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https://www.arca.fiocruz.br/handle/icict/19508
HYDROCEPHALUS AND ARTHROGRYPOSIS IN AN IMMUNOCOMPETENT MOUSE MODEL OF ZIKA TERATOGENY: A DEVELOPMENTAL STUDY
Author
Xavier-Neto, Jose
Carvalho, Murilo
Pascoalino, Bruno Dos Santos
Cardoso, Alisson Campos
Costa, Ângela Maria Sousa
Pereira, Ana Helena Macedo
Santos, Luana Nunes
Saito, Ângela
Marques, Rafael Elias
Smetana, Juliana Helena Costa
Consonni, Silvio Roberto
Bandeira, Carla
Costa, Vivian Vasconcelos
Bajgelman, Marcio Chaim
Oliveira, Paulo Sérgio Lopes de
Cordeiro, Marli Tenorio
Gonzales Gil, Laura Helena Vega
Pauletti, Bianca Alves
Granato, Daniela Campos
Paes Leme, Adriana Franco
Freitas-Junior, Lucio
Holanda de Freitas, Carolina Borsoi Moraes
Teixeira, Mauro Martins
Bevilacqua, Estela
Franchini, Kleber
Carvalho, Murilo
Pascoalino, Bruno Dos Santos
Cardoso, Alisson Campos
Costa, Ângela Maria Sousa
Pereira, Ana Helena Macedo
Santos, Luana Nunes
Saito, Ângela
Marques, Rafael Elias
Smetana, Juliana Helena Costa
Consonni, Silvio Roberto
Bandeira, Carla
Costa, Vivian Vasconcelos
Bajgelman, Marcio Chaim
Oliveira, Paulo Sérgio Lopes de
Cordeiro, Marli Tenorio
Gonzales Gil, Laura Helena Vega
Pauletti, Bianca Alves
Granato, Daniela Campos
Paes Leme, Adriana Franco
Freitas-Junior, Lucio
Holanda de Freitas, Carolina Borsoi Moraes
Teixeira, Mauro Martins
Bevilacqua, Estela
Franchini, Kleber
Affilliation
Fundação Oswaldo Cruz. Instituto Aggeu Magalhães. Recife, PE, Brasil
Abstract
The teratogenic mechanisms triggered by ZIKV are still obscure due to the lack of a suitable animal model. Here we present a mouse model of developmental disruption induced by ZIKV hematogenic infection. The model utilizes immunocompetent animals from wild-type FVB/NJ and C57BL/6J strains, providing a better analogy to the human condition than approaches involving immunodeficient, genetically modified animals, or direct ZIKV injection into the brain. When injected via the jugular vein into the blood of pregnant females harboring conceptuses from early gastrulation to organogenesis stages, akin to the human second and fifth week of pregnancy, ZIKV infects maternal tissues, placentas and embryos/fetuses. Early exposure to ZIKV at developmental day 5 (second week in humans) produced complex manifestations of anterior and posterior dysraphia and hydrocephalus, as well as severe malformations and delayed development in 10.5 days post-coitum (dpc) embryos. Exposure to the virus at 7.5-9.5 dpc induces intra-amniotic hemorrhage, widespread edema, and vascular rarefaction, often prominent in the cephalic region. At these stages, most affected embryos/fetuses displayed gross malformations and/or intrauterine growth restriction (IUGR), rather than isolated microcephaly. Disrupted conceptuses failed to achieve normal developmental landmarks and died in utero. Importantly, this is the only model so far to display dysraphia and hydrocephalus, the harbinger of microcephaly in humans, as well as arthrogryposis, a set of abnormal joint postures observed in the human setting. Late exposure to ZIKV at 12.5 dpc failed to produce noticeable malformations. We have thus characterized a developmental window of opportunity for ZIKV-induced teratogenesis encompassing early gastrulation, neurulation and early organogenesis stages. This should not, however, be interpreted as evidence for any safe developmental windows for ZIKV exposure. Late developmental abnormalities correlated with damage to the placenta, particularly to the labyrinthine layer, suggesting that circulatory changes are integral to the altered phenotypes.
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