Deficiency of the bone mineralization inhibitor NPP1 protects mice against obesity and diabetes

Carmen Huesa, Dongxing Zhu, James D. Glover, Mathieu Ferron, Gerard Karsenty, Elspeth M. Milne, José Luis Millan, S. Faisal Ahmed, Colin Farquharson, Nicholas M. Morton, Vicky E. MacRae

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

The emergence of bone as an endocrine regulator has prompted a re-evaluation of the role of bone mineralization factors in the development of metabolic disease. Ectonucleotide pyrophosphatase/phosphodiesterase-1 (NPP1) controls bone mineralization through the generation of pyrophosphate, and levels of NPP1 are elevated both in dermal fibroblast cultures and muscle of individuals with insulin resistance. We investigated the metabolic phenotype associated with impaired bone metabolism in mice lacking the gene that encodes NPP1 (Enpp1(-/-) mice). Enpp1(-/-) mice exhibited mildly improved glucose homeostasis on a normal diet but showed a pronounced resistance to obesity and insulin resistance in response to chronic high-fat feeding. Enpp1(-/-) mice had increased levels of the insulin-sensitizing bone-derived hormone osteocalcin but unchanged insulin signalling within osteoblasts. A fuller understanding of the pathways of NPP1 could inform the development of novel therapeutic strategies for treating insulin resistance.

Original languageEnglish
Pages (from-to)1341-50
Number of pages10
JournalDisease Models & Mechanisms
Volume7
Issue number12
DOIs
Publication statusPublished - 5 Dec 2014
Externally publishedYes

Keywords

  • Animals
  • Bone Remodeling
  • Bone and Bones
  • Diabetes Mellitus
  • Disease Models, Animal
  • Fibroblasts
  • Gene Deletion
  • Glucose
  • Homeostasis
  • Hydrolysis
  • Insulin
  • Insulin Resistance
  • Male
  • Mice
  • Mice, Knockout
  • Obesity
  • Osteoblasts
  • Osteocalcin
  • Phenotype
  • Phosphoric Diester Hydrolases
  • Pyrophosphatases
  • Signal Transduction
  • Journal Article
  • Research Support, Non-U.S. Gov't

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