Cryopreservation of Insulin-Producing Cells Microencapsulated in Sodium Cellulose Sulfate
| Autor: | Vanessa Stadlbauer, Silvia Schaffellner, Carolin Lackner, Florian Iberer, G. Halwachs, K.-H. Tscheliessnigg, O. Hauser, Philipp Stiegler |
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| Rok vydání: | 2006 |
| Předmět: |
endocrine system
medicine.medical_specialty Transplantation Heterologous Cell Islets of Langerhans Transplantation Capsules Cell Count Cryopreservation Cell Line Islets of Langerhans chemistry.chemical_compound Cricetinae Internal medicine Insulin Secretion medicine Glycerol Animals Insulin Viability assay Cellulose Transplantation geography geography.geographical_feature_category Chemistry Cell growth Islet medicine.anatomical_structure Endocrinology Biochemistry Surgery Pancreas Cell Division |
| Zdroj: | Transplantation Proceedings. 38:3026-3030 |
| ISSN: | 0041-1345 |
| Popis: | Introduction Diabetes mellitus may be treated with pancreatic islet cell transplantation. The use of xenogenic islet cells may overcome the shortage of human donor organs. Microencapsulation seems to be a promising method for immunoprotection. Since isolation, purification, encapsulation, and transplantation of islet cells are labor-intensive, cryopreservation has emerged as an attractive system for islet banking. In this study sodium cellulose sulfate (NaCS), a novel method for microencapsulation of islet cells, was tested for its capability to protect cells during cryopreservation. Methods HIT-T15 cells were microencapsulated in NaCS. Cells were frozen and thawed using three different media containing varying amounts of dimethylsulfoxide (DMSO) and glycerol. Cell viability and cell growth were monitored using 3-(-4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide before freezing and 1 week after thawing. Results NaCS did not show any negative impact on the growth rates of encapsulated HIT-T15 cells compared with nonencapsulated controls. Nonencapsulated cells were adequately crypreserved by both DMSO- and glycerol-containing freezing media. DMSO was not suitable for cryopreservation of encapsulated HIT-T15 cells, whereas glycerol seemed to produce no considerable cell loss during freezing and thawing. Discussion Islet banking of cells encapsulated in NaCS was feasible. Microencapsulation did not harm islet cell recovery. As NaCS is less immunogenic and more biocompatible than other materials used for microencapsulation, it may be a promising method for immunoisolation of islet cells to replace the endocrine pancreas in a physiological way. |
| Databáze: | OpenAIRE |
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