Perfil sorológico à LID-1 e PGL-I em pacientes com reação hansênica tipo I e tipo II e em pacientes não reacionais
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2014-02-21
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Universidade Federal de Goiás
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Introduction: Leprosy Type 1 ( T1R) and type 2 reactions ( T2R) are considered the major complicators in the clinical management of leprosy patients. Leprosy reactions can occur before, during or after multidrug therapy (MDT). T1R is associated with exacerbated Th1 type cell mediated immunity (CMI) whereas T2R is associated with Th2 type immunity characterized by strong antibody production and in some cases transitory CMI to M. leprae antigens.
Objective: Assess the serological reactivity to LID-1 fusion protein and to PGL-I M. leprae antigens among multibacillary (MB), paucibacillary (PB) leprosy patients that developed reaction at diagnosis or during MDT compared to reaction free MB and PB patients.
Material and Methods: Paired serum samples from 73 leprosy patients were tested by ELISA to detect IgG antibodies to LID-1 and IgM responses to PGL-I. Leprosy patients included MB that developed T1R or T2R at diagnosis or during MDT and PB patients that developed T1R at diagnosis or during MDT compared to reaction free MB and PB patients. For T1R and T2R patients, samples collected during reactions and in the absence of reactions were tested and for reaction free patients samples collected at diagnosis and after MDT were tested.
Results: The decline of anti LID-1 and anti PGL-I antibodies levels was significant among MB patients with T1R at diagnosis (p <0,05). Among MB patients with T2R at diagnosis and non reactional MB leprosy patients, the decline of antibodies was significant only to LID-1 (p <0,05). Higher levels of anti LID-1 antibodies were observed in MB patients who developed T2R at diagnosis compared with unreactional patients (p = 0.020) and patients who developed T1R at diagnosis (p = 0.008). Moreover, different antibody levels were seen in patients who developed T2R during MDT compared with unreactional MB patients after MDT (p = 0.020).
Conclusions: Our data suggest that high anti LID-1 antibody levels may be associated with higher risk of T2R in MB patients.
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MIZOGUTI, D. F. Perfil sorológico à LID-1 e PGL-I em pacientes com reação hansênica tipo I e tipo II e em pacientes não reacionais. 2013. 90 f. Dissertação (Mestrado em Medicina Tropical e Saúde Publica) - Universidade Federal de Goiás, Goiânia, 2014.