As developers in the oft-troubled TIGIT class forge onward, Roche Holding AG’s Genentech unit provided an unfavorable update July 5 on the phase II/III Skyscraper-06 study testing anti-TIGIT candidate tiragolumab plus Tecentriq (atezolizumab) and chemotherapy vs. Keytruda (pembrolizumab, Merck & Co. Inc.) and chemo as first-line treatment for non-squamous non-small-cell lung cancer (NSCLC).