RESUMEN
Chikungunya virus (CHIKV) is a mosquito-borne alphavirus that causes acute, subacute, and chronic human arthritogenic diseases and, in rare instances, can lead to neurological complications and death. Here, we combined epidemiological, virological, histopathological, cytokine, molecular dynamics, metabolomic, proteomic, and genomic analyses to investigate viral and host factors that contribute to chikungunya-associated (CHIK) death. Our results indicate that CHIK deaths are associated with multi-organ infection, central nervous system damage, and elevated serum levels of pro-inflammatory cytokines and chemokines compared with survivors. The histopathologic, metabolite, and proteomic signatures of CHIK deaths reveal hemodynamic disorders and dysregulated immune responses. The CHIKV East-Central-South-African lineage infecting our study population causes both fatal and survival cases. Additionally, CHIKV infection impairs the integrity of the blood-brain barrier, as evidenced by an increase in permeability and altered tight junction protein expression. Overall, our findings improve the understanding of CHIK pathophysiology and the causes of fatal infections.
Asunto(s)
Fiebre Chikungunya , Virus Chikungunya , Animales , Humanos , Fiebre Chikungunya/complicaciones , Proteómica , Virus Chikungunya/genética , Citocinas/metabolismoRESUMEN
In January 2017, a yellow fever outbreak occurred in Espirito Santo, Brazil, where human immunization coverage is low. Histologic, immunohistologic, and PCR examinations were performed for 22 deceased nonhuman New World primates; typical yellow fever features were found in 21. Diagnosis in nonhuman primates prompted early public health response.
Em janeiro de 2017, ocorreu um surto de febre amarela no Espírito Santo, Brasil, onde a cobertura de imunização humana é baixa. Os exames histológico, imuno-histológico e PCR foram realizados para 22 primatas não humanos do Novo Mundo falecidos; características típicas da febre amarela foram encontradas em 21. O diagnóstico em primatas não humanos levou a uma resposta precoce da saúde pública.