ST. PAUL, Minn. – A combination of drugs widely used to treat infections caused by HIV appears to stop brain damage caused by the virus as well, according to a study published in the October 9, 2007, issue of Neurology®, the medical journal of the American Academy of Neurology.The study involved 53 men and women with an average age of 38. The participants were given a combination of several antiretroviral drugs known as Highly Active Anti-Retroviral Therapy (HAART) for one year. Researchers tested the participants’ cerebrospinal fluid before and after treatment to see if there were elevated levels of a particular biomarker for brain injury called neurofilament light protein.