Search results for "Virus host"
showing 3 items of 3 documents
Virus-host interactome: Putting the accent on how it changes
2017
[EN] Viral infections are extremely complex processes that could only be well understood by precisely characterizing the interaction networks between the virus and the host components. In recent years, much effort has gone in this directionwith the aimof unveiling themolecular basis of viral pathology. These networks are mostly formed by viral and host proteins, and are expected to be dynamic bothwith time and space (i.e., with the progression of infection, as well as with the virus and host genotypes; what we call plastodynamic). This largely overlooked spatio-temporal evolution urgently calls for a change both in the conceptual paradigms and experimental techniques used so far to characte…
Virus-Host Coevolution as a Tool for Controlling Bacterial Resistance to Phage Therapy
2019
Bacterial resistance to antibiotics is a global public health concern. New treatments are needed to combat resistant strains, among which phage therapy is a promising option. Probably the main advantages of phage therapy are its high specificity as well as rapid viral adaptability, which in principle allows using phage evolution to overcome resistance. Here, we have performed serial coevolution passages between Escherichia coli and its phage T7 to investigate the ability of coevolved phages to reduce the emergence of resistances. We find that the initial bacterial population is less likely to undergo resistance when challenged with experimentally coevolved phages than when challenged with t…
Spatially-induced nestedness in a neutral model of phage-bacteria networks
2017
[EN] Ecological networks, both displaying mutualistic or antagonistic interactions, seem to share common structural traits: the presence of nestedness and modularity. A variety of model approaches and hypothesis have been formulated concerning the significance and implications of these properties. In phage-bacteria bipartite infection networks, nestedness seems to be the rule in many different contexts. Modeling the coevolution of a diverse virus¿host ensemble is a difficult task, given the dimensionality and multi parametric nature of a standard continuous approximation. Here, we take a different approach, by using a neutral, toy model of host¿phage interactions on a spatial lattice. Each …