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Neonatal pig pancreatic duct-derived insulin-producing cells: preliminary in vitro studies.

Abstract：

:Neonatal pig pancreata could represent an ideal tissue resource for donor islets for transplantation trials. Because functional islet beta-cells could derive from precursors situated in the ductal system, and neonatal animals are better suitable than adults for recovering such elements, we have examined whether isolated neonatal pancreatic ducts (NPD) could form insulin-producing cells. NPD, retrieved from the pancreas by collagenase digestion, were cultured for 2 weeks. A compact tissue monolayer detached by trypsin was re-incubated to form upon culture. The primary tissue monolayer was plated, yielding secondary monolayers that were supplemented in culture with the following factors: insulin transferrin selenium, niacinamide, keratinocyte growth factor, and high glucose, which promoted formation of islet cell-like clusters during 30 days of culture. Upon reaching 50 to 100 microm in diameter, the cell clusters were subjected to morphologic examination (assessment of viability by staining with ethidium bromide+fluorescein diacetate [EB+FD]; staining for insulin with diphenylthiocarbazone [DTZ]); DNA assay; insulin radioimmunoassay both in the basal state and after in vitro static incubation with high glucose; immunolabeling with anti-insulin fluorescent antibodies. Of the cell clusters, 80% were composed of viable cells that faintly showed DTZ staining. Basal insulin was 16.7 microU/mL, but no insulin response was elicited by stimulation with high glucose. Acid-ethanol extraction showed high insulin levels in the clusters. Finally, immunofluorescence for insulin was positive, indicating the presence of beta-cell-like committed elements. In conclusion, NPD may differentiate into insulin-producing cells, which are at a very early stage when the glucose-sensing apparatus is still immature.

journal_name

Transplant Proc

journal_title

Transplantation proceedings

authors

Basta G,Racanicchi L,Mancuso F,Guido L,Macchiarulo G,Luca G,Calabrese G,Brunetti P,Calafiore R

doi

10.1016/j.transproceed.2004.03.074

subject

Has Abstract

pub_date

2004-04-01 00:00:00

pages

609-11

issue

3

eissn

0041-1345

issn

1873-2623

pii

S0041134504003355

journal_volume

36

pub_type

杂志文章

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