The role of membrane glycoprotein plasma cell antigen 1 ectonucleotide pyrophosphatase phosphodiesterase 1 in the pathogenesis of insulin resistance and related abnormalities
The role of membrane glycoprotein plasma cell antigen 1 ectonucleotide pyrophosphatase phosphodiesterase 1 in the pathogenesis of insulin resistance and related abnormalities(1402 views) Goldfine ID, Maddux BA, Youngren JF, Reaven G, Accili D, Trischitta V, Vigneri R, Frittitta L
Keywords: Cell Membrane Protein, Ectonucleotide Pyrophosphatase Phosphodiesterase 1, Insulin Receptor, Membrane Glycoprotein Plasma Cell Antigen 1, Protein Tyrosine Kinase, Unclassified Drug, Adipose Tissue, Binding Affinity, Cardiovascular System Examination, Enzyme Activation, Fibroblast, Human, Insulin Binding, Insulin Resistance, Non Insulin Dependent Diabetes Mellitus, Nonhuman, Obesity, Pathogenesis, Priority Journal, Protein Binding, Protein Expression, Protein Function, Protein Phosphorylation, Protein Polymorphism, Protein Structure, Review, Transgenic Mouse, Wild Type, Animals, Diabetes Complications, Disease Models, Female, Gene Expression, Phosphoric Diester Hydrolases, Polycystic Ovary Syndrome, Genetic, Quaternary, Variation (genetics),
Affiliations: *** IBB - CNR ***
Department of Medicine and Diabetes Center, University of California, San Francisco, CA 94115, United States
Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, CA 94305, United States
Diabetes Center, Columbia University, New York, NY 10032, United States
Department of Clinical Sciences, Sapienza University, 00198 Rome, Italy
Research Unit of Diabetes and Endocrinology, Scientific Institute Casa Sollievo Della Sofferenza, 71013 San Giovanni Rotondo, Italy
Endocrinologia, Ospedale Garibaldi, University of Catania, 95122 Catania, Italy
References: Not available.
The role of membrane glycoprotein plasma cell antigen 1 ectonucleotide pyrophosphatase phosphodiesterase 1 in the pathogenesis of insulin resistance and related abnormalities
Insulin resistance is a major feature of most patients with type 2 diabetes mellitus (T2D). A number of laboratories have observed that membrane glycoprotein plasma cell antigen 1 (PC-1) [ ectonucleotide pyrophosphatase phosphodiesterase 1] is either overexpressed or overactive in muscle, adipose tissue, fibroblasts, and other tissues of insulin-resistant individuals, both nondiabetic and diabetic. Moreover, in cultured cells in vitro and in transgenic mice in vivo, PC-1 overexpression impairs insulin stimulation of insulin receptor (IR) activation and downstream signaling. PC-1 binds to the connecting domain of the IR alpha-subunit that is located in residues 485-599. The connecting domain transmits insulin binding the alpha- subunit to activation of tyrosine kinase activation in the beta- subunit. When PC-1 is overexpressed, it inhibits insulin-induced IR beta- subunit tyrosine kinase activity. In addition, a polymorphism of PC-1 ( K121Q) in various ethnic populations is closely associated with insulin resistance, T2D, and cardio-and nephrovascular diseases. The product of this polymorphism has a 2- to 3-fold increased binding affinity for the IR and is more potent than the wild-type PC-1 protein ( K121K) in inhibiting the IR. These data suggest therefore that PC-1 is a candidate protein that may play a role in human insulin resistance and T2D by its overexpression, its overactivity, or both.
The role of membrane glycoprotein plasma cell antigen 1 ectonucleotide pyrophosphatase phosphodiesterase 1 in the pathogenesis of insulin resistance and related abnormalities
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The role of membrane glycoprotein plasma cell antigen 1 ectonucleotide pyrophosphatase phosphodiesterase 1 in the pathogenesis of insulin resistance and related abnormalities