EN
The article describes the possibility of using melatonin in cases of neoplastic diseases in animals. Most observational studies show an association between melatonin and cancer in animals and humans. The mechanisms by which melatonin may act in this way have not been fully elucidated. The oncostatic action of melatonin in mammary cancer, as well as in uterine and prostate cancer, may result from the modulating effect on the enzymes involved in the local synthesis of estrogens. Many biological effects of melatonin, including antitumor activity, are caused by the activation of membrane receptors (MT1 and MT2), connected with regulatory proteins (G proteins). Other possible anti-cancer mechanisms include anti-angiogenic activity, anti-inflammatory activity, protection from oxidative damage, and immunostimulation. Many studies confirm the efficacy and safety of melatonin in cancer treatment. Melatonin can be used with chemotherapy in animals not only to support the action of anticancer drugs, but also to reduce their toxicity.