- 作者：Ginger Lehrman ; Ian B Hogue ; Sarah Palmer ; Cheryl Jennings ; Celsa A Spina ; Ann Wiegand ; Alan L Landay ; Robert W Coombs ; Douglas D Richman ; John W Mellors et al.
- 刊名：The Lancet
- 出版年：2005
- 期刊代码：182_01406736
- 类别：med
- 出版时间：2005
- 卷：366
- 期：9485
- 页码：549-555
- 文件大小：96 K
Summary
BackgroundPersistent infection in resting CD4+ T cells prevents eradication of HIV-1. Since the chromatin remodeling enzyme histone deacetylase 1 (HDAC1) maintains latency of integrated HIV, we tested the ability of the HDAC inhibitor valproic acid to deplete persistent, latent infection in resting CD4+ T cells.Procedures
We did a proof-of-concept study in four volunteers infected with HIV and on highly-active antiretroviral therapy (HAART). After intensifying the effect of HAART with subcutaneous enfuvirtide 90 μg twice daily for 4–6 weeks to prevent the spread of HIV, we added oral valproic acid 500–750 mg twice daily to their treatment regimen for 3 months. We quantified latent infection of resting CD4+ T cells before and after augmented treatment by limiting-dilution culture of resting CD4+ T cells after ex-vivo activation.
Findings
The frequency of resting cell infection was stable before addition of enfuvirtide and valproic acid, but declined thereafter. This decline was significant in three of four patients (mean reduction 75%, range 68%to >84%). Patients had slight reactions to enfuvirtide at the injection site, but otherwise tolerated treatment well.
Interpretation
Combination therapy with an HDAC inhibitor and intensified HAART safely accelerates clearance of HIV from resting CD4+ T cells in vivo, suggesting a new and practical approach to eliminate HIV infection in this persistent reservoir. This finding, though not definitive, suggests that new approaches will allow the cure of HIV in the future.