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Diabetologia
Published in: Diabetologia 10/2006

01-10-2006 | Article

Insulin modulates the secretion of proteins from mature 3T3-L1 adipocytes: a role for transcriptional regulation of processing

Authors: P. Wang, J. Keijer, A. Bunschoten, F. Bouwman, J. Renes, E. Mariman

Published in: Diabetologia | Issue 10/2006

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Abstract

Aims/hypothesis

Under conditions of insulin resistance and type 2 diabetes, fat cells are subjected to increased levels of insulin, which may have a major impact on the secretion of adipokines.

Materials and methods

Using transcriptomics and proteomics, we investigated how insulin affects the transcription and protein secretion profile of mature 3T3-L1 adipocytes.

Results

We found that insulin has a significant impact on protein secretion of 3T3-L1 adipocytes. However, transcription is not the major regulation point for these secreted proteins. For extracellular matrix components, our data suggest that the mRNA level of processing enzymes, but not of target proteins, is the regulating point at which insulin stimulates secretion and function of the relevant proteins. Among these enzymes, we report a novel finding, namely that sulfatase 2 gene is regulated by insulin, which may induce a functional change in cultured adipocytes.

Conclusions/interpretation

We propose that enhancement of protein processing and secretion rather than transcription of the secreted protein genes is part of the strategic role of insulin in the induction of cellular responses.
Appendix
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Metadata
Title
Insulin modulates the secretion of proteins from mature 3T3-L1 adipocytes: a role for transcriptional regulation of processing
Authors
P. Wang
J. Keijer
A. Bunschoten
F. Bouwman
J. Renes
E. Mariman
Publication date
01-10-2006
Publisher
Springer-Verlag
Published in
Diabetologia / Issue 10/2006
Print ISSN: 0012-186X
Electronic ISSN: 1432-0428
DOI
https://doi.org/10.1007/s00125-006-0321-5

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