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Biochemical consequences of alginate encapsulation: A NMR study of insulin-secreting cells
KTH, School of Technology and Health (STH), Medical Engineering.
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2006 (English)In: Biomaterials, ISSN 0142-9612, E-ISSN 1878-5905, Vol. 27, no 12, 2577-2586 p.Article in journal (Refereed) Published
Abstract [en]

In this study we explore the biochemical consequences of alginate encapsulation on beta TC3 cells. C-13 NMR spectroscopy and isotopomer analysis were used to investigate the effects of encapsulation on several enzymatic processes associated with the TCA cycle. Our data show statistically significant differences in various enzymatic fluxes related to the TCA cycle and insulin secretion between monolayer and algainate-encapsulated cultures. The principal cause for these effects was the process of trypsinization. Embedding the trypsinized cells in alginate beads did not have a compounded effect on the enzymatic fluxes of entrapped cells. However, an additional small but statistically significant decrease in insulin secretion was measured in encapsulated cells. Finally, differences in either enzymatic fluxes or Qlucose consumption as a function of bead diameter were not observed. However, differences in T-2, assessed by H-1 NMR microimaging, were observed as a function of bead diameter, suggesting that smaller beads became more organized with time in culture, while larger beads displayed a looser organization.

Place, publisher, year, edition, pages
2006. Vol. 27, no 12, 2577-2586 p.
Keyword [en]
alginate, metabolism, C-13 NMR, isotopomer
National Category
Biological Sciences
URN: urn:nbn:se:kth:diva-37621DOI: 10.1016/j.biomaterials.2005.11.042ISI: 000235722100008PubMedID: 16364429ScopusID: 2-s2.0-30944459237OAI: diva2:434520
Available from: 2011-08-15 Created: 2011-08-15 Last updated: 2011-08-15Bibliographically approved

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