Strain-specific innate immune signaling pathways determine malaria parasitemia dynamics and host mortality

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	Strain-specific innate immune signaling pathways determine malaria parasitemia dynamics and host mortality
	Wu, Jian ; Tian, Linjie ; Yu, Xiao ; Pattaradilokrat, Sittiporn ; Li, Jian ; Wang, Mingjun ; Yu, Weishi ; Qi, Yanwei ; Zeituni, Amir E. ; Nair, Sethu C. ; Crampton, Steve P. ; Orandle, Marlene S. ; Bolland, Silvia M. ; Qi, Chen-Feng ; Long, Carole A. ; Myers, Timothy G. ; Coligan, John E. ; Wang, Rongfu ; Su, Xin-zhuan ; Li J(李剑)
刊名	http://dx.doi.org/10.1073/pnas.1316467111
	2014-01-28
关键词	EXPERIMENTAL CEREBRAL MALARIA FALCIPARUM-PARASITIZED ERYTHROCYTES PATTERN-RECOGNITION RECEPTORS PERSISTENT LCMV INFECTION CYCLIC GMP-AMP PLASMODIUM-FALCIPARUM CYTOSOLIC DNA BLOOD-STAGE DENDRITIC CELLS I INTERFERONS
英文摘要	Intramural Research Program of the Division of Intramural Research at the NIAID; National Institutes of Health (NIH); National Cancer Institute; NIH [R01CA090327, R01CA101795]; China Scholarship Council (CSC); Malaria infection triggers vigorous host immune responses; however, the parasite ligands, host receptors, and the signaling pathways responsible for these reactions remain unknown or controversial. Malaria parasites primarily reside within RBCs, thereby hiding themselves from direct contact and recognition by host immune cells. Host responses to malaria infection are very different from those elicited by bacterial and viral infections and the host receptors recognizing parasite ligands have been elusive. Here we investigated mouse genome-wide transcriptional responses to infections with two strains of Plasmodium yoelii (N67 and N67C) and discovered differences in innate response pathways corresponding to strain-specific disease phenotypes. Using in vitro RNAi-based gene knockdown and KO mice, we demonstrated that a strong type I IFN (IFN-I) response triggered by RNA polymerase III and melanoma differentiation-associated protein 5, not Toll-like receptors (TLRs), binding of parasite DNA/RNA contributed to a decline of parasitemia in N67-infected mice. We showed that conventional dendritic cells were the major sources of early IFN-I, and that surface expression of phosphatidylserine on infected RBCs might promote their phagocytic uptake, leading to the release of parasite ligands and the IFN-I response in N67 infection. In contrast, an elevated inflammatory response mediated by CD14/TLR and p38 signaling played a role in disease severity and early host death in N67C-infected mice. In addition to identifying cytosolic DNA/RNA sensors and signaling pathways previously unrecognized in malaria infection, our study demonstrates the importance of parasite genetic backgrounds in malaria pathology and provides important information for studying human malaria pathogenesis.
语种	英语
出版者	NATL ACAD SCIENCES
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/90841]
专题	生命科学－已发表论文
推荐引用方式 GB/T 7714	Wu, Jian,Tian, Linjie,Yu, Xiao,et al. Strain-specific innate immune signaling pathways determine malaria parasitemia dynamics and host mortality[J]. http://dx.doi.org/10.1073/pnas.1316467111,2014.
APA	Wu, Jian.,Tian, Linjie.,Yu, Xiao.,Pattaradilokrat, Sittiporn.,Li, Jian.,...&李剑.(2014).Strain-specific innate immune signaling pathways determine malaria parasitemia dynamics and host mortality.http://dx.doi.org/10.1073/pnas.1316467111.
MLA	Wu, Jian,et al."Strain-specific innate immune signaling pathways determine malaria parasitemia dynamics and host mortality".http://dx.doi.org/10.1073/pnas.1316467111 (2014).