Networks of genetic similarity reveal non-neutral processes shape strain structure in Plasmodium falciparum.
Networks of genetic similarity reveal non-neutral processes shape strain structure in Plasmodium falciparum.
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DOI:
10.1038/s41467-018-04219-3
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发表时间:
2018-05-08
影响因子:
16.6
通讯作者:
Pascual M
中科院分区:
文献类型:
--
作者:
He Q;Pilosof S;Tiedje KE;Ruybal-Pesántez S;Artzy-Randrup Y;Baskerville EB;Day KP;Pascual M
Pathogens compete for hosts through patterns of cross-protection conferred by immune responses to antigens. In Plasmodium falciparum malaria, the var multigene family encoding for the major blood-stage antigen PfEMP1 has evolved enormous genetic diversity through ectopic recombination and mutation. With 50–60 var genes per genome, it is unclear whether immune selection can act as a dominant force in structuring var repertoires of local populations. The combinatorial complexity of the var system remains beyond the reach of existing strain theory and previous evidence for non-random structure cannot demonstrate immune selection without comparison with neutral models. We develop two neutral models that encompass malaria epidemiology but exclude competitive interactions between parasites. These models, combined with networks of genetic similarity, reveal non-neutral strain structure in both simulated systems and an extensively sampled population in Ghana. The unique population structure we identify underlies the large transmission reservoir characteristic of highly endemic regions in Africa. Plasmodium has evolved high genetic diversity in var genes, which encode for the major blood-stage antigen. Here, He et al. show how immune selection shapes the var gene repertoire in both simulated systems and a population in Ghana, by using neutral models and genetic similarity networks.
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影响因子:
82.9
作者:
通讯作者:
--
DOI:
10.1038/nrmicro2145
发表时间:
2009-07
期刊:
Nature reviews. Microbiology
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1098/rspb.2016.0102
发表时间:
2016-04-27
影响因子:
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作者:
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通讯作者:
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影响因子:
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通讯作者:
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影响因子:
6.7
作者:
Barry AE;Leliwa-Sytek A;Tavul L;Imrie H;Migot-Nabias F;Brown SM;McVean GA;Day KP
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Day KP