We have studied anti-tumor properties of bone marrow derived peptide Phe-Leu-Gly-Phe-Pro-Thr (MP-1) synthesized by classical methods. It was shown that MP-1 enhanced the effect ofcytostatic therapy of lymphatic leukemia P388 and increased latent growth period of P388 tumors implanted in irradiated mice. MP-1 also decreased metastasis of mouse breast adenocarcinoma Ca-755 after surgery.
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