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• W2000834843 abstract "In early human immunodeficiency virus (HIV) infection, the virus population escapes from multiple CD8(+) cell responses. The later an escape mutation emerges, the slower it outgrows its competition, i.e., the escape rate is lower. This pattern could indicate that the strength of the CD8(+) cell responses is waning, or that later viral escape mutants carry a larger fitness cost. In this paper, we investigate whether the pattern of decreasing escape rates could also be caused by genetic interference among different escape strains. To this end, we developed a mathematical multi-epitope model of HIV dynamics, which incorporates stochastic effects, recombination, and mutation. We used cumulative linkage disequilibrium measures to quantify the amount of interference. We found that nearly synchronous, similarly strong immune responses in two-locus systems enhance the generation of genetic interference. This effect, combined with a scheme of densely spaced sampling times at the beginning of infection and sparse sampling times later, leads to decreasing successive escape rate estimates, even when there were no selection differences among alleles. These predictions are supported by empirical data from one HIV-infected patient. Thus, interference could explain why later escapes are slower. Considering escape mutations in isolation, neglecting their genetic linkage, conceals the underlying haplotype dynamics and can affect the estimation of the selective pressure exerted by CD8(+) cells. In systems in which multiple escape mutations appear, the occurrence of interference dynamics should be assessed by measuring the linkage between different escape mutations." @default.
• W2000834843 created "2016-06-24" @default.
• W2000834843 creator A5009994638 @default.
• W2000834843 creator A5018865175 @default.
• W2000834843 date "2015-01-13" @default.
• W2000834843 modified "2023-10-18" @default.
• W2000834843 title "The Effect of Interference on the CD8+ T Cell Escape Rates in HIV" @default.
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• W2000834843 doi "https://doi.org/10.3389/fimmu.2014.00661" @default.
• W2000834843 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4292734" @default.
• W2000834843 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25628620" @default.
• W2000834843 hasPublicationYear "2015" @default.
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