Western blot diagnosis of vivax malaria with multiple stage-specific antigens of the parasite
The Korean Journal of Parasitology
;
: 171-176, 2001.
Article
in English
| WPRIM
| ID: wpr-94815
ABSTRACT
Western blot analysis was performed to diagnose vivax malaria using stage-specific recombinant antigens. Genomic DNA from the whole blood of a malaria patient was used as templates to amplify the coding regions for the antigenic domains of circumsporozoite protein (CSP-1), merozoite surface protein (MSP-1), apical merozoite antigen (AMA-1), serine repeat antigen (SERA), and exported antigen (EXP-1) of Plasmodium vivax. Each amplified DNA fragment was inserted into a pGEX-4T plasmid to induce the expression of GST fusion protein in Escherichia coli by IPTG. The bacterial cell extracts were separated on 10% SDS-PAGE followed by western blot analysis with patient sera which was confirmed by blood smear examination. When applied with patient sera, 147 (91.9%) out of 160 vivax malaria, 12 (92.3%) out of 13 falciparum malaria, and all 9 vivax/falciparum mixed malaria reacted with at least one antigen, while no reactions occurred with 20 normal uninfected sera. In the case of vivax malaria, CSP-1 reacted with 128 (80.0%) sera, MSP-1 with 102 (63.8%), AMA-1 with 128 (80.0%), SERA with 115 (71.9%), and EXP-1 with 89 (55.6%), respectively. We obtained higher detection rates when using 5 antigens (91.9%) rather than using each antigen solely (55.6-80%), a combination of 2 (76.3-87.5%), 3 (85.6-90.6%), or 4 antigens (89.4-91.3%). This method can be applied to serological diagnosis, mass screening in endemic regions, or safety test in transfusion of prevalent vivax malaria.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Plasmodium vivax
/
Recombinant Proteins
/
Serologic Tests
/
Biomarkers
/
Mass Screening
/
Blotting, Western
/
Malaria, Vivax
/
Life Cycle Stages
/
Antigens, Protozoan
Type of study:
Diagnostic study
/
Prognostic study
/
Screening study
Limits:
Animals
/
Humans
Language:
English
Journal:
The Korean Journal of Parasitology
Year:
2001
Type:
Article
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