Determinants of variant surface antigen antibody response in severe Plasmodium falciparum malaria in an area of low and unstable malaria transmission

T M E A-Elgadir; T G Theander; G Elghazali; M A Nielsen; I E A-Elbasit; I Adam; M Troye-Blomberg; M I Elbashir; H A Giha

doi:10.1111/j.1365-3083.2006.01732.x

Determinants of variant surface antigen antibody response in severe Plasmodium falciparum malaria in an area of low and unstable malaria transmission

T M E A-Elgadir, T G Theander, G Elghazali, M A Nielsen, I E A-Elbasit, I Adam, M Troye-Blomberg, M I Elbashir, H A Giha

Centre for Medical Parasitology

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

4 Citationer (Scopus)

Abstract

Udgivelsesdato: 2006-Mar

Originalsprog	Engelsk
Tidsskrift	Scandinavian Journal of Immunology
Vol/bind	63
Udgave nummer	3
Sider (fra-til)	232-40
Antal sider	8
ISSN	0300-9475
DOI	https://doi.org/10.1111/j.1365-3083.2006.01732.x
Status	Udgivet - 2006

Bibliografisk note

Keywords: Adolescent; Age Factors; Anemia; Animals; Antibodies, Protozoan; Antibody Formation; Antibody Specificity; Antigen-Antibody Reactions; Antigens, Protozoan; Antigens, Surface; Child; Child, Preschool; Disease Transmission; Humans; Malaria, Cerebral; Malaria, Falciparum; Plasmodium falciparum

Adgang til dokumentet

10.1111/j.1365-3083.2006.01732.x

Citationsformater

A-Elgadir, T. M. E., Theander, T. G., Elghazali, G., Nielsen, M. A., A-Elbasit, I. E., Adam, I., Troye-Blomberg, M., Elbashir, M. I., & Giha, H. A. (2006). Determinants of variant surface antigen antibody response in severe Plasmodium falciparum malaria in an area of low and unstable malaria transmission. Scandinavian Journal of Immunology, 63(3), 232-40. https://doi.org/10.1111/j.1365-3083.2006.01732.x

Determinants of variant surface antigen antibody response in severe Plasmodium falciparum malaria in an area of low and unstable malaria transmission. / A-Elgadir, T M E; Theander, T G; Elghazali, G; Nielsen, M A; A-Elbasit, I E; Adam, I; Troye-Blomberg, M; Elbashir, M I; Giha, H A.

I: Scandinavian Journal of Immunology, Bind 63, Nr. 3, 2006, s. 232-40.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

A-Elgadir, TME, Theander, TG, Elghazali, G, Nielsen, MA, A-Elbasit, IE, Adam, I, Troye-Blomberg, M, Elbashir, MI & Giha, HA 2006, 'Determinants of variant surface antigen antibody response in severe Plasmodium falciparum malaria in an area of low and unstable malaria transmission', Scandinavian Journal of Immunology, bind 63, nr. 3, s. 232-40. https://doi.org/10.1111/j.1365-3083.2006.01732.x

@article{c9b47260a0d411dd86a6000ea68e967b,

title = "Determinants of variant surface antigen antibody response in severe Plasmodium falciparum malaria in an area of low and unstable malaria transmission",

abstract = "The variant surface antigens (VSA) of infected erythrocytes are important pathogenic markers, a set of variants (VSA(SM)), were assumed to be associated with severe malaria (SM), while SM constitutes clinically diverse forms, such as, severe malarial anemia (SMA) and cerebral malaria (CM). This study was conducted in Eastern Sudan, an area of seasonal and unstable malaria transmission. Parasites and plasma were obtained from patients with different clinical grades of malaria, and flow cytometry was used for analysis of VSA antibody (Ab) response. We found that individuals recognized a broader range of isolates had a higher level of VSA Ab against the recognized isolates (correlation coefficient, 0.727, P<0.001). Unexpectedly, at the time of malaria diagnosis, plasma from patients with CM recognized a significantly larger number of isolates than did the plasma from patients with SMA (P<0.001). Parasites obtained from patients with SMA or from children were better recognized than isolates obtained from patients with uncomplicated malaria or from adults, P<0.001, P=0.021, respectively. Taken together, the above findings suggest that the limitations in the VSA immunoglobulin G repertoire were most probably contributing to the pathogenesis of SMA but not to that of CM.",

author = "A-Elgadir, {T M E} and Theander, {T G} and G Elghazali and Nielsen, {M A} and A-Elbasit, {I E} and I Adam and M Troye-Blomberg and Elbashir, {M I} and Giha, {H A}",

note = "Keywords: Adolescent; Age Factors; Anemia; Animals; Antibodies, Protozoan; Antibody Formation; Antibody Specificity; Antigen-Antibody Reactions; Antigens, Protozoan; Antigens, Surface; Child; Child, Preschool; Disease Transmission; Humans; Malaria, Cerebral; Malaria, Falciparum; Plasmodium falciparum",

year = "2006",

doi = "10.1111/j.1365-3083.2006.01732.x",

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volume = "63",

pages = "232--40",

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T1 - Determinants of variant surface antigen antibody response in severe Plasmodium falciparum malaria in an area of low and unstable malaria transmission

AU - A-Elgadir, T M E

AU - Theander, T G

AU - Elghazali, G

AU - Nielsen, M A

AU - A-Elbasit, I E

AU - Adam, I

AU - Troye-Blomberg, M

AU - Elbashir, M I

AU - Giha, H A

N1 - Keywords: Adolescent; Age Factors; Anemia; Animals; Antibodies, Protozoan; Antibody Formation; Antibody Specificity; Antigen-Antibody Reactions; Antigens, Protozoan; Antigens, Surface; Child; Child, Preschool; Disease Transmission; Humans; Malaria, Cerebral; Malaria, Falciparum; Plasmodium falciparum

PY - 2006

Y1 - 2006

N2 - The variant surface antigens (VSA) of infected erythrocytes are important pathogenic markers, a set of variants (VSA(SM)), were assumed to be associated with severe malaria (SM), while SM constitutes clinically diverse forms, such as, severe malarial anemia (SMA) and cerebral malaria (CM). This study was conducted in Eastern Sudan, an area of seasonal and unstable malaria transmission. Parasites and plasma were obtained from patients with different clinical grades of malaria, and flow cytometry was used for analysis of VSA antibody (Ab) response. We found that individuals recognized a broader range of isolates had a higher level of VSA Ab against the recognized isolates (correlation coefficient, 0.727, P<0.001). Unexpectedly, at the time of malaria diagnosis, plasma from patients with CM recognized a significantly larger number of isolates than did the plasma from patients with SMA (P<0.001). Parasites obtained from patients with SMA or from children were better recognized than isolates obtained from patients with uncomplicated malaria or from adults, P<0.001, P=0.021, respectively. Taken together, the above findings suggest that the limitations in the VSA immunoglobulin G repertoire were most probably contributing to the pathogenesis of SMA but not to that of CM.

AB - The variant surface antigens (VSA) of infected erythrocytes are important pathogenic markers, a set of variants (VSA(SM)), were assumed to be associated with severe malaria (SM), while SM constitutes clinically diverse forms, such as, severe malarial anemia (SMA) and cerebral malaria (CM). This study was conducted in Eastern Sudan, an area of seasonal and unstable malaria transmission. Parasites and plasma were obtained from patients with different clinical grades of malaria, and flow cytometry was used for analysis of VSA antibody (Ab) response. We found that individuals recognized a broader range of isolates had a higher level of VSA Ab against the recognized isolates (correlation coefficient, 0.727, P<0.001). Unexpectedly, at the time of malaria diagnosis, plasma from patients with CM recognized a significantly larger number of isolates than did the plasma from patients with SMA (P<0.001). Parasites obtained from patients with SMA or from children were better recognized than isolates obtained from patients with uncomplicated malaria or from adults, P<0.001, P=0.021, respectively. Taken together, the above findings suggest that the limitations in the VSA immunoglobulin G repertoire were most probably contributing to the pathogenesis of SMA but not to that of CM.

U2 - 10.1111/j.1365-3083.2006.01732.x

DO - 10.1111/j.1365-3083.2006.01732.x

M3 - Journal article

C2 - 16499577

VL - 63

SP - 232

EP - 240

JO - Scandinavian Journal of Immunology, Supplement

JF - Scandinavian Journal of Immunology, Supplement

SN - 0301-6323

IS - 3

ER -