Inhibition of tumor growth and metastasis dorsal treated with jara toxins and jari. C57/Bl6J mice were administered via subcutaneous with B16F10 melanoma cells pretreated with 0.8 μM jara, 0.2 μM jari, and with untreated cells (control group). The growth curve (A) and macroscopic aspect of the melanoma dorsal tumor of the control and treated groups (B) are shown, as well as the Kaplan-Meier survival curve (C), metastasis multiplicity (D) and cell cycle phase of lung metastasis (E). Pre-treatment of tumor cells in vitro with jara or jari reduced the dorsal tumor volume of B16F10 melanoma cells, with statistically significant increase in survival rates with p < 0.05 (Log rank p < 0.018). The number of nodules in lung parenchyma was reduced on jara and jari groups. The distribution of cell cycle phase showed increase of tumor cells in sub-G1, fragmented DNA and decreased number of cells in proliferative response arrest in G2/M, caused by jara and jari on metastasis lung.