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Rutgers neuroscientist sheds light on cause for 'chemo brain'
Date:2/21/2013

It's not unusual for cancer patients being treated with chemotherapy to complain about not being able to think clearly, connect thoughts or concentrate on daily tasks. The complaint often referred to as chemo-brain is common. The scientific cause, however, has been difficult to pinpoint.

New research by Rutgers University behavioral neuroscientist Tracey Shors offers clues for this fog-like condition, medically known as chemotherapy-induced cognitive impairment. In a featured article published in the European Journal of Neuroscience, Shors and her colleagues argue that prolonged chemotherapy decreases the development of new brain cells, a process known as neurogenesis, and disrupts ongoing brain rhythms in the part of the brain responsible for making new memories. Both, she says, are affected by learning and in some cases are necessary for learning to occur.

"One of the things that these brain rhythms do is to connect information across brain regions," says Shors, Professor II in the Department of Psychology and Center for Collaborative Neuroscience at Rutgers. "We are starting to have a better understanding of how these natural rhythms are used in the process of communication and how they change with experience."

Working in the Shors laboratory, postdoctoral fellow Miriam S. Nokia from the Department of Psychology at the University of Jyvaskyla in Finland and Rutgers neuroscience graduate student Megan Anderson treated rats with a chemotherapy drug temozolomide (TMZ) used on individuals with either malignant brain tumors or skin cancer to stop rapidly dividing cells that have gone out of control and resulted in cancer.

In this study, scientists found that the production of new healthy brain cells treated with the TMZ was reduced in the hippocampus by 34 percent after being caught in the crossfire of the drug's potency. The cell loss, coupled with the interference in brain rhythms, resulted in the animal being unab
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Contact: Robin Lally
rlally@ur.rutgers.edu
Rutgers University
Source:Eurekalert

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