scholarly journals Severe Malarial Anemia is Associated With Long-term Neurocognitive Impairment

2014 ◽  
Vol 59 (3) ◽  
pp. 336-344 ◽  
Author(s):  
Paul Bangirana ◽  
Robert O. Opoka ◽  
Michael J. Boivin ◽  
Richard Idro ◽  
James S. Hodges ◽  
...  
2021 ◽  
Vol 4 (12) ◽  
pp. e2138515
Author(s):  
Dibyadyuti Datta ◽  
Paul Bangirana ◽  
Robert O. Opoka ◽  
Andrea L. Conroy ◽  
Katrina Co ◽  
...  

2009 ◽  
Vol 77 (9) ◽  
pp. 3864-3871 ◽  
Author(s):  
Christopher C. Keller ◽  
Collins Ouma ◽  
Yamo Ouma ◽  
Gordon A. Awandare ◽  
Gregory C. Davenport ◽  
...  

ABSTRACT In areas of holoendemic Plasmodium falciparum transmission, severe malarial anemia (SMA) is a leading cause of pediatric morbidity and mortality. Although many soluble mediators regulate erythropoiesis, it is unclear how these factors contribute to development of SMA. Investigation of novel genes dysregulated in response to malarial pigment (hemozoin [PfHz]) revealed that stem cell growth factor (SCGF; also called C-type lectin domain family member 11A [CLEC11A]), a hematopoietic growth factor important for development of erythroid and myeloid progenitors, was one of the most differentially expressed genes. Additional experiments with cultured peripheral blood mononuclear cells (PBMCs) demonstrated that PfHz decreased SCGF/CLEC11A transcriptional expression in a time-dependent manner. Circulating SCGF levels were then determined for Kenyan children (n = 90; aged 3 to 36 months) presenting at a rural hospital with various severities of malarial anemia. SCGF levels in circulation (P = 0.001) and in cultured PBMCs (P = 0.004) were suppressed in children with SMA. Circulating SCGF also correlated positively with hemoglobin levels (r = 0.241; P = 0.022) and the reticulocyte production index (RPI) (r = 0.280; P = 0.029). In addition, SCGF was decreased in children with reduced erythropoiesis (RPI of <2) (P < 0.001) and in children with elevated levels of naturally acquired monocytic PfHz (P = 0.019). Thus, phagocytosis of PfHz promotes a decrease in SCGF gene products, which may contribute to reduced erythropoiesis in children with SMA.


2017 ◽  
Vol 65 (1) ◽  
pp. e26745 ◽  
Author(s):  
Robert O. Opoka ◽  
Paul Bangirana ◽  
Richard Idro ◽  
Estela Shabani ◽  
Ruth Namazzi ◽  
...  

Author(s):  
E. B. Brickley ◽  
E. Kabyemela ◽  
J. D. Kurtis ◽  
M. Fried ◽  
A. M. Wood ◽  
...  

AbstractAs a pilot study to investigate whether personalized medicine approaches could have value for the reduction of malaria-related mortality in young children, we evaluated questionnaire and biomarker data collected from the Mother Offspring Malaria Study Project birth cohort (Muheza, Tanzania, 2002–2006) at the time of delivery as potential prognostic markers for pediatric severe malarial anemia. Severe malarial anemia, defined here as aPlasmodium falciparuminfection accompanied by hemoglobin levels below 50 g/L, is a key manifestation of life-threatening malaria in high transmission regions. For this study sample, a prediction model incorporating cord blood levels of interleukin-1β provided the strongest discrimination of severe malarial anemia risk with a C-index of 0.77 (95% CI 0.70–0.84), whereas a pragmatic model based on sex, gravidity, transmission season at delivery, and bed net possession yielded a more modest C-index of 0.63 (95% CI 0.54–0.71). Although additional studies, ideally incorporating larger sample sizes and higher event per predictor ratios, are needed to externally validate these prediction models, the findings provide proof of concept that risk score-based screening programs could be developed to avert severe malaria cases in early childhood.


Blood ◽  
2013 ◽  
Vol 121 (15) ◽  
pp. 3016-3022 ◽  
Author(s):  
Florence Burté ◽  
Biobele J. Brown ◽  
Adebola E. Orimadegun ◽  
Wasiu A. Ajetunmobi ◽  
Nathaniel K. Afolabi ◽  
...  

Key Points Hepcidin rises more dramatically in mild malaria than in severe malaria. Hepcidin levels are linked to inflammation, not anemia, in severe malarial anemia and cerebral malaria.


Sign in / Sign up

Export Citation Format

Share Document