Kite shows data from ZUMA-3 Study of KTE-C19 in patients with certain Acute Lymphoblastic Leukemia

With a minimum of eight weeks of follow-up, 71 percent of ALL patients (n=17/24) who received a single infusion of KTE-C19 achieved complete tumor remission (complete remission (CR) or CR with incomplete hematological recovery). The ZUMA-3 study results were presented in an oral session at the Annual Meeting of the American Society of Hematology (ASH) in Atlanta.

ALL is an aggressive type of blood cancer which can also involve the lymph nodes, spleen, liver, central nervous system and other organs.

“Approximately half of new ALL cases occur in adults age 20 or older and a majority of adult ALL patients relapse and have poor subsequent outcomes,” said Bijal Shah, MD, ZUMA-3 investigator and medical oncologist, Moffitt Cancer Center, Tampa, Fla. “The deep remissions seen with these early study results offer promise that adults with this aggressive disease may benefit from personalized cell therapy with KTE-C19. Pending further clinical evaluation, this has the potential to be an advance for adults with no other treatment options.”

ZUMA-3 is an ongoing multicenter Phase 1/2 study in patients with ALL whose disease is refractory to or has relapsed following standard chemotherapy or hematopoietic stem cell transplantation. The objectives of the study are to evaluate the safety and efficacy of KTE-C19 in this patient population.

At the time of data cutoff, 24 patients were evaluable for response. KTE-C19 demonstrated a 71 percent (n=17/24) rate of complete remission, with 100 percent of responders having no detectable minimal residual disease, including in those with high tumor burden and high risk genetic abnormalities.

In the safety analysis of 29 patients, adverse events were consistent with the known toxicities of CD19 CAR T treatment, including Grade 3 or higher cytokine release syndrome (CRS) and neurologic toxicities in 28 percent (n=8/29) and 52 percent of patients (n=15/29), respectively. Two patients receiving KTE-C19 died due to adverse events, including one patient with a cerebrovascular accident not related to KTE-C19 treatment approximately seven weeks after treatment and a previously reported patient who experienced fatal CRS.

“We believe personalized cell therapy has the potential to become a cornerstone of cancer treatment and are rapidly advancing CAR T studies in ALL and in other cancers,” said David Chang, MD, PhD, Worldwide Head of Research and Development and Chief Medical Officer at Kite. “ZUMA-3 is reflective of our continued commitment to cell therapy cancer treatment and we are pleased to see these early results for people living with ALL.”

KTE-C19 for ALL is investigational and has not been proven safe or efficacious.