Disclosed are compositions comprising an interferon-alpha binding protein and combined anti-retroviral therapy (cART). In some aspects, the interferon-alpha binding protein is B18R. In some aspects, the compositions further comprise a pharmaceutically acceptable carrier. Disclosed are methods of treating a subject with HIV associated neurogenerative disorder (HAND) comprising administering a therapeutically effective amount of B18R and cART. Disclosed are methods of reversing behavioral abnormalities in subjects having HAND comprising administering a therapeutically effective amount of B18R.