On October 14, 2021 CytRx Corporation (OTCQB: CYTR) ("CytRx" or the "Company"), a specialized biopharmaceutical company focused on research and development for the oncology and neurodegenerative disease categories, highlighted ImmunityBio, Inc.’s (NASDAQ: IBRX) ("ImmunityBio") reported completion of enrollment in its Phase 2 trial studying a combination immunotherapy (Nant Cancer Vaccine) – which includes aldoxorubicin – in advanced metastatic pancreatic cancer (Press release, CytRx, OCT 14, 2021, View Source [SID1234591251]).
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CytRx out-licensed global development, manufacturing and commercialization rights for aldoxorubicin to ImmunityBio in 2017. The Company has an agreement with ImmunityBio that can yield up to $343 million in potential milestone payments as well as prospective royalties on sales of aldoxorubicin.
According to ImmunityBio, the majority of participants in the study to date remain on therapy and 90% (43/48) of the evaluable patients have exceeded the approximately two-month historical survival rate. Of the 48 evaluable patients, 23 (48%) had extremely advanced disease upon enrollment (i.e. had progressed after three to six prior lines of therapy) and, of these patients, 20 out of 23 (87%) have exceeded historical survival rates. On the strength of this early data and significant unmet medical need, ImmunityBio has submitted an amendment to increase enrollment in Cohort C.
Patrick Soon-Shiong, M.D., Founder and Global Chief Scientific and Medical Officer of ImmunityBio, commented:
"Patients with advanced metastatic pancreatic cancer who have failed all standards of care have very grave prognoses with few treatment options. This study was to explore if the Nant Cancer Vaccine could address this unmet need. It is gratifying to note that patients in this study, who had progressed after up to six lines of prior therapy, have exceeded historical survival rates despite having very advanced pancreatic cancer upon enrollment. Achieving robust enrollment in this patient group and early promising efficacy evidence are important milestones in ImmunityBio’s effort to develop this therapeutic with the potential to improve survival rates and provide a replacement for toxic chemotherapy. As the historical survival rate for third- to sixth-line pancreatic cancer patients is approximately two months, we are encouraged by this early data and have decided to open this cohort to more patients with advanced metastatic disease who have no further treatment options."
Steven A. Kriegsman, Chairman and Chief Executive Officer of CytRx, commented:
"With each of our licensing agreements, CytRx’s primary goal is to put greater energy and resources behind innovative clinical programs working to combat cancer and rare diseases. We are highly encouraged by ImmunityBio’s milestone achievement of robust enrollment in its QUILT-88 study and early evidence of promising efficacy of the Nant Cancer Vaccine, which includes our licensed aldoxorubicin drug, to treat severe cases of pancreatic cancer. We look forward to continuing to monitor the trial’s progress when mature data is released in Q1 2022, ahead of ImmunityBio’s plans to meet with the U.S. Food and Drug Administration in 2022 to discuss the path for the approval of combination therapies for pancreatic cancer."
QUILT-88 Study Details
This Phase 2, randomized, three-cohort, open-label study will evaluate the comparative efficacy and overall safety of standard-of-care chemotherapy versus standard-of-care chemotherapy, in combination with PD-L1 t-haNK, Anktiva (N-803), and aldoxorubicin in subjects with locally advanced or metastatic pancreatic cancer (NCT04390399). Each treatment setting, as well as each first- and second-line or later maintenance treatment, will be evaluated independently as Cohorts A, B, and C, respectively, with Cohorts A and B having independent experimental and control arms. The study will initially enroll 298 subjects across all three cohorts. The primary objective of Cohorts A and B is progression-free survival (PFS) per RECIST V1.1, and the objective of Cohort C is overall survival (OS). Secondary objectives include initial safety and additional efficacy measures, including overall response rate (ORR), complete response (CR) rate, durability of response (DoR), disease control rate (DCR), and overall survival (OS).
Currently, three trial sites have been activated: Hoag Memorial Hospital Presbyterian in Orange County, Calif., The Chan Soon-Shiong Institute for Medicine in Los Angeles County, Calif., and Avera McKennan Hospital and University Health Center in Sioux Falls, South Dakota, which serves patients in the tri-state area (Iowa, Nebraska and South Dakota).