Residual HIV-1 RNA in blood plasma of patients taking suppressive highly active antiretroviral therapy.
BACKGROUND
Despite suppressive treatment with highly active antiretroviral therapy (HAART), replication-competent virus can still be isolated from peripheral blood mononuclear cells and genital cells of many individuals receiving suppressive HAART.


OBJECTIVE
To determine whether free virion RNA can be detected in the blood plasma and/or genital tract fluids from patients receiving suppressive HAART.


METHODS
Prospective cohort study conducted from November 1998 to May 1999.


METHODS
Academic medical center.


METHODS
Human immunodeficiency virus 1-infected individuals (20 men and 2 women) shown in our laboratories to have fewer than 50 copies/mL of HIV-1 RNA in peripheral blood plasma while taking suppressive HAART.


METHODS
Free virion RNA levels in peripheral blood plasma and genital fluids, quantified using an ultrasensitive reverse transcriptase polymerase chain reaction able to quantify cell-free virion RNA to a lower limit of 5 copies/mL and qualitatively detect viral RNA below this level.


RESULTS
In all 22 patients, residual viral RNA could be detected in the peripheral blood plasma (mean level, 17 copies/mL). The presence of viral RNA suggests that ongoing viral replication is occurring, albeit at low levels, in each patient evaluated. Viral RNA levels were lower in most patients' genital fluids compared with blood plasma and in 12 patients were undetectable.


CONCLUSIONS
These data suggest that low-level replication of HIV-1 in patients taking suppressive HAART may be demonstrated not only in peripheral blood mononuclear cells but also in peripheral plasma as cell-free virion RNA. Complete ablation of viral replication may require intensification of antiretroviral therapies beyond standard suppressive HAART.
Dornadula
G
G
Center for Human Virology, Department of Medicine, Jefferson Medical College, Thomas Jefferson University, Philadelphia, PA 19107, USA.
Zhang
H
H
VanUitert
B
B
Stern
J
J
Livornese
L
L
Ingerman
M J
MJ
Witek
J
J
Kedanis
R J
RJ
Natkin
J
J
DeSimone
J
J
Pomerantz
R J
RJ
D019380:Anti-HIV Agents / Q000627:therapeutic use*; D001826:Body Fluids / Q000821:virology; D004359:Drug Therapy, Combination; D005260:Female; D015658:HIV Infections / Q000097:blood* / Q000188:drug therapy* / Q000821:virology; D015497:HIV-1 / Q000235:genetics* / Q000502:physiology; D006801:Humans; D008297:Male; D011446:Prospective Studies; D012367:RNA, Viral / Q000032:analysis / Q000097:blood*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012661:Semen / Q000821:virology; D014621:Vagina; D014779:Virus Replication
D019380:Anti-HIV Agents; D012367:RNA, Viral