Lancet Publishes First Trial To Show Overall Survival Benefit Of Halaven® (eribulin) in People With Soft Tissue Sarcoma Sub-Types

HATFIELD, England, February 11, 2016 /PRNewswire/ --

An application to extend the indication of eribulin for the treatment of patients with unresectable locally advanced soft tissue sarcoma subtypes has been submitted in the EU 

Full results of study 309 published for the first time in The Lancet show Halaven(R) (eribulin) improved median overall survival compared to dacarbazine for people with unresectable locally advanced liposarcomas and leiomyosarcomas,[1] two of the most common forms of soft-tissue sarcoma.[2] In addition to the full results, The Lancet has also published an editorial in which the results of the study are discussed.[3]

"This is the first data of a single agent therapy to show such a benefit. The fact that these results have been published in such a prestigious clinical journal, shows their importance in this area of unmet need," commented Patrick Schöffski, Head of the Department of General Medical Oncology, University Hospitals Leuven, Belgium.

Study 309 included data from 452 people (aged 18 and over) with leiomyosarcomas or liposarcomas to compare the efficacy and safety of eribulin to dacarbazine.[1] Leiomyosarcomas and liposarcomas make up around 30% of all cases of soft tissue sarcomas[2] and develop from cells in the tissues that surround the body such as fat, muscle, nerves, fibrous tissues and blood.[4] Leiomyosarcomas form from cells called smooth muscle and can start anywhere in the body,[4] while liposarcomas (adipocytic sarcomas) originate in fat cells and can also occur anywhere in the body.[4]

"We are proud to see these data published in The Lancet and will continue to develop compounds that make a positive difference to the lives of people with cancer and their loved ones. We are delighted that eribulin has been licensed in the US in this important soft tissue sarcoma subtype", comments Gary Hendler, President, Eisai Global Oncology Business Unit and President & CEO Eisai EMEA.

In July a Type II variation application to extend the indication of eribulin was submitted in the European Union for the treatment of patients with unresectable soft tissue sarcoma who have received prior chemotherapy for locally advanced disease. In the US, the Food and Drug Administration (FDA) approval was granted on January 28 2016 for eribulin in the treatment of patients with unresectable liposarcoma who have received a prior anthracycline containing regimen. A similar application was submitted in Japan.

Though soft tissue sarcomas are relatively rare, they carry a poor prognosis, with many people unresponsive to treatment.[5] In Europe, approximately 29,000 people are diagnosed with soft tissue sarcomas each year.[6] Approximately 11,930 cases of soft tissue sarcomas will have been diagnosed in the United States this year.[7] In Japan, approximately 2,000 cases of soft tissue sarcomas are diagnosed each year.[8],[9]  

Eisai is dedicated to discovering, developing and producing innovative oncology therapies that can make a difference and impact the lives of patients and their families. This passion for people is part of Eisai's human health care (hhc) mission, which strives for better understanding of the needs of patients and their families to increase the benefits health care provides.

Notes to Editors  

Halaven(R) (eribulin)  

Eribulin is the first in the halichondrin class of microtubule dynamics inhibitors with a novel mechanism of action. Structurally eribulin is a simplified and synthetically produced version of halichondrin B, a natural product isolated from the marine sponge Halichondria okadai. Eribulin is believed to work by inhibiting the growth phase of microtubule dynamics which prevents cell division.

Eribulin is currently indicated for the treatment of women with locally advanced or metastatic breast cancer who have progressed after at least one chemotherapeutic regimen for advanced disease. Prior therapy should have included an anthracycline and a taxane in either the adjuvant or metastatic setting, unless patients were not suitable for these treatments.[10]

About Soft Tissue Sarcomas 

Soft tissue sarcoma is a collective term for a diverse group of malignant tumours.

Unlike other cancers such as non-small cell lung cancer (NSCLC), soft tissue sarcomas are mostly diagnosed with localised disease, and many are amenable to complete surgical removal, yet relapse rates can be as high as 50 percent.[11]Outcomes for patients with advanced disease are poor, with median survival around one year or less. Due to the rarity of these tumours, evidence for prognostic factors is weak and not well understood.[5]

Global Phase III Clinical Study 309[1]

The primary endpoint of the study was to compare overall survival between patients treated with eribulin mesilate (1.4 mg/msquared intravenously on days 1 and 8) and those treated with dacarbazine (850 mg/msquared, 1000 mg/msquared, or 1200 mg/msquared [dose dependent on centre and clinician] intravenously on day 1). The additional endpoints included progression free survival and quality of life.[1]

Patients were aged greater than or equal to18 years with advanced high/intermediate grade leiomyosarcoma or dedifferentiated, myxoid, round cell or pleomorphic variants of adipocytic sarcoma (ADI) incurable by surgery and/or radiotherapy were enrolled. Patients had ECOG status less than or equal to2 and had received greater than or equal to2 standard systemic treatment regimens including an anthracycline. Patients were randomized 1:1 to eribulin mesilate (1.4 mg/m2, IV on D1 and D8) or dacarbazine (850-1200 mg/m2, IV on D1) every 21 days until disease progression.

Overall, 452 patients (67% female; 79%

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