Longevity of genotype-specific immune responses to Plasmodium falciparum merozoite surface protein 1 in Kenyan children from regions of different malaria transmission intensity

Natalie M. Bowman, Jonathan J. Juliano, Cynthia J. Snider, Oksana Kharabora, Steven R. Meshnick, John Vulule, Chandy John, Ann M. Moormann

Research output: Contribution to journalArticle

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Abstract

Naturally acquired immunity to Plasmodium falciparum presents a changing landscape as malaria control programs and vaccine initiatives are implemented. Determining which immunologic indicators remain surrogates of past infection, as opposed to mediators of protection, led us to compare stability of immune responses across regions with divergent malaria transmission intensities. A repeat cross-sectional study of Kenyan children from a malariaholoendemic area and an epidemic-prone area was used to examine longitudinal antibody and interferon-gamma (IFN-γ) responses to the 3D7 and FVO variants of merozoite surface protein 1 (MSP1). Antibodies to MSP1 were common in both study populations and did not significantly wane over a 21-month time period. IFN-γ responses were less frequent and rapidly disappeared in children after a prolonged period of no malaria transmission. Antibody and IFN-γ responses rarely correlated with each other; however, MSP1-specific IFN-γ response correlated with lack of concurrent P. falciparum parasitemia of the same genotype, though only statistically significantly in the malaria-holoendemic region (odds ratio = 0.31, 95% confidence interval = 0.12-0.84). This study affirms that antimalarial antibodies are informative for evaluation of history of malaria exposure within individuals, whereas cell-mediated immunity, though short lived under natural exposure conditions, might provide an assessment of recent infection and protection from parasitemia.

Original languageEnglish (US)
Pages (from-to)580-587
Number of pages8
JournalAmerican Journal of Tropical Medicine and Hygiene
Volume95
Issue number3
DOIs
StatePublished - Sep 1 2016

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Merozoite Surface Protein 1
Plasmodium falciparum
Malaria
Genotype
Interferon-gamma
Parasitemia
Antibodies
Antimalarials
Adaptive Immunity
Infection
Cellular Immunity
Vaccines
Cross-Sectional Studies
Odds Ratio
Confidence Intervals
Population

ASJC Scopus subject areas

  • Parasitology
  • Medicine(all)
  • Virology
  • Infectious Diseases

Cite this

Longevity of genotype-specific immune responses to Plasmodium falciparum merozoite surface protein 1 in Kenyan children from regions of different malaria transmission intensity. / Bowman, Natalie M.; Juliano, Jonathan J.; Snider, Cynthia J.; Kharabora, Oksana; Meshnick, Steven R.; Vulule, John; John, Chandy; Moormann, Ann M.

In: American Journal of Tropical Medicine and Hygiene, Vol. 95, No. 3, 01.09.2016, p. 580-587.

Research output: Contribution to journalArticle

Bowman, Natalie M. ; Juliano, Jonathan J. ; Snider, Cynthia J. ; Kharabora, Oksana ; Meshnick, Steven R. ; Vulule, John ; John, Chandy ; Moormann, Ann M. / Longevity of genotype-specific immune responses to Plasmodium falciparum merozoite surface protein 1 in Kenyan children from regions of different malaria transmission intensity. In: American Journal of Tropical Medicine and Hygiene. 2016 ; Vol. 95, No. 3. pp. 580-587.
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