Title : Folate depletion in human lymphocytes up-regulates p53 expression despite marked induction of strand breaks in exons 5-8 of the gene.

Pub. Date : 2007 Jan 10

PMID : 17098465






6 Functional Relationships(s)
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1 Folate depletion in human lymphocytes up-regulates p53 expression despite marked induction of strand breaks in exons 5-8 of the gene. Folic Acid tumor protein p53 Homo sapiens
2 Cells grown in 15 nM folate developed significant levels of p53 strand breaks, reflected by reductions in amplifiable DNA from p53 exons 5-8 (approximately 40% loss, P<0.0001) and exons 7-8 (approximately 26% loss, P<0.0001) compared to 30 and 120 nM. Folic Acid tumor protein p53 Homo sapiens
3 Cells grown in 15 nM folate developed significant levels of p53 strand breaks, reflected by reductions in amplifiable DNA from p53 exons 5-8 (approximately 40% loss, P<0.0001) and exons 7-8 (approximately 26% loss, P<0.0001) compared to 30 and 120 nM. Folic Acid tumor protein p53 Homo sapiens
4 p53 protein abundance increased with decreasing media folate, as did p21 transcript. Folic Acid tumor protein p53 Homo sapiens
5 In primary human lymphocytes, folate depletion induces a marked increase in p53 exons 5-8 breaks, but does not reduce steady-state levels of p53 mRNA, protein, or impair downstream signaling. Folic Acid tumor protein p53 Homo sapiens
6 The induction of p53 strand breaks by folate depletion does not impair p53 expression or action within all human cell lines. Folic Acid tumor protein p53 Homo sapiens