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Chanet B, Schnell NK, Guintard C, Chen WJ. Anatomy of the endocrine pancreas in actinopterygian fishes and its phylogenetic implications. Sci Rep 2023; 13:22501. [PMID: 38110445 PMCID: PMC10728084 DOI: 10.1038/s41598-023-49404-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 12/07/2023] [Indexed: 12/20/2023] Open
Abstract
The anatomy and organisation of the endocrine pancreas in ray-finned fishes vary widely. The two main morphoanatomical character states are diffuse versus compact pancreatic tissue. The latter are called Brockmann Bodies (BBs), or principal islets. The present study is the first comprehensive survey on the anatomy of the endocrine pancreas (diffuse versus compact) across 322 actinopterygian species in 39 orders and 135 families based on literature, specimen dissections, and Magnetic Resonance Imaging (MRI). The data obtained show that large endocrine pancreatic islets (BB) have appeared several times in teleost evolution: in some ostariophysian clades and within the Salmoniformes and Neoteleostei. Acanthomorpha (spiny-rayed fishes) is the largest clade of the Neoteleostei. Within this clade, an absence of BBs is only observed in flying fishes (Exocoetidae), parrotfishes (Scarinae), and some of the scarine relatives, the Labridae. The presence of BBs in examined jellynose fish species from the Ateleopodiformes indicates support for its sister-group relationship to the Ctenosquamata (Myctophiformes + Acanthomorpha). More investigations are still needed to corroborate the presence or absence of BBs as a putative synapomorphy for a clade comprising Ateleopodiformes and Ctenosquamata.
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Affiliation(s)
- Bruno Chanet
- Département Origines Et Évolution, Institut de Systématique, Evolution, Biodiversité (ISYEB) (UMR 7205 MNHN-CNRS-Sorbonne Université-EPHE), Muséum National d'Histoire Naturelle, CP 30, 57 Rue Cuvier, 75005, Paris, France
| | - Nalani K Schnell
- Institut Systématique Evolution Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Station Marine de Concarneau, Place de La Croix, 29900, Concarneau, France.
| | - Claude Guintard
- Laboratoire d'Anatomie Comparée, ONIRIS - Ecole Nationale Vétérinaire de l'Agroalimentaire et de l'Alimentation, Nantes Atlantique, Route de Gachet, CS 40 706, 44307, Nantes Cedex 03, France
| | - Wei-Jen Chen
- Institute of Oceanography, National Taiwan University, No.1 Sec. 4, Roosevelt Road, Taipei, 10617, Taiwan.
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2
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Silveira T, Moreno Abril SI, Lucas CG, Remião MH. Editorial: Application of fishes as biological models in genetic studies. Front Genet 2023; 13:1092160. [PMID: 36685980 PMCID: PMC9849242 DOI: 10.3389/fgene.2022.1092160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 11/28/2022] [Indexed: 01/06/2023] Open
Affiliation(s)
- Tony Silveira
- Biological Sciences Institute, Federal University of Rio Grande, Rio Grande, Brazil,*Correspondence: Tony Silveira, ; Mariana Härter Remião,
| | - Sandra Isabel Moreno Abril
- Marine Research Centre, University of Vigo, Vigo, Spain,Department of Ecology and Animal Biology, University of Vigo, Vigo, Spain
| | - Caroline Gomes Lucas
- Division of Animal Sciences, Animal Science Research Center, National Swine Resource and Research Center, University of Missouri, Columbia, MO, United States
| | - Mariana Härter Remião
- Structural Genomics Laboratory, Technological Developmental Center, Federal University of Pelotas, Pelotas, Brazil,*Correspondence: Tony Silveira, ; Mariana Härter Remião,
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Zhang X, Chen H, Li Y, Tang N, Chen D, Li Z. The insulin gene as an energy homeostasis biomarker in Yangtze sturgeon (Acipenser dabryanus). FISH PHYSIOLOGY AND BIOCHEMISTRY 2022; 48:693-705. [PMID: 35501527 DOI: 10.1007/s10695-022-01079-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 04/18/2022] [Indexed: 06/14/2023]
Abstract
Insulin plays an important role in maintaining energy homeostasis and has the potential to be an indicator of energy homeostasis in the Yangtze sturgeon, Acipenser dabryanus. In this study, the Yangtze sturgeon insulin (Adinsulin) was cloned and characterized. To evaluate the possibility of insulin as an energy state assessment indicator, quantification real-time PCR (qRT-PCR) was used to evaluate expression changes in different tissues (the whole brain, esophagus, cardiac stomach, pyloric stomach, pyloric caeca, duodenum, valvula intestine, rectum, liver, pancreas, spleen, kidney, heart, muscle, gill and eye) from 6 fish (average weight 325.7 ± 22.3 g) and in three experiments including postprandial, fasting and re-feeding, and glucose tolerance treatment in which fish were divided into two groups including a group that administered a glucose solution (1 ul/g body weight) and another group that administered sterile water as control. In these three experiments, 6 fish were sampled, respectively, then been used to evaluate expression changes of insulin. All fish in feeding groups were fed in tanks (60.0 cm × 50.0 cm × 40.0 cm) with a commercial diet (crude protein ≥ 40%, crude fat ≥ 12%, coarse fiber ≤ 6%, crude ash ≤ 18%; TONGWEI CO., LTD, China) once a day at 16:00. The result showed that Adinsulin was highly expressed in the pancreas, which was the basis for the next experiment to use the pancreas as the test target. Adinsulin expression significantly increased 1 h after feeding and decreased rapidly after 3 h of feeding, but it was still significantly higher than that of the group without feeding (P < 0.01). Compared to the feeding group, the expression of Adinsulin was significantly reduced in the fasting group of 3 days (P < 0.01), 6 days (P < 0.01), 10 days (P < 0.05), 11 days (P < 0.05) and 13 days (P < 0.01) and was no significant difference in re-feeding for 1st day, 2nd day and 4th day, but there was difference between re-feeding group and fasting group. After glucose tolerance treatment, serum glucose levels increased significantly (P < 0.05), accompanied by a significant increase (P < 0.001) in insulin expression. This study result shows that insulin has the capacity to measure the energy homeostasis of Yangtze sturgeon. Further development of detection methods for sturgeon plasma or serum insulin will avoid slaughtering animals and is more practical in energy homeostasis assessment.
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Affiliation(s)
- Xin Zhang
- College of Animal Science and Technology, Sichuan Agricultural University, 211# Huimin Road, Chengdu, 611130, China
| | - Hu Chen
- College of Animal Science and Technology, Sichuan Agricultural University, 211# Huimin Road, Chengdu, 611130, China.
- Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Hainan Aquaculture Breeding Engineering Research Center, College of Marine Sciences, Hainan University, Hainan 5, Haikou, China.
| | - Ya Li
- College of Animal Science and Technology, Sichuan Agricultural University, 211# Huimin Road, Chengdu, 611130, China
| | - Ni Tang
- College of Animal Science and Technology, Sichuan Agricultural University, 211# Huimin Road, Chengdu, 611130, China
| | - Defang Chen
- College of Animal Science and Technology, Sichuan Agricultural University, 211# Huimin Road, Chengdu, 611130, China
| | - Zhiqiong Li
- College of Animal Science and Technology, Sichuan Agricultural University, 211# Huimin Road, Chengdu, 611130, China.
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Vegrichtova M, Hajkova M, Porubska B, Vasek D, Krylov V, Tlapakova T, Krulova M. Xenogeneic Sertoli cells modulate immune response in an evolutionary distant mouse model through the production of interleukin-10 and PD-1 ligands expression. Xenotransplantation 2022; 29:e12742. [PMID: 35297099 DOI: 10.1111/xen.12742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/27/2021] [Accepted: 03/02/2022] [Indexed: 12/26/2022]
Abstract
BACKGROUND Immunomodulatory mechanisms of Sertoli cells (SCs) during phylogeny have not been described previously. This study attempted to reveal mechanisms of SC immune modulation in an evolutionary distant host. METHODS The interaction of the SC cell line derived from Xenopus tropicalis (XtSC) with murine immune cells was studied in vivo and in vitro. The changes in the cytokine production, the intracellular and surface molecules expression on murine immune cells were evaluated after co-culturing with XtSCs. Migration of XtSCs in mouse recipients after intravenous application and subsequent changes in spleen and the testicular immune environment were determined by flow cytometry. RESULTS The in vitro co-culture model was established, allowing the study of XtSCs interaction with murine immune cells. Intracellular staining of interleukin (IL-)10 revealed a significant increase in its expression in macrophages and B cells co-cultured with XtSCs, compared to both unstimulated cells and xenogeneic control. On the contrary, a significant decrease in Th lymphocytes expressing interferon-gamma was observed. The expression of both PD-1 ligands (PD-L1 and PD-L2) was upregulated on the macrophage surfaces after co-culture with XtSCs, but not with the controls. XtSCs migrated specifically to testes when administered intravenously and modulated systemic and local testicular microenvironment; this was detected by the expression of molecules associated with suppressive phenotype by CD45+ cells in both spleen and testes. CONCLUSION We have demonstrated for the first time that SCs can migrate and modulate immune response in a phylogenetically distant host. It was further observed that SCs induce expression of molecules associated with immunosuppression, such as IL-10 and PD-1 ligands.
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Affiliation(s)
- Marketa Vegrichtova
- Department of Cell Biology, Faculty of Science, Charles University, Prague 2, Czech Republic
| | - Michaela Hajkova
- Department of Cell Biology, Faculty of Science, Charles University, Prague 2, Czech Republic.,Department of Nanotoxicology and Molecular Epidemiology, Institute of Experimental Medicine of the Czech Academy of Sciences, Prague 4, Czech Republic
| | - Bianka Porubska
- Department of Cell Biology, Faculty of Science, Charles University, Prague 2, Czech Republic.,Department of Nanotoxicology and Molecular Epidemiology, Institute of Experimental Medicine of the Czech Academy of Sciences, Prague 4, Czech Republic
| | - Daniel Vasek
- Department of Cell Biology, Faculty of Science, Charles University, Prague 2, Czech Republic
| | - Vladimir Krylov
- Department of Cell Biology, Faculty of Science, Charles University, Prague 2, Czech Republic
| | - Tereza Tlapakova
- Department of Cell Biology, Faculty of Science, Charles University, Prague 2, Czech Republic
| | - Magdalena Krulova
- Department of Cell Biology, Faculty of Science, Charles University, Prague 2, Czech Republic.,Department of Nanotoxicology and Molecular Epidemiology, Institute of Experimental Medicine of the Czech Academy of Sciences, Prague 4, Czech Republic
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Conlon JM, O'Harte FPM, Flatt PR. Dual-agonist incretin peptides from fish with potential for obesity-related Type 2 diabetes therapy - A review. Peptides 2022; 147:170706. [PMID: 34861327 DOI: 10.1016/j.peptides.2021.170706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/28/2021] [Accepted: 11/29/2021] [Indexed: 12/25/2022]
Abstract
The long-acting glucagon-like peptide-1 receptor (GLP1R) agonist, semaglutide and the unimolecular glucose-dependent insulinotropic polypeptide receptor (GIPR)/GLP1R dual-agonist, tirzepatide have been successfully introduced as therapeutic options for patients with Type-2 diabetes (T2DM) and obesity. Proglucagon-derived peptides from phylogenetically ancient fish act as naturally occurring dual agonists at the GLP1R and the glucagon receptor (GCGR) with lamprey GLP-1 and paddlefish glucagon being the most potent and effective in stimulating insulin release from BRIN-BD11 clonal β-cells. These peptides were also the most effective in lowering blood glucose and elevating plasma insulin concentrations when administered intraperitoneally to overnight-fasted mice together with a glucose load. Zebrafish GIP acts as a dual agonist at the GIPR and GLP1R receptors. Studies with the high fat-fed mouse, an animal model with obesity, impaired glucose-tolerance and insulin-resistance, have shown that twice-daily administration of the long-acting analogs [D-Ala2]palmitoyl-lamprey GLP-1 and [D-Ser2]palmitoyl-paddlefish glucagon over 21 days improves glucose tolerance and insulin sensitivity. This was associated with β-cell proliferation, protection of β-cells against apoptosis, decreased pancreatic glucagon content, improved lipid profile, reduced food intake and selective alteration in the expression of genes involved in β-cell stimulus-secretion coupling. In insulin-deficient GluCreERT2;ROSA26-eYFP transgenic mice, the peptides promoted an increase in β-cell mass with positive effects on transdifferentiation of glucagon-producing to insulin-producing cells. Naturally occurring fish dual agonist peptides, particularly lamprey GLP-1 and paddlefish glucagon, provide templates for development into therapeutic agents for obesity-related T2DM.
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Affiliation(s)
- J Michael Conlon
- Diabetes Research Group, School of Biomedical Sciences, Ulster University, Cromore Road, Coleraine, BT52 1SA, Northern Ireland, UK.
| | - Finbarr P M O'Harte
- Diabetes Research Group, School of Biomedical Sciences, Ulster University, Cromore Road, Coleraine, BT52 1SA, Northern Ireland, UK
| | - Peter R Flatt
- Diabetes Research Group, School of Biomedical Sciences, Ulster University, Cromore Road, Coleraine, BT52 1SA, Northern Ireland, UK
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Wright JR. Frederick Banting's actual great idea: The role of fetal bovine islets in the discovery of insulin. Islets 2021; 13:121-133. [PMID: 34499012 PMCID: PMC8528409 DOI: 10.1080/19382014.2021.1963188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 07/21/2021] [Accepted: 07/28/2021] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Frederick Banting approached Toronto physiology professor JJR Macleod with a way to prevent pancreatic trypsin from destroying the pancreas' internal secretion. Banting proposed to induce exocrine atrophy by ligating canine pancreatic ducts and to use extracts of islet-rich residua to treat pancreatectomized dogs. His next plan was to make extracts from fetal pancreas, which he had read was islet-rich and lacked exocrine tissue capable of making trypsin; this work has not been historically evaluated. METHODS Banting's fetal calf pancreas story is told using primary and secondary historical sources and then critically examined using both historical and recent data on species phylogeny, islet ontogeny, fetal/neonatal islet culture/transplantation, etc. Results/Discussion: Only ruminants develop dual islets populations sequentially; fetal calf pancreata, at the gestational ages Banting used, possess numerous insulin-rich giant peri-lobular islets, which credibly explain the potency of his fetal calf insulin extract. Use of non-ruminant fetal pancreata would have failed.
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Affiliation(s)
- James R. Wright
- Department of Pathology & Laboratory Medicine, and the Julia McFarlane Diabetes Research Centre, The University of Calgary, Cumming School of Medicine, and Alberta Children’s Hospital, Calgary, Alberta, Canada
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7
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Abstract
Insulin is a key hormone for the regulation of metabolism in vertebrates. Insulin is produced by pancreatic islet cells in response to elevated glucose levels and leads to the uptake of glucose by tissues such as liver and adipose tissue to store energy. Insulin also has additional functions in regulating development. Previous work has shown that the proglucagon gene, which encodes hormones counter regulating insulin, is duplicated in teleost fish, and that the peptide hormones encoded by these genes have diversified in function. I sought to determine whether similar processes have occurred to insulin genes in these species. Searches of fish genomes revealed an unexpected diversity of insulin genes. A triplication of the insulin gene occurred at the origin of teleost fish, however one of these three genes, insc, has been lost in most teleost fish lineages. The two other insulin genes, insa and insb, have been retained but show differing levels of selective constraint suggesting that they might have diversified in function. Intriguingly, a duplicate copy of the insa gene, which I named insab, is found in many fish. The coding sequence encoded by insab genes is under weak selective constraint, with its predicted protein sequences losing their potential to be processed into a two-peptide hormone. However, these sequences have retained perfectly conserved cystine residues, suggesting that they maintain insulin's three-dimensional structure and therefore might modulate the processing and secretion of insulin produced by the other genes.
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Affiliation(s)
- David M Irwin
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, M5S 1A8, Canada; E-mail:.,Banting and Best Diabetes Centre, University of Toronto, Toronto, Ontario, M5S 1A8, Canada
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Jung SH, Kim CK, Lee G, Yoon J, Lee M. Structural Analysis of Recombinant Human Preproinsulins by Structure Prediction, Molecular Dynamics, and Protein-Protein Docking. Genomics Inform 2017; 15:142-146. [PMID: 29307140 PMCID: PMC5769858 DOI: 10.5808/gi.2017.15.4.142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 11/28/2017] [Accepted: 11/28/2017] [Indexed: 12/31/2022] Open
Abstract
More effective production of human insulin is important, because insulin is the main medication that is used to treat multiple types of diabetes and because many people are suffering from diabetes. The current system of insulin production is based on recombinant DNA technology, and the expression vector is composed of a preproinsulin sequence that is a fused form of an artificial leader peptide and the native proinsulin. It has been reported that the sequence of the leader peptide affects the production of insulin. To analyze how the leader peptide affects the maturation of insulin structurally, we adapted several in silico simulations using 13 artificial proinsulin sequences. Three-dimensional structures of models were predicted and compared. Although their sequences had few differences, the predicted structures were somewhat different. The structures were refined by molecular dynamics simulation, and the energy of each model was estimated. Then, protein-protein docking between the models and trypsin was carried out to compare how efficiently the protease could access the cleavage sites of the proinsulin models. The results showed some concordance with experimental results that have been reported; so, we expect our analysis will be used to predict the optimized sequence of artificial proinsulin for more effective production.
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Affiliation(s)
- Sung Hun Jung
- Department of Biological Science, Sangji University, Wonju 26339, Korea
- Theragen Etex Bio Institute, Suwon 16229, Korea
| | | | - Gunhee Lee
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul 06591, Korea
| | - Jonghwan Yoon
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul 06591, Korea
| | - Minho Lee
- Catholic Precision Medicine Research Center, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea
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Hrytsenko O, Pohajdak B, Wright JR. Ancestral genomic duplication of the insulin gene in tilapia: An analysis of possible implications for clinical islet xenotransplantation using donor islets from transgenic tilapia expressing a humanized insulin gene. Islets 2016; 8:e1187352. [PMID: 27222321 PMCID: PMC4987019 DOI: 10.1080/19382014.2016.1187352] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Tilapia, a teleost fish, have multiple large anatomically discrete islets which are easy to harvest, and when transplanted into diabetic murine recipients, provide normoglycemia and mammalian-like glucose tolerance profiles. Tilapia insulin differs structurally from human insulin which could preclude their use as islet donors for xenotransplantation. Therefore, we produced transgenic tilapia with islets expressing a humanized insulin gene. It is now known that fish genomes may possess an ancestral duplication and so tilapia may have a second insulin gene. Therefore, we cloned, sequenced, and characterized the tilapia insulin 2 transcript and found that its expression is negligible in islets, is not islet-specific, and would not likely need to be silenced in our transgenic fish.
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Affiliation(s)
- Olga Hrytsenko
- Biology Department, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Bill Pohajdak
- Biology Department, Dalhousie University, Halifax, Nova Scotia, Canada
| | - James R. Wright
- Department of Pathology & Laboratory Medicine/Calgary Laboratory Services, University of Calgary, Calgary, AB, Canada
- Department of Pediatrics, University of Calgary, Calgary, AB, Canada
- CONTACT James R. Wright, Jr. Departments of Pathology & Laboratory Medicine; University of Calgary and Calgary Laboratory Services; Alberta Children's Hospital;2888 Shaganappi Trail NW; Calgary, Alberta, Canada T3B 6A8
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Mahou R, Passemard S, Carvello M, Petrelli A, Noverraz F, Gerber-Lemaire S, Wandrey C. Contribution of polymeric materials to progress in xenotransplantation of microencapsulated cells: a review. Xenotransplantation 2016; 23:179-201. [PMID: 27250036 DOI: 10.1111/xen.12240] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 05/09/2016] [Indexed: 12/13/2022]
Abstract
Cell microencapsulation and subsequent transplantation of the microencapsulated cells require multidisciplinary approaches. Physical, chemical, biological, engineering, and medical expertise has to be combined. Several natural and synthetic polymeric materials and different technologies have been reported for the preparation of hydrogels, which are suitable to protect cells by microencapsulation. However, owing to the frequent lack of adequate characterization of the hydrogels and their components as well as incomplete description of the technology, many results of in vitro and in vivo studies appear contradictory or cannot reliably be reproduced. This review addresses the state of the art in cell microencapsulation with special focus on microencapsulated cells intended for xenotransplantation cell therapies. The choice of materials, the design and fabrication of the microspheres, as well as the conditions to be met during the cell microencapsulation process, are summarized and discussed prior to presenting research results of in vitro and in vivo studies. Overall, this review will serve to sensitize medically educated specialists for materials and technological aspects of cell microencapsulation.
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Affiliation(s)
- Redouan Mahou
- Interfaculty Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Institute for Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON, Canada
| | - Solène Passemard
- Interfaculty Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Michele Carvello
- Department of Surgery, San Raffaele Scientific Institute, Milan, Italy
| | | | - François Noverraz
- Interfaculty Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Sandrine Gerber-Lemaire
- Interfaculty Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Christine Wandrey
- Interfaculty Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
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Burlak C. Xenotransplantation literature update, November-December 2014. Xenotransplantation 2016; 22:80-3. [PMID: 25676364 DOI: 10.1111/xen.12158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 01/19/2015] [Indexed: 11/27/2022]
Affiliation(s)
- Christopher Burlak
- Department of Surgery, Schulze Diabetes Institute, University of Minnesota, Minneapolis, MN, USA
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Han W, He X, Zhang M, Hu S, Sun F, Ren L, Hua J, Peng S. Establishment of a porcine pancreatic stem cell line using T-REx(™) system-inducible Wnt3a expression. Cell Prolif 2015; 48:301-10. [PMID: 25894737 PMCID: PMC6496436 DOI: 10.1111/cpr.12188] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 01/15/2015] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVES Porcine pancreatic stem cells (PSCs) are highly valuable in transplantation applications for type II diabetes. However, there are still many problems to be solved before they can be used in the clinic, such as insufficient cell number availability and low secretion level of insulin. It has been reported that Wnt3a plays pivotal roles during cell proliferation and differentiation. Here, we have aimed to establish an ideal research platform using the T-REx(™) system, to study mechanisms of Wnt3a during PSC proliferation and differentiation. MATERIALS AND METHODS Construction of the recombinant plasmid and cell transfection were used for establishment of a porcine PSC line. Related gene expressions were examined using quantitative real-time PCR (QRT-PCR), western blotting, immunostaining and flow cytometry. BrdU incorporation assay and cell cycle analysis were used to investigate Wnt3a roles in PSCs. RESULTS Wnt3a-expressing clones regulated by T-REx(™) were successfully obtained. Wnt3a and GFP expression were strictly regulated by Dox in a time- and dose-dependent manner. Furthermore, we found that Wnt3a-expressing porcine PSCs induced by Dox exhibited raised proliferative potential. After Dox stimulation, expression of PCNA, C-MYC and active β-catenin were higher, but were down-regulated after Dkk1 addition. CONCLUSION We established a porcine PSC line that dynamically expressed Wnt3a, and we found that Wnt3a promoted PSC proliferative potential. This inducible expression system thus provides an important tool for further study on porcine PSC development and differentiation.
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Affiliation(s)
- Wei Han
- College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, China; Shaanxi Stem Cell Engineering and Technology Research Center, Northwest A& F University, Yangling, 712100, China
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