Synthesis and transport characterization of alginate/aminopropyl-silicate/alginate microcapsule: Application to bioartificial pancreas

Shinji Sakai, Tsutomu Ono, Hiroyuki Ijima, Koei Kawakami

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

To develop a novel type of immunoisolation membrane for a microcapsule-shaped bioartificial pancreas, we attempted to use a sol-gel synthesized silicate. An aminopropyl-silicate membrane derived from 3-aminopropyltrimethoxysilane and tetramethoxysilane was formed on Ca-alginate gel beads via electrostatic interaction. The positively charged amino groups remaining on the surface of the resultant gel beads were neutralized by immersion in an aqueous Na-alginate solution. From measurements of the partition coefficients and effective diffusivities of different substances to the gel beads, it was found that the aminopropyl-silicate membrane prepared under optimized composition of silicon alkoxide precursors successfully rejected γ-globulin, giving good permeability to substances having a low molecular weight. Islets could be encapsulated within the newly developed microcapsules while retaining their ability to secrete insulin.

Original languageEnglish
Pages (from-to)2827-2834
Number of pages8
JournalBiomaterials
Volume22
Issue number21
DOIs
Publication statusPublished - Aug 22 2001

Fingerprint

Silicates
Alginate
Capsules
Pancreas
Gels
Membranes
Insulin
Globulins
Silicon
Coulomb interactions
Sol-gels
Immersion
Polymethyl Methacrylate
Static Electricity
Molecular weight
Permeability
Molecular Weight
Chemical analysis
alginic acid

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Ceramics and Composites
  • Biophysics
  • Biomaterials
  • Mechanics of Materials

Cite this

Synthesis and transport characterization of alginate/aminopropyl-silicate/alginate microcapsule : Application to bioartificial pancreas. / Sakai, Shinji; Ono, Tsutomu; Ijima, Hiroyuki; Kawakami, Koei.

In: Biomaterials, Vol. 22, No. 21, 22.08.2001, p. 2827-2834.

Research output: Contribution to journalArticle

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