Some brain cells are better virus fighters

Viruses often spread through the brain in patchwork patterns, infecting some cells but missing others. New research at the School of Medicine helps explain why: Natural immune defenses that resist viral infection are turned on in some brain cells but switched off in others. The white arrows in the picture highlight infected cells in a mouse brain.

New clues to causes of peripheral nerve damage

Although peripheral neuropathies afflict some 20 million Americans, their underlying causes are not completely understood. Now, scientists have shown that damage to energy factories in Schwann cells, which grow alongside neurons and enable nerve signals to travel from the spinal cord to the tips of the fingers and toes, may play a central role. Shown is a Schwann cell surrounding nerve axons, shown in green.
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