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Accelerated Generation of Extra-Islet Insulin-Producing Cells in Diabetic Rats, Treated with Sodium Phthalhydrazide. Int J Mol Sci 2022; 23:ijms23084286. [PMID: 35457103 PMCID: PMC9044743 DOI: 10.3390/ijms23084286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 04/01/2022] [Accepted: 04/11/2022] [Indexed: 12/19/2022] Open
Abstract
β-cells dysfunction plays an important role in the pathogenesis of type 2 diabetes (T2D), partially may be compensated by the generation of extra-islet insulin-producing cells (IPCs) in pancreatic acini and ducts. Pdx1 expression and inflammatory level are suggested to be involved in the generation of extra-islet IPCs, but the exact reasons and mechanisms of it are unclear. Macrophages are key inflammatory mediators in T2D. We studied changes in mass and characteristics of extra-islet IPCs in rats with a streptozotocin-nicotinamide model of T2D and after i.m. administration of 20 daily doses of 2 mg/kg b.w. sodium aminophthalhydrazide (APH). Previously, we found that APH modulates macrophage production and increases the proliferative activity of pancreatic β-cells. Expressions of insulin and Pdx1, as well as F4/80 (macrophage marker), were detected at the protein level by immunohistochemistry analysis, the concentration of pro- and anti-inflammatory cytokines in blood and pancreas—by ELISA. Diabetic rats treated with APH showed an increasing mass of extra-islet IPCs and the content of insulin in them. The presence of Pdx1+ cells in the exocrine pancreas also increased. F4/80+ cell reduction was accompanied by increasing TGF-β1 content. Interestingly, during the development of diabetes, the mass of β-cells decreased faster than the mass of extra-islet IPCs, and extra-islet IPCs reacted to experimental T2D differently depending on their acinar or ductal location.
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Sabouri E, Rajabzadeh A, Enderami SE, Saburi E, Soleimanifar F, Barati G, Rahmati M, Khamisipour G, Enderami SE. The Role of MicroRNAs in the Induction of Pancreatic Differentiation. Curr Stem Cell Res Ther 2021; 16:145-154. [PMID: 32564764 DOI: 10.2174/1574888x15666200621173607] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 04/15/2020] [Accepted: 04/20/2020] [Indexed: 11/22/2022]
Abstract
Stem cell-based therapy is one of the therapeutic options with promising results in the treatment of diabetes. Stem cells from various sources are expanded and induced to generate the cells capable of secreting insulin. These insulin-producing cells [IPCs] could be used as an alternative to islets in the treatment of patients with diabetes. Soluble growth factors, small molecules, geneencoding transcription factors, and microRNAs [miRNAs] are commonly used for the induction of stem cell differentiation. MiRNAs are small non-coding RNAs with 21-23 nucleotides that are involved in the regulation of gene expression by targeting multiple mRNA targets. Studies have shown the dynamic expression of miRNAs during pancreatic development and stem cell differentiation. MiR- 7 and miR-375 are the most abundant miRNAs in pancreatic islet cells and play key roles in pancreatic development as well as islet cell functions. Some studies have tried to use these small RNAs for the induction of pancreatic differentiation. This review focuses on the miRNAs used in the induction of stem cells into IPCs and discusses their functions in pancreatic β-cells.
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Affiliation(s)
- Elham Sabouri
- Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Alireza Rajabzadeh
- Applied Cell Sciences and Tissue Engineering Department, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyedeh Elnaz Enderami
- Department of Stem Cell and Regenerative Medicine, Institute of Medical Biotechnology, National Institute of Genetic Engineering and Biotechnology [NIGEB], Tehran, Iran
| | - Ehsan Saburi
- Medical Genetics and Molecular Medicine Department, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Fatemeh Soleimanifar
- Department of Medical Biotechnology, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
| | | | | | - Gholamreza Khamisipour
- Department of Hematology, School of Allied Medical Sciences, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Seyed Ehsan Enderami
- Diabetes Research Center, Department of Medical Biotechnology, Faculty of Advanced Technologies in Medicine, Mazandaran University of Medical Sciences, Sari, Iran
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Bone RN, Oyebamiji O, Talware S, Selvaraj S, Krishnan P, Syed F, Wu H, Evans-Molina C. A Computational Approach for Defining a Signature of β-Cell Golgi Stress in Diabetes. Diabetes 2020; 69:2364-2376. [PMID: 32820009 PMCID: PMC7576569 DOI: 10.2337/db20-0636] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 08/07/2020] [Indexed: 02/06/2023]
Abstract
The Golgi apparatus (GA) is an important site of insulin processing and granule maturation, but whether GA organelle dysfunction and GA stress are present in the diabetic β-cell has not been tested. We used an informatics-based approach to develop a transcriptional signature of β-cell GA stress using existing RNA sequencing and microarray data sets generated using human islets from donors with diabetes and islets where type 1 (T1D) and type 2 (T2D) diabetes had been modeled ex vivo. To narrow our results to GA-specific genes, we applied a filter set of 1,030 genes accepted as GA associated. In parallel, we generated an RNA-sequencing data set from human islets treated with brefeldin A (BFA), a known GA stress inducer. Overlapping the T1D and T2D groups with the BFA data set, we identified 120 and 204 differentially expressed genes, respectively. In both the T1D and T2D models, pathway analyses revealed that the top pathways were associated with GA integrity, organization, and trafficking. Quantitative RT-PCR was used to validate a common signature of GA stress that included ATF3, ARF4, CREB3, and COG6 Taken together, these data indicate that GA-associated genes are dysregulated in diabetes and identify putative markers of β-cell GA stress.
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Affiliation(s)
- Robert N Bone
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN
- Center for Diabetes and Metabolic Diseases, Indiana University School of Medicine, Indianapolis, IN
- Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Olufunmilola Oyebamiji
- Department of BioHealth Informatics, Indiana University-Purdue University Indianapolis, Indianapolis, IN
| | - Sayali Talware
- Department of BioHealth Informatics, Indiana University-Purdue University Indianapolis, Indianapolis, IN
| | - Sharmila Selvaraj
- Department of BioHealth Informatics, Indiana University-Purdue University Indianapolis, Indianapolis, IN
| | - Preethi Krishnan
- Center for Diabetes and Metabolic Diseases, Indiana University School of Medicine, Indianapolis, IN
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
| | - Farooq Syed
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN
- Center for Diabetes and Metabolic Diseases, Indiana University School of Medicine, Indianapolis, IN
- Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Huanmei Wu
- Department of BioHealth Informatics, Indiana University-Purdue University Indianapolis, Indianapolis, IN
| | - Carmella Evans-Molina
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN
- Center for Diabetes and Metabolic Diseases, Indiana University School of Medicine, Indianapolis, IN
- Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN
- Richard L. Roudebush VA Medical Center, Indianapolis, IN
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Protein malnutrition early in life increased apoptosis but did not alter the β-cell mass during gestation. Br J Nutr 2020; 125:1111-1124. [PMID: 32912341 DOI: 10.1017/s0007114520003554] [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] [Indexed: 11/07/2022]
Abstract
We evaluated whether early-life protein restriction alters structural parameters that affect β-cell mass on the 15th day and 20th day of gestation in control pregnant (CP), control non-pregnant (CNP), low-protein pregnant (LPP) and low-protein non-pregnant (LPNP) rats from the fetal to the adult life stage as well as in protein-restricted rats that recovered after weaning (recovered pregnant (RP) and recovered non-pregnant). On the 15th day of gestation, the CNP group had a higher proportion of smaller islets, whereas the CP group exhibited a higher proportion of islets larger than the median. The β-cell mass was lower in the low-protein group than that in the recovered and control groups. Gestation increased the β-cell mass, β-cell proliferation frequency and neogenesis frequency independently of the nutritional status. The apoptosis frequency was increased in the recovered groups compared with that in the other groups. On the 20th day of gestation, a higher proportion of islets smaller than the median was observed in the non-pregnant groups, whereas a higher proportion of islets larger than the median was observed in the RP, LPP and CP groups. β-Cell mass was lower in the low-protein group than that in the recovered and control groups, regardless of the physiological status. The β-cell proliferation frequency was lower, whereas the apoptosis rate was higher in recovered rats compared with those in the low-protein and control rats. Thus, protein malnutrition early in life did not alter the mass of β-cells, especially in the first two-thirds of gestation, despite the increase in apoptosis.
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Tasyurek HM, Altunbas HA, Balci MK, Griffith TS, Sanlioglu S. Therapeutic Potential of Lentivirus-Mediated Glucagon-Like Peptide-1 Gene Therapy for Diabetes. Hum Gene Ther 2018; 29:802-815. [PMID: 29409356 DOI: 10.1089/hum.2017.180] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Postprandial glucose-induced insulin secretion from the islets of Langerhans is facilitated by glucagon-like peptide-1 (GLP-1)-a metabolic hormone with insulinotropic properties. Among the variety of effects it mediates, GLP-1 induces delta cell secretion of somatostatin, inhibits alpha cell release of glucagon, reduces gastric emptying, and slows food intake. These events collectively contribute to weight loss over time. During type 2 diabetes (T2DM), however, the incretin response to glucose is reduced and accompanied by a moderate reduction in GLP-1 secretion. To compensate for the reduced incretin effect, a human immunodeficiency virus-based lentiviral vector was generated to deliver DNA encoding human GLP-1 (LentiGLP-1), and the anti-diabetic efficacy of LentiGLP-1 was tested in a high-fat diet/streptozotocin-induced model of T2DM. Therapeutic administration of LentiGLP-1 reduced blood glucose levels in obese diabetic Sprague Dawley rats, along with improving insulin sensitivity and glucose tolerance. Normoglycemia was correlated with increased blood GLP-1 and pancreatic beta cell regeneration in LentiGLP-1-treated rats. Plasma triglyceride levels were also normalized after LentiGLP-1 injection. Collectively, these data suggest the clinical potential of GLP-1 gene transfer therapy for the treatment of T2DM.
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Affiliation(s)
- Hale M Tasyurek
- 1 Human Gene and Cell Therapy Center of Akdeniz University Hospitals , Antalya, Turkey
| | - Hasan Ali Altunbas
- 2 Department of Internal Medicine, Division of Endocrinology and Metabolism, Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Mustafa Kemal Balci
- 2 Department of Internal Medicine, Division of Endocrinology and Metabolism, Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Thomas S Griffith
- 3 Department of Urology, University of Minnesota , School of Medicine, Minneapolis, Minnesota
| | - Salih Sanlioglu
- 1 Human Gene and Cell Therapy Center of Akdeniz University Hospitals , Antalya, Turkey
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Anti-Diabetic Effect of Organo-Chalcogen (Sulfur and Selenium) Zinc Complexes with Hydroxy-Pyrone Derivatives on Leptin-Deficient Type 2 Diabetes Model ob/ob Mice. Int J Mol Sci 2017; 18:ijms18122647. [PMID: 29215553 PMCID: PMC5751249 DOI: 10.3390/ijms18122647] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 11/30/2017] [Accepted: 12/02/2017] [Indexed: 12/12/2022] Open
Abstract
Since the discovery of the anti-diabetic effects of zinc (Zn) complex, we synthesized several Zn complexes and evaluated their effects using the KKAy type 2 diabetes mouse model. Recently, we demonstrated that organo-chalcogen (sulfur and selenium) Zn complexes elicit strong anti-diabetic effects. In this study, we treated leptin-deficient ob/ob mice with organo-chalcogen Zn complexes, and evaluated the resulting anti-diabetic effects in a mouse model of diabetes arising from pathogenic mechanisms different from those in KKAy mice. C57BL/6J ob/ob mice orally received either bis(3-hydroxy-2-methyl-4(H)-pyran-4-thiono)Zn, [Zn(hmpt)2] or bis(3-hydroxy-2-methyl-4(H)-pyran-4-seleno)Zn, [Zn(hmps)2], daily for 28 days. Both Zn complexes elicited potent blood glucose-lowering effects and improved HbA1c values. Moreover, glucose intolerance improved as evidenced by the oral glucose tolerance test, and fasting plasma insulin levels decreased in both types of Zn complex-treated mice. Zn concentrations in the liver and pancreas of [Zn(hmpt)2]-treated mice and in the pancreas of [Zn(hmps)2]-treated mice were increased, respectively. The results suggest that the present Zn complexes mainly exerted an anti-diabetic effect in the liver or pancreas. This study is the first to demonstrate that potent Zn complexes elicit anti-diabetic effects in not only KKAy but also ob/ob mice via a normalizing effect on insulin secretion and fasting blood glucose levels.
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Ulasov AV, Rosenkranz AA, Sobolev AS. Transcription factors: Time to deliver. J Control Release 2017; 269:24-35. [PMID: 29113792 DOI: 10.1016/j.jconrel.2017.11.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 11/02/2017] [Accepted: 11/03/2017] [Indexed: 12/17/2022]
Abstract
Transcription factors (TFs) are at the center of the broad regulatory network orchestrating gene expression programs that elicit different biological responses. For a long time, TFs have been considered as potent drug targets due to their implications in the pathogenesis of a variety of diseases. At the same time, TFs, located at convergence points of cellular regulatory pathways, are powerful tools providing opportunities both for cell type change and for managing the state of cells. This task formulation requires the TF modulation problem to come to the fore. We review several ways to manage TF activity (small molecules, transfection, nanocarriers, protein-based approaches), analyzing their limitations and the possibilities to overcome them. Delivery of TFs could revolutionize the biomedical field. Whether this forecast comes true will depend on the ability to develop convenient technologies for targeted delivery of TFs.
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Affiliation(s)
- Alexey V Ulasov
- Department of Molecular Genetics of Intracellular Transport, Institute of Gene Biology, Russian Academy of Sciences, 34/5 Vavilov St., 119334 Moscow, Russia
| | - Andrey A Rosenkranz
- Department of Molecular Genetics of Intracellular Transport, Institute of Gene Biology, Russian Academy of Sciences, 34/5 Vavilov St., 119334 Moscow, Russia; Faculty of Biology, Moscow State University, 1-12 Leninskiye Gory St., 119234 Moscow, Russia
| | - Alexander S Sobolev
- Department of Molecular Genetics of Intracellular Transport, Institute of Gene Biology, Russian Academy of Sciences, 34/5 Vavilov St., 119334 Moscow, Russia; Faculty of Biology, Moscow State University, 1-12 Leninskiye Gory St., 119234 Moscow, Russia.
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Ito K, Ookawara S, Ishibashi K, Morishita Y. Transgene and islet cell delivery systems using nano-sized carriers for the treatment of diabetes mellitus. NANO REVIEWS & EXPERIMENTS 2017; 8:1341758. [PMID: 30410709 PMCID: PMC6167029 DOI: 10.1080/20022727.2017.1341758] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 06/05/2017] [Indexed: 11/09/2022]
Abstract
Gene therapy that targets the pancreas and intestines with delivery systems using nano-sized carriers such as viral and non-viral vectors could improve the control of blood glucose levels, resulting in an improved prognosis for patients with diabetes mellitus. Allogenic pancreatic islet cell transplantations using such delivery systems have been developed as therapeutic options for diabetes mellitus. This review focuses on transgenes and islet cell delivery systems using nano-sized carriers for the treatment of diabetes mellitus.
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Affiliation(s)
- Kiyonori Ito
- Division of Nephrology, First Department of Integrated Medicine, Saitama Medical Center, Jichi Medical University, Saitama, Japan
| | - Susumu Ookawara
- Division of Nephrology, First Department of Integrated Medicine, Saitama Medical Center, Jichi Medical University, Saitama, Japan
| | - Kenichi Ishibashi
- Department of Medical Physiology, Meiji Pharmaceutical University, Tokyo, Japan
| | - Yoshiyuki Morishita
- Division of Nephrology, First Department of Integrated Medicine, Saitama Medical Center, Jichi Medical University, Saitama, Japan
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Lu J, Lin L, Dong H, Meng X, Fang F, Wang Q, Huang L, Tan J. Protein therapy using MafA fused to a polyarginine transduction domain attenuates glucose levels of streptozotocin‑induced diabetic mice. Mol Med Rep 2017; 15:4041-4048. [PMID: 28487936 PMCID: PMC5436157 DOI: 10.3892/mmr.2017.6536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 02/21/2017] [Indexed: 12/02/2022] Open
Abstract
Ectopic expression of musculo aponeurotic fibrosarcoma BZIP transcription factor (Maf) A, has previously been demonstrated to induce insulin expression in non-β-cell lines. Protein transduction domains acting as an alternative delivery strategy may deliver heterogeneous proteins into cells. A sequence of 11 arginine residues (11R) has been demonstrated to act as a particularly efficient vector to introduce proteins into various cell types. The present study constructed 11R-fused MafA to achieve transduction of the protein into cellular membranes and subsequently examined the therapeutic effect of the MafA-11R protein in streptozotocin-induced diabetes. A small animal imaging system was used to demonstrate that 11R introduced proteins into cells. The MafA-11R protein was then injected into the tale vein of healthy male mice, and western blot analysis and immunofluorescence staining was performed to identify the location of the recombinant protein. Ameliorated hyperglycemia in the MafA-11R-treated diabetic mice was demonstrated via the improved intraperitoneal glucose tolerance test (IPGTT) and glucose-stimulated insulin release. Furthermore, insulin producing cells were detected in the jejunum of the MafA-11R treated mice. The results of the present study indicated that MafA-11R delivery may act as a novel and potential therapeutic strategy for the future and will not present adverse effects associated with viral vector-mediated gene therapies.
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Affiliation(s)
- Jun Lu
- Fujian Provincial Key Laboratory of Transplant Biology, Fuzhou General Hospital, Xiamen University, Fuzhou, Fujian 350025, P.R. China
| | - Lingjing Lin
- Fujian Provincial Key Laboratory of Transplant Biology, Fuzhou General Hospital, Xiamen University, Fuzhou, Fujian 350025, P.R. China
| | - Huiyue Dong
- Fujian Provincial Key Laboratory of Transplant Biology, Fuzhou General Hospital, Xiamen University, Fuzhou, Fujian 350025, P.R. China
| | - Xin Meng
- Fujian Provincial Key Laboratory of Transplant Biology, Fuzhou General Hospital, Xiamen University, Fuzhou, Fujian 350025, P.R. China
| | - Fang Fang
- Department of Stomatology, Fujian Provincial Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Qinghua Wang
- Fujian Provincial Key Laboratory of Transplant Biology, Fuzhou General Hospital, Xiamen University, Fuzhou, Fujian 350025, P.R. China
| | - Lianghu Huang
- Fujian Provincial Key Laboratory of Transplant Biology, Fuzhou General Hospital, Xiamen University, Fuzhou, Fujian 350025, P.R. China
| | - Jianming Tan
- Fujian Provincial Key Laboratory of Transplant Biology, Fuzhou General Hospital, Xiamen University, Fuzhou, Fujian 350025, P.R. China
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Sharma A, Yerra VG, Kumar A. Emerging role of Hippo signalling in pancreatic biology: YAP re-expression and plausible link to islet cell apoptosis and replication. Biochimie 2017; 133:56-65. [DOI: 10.1016/j.biochi.2016.12.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 12/12/2016] [Indexed: 02/07/2023]
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Miyazaki S, Tashiro F, Miyazaki JI. Transgenic Expression of a Single Transcription Factor Pdx1 Induces Transdifferentiation of Pancreatic Acinar Cells to Endocrine Cells in Adult Mice. PLoS One 2016; 11:e0161190. [PMID: 27526291 PMCID: PMC4985130 DOI: 10.1371/journal.pone.0161190] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Accepted: 08/01/2016] [Indexed: 01/17/2023] Open
Abstract
A promising approach to new diabetes therapies is to generate β cells from other differentiated pancreatic cells in vivo. Because the acinar cells represent the most abundant cell type in the pancreas, an attractive possibility is to reprogram acinar cells into β cells. The transcription factor Pdx1 (Pancreas/duodenum homeobox protein 1) is essential for pancreatic development and cell lineage determination. Our objective is to examine whether exogenous expression of Pdx1 in acinar cells of adult mice might induce reprogramming of acinar cells into β cells. We established a transgenic mouse line in which Pdx1 and EGFP (enhanced green fluorescent protein) could be inducibly expressed in the acinar cells. After induction of Pdx1, we followed the acinar cells for their expression of exocrine and endocrine markers using cell-lineage tracing with EGFP. The acinar cell-specific expression of Pdx1 in adult mice reprogrammed the acinar cells as endocrine precursor cells, which migrated into the pancreatic islets and differentiated into insulin-, somatostatin-, or PP (pancreatic polypeptide)-producing endocrine cells, but not into glucagon-producing cells. When the mice undergoing such pancreatic reprogramming were treated with streptozotocin (STZ), the newly generated insulin-producing cells were able to ameliorate STZ-induced diabetes. This paradigm of in vivo reprogramming indicates that acinar cells hold promise as a source for new islet cells in regenerative therapies for diabetes.
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Affiliation(s)
- Satsuki Miyazaki
- Division of Stem Cell Regulation Research, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan
| | - Fumi Tashiro
- Division of Stem Cell Regulation Research, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan
| | - Jun-ichi Miyazaki
- Division of Stem Cell Regulation Research, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan
- * E-mail:
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PAX4 Gene Transfer Induces α-to-β Cell Phenotypic Conversion and Confers Therapeutic Benefits for Diabetes Treatment. Mol Ther 2015; 24:251-260. [PMID: 26435408 DOI: 10.1038/mt.2015.181] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 09/25/2015] [Indexed: 12/19/2022] Open
Abstract
The transcription factor Pax4 plays a critical role in the determination of α- versus β-cell lineage during endocrine pancreas development. In this study, we explored whether Pax4 gene transfer into α-cells could convert them into functional β-cells and thus provide therapeutic benefits for insulin-deficient diabetes. We found that Pax4 delivered by adenoviral vector, Ad5.Pax4, induced insulin expression and reduced glucagon expression in αTC1.9 cells. More importantly, these cells exhibited glucose-stimulated insulin secretion, a key feature of functional β-cells. When injected into streptozotocin-induced diabetic mice, Pax4-treated αTC1.9 cells significantly reduced blood glucose, and the mice showed better glucose tolerance, supporting that Pax4 gene transfer into αTC1.9 cells resulted in the formation of functional β-cells. Furthermore, treatment of primary human islets with Ad5.Pax4 resulted in significantly improved β-cell function. Detection of glucagon(+)/Pax4(+)/Insulin(+) cells argued for Pax4-induced α-to-β cell transitioning. This was further supported by quantification of glucagon and insulin bi-hormonal cells, which was significantly higher in Pax4-treated islets than in controls. Finally, direct administration of Ad5.Pax4 into the pancreas of insulin-deficient mice ameliorated hyperglycemia. Taken together, our data demonstrate that manipulating Pax4 gene expression represents a viable therapeutic strategy for the treatment of insulin deficient diabetes.
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13
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Uncovering the mechanisms of beta-cell neogenesis and maturation toward development of a regenerative therapy for diabetes. Diabetol Int 2015. [DOI: 10.1007/s13340-015-0233-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Chiou SH, Winters IP, Wang J, Naranjo S, Dudgeon C, Tamburini FB, Brady JJ, Yang D, Grüner BM, Chuang CH, Caswell DR, Zeng H, Chu P, Kim GE, Carpizo DR, Kim SK, Winslow MM. Pancreatic cancer modeling using retrograde viral vector delivery and in vivo CRISPR/Cas9-mediated somatic genome editing. Genes Dev 2015; 29:1576-85. [PMID: 26178787 PMCID: PMC4526740 DOI: 10.1101/gad.264861.115] [Citation(s) in RCA: 172] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 06/19/2015] [Indexed: 12/15/2022]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a genomically diverse, prevalent, and almost invariably fatal malignancy. Although conventional genetically engineered mouse models of human PDAC have been instrumental in understanding pancreatic cancer development, these models are much too labor-intensive, expensive, and slow to perform the extensive molecular analyses needed to adequately understand this disease. Here we demonstrate that retrograde pancreatic ductal injection of either adenoviral-Cre or lentiviral-Cre vectors allows titratable initiation of pancreatic neoplasias that progress into invasive and metastatic PDAC. To enable in vivo CRISPR/Cas9-mediated gene inactivation in the pancreas, we generated a Cre-regulated Cas9 allele and lentiviral vectors that express Cre and a single-guide RNA. CRISPR-mediated targeting of Lkb1 in combination with oncogenic Kras expression led to selection for inactivating genomic alterations, absence of Lkb1 protein, and rapid tumor growth that phenocopied Cre-mediated genetic deletion of Lkb1. This method will transform our ability to rapidly interrogate gene function during the development of this recalcitrant cancer.
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Affiliation(s)
- Shin-Heng Chiou
- Department of Genetics, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Ian P Winters
- Department of Genetics, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Jing Wang
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, California 94305, USA; Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Santiago Naranjo
- Department of Genetics, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Crissy Dudgeon
- Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey 08903, USA; Department of Surgery, Rutgers Robert Wood Johnson University Medical School, New Brunswick, New Jersey 08903, USA; Department of Pharmacology, Rutgers Robert Wood Johnson University Medical School, New Brunswick, New Jersey 08903, USA
| | - Fiona B Tamburini
- Department of Genetics, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Jennifer J Brady
- Department of Genetics, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Dian Yang
- Cancer Biology Program, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Barbara M Grüner
- Department of Genetics, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Chen-Hua Chuang
- Department of Genetics, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Deborah R Caswell
- Cancer Biology Program, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Hong Zeng
- Stanford Cancer Institute, Stanford University School of Medicine, Stanford, California 94305, USA; Transgenic, Knockout, and Tumor Model Center, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Pauline Chu
- Department of Comparative Medicine, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Grace E Kim
- Department of Pathology, University of California at San Francisco, San Francisco, California 94143, USA
| | - Darren R Carpizo
- Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey 08903, USA; Department of Surgery, Rutgers Robert Wood Johnson University Medical School, New Brunswick, New Jersey 08903, USA; Department of Pharmacology, Rutgers Robert Wood Johnson University Medical School, New Brunswick, New Jersey 08903, USA
| | - Seung K Kim
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, California 94305, USA; Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Monte M Winslow
- Department of Genetics, Stanford University School of Medicine, Stanford, California 94305, USA; Cancer Biology Program, Stanford University School of Medicine, Stanford, California 94305, USA; Stanford Cancer Institute, Stanford University School of Medicine, Stanford, California 94305, USA; Department of Pathology, Stanford University School of Medicine, Stanford, California 94305, USA
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Kaneto H, Matsuoka TA. Role of pancreatic transcription factors in maintenance of mature β-cell function. Int J Mol Sci 2015; 16:6281-97. [PMID: 25794287 PMCID: PMC4394532 DOI: 10.3390/ijms16036281] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 02/10/2015] [Accepted: 02/16/2015] [Indexed: 12/12/2022] Open
Abstract
A variety of pancreatic transcription factors including PDX-1 and MafA play crucial roles in the pancreas and function for the maintenance of mature β-cell function. However, when β-cells are chronically exposed to hyperglycemia, expression and/or activities of such transcription factors are reduced, which leads to deterioration of β-cell function. These phenomena are well known as β-cell glucose toxicity in practical medicine as well as in the islet biology research area. Here we describe the possible mechanism for β-cell glucose toxicity found in type 2 diabetes. It is likely that reduced expression levels of PDX-1 and MafA lead to suppression of insulin biosynthesis and secretion. In addition, expression levels of incretin receptors (GLP-1 and GIP receptors) in β-cells are decreased, which likely contributes to the impaired incretin effects found in diabetes. Taken together, down-regulation of insulin gene transcription factors and incretin receptors explains, at least in part, the molecular mechanism for β-cell glucose toxicity.
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Affiliation(s)
- Hideaki Kaneto
- Department of Diabetes, Endocrinology and Metabolism, Kawasaki Medical School, 577, Matsushima, Kurashiki 701-0192, Japan.
| | - Taka-aki Matsuoka
- Department of Metabolic Medicine, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan.
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16
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Handorf AM, Sollinger HW, Alam T. Genetic Engineering of Surrogate <i>β</i> Cells for Treatment of Type 1 Diabetes Mellitus. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/jdm.2015.54037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Gerace D, Martiniello-Wilks R, O'Brien BA, Simpson AM. The use of β-cell transcription factors in engineering artificial β cells from non-pancreatic tissue. Gene Ther 2014; 22:1-8. [DOI: 10.1038/gt.2014.93] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 09/04/2014] [Accepted: 09/18/2014] [Indexed: 01/03/2023]
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18
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Shrestha N, Araújo F, Sarmento B, Hirvonen J, Santos HA. Gene-based therapy for Type 1 diabetes mellitus: viral and nonviral vectors. ACTA ACUST UNITED AC 2014. [DOI: 10.2217/dmt.14.31] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Phillips N, Kay MA. Characterization of vector-based delivery of neurogenin-3 in murine diabetes. Hum Gene Ther 2014; 25:651-61. [PMID: 24635696 DOI: 10.1089/hum.2013.206] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Treatment of type 1 diabetes with gene transfer-induced cellular reprogramming requires a pancreatic transcription factor such as Neurogenin-3 (Ngn3) and as of yet unknown component of the adenoviral particle. Despite intensive study, there are many unsolved processes related to the mechanisms and physiological parameters related to diabetes correction using this approach. While we confirm that systemic delivery of adenovirus (Ad)-Ngn3 provides long-lasting correction of streptozotocin (STZ)-induced hyperglycemia and restoration of growth curves, we found that insulin levels and glucose tolerance tests are not fully restored. By altering the innate and antigen-specific immune responses, we establish that the former likely plays some role in the reprogramming process. Interestingly, Ad-hNgn3 therapy in diabetic animals appeared to protect them from secondary STZ challenge. The resistance to secondary STZ response was more pronounced at later time points, indicating that a period of cell maturation and/or expansion may be required in order to promote lasting correction. More importantly, these results suggest that the long-term reprogrammed cells are not fully reprogrammed into β-cells, which in the case of autoimmune diabetes may be advantageous in a long-term treatment strategy. Finally, we show that the prophylactic administration of Ad-hNgn3 before diabetic induction protected mice from developing hyperglycemia, demonstrating the potential for reducing or eliminating disease progression should treatment be initiated early or before onset of symptoms.
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Affiliation(s)
- Neil Phillips
- 1 Departments of Pediatrics and Genetics, Stanford University , Stanford, CA 94305
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20
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Abstract
Glucagon-like peptide (GLP)-1 is an incretin hormone with several antidiabetic functions including stimulation of glucose-dependent insulin secretion, increase in insulin gene expression and beta-cell survival. Despite the initial technical difficulties and profound inefficiency of direct gene transfer into the pancreas that seriously restricted in vivo gene transfer experiments with GLP-1, recent exploitation of various routes of gene delivery and alternative means of gene transfer has permitted the detailed assessment of the therapeutic efficacy of GLP-1 in animal models of type 2 diabetes (T2DM). As a result, many clinical benefits of GLP-1 peptide/analogues observed in clinical trials involving induction of glucose tolerance, reduction of hyperglycaemia, suppression of appetite and food intake linked to weight loss have been replicated in animal models using gene therapy. Furthermore, GLP-1-centered gene therapy not only improved insulin sensitivity, but also reduced abdominal and/or hepatic fat associated with obesity-induced T2DM with drastic alterations in adipokine profiles in treated subjects. Thus, a comprehensive assessment of recent GLP-1-mediated gene therapy approaches with detailed analysis of current hurdles and resolutions, is discussed.
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Abstract
OBJECTIVE Pancreatic islets are notoriously difficult to efficiently transduce genes with viruses whether in vivo or ex vivo, the latter only transducing superficial layers of the islet. To improve efficiency of transduction, we explored surgical approaches to virus delivery in vivo. METHODS A technique was developed for retrograde surgical perfusion into the rat biliopancreatic duct with a test adenovirus containing a construct coexpressing green fluorescent protein, the latter for detection of infected cells. RESULTS Pancreatic islets isolated after acute pancreatic infusion and cultured for 2 days showed expression in the entire islet and in almost all islets. When rats were recovered from the surgery, and then islets isolated at 1 and 8 weeks after surgery, we continued to see extensive islet green fluorescent protein expression, albeit at more reduced levels at 8 weeks. CONCLUSIONS This strategy of surgical pancreatic ductal perfusion of viruses is an effective way to transduce or reduce gene expression in pancreatic islets for both acute and chronic study.
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Vishwakarma SK, Rahamathulla S, Bardia A, Tiwari SK, Srinivas G, Raj A, Tripura C, Sandhya A, Habeeb MA, Khan AA, Pande G, Reddy KP, Reddy PY. In vitro quantitative and relative gene expression analysis of pancreatic transcription factors Pdx-1, Ngn-3, Isl-1, Pax-4, Pax-6 and Nkx-6.1 in trans-differentiated human hepatic progenitors. J Diabetes Investig 2014; 5:492-500. [PMID: 25411615 PMCID: PMC4188105 DOI: 10.1111/jdi.12193] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Revised: 11/22/2013] [Accepted: 11/26/2013] [Indexed: 12/21/2022] Open
Abstract
Aims/Introduction Diabetes is a major health concern throughout the world because of its increasing prevalence in epidemic proportions. β‐Cell deterioration in the pancreas is a crucial factor for the progression of diabetes mellitus. Therefore, the restoration of β‐cell mass and its function is of vital importance for the development of effective therapeutic strategies and most accessible cell sources for the treatment of diabetes mellitus. Materials and Methods Human fetuses (12–20 weeks gestation age) were used to isolate human hepatic progenitor cells (hHPCs) from fetal liver using a two‐step collagenase digestion method. Epithelial cell adhesion molecule‐positive (EpCAM+ve)‐enriched hHPCs were cultured in vitro and induced with 5–30 mmol/L concentration of glucose for 0–32 h. Pdx‐1 expression and insulin secretion was analyzed using immunophenotypic and chemifluorescence assays, respectively. Relative gene expression was quantified in induced hHPCs, and compared with uninduced and pancreatic cells to identify the activated transcription factors (Pdx‐1, Ngn‐3, Isl‐1, Pax‐4, Pax‐6 and Nkx‐6.1) involved in β‐cell production. Results EpCAM+ve cells derived from human fetal liver showed high in vitro trans‐differentiation potential towards the β‐cell phenotype with 23 mmol/L glucose induction after 24 h. The transcription factors showed eminent expression in induced cells. The expression level of transcription factors was found significantly high in 23 mmol/L‐induced hHPCs as compared with the uninduced cells. Conclusions The present study has shown an exciting new insight into β‐cell development from hHPCs trans‐differentiation. Relative quantification of gene expression in trans‐differentiated cells offers vast possibility for the production of a maximum number of functionally active pancreatic β‐cells for a future cure of diabetes.
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Affiliation(s)
- Sandeep Kumar Vishwakarma
- Center for Liver Research and Diagnostics (CLRD) Deccan College of Medical Sciences Kanchanbagh Hyderabad Andhra Pradesh India
| | - Syed Rahamathulla
- Center for Liver Research and Diagnostics (CLRD) Deccan College of Medical Sciences Kanchanbagh Hyderabad Andhra Pradesh India
| | - Avinash Bardia
- Center for Liver Research and Diagnostics (CLRD) Deccan College of Medical Sciences Kanchanbagh Hyderabad Andhra Pradesh India
| | - Santosh K Tiwari
- Center for Liver Research and Diagnostics (CLRD) Deccan College of Medical Sciences Kanchanbagh Hyderabad Andhra Pradesh India
| | - Gunda Srinivas
- Center for Cellular and Molecular Biology (CCMB) Osmania University Hyderabad Andhra Pradesh India
| | - Avinash Raj
- Center for Cellular and Molecular Biology (CCMB) Osmania University Hyderabad Andhra Pradesh India
| | - Chaturvedula Tripura
- Center for Cellular and Molecular Biology (CCMB) Osmania University Hyderabad Andhra Pradesh India
| | - Annamaneni Sandhya
- Department of Genetics Osmania University Hyderabad Andhra Pradesh India
| | - Mohammed Aejaz Habeeb
- Center for Liver Research and Diagnostics (CLRD) Deccan College of Medical Sciences Kanchanbagh Hyderabad Andhra Pradesh India
| | - Aleem A Khan
- Center for Liver Research and Diagnostics (CLRD) Deccan College of Medical Sciences Kanchanbagh Hyderabad Andhra Pradesh India
| | - Gopal Pande
- Center for Cellular and Molecular Biology (CCMB) Osmania University Hyderabad Andhra Pradesh India
| | - K Pratap Reddy
- Department of Zoology Osmania University Hyderabad Andhra Pradesh India
| | - P Yugandhar Reddy
- Department of Zoology The Adony Arts and Science College Kurnool India
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Gioviale MC, Bellavia M, Damiano G, Lo Monte AI. Beyond islet transplantation in diabetes cell therapy: from embryonic stem cells to transdifferentiation of adult cells. Transplant Proc 2014; 45:2019-24. [PMID: 23769099 DOI: 10.1016/j.transproceed.2013.01.076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2012] [Accepted: 01/24/2013] [Indexed: 12/22/2022]
Abstract
Exogenous insulin is, at the moment, the therapy of choice of diabetes, but does not allow tight regulation of glucose leading to long-term complications. Recently, pancreatic islet transplantation to reconstitute insulin-producing β cells, has emerged as an alternative promising therapeutic approach. Unfortunately, the number of donor islets is too low compared with the high number of patients needing a transplantation leading to a search for renewable sources of high-quality β-cells. This review, summarizes more recent promising approaches to the generation of new β-cells from embryonic stem cells for transdifferentiation of adult cells, particularly a critical examination of the seminal work by Lumelsky et al.
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Affiliation(s)
- M C Gioviale
- Transplant Unit, AOUP P. Giaccone, School of Medicine, Università degli Studi di Palermo, Palermo, Italy
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24
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José A, Sobrevals L, Miguel Camacho-Sánchez J, Huch M, Andreu N, Ayuso E, Navarro P, Alemany R, Fillat C. Intraductal delivery of adenoviruses targets pancreatic tumors in transgenic Ela-myc mice and orthotopic xenografts. Oncotarget 2013; 4:94-105. [PMID: 23328228 PMCID: PMC3702210 DOI: 10.18632/oncotarget.795] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Gene-based anticancer therapies delivered by adenoviruses are limited by the poor viral distribution into the tumor. In the current work we have explored the feasibility of targeting pancreatic tumors through a loco-regional route. We have taken advantage of the ductal network in the pancreas to retrogradelly inject adenoviruses through the common bile duct in two different mouse models of pancreatic carcinogenesis: The transgenic Ela-myc mice that develop mixed neoplasms displaying both acinar-like and duct-like neoplastic cells affecting the whole pancreas; and mice bearing PANC-1 and BxPC-3 orthotopic xenografts that constitute a model of localized human neoplastic tumors. We studied tumor targeting and the anticancer effects of newly thymidine kinase-engineered adenoviruses both in vitro and in vivo, and conducted comparative studies between intraductal or intravenous administration. Our data indicate that the intraductal delivery of adenovirus efficiently targets pancreatic tumors in the two mouse models. The in vivo application of AduPARTKT plus ganciclovir (GCV) treatment induced tumor regression in Ela-myc mice. Moreover, the intraductal injection of ICOVIR15-TKT oncolytic adenoviruses significantly improved mean survival of mice bearing PANC-1 and BxPC-3 pancreatic xenografts from 30 to 52 days and from 20 to 68 days respectively (p less than 0.0001) when combined with GCV. Of notice, both AduPARTKT and ICOVIR15-TKT antitumoral responses were stronger by ductal viral application than intravenously, in line with the 38-fold increase in pancreas transduction observed upon ductal administration. In summary our data show that cytotoxic adenoviruses retrogradelly injected to the pancreas can be a feasible approach to treat localized pancreatic tumors.
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Affiliation(s)
- Anabel José
- Institut d'Investigacions Biomèdiques August Pi i Sunyer IDIBAPS, Barcelona, Spain
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25
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Abstract
Current therapies for the treatment of type 1 diabetes include daily administration of exogenous insulin and, less frequently, whole-pancreas or islet transplantation. Insulin injections often result in inaccurate insulin doses, exposing the patient to hypo- and/or hyperglycemic episodes that lead to long-term complications. Islet transplantation is also limited by lack of high-quality islet donors, early graft failure, and chronic post-transplant immunosuppressive treatment. These barriers could be circumvented by designing a safe and efficient strategy to restore insulin production within the patient's body. Porcine islets have been considered as a possible alternative source of transplantable insulin-producing cells to replace human cadaveric islets. More recently, embryonic or induced pluripotent stem cells have also been examined for their ability to differentiate in vitro into pancreatic endocrine cells. Alternatively, it may be feasible to generate new β-cells by ectopic expression of key transcription factors in endogenous non-β-cells. Finally, engineering surrogate β-cells by in vivo delivery of the insulin gene to specific tissues is also being studied as a possible therapy for type 1 diabetes. In the present review, we discuss these different approaches to restore insulin production.
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Affiliation(s)
- Eva Tudurí
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
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26
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Bone RN, Icyuz M, Zhang Y, Zhang Y, Cui W, Wang H, Peng JB, Matthews QL, Siegal GP, Wu H. Gene transfer of active Akt1 by an infectivity-enhanced adenovirus impacts β-cell survival and proliferation differentially in vitro and in vivo. Islets 2012; 4. [PMID: 23183538 PMCID: PMC3605165 DOI: 10.4161/isl.22721] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Type 1 Diabetes is characterized by an absolute insulin deficiency due to the autoimmune destruction of insulin producing β-cells in the pancreatic islets. Akt1/Protein Kinase B is the direct downstream target of PI3 Kinase activation, and has shown potent anti-apoptotic and proliferation-inducing activities. This study was designed to explore whether gene transfer of constitutively active Akt1 (CA-Akt1) would promote β-cell survival and proliferation, thus be protective against experimental diabetes. In the study, a fiber-modified infectivity-enhanced adenoviral vector, Ad5RGDpK7, was used to deliver rat insulin promoter (RIP)-driven CA-Akt1 into β-cells. Our data showed this vector efficiently delivered CA-Akt1 into freshly isolated pancreatic islets, and promoted islet cell survival and β-cell proliferation in vitro. The therapeutic effect of the vector in vivo was assessed using streptozotocin (STZ)-induced diabetes mice. Two means of vector administration were explored: intravenous and intra-bile ductal injections. While direct vector administration into pancreas via bile-ductal injection resulted in local adverse effect, intravenous injection of the vectors offered therapeutic benefits. Further analysis suggests systemic vector administration caused endogenous Akt expression and activation in islets, which may be responsible, at least in part, for the protective effect of the infectivity-enhanced CA-Akt1 gene delivery vector. Taken together, our data suggest CA-Akt1 is effective in promoting β-cell survival and proliferation in vitro, but direct in vivo use is compromised by the efficacy of transgene delivery into β-cells. Nonetheless, the vector evoked the expression and activation of endogenous Akt in the islets, thus offering beneficial bystander effect against STZ-induced diabetes.
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Affiliation(s)
- Robert N. Bone
- Department of Pathology; University of Alabama at Birmingham; Birmingham, AL USA
| | - Mert Icyuz
- Department of Medicine; University of Alabama at Birmingham; Birmingham, AL USA
| | - Yanqing Zhang
- Department of Medicine; Section of Endocrinology; Tulane University; New Orleans, LA USA
| | - Yuan Zhang
- Department of Medicine; University of Alabama at Birmingham; Birmingham, AL USA
| | - Wanxing Cui
- Department of Surgery; University of Alabama at Birmingham; Birmingham, AL USA
| | - Hongjun Wang
- Department of Surgery; Medical University of South Carolina; Charleston, SC USA
| | - Ji-Bin Peng
- Department of Medicine; University of Alabama at Birmingham; Birmingham, AL USA
| | - Qiana L. Matthews
- Department of Medicine; University of Alabama at Birmingham; Birmingham, AL USA
| | - Gene P. Siegal
- Department of Pathology; University of Alabama at Birmingham; Birmingham, AL USA
| | - Hongju Wu
- Department of Medicine; Section of Endocrinology; Tulane University; New Orleans, LA USA
- Correspondence to: Hongju Wu,
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Acinar-to-ductal metaplasia induced by adenovirus-mediated pancreatic expression of Isl1. PLoS One 2012; 7:e47536. [PMID: 23077629 PMCID: PMC3471997 DOI: 10.1371/journal.pone.0047536] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Accepted: 09/13/2012] [Indexed: 12/20/2022] Open
Abstract
Tubular complexes (TCs) are aggregates of duct-like monolayered cells in the developing and regenerating pancreas. Recent studies showed that TCs have regenerative potential, including islet neogenesis. We previously delivered adenovirus vector (AdV) into exocrine cells of the pancreas by intra-common bile ductal (ICBD) injection, and found that AdV expressing Pdx1, a pancreas-specific transcription factor, causes TC formation and islet neogenesis. We also established RTF-Pdx1-EGFP mice, which ubiquitously express Pdx1 when tetracycline is removed from the drinking water. However, exogenous Pdx1 expression in adult RTF-Pdx1-EGFP mice did not cause any pathological changes in the pancreas during three weeks of observation after tetracycline withdrawal. To examine whether the host immune response induced by AdV was involved in TC formation, we delivered AdVs expressing pancreas-related transcription factors or an irrelevant protein into the pancreas of RTF-Pdx1-EGFP mice. Histological analyses showed that both AdV injection and Pdx1 expression are required for TC formation. We also analyzed the effects of these ICBD-injected AdVs. AdV expressing Isl1, a proendocrine transcription factor, effectively induced TC formation through acinar-to-ductal metaplasia, and exogenous Pdx1 expression facilitated this process. Considering the regenerative potential of TCs, a strategy that efficiently induces TC formation may lead to novel therapies for diabetes.
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[Cell fate switch: lineage reprogramming]. YI CHUAN = HEREDITAS 2012; 34:985-92. [PMID: 22917903 DOI: 10.3724/sp.j.1005.2012.00985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
It has been demonstrated that mature cells could switch their fate by the technologies for reprogramming, such as somatic cell nuclear transfer and induced pluripotent stem cells. Recently, this conclusion was further confirmed. It was found that mature differentiated cells could be directly converted into other somatic cells or progenitors with some defined transcription factors. This technology is called lineage reprogramming, which provides an attractive novel alternative to regenerative medicine and animal biotechnology. It is a more convenient and more effective system with less ethical issues. Moreover, lineage reprogramming technology could also facilitate researches on regulation of gene expression. This review highlights the procedures of reprogramming, its characteristics, and significant promise in biomedical applications.
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Novel epitopic region of glucosyltransferase B from Streptococcus mutans. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2011; 18:1552-61. [PMID: 21795464 DOI: 10.1128/cvi.05041-11] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In the development of a component vaccine against caries, the catalytic region (CAT) and glucan-binding domain (GBD) of glucosyltransferase B (GtfB) from Streptococcus mutans have been employed as target antigens. These regions were adopted as primary targets because they theoretically include epitopes associated with enzyme function. However, their antigenicities have not been fully evaluated. Although there are many reports about successful vaccination using these components, the principle has not yet been put to practical use. For these reasons, we came to doubt the effectiveness of the epitopes in vaccine production and reevaluated the antigenic region of GtfB by using in silico analyses combined with in vitro and in vivo experiments. The results suggested that the ca. 360-amino-acid variable region (VR) in the N terminus of GtfB is more reactive than CAT and GBD. This region is S. mutans and/or GtfB specific, nonconserved among other streptococcal Gtfs, and of unknown function. Immunization using an adenovirus vector-borne DNA vaccine confirmed that VR is an epitope that shows promise for the development of a caries vaccine.
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Amemiya-Kudo M, Oka J, Takeuchi Y, Okazaki H, Yamamoto T, Yahagi N, Matsuzaka K, Okazaki S, Osuga JI, Yamada N, Murase T, Shimano H. Suppression of the pancreatic duodenal homeodomain transcription factor-1 (Pdx-1) promoter by sterol regulatory element-binding protein-1c (SREBP-1c). J Biol Chem 2011; 286:27902-14. [PMID: 21652712 DOI: 10.1074/jbc.m110.186221] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Overexpression of sterol regulatory element-binding protein-1c (SREBP-1c) in β cells causes impaired insulin secretion and β cell dysfunction associated with diminished pancreatic duodenal homeodomain transcription factor-1 (PDX-1) expression in vitro and in vivo. To identify the molecular mechanism responsible for this effect, the mouse Pdx-1 gene promoter (2.7 kb) was analyzed in β cell and non-β cell lines. Despite no apparent sterol regulatory element-binding protein-binding sites, the Pdx-1 promoter was suppressed by SREBP-1c in β cells in a dose-dependent manner. PDX-1 activated its own promoter. The E-box (-104/-99 bp) in the proximal region, occupied by ubiquitously expressed upstream stimulatory factors (USFs), was crucial for the PDX-1-positive autoregulatory loop through direct PDX-1·USF binding. This positive feedback activation was a prerequisite for SREBP-1c suppression of the promoter in non-β cells. SREBP-1c and PDX-1 directly interact through basic helix-loop-helix and homeobox domains, respectively. This robust SREBP-1c·PDX-1 complex interferes with PDX-1·USF formation and inhibits the recruitment of PDX-1 coactivators. SREBP-1c also inhibits PDX-1 binding to the previously described PDX-1-binding site (-2721/-2646 bp) in the distal enhancer region of the Pdx-1 promoter. Endogenous up-regulation of SREBP-1c in INS-1 cells through the activation of liver X receptor and retinoid X receptor by 9-cis-retinoic acid and 22-hydroxycholesterol inhibited PDX-1 mRNA and protein expression. Conversely, SREBP-1c RNAi restored Pdx-1 mRNA and protein levels. Through these multiple mechanisms, SREBP-1c, when induced in a lipotoxic state, repressed PDX-1 expression contributing to the inhibition of insulin expression and β cell dysfunction.
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Affiliation(s)
- Michiyo Amemiya-Kudo
- Okinaka Memorial Institute for Medical Research, Toranomon Hospital, Tokyo 105-8470, Japan.
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Li YG, Ji DF, Zhong S, Lv ZQ, Lin TB, Chen S, Hu GY. Hybrid of 1-deoxynojirimycin and polysaccharide from mulberry leaves treat diabetes mellitus by activating PDX-1/insulin-1 signaling pathway and regulating the expression of glucokinase, phosphoenolpyruvate carboxykinase and glucose-6-phosphatase in alloxan-induced diabetic mice. JOURNAL OF ETHNOPHARMACOLOGY 2011; 134:961-970. [PMID: 21333726 DOI: 10.1016/j.jep.2011.02.009] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2010] [Revised: 11/29/2010] [Accepted: 02/11/2011] [Indexed: 05/30/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE 1-Deoxynojirimycin (DNJ) discovered from mulberry trees has been reported to be a potent inhibitor of intestinal α-glycosidases (sucrase, maltase, glucoamylase), and many polysaccharides were useful in protecting against alloxan-induced pancreatic islets damage through their scavenging ability. This study was aimed to evaluate the therapeutic effect and potential mechanism(s) of the hybrid of DNJ and polysaccharide (HDP) from mulberry leaves on alloxan-induced diabetic mice. MATERIALS AND METHODS Daily oral treatment with HDP (150 mg/kg body weight) to diabetic mice for 12 weeks, body weight and blood glucose were determined every week, oral glucose tolerance test was performed after 4 and 8 weeks, biochemical values were measured using assay kits and gene expressions were investigated by RT-PCR. RESULTS A significant decline in blood glucose, glycosylated hemoglobin, triglyceride, aspartate transaminase and alanine transaminase levels and an evident increase in body weight, plasma insulin level and high density lipoprotein were observed in HDP treated diabetic mice. The polysaccharide (P1) showed a significant scavenging hydroxyl radicals and superoxide anion radical effects in vitro, which indicated that P1 could protect alloxan-induced pancreatic islets from damage by scavenging the free radicals and repaired the destroyed pancreatic β-cells. Pharmacokinetics assay showed that DNJ could be absorbed from the gastrointestinal mucosa and diffused rapidly into the liver, resulted in postprandial blood glucose decrease and alleviated the toxicity caused by sustained supra-physiological glucose to pancreatic β-cells. RT-PCR results indicated that HDP could modulate the hepatic glucose metabolism and gluconeogenesis by up/down-regulating the expression of rate-limiting enzymes (glucokinase, phosphoenolpyruvate carboxykinase and glucose-6-phosphatase) in liver and up-regulating the pancreatic and duodenal homeobox factor-1 (PDX-1), insulin-1 and insulin-2 expressions in pancreas. CONCLUSION These findings suggested that HDP has complimentary potency to develop an antihyperglycemic agent for treatment of diabetes mellitus.
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Affiliation(s)
- You-Gui Li
- Sericultural Research Institute, Zhejiang Academy of Agricultural Science, No. 198 Shiqiao Road, Hangzhou 310021, China
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Miyazaki S, Taniguchi H, Moritoh Y, Tashiro F, Yamamoto T, Yamato E, Ikegami H, Ozato K, Miyazaki JI. Nuclear hormone retinoid X receptor (RXR) negatively regulates the glucose-stimulated insulin secretion of pancreatic ß-cells. Diabetes 2010; 59:2854-61. [PMID: 20798333 PMCID: PMC2963544 DOI: 10.2337/db09-1897] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Retinoid X receptors (RXRs) are members of the nuclear hormone receptor superfamily and are thought to be key regulators in differentiation, cellular growth, and gene expression. Although several experiments using pancreatic β-cell lines have shown that the ligands of nuclear hormone receptors modulate insulin secretion, it is not clear whether RXRs have any role in insulin secretion. RESEARCH DESIGN AND METHODS To elucidate the function of RXRs in pancreatic β-cells, we generated a double-transgenic mouse in which a dominant-negative form of RXRβ was inducibly expressed in pancreatic β-cells using the Tet-On system. We also established a pancreatic β-cell line from an insulinoma caused by the β-cell-specific expression of simian virus 40 T antigen in the above transgenic mouse. RESULTS In the transgenic mouse, expression of the dominant-negative RXR enhanced the insulin secretion with high glucose stimulation. In the pancreatic β-cell line, the suppression of RXRs also enhanced glucose-stimulated insulin secretion at a high glucose concentration, while 9-cis-retinoic acid, an RXR agonist, repressed it. High-density oligonucleotide microarray analysis showed that expression of the dominant-negative RXR affected the expression levels of a number of genes, some of which have been implicated in the function and/or differentiation of β-cells. CONCLUSIONS These results suggest that endogenous RXR negatively regulates the glucose-stimulated insulin secretion. Given these findings, we propose that the modulation of endogenous RXR in β-cells may be a new therapeutic approach for improving impaired insulin secretion in type 2 diabetes.
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Affiliation(s)
- Satsuki Miyazaki
- Division of Stem Cell Regulation Research, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hidenori Taniguchi
- Division of Stem Cell Regulation Research, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yusuke Moritoh
- Division of Stem Cell Regulation Research, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Fumi Tashiro
- Division of Stem Cell Regulation Research, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tsunehiko Yamamoto
- Division of Stem Cell Regulation Research, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Eiji Yamato
- Division of Stem Cell Regulation Research, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hiroshi Ikegami
- Department of Endocrinology, Metabolism and Diabetes, Kinki University School of Medicine, Osaka, Japan
| | - Keiko Ozato
- Section on Molecular Genetics of Immunity, Laboratory of Molecular Growth Regulation, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland
| | - Jun-ichi Miyazaki
- Division of Stem Cell Regulation Research, Osaka University Graduate School of Medicine, Osaka, Japan
- Corresponding author: Jun-ichi Miyazaki,
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Noso S, Kataoka K, Kawabata Y, Babaya N, Hiromine Y, Yamaji K, Fujisawa T, Aramata S, Kudo T, Takahashi S, Ikegami H. Insulin transactivator MafA regulates intrathymic expression of insulin and affects susceptibility to type 1 diabetes. Diabetes 2010; 59:2579-87. [PMID: 20682694 PMCID: PMC3279543 DOI: 10.2337/db10-0476] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2010] [Accepted: 07/08/2010] [Indexed: 12/16/2022]
Abstract
OBJECTIVE Tissue-specific self-antigens are ectopically expressed within the thymus and play an important role in the induction of central tolerance. Insulin is expressed in both pancreatic islets and the thymus and is considered to be the primary antigen for type 1 diabetes. Here, we report the role of the insulin transactivator MafA in the expression of insulin in the thymus and susceptibility to type 1 diabetes. RESEARCH DESIGN AND METHODS The expression profiles of transcriptional factors (Pdx1, NeuroD, Mafa, and Aire) in pancreatic islets and the thymus were examined in nonobese diabetic (NOD) and control mice. Thymic Ins2 expression and serum autoantibodies were examined in Mafa knockout mice. Luciferase reporter assay was performed for newly identified polymorphisms of mouse Mafa and human MAFA. A case-control study was applied for human MAFA polymorphisms. RESULTS Mafa, Ins2, and Aire expression was detected in the thymus. Mafa expression was lower in NOD thymus than in the control and was correlated with Ins2 expression. Targeted disruption of MafA reduced thymic Ins2 expression and induced autoantibodies against pancreatic islets. Functional polymorphisms of MafA were newly identified in NOD mice and humans, and polymorphisms of human MAFA were associated with susceptibility to type 1 diabetes but not to autoimmune thyroid disease. CONCLUSIONS These data indicate that functional polymorphisms of MafA are associated with reduced expression of insulin in the thymus and susceptibility to type 1 diabetes in the NOD mouse as well as human type 1 diabetes.
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Affiliation(s)
- Shinsuke Noso
- Department of Endocrinology, Metabolism, and Diabetes, Kinki University School of Medicine, Osaka, Japan
| | - Kohsuke Kataoka
- Laboratory of Molecular and Developmental Biology, Graduate School of Biological Science, Nara Institute of Science and Technology, Nara, Japan
| | - Yumiko Kawabata
- Department of Endocrinology, Metabolism, and Diabetes, Kinki University School of Medicine, Osaka, Japan
| | - Naru Babaya
- Department of Endocrinology, Metabolism, and Diabetes, Kinki University School of Medicine, Osaka, Japan
| | - Yoshihisa Hiromine
- Department of Endocrinology, Metabolism, and Diabetes, Kinki University School of Medicine, Osaka, Japan
| | - Kaori Yamaji
- Department of Geriatric Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tomomi Fujisawa
- Department of Geriatric Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Shinsaku Aramata
- Laboratory of Molecular and Developmental Biology, Graduate School of Biological Science, Nara Institute of Science and Technology, Nara, Japan
| | - Takashi Kudo
- Graduate School of Comprehensive Human Sciences and Laboratory Animal Resource Center, University of Tsukuba, Tsukuba, Japan
| | - Satoru Takahashi
- Graduate School of Comprehensive Human Sciences and Laboratory Animal Resource Center, University of Tsukuba, Tsukuba, Japan
| | - Hiroshi Ikegami
- Department of Endocrinology, Metabolism, and Diabetes, Kinki University School of Medicine, Osaka, Japan
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Kordowich S, Mansouri A, Collombat P. Reprogramming into pancreatic endocrine cells based on developmental cues. Mol Cell Endocrinol 2010; 323:62-9. [PMID: 20025937 DOI: 10.1016/j.mce.2009.12.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Due to the increasing prevalence of type 1 diabetes and the complications arising from actual therapies, alternative treatments need to be established. In order to compensate the beta-cell deficiency associated with type 1 diabetes, current researches focus on new strategies to generate insulin-producing beta cells for transplantation purpose, including the differentiation of stem or progenitor cells, as well as the transdifferentiation of dispensable mature cell types. However, to successfully force any cell to adopt a functional beta-cell fate or phenotype, a better understanding of the molecular mechanisms underlying the genesis of these in vivo is required. The present short review summarizes the hitherto known functions and interplays of several key factors involved in the differentiation of the endocrine cell lineages during pancreas morphogenesis, as well as there potential in generating beta cells. Furthermore, an emphasize is made on beta-cell regeneration and the determinants implicated.
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Affiliation(s)
- Simon Kordowich
- Max-Planck Institute for Biophysical Chemistry, Department of Molecular Cell Biology, Am Fassberg, D-37077 Göttingen, Germany
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35
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Abstract
Reduction of beta cell function and a beta cell mass is observed in both type 1 and type 2 diabetes. Therefore, restoration of this deficiency might be a therapeutic option for treatment of diabetes. Islet transplantation has benefits, such as reduced incidence of hypoglycemia and achievement of insulin independence. However, the major drawback is an insufficient supply of islet donors. Transplantation of cells differentiated in vitro or in vivo regeneration of insulin-producing cells are possible approaches for beta cell/islet regenerative therapy. Embryonic and adult stem cells, pancreatic ductal progenitor cells, acinar cells, and other endocrine cells have been shown to differentiate into pancreatic beta cells. Formation of fully functional beta cells and the safety of these cells are critical issues for successful clinical application.
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Affiliation(s)
- Hee-Sook Jun
- Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Incheon, Korea
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Trophic molecules derived from human mesenchymal stem cells enhance survival, function, and angiogenesis of isolated islets after transplantation. Transplantation 2010; 89:694-701. [PMID: 20125064 DOI: 10.1097/tp.0b013e3181c7dc99] [Citation(s) in RCA: 215] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND Mesenchymal stem cells (MSCs), also known as multipotent progenitor cells, release several factors that support cell survival and enhance wound healing. We hypothesized that MSC-secreted molecules would induce a trophic effect in pancreatic islet culture conditions. METHODS Pancreatic islets were co-cultured with MSCs, and ADP/ATP ratios, glucose stimulated insulin secretion (GSIS), and DNA fragmentation were evaluated to measure islet quality and viability in vitro. The induction of signal molecules related to the control of survival, function, and angiogenesis was also analyzed. Cell quality assays, DNA fragmentation assays, and islet transplantation into streptozotocin-induced diabetic mice were performed using MSC-conditioned medium (CM)-cultured islets. Furthermore, we identified soluble molecules within MSC-CM. RESULTS Islets co-cultured with MSCs demonstrated lower ADP/ATP ratios, and higher GSIS indexes and viability. Furthermore, co-cultured islets revealed higher levels of anti-apoptotic signal molecules (X-linked inhibitor of apoptosis protein, Bcl-xL, Bcl-2, and heat shock protein-32) and demonstrated increased vascular endothelial growth factor receptor 2 and Tie-2 mRNA expression and increased levels of phosphorylated Tie-2 and focal adhesion kinase protein. Islets cultured in MSC-CM demonstrated lower ADP/ATP ratios, less apoptosis, and a higher GSIS indexes. Diabetic mice that received islet transplants (200 islet equivalent) cultured in MSC-CM for 48 hr demonstrated significantly lower blood glucose levels and enhanced blood vessel formation. In addition, interleukin-6, interleukin-8, vascular endothelial growth factor-A, hepatocyte growth factor, and transforming growth factor-beta were detected at significant levels in MSC-CM. CONCLUSIONS These results suggest that the trophic factors secreted by human MSCs enhance islet survival and function after transplantation.
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Kordowich S, Mansouri A, Collombat P. Reprogramming into pancreatic endocrine cells based on developmental cues. Mol Cell Endocrinol 2010; 315:11-8. [PMID: 19897012 PMCID: PMC2814956 DOI: 10.1016/j.mce.2009.10.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2009] [Revised: 09/14/2009] [Accepted: 10/24/2009] [Indexed: 01/30/2023]
Abstract
Due to the increasing prevalence of type 1 diabetes and the complications arising from actual therapies, alternative treatments need to be established. In order to compensate the beta-cell deficiency associated with type 1 diabetes, current research focuses on new strategies to generate insulin-producing beta-cells for transplantation purpose, including the differentiation of stem or progenitor cells, as well as the transdifferentiation of dispensable mature cell types. However, to successfully force specific cells to adopt a functional beta-cell fate or phenotype, a better understanding of the molecular mechanisms underlying beta-cell genesis is required. The present short review summarizes the hitherto known functions and interplays of several key factors involved in the development of the different endocrine cell lineages during pancreas morphogenesis, as well as their potential to direct the generation of beta-cells. Furthermore, an emphasis is made on beta-cell regeneration and the determinants implicated.
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Affiliation(s)
- Simon Kordowich
- Max-Planck Institute for Biophysical Chemistry, Department of Molecular Cell Biology, Am Fassberg, D-37077 Göttingen, Germany
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38
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In Vivo Regeneration of Insulin-Producing β-Cells. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2010; 654:627-40. [DOI: 10.1007/978-90-481-3271-3_27] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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39
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Antidiabetic effect of orally administered conophylline-containing plant extract on streptozotocin-treated and Goto-Kakizaki rats. Biomed Pharmacother 2009; 63:710-6. [DOI: 10.1016/j.biopha.2009.01.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2008] [Accepted: 01/13/2009] [Indexed: 01/07/2023] Open
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40
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Kaneto H, Matsuoka TA, Kawashima S, Yamamoto K, Kato K, Miyatsuka T, Katakami N, Matsuhisa M. Role of MafA in pancreatic beta-cells. Adv Drug Deliv Rev 2009; 61:489-96. [PMID: 19393272 DOI: 10.1016/j.addr.2008.12.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2008] [Accepted: 12/15/2008] [Indexed: 01/01/2023]
Abstract
Pancreatic beta-cell-specific insulin gene expression is regulated by a variety of pancreatic transcription factors and the conserved A3, C1 and E1 elements in the insulin gene enhancer region are very important for activation of insulin gene. Indeed, PDX-1 binding to the A3 element and NeuroD binding to the E1 element are crucial for insulin gene transcription. Recently, C1 element-binding transcription factor was identified as MafA, which is a basic-leucine zipper transcription factor and functions as a potent transactivator for the insulin gene. Under diabetic conditions, chronic hyperglycemia gradually deteriorates pancreatic beta-cell function, which is accompanied by decreased expression and/or DNA binding activities of MafA and PDX-1. Furthermore, MafA overexpression, together with PDX-1 and NeuroD, markedly induces insulin biosynthesis in various non-beta-cells and thereby is a useful tool to efficiently induce insulin-producing surrogate beta-cells. These results suggest that MafA plays a crucial role in pancreatic beta-cells and could be a novel therapeutic target for diabetes.
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41
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Olson DE, Thulé PM. Gene transfer to induce insulin production for the treatment of diabetes mellitus. Expert Opin Drug Deliv 2008; 5:967-77. [DOI: 10.1517/17425247.5.9.967] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Darin E Olson
- Assistant Professor of Internal Medicine Emory University School of Medicine, Atlanta VA Medical Center, Division of Endocrinology, Lipids & Metabolism, USA
| | - Peter M Thulé
- Associate Professor of Internal Medicine Emory University School of Medicine, Atlanta VA Medical Center, Division of Endocrinology, Lipids & Metabolism, USA ;
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42
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Efficient transformation of small hepatocytes into insulin-expressing cells by forced expression of Pdx1. ACTA ACUST UNITED AC 2008; 15:403-9. [DOI: 10.1007/s00534-007-1318-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2007] [Accepted: 09/21/2007] [Indexed: 01/30/2023]
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Abstract
OBJECTIVES The purpose of this study was to investigate whether pancreatic and duodenal homeobox factor 1 (PDX-1) could serve as a potential molecular target for the treatment of pancreatic cancer. METHODS Cell proliferation, invasion capacity, and protein levels of cell cycle mediators were determined in human pancreatic cancer cells transfected with mouse PDX-1 (mPDX-1) alone or with mPDX-1 short hairpin RNA (shRNA) and/or human PDX-1 shRNA (huPDX-1 shRNA). Tumor cell growth and apoptosis were also evaluated in vivo in PANC-1 tumor-bearing severe combined immunodeficient mice receiving multiple treatments of intravenous liposomal huPDX-1 shRNA. RESULTS mPDX-1 overexpression resulted in the significant increase of cell proliferation and invasion in MIA PaCa2, but not PANC-1 cells. This effect was blocked by knocking down mPDX-1 expression with mPDX-1 shRNA. Silencing of huPDX-1 expression in PANC-1 cells inhibited cell proliferation in vitro and suppressed tumor growth in vivo which was associated with increased tumor cell apoptosis. PDX-1 overexpression resulted in dysregulation of the cell cycle with up-regulation of cyclin D, cyclin E, and Cdk2 and down-regulation of p27. CONCLUSIONS PDX-1 regulates cell proliferation and invasion in human pancreatic cancer cells. Down-regulation of PDX-1 expression inhibits pancreatic cancer cell growth in vitro and in vivo, implying its use as a potential therapeutic target for the treatment of pancreatic cancer.
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44
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In vitro transformation of adult rat hepatic progenitor cells into pancreatic endocrine hormone-producing cells. ACTA ACUST UNITED AC 2008; 15:310-7. [DOI: 10.1007/s00534-007-1252-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2007] [Accepted: 07/06/2007] [Indexed: 10/22/2022]
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Abstract
OBJECTIVES Viral vector uptake into the pancreas is rare. The few viral vectors reported to transduce in vivo pancreatic islets after systemic injection required additional physical measures, such as direct pancreatic injection or hepatic vessel clamping. Because pancreatic islet uptake of the human polyomavirus family member BK virus was previously reported in hamsters after systemic administration, we hypothesized that SV40, a polyomavirus member remarkably similar to BK virus, may also infect the pancreas. METHODS We injected intravenously a low dose of SV40, unaided by any other physical or chemical means, and evaluated viral uptake by pancreatic islets and pancreatic exocrine tissue via polymerase chain reaction, Western blot, electron microscopy, immunofluorescent microscopy, and protein A-gold immunocytochemistry. RESULTS Pancreatic uptake of SV40 was comparable to other major organs (ie, liver and spleen). SV40 viral particles were detected in both pancreatic islets and acini. In pancreatic islets, all islet cell types were infected by SV40, albeit the infection rate of glucagon-producing alpha cells surpassed beta- and delta-islet cells. Low-dose SV40 administration was not sufficient to induce heterologous gene expression in the pancreas. CONCLUSIONS Our study shows that pancreatic islet and acinar cell uptake of SV40 is feasible with a single, low-dose intravenous injection. However, this dose did not result in gene delivery into the murine pancreas.
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Kaneto H, Miyatsuka T, Kawamori D, Yamamoto K, Kato K, Shiraiwa T, Katakami N, Yamasaki Y, Matsuhisa M, Matsuoka TA. PDX-1 and MafA play a crucial role in pancreatic beta-cell differentiation and maintenance of mature beta-cell function. Endocr J 2008; 55:235-52. [PMID: 17938503 DOI: 10.1507/endocrj.k07e-041] [Citation(s) in RCA: 117] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Pancreatic and duodenal homeobox factor-1 (PDX-1) plays a crucial role in pancreas development, beta-cell differentiation, and maintenance of mature beta-cell function. PDX-1 expression is maintained in pancreatic precursor cells during pancreas development but becomes restricted to beta-cells in mature pancreas. In mature beta-cells, PDX-1 transactivates the insulin and other genes involved in glucose sensing and metabolism such as GLUT2 and glucokinase. MafA is a recently isolated beta-cell-specific transcription factor which functions as a potent activator of insulin gene transcription. Furthermore, these transcription factors play an important role in induction of insulin-producing cells in various non-beta-cells and thus could be therapeutic targets for diabetes. On the other hand, under diabetic conditions, expression and/or activities of PDX-1 and MafA in beta-cells are reduced, which leads to suppression of insulin biosynthesis and secretion. It is likely that alteration of such transcription factors explains, at least in part, the molecular mechanism for beta-cell glucose toxicity found in diabetes.
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Affiliation(s)
- Hideaki Kaneto
- Department of Internal Medicine and Therapeutics (A8), Osaka University Graduate School of Medicine, Osaka, Japan
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Xu X, D'Hoker J, Stangé G, Bonné S, De Leu N, Xiao X, Van de Casteele M, Mellitzer G, Ling Z, Pipeleers D, Bouwens L, Scharfmann R, Gradwohl G, Heimberg H. Beta cells can be generated from endogenous progenitors in injured adult mouse pancreas. Cell 2008; 132:197-207. [PMID: 18243096 DOI: 10.1016/j.cell.2007.12.015] [Citation(s) in RCA: 731] [Impact Index Per Article: 45.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2007] [Revised: 09/25/2007] [Accepted: 12/10/2007] [Indexed: 12/13/2022]
Abstract
Novel strategies in diabetes therapy would obviously benefit from the use of beta (beta) cell stem/progenitor cells. However, whether or not adult beta cell progenitors exist is one of the most controversial issues in today's diabetes research. Guided by the expression of Neurogenin 3 (Ngn3), the earliest islet cell-specific transcription factor in embryonic development, we show that beta cell progenitors can be activated in injured adult mouse pancreas and are located in the ductal lining. Differentiation of the adult progenitors is Ngn3 dependent and gives rise to all islet cell types, including glucose responsive beta cells that subsequently proliferate, both in situ and when cultured in embryonic pancreas explants. Multipotent progenitor cells thus exist in the pancreas of adult mice and can be activated cell autonomously to increase the functional beta cell mass by differentiation and proliferation rather than by self-duplication of pre-existing beta cells only.
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Affiliation(s)
- Xiaobo Xu
- Diabetes Research Center, Vrije Universiteit Brussel, Laarbeeklaan 103, B1090 Brussels, Belgium
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Activation of phosphatidylinositol-3 kinase regulates pancreatic duodenal homeobox-1 in duct cells during pancreatic regeneration. Pancreas 2008; 36:153-9. [PMID: 18376306 PMCID: PMC2613907 DOI: 10.1097/mpa.0b013e318157753e] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
OBJECTIVE The purpose of our study was to determine whether the phosphatidylinositol 3-kinase (PI3K)/Akt pathway contributes to expression of pancreatic duodenal homeobox-1 (PDX-1) in duct cells and the cell differentiation during pancreatic regeneration. METHODS The role of PI3K in PDX-1 expression and duct cell differentiation with pancreatic regeneration in mice after partial pancreatectomy (Px) was examined using either wortmannin, a pharmacological PI3K inhibitor, or small-interfering RNA directed to the p85alpha regulatory subunit of PI3K. Akt phosphorylation, a marker of PI3K activation, and PDX-1 expression were assessed by Western blot analysis and immunohistochemistry. RESULTS Both PDX-1 levels and Akt phosphorylation were concomitantly increased in pancreatic ducts after partial Px and, conversely, blocked by treatment with wortmannin or p85alpha small-interfering RNA. Pancreatic duct cell differentiation, as assessed by appearance of insulin-positive cells 3 days after partial Px, was effectively reduced by wortmannin. CONCLUSIONS The PI3K/Akt activation plays a critical role for both PDX-1 expression and pancreatic duct cell differentiation into insulin-producing cells during pancreatic regeneration.
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Abstract
It is well known that pancreatic and duodenal homeobox factor-1 (PDX-1) plays a pleiotropic role in the pancreas. In the developing pancreas, PDX-1 is involved in both pancreas formation and beta-cell differentiation. In mature beta-cells, PDX-1 transactivates insulin and other beta-cell-related genes such as GLUT2 and glucokinase. Furthermore, PDX-1 plays an important role in the induction of insulin-producing cells in various non-beta-cells and is thereby a possible therapeutic target for diabetes. On the other hand, under diabetic conditions, expression and/or activity of PDX-1 in beta-cells is reduced, which leads to suppression of insulin biosynthesis and secretion. It is likely that PDX-1 inactivation explains, at least in part, the molecular mechanism for beta-cell glucose toxicity found in diabetes.
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Affiliation(s)
- Hideaki Kaneto
- Department of Internal Medicine and Therapeutics (A8), Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
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50
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YAMAZAKI T, YOSHIDA H, HONMA T, IKEGAMI A, NIIKAWA J, TANAKA S, AWAI T, YUKAWA A, KITAMURA K, HANAWA K, IMAMURA T, IMAWARI M. Regeneration after Two Types of Rat Acute Pancreatitis Compared with Human Autoimmune Pancreatitis. THE SHOWA UNIVERSITY JOURNAL OF MEDICAL SCIENCES 2008. [DOI: 10.15369/sujms1989.20.161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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