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Water extract of Hedyotis Diffusa Willd suppresses proliferation of human HepG2 cells and potentiates the anticancer efficacy of low-dose 5-fluorouracil by inhibiting the CDK2-E2F1 pathway

  • Authors:
    • Xu-Zheng Chen
    • Zhi-Yun Cao
    • Tuan-Sheng Chen
    • You-Quan Zhang
    • Zhi-Zhen Liu
    • Yin-Tao Su
    • Lian-Ming Liao
    • Jian Du
  • View Affiliations / Copyright

    Affiliations: Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350108, P.R. China, Agricultural Product Quality Institute, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R. China, The Second Affiliated Hospital, Fujian University of Traditional Chinese Medicine, Fuzhou 350003, P.R. China, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P.R. China
  • Pages: 742-748
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    Published online on: May 25, 2012
       https://doi.org/10.3892/or.2012.1834
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Abstract

Hedyotis Diffusa Willd (HDW), a Chinese herbal medicine, has been widely used as an adjuvant therapy against various cancers, including hepatocellular carcinoma (HCC). However, the underlying anticancer mechanisms are yet to be elucidated. In the present study, the anticancer effects of HDW were evaluated and the efficacy and safety of HDW combined with low-dose 5-fluorouracil (5-FU) were investigated. HepG2 cells were cultured in vitro and nude mouse xenografts were established in vivo. The proliferation of HepG2 cells was measured using the MTT method and flow cytometry. The mRNA and protein expression levels of cyclin-dependent kinase 2 (CDK2), cyclin E and E2F1 were examined using relative quantitative real-time PCR and western blot analysis, respectively. The results showed that water extract of HDW remarkably inhibited HepG2 cell proliferation in a dose-dependent manner via arrest of HepG2 cells at the G0/G1 phase and induction of S phase delay. This suppression was accompanied by a great decrease of E2F1 and CDK2 mRNA expression. In addition, HDW remarkably potentiated the anticancer effect of low-dose 5-FU in the absence of overt toxicity by downregulating the mRNA and protein levels of CDK2, cyclin E and E2F1. Our findings support the use of HDW as adjuvant therapy of chemotherapy and suggest that HDW may potentiate the efficiency of low-dose 5-FU in treating HCC.
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Copy and paste a formatted citation
Spandidos Publications style
Chen X, Cao Z, Chen T, Zhang Y, Liu Z, Su Y, Liao L and Du J: Water extract of Hedyotis Diffusa Willd suppresses proliferation of human HepG2 cells and potentiates the anticancer efficacy of low-dose 5-fluorouracil by inhibiting the CDK2-E2F1 pathway. Oncol Rep 28: 742-748, 2012.
APA
Chen, X., Cao, Z., Chen, T., Zhang, Y., Liu, Z., Su, Y. ... Du, J. (2012). Water extract of Hedyotis Diffusa Willd suppresses proliferation of human HepG2 cells and potentiates the anticancer efficacy of low-dose 5-fluorouracil by inhibiting the CDK2-E2F1 pathway. Oncology Reports, 28, 742-748. https://doi.org/10.3892/or.2012.1834
MLA
Chen, X., Cao, Z., Chen, T., Zhang, Y., Liu, Z., Su, Y., Liao, L., Du, J."Water extract of Hedyotis Diffusa Willd suppresses proliferation of human HepG2 cells and potentiates the anticancer efficacy of low-dose 5-fluorouracil by inhibiting the CDK2-E2F1 pathway". Oncology Reports 28.2 (2012): 742-748.
Chicago
Chen, X., Cao, Z., Chen, T., Zhang, Y., Liu, Z., Su, Y., Liao, L., Du, J."Water extract of Hedyotis Diffusa Willd suppresses proliferation of human HepG2 cells and potentiates the anticancer efficacy of low-dose 5-fluorouracil by inhibiting the CDK2-E2F1 pathway". Oncology Reports 28, no. 2 (2012): 742-748. https://doi.org/10.3892/or.2012.1834
Copy and paste a formatted citation
x
Spandidos Publications style
Chen X, Cao Z, Chen T, Zhang Y, Liu Z, Su Y, Liao L and Du J: Water extract of Hedyotis Diffusa Willd suppresses proliferation of human HepG2 cells and potentiates the anticancer efficacy of low-dose 5-fluorouracil by inhibiting the CDK2-E2F1 pathway. Oncol Rep 28: 742-748, 2012.
APA
Chen, X., Cao, Z., Chen, T., Zhang, Y., Liu, Z., Su, Y. ... Du, J. (2012). Water extract of Hedyotis Diffusa Willd suppresses proliferation of human HepG2 cells and potentiates the anticancer efficacy of low-dose 5-fluorouracil by inhibiting the CDK2-E2F1 pathway. Oncology Reports, 28, 742-748. https://doi.org/10.3892/or.2012.1834
MLA
Chen, X., Cao, Z., Chen, T., Zhang, Y., Liu, Z., Su, Y., Liao, L., Du, J."Water extract of Hedyotis Diffusa Willd suppresses proliferation of human HepG2 cells and potentiates the anticancer efficacy of low-dose 5-fluorouracil by inhibiting the CDK2-E2F1 pathway". Oncology Reports 28.2 (2012): 742-748.
Chicago
Chen, X., Cao, Z., Chen, T., Zhang, Y., Liu, Z., Su, Y., Liao, L., Du, J."Water extract of Hedyotis Diffusa Willd suppresses proliferation of human HepG2 cells and potentiates the anticancer efficacy of low-dose 5-fluorouracil by inhibiting the CDK2-E2F1 pathway". Oncology Reports 28, no. 2 (2012): 742-748. https://doi.org/10.3892/or.2012.1834
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