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High expression of epidermal growth factor receptor (EGFR) is thought to be correlated with cell proliferation, invasion, metastasis, resistance to chemoradiotherapy, and poor prognosis in various kinds of human cancers. Blockade of EGFR signal transduction can be a promising strategy for cancer...
We first investigated the cytotoxicity of three cycloartane triterpenoids isolated from the aerial part of C. dahurica . Their cytotoxic activity was investigated on several cancer cell lines including solid tumor (HepG2), blood tumor (HL-60), drug resistant tumor (R-HepG2) and primary cultured...
Unphysiologically high levels of nitric oxide (NO ) are mutagenic and may contribute to carcinogenesis. Proapoptotic and anitiapoptotic functions of NO have been reported in various in vivo and in vitro experimental models. The complexity of biological responses induced is a consequence of the...
Monocrotaline is a representative naturally occurring genotoxic pyrrolizidine alkaloid. Metabolism of monocrotaline by liver microsomes of F344 female rats generated (+/−)6,7-dihydro-7-hydroxy-1-hydroxymethyl-5 H -pyrrolizine (DHP) and monocrotaline-N-oxide as major metabolites. Metabolism in...
In this study, we investigated whether expression of vascular endothelial growth factor (VEGF)-C and/or VEGF-D correlates with clinicopathological features of human gastric carcinoma. We immunohistochemically examined the expression of VEGF-C and VEGF-D in 140 archival surgical specimens of...
A phenolic fraction purified form defatted seeds of Oenothera biennis promoted selective apoptosis of human and mouse bone marrow-derived cell lines following first-order kinetics through a caspase-dependent pathway. In non-leukemia tumour cell lines, such as human colon carcinoma CaCo 2 cells...
Prostaglandin synthase 2 (PTGS2) mediated production of prostaglandins is an important step in the inflammatory response. In a population-based case-cohort study, we investigated the relationship between lung cancer and a polymorphism in PTGS2 at site 8473. Among 54,220 cohort members, 265 lung...
Our recent report indicated that HPV infection may be associated with an increased frequency of p16INK4a promoter hypermethylation to cause p16 inactivation. In this study, we further speculated that the HPV infection may be linked with the expression of DNA methyltransferase (DNMT) protein in...
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