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New Class of Platinum-Based Anti-Tumor Drugs, Bisplatinates, Demonstrates Potent Anti-Tumor Activity and Ability to Overcome Resistance to Currently Available Platinum-Based Agents
Date:11/30/2009

SEATTLE, Nov. 30 /PRNewswire-FirstCall/ -- Cell Therapeutics, Inc. (CTI) (Nasdaq and MTA: CTIC) announced today that its new class of platinum-based anti-tumor compounds, termed bis-platinates, demonstrated a stronger anti-tumor potency and activity compared to currently available platinum-based compounds as well as the ability to overcome cisplatin-resistance in cancer cell lines. The results were presented in a paper titled "Novel Bis-platinum Complexes Endowed with an Improved Pharmacological Profile," by Laura Gatti et al. that was published in the online edition of the journal Molecular Pharmaceutics. Platinum-based compounds, such as cisplatin and oxaliplatin, are the cornerstone in the treatment of testicular, ovarian, colorectal, lung and other cancers but their effectiveness is limited by the relatively low therapeutic ratio, the ratio of the maximally tolerated dose of the drug to the effective dose, and the frequent occurrence of drug resistance leading to cancer recurrence. The novel bis-platinum compounds represent a completely new class of platinum-based drugs called bisplatinates.

The bis-platinum based compounds, unlike the currently approved platinum-based compounds, contain two platinum atoms and work by binding to and damaging both strands of DNA making it much more difficult for cancer cells to repair the damage. The research demonstrated through cancer cell assays and animal tumor models that the bis-platinum complexes exhibited greater cytotoxic potency and anti-tumor effect compared to cisplatin and oxaliplatin. There was more than a 200-fold increase in percent accumulation in tumor cells of the bisplatinum compounds compared to cisplatin and oxaliplatin. The bisplatinates were substantially more active against human tumors grown in an immunodeficient preclinical model than the standard palatinate compounds, oxaliplatin, carboplatin and cisplatin. Furthermore, the bis-platinum compounds demonstra
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SOURCE Cell Therapeutics, Inc.
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