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American Chemical Society's Weekly PressPac -- Nov. 7, 2007
Date:11/12/2007

ARTICLE #1 FOR IMMEDIATE RELEASE

Toward cancer drugs that penetrate 10 times deeper into the brain
Bioconjugate Chemistry

A new drug-delivery system for cancer of the brain one of the most difficult cancers to treat has the potential to carry anticancer drugs 10 times deeper into tumors than conventional medications, researchers in Connecticut and New York report. Their study is scheduled for the Nov./Dec. issue of ACS Bioconjugate Chemistry, a bi-monthly journal.

Implants with anticancer drugs inside plastic or polymer material have been used for years to treat brain tumors, which occur in people of all ages but are the leading cause of cancer-related death in patients under age 35. Although this method delivers high doses of medication to the tumor, theres a need for a drug that penetrates deeper into the brain tissue to kill tumors. Most drugs diffuse barely a few millimeters from the implant site, the researchers say.

In the new study, Mark Saltzman and colleagues showed that linking the anticancer drug campothecin (CPT) to the polymer polyethylene glycol (PEG), increased drug diffusion to more than a centimeter from the implant site. They also identified a promising CPT-PET compound that could deliver 11 times more medication to the tumor than the plain drug alone. For patients, those advantages could substantially improve chances for successful treatment, the researchers indicate.

ARTICLE #1 FOR IMMEDIATE RELEASE "Conjugation to Increase Treatment Volume during Local Therapy: A Case Study with PEGylated Camptothecin"

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