MacroGenics Announces Partial Clinical Hold on MGD009 Phase 1 Studies

MacroGenics, Inc. (NASDAQ: MGNX), a clinical-stage biopharmaceutical company focused on discovering and developing innovative monoclonal antibody-based therapeutics for the treatment of cancer, today announced that on December 6, it received a letter from the U.S. Food and Drug Administration (FDA) indicating that a partial clinical hold has been placed on its Phase 1 monotherapy study of MGD009, a B7-H3 × CD3 bispecific DART® molecule, as well as on a combination study of MGD009 and MGA012 (anti-PD-1). Under the partial clinical hold, no new patients will be enrolled in either study until the partial hold is lifted by the FDA. Current study participants may continue to receive drug at their pre-assigned dose.

The partial clinical hold was initiated following MacroGenics’ reporting of hepatic adverse events on the MGD009 monotherapy trial to the FDA, including reversible elevations of transaminases with or without concurrent elevations of bilirubin. Although these events have been otherwise uncomplicated and short-lived in duration, MacroGenics also communicated to the FDA the company’s plans to amend the existing MGD009 studies with additional supportive care to mitigate these events. The FDA has placed the trials on partial clinical hold, pending review of additional details regarding these events, and satisfactory review of the planned amendments to the monotherapy and combination study protocols and related documents. MacroGenics will be working closely with the FDA to review these events and seek to resolve this clinical hold.

“MacroGenics’ top concern in conducting clinical trials is the safety of study participants,” said Scott Koenig, M.D., Ph.D. “As we’ve identified to the FDA, we believe that transaminitis observed in patients administered MGD009 was likely a cytokine-mediated event. We are working with the FDA and will provide an update when we have additional information. This partial clinical hold does not impact ongoing clinical studies for enoblituzumab and MGC018, our other B7-H3-targeted molecules.”

https://www.marketscreener.com/MACROGENICS-INC-14484280/news/MacroGenics-Announces-Partial-Clinical-Hold-on-MGD009-Phase-1-Studies-27723898/