Objective:To establish a two-dimensional polyacrylamide gel electrophoresi(s2-DE)technique forplasma/serumproteomics. Methods:Plasmas from 8 healthy volunteers and 10 with hepatocellular carcinoma(HCC)

and sera from 8 HCC were collected.After six proteins of the highest abundance in plasma/sera were depleted by the Multiple Affinity Removal System(MARS)Technologies from Agilent

plasma/sera were subjected to 2-DE.After comparing

analyzing and identifying by the software PD Quest(7.4

0)

the enzyme-digested products of differential expression proteins were analyzed by MALDI-TOF-MS.The Peptide mass fingerprinting(PMF) data were obtained and used to identify proteins through NCBInr data bank.Results:In comparison with the healthy volunteers

20 differential proteins were identified in the plasmas of the HCC patients

among which 18 protein expressions were up-regulated and 2 down-regulated.In the sera of the cancer patients

23 differential proteins were identified

among which 17 protein expressions were up-regulated and 6 down-regulated.Tumor necrosis factor-inducible protein TSG-14 and FADD protein were both identified in the plasmas and sera of the cancer patients.Conclusion:The differential proteins

including RING finger protein 34

Wilms’tumor 1-associating protein

CD147 antigen

Tumor necrosis factor-inducible protein TSG-14 from plasmas group and Protein kinase NYD-SP9

Tumor necrosis factor receptor super family member 19 precursor

Histone-binding protein RBBP4

FADD protein

26S protease regulatory subunit p28

CD82 antigen

Autophagy protein 5 from sera group may be used as markers for HCC in blood.