Prognostic value of an elevated CD8 lymphocyte count in HIV infection. Results of a prospective study of 152 asymptomatic HIV-positive individuals

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Abstract
To evaluate the prognostic value of an elevated CD8 lymphocyte count in the early stages of HIV infection. A prospective study ongoing since January 1986. One hundred and fifty-two asymptomatic HIV-positive individuals with a CD4 lymphocyte count > 400 x 10(6)/l at enrollment were included. Disease progression was defined as a CD4 count < 200 x 10(6)/l. During the follow-up period, CD4 count decreased in 33 individuals; CD8 count increased to > 1500 x 10(6)/l in 38 individuals and doubled in 35. The risk of a decreasing CD4 count was estimated to be 1.7-fold higher, although not significantly so, after the elevation of the CD8 count to > 1500 x 10(6)/l than before or in the absence of such an increase. However, this predictive value disappeared when five baseline parameters found to predict the outcome (neopterin, beta 2-microglobulin, p24 antigen, anti-p18 antibody and immunoglobulin A) were adjusted. Elevated CD8 count appears to be a weak marker for disease progression.

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