TIGIT blockade restores anti-tumor function of tumor exposed quiescent NK cells

Johns Hopkins researchers used mouse ex vivo K14+ breast cancer organoid model to study the effect of tumor exposure to NK cells. teNK cells were found to lose cytotoxicity and to promote metastesis. This effect could be overcome by blockade with anti-TIGIT or anti-KRLG antibodies, both of which are promising immune checkpoints for Cancer therapy. […]

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A Lipopeptide Nasal Spray inhibits SARS-CO-V2 infection in Ferrets

Nasal spray contains a cholesterol linked lipopeptide which binds to the S2 region of SARS-CO-V2 spike in proximity to the HR2 domain. This prevents it from contracting towards the HR1 domain and therby inhibits cell fusion and infection. “Intranasal fusion inhibitory lipopeptide prevents direct contact SARS-CoV-2 transmission in ferrets” Rory D. de Vries, Matteo Porotto,

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anti-CD137 stimulates anti-tumor response

anti-CD137 (4-1BB) agonistic mAb alone improves tumor infiltration and anti-tumor response in mice. Intratumoral Activation of 41BB Costimulatory Signals Enhances CD8 T Cell Expansion and Modulates Tumor-Infiltrating Myeloid Cells” Patrick Innamarato, Shari Pilon-Thomas, et al. (Oct 2020) J Immunol October 5, 2020, ji2000759; DOI: https://doi.org/10.4049/jimmunol.2000759. Related Ancell Products anti-human CD137 mAb clone 4B4-1    

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Chemical inhibitor of nSMase2 prevents EV release

“A novel and potent brain penetrant inhibitor of extracellular vesicle release” Camilo Rojas, Barbara Slusher, et al. 2019 Brit J Pharmacology 176: 3857-70. Doi: 10.1111/bph.14789. Using high throughput screening of 365,000 compounds, this research group from Johns Hopkins identified “PDDC”, a compound which penetrated brain tissue and inhibited release of murine astrocyte-derived EVs. Ancell anti-human

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CD47-SIRPalpha Blockade enhances Neutrophil Trogocytosis of tumor

Neutrophils enact lysis of antibody opsonized target tumor cells by utilizing the CD11b – CD18 interaction to form a cytotoxic synapse which leads to trogocytosis.  This process can be effectively blocked by blockade with either anti-CD11b or anti-CD18 mAbs, but is enhanced when SIRPa – CD47 blockade is employed. “Neutrophils Kill Antibody Opsonized Cancer Cells

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