Adjuvant Oral Recombinant Methioninase Inhibits Lung Metastasis in a Surgical Breast-Cancer Orthotopic Syngeneic Model.
2020
Background/aim In the present study, we evaluated the efficacy of adjuvant administration of oral recombinant methioninase (o-rMETase) against recurrence and metastasis in a 4T1 murine breast-cancer syngeneic model. Materials and methods 4T1 cells were orthotopically implanted into the 2nd mammary fat pad of BALB/c mice. The 4T1 orthotopic syngeneic models were randomized into 2 groups after primary tumor resection: untreated control and o-rMETase (100 units, oral, daily, 2 weeks). Results The frequency and extent of local recurrence were reduced by o-rMETase. The number of individual cancer cells and metastatic nodules on the lung surface was significantly lower in the o-rMETase-treated mice than the untreated control mice. Conclusion Adjuvant o-rMETase inhibited local recurrence and lung metastasis after primary tumor resection.
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