Date Published:

Jan

Abstract:

Investigating, predicting, diagnosing, and treating HIV-1-associated neurocognitive disorder (HAND) has been hindered by the lack of disease-related molecular markers. In this study, plasma from rhesus monkeys (n = 6), before and after infection with simian immunodeficiency virus (SIV), was profiled to obtain differential fingerprints in protein expression during SIV-induced central nervous system (CNS) disease. A quantitative proteomic analysis was performed by means of isobaric tag for relative and absolute quantification (iTRAQ) labeling, using multidimensional liquid chromatography tandem mass spectrometry (LC-MS/MS) run on a linear ion trap mass spectrometer in an integrated mode comprising pulsed-Q-dissociation (PQD) and CID. Among a panel of proteins showing differential expression following SIV infection, we identified afamin, a member of the albumin superfamily, to be significantly down regulated after infection. Validation by Western blot confirmed this observation and, given its potential implication in neuroprotection by transport of alpha-tocopherol (alphaTocH), provides new avenues into further understanding HIV induced CNS disease. iTRAQ-based LC-MS/MS provides a valuable platform for plasma protein profiling and has important implications in identifying molecular markers relevant for the pathogenesis of neurodegenerative diseases. Using such an approach, we show its successful application in identifying differential fingerprints in SIV/HIV induced CNS disease.

Notes:

Pendyala, GuruduttTrauger, Sunia ASiuzdak, GaryFox, Howard SP01 DA026146/DA/NIDA NIH HHS/P01 DA026146-02/DA/NIDA NIH HHS/P01DA026146/DA/NIDA NIH HHS/P30 MH062261/MH/NIMH NIH HHS/P30 MH062261-09/MH/NIMH NIH HHS/P30MH062261/MH/NIMH NIH HHS/R01 MH073490/MH/NIMH NIH HHS/R01 MH073490-06/MH/NIMH NIH HHS/J Proteome Res. 2010 Jan;9(1):352-8. doi: 10.1021/pr900685u.