Drugs /
tnb-383b
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Overview
NCI Definition [1]:
A T-cell engaging bispecific antibody (T-BsAb) directed against the tumor-associated antigen (TAA) human alpha B-cell maturation antigen (aBCMA) and against the alphaCD3 (aCD3) antigen found on T-lymphocytes, with potential immunostimulating and antineoplastic activities. TNB-383B is composed of two aBCMA moieties in sequence on one arm, a single aCD3 arm, and a silenced IgG4 Fc. Upon administration of anti-aBCMA/aCD3 T-cell engaging bispecific antibody TNB-383B, this bispecific antibody binds to both CD3 on cytotoxic T-lymphocytes (CTLs) and BCMA found on BCMA-expressing tumor cells. This activates and redirects CTLs to BCMA-expressing tumor cells, which results in the CTL-mediated cell death of BCMA-expressing tumor cells. BCMA, a member of the tumor necrosis factor receptor superfamily that is specifically overexpressed on malignant plasma cells, plays a key role in promoting plasma cell survival. Binding to aCD3 preferentially activates effector over regulatory T-cells and stimulates minimal cytokine release.
Clinical Trials
Tnb-383b has been investigated in 1 clinical trial, of which 1 is open and 0 are closed. Of the trial investigating tnb-383b, 1 is phase 1 (1 open).
Multiple myeloma is the most common disease being investigated in tnb-383b clinical trials [2].
References
1. National Cancer Institute. NCI Thesaurus Version 18.11d. https://ncit.nci.nih.gov/ncitbrowser/. [2018-07-30] [2018-08-02].
2. All assertions and clinical trial landscape data are curated from primary sources. You can read more about the curation process here.
