Acquired antibody responses against merozoite surface protein-1 19 antigen during Plasmodium falciparum and P.vivax infections in South Indian city of Mangaluru.

Autor: Punnath K; Department of Biochemistry, Kuvempu University, Shankaraghatta, Shivamogga District, Karnataka India.; Department of Biochemistry, K.S. Hegde Medical Academy, NITTE (Deemed to be University), Mangaluru, India., Dayanand KK; Department of Biochemistry, Kuvempu University, Shankaraghatta, Shivamogga District, Karnataka India.; Department of Biochemistry, K.S. Hegde Medical Academy, NITTE (Deemed to be University), Mangaluru, India., Midya V; Department of Biostatistics and Bioinformatics, The Pennsylvania State University College of Medicine, 500 University Drive, Hershey, PA USA., Chandrashekar VN; Department of Biochemistry, Kuvempu University, Shankaraghatta, Shivamogga District, Karnataka India.; Department of Biochemistry, K.S. Hegde Medical Academy, NITTE (Deemed to be University), Mangaluru, India., Achur RN; Department of Biochemistry, Kuvempu University, Shankaraghatta, Shivamogga District, Karnataka India., Kakkilaya SB; Light House Polyclinic, Light House Hill Road, Mangaluru, Karnataka India., Ghosh SK; Department of Molecular Parasitology, ICMR-National Institute of Malaria Research, Poojanahalli, Bangalore, India., Kumari SN; Department of Biochemistry, K.S. Hegde Medical Academy, NITTE (Deemed to be University), Mangaluru, India., Gowda DC; Department of Biochemistry and Molecular Biology, The Pennsylvania State University College of Medicine, 500 University Drive, Hershey, PA USA.
Jazyk: angličtina
Zdroj: Journal of parasitic diseases : official organ of the Indian Society for Parasitology [J Parasit Dis] 2021 Mar; Vol. 45 (1), pp. 176-190. Date of Electronic Publication: 2020 Oct 21.
DOI: 10.1007/s12639-020-01288-4
Abstrakt: Merozoite surface protein-1 (MSP-1) of malaria parasites has been extensively studied as a malaria vaccine candidate and the antibody response to this protein is an important indicator of protective immunity to malaria. Mangaluru city and its surrounding areas in southwestern India are endemic to malaria with Plasmodium vivax being the most widespread and prevalent species although P. falciparum also frequently infects. However, no information is available on the level of protective immunity in this population. In this regard, a prospective hospital-based study was performed in malarial patients to assess antibody responses against the 19-kDa C-terminal portion of P. vivax and P. falciparum MSP-1 (MSP-1 19 ). Serum samples from 51 healthy endemic controls and 267 infected individuals were collected and anti-MSP-1 19 antibody levels were analyzed by ELISA. The possible association between the antibody responses and morbidity parameters such as malarial anemia and thrombocytopenia was investigated. Among the 267 infected cases, 144 had P. vivax and 123 had P. falciparum infections. Significant levels of anti-MSP-1 19 antibody were observed both in P. vivax (123/144; 85.4%) and P . falciparum (108/123; 87.9%) infected individuals. In both type of infections, the major antibody isotypes were IgG1 and IgG3. The IgG levels were found to be increased in patients with severe anemia and thrombocytopenia. The antibody levels were also higher in infected individuals who had several previous infections, although antibodies produced during previous infections were short lived. The predominance of cytophilic anti-MSP-1 19 IgG1 and IgG3 antibodies suggests the possibility of a dual role of Pv MSP-1 19 and Pf MSP-1 19 during malarial immunity and pathogenesis.
Competing Interests: Conflict of interestAll authors declare that they have no conflict of interest.
(© Indian Society for Parasitology 2020.)
Databáze: MEDLINE
Externí odkaz: