Lymphocyte kinetics and precursor frequency-dependent recovery of CD4(+)CD45RA(+)CD62L(+) naive T cells following triple-drug therapy for HIV type 1 infection
Rl. Hengel et al., Lymphocyte kinetics and precursor frequency-dependent recovery of CD4(+)CD45RA(+)CD62L(+) naive T cells following triple-drug therapy for HIV type 1 infection, AIDS RES H, 15(5), 1999, pp. 435-443
New therapeutic regimens have dramatically altered morbidity and mortality
attributed to HIV-1 infection. Changes in lymphocyte subsets after treatmen
t may mirror salutary clinical changes. Over 4 months we analyzed lymphocyt
e subsets in 20 patients starting new HIV-1 therapy. Absolute numbers of ly
mphocytes, CD4(+) T cells, CD8(+) T cells, and B cells increased significan
tly by 4 months, but CD8(+) T cell and B cell increases were restricted to
late-stage patients. Subset analysis revealed that the magnitude of recover
ing naive-phenotype CD4(+) T cells (slope) correlated with the number of th
ese cells present at baseline, equaling or exceeding the memory-phenotype s
lope within days if these naive cells were abundant at baseline. Five of 10
patients in whom naive-phenotype CD4(+) T cells were absent at baseline pa
rtially repopulated these cells by 4 months. These findings have important
implications for the origin and mechanisms of renewal of naive-phenotype CD
4(+) T cells following effective treatment for HIV-1 infection.