LOS ANGELES, Oct. 10, 2016 /PRNewswire/ -- CytRx Corporation (NASDAQ: CYTR), a biopharmaceutical research and development
Of the 36 evaluable patients receiving either 170mg/m2 or 250mg/m2 of aldoxorubicin plus ifosfamide and mesna, 13 of 36 (36%) achieved a partial response of the target lesion by RECIST 1.1 criteria, 22 of 36 (61%) had stable disease, and one patient had progressive disease. Median progression-free survival has not been reached, and dose-limiting toxicities were not observed in either cohort. No clinically significant cardiac toxicities were seen. The most common Grade 3 or 4 adverse events were neutropenia (71%), anemia (54%), thrombocytopenia (17%) and febrile neutropenia (14%). There were nine treatment-related serious adverse events, and no treatment-related deaths. The trial has been expanded to allow continued enrollment of additional sarcoma patients at the 250 mg/m2 dose of aldoxorubicin with ifosfamide and mesna.
"The results to date demonstrate that aldoxorubicin combined with ifosfamide provides significant clinical benefit for sarcoma patients," said Sant Chawla, M.D., F.R.A.C.P., the trial's principal investigator and Director of the Sarcoma Oncology Center in Santa Monica, California. "More than one-third of sarcoma patients achieved a partial response for the target lesion and 61% had prolonged stable disease. Importantly, six patients with unresectable tumors achieved greater than 50% tumor shrinkage allowing some of them to become eligible for surgery. Further, we did not see any signs of cardiotoxicity including in patients that received approximately 10 times the cumulative maximum dose of doxorubicin."
The Phase 1b/2 clinical study is a single-center trial that has enrolled 40 patients to date with locally advanced, unresectable, and/or metastatic soft tissue sarcoma, intermediate-grade or high-grade chondrosarcoma or osteosarcoma. In the dose escalation phase, patients received either 170mg/m2 or 250mg/m2 of aldoxorubicin in combination with up to a 14-day continuous infusion of ifosfamide (1g/m2/day) plus mesna over a 28-day cycle. Up to six cycles of ifosfamide/mesna with aldoxorubicin can be administered, and aldoxorubicin may be continued until tumor progression or unacceptable toxicity occurs. The expansion phase will enroll patients at the 250mg/m2 dose of aldoxorubicin and will allow for patients that had received prior chemotherapy to be included. The primary endpoint of the study is safety, and secondary endpoints include overall response rates and progression-free survival.
Aldoxorubicin is a rationally-engineered cytotoxic which combines doxorubicin, a widely used chemotherapeutic agent, with a novel linker molecule that binds directly and specifically to circulating albumin, the most abundant protein in the bloodstream. Protein-hungry tumors concentrate albumin, which facilitates 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. Typically, 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 450 mg/m2. Using this acid-sensitive linker technology, aldoxorubicin delivers greater doses of doxorubicin (3 ½ to 4 times). To date, there has been no evidence of clinically significant effects of aldoxorubicin on heart muscle, even at cumulative doses of doxorubicin in excess of 5,000 mg/m2. Aldoxorubicin is the first-ever single agent to show superiority over doxorubicin in a randomized global Phase 2b clinical trial in first-line STS.
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, its improved version of the widely used chemotherapeutic agent doxorubicin. CytRx is also expanding its pipeline of oncology candidates at its laboratory facilities in Freiburg, Germany, through its LADR™ (Linker Activated Drug Release) technology platform, a discovery engine designed to leverage CytRx's expertise in albumin biology and linker technology for the development of a new class of anti-cancer therapies.
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 testing of aldoxorubicin and preclinical testing of its LADR™ linker technology platform, the risk that any future pre-clinical or human testing of compounds based on the LADR™ technology platform might not show efficacy or reduced side effects of those compounds, 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 2 and Phase 3 clinical development of aldoxorubicin for SCLC and STS, respectively, and the preclinical and clinical development of compounds based on the LADR™ technology platform, and other 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.
Company Contact:CytRx CorporationDavid J. HaenVice President, Business Development and Investor Relations(310) 826-5648, ext. [email protected]
Investor Relations:Alexander Capital, LP(855) 288-ALEX (2539)[email protected]
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SOURCE CytRx Corporation
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