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Mesothelin is a cell surface protein that is an excellent target for immunotherapy because of its limited expression on normal tissues and its high expression on many cancers, including mesothelioma, cholangiocarcinoma, pancreatic, ovarian, lung, stomach, bile duct, and triple-negative breast cancer.
Researchers at the National Cancer Institute’s (NCI) Laboratory of Molecular Biology have isolated two anti-mesothelin single domain antibodies (also known as nanobodies), A101 and G8. These antibodies have been isolated from newly developed camel single domain (VHH) libraries by phage display and have been used to shown to specifically target mesothelin-expressing cell lines with high affinity. Additionally, these mesothelin antibodies can be used as either independent agents or targeting domains in recombinant immunotoxins (RITs), antibody-drug conjugates (ADCs), bispecific antibodies, and chimeric antigen receptors (CARs). Significantly, CARs using these antibodies have shown specific killing activity against mesothelin positive tumors including mesothelioma cell and mouse models, strongly supporting that these candidates may be further developed as therapeutics.
Pre-clinical (in vivo)
Licensing and research collaboration
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