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Aeolus Pharmaceuticals' AEOL 10113 May Play an Important Role,Regulating the Oxidative Damage Induced by Ionizing Radiation

LAGUNA NIGUEL, Calif.--(BUSINESS WIRE)--Apr 23, 2007 - Aeolus Pharmaceuticals, Inc. (OTCBB:AOLS) announced the presentation of data by researchers at Loma Linda University Medical Center showing that one of the Company's metalloporphyrin antioxidants, AEOL 10113, may play an important role regulating the oxidative damage induced by ionizing radiation.

Radiation therapy is used alone or in combination with surgery and chemotherapy in the care and management of nearly all adult and approximately 75% of pediatric patients with central nervous system malignancies. Success in controlling a brain cancer by radiation therapy hinges on being able to inactivate the cancer cells while preserving normal tissue function.

This study evaluated retinal endothelial cell response to radiation in the presence of a metalloporphyrin antioxidant, AEOL 10113, using monkey choroid-retina endothelial cells. AEOL 10113 was added to the cells one hour prior to the administration of a single, 10 grey dose of radiation. Statistically significant (P less than 0.05), dose-dependent protection of normal retinal endothelial cells by AEOL 10113 was seen at 24 hours and 48 hours following irradiation. In addition, cell viability was significantly enhanced at 24 hours and 48 hours in non-irradiated endothelial cells cultured with AEOL 10113 at 10ug (P less than 0.05). Laser scanning cytometry showed AEOL 10113 altered cell cycle kinetics and led to significantly (p less than 0.05) increased G1 population 48 hours following irradiation.

The Potential for Metalloporphyrin Antioxidants in Radiotherapy for Cancer

Radiotherapy treatment in cancer has the positive effect of tumor destruction, but also has the negative effect of normal tissue damage. Optimal dosing in radiotherapy balances maximum tumor destruction with minimal toxicity and damage to normal tissue. The "ionizing radiation" used in cancer radiotherapy generates reac
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