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Goosen MF, O'Shea GM, Gharapetian HM, et al. Optimization of microencapsulation parameters: Semipermeable microcapsules as a bioartificial pancreas. Biotechnol Bioeng. 1985;27(2):146-50doi: 10.1002/bit.260270207.
Goosen, M. F., O'Shea, G. M., Gharapetian, H. M., Chou, S., & Sun, A. M. (1985). Optimization of microencapsulation parameters: Semipermeable microcapsules as a bioartificial pancreas. Biotechnology and bioengineering, 27(2), 146-50. https://doi.org/10.1002/bit.260270207
Goosen, M F, et al. "Optimization of microencapsulation parameters: Semipermeable microcapsules as a bioartificial pancreas." Biotechnology and bioengineering vol. 27,2 (1985): 146-50. doi: https://doi.org/10.1002/bit.260270207
Goosen MF, O'Shea GM, Gharapetian HM, Chou S, Sun AM. Optimization of microencapsulation parameters: Semipermeable microcapsules as a bioartificial pancreas. Biotechnol Bioeng. 1985 Feb;27(2):146-50. doi: 10.1002/bit.260270207. PMID: 18553649.
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Biotechnol Bioeng. 1985 Feb;27(2):146-50. doi: 10.1002/bit.260270207.

Optimization of microencapsulation parameters: Semipermeable microcapsules as a bioartificial pancreas.

Biotechnology and bioengineering

M F Goosen, G M O'Shea, H M Gharapetian, S Chou, A M Sun

Affiliations

  1. Connaught Research Institute, 1755 Steeles Avenue West, Willowdale, Ontario M2N 3T4 Canada.

PMID: 18553649 DOI: 10.1002/bit.260270207

Abstract

An improved membrane has been developed for the microencapsulation of islets of Langerhans which protects these cells from the immune system. These requirements were accomplished through the optimization of important microencapsulation parameters and through the improved biocompatibility of a new alginate-poly-l-lysine (PLL)-alginate capsule membrane. Spherical and smooth microcapsules could be formed by utilizing a purer sodium alginate and by keeping the viscosity of the sodium alginate solution above 30 cps. The strength of the capsule membrane was enhanced by increasing the alginate-PLL reaction time as well as the PLL concentration. The permeability of the membrane [4 mum thick, 93% (w/w) water] was a function of the viscosity average molecular weight (Mv) of the PLL (Mv = 4000-4 x 10(5)) used in the encapsulation procedure. Microcapsules prepared with PLL with Mv = 1.7 x 10(4) were the least permeable, being impermeable to normal serum immunoglobulin, albumin, and haemoglobin. The microencapsulation procedure, by protecting transplanted tissue from the components of the immune system, has great clinical potential as a new form of treatment for diseases such as diabetes and liver disease.

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