Identification of potential biomarkers of Peyronie's disease.
OBJECTIVE
To identify proteins that are differentially expressed in cells derived from normal and diseased tunica albuginea (TA) as related to Peyronie's disease (PD).


METHODS
Cells with characteristics of fibroblasts were isolated from two tissue sources. Those from the plaque of patients with PD were designated as PT cells, and those from the normally-appearing TA of the same patients were designated as NT cells. Messenger RNAs of these cells were analyzed by real-time polymerase chain reaction (RT-PCR) for the expression of monocyte chemoattractant protein 1 (MCP-1). Crude protein lysates were analyzed by surface-enhanced laser desorption/ionization mass spectrometry (SELDI-MS) with IMAC30-Cu, CM10, and H50 chips. Each lysate was then separated into six fractions, which were further analyzed by SELDI-MS.


RESULTS
RT- PCR analysis showed that PT cells expressed higher levels of MCP-1 than their counterpart NT cells. SELDI-MS analysis showed that the crude protein lysates of all four cell strains produced similar and reproducible protein profiles on IMAC30-Cu and CM10 chips. Additional SELDI-MS analyses with the fractionated lysates detected three proteins of 11.6 kDa, 14.5 kDa, 22.6 kDa that were upregulated in PT cells and two proteins of 6.3 kDa and 46.9 kDa that were downregulated in PT cells.


CONCLUSIONS
MCP-1, which is often involved in tissue fibrosis, was expressed at higher levels in PT than that in NT cells. Five potential biomarkers for PD were identified by SELDI-MS analysis.
Lin
Gui-Ting
GT
Knuppe Molecular Urology Laboratory, Department of Urology, School of Medicine, University of California, San Francisco, CA 94143-1695, USA.
Wang
Zhong
Z
Liu
Ben-Chun
BC
Lue
Tom F
TF
Lin
Ching-Shwun
CS
D001483:Base Sequence; D015415:Biomarkers / Q000032:analysis*; D002478:Cells, Cultured; D018932:Chemokine CCL2 / Q000378:metabolism*; D017931:DNA Primers; D006801:Humans; D008297:Male; D013058:Mass Spectrometry / Q000379:methods; D010411:Penile Induration / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction
D015415:Biomarkers; D018932:Chemokine CCL2; D017931:DNA Primers