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Spectrum Pharmaceuticals (NasdaqGS: SPPI), a biotechnology company with fully integrated commercial and drug development operations and a primary focus in hematology and oncology, announced today the that the company has submitted a New Drug Application (NDA) to the U.S. Food and Drug Administration (FDA) for approval of Belinostat, a pan-histone deacetylase (HDAC) inhibitor, for the treatment of patients with relapsed or refractory peripheral T-cell lymphoma (R/R PTCL). Belinostat is differentiated from other HDAC inhibitors that selectively inhibit a single class of HDAC enzymes by virtue of its inhibition of all 3 classes of the zinc-dependent HDAC enzymes (Class I, Class II and Class IV); this leads to different alterations in histone and non-histone protein acetylation that, in turn, could importantly influence chromatin accessibility, gene transcription, and activity in different cancer patients, including those who develop drug resistant disease.
“While important strides have been made in treating patients with PTCL, this is a deadly disease and remains an unmet medical need with approximately 70% of patients failing current therapies,” said Rajesh C. Shrotriya, MD, Chairman, Chief Executive Officer, and President of Spectrum Pharmaceuticals. “Based on the clinical data, belinostat was shown to have an acceptable safety profile and clinical efficacy, with complete responses in heavily pretreated patients. In June, data was presented at an oral session at ASCO which demonstrated the clinical activity of belinostat in treating patients (N=129) with R/R PTCL with an overall response rate of 26% in these heavily pretreated patients that included patients who had received a previous allogeneic or autologous stem cell transplant.”
About Peripheral T-Cell Lymphoma
According to the Lymphoma Research Foundation (
www.lymphoma.org), lymphoma is the most common blood cancer. The two main forms of lymphoma are Hodgkin's lymphoma and non-Hodgkin's lymphoma (NHL). Lymphoma occurs when lymphocytes, a type of white blood cell, grow abnormally where they typically reside in the lymph glands. The body has two main types of lymphocytes that can develop into lymphomas: B-lymphocytes (B-cells) and T-lymphocytes (T-cells). Peripheral T-cell lymphoma (PTCL) comprises a group of rare and aggressive NHLs that develop from mature T-cells. PTCL accounts for approximately 10 to 15% of all NHL cases in the United States.
Belinostat (PXD 101) is a pan-HDAC inhibitor being studied in multiple clinical trials as a single agent or in combination with chemotherapeutic agents for the treatment of various hematological and solid cancers. Its anticancer effect is thought to be mediated through multiple mechanisms of action, including the inhibition of cell proliferation, induction of apoptosis (programmed cell death), inhibition of angiogenesis, induction of differentiation, and the activity in tumors that had become resistant to anticancer agents such as the platinums, taxanes and topoisomerase II inhibitors.