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  • Title: [Expression of ERK5 in multidrug-resistant hepatocellular carcinoma cell line].
    Author: Yan F, Wang XM, Pan C.
    Journal: Nan Fang Yi Ke Da Xue Xue Bao; 2009 Mar; 29(3):483-6. PubMed ID: 19304531.
    Abstract:
    OBJECTIVE: To detect the expression of extracellular-signal regulated protein kinase 5 (ERK5) in multidrug-resistant hepatocellular carcinoma cell lines hepG2/ADM and BEL-7402/5-FU and in the parental cell lines (hepG2 and BEL-7402), and study the role of ERK5 in multidrug resistance of hepatocellular carcinoma. METHODS: MTT assay was used to determine the multidrug resistance (MDR) of hepG2/ADM and BEL-7402/5-FU cells. Real-time PCR and Western blotting were used to detect the expression of ERK5 at mRNA and protein levels in the 4 cell lines. RESULTS: The resistance indices to ADM, 5-FU, and CDDP was 12.34, 5.74, and 3.81 in hepG2/ADM cells, and the resistance indices to 5-FU, VCR, OHP, MTX, and ADM was 15.32, 10.08, 5. 85, 6.74 and 3.26 in BEL-7402 cells, respectively. Compared with those in hepG2 and BEL-7402 cells, the ERK5 gene was up-regulated at both mRNA and protein levels in HepG2/ADM cells, but down-regulated at the mRNA level and up-regulated at the protein level in BEL-7402/5-FU cells. CONCLUSIONS: ERK5 is related to multidrug resistance in HepG2/ADM and BEL-7402/5-FU cells, and may provide new clues for reversing multidrug resistance of hepatocellular carcinoma cells.
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