ArticleMolecular cancer therapeutics2026
Humanized antibody-drug conjugates for Somatostatin receptor 2 (SSTR2)-positive tumor treatment.
Article in Molecular cancer therapeutics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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10 authors.
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Abstract
Somatostatin receptor 2 (SSTR2) is overexpressed in neuroendocrine tumors (NETs) and meningiomas. The objective of this study was to develop an SSTR2-targeted therapy to treat both tumors. We developed a humanized anti-SSTR2 monoclonal antibody demonstrating strong cancer cell binding, internalization in cancer cells, and tumor specificity, as evidenced by flow cytometry, confocal microscopy, and live-animal imaging. Antibody-drug conjugates were generated by conjugating the SSTR2 mAb with potent payloads, including monomethyl auristatin F or mertansine. In vitro assessments revealed high cytotoxicity across NET subtypes and meningioma cell lines. In vivo efficacy was confirmed in two mouse models, i.e. subcutaneous NET xenografts and intracranial meningioma xenografts, where treatment inhibited proliferation, induced apoptosis and cell death, exhibited minimal toxicity, and extended survival. The mechanism of action was further elucidated through bulk RNA sequencing after treatment. These findings highlight the therapeutic potential of our humanized SSTR2 mAb for targeted payload delivery in NETs and meningiomas.
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