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2006: Hasson Hamid; Biswas Priscilla; Galli Laura; Burastero Samuele E; Danise Anna; Bigoloni Alba; Carini Elisabetta; Locatelli Massimo; Vecchi Andrea; Lazzarin Adriano; Castagna Antonella
Selective increase in serum IgE following enfuvirtide administration in HIV-1 infected multidrug resistant patients.
The new microbiologica : official journal of the Italian Society for Medical, Odontoiatric, and Clinical Microbiology (SIMMOC) 2006;29(4):223-30.
Enfuvirtide (ENF) is the first HIV-1 entry inhibitor used in clinical practice and is currently administered via the subcutaneous route. We here evaluated whether ENF administration leads to a change in humoral parameters, including IgE, possibly related to ENF-associated injection site reactions (ISRs). A 24-week prospective study was conducted in multidrug resistant patients enrolled in the ENF Early Access Program characterized by CD4 counts < or =100 cells/microlitre and no other active antiretroviral drug. Licensed commercial laboratory assays were used to measure the parameters considered in this study. Results are reported as medians (interquartiles IQR). Statistical analyses were performed using Wilcoxon sign rank, Wilcoxon rank sum and Kruskall Wallis tests. Total IgM, IgA and IgG did not change significantly throughout the study. Conversely, a significant increase in IgE was observed in all patients, in those with normal as well as in those with altered IgE at baseline (BL). ISRs such as induration and number of nodules were more frequent in patients with altered BL IgE. IgE increased significantly in all patients, regardless of the different stratifications in their BL CD4 counts. Of note, the ENF-induced increase in CD4 occurred significantly in all patients, independently of their BL IgE levels. The immunological response associated with ENF treatment is accompanied by a selective increase in IgE levels. Determination of IgE could be used in the monitoring ISRs associated with ENE

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