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Anti-CD99 scFv-ELP nanoworms for the treatment of acute myeloid leukemia.


ABSTRACT: CD99 is a transmembrane glycoprotein shown to be upregulated in various malignancies. We have previously reported CD99 to be highly upregulated and present a viable therapeutic target in acute myeloid leukemia (AML). Currently, no therapy against CD99 is under clinical investigation. As a surface molecule, CD99 can be targeted with an antibody-based approach. Here, we have developed a new modality to target CD99 by engineering a fusion protein composed of a single-chain variable fragment antibody (anti-CD99 scFv) conjugated with a high molecular weight elastin-like polypeptide (ELP), A192: α-CD99-A192. This fusion protein assembles into multi-valent nanoworm with optimal physicochemical properties and favorable pharmacokinetic parameters (half-life: 16 h). α-CD99-A192 nanoworms demonstrated excellent in vitro and in vivo anti-leukemic effects. α-CD99-A192 induced apoptotic cell death in AML cell lines and primary blasts and prolonged overall survival of AML xenograft mouse model.

SUBMITTER: Vaikari VP 

PROVIDER: S-EPMC7508895 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature

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Anti-CD99 scFv-ELP nanoworms for the treatment of acute myeloid leukemia.

Vaikari Vijaya Pooja VP   Park Mincheol M   Keossayan Lena L   MacKay J Andrew JA   Alachkar Houda H  

Nanomedicine : nanotechnology, biology, and medicine 20200612


CD99 is a transmembrane glycoprotein shown to be upregulated in various malignancies. We have previously reported CD99 to be highly upregulated and present a viable therapeutic target in acute myeloid leukemia (AML). Currently, no therapy against CD99 is under clinical investigation. As a surface molecule, CD99 can be targeted with an antibody-based approach. Here, we have developed a new modality to target CD99 by engineering a fusion protein composed of a single-chain variable fragment antibod  ...[more]

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