PMID- 27784899 OWN - NLM STAT- MEDLINE DCOM- 20180430 LR - 20181113 IS - 2045-2322 (Electronic) IS - 2045-2322 (Linking) VI - 6 DP - 2016 Oct 27 TI - Plasma Ang2 and ADAM17 levels are elevated during clinical malaria; Ang2 level correlates with severity and expression of EPCR-binding PfEMP1. PG - 35950 LID - 10.1038/srep35950 [doi] LID - 35950 AB - The pathogenesis of Plasmodium falciparum malaria involves a complex interplay between parasite adhesion and inflammatory response that includes release of cytokines and activation of the endothelium with accompanying release of Angiopoitin 2 (Ang2) to the plasma. A-disintegrin and metalloproteinase 17 (ADAM17) is a protein responsible for releasing cytokines, including Tumor Necrosis Factor alpha (TNFalpha), and shedding of adhesion proteins. In this study, we show that plasma levels of ADAM17 are increased in Tanzanian children hospitalized with a malaria infection compared with asymptomatic children but similar to children hospitalized with other infectious diseases. The plasma levels of ADAM17 decreased during recovery after an acute malaria episode. Plasma levels of Ang2 were associated with markers of malaria severity and levels of var transcripts encoding P. falciparum Erythrocyte Membrane Protein 1 (PfEMP1) containing Cysteine Rich Inter Domain Region alpha1 (CIDRalpha1) domains predicted to bind Endothelial Protein C receptor (EPCR). ADAM17 levels were not associated with expression of var genes encoding different PfEMP1 types when controlling for age. These data are the first to report ADAM17 plasma levels in malaria-exposed individuals, and support the notion that parasite sequestration mediated by EPCR-binding PfEMP1 is associated with endothelial activation and pathology in severe paediatric malaria. FAU - Petersen, Jens E V AU - Petersen JE AD - Centre for Medical Parasitology, Department of Immunology &Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Diseases, Rigshospitalet, Copenhagen, Denmark. FAU - Mkumbaye, Sixbert I AU - Mkumbaye SI AD - Kilimanjaro Christian Medical University College and Kilimanjaro Clinical Research Institute, Moshi, Tanzania. FAU - Vaaben, Anna V AU - Vaaben AV AD - Centre for Medical Parasitology, Department of Immunology &Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Diseases, Rigshospitalet, Copenhagen, Denmark. FAU - Manjurano, Alphaxard AU - Manjurano A AD - National Institute for Medical Research, Mwanza Research Centre, Mwanza, Tanzania. FAU - Lyimo, Eric AU - Lyimo E AD - National Institute for Medical Research, Mwanza Research Centre, Mwanza, Tanzania. FAU - Kavishe, Reginald A AU - Kavishe RA AD - Kilimanjaro Christian Medical University College and Kilimanjaro Clinical Research Institute, Moshi, Tanzania. FAU - Mwakalinga, Steven B AU - Mwakalinga SB AD - Kilimanjaro Christian Medical University College and Kilimanjaro Clinical Research Institute, Moshi, Tanzania. FAU - Mosha, Jacklin AU - Mosha J AD - National Institute for Medical Research, Mwanza Research Centre, Mwanza, Tanzania. FAU - Minja, Daniel T R AU - Minja DT AD - National Institute for Medical Research, Tanga Centre, Tanga, Tanzania. FAU - Lusingu, John P A AU - Lusingu JP AD - National Institute for Medical Research, Tanga Centre, Tanga, Tanzania. FAU - Theander, Thor G AU - Theander TG AD - Centre for Medical Parasitology, Department of Immunology &Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Diseases, Rigshospitalet, Copenhagen, Denmark. FAU - Lavstsen, Thomas AU - Lavstsen T AD - Centre for Medical Parasitology, Department of Immunology &Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Diseases, Rigshospitalet, Copenhagen, Denmark. FAU - Wang, Christian W AU - Wang CW AD - Centre for Medical Parasitology, Department of Immunology &Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Diseases, Rigshospitalet, Copenhagen, Denmark. LA - eng GR - R01 HL130678/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20161027 PL - England TA - Sci Rep JT - Scientific reports JID - 101563288 RN - 0 (ANGPT2 protein, human) RN - 0 (Angiopoietin-2) RN - 0 (Endothelial Protein C Receptor) RN - 0 (PROCR protein, human) RN - 0 (Protozoan Proteins) RN - 0 (erythrocyte membrane protein 1, Plasmodium falciparum) RN - EC 3.4.24.86 (ADAM17 Protein) RN - EC 3.4.24.86 (ADAM17 protein, human) SB - IM MH - ADAM17 Protein/*blood MH - Adolescent MH - Angiopoietin-2/*blood MH - Child MH - Child, Preschool MH - Endothelial Protein C Receptor/*blood MH - Female MH - Gene Expression MH - Genes, Protozoan MH - Humans MH - Infant MH - Malaria, Falciparum/*blood/genetics/*parasitology MH - Male MH - Plasmodium falciparum/genetics MH - Protozoan Proteins/*blood/*genetics MH - Tanzania PMC - PMC5082358 EDAT- 2016/10/28 06:00 MHDA- 2018/05/01 06:00 PMCR- 2016/10/27 CRDT- 2016/10/28 06:00 PHST- 2016/07/12 00:00 [received] PHST- 2016/10/07 00:00 [accepted] PHST- 2016/10/28 06:00 [pubmed] PHST- 2018/05/01 06:00 [medline] PHST- 2016/10/28 06:00 [entrez] PHST- 2016/10/27 00:00 [pmc-release] AID - srep35950 [pii] AID - 10.1038/srep35950 [doi] PST - epublish SO - Sci Rep. 2016 Oct 27;6:35950. doi: 10.1038/srep35950.