Conophylline and betacellulin-delta4: an effective combination of differentiation factors for pancreatic beta cells.

Abstract:

:Conophylline and betacellulin-delta4 reproduce differentiation-inducing activity of activin A and betacellulin, respectively. We examined the effect of conophylline and betacellulin-delta4 on beta cell differentiation. In AR42J cells, conophylline and betacellulin-delta4 converted them into insulin-producing cells. Cells treated with conophylline and betacellulin-delta4 continued to grow after differentiation. Thus, cell number and insulin content were much greater compared to cells treated with activin A and betacellulin. Furthermore, cells treated with conophylline and betacellulin-delta4 secreted insulin in response to glucose. Likewise, conophylline and betacellulin-delta4 converted pancreatic ductal cells into insulin-producing cells. Insulin content, cell number and glucose-evoked insulin secretion were significantly greater than those in cells treated with activin A and betacellulin. Transplantation of pseudoislets prepared using ductal cells treated with conophylline and betacellulin-delta4 was able to reduce effectively the plasma glucose concentration in streptozotocin-treated nude mice. Conophylline and betacellulin-delta4 are effective in inducing differentiation of beta cells from progenitors.

journal_name

Endocr J

journal_title

Endocrine journal

authors

Kitamura R,Ogata T,Tanaka Y,Motoyoshi K,Seno M,Takei I,Umezawa K,Kojima I

doi

10.1507/endocrj.k06-199

subject

Has Abstract

pub_date

2007-04-01 00:00:00

pages

255-64

issue

2

eissn

0918-8959

issn

1348-4540

pii

JST.JSTAGE/endocrj/K06-199

journal_volume

54

pub_type

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