In addition to detecting the beads effect, the team came upon yet another major finding: when statins are removed, the beads-on-a-string effect disappears, offering great promise to those being treated with the drugs.

“For some patients, just as much as statins work to save their lives, they can cause impairments,” said Monica Chaung, who has been part of the team and is a UA undergraduate researcher studying molecular and cellular biology and physiology.

“It’s not a one drug fits all,” said Chaung, a UA junior who is also in the Honors College. “We suspect different gene mutations alter how people respond to statins.”

Having been trained by Kraft in techniques to investigate cultured neurons, Chuang was testing gene mutations and found variation in sensitivity to statins. It was through the work of Chuang and Kraft that the team would later determine that, after removing the statins, the cells were able to repair themselves; the neurotoxicity was not permanent, Restifo said.

“In the clinical literature, you can read reports on fuzzy thinking, which stops when a patient stops taking statins. So, that was a very important demonstration of a parallel between the clinical reports and the laboratory phenomena,” Restifo said.

The finding led the team to further investigate the neurotoxicity of statins.

“There is no question that these are very important and very useful drugs,” Restifo said. Statins have been shown to lower cholesterol and prevent heart attacks and strokes.

But too much remains unknown about how the drugs’ effects may contribute to muscular, cognitive and behavioral changes.

“We don’t know the implications of the beads, but we have a number of hypotheses to test,” Restifo said, adding that further studies should reveal exactly what happens when the transportation system within neurons is disrupted.

Also, given the move toward prescribing statins to children, the need to have an expanded understanding of the effects of statins on cognitive development is critical, Kraft said.

“If statins have an effect on how the nervous system matures, that could be devastating,” Kraft said. “Memory loss or any sort of disruption of your memory and cognition can have quite severe effects and negative consequences.”

Restifo and her colleagues have multiple grants pending that would enable the team to continue investigating several facets related to the neurotoxicity of statins. Among the major questions is, to what extent does genetics contribute to a person’s sensitivity to statins?