Variants of the Plasmodium vivax circumsporozoite protein (VK210 and VK247) in Colombian isolates
Mem. Inst. Oswaldo Cruz
;
96(5): 709-712, July 2001. mapas, tab
Article
in English
| LILACS
| ID: lil-289362
RESUMO
Phenotypic diversity has been described in the central repeated region of the circumsporozoite protein (CSP) from Plasmodium vivax. Two sequences VK210 (common) and VK247 (variant) have been found widely distributed in P. vivax isolates from several malaria endemic areas around the world. A third protein variant called P. vivax-like showing a sequence similar to the simian parasite P. simio-ovale has also been described. Here, using an immunofluorescent test and specific monoclonal antibodies, we assessed the presence of two of these protein variants (VK210 and VK247) in laboratory produced sporozoite. Both sequences were found in parasite isolates coming from different geographic regions of Colombia. Interestingly, sporozoites carrying the VK247 sequence were more frequently produced in Anopheles albimanus than sporozoites with the VK210 sequence. This difference in sporozoites production was statistically significant (p <0.05, Kruskal-Wallis); not correlation was found with parameters as the total number of parasites or gametocytes in blood from human donors used to feed mosquitoes. Previous studies in the same region have shown a higher prevalence of anti-VK210 antibodies which in theory may suggest their role in blocking the development of sporozoites carrying the CSP VK210 sequence
Full text:
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Index:
LILACS (Americas)
Main subject:
Plasmodium vivax
/
Genetic Variation
/
Protozoan Proteins
Type of study:
Risk factors
Limits:
Animals
/
Female
/
Humans
Country/Region as subject:
South America
/
Colombia
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
2001
Type:
Article
/
Project document
Affiliation country:
Colombia
Institution/Affiliation country:
Universidad del Valle/CO
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