Evidence map›Paper›PMID 9826719›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America1998

Stochastic processes strongly influence HIV-1 evolution during suboptimal protease-inhibitor therapy.

M Nijhuis, C A Boucher, P Schipper, T Leitner, R Schuurman, J Albert

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 59 papers.

0numbers the graph read from it
0cells of the map it votes in
59citing papers in PubMed
2.5field-weighted citation impact, top 10% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

59 citing papers in PubMed, 160 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Trial
  4. Article
  5. Review
  6. Article
  7. The Puzzle of HIV Neutral and Selective Evolution.Molecular biology and evolution · 2018
    Article
  8. Article
  9. Article
  10. Review
  11. Phylogenetically resolving epidemiologic linkage.Proceedings of the National Academy of Sciences of the United States of America · 2016
    Article
  12. Article
  13. Genetic Consequences of Antiviral Therapy on HIV-1.Computational and mathematical methods in medicine · 2015
    Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. Stochastic effects are important in intrahost HIV evolution even when viral loads are high.Proceedings of the National Academy of Sciences of the United States of America · 2012
    Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 3 countries.

M NijhuisEijkman-Winkler Institute, Department of Virology, University Hospital Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands.
C A Boucher
P Schipper
T Leitner
R Schuurman
J Albert
Heidelberg University · DELos Alamos National Laboratory · USSwedish Institute · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

It has long been assumed that HIV-1 evolution is best described by deterministic evolutionary models because of the large population size. Recently, however, it was suggested that the effective population size (Ne) may be rather small, thereby allowing chance to influence evolution, a situation best described by a stochastic evolutionary model. To gain experimental evidence supporting one of the evolutionary models, we investigated whether the development of resistance to the protease inhibitor ritonavir affected the evolution of the env gene. Sequential serum samples from five patients treated with ritonavir were used for analysis of the protease gene and the V3 domain of the env gene. Multiple reverse transcription-PCR products were cloned, sequenced, and used to construct phylogenetic trees and to calculate the genetic variation and Ne. Genotypic resistance to ritonavir developed in all five patients, but each patient displayed a unique combination of mutations, indicating a stochastic element in the development of ritonavir resistance. Furthermore, development of resistance induced clear bottleneck effects in the env gene. The mean intrasample genetic variation, which ranged from 1.2% to 5.7% before treatment, decreased significantly (P < 0.025) during treatment. In agreement with these findings, Ne was estimated to be very small (500-15,000) compared with the total HIV-1 RNA copy number. This study combines three independent observations, strong population bottlenecking, small Ne, and selection of different combinations of protease-resistance mutations, all of which indicate that HIV-1 evolution is best described by a stochastic evolutionary model.

Indexed as

Genes, envAcquired Immunodeficiency SyndromeAmino Acid SequenceBase SequenceDNA PrimersDrug Resistance, MicrobialEvolution, MolecularGene Products, envGenetic VariationGenotypeHIV-1HIV Protease InhibitorsHumansMolecular Sequence DataPhylogenyReverse Transcriptase Polymerase Chain ReactionDNA PrimersGene Products, envHIV Protease InhibitorsRitonavir

Identifiers

PMID9826719
PMCPMC24392
OpenAlexW2106197195

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.