RP2/RP3 in Combination With Atezolizumab and Bevacizumab for the Treatment of Patients With CRC

RP2 and RP3 are selectively replication competent herpes simplex viruses 1 (HSV-1) that express exogenous genes (RP2: GM-CSF, GALV, and anti-CTLA-4; RP3: GALV, and anti-CTLA-4 hCD40L, and h4-1BBL) intended for direct injection into suitable nonneurological solid tumors. They are genetically engineered to provide direct oncolytic tumor destruction combined with the induction of a systemic antitumor immune response. This study will evaluate whether the use of oncolytic immunotherapy, either with RP2 or RP3, can provide meaningful efficacy in combination with an anti-PD-L1 therapy (atezolizumab) and anti-VEGF therapy (bevacizumab) in patients with advanced MSS and pMMR CRC.