1
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Khalil SG, Younis NN, Shaheen MA, Hammad SK, Elswefy SE. Evaluation of in vivo and ex vivo pre-treated bone marrow-derived mesenchymal stem cells with resveratrol in streptozotocin-induced type 1 diabetic rats. J Pharm Pharmacol 2023; 75:1186-1197. [PMID: 37177978 DOI: 10.1093/jpp/rgad042] [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: 12/18/2022] [Accepted: 04/25/2023] [Indexed: 05/15/2023]
Abstract
OBJECTIVES To compare the therapeutic potential of rat bone marrow-derived mesenchymal stem cells (BM-MSCs) preconditioned ex-vivo with resveratrol (MCR) and BM-MSCs isolated from resveratrol-pre-treated rats (MTR) in type-1 diabetic rats. METHODS Type-1 diabetes was induced by a single streptozotocin injection (50 mg/kg; ip) in 24 rats. Following the confirmation of T1DM, diabetic rats were randomly divided into four groups: diabetic control (DC), diabetic rats treated with insulin subcutaneous (7.5 IU/kg/day), diabetic rats treated with MCR cells (3 × 106cells/rat, intravenous) and diabetic rats treated with MTR cells (3 × 106cells/rat, intravenous). Rats were sacrificed 4 weeks following cellular transplantation. KEY FINDINGS Untreated diabetic rats suffered from pancreatic cell damage, had high blood glucose levels, increased apoptotic, fibrosis, and oxidative stress markers and decreased survival and pancreatic regeneration parameters. Both MSCs preconditioned ex-vivo with RES and MSCs isolated from rats pre-treated with RES homed successfully in injured pancreas and showed therapeutic potential in the treatment of STZ-induced T1DM. MCR cells showed better efficiency than MTR cells. CONCLUSIONS The pre-conditioning of BM-MSCs with resveratrol may be a promising therapeutic possibility in T1DM. Resveratrol-preconditioned BM-MSCs encouraged effects almost comparable to that of exogenous insulin with the advantages of cured pancreas and restored islets not attained by insulin.
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Affiliation(s)
- S G Khalil
- Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - N N Younis
- Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - M A Shaheen
- Department of Histology and Cell Biology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - S K Hammad
- Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - S E Elswefy
- Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
- Department of Biochemistry, Faculty of Pharmacy, Delta University for Science and Technology, Gamasa, Egypt
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2
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Raj A, Shuklan P, Madan P, Chauhan K, Phogat J, Rani S. Comparative Attenuating Impact of Camel Milk and Insulin in Streptozotocin-Induced Diabetic Albino Rats. ACS OMEGA 2023; 8:29270-29280. [PMID: 37599985 PMCID: PMC10433336 DOI: 10.1021/acsomega.3c02626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 07/19/2023] [Indexed: 08/22/2023]
Abstract
In this study, albino Wistar rats that have developed diabetes as a result of the drug streptozotocin (STZ) were treated with camel milk and insulin. For this, 36 rats were divided into six different (n = 6) groups: control, control + camel milk, diabetic control, insulin, camel milk, and combined camel milk + insulin. A 50 mg/kg intraperitoneal injection of STZ was used to induce diabetes. Rats with blood glucose levels exceeding 250 mg/dL after the induction of diabetes were taken into consideration for the study. The diabetic rats were treated with camel milk (50 mL/rat/day), insulin (6 units kg-1 b·wt/day), or their combination daily for 30 days. Throughout the course of the study, the rats' glucose levels and body weight were checked. In the diabetic control rats, a reduction in body weight and hyperglycemic condition was seen. Improvements in glycemic levels and weight gain were seen in the camel milk, insulin, and combined treatment groups compared to the diabetic control group; however, the combined treated group did not show the same degree of improvement as the alone treated group. Hematological changes in the diabetic control group included reductions in lymphocytes, platelets, total leukocyte count (TLC), and red blood cell (RBC) indices (mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), packed cell volume (PCV), and mean cell hemoglobin concentration (MCHC)). Each group that got insulin and camel milk separately and combined showed improvement in these changes. The liver, kidney, and pancreas in the diabetic control group had worsened morphological alterations. These histopathological alternations were significantly improved in the treatment groups. Hence, this study demonstrates the antidiabetic effects of camel milk in comparison to insulin. These findings highlight the potential of camel milk as an alternative therapy for diabetes, although further research is warranted to fully understand its mechanisms of action and long-term effects.
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Affiliation(s)
- Anshu Raj
- Department
of Zoology, Maharshi Dayanand University, Rohtak 124001, Haryana, India
| | - Priyanka Shuklan
- Department
of Zoology, Maharshi Dayanand University, Rohtak 124001, Haryana, India
| | - Preety Madan
- Department
of Zoology, Maharshi Dayanand University, Rohtak 124001, Haryana, India
| | - Khushboo Chauhan
- Department
of Zoology, Maharshi Dayanand University, Rohtak 124001, Haryana, India
| | - Jatin Phogat
- Department
of Biochemistry, Maharshi Dayanand University, Rohtak 124001, Haryana, India
| | - Sudesh Rani
- Department
of Zoology, Maharshi Dayanand University, Rohtak 124001, Haryana, India
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3
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Guo P, Zhang T, Lu A, Shiota C, Huard M, Whitney KE, Huard J. Specific reprogramming of alpha cells to insulin-producing cells by short glucagon promoter-driven Pdx1 and MafA. Mol Ther Methods Clin Dev 2023; 28:355-365. [PMID: 36879848 PMCID: PMC9984919 DOI: 10.1016/j.omtm.2023.02.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 02/07/2023] [Indexed: 02/12/2023]
Abstract
Endogenous reprogramming of pancreas-derived non-beta cells into insulin-producing cells is a promising approach to treat type 1 diabetes (T1D). One strategy that has yet to be explored is the specific delivery of insulin-producing essential genes, Pdx1 and MafA, to pancreatic alpha cells to reprogram the cells into insulin-producing cells in an adult pancreas. In this study, we used an alpha cell-specific glucagon (GCG) promoter to drive Pdx1 and MafA transcription factors to reprogram alpha cells to insulin-producing cells in chemically induced and autoimmune diabetic mice. Our results showed that a combination of a short glucagon-specific promoter with AAV serotype 8 (AAV8) can be used to successfully deliver Pdx1 and MafA to pancreatic alpha cells in the mouse pancreas. Pdx1 and MafA expression specifically in alpha cells were also able to correct hyperglycemia in both induced and autoimmune diabetic mice. With this technology, targeted gene specificity and reprogramming were accomplished with an alpha-specific promotor combined with an AAV-specific serotype and provide an initial basis to develop a novel therapy for the treatment of T1D.
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Affiliation(s)
- Ping Guo
- Center for Regenerative & Personalized Medicine, Steadman Philippon Research Institute, Vail, CO 81657, USA.,Department of Clinical Sciences, Colorado State University, Fort Collins, CO 80526, USA
| | - Ting Zhang
- Division of Pediatric Surgery, Department of Surgery, Children's Hospital of Pittsburgh, University of Pittsburgh School of Medicine, 4401 Penn Avenue, Pittsburgh, PA 15224, USA
| | - Aiping Lu
- Center for Regenerative & Personalized Medicine, Steadman Philippon Research Institute, Vail, CO 81657, USA.,Department of Clinical Sciences, Colorado State University, Fort Collins, CO 80526, USA
| | - Chiyo Shiota
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Matthieu Huard
- Center for Regenerative & Personalized Medicine, Steadman Philippon Research Institute, Vail, CO 81657, USA.,Department of Clinical Sciences, Colorado State University, Fort Collins, CO 80526, USA
| | - Kaitlyn E Whitney
- Center for Regenerative & Personalized Medicine, Steadman Philippon Research Institute, Vail, CO 81657, USA
| | - Johnny Huard
- Center for Regenerative & Personalized Medicine, Steadman Philippon Research Institute, Vail, CO 81657, USA.,Department of Clinical Sciences, Colorado State University, Fort Collins, CO 80526, USA
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4
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Understanding the Combined Effects of High Glucose Induced Hyper-Osmotic Stress and Oxygen Tension in the Progression of Tumourigenesis: From Mechanism to Anti-Cancer Therapeutics. Cells 2023; 12:cells12060825. [PMID: 36980166 PMCID: PMC10047272 DOI: 10.3390/cells12060825] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/03/2023] [Accepted: 02/17/2023] [Indexed: 03/09/2023] Open
Abstract
High glucose (HG), a hallmark of the tumour microenvironment, is also a biomechanical stressor, as it exerts hyper-osmotic stress (HG-HO), but not much is known regarding how tumour cells mechanoadapt to HG-HO. Therefore, this study aimed to delineate the novel molecular mechanisms by which tumour cells mechanoadapt to HG/HG-HO and whether phytochemical-based interference in these mechanisms can generate tumour-cell-selective vulnerability to cell death. Mannitol and L-glucose were used as hyper-osmotic equivalents of high glucose. The results revealed that the tumour cells can efficiently mechanoadapt to HG-HO only in the normoxic microenvironment. Under normoxic HG/HG-HO stress, tumour cells polySUMOylate a higher pool of mitotic driver pH3(Ser10), which translocates to the nucleus and promotes faster cell divisions. On the contrary, acute hypoxia dampens HG/HG-HO-associated excessive proliferation by upregulating sentrin protease SENP7. SENP7 promotes abnormal SUMOylation of pH3(Ser10), thereby restricting its nuclear entry and promoting the M-phase arrest and cell loss. However, the hypoxia-arrested cells that managed to survive showed relapse upon reversal to normoxia as well as upregulation of pro-survival-associated SENP1, and players in tumour growth signalling, autophagy, glycolytic pathways etc. Depletion of SENP1 in both normoxia and hypoxia caused significant loss of tumour cells vs undepleted controls. SENP1 was ascertained to restrict the abnormal SUMOylation of pH3(Ser10) in both normoxia and hypoxia, although not so efficiently in hypoxia, due to the opposing activity of SENP7. Co-treatment with Momordin Ic (MC), a natural SENP1 inhibitor, and Gallic Acid (GA), an inhibitor of identified major pro-tumourigenic signalling (both enriched in Momordica charantia), eliminated surviving tumour cells in normal glucose, HG and HG-HO normoxic and hypoxic microenvironments, suggesting that appropriate and enhanced polySUMOylation of pH3(Ser10) in response to HG/HG-HO stress was attenuated by this treatment along with further dampening of other key tumourigenic signalling, due to which tumour cells could no longer proliferate and grow.
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5
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Siddiqui NZ, Rehman AU, Yousuf W, khan AI, Farooqui NA, Zang S, Xin Y, Wang L. Effect of crude polysaccharide from seaweed, Dictyopteris divaricata (CDDP) on gut microbiota restoration and anti-diabetic activity in streptozotocin (STZ)-induced T1DM mice. Gut Pathog 2022; 14:39. [PMID: 36115959 PMCID: PMC9482207 DOI: 10.1186/s13099-022-00512-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 09/01/2022] [Indexed: 11/10/2022] Open
Abstract
Type-1 Diabetes Mellitus (T1DM) is regarded as a multifunctional, immune-related disease which causes massive destruction of islet β-cells in pancreas resulting in hyperglycemic, hypoinsulinemia and hyperlipidimic conditions. The aim of the present study, was to investigate the hypothesis that streptozotocin (STZ)-induced T1DM in Balb/c mice when treated with crude polysaccharide from seaweed, Dictyopteris divaricata (CDDP) depicts improvement in diabetes-related symptoms. Treatment with CDDP resulted in decreased body weight loss, improved food consumption and water intake disbalances. The CDDP effectively improved fasting blood glucose, oral glucose tolerance (OGTT), serum insulin, insulin secretion, rejuvenation of β-cells mass, serum lipid profile and pro-inflammatory cytokines levels. Additionally, treatment with CDDP increased the population of beneficial bacteria such as Firmicutes, Bacteroidetes and Lactobacillus at phylum, family and genus levels by 16S rRNA sequencing. Furthermore, immunohistological examination confirmed that CDDP reduces the inflammation and restored the structural morphology of colon and upraised the levels of insulin receptor substrate-1 (IRS-1), Mucin-2 (MUC-2) and tight-junction proteins (TJs) whereby maintaining the gut structures and barrier permeability. Thus, the above presented data, highlights the safe and therapeutic effects of crude polysaccharide (CDDP) from D. divaricata in the treatment and restoration of T1DM disorders and can be used as a food supplement alternative to diabetes medicine.
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6
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Arabloei Sani M, Yaghmaei P, Hajebrahimi Z, Hayati Roodbari N. Therapeutic Effect of P-Cymene on Lipid Profile, Liver Enzyme, and Akt/Mtor Pathway in Streptozotocin-Induced Diabetes Mellitus in Wistar Rats. J Obes 2022; 2022:1015669. [PMID: 35528246 PMCID: PMC9072059 DOI: 10.1155/2022/1015669] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 09/28/2021] [Accepted: 04/12/2022] [Indexed: 11/17/2022] Open
Abstract
Diabetes is a serious public health problem in low- and middle-income countries. There is a strong link between hyperglycemia, oxidative stress, inflammation, and the development of diabetes mellitus. PI3K/Akt/mTOR is the main signaling pathway of insulin for controlling lipid and glucose metabolism. P-cymene is an aromatic monoterpene with a widespread range of therapeutic properties including antioxidant and anti-inflammatory activity. In the present study, the antidiabetic effects of p-cymene were investigated. Diabetes was induced using streptozotocin in male Wistar rats. The effects of p-cymene and metformin were studied on levels of glucose (Glu), lipid profile, liver enzymes, oxidative stress, and the expression of Akt, phospho-Akt, and mTOR (mammalian target of rapamycin) proteins, using biochemical, histological, and immunohistochemical analysis. Data have shown that p-cymene can improve serum levels of Glu, total cholesterol (TC), triglycerides (TG), high-density lipoprotein cholesterol (HDL-c), low-density lipoprotein (LDL), very-low-density lipoprotein (VLDL), alkaline phosphatase (ALP), alanine aminotransferase (ALT), aspartate aminotransferase (AST), malondialdehyde (MDA), and the expression of mTOR, Akt, and phospho-Akt protein in diabetic animals. These results suggest that p-cymene has hypoglycemia, hypolipidemia, and antioxidant properties. It can regulate Akt/mTOR pathway and reduce hepatic and pancreas injury. It can be suggested for diabetes management alone or simultaneously with metformin.
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Affiliation(s)
- Maryam Arabloei Sani
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Parichehreh Yaghmaei
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Zahra Hajebrahimi
- A & S Research Institute, Ministry of Science Research and Technology, Tehran, Iran
| | - Nasim Hayati Roodbari
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
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7
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Ding Z, Cheng R, Yang Y, Zhao Y, Ge W, Sun X, Xu X, Wang S, Zhang J. The succinoglycan riclin restores beta cell function through the regulation of macrophages on Th1 and Th2 differentiation in type 1 diabetic mice. Food Funct 2021; 12:11611-11624. [PMID: 34714317 DOI: 10.1039/d1fo02315b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Bacterial succinoglycan is found suitable as a viscosifying and emulsifying agent in the food industry. Riclin is a de-succinyl succinoglycan from an Agrobacterium isolate. Our previous study has revealed that riclin exerts special anti-inflammatory effects in vitro and in vivo. This study aims to determine the effects of riclin on preventing against immunological injury of beta cells in a type 1 diabetic model. We found that orally riclin effectively restores beta-cell function and improves the complications of streptozotocin (STZ)-induced diabetes. Riclin also reduces STZ-induced liver and kidney damage, and balances the inappropriate ratio of T helper type 1 cell (Th1)/type 2 cell (Th2) in the spleen and pancreatic draining lymph nodes of the STZ-induced diabetic mice. In a co-culture system with the islet β cell MIN6 and macrophage RAW 264.7, riclin reduces the levels of IFN-γ and IL-1β, protecting against STZ-caused MIN6 cell injury. We identified that riclin specifically binds to the membrane of macrophages and regulates the ratio of IL-10 and IL-12, thereby inhibiting the macrophage-mediated polarization of Th1 cells and promoting the differentiation of Th2 cells, which depends on the dendritic cell-specific intercellular adhesion molecule-3-grabbing non-integrin (DC-SIGN) receptor. Moreover, orally riclin significantly decreases the incidence of STZ-induced hyperglycemia (7.1% in riclin vs. 92.9% in STZ), and prevents autoimmune diabetes in non-obese diabetic (NOD) mice, with 87.5% of mice free of diabetes compared to 46.6% of the control mice. These results suggest that riclin has potential to be a functional food to prevent and improve autoimmune diabetes and related diseases.
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Affiliation(s)
- Zhao Ding
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China.
| | - Rui Cheng
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China.
| | - Yunxia Yang
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China.
| | - Yang Zhao
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China.
| | - Wenhao Ge
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China.
| | - Xiaqing Sun
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China.
| | - Xi Xu
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China.
| | - Shiming Wang
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China.
| | - Jianfa Zhang
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China.
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8
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Shi Z, Li Y, Jaberi-Douraki M. Hybrid computational modeling demonstrates the utility of simulating complex cellular networks in type 1 diabetes. PLoS Comput Biol 2021; 17:e1009413. [PMID: 34570760 PMCID: PMC8496846 DOI: 10.1371/journal.pcbi.1009413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 10/07/2021] [Accepted: 09/01/2021] [Indexed: 11/29/2022] Open
Abstract
Persistent destruction of pancreatic β-cells in type 1 diabetes (T1D) results from multifaceted pancreatic cellular interactions in various phase progressions. Owing to the inherent heterogeneity of coupled nonlinear systems, computational modeling based on T1D etiology help achieve a systematic understanding of biological processes and T1D health outcomes. The main challenge is to design such a reliable framework to analyze the highly orchestrated biology of T1D based on the knowledge of cellular networks and biological parameters. We constructed a novel hybrid in-silico computational model to unravel T1D onset, progression, and prevention in a non-obese-diabetic mouse model. The computational approach that integrates mathematical modeling, agent-based modeling, and advanced statistical methods allows for modeling key biological parameters and time-dependent spatial networks of cell behaviors. By integrating interactions between multiple cell types, model results captured the individual-specific dynamics of T1D progression and were validated against experimental data for the number of infiltrating CD8+T-cells. Our simulation results uncovered the correlation between five auto-destructive mechanisms identifying a combination of potential therapeutic strategies: the average lifespan of cytotoxic CD8+T-cells in islets; the initial number of apoptotic β-cells; recruitment rate of dendritic-cells (DCs); binding sites on DCs for naïve CD8+T-cells; and time required for DCs movement. Results from therapy-directed simulations further suggest the efficacy of proposed therapeutic strategies depends upon the type and time of administering therapy interventions and the administered amount of therapeutic dose. Our findings show modeling immunogenicity that underlies autoimmune T1D and identifying autoantigens that serve as potential biomarkers are two pressing parameters to predict disease onset and progression.
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Affiliation(s)
- Zhenzhen Shi
- 1DATA Consortium, Kansas State University Olathe, Olathe, Kansas, United States of America
- Department of Mathematics, Kansas State University, Manhattan, Kansas, United States of America
| | - Yang Li
- Laboratory of Immunology and Nanomedicine, Shenzhen Institute of Advanced Technology (SIAT), Chinese Academy of Science, Shenzhen, China
| | - Majid Jaberi-Douraki
- 1DATA Consortium, Kansas State University Olathe, Olathe, Kansas, United States of America
- Department of Mathematics, Kansas State University, Manhattan, Kansas, United States of America
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9
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Boldison J, Thayer TC, Davies J, Wong FS. Natural Protection From Type 1 Diabetes in NOD Mice Is Characterized by a Unique Pancreatic Islet Phenotype. Diabetes 2021; 70:955-965. [PMID: 33531355 DOI: 10.2337/db20-0945] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 01/25/2021] [Indexed: 11/13/2022]
Abstract
The NOD mouse develops spontaneous type 1 diabetes, with some features of disease that are very similar to the human disease. However, a proportion of NOD mice are naturally protected from developing diabetes, and currently, studies characterizing this cohort are very limited. Here, using both immunofluorescence and multiparameter flow cytometry, we focus on the pancreatic islet morphology and immune infiltrate observed in naturally protected NOD mice. We show that naturally protected NOD mice are characterized by an increased frequency of insulin-containing, smaller-sized, pancreatic islets. Although mice remain diabetes free, florid immune infiltrate remains. However, this immune infiltrate is skewed toward a regulatory phenotype in both T- and B-cell compartments. Pancreatic islets have an increased frequency of IL-10-producing B cells and associated cell surface markers. Resident memory CD69+CD8+ T cells show a significant shift toward reduced CD103 expression, while CD4+ T cells have increased FoxP3+CTLA4+ expression. These data indicate that naturally protected NOD mice have a unique islet signature and provide new insight into regulatory mechanisms within pancreatic islets.
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Affiliation(s)
- Joanne Boldison
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff, U.K.
| | - Terri C Thayer
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff, U.K
| | - Joanne Davies
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff, U.K
| | - F Susan Wong
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff, U.K
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10
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Priyadarsini S, Whelchel A, Nicholas S, Sharif R, Riaz K, Karamichos D. Diabetic keratopathy: Insights and challenges. Surv Ophthalmol 2020; 65:513-529. [PMID: 32092364 PMCID: PMC8116932 DOI: 10.1016/j.survophthal.2020.02.005] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 02/10/2020] [Accepted: 02/11/2020] [Indexed: 12/11/2022]
Abstract
Ocular complications from diabetes mellitus are common. Diabetic keratopathy, the most frequent clinical condition affecting the human cornea, is a potentially sight-threatening condition caused mostly by epithelial disturbances that are of clinical and research attention because of their severity. Diabetic keratopathy exhibits several clinical manifestations, including persistent corneal epithelial erosion, superficial punctate keratopathy, delayed epithelial regeneration, and decreased corneal sensitivity, that may lead to compromised visual acuity or permanent vision loss. The limited amount of clinical studies makes it difficult to fully understand the pathobiology of diabetic keratopathy. Effective therapeutic approaches are elusive. We summarize the clinical manifestations of diabetic keratopathy and discuss available treatments and up-to-date research studies in an attempt to provide a thorough overview of the disorder.
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Affiliation(s)
- S Priyadarsini
- Department of Ophthalmology, Dean McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - A Whelchel
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - S Nicholas
- Department of Ophthalmology, Dean McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - R Sharif
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - K Riaz
- Department of Ophthalmology, Dean McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - D Karamichos
- Department of Ophthalmology, Dean McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA; Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA.
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11
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SAYED N, ABDALLA O, KILANY O, DESSOUKI A, YOSHIDA T, SASAKI K, SHIMODA M. Effect of dapagliflozin alone and in combination with insulin in a rat model of type 1 diabetes. J Vet Med Sci 2020; 82:467-474. [PMID: 32161237 PMCID: PMC7192721 DOI: 10.1292/jvms.19-0450] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 02/12/2020] [Indexed: 11/22/2022] Open
Abstract
Dapagliflozin is a selective sodium-glucose cotransporter 2 (SGLT2) inhibitor; it reduces glucose reabsorption via the kidney and increases the glucose excretion in urine. This inhibitor functions through a unique insulin-independent mechanism, and is therefore a potential new approach for the treatment of hyperglycemia in patients with diabetes. In this study, we evaluated the effectiveness of the SGLT2 inhibitor, dapagliflozin, by using a rat model of type 1 diabetes. Type 1 diabetes was induced by a single intraperitoneal injection of 60 mg/kg streptozotocin (STZ). The STZ-induced rats showed marked hyperglycemia and other metabolic abnormalities. We clarified the hypoglycemic effect of the combination treatment of dapagliflozin with a low dose of insulin compared with dapagliflozin alone and insulin alone in 3-week and 8-week studies. Our results showed that dapagliflozin in combination with a low dose of insulin significantly lowered hyperglycemia, hypercholesterolemia, and hypertriglyceridemia. Furthermore, the antioxidant status and body weight were improved. In contrast, treatment with dapagliflozin alone did not improve the blood glucose levels, lipid profile, antioxidant status, or body weight. These findings suggested that in type 1 diabetes, dapagliflozin was effective in combination with a low dose of insulin; however, the administration of dapagliflozin alone did not achieve a significant effect.
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Affiliation(s)
- Noha SAYED
- Laboratory of Veterinary Pharmacology, Department of
Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Tokyo
183-8509, Japan
- Clinical Pathology Department, Faculty of Veterinary
Medicine, Suez Canal University, Ismailia 41522, Egypt
| | - Osama ABDALLA
- Clinical Pathology Department, Faculty of Veterinary
Medicine, Suez Canal University, Ismailia 41522, Egypt
| | - Omnia KILANY
- Clinical Pathology Department, Faculty of Veterinary
Medicine, Suez Canal University, Ismailia 41522, Egypt
| | - Amina DESSOUKI
- Pathology Department, Faculty of Veterinary Medicine, Suez
Canal University, Ismailia 41522, Egypt
| | - Toshinori YOSHIDA
- Laboratory of Veterinary Pathology, Department of Veterinary
Medicine, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509,
Japan
| | - Kazuaki SASAKI
- Laboratory of Veterinary Pharmacology, Department of
Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Tokyo
183-8509, Japan
| | - Minoru SHIMODA
- Laboratory of Veterinary Pharmacology, Department of
Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Tokyo
183-8509, Japan
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12
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Park S, Lee G, Lee H, Hoang T, Chae H. Glucose-lowering effect of Gryllus bimaculatus powder on streptozotocin-induced diabetes through the AKT/mTOR pathway. Food Sci Nutr 2020; 8:402-409. [PMID: 31993166 PMCID: PMC6977414 DOI: 10.1002/fsn3.1323] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 05/26/2019] [Accepted: 06/13/2019] [Indexed: 12/19/2022] Open
Abstract
This study was carried out to elucidate the antidiabetic effects of Gryllus bimaculatus powder using a streptozotocin (STZ)-induced rat model of type I diabetes. Administration of the insect powder significantly rescued representative diabetes markers (i.e., insulin and C-peptide) in STZ-treated rats. Improved glucose tolerance test (GTT) and insulin tolerance test (ITT) results were also observed, indicating that Gryllus bimaculatus powder exerts antidiabetic effects. Gryllus bimaculatus powder administration rescued STZ-induced alterations in both islet morphology and insulin staining patterns. The extract increased antiapoptotic Bcl2 expression and decreased proapoptotic Bax and active caspase 3 expressions. In addition, the Gryllus bimaculatus powder supplementation enhanced AKT/mTOR pathway, a key marker of the state of anabolic metabolism, and its downstream effector, mTOR. Collectively, our results suggest that Gryllus bimaculatus contributes to the maintenance of pancreatic β-cell function and morphology against a diabetic state through the regulations against apoptosis and anabolic metabolism.
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Affiliation(s)
- Seon‐Ah Park
- Non‐Clinical Evaluation CenterBiomedical Research InstituteChonbuk National University HospitalJeonjuChonbukSouth Korea
| | - Geum‐Hwa Lee
- Non‐Clinical Evaluation CenterBiomedical Research InstituteChonbuk National University HospitalJeonjuChonbukSouth Korea
| | - Hwa‐Young Lee
- Non‐Clinical Evaluation CenterBiomedical Research InstituteChonbuk National University HospitalJeonjuChonbukSouth Korea
- Department of Pharmacology and Institute of New Drug DevelopmentSchool of MedicineChonbuk National UniversityJeonjuChonbukSouth Korea
| | - The‐Hiep Hoang
- Non‐Clinical Evaluation CenterBiomedical Research InstituteChonbuk National University HospitalJeonjuChonbukSouth Korea
- Department of Pharmacology and Institute of New Drug DevelopmentSchool of MedicineChonbuk National UniversityJeonjuChonbukSouth Korea
| | - Han‐Jung Chae
- Non‐Clinical Evaluation CenterBiomedical Research InstituteChonbuk National University HospitalJeonjuChonbukSouth Korea
- Department of Pharmacology and Institute of New Drug DevelopmentSchool of MedicineChonbuk National UniversityJeonjuChonbukSouth Korea
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Lin CH, Hsiao LW, Kuo YH, Shih CC. Antidiabetic and Antihyperlipidemic Effects of Sulphurenic Acid, a Triterpenoid Compound from Antrodia camphorata, in Streptozotocin-Induced Diabetic Mice. Int J Mol Sci 2019; 20:E4897. [PMID: 31581697 PMCID: PMC6801777 DOI: 10.3390/ijms20194897] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 09/25/2019] [Accepted: 09/30/2019] [Indexed: 01/19/2023] Open
Abstract
The present study was designed to evaluate the protective effect of sulphurenic acid (SA), a pure compound from Antrodia camphorata, on diabetes and hyperlipidemia in an animal model study and to clarify the underlying molecular mechanism. Diabetes was induced by daily 55 mg/kg intraperitoneal injections of streptozotocin (STZ) solution over five days. Diabetic mice were randomly divided into six groups and orally gavaged with SA (at three dosages) or glibenclamide (Glib), fenofibrate (Feno) or vehicle for 3 weeks. Our findings showed that STZ-induced diabetic mice had significantly increased fasting blood glucose, glycated hemoglobin (HbA1C), plasma triglyceride (TG), and total cholesterol (TC) levels (p < 0.001, p < 0.001, p < 0.001, and p < 0.05, respectively) but decreased blood insulin, adiponectin, and leptin levels compared to those of the control group (p < 0.001, p < 0.001, and p < 0.001, respectively). Administration of SA to STZ-induced diabetic mice may lower blood glucose but it increased the insulin levels with restoration of the size of the islets of Langerhans cells, implying that SA protected against STZ-induced diabetic states within the pancreas. At the molecular level, SA treatment exerts an increase in skeletal muscle expression levels of membrane glucose transporter 4 (GLUT4) and phospho-Akt to increase the membrane glucose uptake, but the mRNA levels of PEPCK and G6Pase are decreased to inhibit hepatic glucose production, thus leading to its hypoglycemic effect. Moreover, SA may cause hypolipidemic effects not only by enhancing hepatic expression levels of peroxisome proliferator-activated receptor α (PPARα) with increased fatty acid oxidation but also by reducing lipogenic fatty acid synthase (FAS) as well as reducing mRNA levels of sterol regulatory element binding protein (SREBP)1C and SREBP2 to lower blood TG and TC levels. Our findings demonstrated that SA displayed a protective effect against type 1 diabetes and a hyperlipidemic state in STZ-induced diabetic mice.
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Affiliation(s)
- Cheng-Hsiu Lin
- Department of Internal Medicine, Fengyuan Hospital, Ministry of Health and Welfare, Fengyuan District, Taichung 42055, Taiwan.
| | - Li-Wei Hsiao
- Division of Endocrinology and Metabolism, Chang Bing Show Chwan Memorial Hospital, Changhua 505, Taiwan.
| | - Yueh-Hsiung Kuo
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, Taichung 40402, Taiwan.
| | - Chun-Ching Shih
- Graduate Institute of Biotechnology and Biomedical Engineering, College of Health Science, Central Taiwan University of Science and Technology, No.666 Buzih Road, Beitun District, Taichung 40601, Taiwan.
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Lakstygal AM, de Abreu MS, Lifanov DA, Wappler-Guzzetta EA, Serikuly N, Alpsyshov ET, Wang D, Wang M, Tang Z, Yan D, Demin KA, Volgin AD, Amstislavskaya TG, Wang J, Song C, Alekseeva P, Kalueff AV. Zebrafish models of diabetes-related CNS pathogenesis. Prog Neuropsychopharmacol Biol Psychiatry 2019; 92:48-58. [PMID: 30476525 DOI: 10.1016/j.pnpbp.2018.11.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 11/18/2018] [Accepted: 11/22/2018] [Indexed: 12/12/2022]
Abstract
Diabetes mellitus (DM) is a common metabolic disorder that affects multiple organ systems. DM also affects brain processes, contributing to various CNS disorders, including depression, anxiety and Alzheimer's disease. Despite active research in humans, rodent models and in-vitro systems, the pathogenetic link between DM and brain disorders remains poorly understood. Novel translational models and new model organisms are therefore essential to more fully study the impact of DM on CNS. The zebrafish (Danio rerio) is a powerful novel model species to study metabolic and CNS disorders. Here, we discuss how DM alters brain functions and behavior in zebrafish, and summarize their translational relevance to studying DM-related CNS pathogenesis in humans. We recognize the growing utility of zebrafish models in translational DM research, as they continue to improve our understanding of different brain pathologies associated with DM, and may foster the discovery of drugs that prevent or treat these diseases.
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Affiliation(s)
- Anton M Lakstygal
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia; Laboratory of Preclinical Bioscreening, Granov Russian Research Center of Radiology and Surgical Technologies, Ministry of Healthcare of Russian Federation, Pesochny, Russia
| | - Murilo S de Abreu
- Bioscience Institute, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil; The International Zebrafish Neuroscience Research Consortium (ZNRC), Slidell, LA, USA
| | - Dmitry A Lifanov
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia; Laboratory of Preclinical Bioscreening, Granov Russian Research Center of Radiology and Surgical Technologies, Ministry of Healthcare of Russian Federation, Pesochny, Russia; School of Pharmacy, Southwest University, Chongqing, China
| | | | - Nazar Serikuly
- School of Pharmacy, Southwest University, Chongqing, China
| | | | - DongMei Wang
- School of Pharmacy, Southwest University, Chongqing, China
| | - MengYao Wang
- School of Pharmacy, Southwest University, Chongqing, China
| | - ZhiChong Tang
- School of Pharmacy, Southwest University, Chongqing, China
| | - DongNi Yan
- School of Pharmacy, Southwest University, Chongqing, China
| | - Konstantin A Demin
- Institute of Experimental Medicine, Almazov National Medical Research Centre, Ministry of Healthcare of Russian Federation, St. Petersburg, Russia; Laboratory of Biological Psychiatry, Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia
| | - Andrey D Volgin
- Scientific Research Institute of Physiology and Basic Medicine, Novosibirsk, Russia
| | | | - JiaJia Wang
- Institute for Marine Drugs and Nutrition, Guangdong Ocean University, Zhanjiang, China; Marine Medicine Development Center, Shenzhen Institute, Guangdong Ocean University, Shenzhen, China
| | - Cai Song
- Institute for Marine Drugs and Nutrition, Guangdong Ocean University, Zhanjiang, China; Marine Medicine Development Center, Shenzhen Institute, Guangdong Ocean University, Shenzhen, China
| | - Polina Alekseeva
- Institute of Experimental Medicine, Almazov National Medical Research Centre, Ministry of Healthcare of Russian Federation, St. Petersburg, Russia
| | - Allan V Kalueff
- School of Pharmacy, Southwest University, Chongqing, China; Institute of Experimental Medicine, Almazov National Medical Research Centre, Ministry of Healthcare of Russian Federation, St. Petersburg, Russia; Laboratory of Biological Psychiatry, Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia; Scientific Research Institute of Physiology and Basic Medicine, Novosibirsk, Russia; Ural Federal University, Ekaterinburg, Russia; Russian Scientific Center of Radiology and Surgical Technologies, Ministry of Healthcare of Russian Federation, Pesochny, Russia; ZENEREI Research Center, Slidell, LA, USA.
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15
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Sanna RS, Muthangi S, B K CS, Devi SA. Grape seed proanthocyanidin extract and insulin prevents cognitive decline in type 1 diabetic rat by impacting Bcl-2 and Bax in the prefrontal cortex. Metab Brain Dis 2019; 34:103-117. [PMID: 30284105 DOI: 10.1007/s11011-018-0320-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 09/17/2018] [Indexed: 01/21/2023]
Abstract
It is frequently accepted that grape seed proanthocyanidins (GSPs) are efficient antioxidants and beneficial in improving cognitive functions. However, diabetes (T1DM)-associated declines in learning and memory and the possibilities of GSPs in overcoming this loss needs to be examined. The present study was designed to examine the correlation, if one exists, between cognitive behavior and neuronal survival in the prefrontal cortex (PFC) in streptozotocin (STZ)-induced diabetic Wistar rats as well as to further clarify whether the correlation exists. Also this study aimed to determine whether neurological structural changes in the PFC and pancreatic β-cells can be restored by grape seed proanthocyanidin extract (GSPE). At the end of 8 weeks, cognitive tests that rats given supplementation of GSPE and insulin had greater improvement in their spatial learning and memory skills and improved neuronal survival in the PFC and pancreatic β-cells compared to rats supplemented with either insulin or GSPE alone. Expression of Bax in the PFC was increased in the diabetic rats while Bcl-2 expression was decreased, and GSPE and insulin treatment reversed the expression of apoptotic proteins. Our findings on GSPE, a natural product, as a form of adjuvant therapy together with insulin treatment is suggestive of the existence of synergism between the two in attenuating diabetic complications in the pancreas and PFC.
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Affiliation(s)
- Raja Sekhar Sanna
- Laboratory of Gerontology, Department of Zoology, Bangalore University, Bengaluru, 560056, India
| | | | - Chandrasekhar Sagar B K
- Department of Neuropathology, National Institute of Mental Health and Neurosciences, Bengaluru, 560029, India
| | - Sambe Asha Devi
- Laboratory of Gerontology, Department of Zoology, Bangalore University, Bengaluru, 560056, India.
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Vela D, Sopi RB, Mladenov M. Low Hepcidin in Type 2 Diabetes Mellitus: Examining the Molecular Links and Their Clinical Implications. Can J Diabetes 2018; 42:179-187. [DOI: 10.1016/j.jcjd.2017.04.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 04/18/2017] [Accepted: 04/21/2017] [Indexed: 01/14/2023]
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Harrington S, Williams SJ, Otte V, Barchman S, Jones C, Ramachandran K, Stehno-Bittel L. Improved yield of canine islet isolation from deceased donors. BMC Vet Res 2017; 13:264. [PMID: 28830425 PMCID: PMC5567429 DOI: 10.1186/s12917-017-1177-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 08/10/2017] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Canine diabetes is a strikingly prevalent and growing disease, and yet the standard treatment of a twice-daily insulin injection is both cumbersome to pet owners and only moderately effective. Islet transplantation has been performed with repeated success in canine research models, but has unfortunately not been made available to companion animals. Standard protocols for islet isolation, developed primarily for human islet transplantation, include beating-heart organ donation, vascular perfusion of preservation solutions, specialized equipment. Unfortunately, these processes are prohibitively complex and expensive for veterinary use. The aim of the study was to develop a simplified approach for isolating canine islets that is compatible with the financial and logistical restrictions inherent to veterinary medicine for the purpose of translating islet transplantation to a clinical treatment for canine diabetes. RESULTS Here, we describe simplified strategies for isolating quality islets from deceased canine donors without vascular preservation and with up to 90 min of cold ischemia time. An average of more than 1500 islet equivalents per kg of donor bodyweight was obtained with a purity of 70% (N = 6 animals). Islets were 95% viable and responsive to glucose stimulation for a week. We found that processing only the body and tail of the pancreas increased isolation efficiency without sacrificing islet total yield. Islet yield per gram of tissue increased from 773 to 1868 islet equivalents when the head of the pancreas was discarded (N = 3/group). CONCLUSIONS In summary, this study resulted in the development of an efficient and readily accessible method for obtaining viable and functional canine islets from deceased donors. These strategies provide an ethical means for obtaining donor islets.
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Affiliation(s)
| | - S Janette Williams
- University of Kansas Medical Center, MS 2002, Kansas City, KS, 66160, USA.,Likarda, LLC, 2002 W 39th Avenue, Kansas City, KS, 66103, USA
| | - Vern Otte
- State Line Animal Hospital, 2009 W 104th Street, Leawood, KS, 66206, USA
| | - Sally Barchman
- State Line Animal Hospital, 2009 W 104th Street, Leawood, KS, 66206, USA
| | - Cheryl Jones
- State Line Animal Hospital, 2009 W 104th Street, Leawood, KS, 66206, USA
| | | | - Lisa Stehno-Bittel
- University of Kansas Medical Center, MS 2002, Kansas City, KS, 66160, USA. .,Likarda, LLC, 2002 W 39th Avenue, Kansas City, KS, 66103, USA.
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18
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O'Kell AL, Wasserfall C, Catchpole B, Davison LJ, Hess RS, Kushner JA, Atkinson MA. Comparative Pathogenesis of Autoimmune Diabetes in Humans, NOD Mice, and Canines: Has a Valuable Animal Model of Type 1 Diabetes Been Overlooked? Diabetes 2017; 66:1443-1452. [PMID: 28533295 PMCID: PMC5440022 DOI: 10.2337/db16-1551] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 03/15/2017] [Indexed: 12/13/2022]
Abstract
Despite decades of research in humans and mouse models of disease, substantial gaps remain in our understanding of pathogenic mechanisms underlying the development of type 1 diabetes. Furthermore, translation of therapies from preclinical efforts capable of delaying or halting β-cell destruction has been limited. Hence, a pressing need exists to identify alternative animal models that reflect human disease. Canine insulin deficiency diabetes is, in some cases, considered to follow autoimmune pathogenesis, similar to NOD mice and humans, characterized by hyperglycemia requiring lifelong exogenous insulin therapy. Also similar to human type 1 diabetes, the canonical canine disorder appears to be increasing in prevalence. Whereas islet architecture in rodents is distinctly different from humans, canine pancreatic endocrine cell distribution is more similar. Differences in breed susceptibility alongside associations with MHC and other canine immune response genes parallel that of different ethnic groups within the human population, a potential benefit over NOD mice. The impact of environment on disease development also favors canine over rodent models. Herein, we consider the potential for canine diabetes to provide valuable insights for human type 1 diabetes in terms of pancreatic histopathology, impairment of β-cell function and mass, islet inflammation (i.e., insulitis), and autoantibodies specific for β-cell antigens.
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Affiliation(s)
- Allison L O'Kell
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Clive Wasserfall
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL
| | - Brian Catchpole
- Department of Pathology and Pathogen Biology, Royal Veterinary College, Hatfield, U.K
| | - Lucy J Davison
- Department of Veterinary Medicine, University of Cambridge, Cambridge, U.K., and Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, U.K
| | - Rebecka S Hess
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA
| | - Jake A Kushner
- McNair Medical Institute and Department of Pediatric Diabetes and Endocrinology, Baylor College of Medicine, Texas Children's Hospital, Houston, TX
| | - Mark A Atkinson
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL
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19
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Harrington S, Williams J, Rawal S, Ramachandran K, Stehno-Bittel L. Hyaluronic Acid/Collagen Hydrogel as an Alternative to Alginate for Long-Term Immunoprotected Islet Transplantation<sup/>. Tissue Eng Part A 2017; 23:1088-1099. [PMID: 28142500 DOI: 10.1089/ten.tea.2016.0477] [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] [Indexed: 11/12/2022] Open
Abstract
Alginate has long been the material of choice for immunoprotection of islets due to its low cost and ability to easily form microspheres. Unfortunately, this seaweed-derived material is notoriously prone to fibrotic overgrowth in vivo, resulting in premature graft failure. The purpose of this study was to test an alternative, hyaluronic acid (HA-COL), for in vitro function, viability, and allogeneic islet transplant outcomes in diabetic rats. In vitro studies indicated that the HA-COL gel had diffusion characteristics that would allow small molecules such as glucose and insulin to enter and exit the gel, whereas larger molecules (70 and 500 kDa dextrans) were impeded from diffusing past the gel edge in 24 h. Islets encapsulated in HA-COL hydrogel showed significantly improved in vitro viability over unencapsulated islets and retained their morphology and glucose sensitivity for 28 days. When unencapsulated allogeneic islet transplants were administered to the omentum of outbred rats, they initially were normoglycemic, but by 11 days returned to hyperglycemia. Immunohistological examination of the grafts and surrounding tissue indicated strong graft rejection. By comparison, when using the same outbred strain of rats, allogeneic transplantation of islets within the HA-COL gel reversed long-term diabetes and prevented graft rejection in all animals. Animals were sacrificed at 40, 52, 64, and 80 weeks for evaluation, and all were non-diabetic at sacrifice. Explanted grafts revealed viable islets in the transplant site as well as intact hydrogel, with little or no evidence of fibrotic overgrowth or cellular rejection. The results of these studies demonstrate great potential for HA-COL hydrogel as an alternative to sodium alginate for long-term immunoprotected islet transplantation.
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Affiliation(s)
- Stephen Harrington
- 1 School of Engineering, University of Kansas , Lawrence, Kansas.,2 University of Kansas Medical Center , Kansas City, Kansas.,3 Likarda, LLC, Kansas City, Kansas
| | - Janette Williams
- 2 University of Kansas Medical Center , Kansas City, Kansas.,3 Likarda, LLC, Kansas City, Kansas
| | - Sonia Rawal
- 2 University of Kansas Medical Center , Kansas City, Kansas
| | | | - Lisa Stehno-Bittel
- 1 School of Engineering, University of Kansas , Lawrence, Kansas.,2 University of Kansas Medical Center , Kansas City, Kansas.,3 Likarda, LLC, Kansas City, Kansas
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20
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Roh SS, Kwon OJ, Yang JH, Kim YS, Lee SH, Jin JS, Jeon YD, Yokozawa T, Kim HJ. Allium hookeri root protects oxidative stress-induced inflammatory responses and β-cell damage in pancreas of streptozotocin-induced diabetic rats. Altern Ther Health Med 2016; 16:63. [PMID: 26888412 PMCID: PMC4756415 DOI: 10.1186/s12906-016-1032-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 01/29/2016] [Indexed: 02/07/2023]
Abstract
Background Water extract from the root of Allium hookeri (AH) shows anti-inflammatory, antioxidant, and free radical scavenging effects. In this study, the ameliorating effects of AH on oxidative stress-induced inflammatory response and β-cell damage in the pancreas of streptozotocin (STZ)-induced type 1 diabetic rats were investigated. Methods AH (100 mg/kg body weight/day) was orally administered every day for 2 weeks to STZ-induced diabetic rats. After the final administration of AH, biochemical parameters including glucose, insulin, reactive oxygen species levels, and protein expressions related to antioxidant defense system in the pancreas of STZ-induced diabetic rats. Results The diabetic rats showed loss of body weight and increased pancreatic weight, while the oral administration of AH attenuated body and pancreatic weight changes. Moreover, the administration of AH caused a slightly decrease in the serum glucose level and a significant increase in the serum and pancreatic insulin levels in the diabetic rats. AH also significantly reduced the enhanced levels of reactive oxygen species, oxidative stress biomarker, in the serum and pancreas. The diabetic rats exhibited a down-regulation of the protein expression related to antioxidant defense system in the pancreas, but AH administration significantly up-regulated the expression of the heme oxygenase-1 (HO-1). Furthermore, AH treatment was reduced the overexpression of nuclear factor-kappa B (NF-кB)p65 and NF-кBp65-induced inflammatory cytokines such as tumor necrosis factor-α and interleukin-6. In addition, AH treatment was less pancreatic β-cell damaged compared with those of the diabetic rats. Conclusion These results provide important evidence that AH has a HO-1 activity on the oxidative stress conditions showing pancreato-protective effects against the development of inflammation in the diabetic rats. This study provides scientific evidence that AH protects the inflammatory responses by modulated NF-кBp65 signaling pathway through activation of HO-1 in the pancreas of STZ-induced diabetic rats.
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Tong J, Ma B, Ge L, Mo Q, Zhou G, He J, Wang Y. Dicaffeoylquinic Acid-Enriched Fraction of Cichorium glandulosum Seeds Attenuates Experimental Type 1 Diabetes via Multipathway Protection. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:10791-802. [PMID: 26586022 DOI: 10.1021/acs.jafc.5b04552] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Chicory has a major geographical presence in Europe and Asia. Cichorium glandulosum Boiss. et Huet, a genus Cichorium, is used for medicinal and food purposes in Asia. In this study, a dicaffeoylquinic acid-enriched fraction of C. glandulosum seeds n-BuOH fraction (CGSB) could ameliorate type 1 diabetes mellitus (T1DM) in streptozotocin (STZ)-induced diabetic mice with continuous administration for 2 weeks. CGSB treatment showed significantly higher plasma insulin levels but lower free fatty acids in adipose tissue and liver. Moreover, CGSB improved pancreatic islet mass. In vitro, different fractions of C. glandulosum seed (CGS) induced the differentiation of 3T3-L1 preadipocytes. The mRNA level for peroxisome proliferator-activated receptor alpha increased in high glucose treatment group in HepG2 cells, while CGSB significantly down-regulated the mRNA expression. The main compound of CGSB, 3,5-dicaffeoylquinic acid, was isolated and identified, which exhibited α-glucosidase inhibitory activity. These findings demonstrated that CGSB attenuated experimental T1DM via multipathway protection.
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Affiliation(s)
- Jing Tong
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences, Wuhan University , Wuhan 430071, P. R. China
| | - Bingxin Ma
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences, Wuhan University , Wuhan 430071, P. R. China
| | - Lanlan Ge
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences, Wuhan University , Wuhan 430071, P. R. China
| | - Qigui Mo
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences, Wuhan University , Wuhan 430071, P. R. China
| | - Gao Zhou
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences, Wuhan University , Wuhan 430071, P. R. China
| | - Jingsheng He
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences, Wuhan University , Wuhan 430071, P. R. China
| | - Youwei Wang
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences, Wuhan University , Wuhan 430071, P. R. China
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University , Wuhan 430072, P.R. China
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Somboonwong J, Traisaeng S, Saguanrungsirikul S. Moderate-intensity exercise training elevates serum and pancreatic zinc levels and pancreatic ZnT8 expression in streptozotocin-induced diabetic rats. Life Sci 2015; 139:46-51. [DOI: 10.1016/j.lfs.2015.08.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 07/16/2015] [Accepted: 08/01/2015] [Indexed: 01/17/2023]
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23
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Li P, Zhang L, Tian X, Xing J. Docosahexaenoic acid has an anti-diabetic effect in streptozotocin-induced diabetic mice. Int J Clin Exp Med 2014; 7:3021-3029. [PMID: 25356177 PMCID: PMC4211827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 07/06/2014] [Indexed: 06/04/2023]
Abstract
Consumption of fish oil-rich foods containing docosahexaenoic acid (DHA) can result in a low incidence of diabetes. The underlying mechanisms of these anti-hyperglycemic effects are ambiguous. This study aims to investigate the role of DHA in the prevention and treatment of type 1 diabetes in a murine model. Forty streptozotocin-induced diabetic mice were divided into control with diabetes, diabetes prevention (500 μg/kg DHA orally for 5 days) or diabetes treatment groups (DHA solvent in DMSO into the colon for 5 days). The groups were observed for 25 days after administration of DHA. Mice in the prevention and treatment group had shinier fur, increased body weight, significantly lower food and water intake and were more active compared with the control group with diabetes. Elevated insulin and liver SOD and T-AOC levels were also observed. Furthermore, islet cell apoptosis was reduced and islet cell GLP-1R expression increased.
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Affiliation(s)
- Ping Li
- Department of Developmental Pediatrics, The Second Affiliated Hospital of Jilin UniversityChangchun 130041, China
| | - Li Zhang
- Department of Pediatrics, Aerospace Center HospitalBeijing 10049, China
| | - Xin Tian
- Department of Developmental Pediatrics, The Second Affiliated Hospital of Jilin UniversityChangchun 130041, China
| | - Jie Xing
- Department of Developmental Pediatrics, The Second Affiliated Hospital of Jilin UniversityChangchun 130041, China
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