e00709. [PMID: 30094379 PMCID: PMC6077130 DOI: 10.1016/j.heliyon.2018.e00709] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 02/09/2018] [Accepted: 07/23/2018] [Indexed: 11/28/2022] Open
Abstract
Gli-similar 3 (Glis3) is Krüppel-like transcription factor associated with the transcriptional regulation of insulin. Mutations within the Glis3 locus have been implicated in a number of pathologies including diabetes mellitus and hypothyroidism. Despite its clinical significance, little is known about the proteins and posttranslational modifications that regulate Glis3 transcriptional activity. In this report, we demonstrate that the SUMO-pathway associated proteins, PIASy and Ubc9 are capable of regulating Glis3 transactivation function through a SUMO-dependent mechanism. We present evidence that SUMOylation of Glis3 by PIAS-family proteins occurs at two conserved lysine residues within the Glis3 N-terminus and modification of Glis3 by SUMO dramatically inhibited insulin transcription. Finally, we provide evidence that Glis3 SUMOylation increases under conditions of chronically elevated glucose and correlates with decreased insulin transcription. Collectively, these results indicate that SUMOylation may serve as a mechanism to regulate Glis3 activity in β cells.
Collapse
Affiliation(s)
- Tyler M Hoard
- Department of Biological Sciences, Murray State University, Murray, KY, USA
| | - Xiao Ping Yang
- Cell Biology Group, Immunity, Inflammation, and Disease Laboratory, Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | - Anton M Jetten
- Cell Biology Group, Immunity, Inflammation, and Disease Laboratory, Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | - Gary T ZeRuth
- Department of Biological Sciences, Murray State University, Murray, KY, USA.,Cell Biology Group, Immunity, Inflammation, and Disease Laboratory, Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| |
Collapse
|
37
|
Paschen M, Moede T, Valladolid-Acebes I, Leibiger B, Moruzzi N, Jacob S, García-Prieto CF, Brismar K, Leibiger IB, Berggren PO. Diet-induced β-cell insulin resistance results in reversible loss of functional β-cell mass. FASEB J 2018; 33:204-218. [PMID: 29957055 PMCID: PMC6355083 DOI: 10.1096/fj.201800826r] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Although convincing in genetic models, the relevance of β-cell insulin resistance in diet-induced type 2 diabetes (T2DM) remains unclear. Exemplified by diabetes-prone, male, C57B1/6J mice being fed different combinations of Western-style diet, we show that β-cell insulin resistance occurs early during T2DM progression and is due to a combination of lipotoxicity and increased β-cell workload. Within 8 wk of being fed a high-fat, high-sucrose diet, mice became obese, developed impaired insulin and glucose tolerances, and displayed noncompensatory insulin release, due, at least in part, to reduced expression of syntaxin-1A. Through reporter islets transplanted to the anterior chamber of the eye, we demonstrated a concomitant loss of functional β-cell mass. When mice were changed from diabetogenic diet to normal chow diet, the diabetes phenotype was reversed, suggesting a remarkable plasticity of functional β-cell mass in the early phase of T2DM development. Our data reinforce the relevance of diet composition as an environmental factor determining different routes of diabetes progression in a given genetic background. Employing the in vivo reporter islet–monitoring approach will allow researchers to define key times in the dynamics of reversible loss of functional β-cell mass and, thus, to investigate the underlying, molecular mechanisms involved in the progression toward T2DM manifestation.—Paschen, M., Moede, T., Valladolid-Acebes, I., Leibiger, B., Moruzzi, N., Jacob, S., García-Prieto, C. F., Brismar, K., Leibiger, I. B., Berggren, P.-O. Diet-induced β-cell insulin resistance results in reversible loss of functional β-cell mass.
Collapse
Affiliation(s)
- Meike Paschen
- The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institutet, Stockholm, Sweden
| | - Tilo Moede
- The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institutet, Stockholm, Sweden
| | - Ismael Valladolid-Acebes
- The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institutet, Stockholm, Sweden
| | - Barbara Leibiger
- The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institutet, Stockholm, Sweden
| | - Noah Moruzzi
- The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institutet, Stockholm, Sweden
| | - Stefan Jacob
- The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institutet, Stockholm, Sweden
| | - Concha F García-Prieto
- The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institutet, Stockholm, Sweden
| | - Kerstin Brismar
- The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institutet, Stockholm, Sweden
| | - Ingo B Leibiger
- The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institutet, Stockholm, Sweden
| | - Per-Olof Berggren
- The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institutet, Stockholm, Sweden
| |
Collapse
|
38
|
Junjappa RP, Patil P, Bhattarai KR, Kim HR, Chae HJ. IRE1α Implications in Endoplasmic Reticulum Stress-Mediated Development and Pathogenesis of Autoimmune Diseases. Front Immunol 2018; 9:1289. [PMID: 29928282 PMCID: PMC5997832 DOI: 10.3389/fimmu.2018.01289] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Accepted: 05/22/2018] [Indexed: 12/15/2022] Open
Abstract
Inositol-requiring transmembrane kinase/endoribonuclease 1α (IRE1α) is the most prominent and evolutionarily conserved endoplasmic reticulum (ER) membrane protein. This transduces the signal of misfolded protein accumulation in the ER, named as ER stress, to the nucleus as “unfolded protein response (UPR).” The ER stress-mediated IRE1α signaling pathway arbitrates the yin and yang of cell life. IRE1α has been implicated in several physiological as well as pathological conditions, including immune disorders. Autoimmune diseases are caused by abnormal immune responses that develop due to genetic mutations and several environmental factors, including infections and chemicals. These factors dysregulate the cell immune reactions, such as cytokine secretion, antigen presentation, and autoantigen generation. However, the mechanisms involved, in which these factors induce the onset of autoimmune diseases, are remaining unknown. Considering that these environmental factors also induce the UPR, which is expected to have significant role in secretory cells and immune cells. The role of the major UPR molecule, IRE1α, in causing immune responses is well identified, but its role in inducing autoimmunity and the pathogenesis of autoimmune diseases has not been clearly elucidated. Hence, a better understanding of the role of IRE1α and its regulatory mechanisms in causing autoimmune diseases could help to identify and develop the appropriate therapeutic strategies. In this review, we mainly center the discussion on the molecular mechanisms of IRE1α in the pathophysiology of autoimmune diseases.
Collapse
Affiliation(s)
- Raghu Patil Junjappa
- Department of Pharmacology, School of Medicine, Institute of New Drug Development, Chonbuk National University, Jeonju, South Korea
| | - Prakash Patil
- Department of Pharmacology, School of Medicine, Institute of New Drug Development, Chonbuk National University, Jeonju, South Korea
| | - Kashi Raj Bhattarai
- Department of Pharmacology, School of Medicine, Institute of New Drug Development, Chonbuk National University, Jeonju, South Korea
| | - Hyung-Ryong Kim
- Graduate School, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, South Korea
| | - Han-Jung Chae
- Department of Pharmacology, School of Medicine, Institute of New Drug Development, Chonbuk National University, Jeonju, South Korea
| |
Collapse
|
39
|
Zhang H, Zuo F, Tan X, Xu S, Yuan R, Chen S. A novel electrochemiluminescent biosensor based on resonance energy transfer between poly(9,9-di- n -octylfluorenyl-2,7-diyl) and 3,4,9,10-perylenetetracar-boxylic acid for insulin detection. Biosens Bioelectron 2018; 104:65-71. [DOI: 10.1016/j.bios.2017.12.046] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 12/20/2017] [Accepted: 12/26/2017] [Indexed: 01/08/2023]
|
40
|
Neelankal John A, Jiang FX. An overview of type 2 diabetes and importance of vitamin D3-vitamin D receptor interaction in pancreatic β-cells. J Diabetes Complications 2018; 32:429-443. [PMID: 29422234 DOI: 10.1016/j.jdiacomp.2017.12.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2017] [Revised: 12/03/2017] [Accepted: 12/07/2017] [Indexed: 02/07/2023]
Abstract
One significant health issue that plagues contemporary society is that of Type 2 diabetes (T2D). This disease is characterised by higher-than-average blood glucose levels as a result of a combination of insulin resistance and insufficient insulin secretions from the β-cells of pancreatic islets of Langerhans. Previous developmental research into the pancreas has identified how early precursor genes of pancreatic β-cells, such as Cpal, Ngn3, NeuroD, Ptf1a, and cMyc, play an essential role in the differentiation of these cells. Furthermore, β-cell molecular characterization has also revealed the specific role of β-cell-markers, such as Glut2, MafA, Ins1, Ins2, and Pdx1 in insulin expression. The expression of these genes appears to be suppressed in the T2D β-cells, along with the reappearance of the early endocrine marker genes. Glucose transporters transport glucose into β-cells, thereby controlling insulin release during hyperglycaemia. This stimulates glycolysis through rises in intracellular calcium (a process enhanced by vitamin D) (Norman et al., 1980), activating 2 of 4 proteinases. The rise in calcium activates half of pancreatic β-cell proinsulinases, thus releasing free insulin from granules. The synthesis of ATP from glucose by glycolysis, Krebs cycle and oxidative phosphorylation plays a role in insulin release. Some studies have found that the β-cells contain high levels of the vitamin D receptor; however, the role that this plays in maintaining the maturity of the β-cells remains unknown. Further research is required to develop a more in-depth understanding of the role VDR plays in β-cell function and the processes by which the beta cell function is preserved.
Collapse
Affiliation(s)
- Abraham Neelankal John
- Harry Perkins Institute of Medical Research, Centre for Medical Research, University of Western Australia, Nedlands, Western Australia, Australia; School of Medicine and Pharmacology, University of Western Australia, Carwley, Western Australia, Australia
| | - Fang-Xu Jiang
- Harry Perkins Institute of Medical Research, Centre for Medical Research, University of Western Australia, Nedlands, Western Australia, Australia; School of Medicine and Pharmacology, University of Western Australia, Carwley, Western Australia, Australia.
| |
Collapse
|
41
|
Wong CK, Wade-Vallance AK, Luciani DS, Brindle PK, Lynn FC, Gibson WT. The p300 and CBP Transcriptional Coactivators Are Required for β-Cell and α-Cell Proliferation. Diabetes 2018; 67:412-422. [PMID: 29217654 DOI: 10.2337/db17-0237] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 11/21/2017] [Indexed: 11/13/2022]
Abstract
p300 (EP300) and CBP (CREBBP) are transcriptional coactivators with histone acetyltransferase activity. Various β-cell transcription factors can recruit p300/CBP, and thus the coactivators could be important for β-cell function and health in vivo. We hypothesized that p300/CBP contribute to the development and proper function of pancreatic islets. To test this, we bred and studied mice lacking p300/CBP in their islets. Mice lacking either p300 or CBP in islets developed glucose intolerance attributable to impaired insulin secretion, together with reduced α- and β-cell area and islet insulin content. These phenotypes were exacerbated in mice with only a single copy of p300 or CBP expressed in islets. Removing p300 in pancreatic endocrine progenitors impaired proliferation of neonatal α- and β-cells. Mice lacking all four copies of p300/CBP in pancreatic endocrine progenitors failed to establish α- and β-cell mass postnatally. Transcriptomic analyses revealed significant overlaps between p300/CBP-downregulated genes and genes downregulated in Hnf1α-null islets and Nkx2.2-null islets, among others. Furthermore, p300/CBP are important for the acetylation of H3K27 at loci downregulated in Hnf1α-null islets. We conclude that p300 and CBP are limiting cofactors for islet development, and hence for postnatal glucose homeostasis, with some functional redundancy.
Collapse
Affiliation(s)
- Chi Kin Wong
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
- BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada
| | | | - Dan S Luciani
- BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Francis C Lynn
- BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Cellular & Physiological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - William T Gibson
- Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
- BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada
| |
Collapse
|
42
|
Alshaikh OM, Yoon JY, Chan BA, Krzyzanowska MK, Butany J, Asa SL, Ezzat S. Pancreatic Neuroendocrine Tumor Producing Insulin and Vasopressin. Endocr Pathol 2018; 29:15-20. [PMID: 28718084 DOI: 10.1007/s12022-017-9492-5] [Citation(s) in RCA: 5] [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] [Indexed: 01/27/2023]
Abstract
The objective of the study is to report a rare case of pancreatic neuroendocrine tumor (pNET) producing insulin and vasopressin. We describe the clinical presentation and management of a metastatic pNET with refractory hypoglycemia and progressive severe hyponatremia. A 52-year-old patient had abdominal pain leading to the diagnosis of a tumor that was initially presumed to be splenic in origin. Investigations ultimately identified a pancreatic mass that on biopsy proved to be a pNET. Eventually, he developed extensive liver metastases, and with tumor progression, he manifested hypoglycemia and severe hyponatremia. He was managed with multiple therapies including somatostatin analogue, peptide-receptor-radionuclide-therapy (PRRT), diazoxide, and everolimus; none of these therapeutic modalities was successful in controlling functional and structural progression of the tumor. Ultimately, the pNET proved fatal and autopsy confirmed widely metastatic disease that stained strongly and diffusely for vasopressin, a feature not seen in the previous liver biopsy. This case illustrates the challenges of diagnosis and management of aggressive insulin-producing pNETs and highlights the potential concomitant ectopic production of vasopressin leading to refractory hyponatremia.
Collapse
Affiliation(s)
- Omalkhaire M Alshaikh
- Department of Internal Medicine, Al Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia
- Department of Medicine, Princess Margaret Cancer Centre, University Health Network, 610 University Avenue, Room 7-327, Toronto, ON, M5G 2M9, Canada
| | - Ju-Yoon Yoon
- Department of Pathology, University Health Network, University of Toronto, Toronto, ON, Canada
| | - Bryan A Chan
- Department of Medicine, Princess Margaret Cancer Centre, University Health Network, 610 University Avenue, Room 7-327, Toronto, ON, M5G 2M9, Canada
| | - Monika K Krzyzanowska
- Department of Medicine, Princess Margaret Cancer Centre, University Health Network, 610 University Avenue, Room 7-327, Toronto, ON, M5G 2M9, Canada
| | - Jagdish Butany
- Department of Pathology, University Health Network, University of Toronto, Toronto, ON, Canada
| | - Sylvia L Asa
- Department of Pathology, University Health Network, University of Toronto, Toronto, ON, Canada
| | - Shereen Ezzat
- Department of Medicine, Princess Margaret Cancer Centre, University Health Network, 610 University Avenue, Room 7-327, Toronto, ON, M5G 2M9, Canada.
| |
Collapse
|
43
|
Zinc-doping enhanced cadmium sulfide electrochemiluminescence behavior based on Au-Cu alloy nanocrystals quenching for insulin detection. Biosens Bioelectron 2017; 97:115-121. [DOI: 10.1016/j.bios.2017.05.046] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 05/08/2017] [Accepted: 05/26/2017] [Indexed: 01/29/2023]
|
44
|
Donadel G, Pastore D, Della-Morte D, Capuani B, Lombardo MF, Pacifici F, Bugliani M, Grieco FA, Marchetti P, Lauro D. FGF-2b and h-PL Transform Duct and Non-Endocrine Human Pancreatic Cells into Endocrine Insulin Secreting Cells by Modulating Differentiating Genes. Int J Mol Sci 2017; 18:ijms18112234. [PMID: 29068419 PMCID: PMC5713204 DOI: 10.3390/ijms18112234] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 10/13/2017] [Accepted: 10/16/2017] [Indexed: 12/12/2022] Open
Abstract
Background: Diabetes mellitus (DM) is a multifactorial disease orphan of a cure. Regenerative medicine has been proposed as novel strategy for DM therapy. Human fibroblast growth factor (FGF)-2b controls β-cell clusters via autocrine action, and human placental lactogen (hPL)-A increases functional β-cells. We hypothesized whether FGF-2b/hPL-A treatment induces β-cell differentiation from ductal/non-endocrine precursor(s) by modulating specific genes expression. Methods: Human pancreatic ductal-cells (PANC-1) and non-endocrine pancreatic cells were treated with FGF-2b plus hPL-A at 500 ng/mL. Cytofluorimetry and Immunofluorescence have been performed to detect expression of endocrine, ductal and acinar markers. Bromodeoxyuridine incorporation and annexin-V quantified cells proliferation and apoptosis. Insulin secretion was assessed by RIA kit, and electron microscopy analyzed islet-like clusters. Results: Increase in PANC-1 duct cells de-differentiation into islet-like aggregates was observed after FGF-2b/hPL-A treatment showing ultrastructure typical of islets-aggregates. These clusters, after stimulation with FGF-2b/hPL-A, had significant (p < 0.05) increase in insulin, C-peptide, pancreatic and duodenal homeobox 1 (PDX-1), Nkx2.2, Nkx6.1, somatostatin, glucagon, and glucose transporter 2 (Glut-2), compared with control cells. Markers of PANC-1 (Cytokeratin-19, MUC-1, CA19-9) were decreased (p < 0.05). These aggregates after treatment with FGF-2b/hPL-A significantly reduced levels of apoptosis. Conclusions: FGF-2b and hPL-A are promising candidates for regenerative therapy in DM by inducing de-differentiation of stem cells modulating pivotal endocrine genes.
Collapse
Affiliation(s)
- Giulia Donadel
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy.
| | - Donatella Pastore
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy.
| | - David Della-Morte
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy.
- Department of Human Sciences and Quality of Life Promotion, San Raffaele Roma Open University, 00166 Rome, Italy.
| | - Barbara Capuani
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy.
| | - Marco F Lombardo
- Agenzia regionale per la protezione ambientale (ARPA) Lazio, Sezione di Roma, 00173 Rome, Italy.
| | - Francesca Pacifici
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy.
| | - Marco Bugliani
- Endocrinology and Metabolism of Transplantation, Azienda Ospedaliero-Universitaria (A.O.U.) Pisana, 56126 Pisa, Italy.
| | - Fabio A Grieco
- Department of Medicine, Surgery and Neuroscience, University of Siena, 53100 Siena, Italy.
| | - Piero Marchetti
- Endocrinology and Metabolism of Transplantation, Azienda Ospedaliero-Universitaria (A.O.U.) Pisana, 56126 Pisa, Italy.
| | - Davide Lauro
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy.
| |
Collapse
|
45
|
Li H, Li Y, Xiang L, Zhang J, Zhu B, Xiang L, Dong J, Liu M, Xiang G. GDF11 Attenuates Development of Type 2 Diabetes via Improvement of Islet β-Cell Function and Survival. Diabetes 2017; 66:1914-1927. [PMID: 28450417 DOI: 10.2337/db17-0086] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 04/18/2017] [Indexed: 11/13/2022]
Abstract
Growth differentiation factor 11 (GDF11) has been implicated in the regulation of islet development and a variety of aging conditions, but little is known about the physiological functions of GDF11 in adult pancreatic islets. Here, we showed that systematic replenishment of GDF11 not only preserved insulin secretion but also improved the survival and morphology of β-cells and improved glucose metabolism in both nongenetic and genetic mouse models of type 2 diabetes (T2D). Conversely, anti-GDF11 monoclonal antibody treatment caused β-cell failure and lethal T2D. In vitro treatment of isolated murine islets and MIN6 cells with recombinant GDF11 attenuated glucotoxicity-induced β-cell dysfunction and apoptosis. Mechanistically, the GDF11-mediated protective effects could be attributed to the activation of transforming growth factor-β/Smad2 and phosphatidylinositol-4,5-bisphosphate 3-kinase-AKT-FoxO1 signaling. These findings suggest that GDF11 repletion may improve β-cell function and mass and thus may lead to a new therapeutic approach for T2D.
Collapse
Affiliation(s)
- Huan Li
- Department of Endocrinology, Wuhan General Hospital of Guangzhou Command, Wuhan, Hubei Province, China
| | - Yixiang Li
- Radiation-Diagnostic/Oncology School of Medicine, Emory University, Atlanta, GA
| | - Lingwei Xiang
- Mathematics and Statistics Department, Georgia State University, Atlanta, GA
| | - JiaJia Zhang
- Department of Endocrinology, Wuhan General Hospital of Guangzhou Command, Wuhan, Hubei Province, China
| | - Biao Zhu
- Department of Endocrinology, Wuhan General Hospital of Guangzhou Command, Wuhan, Hubei Province, China
| | - Lin Xiang
- Department of Endocrinology, Wuhan General Hospital of Guangzhou Command, Wuhan, Hubei Province, China
| | - Jing Dong
- Department of Endocrinology, Wuhan General Hospital of Guangzhou Command, Wuhan, Hubei Province, China
| | - Min Liu
- Department of Endocrinology, Wuhan General Hospital of Guangzhou Command, Wuhan, Hubei Province, China
| | - Guangda Xiang
- Department of Endocrinology, Wuhan General Hospital of Guangzhou Command, Wuhan, Hubei Province, China
| |
Collapse
|
46
|
Al-Khawaga S, Memon B, Butler AE, Taheri S, Abou-Samra AB, Abdelalim EM. Pathways governing development of stem cell-derived pancreatic β cells: lessons from embryogenesis. Biol Rev Camb Philos Soc 2017. [DOI: 10.1111/brv.12349] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Sara Al-Khawaga
- Diabetes Research Center, Qatar Biomedical Research Institute; Hamad Bin Khalifa University, Qatar Foundation, Education City; Doha Qatar
| | - Bushra Memon
- Diabetes Research Center, Qatar Biomedical Research Institute; Hamad Bin Khalifa University, Qatar Foundation, Education City; Doha Qatar
| | - Alexandra E. Butler
- Larry L. Hillblom Islet Research Center, David Geffen School of Medicine; University of California; Los Angeles CA 90095 U.S.A
| | - Shahrad Taheri
- Department of Medicine; Weill Cornell Medicine in Qatar, Qatar Foundation, Education City, PO BOX 24144; Doha Qatar
- Department of Medicine; Qatar Metabolic Institute, Hamad Medical Corporation; Doha Qatar
| | - Abdul B. Abou-Samra
- Department of Medicine; Weill Cornell Medicine in Qatar, Qatar Foundation, Education City, PO BOX 24144; Doha Qatar
- Department of Medicine; Qatar Metabolic Institute, Hamad Medical Corporation; Doha Qatar
| | - Essam M. Abdelalim
- Diabetes Research Center, Qatar Biomedical Research Institute; Hamad Bin Khalifa University, Qatar Foundation, Education City; Doha Qatar
| |
Collapse
|
47
|
Shcherbina L, Edlund A, Esguerra JLS, Abels M, Zhou Y, Ottosson-Laakso E, Wollheim CB, Hansson O, Eliasson L, Wierup N. Endogenous beta-cell CART regulates insulin secretion and transcription of beta-cell genes. Mol Cell Endocrinol 2017; 447:52-60. [PMID: 28237718 DOI: 10.1016/j.mce.2017.02.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 02/16/2017] [Accepted: 02/16/2017] [Indexed: 01/20/2023]
Abstract
Impaired beta-cell function is key to the development of type 2 diabetes. Cocaine- and amphetamine-regulated transcript (CART) is an islet peptide with insulinotropic and glucagonostatic properties. Here we studied the role of endogenous CART in beta-cell function. CART silencing in INS-1 (832/13) beta-cells reduced insulin secretion and production, ATP levels and beta-cell exocytosis. This was substantiated by reduced expression of several exocytosis genes, as well as reduced expression of genes important for insulin secretion and processing. In addition, CART silencing reduced the expression of a network of transcription factors essential for beta-cell function. Moreover, in RNAseq data from human islet donors, CARTPT expression levels correlated with insulin, exocytosis genes and key beta-cell transcription factors. Thus, endogenous beta-cell CART regulates insulin expression and secretion in INS-1 (832/13) cells, via actions on the exocytotic machinery and a network of beta-cell transcription factors. We conclude that CART is important for maintaining the beta-cell phenotype.
Collapse
Affiliation(s)
- L Shcherbina
- Lund University Diabetes Centre, Skåne University Hospital, Jan Waldenströms Gata 35, 214 28 Malmö, Sweden
| | - A Edlund
- Lund University Diabetes Centre, Skåne University Hospital, Jan Waldenströms Gata 35, 214 28 Malmö, Sweden
| | - J L S Esguerra
- Lund University Diabetes Centre, Skåne University Hospital, Jan Waldenströms Gata 35, 214 28 Malmö, Sweden
| | - M Abels
- Lund University Diabetes Centre, Skåne University Hospital, Jan Waldenströms Gata 35, 214 28 Malmö, Sweden
| | - Y Zhou
- Lund University Diabetes Centre, Skåne University Hospital, Jan Waldenströms Gata 35, 214 28 Malmö, Sweden
| | - E Ottosson-Laakso
- Lund University Diabetes Centre, Skåne University Hospital, Jan Waldenströms Gata 35, 214 28 Malmö, Sweden
| | - C B Wollheim
- Lund University Diabetes Centre, Skåne University Hospital, Jan Waldenströms Gata 35, 214 28 Malmö, Sweden; Department of Cell Physiology and Metabolism, University Medical Center, 1 Rue Michel-Servet, CH-1211 Genève 4, Switzerland
| | - O Hansson
- Lund University Diabetes Centre, Skåne University Hospital, Jan Waldenströms Gata 35, 214 28 Malmö, Sweden
| | - L Eliasson
- Lund University Diabetes Centre, Skåne University Hospital, Jan Waldenströms Gata 35, 214 28 Malmö, Sweden
| | - N Wierup
- Lund University Diabetes Centre, Skåne University Hospital, Jan Waldenströms Gata 35, 214 28 Malmö, Sweden.
| |
Collapse
|
48
|
Prasad C, Davis KE, Imrhan V, Juma S, Vijayagopal P. Advanced Glycation End Products and Risks for Chronic Diseases: Intervening Through Lifestyle Modification. Am J Lifestyle Med 2017; 13:384-404. [PMID: 31285723 DOI: 10.1177/1559827617708991] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 04/18/2017] [Accepted: 04/19/2017] [Indexed: 12/17/2022] Open
Abstract
Advanced glycation end products (AGEs) are a family of compounds of diverse chemical nature that are the products of nonenzymatic reactions between reducing sugars and proteins, lipids, or nucleic acids. AGEs bind to one or more of their multiple receptors (RAGE) found on a variety of cell types and elicit an array of biologic responses. In this review, we have summarized the data on the nature of AGEs and issues associated with their measurements, their receptors, and changes in their expression under different physiologic and disease states. Last, we have used this information to prescribe lifestyle choices to modulate AGE-RAGE cycle for better health.
Collapse
Affiliation(s)
- Chandan Prasad
- Department of Nutrition and Food Sciences, Texas Woman's University, Denton, Texas (CP, VI, SJ, PV).,Department of Clinical Nutrition, University of Texas Southwestern Medical Center, Dallas, Texas (KED)
| | - Kathleen E Davis
- Department of Nutrition and Food Sciences, Texas Woman's University, Denton, Texas (CP, VI, SJ, PV).,Department of Clinical Nutrition, University of Texas Southwestern Medical Center, Dallas, Texas (KED)
| | - Victorine Imrhan
- Department of Nutrition and Food Sciences, Texas Woman's University, Denton, Texas (CP, VI, SJ, PV).,Department of Clinical Nutrition, University of Texas Southwestern Medical Center, Dallas, Texas (KED)
| | - Shanil Juma
- Department of Nutrition and Food Sciences, Texas Woman's University, Denton, Texas (CP, VI, SJ, PV).,Department of Clinical Nutrition, University of Texas Southwestern Medical Center, Dallas, Texas (KED)
| | - Parakat Vijayagopal
- Department of Nutrition and Food Sciences, Texas Woman's University, Denton, Texas (CP, VI, SJ, PV).,Department of Clinical Nutrition, University of Texas Southwestern Medical Center, Dallas, Texas (KED)
| |
Collapse
|
49
|
Wang R, Ma H, Zhang Y, Wang Q, Yang Z, Du B, Wu D, Wei Q. Photoelectrochemical sensitive detection of insulin based on CdS/polydopamine co-sensitized WO 3 nanorod and signal amplification of carbon nanotubes@polydopamine. Biosens Bioelectron 2017; 96:345-350. [PMID: 28525853 DOI: 10.1016/j.bios.2017.05.029] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 05/11/2017] [Accepted: 05/12/2017] [Indexed: 10/19/2022]
Abstract
An ultrasensitive photoelectrochemical sandwich immunosensor was designed for detection of insulin based on WO3/CdS/polydopamine (WO3/CdS/PDA) co-sensitized and PDA@carbon nanotubes (PDA@CNT) conjugates for signal amplification. The CdS nanoparticles were first deposited on the WO3 nanorods via sequential chemical bath deposition to form the WO3/CdS structure to enhance photocurrent. Then equipped with PDA to form the WO3/CdS/PDA photosensitive structure. The PDA was used not only to reduce the toxicity of CdS but also adsorb insulin primary antibodies (Ab1). Meanwhile, insulin secondary antibodies (Ab2) were decorated by PDA@CNT conjugates for signal amplification and further enhance photocurrent. Different photocurrent intensities were obtained by the photoelectrochemical workstation at applied bias of 0V due to the different amount of the PDA@CNT conjugates introduced by the different concentrations of insulin. A good linear relationship was obtained between the increased photocurrent and insulin concentrations range from 0.01ngmL-1 to 50ngmL-1. And a detection limit of 2.8pgmL-1 was obtained. The proposed sensor was applied to the determination of the insulin in human serum sample, and satisfactory results were obtained. The sensor presented good specificity, reproducibility and stability, thus it might find application in the clinical diagnosis of insulin or other biomarkers in the near future.
Collapse
Affiliation(s)
- Rongyu Wang
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, University of Jinan, Jinan 250022, PR China
| | - Hongmin Ma
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, University of Jinan, Jinan 250022, PR China
| | - Yong Zhang
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, University of Jinan, Jinan 250022, PR China.
| | - Qi Wang
- School of Material Science and Engineering, University of Jinan, Jinan 250022, PR China
| | - Zhongping Yang
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, University of Jinan, Jinan 250022, PR China
| | - Bin Du
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, University of Jinan, Jinan 250022, PR China
| | - Dan Wu
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, University of Jinan, Jinan 250022, PR China
| | - Qin Wei
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, University of Jinan, Jinan 250022, PR China
| |
Collapse
|
50
|
Wang Y, Lin D, Wang X, Zhu W, Ye J, Li G, Ma Z, Deng X. The impact of a novel peach gum-derived polysaccharide on postprandial blood glucose control in streptozotocin-induced diabetic mice. Int J Biol Macromol 2017; 98:379-386. [DOI: 10.1016/j.ijbiomac.2017.01.085] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 12/16/2016] [Accepted: 01/17/2017] [Indexed: 01/21/2023]
|