Services on Demand
On-line version ISSN 1678-8060
Mem. Inst. Oswaldo Cruz vol.89 no.2 Rio de Janeiro Apr./Jun. 1994
Cytokine responses to Dengue Infection among Puerto Rican Patients
Centers for Disease Control and Preventation, National Center for Infectious Diseases, Division of Vector-Borne Infectious Diseases, USA
Recently, a strong correlation between high concentration of tumor necrosis factor (TNFα) in blood and severity of dengue hemorrhagic fever/dengue shock syndrome has been reported from Asia and the Pacific. We wished to determine if a similar relationship could be found in dengue patients in the Americas where adult patients with severe syndromes have been observed more frequently than in Asia where severe cases have been observed mostly among children. The concentrations of interleukin-1 (IL-1beta) in hospistalized adult groups were significantly lower than that in outpatient adults. In contrast, the levels of interleukin 6 (IL-6) were significantly higher in hospistalized adults and children than in the corresponding outpatients. Levels of TNFα were higher in hospistalized children than in outpatient children or hospistalized adults. There was no significant difference in the levels of these three cytokines among hospitalized patients with or without hemorrhagic manifestations. Thus, an elevated IL-6 level was positively associated with severity of dengue infection in both children and adults, but IL-1beta level was negatively associated with severity in adults.
Key words: cytokine; interleukin-1; interleukin-6; tumor necrosis factor