The narrative of TIGIT-targeting immunotherapy development, beset by negative news in recent months, has found a positive plotline again, thanks to what Roche Holding AG referred to as “an inadvertent disclosure” of a second interim analysis from the phase III Skyscraper-01 study testing anti-TIGIT candidate tiragolumab with anti-PD-L1 antibody Tecentriq (atezolizumab) in non-small-cell lung cancer.
While new data from Arcus Biosciences Inc. and Gilead Sciences Inc. didn't do much to calm an unsteady development corridor, researcher, developers and analysts still hold out hope for the TIGIT pathway. The Arcus-Gilead randomized phase II study combining anti-TIGIT domvanalimab and anti-PD1 antibodies for treating first-line, metastatic non-small-cell lung cancer produced positive results, including improvements in median progression-free survival (PFS) and six-month landmark PFS rates vs. monotherapy. But a hefty dent in Arcus' shares provide a reminder of TIGIT’s fragility as a field, and a reminder of the phase III failure in May for Roche Holding AG unit Genentech Inc.'s anti-TIGIT immunotherapy tiragolumab, which dragged down the share value of several other class entrants. Arcus stock (NASDAQ:RCUS) dipped deeply on Dec. 20 on the new data’s release, but rallied on Dec. 21 by closing 7.5% upward at $22.15 each.
A phase III failure for Roche Holding AG unit Genentech Inc.'s anti-TIGIT immunotherapy tiragolumab dragged down the share value of several other class entrants.
A phase III failure for Roche Holding AG unit Genentech Inc.'s anti-TIGIT immunotherapy tiragolumab dragged down the share value of several other class entrants.
Roche Holding AG’s attempt to find a next-generation cancer immunotherapy has suffered a setback after the first phase III readout for an anti-TIGIT drug, tiragolumab, turned out negative. With big pharma investing heavily in TIGIT (T-cell immunoreceptor with immunoglobulin and ITIM domains), results from the company’s Skyscraper-02 trial were closely watched.
Bolstered by the success of CTLA4 and PD-(L)1 antibodies, companies are exploring new targets to encourage the immune system to attack tumors. "While these agents have demonstrated efficacy in a proportion of cancer patients, there clearly is room for improvement to lift the tail of the curve," Michele Teng, associate professor at the QIMR Berghofer Medical Research Institute, told the audience at the clinical trials plenary session of the American Association for Cancer Research Virtual Annual Meeting II, where researchers presented data from a pair of immunotherapies looking to build on the success targeting PD-(L)1.
A key opinion leader (KOL) consulted by SVB Leerink deemed Roche Holding AG’s anti-TIGIT drug results “really huge” and “quite amazing,” affirming the Basel, Switzerland-based firm’s lead in the field. The phase II data from the study known as Cityscape rolled out at the virtual American Society of Clinical Oncology (ASCO) meeting.