Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/112463
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Type: Journal article
Title: Ex vivo response to histone deacetylase (HDAC) inhibitors of the HIV long terminal repeat (LTR) derived from HIV-infected patients on antiretroviral therapy
Author: Lu, H.
Gray, L.
Wightman, F.
Ellenberg, P.
Khoury, G.
Cheng, W.-.J.
Mota, T.
Wesselingh, S.
Gorry, P.
Cameron, P.
Churchill, M.
Lewin, S.
Citation: PLoS ONE, 2014; 9(11):e113341-1-e113341-9
Publisher: Public Library of Science (PLoS)
Issue Date: 2014
ISSN: 1932-6203
1932-6203
Statement of
Responsibility: 
Hao K. Lu, Lachlan R. Gray, Fiona Wightman, Paula Ellenberg, Gabriela Khoury, Wan-Jung Cheng, Talia M. Mota, Steve Wesselingh, Paul R. Gorry, Paul U. Cameron, Melissa J. Churchill, Sharon R. Lewin
Abstract: Histone deacetylase inhibitors (HDACi) can induce human immunodeficiency virus (HIV) transcription from the HIV long terminal repeat (LTR). However, ex vivo and in vivo responses to HDACi are variable and the activity of HDACi in cells other than T-cells have not been well characterised. Here, we developed a novel assay to determine the activity of HDACi on patient-derived HIV LTRs in different cell types. HIV LTRs from integrated virus were amplified using triple-nested Alu-PCR from total memory CD4+ T-cells (CD45RO+) isolated from HIV-infected patients prior to and following suppressive antiretroviral therapy. NL4-3 or patient-derived HIV LTRs were cloned into the chromatin forming episomal vector pCEP4, and the effect of HDACi investigated in the astrocyte and epithelial cell lines SVG and HeLa, respectively. There were no significant differences in the sequence of the HIV LTRs isolated from CD4+ T-cells prior to and after 18 months of combination antiretroviral therapy (cART). We found that in both cell lines, the HDACi panobinostat, trichostatin A, vorinostat and entinostat activated patient-derived HIV LTRs to similar levels seen with NL4-3 and all patient derived isolates had similar sensitivity to maximum HDACi stimulation. We observed a marked difference in the maximum fold induction of luciferase by HDACi in HeLa and SVG, suggesting that the effect of HDACi may be influenced by the cellular environment. Finally, we observed significant synergy in activation of the LTR with vorinostat and the viral protein Tat. Together, our results suggest that the LTR sequence of integrated virus is not a major determinant of a functional response to an HDACi.
Keywords: T-Lymphocytes
Description: Published November 19, 2014
Rights: © 2014 Lu et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
RMID: 0030089303
DOI: 10.1371/journal.pone.0113341
Grant ID: http://purl.org/au-research/grants/nhmrc/1009533
http://purl.org/au-research/grants/nhmrc/1051093
http://purl.org/au-research/grants/nhmrc/606967
http://purl.org/au-research/grants/nhmrc/579719
Appears in Collections:Medicine publications

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