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[Inhibitory effect of human lactoferrin (neolactoferrin) on the growth of transplantable tumor in the uterine cervix of mice].

There was studied effect of recombinant form of human breast milk component-lactoferrin, received from milk of goats-producers (neolactoferrin), on growth of transplantable tumor of the cervix in mice (TTC-5). Neolactoferrin in dose of 100 mg/kg and 200 mg/kg of animals' mass inhibited the rate of tumor growth. The most effective was the dose of 200 mg/kg, which was entered a week before transplantation. In contrast to the control group, in groups where neolactoferrin was entered it was fixed resorption of TTC-5 in 6 mice. Repeated transplantation TTC-5 to these mice led to reducing of the rate of tumor growth and increasing of duration of their lives. To investigate if tumor-braking effect neolactoferrin connected with direct effect on the tumor or due to the general effect of the organism, TTC-5 cells were transformed in culture and they were exposed by neolactoferrin in dose of 10 and 100 mkg/ml. In investigated doses neolactoferrin did not influence on tumor cells growth. There is discussed possible mechanism of anti-tumor effect of neolactoferrin.