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Antigenic differences among Leishmania amazonensis isolates and their relationship with distinct clinical forms of the disease.

Abstract：

:Immunoblot analysis was used to investigate antigenic differences among clinical isolates of Leishmania amazonensis and their role in the etiology of the disease. Western blots of promastigote homogenates were analyzed with either monoclonal antibodies (MAbs) specific for the L. mexicana complex (M-4, M-6, M-9, and M-11) or polyclonal sera from L. amazonensis infected patients with the various forms of clinical disease. In the case of the MAbs, no significant variation was observed among the strains of L. amazonensis, isolated from cases of cutaneous leishmaniasis (CL), mucocutaneous leishmaniasis (MCL), diffuse cutaneous leishmaniasis (DCL), visceral leishmaniasis (VL) or post kala-azar dermal leishmaniasis (PKDL), in either the relative mobility (Mr) or the quantitative amount (intensity) of the antigenic determinants. In the case of the sera of the infected patients, the patterns of antigenic reactivity of these strains revealed that, despite showing the presence of shared antigens, differences were observed between some of the antigenic components of the various isolates of L. amazonensis that were recognized by a single serum. Differences were also demonstrated between the antigenic determinants of a single isolate of L. amazonensis that were recognized by the different patients' sera. No apparent association was consistently found, however, between the Mr components identified in these isolates and the clinical form of the disease or the geographical area of isolation. In addition, the spectrum of antigens recognized by the sera from patients with the same clinical form were not identical; although in some instances, similar Mr antigens were shared.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

Mem Inst Oswaldo Cruz

journal_title

Memorias do Instituto Oswaldo Cruz

authors

Leon LL,Machado GM,Barral A,de Carvalho-Paes LE,Grimaldi Júnior G

doi

10.1590/s0074-02761992000200010

subject

Has Abstract

pub_date

1992-04-01 00:00:00

pages

229-34

issue

eissn

0074-0276

issn

1678-8060

pii

S0074-02761992000200010

journal_volume

pub_type

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Antigenic differences among Leishmania amazonensis isolates and their relationship with distinct clinical forms of the disease.