TY - JOUR
T1 - The discovery of biomarkers for type 2 diabetic nephropathy by serum proteome analysis
AU - Cho, Eun Hee
AU - Kim, Mi Ryung
AU - Kim, Hyun Jung
AU - Lee, Do Yeon
AU - Kim, Pan Kyeom
AU - Choi, Kyung Mook
AU - Ryu, Ohk Hyun
AU - Kim, Chan Wha
PY - 2007/4
Y1 - 2007/4
N2 - Diabetic nephropathy (DN) is a serious kidney complication of diabetes, and constitutes the leading cause of end-stage renal disease. The earliest clinical evidence of DN is microalbuminuria, a term which refers to the appearance of small but abnormal amounts of albumin in the urine. However, screening methods for DN, such as biomarker assays, are yet to be developed for type 2 DN. In the present study, in an attempt to identify the biomarkers for initial diagnoses of type 2 DN, the protein profiles of human sera collected from 30 microalbuminuric type 2 diabetic patients were compared with those collected from 30 normoalbuminuric type 2 diabetic patients, via 2-DE. As a result, a total of 18 spots were determined to have different protein levels in the microalbuminuric patients. Twelve spots had lower protein levels of approximately 50%, and the other six had higher levels of approximately 100-300% as compared to the spots of normoalbuminuric patients. These spots were identified with ESI-Q-TOF (ESI-quadrupole-TOF) MS. Among the identified proteins, vitamin D-binding protein (DBP) and pigment epithelium-derived factor (PEDF) were verified by Western blotting. The results of this study indicate that the DBP may be employed as diagnostic and monitoring biomarkers of type 2 DN, contingent on further study into the matter.
AB - Diabetic nephropathy (DN) is a serious kidney complication of diabetes, and constitutes the leading cause of end-stage renal disease. The earliest clinical evidence of DN is microalbuminuria, a term which refers to the appearance of small but abnormal amounts of albumin in the urine. However, screening methods for DN, such as biomarker assays, are yet to be developed for type 2 DN. In the present study, in an attempt to identify the biomarkers for initial diagnoses of type 2 DN, the protein profiles of human sera collected from 30 microalbuminuric type 2 diabetic patients were compared with those collected from 30 normoalbuminuric type 2 diabetic patients, via 2-DE. As a result, a total of 18 spots were determined to have different protein levels in the microalbuminuric patients. Twelve spots had lower protein levels of approximately 50%, and the other six had higher levels of approximately 100-300% as compared to the spots of normoalbuminuric patients. These spots were identified with ESI-Q-TOF (ESI-quadrupole-TOF) MS. Among the identified proteins, vitamin D-binding protein (DBP) and pigment epithelium-derived factor (PEDF) were verified by Western blotting. The results of this study indicate that the DBP may be employed as diagnostic and monitoring biomarkers of type 2 DN, contingent on further study into the matter.
KW - 2-DE
KW - Biomarker
KW - Diabetic nephropathy
KW - Microalbuminuria
KW - Vitamin D-binding protein
UR - http://www.scopus.com/inward/record.url?scp=34548191121&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34548191121&partnerID=8YFLogxK
U2 - 10.1002/prca.200600608
DO - 10.1002/prca.200600608
M3 - Article
C2 - 21136688
AN - SCOPUS:34548191121
VL - 1
SP - 352
EP - 361
JO - Proteomics - Clinical Applications
JF - Proteomics - Clinical Applications
SN - 1862-8346
IS - 4
ER -
