Abstract
Neopterin, biopterin, pterin, 6-hydroxymethylpterin and isoxanthopterin were determined in the supernatants of various animal cell cultures. The different cell lines showed distinct variations in the concentrations as well as in the pattern and total amount of the released pterins. In cells from the same organ but from diverse species differences in pattern and release were found. Cell lines derived from primates had a high release of neopterin. A further difference resulted from the origin of fetal or adult organs. Neoplastic cell lines showed different patterns of pterins, dependent on the type of tumour. Primary cultures from embryonic bovine lung had the highest total amount of released pterins in all cell lines examined.
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