Abstract
The reacting pattern of circulating filarial antigen fraction-2 fromWuchereria bancrofti and soluble antigen from adultBrugia malayi with bancroftian filarial sera were analysed by immunoblotting technique and enzyme linked immunosorbent assay. Microfilaraemic sera reacted specifically with proteins of molecular weight 200, 120, 97, 56, 54, 43, 26 and 17 kDa of circulating Filarial antigen fraction-2 and 44, 40, 38, 31, 22 and 18 kDa ofBrugia malayi adult soluble antigen. Clinical filarial sera identified protein molecules of 56, 54 and 42 kDa of circulating filarial antigen fraction-2 and 19, 16 and 14 kDa ofBrugia malayi adult soluble antigen. Some components of both the antigen preparation were also identified by endemic normal serai.e.proteins 120, 97, 62, 43 and 33 kDa of circulating filarial antigen fraction-2 and 170, 120, 43, 31 and 12 kDa ofBrugia malayi adult soluble antigen. One of the sodium dodecyl sulphate-polyacrylamide gel electropherosis fractions of circulating filarial antigen fraction-2 (CFA2-8) andBrugia malayi adult soluble antigen fraction-6 when used in enzyme linked immunosorbent assay could differentiate microfilaraemic sera from endemic normal and clinical filarial sera. The other antigen fractions (CFA2-2, 6 and 7 andBmA-2) showed a high geometric mean titre of filarial immunoglobulin G antibodies in endemic normal sera when compared to microfilaraemia and clinical filarial sera. These proteins need to be further studied to assess their involvement in protecting from filarial infection in an endemic area.
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Abbreviations
- CFA2 :
-
Circulating filarial antigen fraction-2
- BmA SDS-S Ag:
-
Brugia malayi adult SDS soluble antigen
- ELISA:
-
enzyme linked immunosorbent assay
- NCP:
-
nitrocellulose paper
- SMP:
-
skimmed milk powder
- CAM:
-
cellulose acetate membrane
- GMT:
-
geometrical mean titre
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Cheirmaraj, K., Reddy, M.V.R. & Harinath, B.C. Differential reactivity of filarial antigens with human sera from bancroftian filariasis endemic zone. J Biosci 16, 199–208 (1991). https://doi.org/10.1007/BF02703285
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DOI: https://doi.org/10.1007/BF02703285