Rosette Formation in Plasmodium falciparum Isolates and Anti-Rosette Activity of Sera from Gambians with Cerebral or Uncomplicated Malaria

Carl-Johan Treutiger Department of Immunology, Stockholm University, Department of Infectious Disease, Karolinska Institute, Roslagstull Hospital, Uppsala University, Institute of Molecular Medicine, John Radcliffe Hospital, Medical Research Council Laboratories, Stockholm, Sweden

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Iris Hedlund Department of Immunology, Stockholm University, Department of Infectious Disease, Karolinska Institute, Roslagstull Hospital, Uppsala University, Institute of Molecular Medicine, John Radcliffe Hospital, Medical Research Council Laboratories, Stockholm, Sweden

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Helena Helmby Department of Immunology, Stockholm University, Department of Infectious Disease, Karolinska Institute, Roslagstull Hospital, Uppsala University, Institute of Molecular Medicine, John Radcliffe Hospital, Medical Research Council Laboratories, Stockholm, Sweden

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Johan Carlson Department of Immunology, Stockholm University, Department of Infectious Disease, Karolinska Institute, Roslagstull Hospital, Uppsala University, Institute of Molecular Medicine, John Radcliffe Hospital, Medical Research Council Laboratories, Stockholm, Sweden

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Annette Jepson Department of Immunology, Stockholm University, Department of Infectious Disease, Karolinska Institute, Roslagstull Hospital, Uppsala University, Institute of Molecular Medicine, John Radcliffe Hospital, Medical Research Council Laboratories, Stockholm, Sweden

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Patrick Twumasi Department of Immunology, Stockholm University, Department of Infectious Disease, Karolinska Institute, Roslagstull Hospital, Uppsala University, Institute of Molecular Medicine, John Radcliffe Hospital, Medical Research Council Laboratories, Stockholm, Sweden

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Dominic Kwiatkowski Department of Immunology, Stockholm University, Department of Infectious Disease, Karolinska Institute, Roslagstull Hospital, Uppsala University, Institute of Molecular Medicine, John Radcliffe Hospital, Medical Research Council Laboratories, Stockholm, Sweden

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Brian M. Greenwood Department of Immunology, Stockholm University, Department of Infectious Disease, Karolinska Institute, Roslagstull Hospital, Uppsala University, Institute of Molecular Medicine, John Radcliffe Hospital, Medical Research Council Laboratories, Stockholm, Sweden

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Mats Wahlgren Department of Immunology, Stockholm University, Department of Infectious Disease, Karolinska Institute, Roslagstull Hospital, Uppsala University, Institute of Molecular Medicine, John Radcliffe Hospital, Medical Research Council Laboratories, Stockholm, Sweden

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DOI:
https://doi.org/10.4269/ajtmh.1992.46.503
Volume/Issue:
Volume 46: Issue 5
Page(s):
503–510
Restricted access
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The ability of Plasmodium falciparum-infected red blood cells (RBC) to form spontaneous erythrocyte rosettes was studied in 130 fresh isolates from Gambian children with cerebral or uncomplicated malaria from August to November 1990. All isolates (24 of 24) from patients with cerebral malaria formed rosettes, but only 61 of 106 isolates from children with uncomplicated malaria formed rosettes. The mean rate of rosette formation in isolates from children with cerebral malaria (28.3%) was significantly greater than that in isolates from children with uncomplicated malaria (8.5%). Giant rosettes were more frequently formed in isolates from patients with cerebral malaria than in those from patients with uncomplicated malaria. Sera of children with cerebral disease generally lacked anti-rosette activity, while many sera from children with uncomplicated malaria showed strong anti-rosette activity when tested against the patients' own parasites. Some sera that were devoid of autologous rosette-disrupting activity were able to disrupt rosettes formed in other isolates, indicating the presence of different rosette formation mechanisms. Forty percent (6 of 15) of the sera from patients with cerebral malaria caused microagglutination of the patients' own uninfected and infected RBC, while only 10% (3 of 31) of sera from children with uncomplicated disease caused microagglutination. The ability of infected RBC to bind to melanoma cells grown in vitro did not differ between patients with cerebral or uncomplicated malaria. The results of this study, taken in conjunction with our previous findings, establish a strong association between rosette formation in P. falciparum-infected RBC and cerebral malaria.

Author Notes

Copyright:
Copyright © 1992 by The American Society of Tropical Medicine and Hygiene 1992
Published Online:
May 1992
Cover The American Journal of Tropical Medicine and Hygiene
The American Journal of Tropical Medicine and Hygiene
Print ISSN:
0002-9637
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