(Olaratumab) for Soft Tissue Sarcoma By: Majd Abedrabbo, Pharmd Candidate 2018 Fairleigh Dickinson University School of Pharmacy May 3, 2017
Drug Comparison: LartruvoTM (Olaratumab) for Soft Tissue Sarcoma By: Majd Abedrabbo, PharmD Candidate 2018 Fairleigh Dickinson University School of Pharmacy May 3, 2017 Introduction Soft Tissue Sarcoma (STS) is a rare type of cancer with multiple treatment options. There are approximately 12,390 new cases of STS diagnosed and 4,990 Americans are estimated to die each year in the United States. The standard of care for patients with metastatic STS is treatment with doxorubicin, an anthracycline that was approved in 1974 and is associated with significant toxicity, including myelosuppression, the development of secondary cancers, and dose-limiting cardiotoxicity. Other treatment options include targeted therapies, which interfere with mutated or over-active proteins that drive the cancer. In this article, we compare doxorubicin (Adriamycin), the standard of care, chemotherapeutic agent, with Olaratumab (Lartruvo), a new targeted therapy. Background STS is a collection of cancers of tissues that connect and support the body, like fat cells and blood vessels, which are of mesenchymal origin.1 Since sarcomas need not invade the basement membrane, they have a very high metastatic potential, capable of spreading throughout the body with relative ease. Risk factors of STS include specific genetic diseases, radiation treatments for other cancers, and exposure to chemicals.2 Although there are more than 50 types of STS, the most common types in adults are undifferentiated pleomorphic sarcoma, liposarcoma, and leiomyosarcoma.3 The risk and severity of STS depends on the type, which is dependent upon the location, specific cell of origin, stage of differentiation, and mutations. The standard of care for patients with metastatic STS is treatment with doxorubicin, which disrupts topoisomerase II by intercalating into the DNA, preventing DNA replication and transcription, thereby inducing apoptosis.4 It can be used as 1 monotherapy or in combination with other drugs.
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