Tazverik Receives FDA Approval as First Treatment Specifically for Metastatic or Locally Advanced Epithelioid Sarcoma

Web Exclusives - Sarcoma, FDA Oncology Update

On January 23, 2020, the FDA granted accelerated approval to tazemetostat (Tazverik; Epizyme), a methyltransferase inhibitor, for the treatment of metastatic or locally advanced epithelioid sarcoma in adults and pediatric patients aged ≥16 years who are not eligible for complete resection.

“For people with epithelioid sarcoma, an aggressive life-threatening cancer that affects young adults, having new treatment options can offer much-needed hope,” said Denise Reinke, MS, NP, MBA, President and Chief Executive Officer, Sarcoma Alliance for Research Through Collaboration, and Co-Founder, Sarcoma Coalition, in a press release.

This approval was based on improvements in overall response rate (ORR) and duration of response (DOR) in a phase 2 clinical trial. Verification and description of clinical benefit in a confirmatory clinical trial(s) may be necessary for continued approval of tazemetostat for this indication.

Key Takeaways:

  • The efficacy of tazemetostat was evaluated in a phase 2, open-label, single-arm cohort (Cohort 5) of a multicenter study in patients with histologically confirmed, metastatic, or locally advanced epithelioid sarcoma. Patients were required to have INI1 protein loss, detected using local tests, and an Eastern Cooperative Oncology Group performance status of 0-2.
  • Patients received tazemetostat 800 mg orally twice daily until disease progression or unacceptable toxicity. Tumor response assessments were performed every 8 weeks. The major efficacy outcome measures were confirmed ORR according to Response Evaluation Criteria in Solid Tumors v1.1 as assessed by blinded independent central review and DOR. Median duration of follow-up was 14 months (range, 0.4-31).
  • Of the 62 patients treated in Cohort 5, the ORR was 15%, with 1.6% achieving a complete response, and 13% achieving a partial response. Among the responders, 67% had a DOR ≥6 months.
  • The most common (≥20%) adverse reactions were pain, fatigue, nausea, decreased appetite, vomiting, and constipation.
  • Tazemetostat increases the risk for secondary malignancies, such as T-cell lymphoma, myelodysplastic syndrome, and acute myeloid leukemia.
  • Tazemetostat can cause fetal harm. Patients should be advised of potential risk to a fetus and to use effective nonhormonal contraception.
Related Items
FDA-Approved Nirogacestat Demonstrates Improved Patient Outcomes in Desmoid Tumor Management
Web Exclusives published on February 12, 2024 in FDA Oncology Update
Iwilfin FDA Approved for Adults and Pediatric Patients with High-Risk Neuroblastoma
Web Exclusives published on January 17, 2024 in FDA Oncology Update
Welireg Now FDA Approved for Patients with Advanced Renal Cell Carcinoma
Web Exclusives published on January 17, 2024 in FDA Oncology Update
Keytruda Plus Chemotherapy Receives New FDA Approvals for Advanced Biliary Tract Cancer and 2 Forms of Advanced Gastroesophageal Junction Adenocarcinoma
Web Exclusives published on December 19, 2023 in FDA Oncology Update
FDA Approved Loqtorzi, a PD-1 Inhibitor, for the Treatment of Adults With Metastatic or Recurrent Nasopharyngeal Carcinoma
Web Exclusives published on December 18, 2023 in FDA Oncology Update
Tibsovo FDA Approved for Patients With Relapsed Myelodysplastic Syndromes and IDH1 Mutation
Web Exclusives published on December 18, 2023 in FDA Oncology Update
Fruzaqla FDA Approved for Refractory Metastatic Colorectal Cancer
JHOP - December 2023 Vol 13, No 6 published on December 6, 2023 in FDA Oncology Update
Rozlytrek Now Approved for Pediatric Patients Older Than 1 Month With Solid Tumors and NTRK Gene Fusion and in New Oral Pellet Form
JHOP - December 2023 Vol 13, No 6 published on December 6, 2023 in FDA Oncology Update
FDA Authorizes Updated COVID-19 Vaccine Formulations for Better Protection Against Current Variants
JHOP - December 2023 Vol 13, No 6 published on November 17, 2023 in FDA Oncology Update
Bosulif Now FDA Approved for Pediatric Patients With Chronic Myelogenous Leukemia
JHOP - December 2023 Vol 13, No 6 published on November 3, 2023 in FDA Oncology Update
© Amplity Health. All rights reserved.

Subscribe Today!

To sign up for our newsletter or print publications, please enter your contact information below.

I'd like to receive: