Meanwhile, five out of 17 proteins, named Cyclin-dependent kinase inhibitor p12, Cyclin-dependent kinase inhibitor 1, Antioxidant protein 2, Protein disulfide isomerase A2, C1-tetrahydrofolate synthase were down-regulated both in LC-developed HCC and CHB-developed HCC. However, two identified proteins, c-Jun N-terminal kinase 2 and ADP/ATP carrier protein were found
to be up-regulated only in CHB-developed HCC tumorous tissues. The expressions of insulin-like growth factor click here binding protein 2 and Rho-GTPase-activating protein 4 were up-regulated in LC liver tissues and CHB liver tissues, respectively. Classification of all learn more proteins [see Additional file 1] showed that HCC is such a complicated disease involving multiple-aspects and genes in the differentially expressed proteome at the level of whole-cell extract.
Although a few special proteins differentially expressed in CHB-developed HCC or LC-developed HCC, most of identified proteins expressed in both CHB-developed HCC and LC-developed HCC, which indicates that there are common features between CHB-developed HCC and LC-developed HCC. Among the 17 proteins identified in this study, 11 proteins have been already described by previous studies, or are already known to be involved in Staurosporine clinical trial hepatocarcinogenesis. These proteins are involved in cell growth, proliferation, differentiation, metabolism, cell cycle regulation, cytoskeleton and signal transduction. Importantly, 6 novel proteins including 3 up-regulated proteins (CDC27Hs, ADP/ATP carrier protein, Insulin-stimulated protein kinase 1) and 3 down-regulated proteins (Rho-GTPase-activating protein 4, Antioxidant protein 2, C1-tetrahydrofolate synthase), were identified in our study. Although these proteins were obtained on a limited number of patients, it should be pointed out that our analysis correctly identified the vast majority of Urease the proteins previously known to be regulated in HCC. It is thus reasonable to assume that the newly identified proteins may be involved in the development of hepatocarcinogenesis or are potential markers of HCC. As a cell cycle regulator, CDC27Hs colocalizes
to the centrosome at all stages of the mammalian cell cycle, and to the mitotic spindle. Injection of affinity-purified anti-CDC27Hs antibodies into logarithmically growing HeLa cells caused a highly reproducible cell cycle arrest in metaphase with apparently normal spindle structure . Some studies indicated that CDC27Hs may be involved in the cancer cell growth [15, 16]. The role of CDC27Hs in hepatocarcinogenesis needs further study. ADP/ATP carrier protein (AAC) was found to be up-regulated in a larger series of HCC tissues in this study, but down-regulated in notumorous tissues especially in chronic hepatitis B tissues. AAC is an integral protein present in the inner mitochondrial membrane, which performs the exchange of cytoplasmic and intramitochondrial ADP and ATP.