The activity of tiragolumab-containing regimens appeared similar to that of atezolizumab plus chemotherapy in randomised phase III trials in early-stage and advanced TNBC. The safety profile of all three regimens was consistent with previous experience of similar regimens in other tumour types and with symptoms of the underlying disease.
8 days ago
P1 data • Journal
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PD-L1 (Programmed death ligand 1) • TIGIT (T Cell Immunoreceptor With Ig And ITIM Domains 2)
In addition, the shed ectodomain of TIGIT maintains binding to CD155 and the tested clinical anti-TIGIT antibody, tiragolumab. Given the significant anti-TIGIT failures, these unexpected findings reveal potential saturation vulnerabilities of macaque CD155 and preclinical TIGIT antibodies by soluble shedded TIGIT ectodomain, contrary to the intended mechanism of action on the lymphocyte membrane. These results caution against extrapolation and question the suitability of cynomolgus and rhesus macaques for preclinical safety and dose estimation of TIGIT-targeted therapies.
12 days ago
Journal
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TIGIT (T Cell Immunoreceptor With Ig And ITIM Domains 2) • PVR (PVR Cell Adhesion Molecule)
Clinical trials, particularly with the monoclonal antibody tiragolumab combined with PD-1/PD-L1 inhibitors, show promising synergistic effects...While phase III data remain limited, biomarker-driven, well-designed trials are essential. If validated, TIGIT blockade could become a key addition to immuno-oncology treatment strategies for NSCLC.