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Researchers determine pathway for origin of most common form of brain and spinal cord tumor
Date:6/13/2012

, a type of lung cancer mostly associated with exposure to asbestos.

In their research, the investigators collected 70 human meningioma tissue samples and found that YAP1 expression was present in the nuclei of all of the samples, regardless of tumor "grade," meaning it appears to be a molecular mechanism involved in the earliest stages of meningioma development. In the lab, Baia knocked down the amount of YAP1 in cell nuclei and found that tumor proliferation went down. When there was more YAP1, the cells grew and also migrated more.

Baia and his team also injected human cell lines in which YAP1 was overexpressed into the brains of the mice. "With excess YAP, all of the mice got tumors," Baia says.

The next step, Baia says, is to determine the exact genes activated by the arrival of YAP1 in the cell nuclei. Then, the hope is, new treatments can be developed to target those genes, he adds.


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Contact: Stephanie Desmon
sdesmon1@jhmi.edu
410-955-8665
Johns Hopkins Medical Institutions
Source:Eurekalert

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