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Mansueto, S. et al.

Modifications of general parameters of immune activation in the sera of Sicilian patients with Boutonneuse fever.

The serum levels of beta2-microglobulin (beta2-M), soluble HLA class I antigen (sHLA-I), soluble CD4 (sCD4) and CD8 (sCD8) were studied in 98 Sicilian patients with Boutonneuse fever (BF). In different stages of infection all markers were significantly increased in sera from Sicilian patients with acute BF compared with healthy controls. sCD8 and sHLA-I reached the peak in the second week after the onset of symptoms, whereas sCD4 and beta2-M reached the peak in the first week. Afterwards sCD8 decreased to the levels of controls within the third week, the other parameters decreased later and were unmodified until the third week of infection. Significant correlations were found between sCD4 and sCD8 and the sIL-2R, as well as between serum levels of beta2-M and sCD8. The reduction of CD3+ and CD4+ and the increase of CD8+ T cells in the blood indicate that these cells are involved in the response to rickettsia, and their activation might be in part responsible for the release of sCD4 and sCD8. Our data suggest that these soluble markers, indexes of immune activation of T cells both in the circulation and the affected tissues, may be used in monitoring BF evolution.[1]

References

Modifications of general parameters of immune activation in the sera of Sicilian patients with Boutonneuse fever. Mansueto, S., Vitale, G., Mocciaro, C., Gambino, G., Colletti, P., Mansueto, P., Spinelli, A., Affronti, M., Chifari, N., Arcoleo, F., Milano, S., Cillari, E. Clin. Exp. Immunol. (1998) [Pubmed]

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