title: ENPP1 gene, insulin resistance and related clinical outcomes.
abstract: OBJECTIVE
  Insulin resistance plays a significant role in both morbidity and mortality of the general population. Understanding the molecular mechanisms of insulin resistance would help the identification of at-risk individuals in the presymptomatic stage, and the discovery of novel and more effective treatments. The transmembrane glycoprotein ectonucleotide pyrophosphatase phosphodiesterase 1 (ENPP1) inhibits insulin receptor signalling and has recently emerged as a key player in the development of insulin resistance. This review will summarize data available on the relationship between ENPP1 and insulin resistance.
  
  
  RESULTS
  Overexpression of ENPP1 in insulin target tissues is an early, intrinsic defect observed in human insulin resistance. A missense ENPP1 single nucleotide polymorphism, K121Q, has been recently described with the Q121 variant being a stronger inhibitor than K121 of insulin receptor function. In addition, the Q121 variant has been repeatedly associated with insulin resistance and related abnormalities including body weight changes, type 2 diabetes and macrovascular complications, thus suggesting a pleiotropic role of the ENPP1 gene on several metabolic abnormalities.
  
  
  CONCLUSIONS
  A deep understanding of ENPP1 mode of action and the mechanisms regulating its expression and function are likely to provide new tools for early identification and treatments of patients at risk for the devastating clinical outcomes related to insulin resistance.
authors.affiliation: Research Laboratory of Diabetes and Endocrine Diseases, CSS Scientific Institute, San Giovanni Rotondo, Italy.
authors.forename: Simonetta
authors.initials: S
authors.lastname: Bacci
authors.forename: Salvatore
authors.initials: S
authors.lastname: De Cosmo
authors.forename: Sabrina
authors.initials: S
authors.lastname: Prudente
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Trischitta
mesh_terms: D003924:Diabetes Mellitus, Type 2 / Q000235:genetics*; D008040:Genetic Linkage; D006801:Humans; D007333:Insulin Resistance / Q000235:genetics*; D020125:Mutation, Missense; D009765:Obesity / Q000235:genetics*; D010727:Phosphoric Diester Hydrolases / Q000235:genetics* / Q000502:physiology; D020641:Polymorphism, Single Nucleotide; D011755:Pyrophosphatases / Q000235:genetics* / Q000502:physiology; D015398:Signal Transduction / Q000235:genetics
chemical_list: D010727:Phosphoric Diester Hydrolases; C065962:ectonucleotide pyrophosphatase phosphodiesterase 1; D011755:Pyrophosphatases