— Katherine Bell-McGuinn, M.D., Ph.D., joins as chief medical officer — — Company expects to initiate a Phase I clinical trial of its PARG inhibitor ETX-19477 in 2024 — SAN DIEGO–(BUSINESS WIRE)–858 Therapeutics is pleased to announce today that it has named Katherine Bell-McGuinn, M.D., Ph.D., as Chief Medical Officer. The addition of Dr. Bell-McGuinn…