Adipose tissue dysfunction in humans: A potential role for the transmembrane protein ENPP1

Manisha Chandalia, Himara Davila, Wentong Pan, Magdalena Szuszkiewicz, Demidmaa Tuvdendorj, Edward H. Livingston, Nicola Abate

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Context: Adipose tissue (AT) helps to regulate body fat partitioning and systemic lipid/glucose metabolism. We have recently reported lipid/glucose metabolism abnormalities and increased liver triglyceride content in an AT-selective transgenic model overexpressing ectonucleotide pyrophosphatase/ phosphodiesterase-1 (ENPP1), the AdiposeENPP1-Tg mouse. Objective: The aim of the study was to test the translational hypothesis that AT-ENPP1 overexpression associates with AT dysfunction (changes in AT gene expression, plasma fatty acid, and adipokine levels), increased liver triglyceride deposition, and systemic insulin resistance in humans. Design/Setting/Participants: A total of 134 young normoglycemic men and women were subjected to body composition studies, hyperinsulinemic-euglycemic clamps, and AT needle biopsy. Twenty men also had liver/muscle nuclear magnetic resonance spectroscopy. Main Outcome Measures: Predetermined measures included AT expression of ENPP1 and other lipid metabolism/inflammation genes, plasma adipokines, and nonesterified fatty acid (NEFA) levels, liver/muscle triglyceride content, and the systemic glucose disposal rate. Results: After statistical adjustment for body fat content, increasing AT-ENPP1 was associated with up-regulation of genes involved in NEFA metabolism and inflammation, increased postabsorptive NEFA levels, decreased plasma adiponectin, increased liver triglyceride content, and systemic insulin resistance in men. In women, there were no changes in plasma adiponectin, NEFAs, or glucose disposal rate associated with increasing AT-ENPP1, despite increased expression of lipid metabolism and inflammation genes in AT. Conclusions: Increased AT-ENPP1 is associated with AT dysfunction, increased liver triglyceride deposition, and systemic insulin resistance in young normoglycemic men. These findings are concordant with the AdiposeENPP1-Tg phenotype and identify a potential target of therapy for health complications of AT dysfunction, including type 2 diabetes and cardiovascular disease.

Original languageEnglish
Pages (from-to)4663-4672
Number of pages10
JournalJournal of Clinical Endocrinology and Metabolism
Volume97
Issue number12
DOIs
StatePublished - Dec 2012

Fingerprint

Membrane Potentials
Adipose Tissue
Tissue
Liver
Proteins
Triglycerides
Nonesterified Fatty Acids
Lipid Metabolism
Metabolism
Plasmas
Glucose
Adipokines
Genes
Insulin Resistance
Adiponectin
Insulin
ectonucleotide pyrophosphatase phosphodiesterase 1
Inflammation
Muscle
Fats

ASJC Scopus subject areas

  • Biochemistry
  • Clinical Biochemistry
  • Endocrinology
  • Biochemistry, medical
  • Endocrinology, Diabetes and Metabolism

Cite this

Adipose tissue dysfunction in humans : A potential role for the transmembrane protein ENPP1. / Chandalia, Manisha; Davila, Himara; Pan, Wentong; Szuszkiewicz, Magdalena; Tuvdendorj, Demidmaa; Livingston, Edward H.; Abate, Nicola.

In: Journal of Clinical Endocrinology and Metabolism, Vol. 97, No. 12, 12.2012, p. 4663-4672.

Research output: Contribution to journalArticle

Chandalia, Manisha ; Davila, Himara ; Pan, Wentong ; Szuszkiewicz, Magdalena ; Tuvdendorj, Demidmaa ; Livingston, Edward H. ; Abate, Nicola. / Adipose tissue dysfunction in humans : A potential role for the transmembrane protein ENPP1. In: Journal of Clinical Endocrinology and Metabolism. 2012 ; Vol. 97, No. 12. pp. 4663-4672.
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