RBN-2397 in Combination With Pembrolizumab in Patients With SCCL

Summary

RBN-2397 inhibits PARP7, an enzyme that is switched on by cancer stresses, such as the toxins in cigarette smoke. Cancer cells use PARP7 to hide from the immune system by stopping the cell from sending a signal (Type 1 interferon) that tells the immune system that something is wrong and to kill the cell. RBN-2397 has been shown in animal and human studies to inhibit tumor growth and also shuts down the "don't kill me" signal the tumor is sending to evade the immune system. The purpose of this study is to determine if RBN-2397 in combination with pembrolizumab (a PD-1 inhibitor) has the ability to restore the response to treatment in patients with SCCL that have been previously treated with a PD-1/PD-1 ligand (PD-L1) inhibitor and have had a response followed by disease progression. The Phase 1b portion of the study will assess the safety of RBN-2397 in combination with pembrolizumab (a PD-1 inhibitor) and define the dose of RBN-2397 to be used in combination with pembrolizumab for the Phase 2. The Phase 2 portion of the study will assess the anti-tumor activity of RBN-2397 in combination with pembrolizumab.

Timeline

Start

2022-03-15

Primary completion

2023-11

Completion

2023-12

Publications

• Background Cohen MS, Chang P. Insights into the biogenesis, function, and regulation of ADP-ribosylation. Nat Chem Biol. 2018 Feb 14;14(3):236-243. doi: 10.1038/nchembio.2568.
• Background Gozgit JM, Vasbinder MM, Abo RP, Kunii K, Kuplast-Barr KG, Gui B, Lu AZ, Molina JR, Minissale E, Swinger KK, Wigle TJ, Blackwell DJ, Majer CR, Ren Y, Niepel M, Varsamis ZA, Nayak SP, Bamberg E, Mo JR, Church WD, Mady ASA, Song J, Utley L, Rao PE, Mitchison TJ, Kuntz KW, Richon VM, Keilhack H. PARP7 negatively regulates the type I interferon response in cancer cells and its inhibition triggers antitumor immunity. Cancer Cell. 2021 Sep 13;39(9):1214-1226.e10. doi: 10.1016/j.ccell.2021.06.018. Epub 2021 Jul 22.

Drugs

Indications