Prolonged macrophage activation and persistent anaemia in children with complicated malaria

G. Biemba, V. R. Gordeuk, P. E. Thuma, G. F. Mabeza, G. Weiss

Research output: Contribution to journalArticle

Abstract

OBJECTIVE: To determine if prolonged immune activation may be associated with the persistence of anaemia after treatment for severe malaria, we measured serum concentrations of neopterin and interleukin-4 during one week of antimalarial therapy and determined haemoglobin levels one month later. Neopterin is a clinically valuable marker for monitoring activation of macrophages by gamma-interferon and thus reflects the TH-1 immune response. Interleukin-4 is a major cytokine that tends to be inhibited by TH-1 activity. METHOD: The study population consisted of 26 Zambian children <6 years of age who presented with cerebral malaria to a rural hospital in 1994 and who were treated with quinine for seven days. Six children (23%) were anaemic (haemoglobin < 11 g/dl) one month after completing antimalarial therapy. RESULTS: On admission, concentrations of neopterin were markedly elevated in all patients. During the seven days of anti-malarial therapy, neopterin levels remained elevated in the 6 children who proved to have persistent anaemia one month after finishing treatment but declined significantly (P = 0.008) in the 2.0 children who corrected their haemoglobin levels by that time. Conversely, interleukin-4 levels declined in the children with persistent anaemia (P = 0.043) but not in the other children. CONCLUSION: Persistence of the TH-1 mediated immune response and associated activation of macrophages may be involved in the pathogenesis of lingering anaemia after treatment of malaria.

Original languageEnglish (US)
Pages (from-to)60-65
Number of pages6
JournalTropical Medicine and International Health
Volume3
Issue number1
DOIs
StatePublished - Mar 3 1998
Externally publishedYes

Keywords

  • Anaemia
  • Interleukin-4
  • Malaria
  • Neopterin
  • Zambia

ASJC Scopus subject areas

  • Parasitology
  • Public Health, Environmental and Occupational Health
  • Infectious Diseases

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