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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Folate conjugase activity in the plasma and tumors of breast-cancer patients.

The activity of folate conjugase (pteroylpolyglutamate hydrolase, EC 3.4.22.12) was measured in plasma from normal subjects and patients with breast cancer using pteroylglutamyl-gamma-glutamyl-gamma-(U14C) glutamate as the substrate. Conjugase assays also were performed on samples of breast-tumor tissue, normal breast, and fibroadenoma. When assayed at pH 4.5 and 7.4, mean plasma conjugase activity was significantly (p less than 0.05) elevated in a group of patients with anatomically proven metastatic disease (n = 21) when compared with control subjects (n = 12) and a group of patients (n = 13) with no clinical evidence of disease after mastectomies. Mean plasma conjugase activity assayed at pH 4.5 also was significantly higher in the metastatic disease group when compared with breast cancer patients before mastectomy (n = 9) and fibroadenoma patients before biopsy (n = 3). The specific activity of tissue conjugase assayed at pH 4.5 was significantly higher (p less than or equal to 0.05) in infiltrating ductal carcinoma than in normal adjacent breast tissue according to the Wilcoxon test for paired samples (n = 10).[1]

References

  1. Folate conjugase activity in the plasma and tumors of breast-cancer patients. Baggott, J.E., Heimburger, D.C., Krumdieck, C.L., Butterworth, C.E. Am. J. Clin. Nutr. (1987) [Pubmed]
 
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