Dosages of immunoconjugates of antibodies and SN-38 for improved efficacy and decreased toxicity
The present invention relates to therapeutic immunoconjugates comprising SN-38 attached to an anti-Trop-2 antibody or antigen-binding antibody fragment. In preferred embodiments, the antibody may be an hRS7 antibody. The methods and compostions are of use to treat Trop-2 expressing cancers in human patients, preferably in patients who are resistant to or relapsed from at least one prior anti-cancer therapy, more preferably in patients who are resistant to or relapsed from treatment with irinotecan. The immunoconjugate may be administered at a dosage of 3 mg/kg to 18 mg/kg, preferably 8 to 12 mg/kg, more preferably 8 to 10 mg/kg. When administered at specified dosages and schedules, the immunoconjugate can reduce solid tumors in size and reduce or eliminate metastases. Preferred tumors to treat with the subject immunoconjugates include triple-negative breast cancer, HER+, ER+, progesterone+ breast cancer, metastatic non-small-cell lung cancer, a metastatic small-cell lung cancer and metastatic pancreatic cancer.
Govindan; Serengulam V. (Summit, NJ), Goldenberg; David M. (Mendham, NJ)
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