Strain-dependent host transcriptional responses to Toxoplasma infection are largely conserved in mammalian and avian hosts.
Strain-dependent host transcriptional responses to Toxoplasma infection are largely conserved in mammalian and avian hosts.
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DOI：
10.1371/journal.pone.0026369
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发表时间：
2011
期刊：
影响因子：
3.7
通讯作者：
Boothroyd JC
中科院分区：
文献类型：
--
作者：
Ong YC;Boyle JP;Boothroyd JC
Toxoplasma gondii has a remarkable ability to infect an enormous variety of mammalian and avian species. Given this, it is surprising that three strains (Types I/II/III) account for the majority of isolates from Europe/North America. The selective pressures that have driven the emergence of these particular strains, however, remain enigmatic. We hypothesized that strain selection might be partially driven by adaptation of strains for mammalian versus avian hosts. To test this, we examine in vitro, strain-dependent host responses in fibroblasts of a representative avian host, the chicken (Gallus gallus). Using gene expression profiling of infected chicken embryonic fibroblasts and pathway analysis to assess host response, we show here that chicken cells respond with distinct transcriptional profiles upon infection with Type II versus III strains that are reminiscent of profiles observed in mammalian cells. To identify the parasite drivers of these differences, chicken fibroblasts were infected with individual F1 progeny of a Type II x III cross and host gene expression was assessed for each by microarray. QTL mapping of transcriptional differences suggested, and deletion strains confirmed, that, as in mammalian cells, the polymorphic rhoptry kinase ROP16 is the major driver of strain-specific responses. We originally hypothesized that comparing avian versus mammalian host response might reveal an inversion in parasite strain-dependent phenotypes; specifically, for polymorphic effectors like ROP16, we hypothesized that the allele with most activity in mammalian cells might be less active in avian cells. Instead, we found that activity of ROP16 alleles appears to be conserved across host species; moreover, additional parasite loci that were previously mapped for strain-specific effects on mammalian response showed similar strain-specific effects in chicken cells. These results indicate that if different hosts select for different parasite genotypes, the selection operates downstream of the signaling occurring during the beginning of the host's immune response.
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影响因子：
3.4
作者：
Khaminets A;Hunn JP;Könen-Waisman S;Zhao YO;Preukschat D;Coers J;Boyle JP;Ong YC;Boothroyd JC;Reichmann G;Howard JC
通讯作者：
Howard JC
影响因子：
2.6
作者：
Dubey, J. P.;Webb, D. M.;Su, C.
通讯作者：
Su, C.
影响因子：
30.3
作者：
Jensen KD;Wang Y;Wojno ED;Shastri AJ;Hu K;Cornel L;Boedec E;Ong YC;Chien YH;Hunter CA;Boothroyd JC;Saeij JP
通讯作者：
Saeij JP
影响因子：
4.8
作者：
Blader, IJ;Manger, ID;Boothroyd, JC
通讯作者：
Boothroyd, JC
影响因子：
14.9
作者：
Gajria, Bindu;Bahl, Amit;Brestelli, John;Dommer, Jennifer;Fischer, Steve;Gao, Xin;Heiges, Mark;Iodice, John;Kissinger, Jessica C.;Mackey, Aaron J.;Pinney, Deborah F.;Roos, David S.;Stoeckert, Christian J., Jr.;Wang, Haiming;Brunk, Brian P.
通讯作者：
Brunk, Brian P.