ABSTRACT
Objective To provide more valuable information for diagnosis of dilated cardiomyopathy (DCM),we detected differentially expressed proteins in serum from patients with DCM and healthy people and protein biomarkers were selected.Methods During the period from march 2011 to may,a total of 29 samples of resident patients with DCM from Qilu Hospital of Shandong University,Jinan Central Hospital and Jinan First Peoples Hospital and 30 local healthy people in Jinan were selected as DCM and control groups,respectively.Serum samples from these patients with DCM and controls were detected by ClinProt MALDII-TOF-MS.ClinProTools 2.2 software was used to get mass spectrometric data.The ClinPrott discrimination model was established to screen out differentially expressed proteins as potential biomarkers.Results Via comparing proteins/polypeptides peaks of DCM patients and healthy controls,57 of all 73 peaks were found to be significantly different between the two groups.Compared with the control group,35 peaks were up-expressed while the other 22 peaks were downexpressed.Five peaks were screened out as protein biomarkers.They were mass-to-charge ratio (m/z):4 247.95,4 209.37,1 058.69,1 074.78,and 2 364.71.The sensitivity and specificity of ClinPrott discrimination model was 99.14％ and 99.16％,respectively.Conclusion Patients with DCM have expressed serum proteins differently and we have found five protein markers which might have some value for diagnosis of DCM.