CytRx Corporation Doses First Patient in Phase 2 Clinical Trial with Aldoxorubicin for the Treatment of Unresectable Glioblastoma Multiforme (Brain Cancer)
LOS ANGELES--(BUSINESS WIRE)--Jan. 14, 2014-- CytRx Corporation (NASDAQ: CYTR), a biopharmaceutical research and development company specializing in oncology, today announced that the first patient has been dosed in the Company’s Phase 2 clinical trial with aldoxorubicin for the treatment of unresectable glioblastoma multiforme (GBM), a deadly form of brain cancer. The open-label, multisite trial is designed to investigate the preliminary efficacy and safety of aldoxorubicin in patients whose tumors have progressed following prior treatment with surgery, radiation and temozolomide.
“With the dosing of the first patients we are on schedule with this important Phase 2 GBM trial, and look forward to reporting preliminary results in the second half of this year,” said CytRx President and CEO Steven A. Kriegsman. “Aldoxorubicin has been shown to have the unique ability to cross the blood-brain barrier in animal models of human glioblastoma, potentially creating a new approach to attacking brain tumors. Should the data from this trial be positive, we will pursue the rapid development of aldoxorubicin for unresectable GBM, including filing for ‘breakthrough therapy’ designation with the U.S. Food and Drug Administration, which could expedite marketing approval.”
The primary objective of this Phase 2 trial is to determine progression-free survival (PFS) and overall survival (OS) according to RANO Working Group Criteria. The principal secondary objective is to evaluate the safety of aldoxorubicin in study patients as assessed by the frequency and severity of adverse events. The clinical trial is expected to enroll up to 28 patients randomly assigned equally to receive either 350 mg/m2 (260 mg/m2 doxorubicin equivalent) or 250 mg/m2 (185 mg/m2 doxorubicin equivalent) of aldoxorubicin intravenously on Day 1, and every 21 days thereafter until evidence of tumor progression, unacceptable toxicity or withdrawal of consent. Tumor response will be monitored every 6 weeks by MRI until disease progression occurs. The trial is being conducted at the John Wayne Cancer Center/Sarcoma Oncology Center in Santa Monica, Calif., City of Hope in Duarte, Calif. and the Louisiana State University Health Sciences Center in New Orleans.
This Phase 2 study follows positive confirmatory results reported in 2013 from a preclinical study in which aldoxorubicin demonstrated statistically significant efficacy (p<.0001) in the treatment of rapidly growing human brain (glioblastoma) cancer in the brains of animals. In that study, animals treated with aldoxorubicin had median survival of more than 63 days, compared with approximately 25 days for animals treated with doxorubicin or saline. In addition, because aldoxorubicin uptake was confined to the tumor in the brain rather than normal brain tissue, the principal investigator concluded that aldoxorubicin has the potential to safely shrink glioblastoma tumors, which could dramatically prolong patient survival.
About Glioblastoma Multiforme
Glioblastoma multiforme (GBM) is the most common and most malignant brain tumor in adults, and afflicts more than 12,500 new patients in the U.S. annually. The five-year survival rate is approximately 4%. Despite surgical resection, radiotherapy and chemotherapy, the median survival after diagnosis is about 12 to 14 months. Although treatment failure may be due to several factors, limited efficacy of chemotherapeutic agents has been attributed to several contributing factors, including insufficient drug delivery to the tumor site through the blood-brain barrier.
The widely used chemotherapeutic agent doxorubicin is delivered systemically and is highly toxic, which limits its dose to a level below its maximum therapeutic benefit. Doxorubicin also is associated with many side effects, especially the potential for damage to heart muscle at cumulative doses greater than 500 mg/m2. Aldoxorubicin combines doxorubicin with a novel single-molecule linker that binds directly and specifically to circulating albumin, the most plentiful protein in the bloodstream. Protein-hungry tumors concentrate albumin, thus increasing the delivery of the linker molecule with the attached doxorubicin to tumor sites. In the acidic environment of the tumor, but not the neutral environment of healthy tissues, doxorubicin is released. This allows for greater doses (3 ½ to 4 times) of doxorubicin to be administered while reducing its toxic side effects. In studies thus far there has been no evidence of clinically significant effects of aldoxorubicin on heart muscle, even at cumulative doses of drug well in excess of 2 g/m2.
About CytRx Corporation
CytRx Corporation is a biopharmaceutical research and development company specializing in oncology. CytRx currently is focused on the clinical development of aldoxorubicin (formerly known as INNO-206), its improved version of the widely used chemotherapeutic agent doxorubicin. CytRx has completed a global Phase 2b clinical trial with aldoxorubicin as a first-line therapy for soft tissue sarcomas, a Phase 1b/2 clinical trial primarily in the same indication, a Phase 1b study of aldoxorubicin in combination with doxorubicin in patients with advanced solid tumors and a Phase 1b pharmacokinetics clinical trial in patients with metastatic solid tumors. CytRx plans to initiate under a special protocol assessment a pivotal Phase 3 global trial with aldoxorubicin as a therapy for patients with soft tissue sarcomas whose tumors have progressed following treatment with chemotherapy. CytRx has initiated a Phase 2 clinical trial with aldoxorubicin in patients with late-stage glioblastoma (brain cancer), and plans to initiate a Phase 2 clinical trial in HIV-related Kaposi’s sarcoma. CytRx plans to expand its pipeline of oncology candidates based on a linker platform technology that can be utilized with multiple chemotherapeutic agents and may allow for greater concentration of drug at tumor sites. CytRx also has rights to two additional drug candidates, tamibarotene and bafetinib. CytRx completed its evaluation of bafetinib in the ENABLE Phase 2 clinical trial in high-risk B-cell chronic lymphocytic leukemia (B-CLL), and plans to seek a partner for further development of bafetinib. For more information about CytRx Corporation, visit www.cytrx.com.
This press release contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended. Such statements involve risks and uncertainties that could cause actual events or results to differ materially from the events or results described in the forward-looking statements, including risks relating to the outcome, timing and results of CytRx's clinical trials, the risk that any future human testing of aldoxorubicin, including the Phase 2 study of aldoxorubicin for the treatment of unresectable glioblastoma multiforme (GBM), might not produce results similar to those seen in past human or animal testing, including the mouse study described in this press release, risks related to CytRx's ability to manufacture its drug candidates in a timely fashion, cost-effectively or in commercial quantities in compliance with stringent regulatory requirements, risks related to CytRx's need for additional capital or strategic partnerships to fund its ongoing working capital needs and development efforts, including the Phase 3 clinical development of aldoxorubicin, and the risks and uncertainties described in the most recent annual and quarterly reports filed by CytRx with the Securities and Exchange Commission and current reports filed since the date of CytRx's most recent annual report. All forward-looking statements are based upon information available to CytRx on the date the statements are first published. CytRx undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.
Source: CytRx Corporation
Posted: January 2014