Malaria exacerbates inflammation-associated elevation in ferritin and soluble transferrin receptor with only modest effects on iron deficiency and iron deficiency anaemia among rural Zambian children

被引:11
|
作者
Barffour, Maxwell A. [1 ]
Schulze, Kerry J. [1 ]
Coles, Christian L. [1 ]
Chileshe, Justin [2 ]
Kalungwana, Ng'andwe [2 ]
Siamusantu, Ward [3 ]
Arguello, Margia [1 ]
Moss, William J. [1 ]
West, Keith P., Jr. [1 ]
Palmer, Amanda C. [1 ]
机构
[1] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Baltimore, MD USA
[2] Trop Dis Res Ctr, Ndola, Zambia
[3] Natl Food & Nutr Commiss, Lusaka, Zambia
关键词
malaria; inflammation; ferritin; soluble transferrin receptor; anaemia; iron deficiency; paludisme; ferritine; recepteur soluble de la transferrine; anemie; carence en fer; PLASMODIUM-FALCIPARUM MALARIA; NECROSIS-FACTOR-ALPHA; PLASMA FERRITIN; PRESCHOOL-CHILDREN; INFECTION; SERUM; HOMEOSTASIS; BIOMARKERS; CYTOKINES; TRIAL;
D O I
10.1111/tmi.13004
中图分类号
R1 [预防医学、卫生学];
学科分类号
1004 ; 120402 ;
摘要
ObjectiveIn 4- to 8-year-old Zambian children (n = 744), we evaluated the effects of adjusting for inflammation (1-acid glycoprotein >1 g/l), with or without additional adjustment for malaria, on prevalence estimates of iron deficiency (ID) and iron deficiency anaemia (IDA) during low malaria (LowM) and high malaria (HighM) transmission seasons. MethodsTo estimate adjustment factors, children were classified as: (i) reference (malaria negative without inflammation), (ii) inflammation without malaria (I), (iii) malaria without inflammation (M) and (iv) inflammation with malaria (IM). We estimated the unadjusted ID or IDA prevalence, and then adjusted for inflammation alone (IDI or IDA(I)) or inflammation and malaria (IDIM or IDA(IM)). ResultsMean ferritin was 38 (reference), 45 (I), 43 (M) and 54 g/l (IM) in LowM, increasing to 44, 56, 96 and 167 g/l, respectively, in HighM. Corresponding mean sTfR was 6.4, 6.9, 7.9 and 8.4 mg/l in LowM, increasing to 8.2, 9.2. 8.7 and 9.7 mg/l in HighM. Ferritin-based ID, IDI and IDIM were 7.8%, 8.7% or 9.1%, respectively, in LowM and 4.6%, 10.0% or 11.7%, respectively, in HighM. Corresponding soluble transferrin receptor (sTfR)-based estimates were 27.0%, 24.1% and 19.1%, respectively, in LowM, increasing to 53.6%, 46.5% and 45.3%, respectively, in HighM. Additional adjustment for malaria resulted in a 1- to 2-percentage point change in IDA, depending on biomarker and season. ConclusionsIn this population, malaria substantially increased ferritin and sTfR concentrations, with modest effects on ID and IDA prevalence estimates. ObjectifChez les enfants zambiens de 4 a 8 ans (n = 744), nous avons evalue les effets de l'ajustement pour l'inflammation (1-glycoproteine acide > 1 g/L), avec ou sans ajustement additionnel pour le paludisme, sur les estimations de prevalence de la carence en fer (CF) et l'anemie ferriprive (AF) lors des saisons de transmission faible (LowM) et elevee (HighM) du paludisme. MethodesPour estimer les facteurs d'ajustement, les enfants ont ete classes en: a) reference (paludisme negatif sans inflammation), b) inflammation sans paludisme (I), c) paludisme sans inflammation (M), et d) inflammation avec paludisme (IM). Nous avons estime la prevalence non ajustee de la CF ou de l'AF, puis avons ajuste pour l'inflammation seule (CFI ou AF(I)) ou l'inflammation avec le paludisme (CFIM ou AF(IM)). ResultatsLa ferritine moyenne etait de 38 (reference), 45 (I), 43 (M) et 54 (IM) g/L dans la LowM, augmentant a 44, 56, 96 et 167 g/L respectivement, dans la HighM. Les valeurs moyennes correspondantes du recepteur soluble de la transferrine (sTfR) etaient de 6,4; 6,9; 7,9 et 8,4 mg/L dans la LowM, augmentant a 8,2; 9,2; 8,7 et 9,7 mg/L dans la HighM. Les CF sur base de la ferritine, de CFI et CFIM etaient respectivement de 7,8%, 8,7% et 9,1% dans la LowM et de 4,6%, 10,0% et 11,7% respectivement, dans la HighM. Les estimations correspondantes du sTfR etaient respectivement de 27,0%, 24,1% et 19,1% dans la LowM, augmentant a 53,6%, 46,5% et 45,3%, respectivement, dans la HighM. Des ajustements supplementaires pour le paludisme ont entraine une variation d'environ 1 a 2 points de pourcentage de l'AF selon le biomarqueur et la saison. ConclusionsDans cette population, le paludisme a considerablement augmente les concentrations de ferritine et du sTfR, avec des effets modestes sur les estimations de prevalence la CF et de l'AF.
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页码:53 / 62
页数:10
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