POTENT CONJUGATES AND HYDROPHILIC LINKERS

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United States of America Patent

SERIAL NO

13473974

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Abstract

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Linkers for binding drugs to cell binding agents are modified to hydrophilic linkers by incorporating a polyethylene glycol spacer. The potency or the efficacy of the cell-binding agent-drug conjugates is surprisingly enhanced several folds in a variety of cancer cell types, including those expressing a low number of antigens on the cell surface or cancer cells that are resistant to treatment. A method for preparing maytansinoids bearing a thioether moiety and a reactive group which allows the maytansinoid to be linked to a cell-binding agent in essentially a single step is also provided.

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Patent Owner(s)

Patent OwnerAddress
IMMUNOGEN INCWALTHAM MA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
CHARI, Ravi VJ Newton, US 94 905
SINGH, Rajeeva Framingham, US 33 725
WILHELM, Sharon D Brookline, US 5 136

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