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Background

It is recognized that the ability of adipose tissue to expand in response to energy excess, i.e. adipocyte maturation, is important in determining systemic abnormalities in glucose and lipid metabolism. Ectonucleotide pyrophosphatase phosphodiesterase 1 (ENPP1, also known as PC-1) has been recently reported to be involved in the pathogenesis of insulin resistance and related diseases. However, its role on adipose tissue physiology as a mechanism of systemic insulin resistance is not understood. This study was performed to evaluate whether ENPP1 is regulated during adipogenesis and whether over-expression in adipocytes can affect adipocyte maturation, a potential novel mechanism of ENPP1-related insulin resistance.

Methodology/principal findings

ENPP1 expression was found down-regulated during 3T3-L1 maturation, and over-expression of human ENPP1 in 3T3-L1 (pQCXIP-ENPP1 vector) resulted in adipocyte insulin resistance and in defective adipocyte maturation. Adipocyte maturation was more efficient in mesenchymal embryonal cells from ENPP1 knockout mice than from wild-type.

Conclusions

We identify ENPP1 as a novel mechanism of defective adipocyte maturation. This mechanism could contribute to the pathogenesis of insulin resistance in absence of obesity."xsd:string
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http://purl.uniprot.org/citations/17849011http://purl.uniprot.org/core/author"Fu M."xsd:string
http://purl.uniprot.org/citations/17849011http://purl.uniprot.org/core/author"Liang J."xsd:string
http://purl.uniprot.org/citations/17849011http://purl.uniprot.org/core/author"Ciociola E."xsd:string
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http://purl.uniprot.org/citations/17849011http://purl.uniprot.org/core/author"Chandalia M."xsd:string
http://purl.uniprot.org/citations/17849011http://purl.uniprot.org/core/date"2007"xsd:gYear
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http://purl.uniprot.org/citations/17849011http://purl.uniprot.org/core/title"Role of ENPP1 on adipocyte maturation."xsd:string
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