Reduced folate carrier gene silencing in multiple antifolate-resistant tumor cell lines is due to a simultaneous loss of function of multiple transcription factors but not promoter methylation.
J Biol Chem. 2004 Jan 2;279(1):374-84. doi: 10.1074/jbc.M309092200. Epub 2003 Oct 9.
J Biol Chem. 2004.
PMID: 14551190