Chikungunya virus emergence is constrained in Asia by lineage-specific adaptive landscapes

Konstantin A. Tsetsarkin, Rubing Chen, Grace Leal, Naomi Forrester, Stephen Higgs, Jing Huang, Scott Weaver

Research output: Contribution to journalArticle

129 Citations (Scopus)

Abstract

Adaptation of RNA viruses to a new host or vector species often results in emergence of new viral lineages. However, lineage-specific restrictions on the adaptive processes remain largely unexplored. Recently, a Chikungunya virus (CHIKV) lineage of African origin emerged to cause major epidemics of severe, persistent, debilitating arthralgia in Africa and Asia. Surprisingly, this new lineage is actively replacing endemic strains in Southeast Asia that have been circulating there for 60 y. This replacement process is associated with adaptation of the invasive CHIKV strains to an atypical vector, the Aedes albopictus mosquito that is ubiquitously distributed in the region. Herewedemonstrate that lineage-specific epistatic interactions between substitutions at amino acid positions 226 and 98 of the E1 envelope glycoprotein, the latter of which likely resulted from a founder effect, have for 60 y restricted the ability of endemic Asian CHIKV strains to adapt to this new vector. This adaptive constraint appears to be allowing invasion of the unoccupied vector niche by Ae. albopictus-adapted African strains. These results underscore how different adaptive landscapes occupied by closely related viral genotypes can profoundly affect the outcome of viral evolution and disease emergence.

Original languageEnglish (US)
Pages (from-to)7872-7877
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume108
Issue number19
DOIs
StatePublished - May 10 2011

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Chikungunya virus
Founder Effect
Southeastern Asia
Aptitude
Aedes
RNA Viruses
Arthralgia
Virus Diseases
Amino Acid Substitution
Culicidae
Glycoproteins
Genotype

ASJC Scopus subject areas

  • General

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Chikungunya virus emergence is constrained in Asia by lineage-specific adaptive landscapes. / Tsetsarkin, Konstantin A.; Chen, Rubing; Leal, Grace; Forrester, Naomi; Higgs, Stephen; Huang, Jing; Weaver, Scott.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 108, No. 19, 10.05.2011, p. 7872-7877.

Research output: Contribution to journalArticle

Tsetsarkin, Konstantin A. ; Chen, Rubing ; Leal, Grace ; Forrester, Naomi ; Higgs, Stephen ; Huang, Jing ; Weaver, Scott. / Chikungunya virus emergence is constrained in Asia by lineage-specific adaptive landscapes. In: Proceedings of the National Academy of Sciences of the United States of America. 2011 ; Vol. 108, No. 19. pp. 7872-7877.
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