Nursing PharmacologyAntiviral Drugs
Antiviral Drugs
Anti-viral drugs with activity against HIV (Human Immunodeficiency Virus)
HIV-1 Pathophysiology/Pathogenesis
Long-term Infection: Latency Phase (continued)
HIV-Latency: CD4+ T Cell Reservoir:
Although the most accepted point of view that continuing viral persistence in the presence of cART (HAART) drugs is due to memory CD4+ T cell reservoirs, other alternatives have been proposed.9
One such alternative suggests that continuing rounds of viral replication might occurring tissues where antiviral drug presence is reduced.
Overall, of the various possibilities most of the evidence suggest that residual viremia is due to episodic viral production from stable long-lived reservoirs by contrast to ongoing, albeit limited productive infection.9
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Replication-capable latent virus are present in about one in 1 million resting CD4+ T cells.9,11,12,13
An early assessment, based on the decay rate of the latent reservoir, indicated that latent cells which could produce replication-competent HIV virions exhibited a long half-life, about four years.
Using this turnover rate estimate, over 70 years of treatment would be required to eliminate the latent reservoir.
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