GPT and neoplasm: In the other hand, although the serum levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) as two types of liver function enzymes were similar in test and control groups (data are not shown) but regarding to the result of histopathological study the tumor metastasis into liver of SeNP-enriched L. brevis treated mice was considerably lower than control group which received PBS buffer.