Biomaterial Database

Human immunodeficiency virus drug therapy and virus load. 1997

S Bonhoeffer, and J M Coffin, and M A Nowak

Wellcome Centre for the Epidemiology of Infectious Disease, Department of Zoology, University of Oxford, United Kingdom. seb@zoo.ox.ac.uk

Analysis of the short-term dynamics of human immunodeficiency virus (HIV) type 1 infection in response to drug therapy has elucidated crucial kinetic properties of viral dynamics in vivo (D. D. Ho et al., Nature 373:123-126, 1995; A. S. Perelson et al., Science 271:1582-1586, 1996; X. Wei et al., Nature 373:117-122, 1995). Here we investigated long-term changes in virus load in patients treated with a combination of lamivudine and zidovudine to identify principal factors responsible for the observed 10- to 100-fold sustained suppression of virus load in vivo. Interestingly, most standard accounts of virus dynamics cannot explain a large sustained reduction without shifting the virus very close to extinction. The effect can be explained by taking into consideration either (i) the immune response against HIV, (ii) the killing of uninfected CD4 cells, or (iii) the differential efficacies of the drugs in different cell populations.

UI	MeSH Term	Description	Entries
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D015215	Zidovudine	A dideoxynucleoside compound in which the 3'-hydroxy group on the sugar moiety has been replaced by an azido group. This modification prevents the formation of phosphodiester linkages which are needed for the completion of nucleic acid chains. The compound is a potent inhibitor of HIV replication, acting as a chain-terminator of viral DNA during reverse transcription. It improves immunologic function, partially reverses the HIV-induced neurological dysfunction, and improves certain other clinical abnormalities associated with AIDS. Its principal toxic effect is dose-dependent suppression of bone marrow, resulting in anemia and leukopenia.	AZT (Antiviral),Azidothymidine,3'-Azido-2',3'-Dideoxythymidine,3'-Azido-3'-deoxythymidine,AZT Antiviral,AZT, Antiviral,BW A509U,BWA-509U,Retrovir,3' Azido 2',3' Dideoxythymidine,3' Azido 3' deoxythymidine,Antiviral AZT,BWA 509U,BWA509U
D015497	HIV-1	The type species of LENTIVIRUS and the etiologic agent of AIDS. It is characterized by its cytopathic effect and affinity for the T4-lymphocyte.	Human immunodeficiency virus 1,HIV-I,Human Immunodeficiency Virus Type 1,Immunodeficiency Virus Type 1, Human
D015658	HIV Infections	Includes the spectrum of human immunodeficiency virus infections that range from asymptomatic seropositivity, thru AIDS-related complex (ARC), to acquired immunodeficiency syndrome (AIDS).	HTLV-III Infections,HTLV-III-LAV Infections,T-Lymphotropic Virus Type III Infections, Human,HIV Coinfection,Coinfection, HIV,Coinfections, HIV,HIV Coinfections,HIV Infection,HTLV III Infections,HTLV III LAV Infections,HTLV-III Infection,HTLV-III-LAV Infection,Infection, HIV,Infection, HTLV-III,Infection, HTLV-III-LAV,Infections, HIV,Infections, HTLV-III,Infections, HTLV-III-LAV,T Lymphotropic Virus Type III Infections, Human
D018894	Reverse Transcriptase Inhibitors	Inhibitors of reverse transcriptase (RNA-DIRECTED DNA POLYMERASE), an enzyme that synthesizes DNA on an RNA template.	Reverse Transcriptase Inhibitor,Inhibitors, Reverse Transcriptase,Inhibitor, Reverse Transcriptase,Transcriptase Inhibitor, Reverse
D019259	Lamivudine	A reverse transcriptase inhibitor and ZALCITABINE analog in which a sulfur atom replaces the 3' carbon of the pentose ring. It is used to treat HIV disease.	2',3'-Dideoxy-3'-thiacytidine,2(1H)-Pyrimidinone, 4-amino-1-(2-(hydroxymethyl)-1,3-oxathiolan-5-yl)-, (2R-cis)-,3TC Lamivudine,Lamivudine, (+)-cis-,Lamivudine, (+-)-trans-,BCH-189,Epivir,GR-109714X,GR109714X,Lamivudine, (2S-cis)-Isomer,2',3' Dideoxy 3' thiacytidine,BCH 189,BCH189,GR 109714X,Lamivudine, 3TC
D019380	Anti-HIV Agents	Agents used to treat AIDS and/or stop the spread of the HIV infection. These do not include drugs used to treat symptoms or opportunistic infections associated with AIDS.	AIDS Drug,AIDS Drugs,Anti-AIDS Agents,Anti-AIDS Drug,Anti-HIV Agent,Anti-HIV Drug,Anti-AIDS Drugs,Anti-HIV Drugs,Agent, Anti-HIV,Agents, Anti-AIDS,Agents, Anti-HIV,Anti AIDS Agents,Anti AIDS Drug,Anti AIDS Drugs,Anti HIV Agent,Anti HIV Agents,Anti HIV Drug,Anti HIV Drugs,Drug, AIDS,Drug, Anti-AIDS,Drug, Anti-HIV,Drugs, AIDS,Drugs, Anti-AIDS,Drugs, Anti-HIV
D019562	Viral Load	The quantity of measurable virus in a body fluid. Change in viral load, measured in plasma, is sometimes used as a SURROGATE MARKER in disease progression.	Viral Burden,Virus Titer,Burden, Viral,Load, Viral,Titer, Virus