[Transplacental blastomogenic effect of p-hydroxyphenyl lactic acid].

Transplacental administration of tyrosine metabolite p-hydroxyphenyl lactic acid having blastomogenic activity induced development of malignant and benign neoplasms (leukemias and lymphosarcomas, adenomas and pulmonary carcinoma, hepatomas, papillomas, and cancer of the urinary bladder and other tumours) in progeny of CC57BR and C57BL mouse strains, in 88 and 78% of cases, respectively. The number of neoplasms was significantly higher, than in the control, they appeared earlier and were of more malignant character. The role of endogenous blastomogenic substances in the development of leukemias in the newborn and yound children is discussed.