Detection of immunogenic proteins from Anopheles sundaicus salivary glands in the human serum.

Abstract:

INTRODUCTION:The saliva of mosquitoes has an important role in the transmission of several diseases, including malaria, and contains substances with vasomodulating and immunomodulating effects to counteract the host physiological mechanisms and enhance pathogen transmission. As immunomodulatory components, salivary gland proteins can induce the generation of specific IgG antibodies in the host, which can be used as specific biomarkers of exposure to Anopheles sundaicus . The objective of this study was to identify immunogenic proteins from the salivary glands of Anopheles sundaicus by reaction with sera from individuals living in malaria-endemic areas who are thus exposed to Anopheles mosquitoes. METHODS:IgG antibodies targeting salivary gland proteins in serum samples from individuals living in malaria-endemic areas were measured by enzyme-linked immunosorbent assay (ELISA). Sera from healthy individuals living in non-endemic areas were used as negative controls. Determination of the presence of salivary gland immunogenic proteins was carried out by western blotting. RESULTS:Sixteen bands appeared in sodium dodecyl sulfate polyacrylamide gel electrophoresis, with molecule weights ranging from 22 to 144kDa. Among the exposed individuals, IgG responses to salivary gland proteins were variable. Protein bands with molecular weights of 46, 41, 33, and 31kDa were the most immunogenic. These immunogenic proteins were consistently recognized by pooled serum and individual samples from people living in malaria-endemic areas but not by negative controls. CONCLUSIONS:These results support the potential use of immunogenic proteins from the salivary glands of Anopheles as candidate markers of bite exposure or in malaria vaccines.

journal_name

Rev Soc Bras Med Trop

authors

Armiyanti Y,Nuryady MM,Arifianto RP,Nurmariana E,Senjarini K,Fitri LE,Sardjono TW

doi

10.1590/0037-8682-0185-2015

subject

Has Abstract

pub_date

2015-07-01 00:00:00

pages

410-6

issue

4

eissn

0037-8682

issn

1678-9849

pii

S0037-86822015000400410

journal_volume

48

pub_type

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