Potential utility of antineoplaston A-10 levels in breast cancer.

Antineoplastons, first described by Burzynski, are naturally occurring peptides and amino acid derivatives, which control neoplastic growth. Antineoplaston A-10 (3-phenylacetyl amino-2, 6-pepridinedione) is the first chemically identified antineoplaston. Here we describe the potential utility of antineoplaston A-10 as a predictive test for breast cancer. Antineoplaston A-10 level was measured in the urine of 31 breast cancer patients and 17 normal women using high performance thin layer chromatography (HPTLC). Significantly lower antineoplaston A-10 levels were detected among patients with breast cancer with a P value <0.001. These data suggest a strong inverse association of urinary antineoplaston A-10 level with breast cancer. Such finding was the stimulus for further investigations of antineoplaston A-10 levels in some benign as well as other malignant diseases to determine the utility of this approach as a predictive test for women who are at risk of developing breast cancer.