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Rovalpituzumab tesirine
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    Rovalpituzumab tesirine

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    Rovalpituzumab tesirine
    Monoclonal antibody
    Type Whole antibody
    Source Humanized
    Target DLL3
    Clinical data
    ATC code
    • None
    Identifiers
    CAS Number
    ChemSpider
    • none
    UNII
    KEGG
    Chemical and physical data
    Formula C6416H9894N1698O2028S46 (non-glycosylated)

    Rovalpituzumab tesirine (Rova-T) is an experimental antibody-drug conjugate targeting the protein DLL3 on tumor cells. It was originally developed by Stemcentrx and was purchased by AbbVie. It was tested for use in small-cell lung cancer, but development was terminated after unsuccessful phase III trial.

    Development

    In 2018, an Independent Data Monitoring Committee found that in the TAHOE phase III trial, Rova-T shortened survival of lung cancer patients compared to SOC chemotherapy topotecan, prompting termination of trial enrollment. Another phase III trial (MERU) demonstrated no survival benefit over placebo. A phase II trial using the drug as a third-line treatment for relapsed or refractory lung cancer showed objective response rate at just 16%.

    Chemical structure

    Tesirine skeletal.svg

    Chemical structure of "tesirine" (drawn in black). It consists of a pyrrolobenzodiazepine type dimer (top), which is the actual anti-cancer agent, a ValAla structure that can be cleaved by an enzyme to detach the anti-cancer agent from the antibody, a polyethylene glycol spacer, and a maleimide linker which is attached to a cysteine in the antibody's (rovalpituzumab's) peptide backbone, drawn blue. Each rovalpituzumab molecule has an average of two such attachments.

    See also


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