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Improved cryopreservation yield of pancreatic islets using combination of lower dose permeable cryoprotective agents. Cryobiology 2019; 88:23-28. [PMID: 30991035 DOI: 10.1016/j.cryobiol.2019.04.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 04/10/2019] [Accepted: 04/11/2019] [Indexed: 11/23/2022]
Abstract
Islet transplantation has been shown to restore normoglycemia in animal models and for type 1 diabetic patients in clinical trials. One method of storing islets intended for transplantation is via cryobanking at very low temperatures (-196 °C). Cryobanking islets without the use of cryoprotecting agents (CPAs) contributes to cellular shear stress and cell death. Although current CPA protocols vary, high concentrations of these agents are toxic to islets cells. This study tested the effects of the permeating CPA dimethyl sulfoxide (Me2SO) with the addition of ethylene glycol (EG), both at reduced concentrations, on rat and human islet cell yield, viability, and glucose stimulated insulin release (GSIR). To test this, islets were treated using three combinations of CPAs (2M ME2SO, 1M ME2SO + 1M EG, and 1M ME2SO + 0.5M EG). Next, fresh islets, 2M ME2SO islets, and 1M ME2SO + 0.5M EG isolated rat islets were transplanted into streptozotocin-induced (STZ) diabetic mice. Our data showed that cryopreservation with a reduced concentration of ME2SO (1M ME2SO + multimolar EG) achieved a higher percent yield and viability when compared to the current standard 2M ME2SO treatment for both rat and human islets. Furthermore, STZ-induced diabetic mice achieved normoglycemia after transplantation with 1000 islet equivalents (IE), an average 12 days sooner, with islets cryopreserved with reduced-concentration (ME2SO + 0.5M EG), compared to islets preserved with 2M ME2SO. In conclusion, reduced concentration of penetrating CPAs during islet cryopreservation increases islet yield and viability in vitro and reduces delay before normoglycemia in diabetic mice.
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Eulálio JMR, Bon-Habib ACC, Soares DDO, Corrêa PGA, Pineschi GPF, Diniz VS, Manso JEF, Schanaider A. Critical analysis and systematization of rat pancreatectomy terminology. Acta Cir Bras 2017; 31:698-704. [PMID: 27828605 DOI: 10.1590/s0102-865020160100000010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 09/16/2016] [Indexed: 11/22/2022] Open
Abstract
PURPOSE: To critically analyze and standardize the rat pancreatectomy nomenclature variants. METHODS: It was performed a review of indexed manuscripts in PUBMED from 01/01/1945 to 31/12/2015 with the combined keywords "rat pancreatectomy" and "rat pancreas resection". The following parameters was considered: A. Frequency of publications; B. Purpose of the pancreatectomy in each article; C. Bibliographic references; D. Nomenclature of techniques according to the pancreatic parenchyma resection percentage. RESULTS: Among the 468, the main objectives were to surgically induce diabetes and to study the genes regulations and expressions. Five rat pancreatectomy technique references received 15 or more citations. Twenty different terminologies were identified for the pancreas resection: according to the resected parenchyma percentage (30 to 95%); to the procedure type (total, subtotal and partial); or based on the selected anatomical region (distal, longitudinal and segmental). A nomenclature systematization was gathered by cross-checking information between the main surgical techniques, the anatomic parameters descriptions and the resected parenchyma percentages. CONCLUSION: The subtotal pancreatectomy nomenclature for parenchymal resection between 80 and 95% establishes a surgical parameter that also defines the total and partial pancreatectomy limits and standardizes these surgical procedures in rats.
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Affiliation(s)
- José Marcus Raso Eulálio
- PhD, Assistant Professor, Head of Division, Department of Surgery, School of Medicine, Universidade Federal do Rio de Janeiro (UFRJ), Brazil. Conception and design of the study, interpretation of data, manuscript preparation and writing
| | - Assad Charbel Chequer Bon-Habib
- Graduate student, Scientific Initiation, Department of Surgery, School of Medicine, UFRJ, Rio de Janeiro-RJ, Brail. Acquisition, analysis and interpretation of data
| | - Daiane de Oliveira Soares
- Graduate student, Scientific Initiation, Department of Surgery, School of Medicine, UFRJ, Rio de Janeiro-RJ, Brail. Acquisition, analysis and interpretation of data
| | - Paulo Guilherme Antunes Corrêa
- Graduate student, Scientific Initiation, Department of Surgery, School of Medicine, UFRJ, Rio de Janeiro-RJ, Brail. Acquisition, analysis and interpretation of data
| | - Giovana Penna Firme Pineschi
- Graduate student, Scientific Initiation, Department of Surgery, School of Medicine, UFRJ, Rio de Janeiro-RJ, Brail. Acquisition, analysis and interpretation of data
| | - Victor Senna Diniz
- Graduate student, Scientific Initiation, Department of Surgery, School of Medicine, UFRJ, Rio de Janeiro-RJ, Brail. Acquisition, analysis and interpretation of data
| | - José Eduardo Ferreira Manso
- PhD, Associate Professor, Head, Department of Surgery, Postgraduate Program in Surgical Sciences, School of Medicine, UFRJ, Rio de Janeiro-RJ, Brazil. Acquisition and interpretation of data
| | - Alberto Schanaider
- PhD, Full Professor, Head, Center of Experimental Surgical. Coordinator, Postgraduate Program in Surgical Sciences, Department of Surgery, School of Medicine, UFRJ, Rio de Janeiro-RJ, Brazil. Manuscript writing, critical revision
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Iuamoto LR, Franco AS, Suguita FY, Essu FF, Oliveira LT, Kato JM, Torsani MB, Meyer A, Andraus W, Chaib E, D'Albuquerque LAC. Human islet xenotransplantation in rodents: A literature review of experimental model trends. Clinics (Sao Paulo) 2017; 72:238-243. [PMID: 28492724 PMCID: PMC5401612 DOI: 10.6061/clinics/2017(04)08] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 12/16/2016] [Indexed: 01/19/2023] Open
Abstract
Among the innovations for the treatment of type 1 diabetes, islet transplantation is a less invasive method of treatment, although it is still in development. One of the greatest barriers to this technique is the low number of pancreas donors and the low number of pancreases that are available for transplantation. Rodent models have been chosen in most studies of islet rejection and type 1 diabetes prevention to evaluate the quality and function of isolated human islets and to identify alternative solutions to the problem of islet scarcity. The purpose of this study is to conduct a review of islet xenotransplantation experiments from humans to rodents, to organize and analyze the parameters of these experiments, to describe trends in experimental modeling and to assess the viability of this procedure. In this study, we reviewed recently published research regarding islet xenotransplantation from humans to rodents, and we summarized the findings and organized the relevant data. The included studies were recent reports that involved xenotransplantation using human islets in a rodent model. We excluded the studies that related to isotransplantation, autotransplantation and allotransplantation. A total of 34 studies that related to xenotransplantation were selected for review based on their relevance and current data. Advances in the use of different graft sites may overcome autoimmunity and rejection after transplantation, which may solve the problem of the scarcity of islet donors in patients with type 1 diabetes.
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Affiliation(s)
- Leandro Ryuchi Iuamoto
- Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
- *Corresponding author. E-mail:
| | | | | | | | | | | | | | - Alberto Meyer
- Departamento de Gastroenterologia, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Wellington Andraus
- Departamento de Gastroenterologia, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Eleazar Chaib
- Departamento de Gastroenterologia, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
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Dietrich I, Crescenzi A, Chaib E, D'Albuquerque LAC. Trophic effects of adipose derived stem cells on Langerhans islets viability--Review. Transplant Rev (Orlando) 2015; 29:121-6. [PMID: 26002997 DOI: 10.1016/j.trre.2015.04.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 04/14/2015] [Accepted: 04/30/2015] [Indexed: 12/18/2022]
Abstract
Langerhans islets transplantation has been proposed to provide an endogenous source of insulin in Type I diabetes. However, the hypoxic stress and the receptor's immune reaction suffered by the implants cause them to fail in sustaining the insulin production along the time. Experimental studies have shown that adipose derived stem cells (ADSCs) can secrete cytokines that activate free radical scavengers, antioxidants and chaperone heat/shock proteins leading to reduction of apoptosis in damaged tissues. Therefore, using the PubMed database, we reviewed the experimental studies that investigated the trophic effects of ADSCs on Langerhans islets viability, in vitro and in vivo, from 2009 to 2014. We excluded articles that investigated the effects of other types of mesenchymal stem cells on β-cell survival as well articles that worked in the differentiation of ADSCs into insulin producing cells. The analysis of the experiments revealed that exposure of islets to ADSCs in vitro, even for a short period of time, can enhance islet cell viability and function. In vivo studies also corroborated the trophic effects of ADSCs leading to the improvement of islet function and reduction of the number of the islets required for controlling the receptor's glucose levels. This review can contribute to guide future experiments looking for a long term diabetes treatment employing ADSC trophic effects for the enhancement of transplanted Langerhans islet viability and functioning.
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Affiliation(s)
- Isa Dietrich
- Department of Gastroenterology, Liver and Pancreas Transplantation-Surgery Unit, São Paulo University Medical School, São Paulo 05403090 Brazil.
| | - Alessandra Crescenzi
- Department of Gastroenterology, Liver and Pancreas Transplantation-Surgery Unit, São Paulo University Medical School, São Paulo 05403090 Brazil
| | - Elezar Chaib
- Department of Gastroenterology, Liver and Pancreas Transplantation-Surgery Unit, São Paulo University Medical School, São Paulo 05403090 Brazil
| | - Luiz Augusto Carneiro D'Albuquerque
- Department of Gastroenterology, Liver and Pancreas Transplantation-Surgery Unit, São Paulo University Medical School, São Paulo 05403090 Brazil
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