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Home » Safety concerns hit Mersana shares as company plans for next steps
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Safety concerns hit Mersana shares as company plans for next steps

Sep. 10, 2021
By Michael Fitzhugh
Shares of antibody drug conjugate developer Mersana Therapeutics Inc. (NASDAQ:MRSN) fell 39.1% to $8.56 on Sept. 10 after the company disclosed a second death from pneumonitis in the ongoing phase I trial testing its antibody drug conjugate, upifitamab rilsodotin against tumor types likely to express the sodium-dependent phosphate transport protein NaPi2b, such as ovarian cancer.
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