PharmaMar Announces Positive and Statistically Significant Overall Survival and Progression-Free Survival Results for Zepzelca® (lurbinectedin) and Atezolizumab Combination in First-Line Maintenance Therapy for Extensive-Stage Small Cell Lung Cancer

"The results of the Phase 3 IMforte trial are highly encouraging and showed a statistically significant benefit for the lurbinectedin and atezolizumab combination for extensive-stage small cell lung cancer patients receiving this treatment in the first-line maintenance setting. These results demonstrate the potential of this regimen to delay disease progression and extend survival for patients with this aggressive disease," said Rob Iannone, M.D., M.S.C.E., executive vice president, global head of research and development, and chief medical officer of Jazz Pharmaceuticals. "We are pleased with these clinically meaningful results and plan to submit an sNDA in the first half of 2025 to support this combination in the first-line maintenance setting. We thank the investigators and patients who are involved in this trial, along with our partners at Roche."

"Lurbinectedin monotherapy is currently the standard of care in 2L SCLC. In Europe, it is only approved in Switzerland and early access and compassionate use programs have already allowed some European patients to benefit from lurbinectedin," said Javier Jiménez, Chief Medical Officer of PharmaMar.

The combination was generally well-tolerated. The preliminary safety data in the ongoing trial is consistent with the known safety profiles of lurbinectedin and atezolizumab with no new safety signals observed in the combination arm. 

Jazz and Roche plan to submit these data for presentation at a future medical meeting. 

PharmaMar will submit a marketing authorisation application (MAA) to the EMA in the first half of 2025 to request regulatory approval in the European Union (EU). Lurbinectedin is available for use in 16 territories around the world.

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About PharmaMar

PharmaMar is a biopharmaceutical company focused on the research and development of new oncology treatments, whose mission is to improve the healthcare outcomes of patients afflicted by serious diseases with our innovative medicines. The Company is inspired by the sea, driven by science, and motivated by patients with serious diseases to improve their lives by delivering novel medicines to them. PharmaMar intends to continue to be the world leader in marine medicinal discovery, development and innovation.

PharmaMar has developed and now commercializes Yondelis® in Europe by itself, as well as Zepzelca® (lurbinectedin), in the US; and Aplidin® (plitidepsin), in Australia, with different partners. In addition, it has a pipeline of drug candidates and a robust R&D oncology program. PharmaMar has other clinical-stage programs under development for several types of solid cancers: lurbinectedin, ecubectedin, PM534 and PM54. Headquartered in Madrid (Spain), PharmaMar has subsidiaries in Germany, France, Italy, Belgium, Austria, Switzerland and The United States. PharmaMar also wholly owns Sylentis, a company dedicated to researching therapeutic applications of gene silencing (RNAi). To learn more about PharmaMar, please visit us at www.pharmamar.com.

About the IMforte Phase 3 Trial

IMforte (NCT05091567) is an ongoing Phase 3, randomized, multicenter maintenance trial evaluating the efficacy, safety and pharmacokinetics of lurbinectedin plus atezolizumab in adults (≥18 years) with ES-SCLC following induction therapy with carboplatin, etoposide and atezolizumab. The primary endpoints for this study are OS and IRF-assessed PFS.

The trial consists of two phases: an induction phase and a maintenance phase. Participants were required to have an ongoing response or stable disease per the Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 after the induction phase of four cycles of carboplatin, etoposide, and atezolizumab to be considered for eligibility screening for the maintenance phase. Eligible participants were randomized in a 1:1 ratio to receive either lurbinectedin plus atezolizumab or atezolizumab in the maintenance phase.

The trial is sponsored by Roche and co-funded by Jazz Pharmaceuticals. Additional information about the trial, including eligibility criteria and a list of clinical trial sites, can be found at: https://clinicaltrials.gov (ClinicalTrials.gov Identifier: NCT05091567).

About Zepzelca^®

Zepzelca^® (lurbinectedin), also known as PM1183, is an analog of the marine compound ET-736 isolated from the sea squirt Ecteinascidia turbinata in which a hydrogen atom has been replaced by a methoxy group. It is a selective inhibitor of the oncogenic transcription programs on which many tumors are particularly dependent. Together with its effect on cancer cells, lurbinectedin inhibits oncogenic transcription in tumor-associated macrophages, downregulating the production of cytokines that are essential for the growth of the tumor. Transcriptional addiction is an acknowledged target in those diseases, many of them lacking other actionable targets. 

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[i] Cancer today. (s. f.). https://gco.iarc.who.int/today/en/fact-sheets-populations#regions

[ii] Alvarado-Lunda G, Morales-Espinosa D. Treatment for small cell lung cancer, where are we now? – A review. Transl Lung Cancer Res. 2016;5(1):26-38.

[iii] SEER Explorer Lung and Bronchus Cancer, Recent Trends in SEER Incidence Rates, 2000-2016, by Age, https://seer.cancer.gov/explorer Updated June 27, 2024. Accessed October 10, 2024.

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