Cyotomedical therapy for insulinopenic diabetes using microencapsulated pancreatic beta cell lines.

Abstract:

:Current therapy for type 1 diabetes mellitus involves a daily regimen of multiple subcutaneous or intramuscular injections of recombinant human insulin. To achieve long-term insulin delivery in vivo, we investigated the applicability of cytomedical therapy using beta TC6 cells or MIN6 cells, both of which are murine pancreatic beta cell lines that secrete insulin in a subphysiologically or physiologically regulated manner, respectively. We examined this therapy in the insulinopenic diabetic mice intraperitoneally injected with beta TC6 cells or MIN6 cells microencapsulated within alginate-poly(L)lysine-alginate membranes (APA-beta TC6 cells or APA-MIN6 cells). The diabetic mice treated with APA-beta TC6 cells fell into hypoglycemia, whereas those injected with APA-MIN6 cells maintained normal blood glucose concentrations for over 2 months without developing hypoglycemia. In addition, we also conducted an oral glucose tolerance test using these mice. The blood glucose concentrations of normal and of diabetic mice injected with APA-MIN6 cells similarly changed over time, although the blood insulin concentration increased later in the injected diabetic mice than in the former. These results suggest that cytomedicine utilizing microencapsulated pancreatic beta cell lines with a physiological glucose sensor may be a beneficial and safe therapy with which to treat diabetes mellitus.

journal_name

Life Sci

journal_title

Life sciences

authors

Suzuki R,Okada N,Miyamoto H,Yoshioka T,Sakamoto K,Oka H,Tsutsumi Y,Nakagawa S,Miyazaki J,Mayumi T

doi

10.1016/s0024-3205(02)01724-1

subject

Has Abstract

pub_date

2002-08-30 00:00:00

pages

1717-29

issue

15

eissn

0024-3205

issn

1879-0631

pii

S0024320502017241

journal_volume

71

pub_type

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