CTI BioPharma Presents Pivotal Data from Pacritinib Program at the European Hematology Association (EHA) 2022 Congress
SEATTLE, June 10, 2022 /PRNewswire/ --CTI BioPharma (Nasdaq: CTIC) today announced two scientific poster presentations from the Company's pacritinib clinical program at the European Hematology Association (EHA) 2022 Congress, being held in Vienna, Austria, June 9-12, 2022.
"Our presentions today demonstrate that full dose pacritinib achieved higher response rates and a similar, manageable safety profile compared to lower-dose ruxolitinib in patients with myelofibrosis who have moderate or severe thrombocytopenia," said Adam Craig, President and Chief Executive Officer of CTI BioPharma. "As the commercial launch of VONJOTM (pacritinib) in the U.S. continues to exceed our expectations, we are pleased to highlight VONJO's clinical value as a potential best in class treatment for patients with cytopenic myelofibrosis with platelet counts below 50 × 109/L."
Presentation materials will be available at ctibiopharma.com.
Retrospective Comparison of Patient Outcomes on Pacritinib Versus Ruxolitinib in Patients with Myelofibrosis and Thrombocytopenia (New)
Poster Number: P1069
Pacritinib is a novel JAK2/IRAK1 inhibitor approved by the U.S. Food and Drug Administration (FDA) for patients with myelofibrosis and thrombocytopenia. Unlike the JAK 1/2 inhibitor ruxolitinib, which must be dose-reduced or held in patients with thrombocytopenia, pacritinib has been studied at full dose regardless of platelet count. In this part of of the Phase 3 PERSIST-2 study, which focuses on retrospectively analyzing outcomes in patients treated with pacritinib versus ruxolitinib, patients were randomized 1:1:1 to pacritinib 200 mg twice daily (BID), pacritinib 400 mg once daily (QD) or best available therapy (BAT), with 45 percent of patients on BAT receiving ruxolitinib.
This analysis demonstrates overall and fatal adverse events occurred at similar rates on pacritinib versus ruxolitinib, as did bleeding events. Cardiac events occurred more commonly on pacritinib, though the difference was largely due to higher rates of grade 1 peripheral edema on pacritinib. There were lower rates of herpes zoster reactivation (n=0 vs. 1), pulmonary aspergilosis (n=1 vs. 0), deep venous thrombosis (n=0 vs. 1) and pulmonary embolism (n=1 vs. 0) on pacritinib and ruxolitinib, respectively. These results show that pacritinib, administered at the full dose of 200 mg BID, yielded higher response rates and a similar safety profile compared to lower-dose ruxolitinib, in patients with myelofibrosis who have moderate or severe thrombocytopenia.
Risk-Adjusted Safety Analysis of Pacritinib in Patients with Myelofibrosis (Encore)
Poster Number: P1068
Pacritinib is a novel JAK2/IRAK1 inhibitor that has shown significant activity in patients with myelofibrosis, including those with platelet counts <50 × 109/L. This safety analysis focuses on toxicities of interest for patients treated with pacritinib 200 mg twice daily (BID) and best available therapy (BAT), including ruxolitinib, on the Phase 3 PERSIST-2 and Phase 2 PAC203 studies. Because the average treatment duration was longer for patients on pacritinib 200 mg BID on PERSIST-2 and PAC203 compared to BAT on PERSIST-2, this analysis presents adverse events rates in these patients corrected for duration of exposure.
This risk-adjusted analysis demonstrates that the safety profile of pacritinib 200 mg BID is comparable to BAT. In particular, rates of bleeding were not elevated on pacritinib 200 mg BID compared to BAT, both overall and in patients with PLT <50 x 109/L. Rates of fatal events, thrombosis, major adverse cardiac events (MACE) and non-melanoma skin cancer were higher on ruxolitinib than pacritinib. These results indicate that pacritinb 200 mg BID may represent a full-dose therapeutic option for patients with myelofibrosis, including those with thrombocytopenia.
About VONJO (pacritinib)
VONJO is indicated for the treatment of adults with intermediate or high-risk primary or secondary (post-polycythemia vera or post-essential thrombocythemia) myelofibrosis with a platelet count below 50 × 109/L. This indication is approved under accelerated approval based on spleen volume reduction. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial(s).
Important VONJO Safety Information
Avoid use of VONJO in patients with active bleeding and hold VONJO 7 days prior to any planned surgical or invasive procedures. Assess platelet counts periodically, as clinically indicated. Manage hemorrhage using treatment interruption and medical intervention.
Control pre-existing diarrhea before starting VONJO treatment. Manage diarrhea with antidiarrheal medications, fluid replacement, and dose-modification. Treat diarrhea with anti–diarrheal medications promptly at the first onset of symptoms. Interrupt or reduce VONJO dose in patients with significant diarrhea despite optimal supportive care.
Monitor platelet count prior to VONJO treatment and as clinically indicated during treatment. Interrupt VONJO in patients with clinically significant worsening of thrombocytopenia that lasts for more than 7 days. Restart VONJO at 50% of the last given dose once the toxicity has resolved. If toxicity recurs hold VONJO. Restart VONJO at 50% of the last given dose once the toxicity has resolved.
Prolonged QT interval:
Avoid use of VONJO in patients with a baseline QTc of >480 msec. Avoid use of drugs with significant potential for QTc prolongation in combination with VONJO. Correct hypokalemia prior to and during VONJO treatment. Manage QTc prolongation using VONJO interruption and electrolyte management.
Major Adverse Cardiac Events (MACE):
Consider the benefits and risks for the individual patient prior to initiating or continuing therapy with VONJO particularly in patients who are current or past smokers and patients with other cardiovascular risk factors. Patients should be informed about the symptoms of serious cardiovascular events and the steps to take if they occur.
Patients with symptoms of thrombosis should be promptly evaluated and treated appropriately.
Consider the benefits and risks for the individual patient prior to initiating or continuing therapy with VONJO, particularly in patients with a known malignancy (other than a successfully treated NMSC), patients who develop a malignancy, and patients who are current or past smokers.
Risk of Infection:
Interactions with CYP3A4 Inhibitors or Inducers:
Drug interruptions due to an adverse reaction occurred in 27% patients who received VONJO 200 mg twice daily compared to 10% of patients treated with BAT. Dosage reductions due to an adverse reaction occurred in 12% of patients who received VONJO 200 mg twice daily compared to 7% of patients treated with BAT. Permanent discontinuation due to an adverse reaction occurred in 15% of patients receiving VONJO 200 mg twice daily compared to 12% of patients treated with BAT.
Please visit http://www.ctibiopharma.com/vonjo_prescribing_information for full Prescribing Information and the Medication Guide.
About CTI BioPharma Corp.
VONJOTM is a trademark of CTI BioPharma Corp.
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SOURCE CTI BioPharma Corp.
Company Codes: NASDAQ-SMALL:CTIC