Relationship between pancreatic vesicular monoamine transporter 2 (VMAT2) and insulin expression in human pancreas.

Abstract:

:Vesicular monoamine transporter 2 (VMAT2) is expressed in pancreatic beta cells and has recently been proposed as a target for measurement of beta cell mass in vivo. We questioned, (1) What proportion of beta cells express VMAT2? (2) Is VMAT2 expressed by other pancreatic endocrine or non-endocrine cells? (3) Is the relationship between VMAT2 and insulin expression disturbed in type 1 (T1DM) or type 2 diabetes (T2DM)? Human pancreas (7 non-diabetics, 5 T2DM, 10 T1DM) was immunostained for insulin, VMAT2 and other pancreatic hormones. Most beta cells expressed VMAT2. VMAT2 expression was not changed by the presence of diabetes. In tail of pancreas VMAT2 immunostaining closely correlated with insulin staining. However, VMAT2 was also expressed in some pancreatic polypeptide (PP) cells. Although VMAT2 was not excluded as a target for beta cell mass measurement, expression of VMAT2 in PP cells predicts residual VMAT2 expression in human pancreas even in the absence of beta cells.

journal_name

J Mol Histol

authors

Saisho Y,Harris PE,Butler AE,Galasso R,Gurlo T,Rizza RA,Butler PC

doi

10.1007/s10735-008-9195-9

subject

Has Abstract

pub_date

2008-10-01 00:00:00

pages

543-51

issue

5

eissn

1567-2379

issn

1567-2387

journal_volume

39

pub_type

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