TY - JOUR
T1 - A new implication of quasispecies dynamics
T2 - Broad virus diversification in absence of external perturbations
AU - Domingo, Esteban
AU - Soria, María Eugenia
AU - Gallego, Isabel
AU - de Ávila, Ana Isabel
AU - García-Crespo, Carlos
AU - Martínez-González, Brenda
AU - Gómez, Jordi
AU - Briones, Carlos
AU - Gregori, Josep
AU - Quer, Josep
AU - Perales, Celia
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/8
Y1 - 2020/8
N2 - RNA genetic elements include many important animal and plant pathogens. They share high mutability, a trait that has multiple implications for the interactions with their host organisms. Here we review evidence of a new adaptive feature of RNA viruses that we term “broadly diversifying selection”. It constitutes a new type of positive selection without participation of any external selective agent, and which is built upon a progressive increase of the number of different genomes that dominate the population. The evidence was provided by analyses of mutant spectrum composition of two important viral pathogens, foot-and-mouth disease virus (FMDV) and hepatitis C virus (HCV) after prolonged replication in their respective cell culture environment. Despite being fueled by mutations that arise randomly and in absence of an external guiding selective force, this type of selection prepares the viral population for a response to selective forces still to occur. Since current evidence suggests that broadly diversifying selection is favored by elevated mutation rates and population sizes, it may constitute a more general behavior, relevant also to the adaptive dynamics of microbial populations and cancer cells.
AB - RNA genetic elements include many important animal and plant pathogens. They share high mutability, a trait that has multiple implications for the interactions with their host organisms. Here we review evidence of a new adaptive feature of RNA viruses that we term “broadly diversifying selection”. It constitutes a new type of positive selection without participation of any external selective agent, and which is built upon a progressive increase of the number of different genomes that dominate the population. The evidence was provided by analyses of mutant spectrum composition of two important viral pathogens, foot-and-mouth disease virus (FMDV) and hepatitis C virus (HCV) after prolonged replication in their respective cell culture environment. Despite being fueled by mutations that arise randomly and in absence of an external guiding selective force, this type of selection prepares the viral population for a response to selective forces still to occur. Since current evidence suggests that broadly diversifying selection is favored by elevated mutation rates and population sizes, it may constitute a more general behavior, relevant also to the adaptive dynamics of microbial populations and cancer cells.
KW - Adaptive strategies
KW - Foot-and-mouth disease virus
KW - Hepatitis C virus
KW - Mutational waves
KW - RNA viruses
KW - Selective forces
UR - http://www.scopus.com/inward/record.url?scp=85081675270&partnerID=8YFLogxK
U2 - 10.1016/j.meegid.2020.104278
DO - 10.1016/j.meegid.2020.104278
M3 - Review article
C2 - 32165244
AN - SCOPUS:85081675270
SN - 1567-1348
VL - 82
JO - Infection, Genetics and Evolution
JF - Infection, Genetics and Evolution
M1 - 104278
ER -