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  • Title: Olaratumab: A Novel Platelet-Derived Growth Factor Receptor α-Inhibitor for Advanced Soft Tissue Sarcoma.
    Author: Andrick BJ, Gandhi A.
    Journal: Ann Pharmacother; 2017 Dec; 51(12):1090-1098. PubMed ID: 28778132.
    Abstract:
    OBJECTIVE: To review and summarize data on olaratumab, which was approved by the US Food and Drug Administration (FDA) in October 2016, in combination with doxorubicin, for the treatment of advanced soft tissue sarcoma. DATA SOURCES: A literature search using PubMed was conducted using the search terms olaratumab, IMC-3G3, and advanced soft tissue sarcoma from January 2005 to June 2017. STUDY SELECTION AND DATA EXTRACTION: The literature search was confined to human studies published in English. Trials of olaratumab for advanced soft tissue sarcomas were prioritized. DATA SYNTHESIS: Olaratumab is a human antiplatelet-derived growth factor receptor α monoclonal antibody. Its accelerated FDA approval was based on a phase II randomized trial of olaratumab plus doxorubicin (n = 66) versus doxorubicin monotherapy (n = 67) in patients with advanced soft tissue sarcoma. Olaratumab 15 mg/kg was administered intravenously (IV) on days 1 and 8 in combination with doxorubicin 75 mg/m2 IV on day 1 every 21 days for a total of 8 cycles compared to doxorubicin 75 mg/m2 IV monotherapy. The response rate was 18.2% with combination therapy versus 11.9% with monotherapy and median progression-free survival of 6.6 and 4.1 months, respectively. Additionally, overall survival was increased by 11.8 months in the olaratumab arm (26.5 months vs 14.7 months). Clinically relevant adverse effects in the olaratumab + doxorubicin arm included neutropenia (58%), mucositis (53%), nausea (73%), vomiting (45%), and diarrhea (34%). CONCLUSION: Olaratumab, in combination with doxorubicin, represents a novel treatment strategy for advanced soft tissue sarcoma and provides a significant survival advantage for this rare disease state with limited treatment options.
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