The qualitative nature of the primary immune response to HIV infection is a prognosticator of disease progression independent of the initial level of plasma viremia - PubMed (original) (raw)
. 1997 Jan 7;94(1):254-8.
doi: 10.1073/pnas.94.1.254.
J F Demarest, T Schacker, M Vaccarezza, O J Cohen, M Daucher, C Graziosi, S S Schnittman, T C Quinn, G M Shaw, L Perrin, G Tambussi, A Lazzarin, R P Sekaly, H Soudeyns, L Corey, A S Fauci
Affiliations
- PMID: 8990195
- PMCID: PMC19306
- DOI: 10.1073/pnas.94.1.254
The qualitative nature of the primary immune response to HIV infection is a prognosticator of disease progression independent of the initial level of plasma viremia
G Pantaleo et al. Proc Natl Acad Sci U S A. 1997.
Abstract
Following infection of the host with a virus, the delicate balance between virus replication/spread and the immune response to the virus determines the outcome of infection, i.e., persistence versus elimination of the virus. It is unclear, however, what relative roles immunologic and virologic factors play during primary viral infection in determining the subsequent clinical outcome. By studying a cohort of subjects with primary HIV infection, it has been demonstrated that qualitative differences in the primary immune response to HIV, but not quantitative differences in the initial levels of viremia are associated with different clinical outcomes.
Figures
Figure 1
Analysis of the TCR repertoire during primary infection. The Vβ repertoire in freshly isolated unfractionated PBMC collected at different time points from the onset of symptoms was analyzed by a semi-quantitative PCR assay (21, 24). A minimum of a doubling in the relative expression of Vβ families among sequential time points was considered to be significant. (A) Vβ repertoire in patient 16, who is representative of the Type 1 pattern of Vβ perturbations. (B) Patient 8 is representative of Type 2 pattern. (C) Patients 18 (perturbations of multiple Vβs) and 21 (no detectable expansions) are representative of Type 3 pattern.
Figure 2
Analysis of the Vβ repertoire in 21 individuals with primary HIV infection. Patients are grouped on the basis of the three patterns (Type 1, Type 2, and Type 3) of Vβ perturbations. The results are shown only for those Vβs that were found significantly perturbed (>2-fold) during the longitudinal analysis; the numerical values shown corresponded to those detected at the time point in which the greatest change in fold increase was observed. The shaded box indicates that no significant changes were observed. (A) Results are expressed as fold increase and/or decline. (B) Percentages of the individual Vβs for which the changes in fold increase and/or decline have been shown in A. With regard to Vβ6 in patient 22, the percentage was very high (24%) at day 43, and progressively declined to 14% at day 106. Samples at later time points were not available; for this reason, the changes in Vβ6 were considered significant even if they were <2-fold. With regard to the changes of Vβ17 in patient 7, and Vβ8 in patients 15 and 18, the increments in the percentage of these Vβs were observed at later time points when the percentages of the other Vβs that were found to be perturbed had already declined. The Vβ repertoire was analyzed by a semi-quantitative PCR assay (21, 24, 29).
Figure 3
Analyses of CD4+ T cell decline over time in patients with Type 1, Type 2, and Type 3 patterns of Vβ perturbations. Each slope was obtained from the best-fit line derived from linear regression. Each data point is generated by the mean of the CD4+ T cell counts detected during that time period in the different patients belonging to the three patterns of Vβ perturbations. From the slope, minimum estimates of CD4+ T cell loss per week were obtained.
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