Proteomic profiling of nonenzymatically glycated proteins in human plasma and erythrocyte membranes.
Title | Proteomic profiling of nonenzymatically glycated proteins in human plasma and erythrocyte membranes. |
Publication Type | Journal Article |
Year of Publication | 2008 |
Authors | Zhang Q, Tang N, Schepmoes AA, Phillips LS, Smith RD, Metz TO |
Journal | J Proteome Res |
Keywords | Amino Acid Sequence, Blood Proteins, Diabetes Mellitus, Type 2, Erythrocyte Membrane, Gene Expression Profiling, Glycosylation, Humans, Molecular Sequence Data, Peptides, Plasma, Proteome, Random Allocation |
Abstract | Nonenzymatic glycation of peptides and proteins by d-glucose has important implications in the pathogenesis of diabetes mellitus, particularly in the development of diabetic complications. In this work, we report the first proteomics-based characterization of nonenzymatically glycated proteins in human plasma and erythrocyte membranes from individuals with normal glucose tolerance, impaired glucose tolerance, and type 2 diabetes mellitus. Phenylboronate affinity chromatography was used to enrich glycated proteins and glycated tryptic peptides from both human plasma and erythrocyte membranes. The enriched peptides were subsequently analyzed by liquid chromatography coupled with electron transfer dissociation-tandem mass spectrometry, resulting in the confident identification of 76 and 31 proteins from human plasma and erythrocyte membranes, respectively. Although most of the glycated proteins could be identified in samples from individuals with normal glucose tolerance, slightly higher numbers of glycated proteins and more glycation sites were identified in samples from individuals with impaired glucose tolerance and type 2 diabetes mellitus. |
DOI | 10.1021/pr700763r |
Alternate Journal | J. Proteome Res. |
PubMed ID | 18396901 |
PubMed Central ID | PMC2731429 |
Grant List | DK066204 / DK / NIDDK NIH HHS / United States DK071283 / DK / NIDDK NIH HHS / United States P41 RR018522-06 / RR / NCRR NIH HHS / United States R33 DK071283-03 / DK / NIDDK NIH HHS / United States RR00039 / RR / NCRR NIH HHS / United States RR018522 / RR / NCRR NIH HHS / United States |