Research shows possible new target for immunotherapy for solid tumors
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CINCINNATI–Research from the University of Cincinnati (UC) reveals a potential new target to help T cells (white blood cells) infiltrate certain solid tumors.

This study, being published in the April 24 advance online edition of the journal Science Signaling, showed that by targeting a certain potassium channel–KCa3.1–the CD8+ T cell migration in patient samples was restored, meaning that they could potentially be more effective in moving in on the tumor and attacking it. CD8+ cells are a type of T cell capable of killing cancer cells.

“Reduced potassium channel activity curbs T cell movement within the tumor,” says Laura Conforti, PhD, professor in the Department of Internal Medicine at the UC College of Medicine, a researcher within the Cincinnati Cancer Center and UC Cancer Institute and corresponding author on the study. “T cell infiltration in solid tumors is limited by multiple factors found within the tumor’s microenvironment, including adenosine, an immunosuppressive substance accumulating in high amounts in solid tumors.”

Conforti and her team, led by Ameet Chimote, PhD, a research associate in the Department of Internal Medicine, analyzed the migration of CD8+ T cells in a 3-D experimental model system that allows the reproduction of some features of the

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