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Broad and potently neutralizing monoclonal antibodies isolated from human survivors of New World hantavirus infection
(2021)
Taylor B. Engdahl
;
Natalia A. Kuzmina
;
Adam J. Ronk
;
Chad E. Mire
;
Matthew A. Hyde
Scopus© Citations 23 2
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Inborn errors of OAS–RNase L in SARS-CoV-2–related multisystem inflammatory syndrome in children
(2023)
Danyel Lee
;
Jérémie Le Pen
;
Ahmad Yatim
;
Beihua Dong
;
Yann Aquino
<jats:p> Multisystem inflammatory syndrome in children (MIS-C) is a rare and severe condition that follows benign COVID-19. We report autosomal recessive deficiencies of <jats:italic>OAS1</jats:italic> , <jats:italic>OAS2</jats:italic> , or <jats:italic>RNASEL</jats:italic> in five unrelated children with MIS-C. The cytosolic double-stranded RNA (dsRNA)–sensing OAS1 and OAS2 generate 2′-5′-linked oligoadenylates (2-5A) that activate the single-stranded RNA–degrading ribonuclease L (RNase L). Monocytic cell lines and primary myeloid cells with OAS1, OAS2, or RNase L deficiencies produce excessive amounts of inflammatory cytokines upon dsRNA or severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) stimulation. Exogenous 2-5A suppresses cytokine production in OAS1-deficient but not RNase L–deficient cells. Cytokine production in RNase L–deficient cells is impaired by MDA5 or RIG-I deficiency and abolished by mitochondrial antiviral-signaling protein (MAVS) deficiency. Recessive OAS–RNase L deficiencies in these patients unleash the production of SARS-CoV-2–triggered, MAVS-mediated inflammatory cytokines by mononuclear phagocytes, thereby underlying MIS-C. </jats:p>
11Scopus© Citations 137
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Human seroepidemiology of Rickettsia and Orientia species in Chile – A cross-sectional study in five regions
(2020)
WEITZEL, THOMAS
;
Gerardo Acosta-Jamett
;
Ju Jiang
;
Constanza Martínez-Valdebenito
;
Christina M. Farris
11 1Scopus© Citations 11
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A 19 Year Analysis of Small Mammals Associated with Human Hantavirus Cases in Chile
(2019)
VIAL COX, MARIA CECILIA
<jats:p>Small mammals present in areas where hantavirus cardiopulmonary syndrome (HCPS) cases had occurred in central and southern Chile were captured and analyzed to evaluate the abundance of rodents and seroprevalence rates of antibodies to Andes orthohantavirus (ANDV). Sampling areas ranged from the Coquimbo to Aysén regions (30–45° S approx.) regions. Ninety-two sites in peridomestic and countryside areas were evaluated in 19 years of sampling. An antibody against ANDV was detected by strip immunoassay in 58 of 1847 specimens captured using Sherman traps. Of the eleven species of rodents sampled, Abrothrix olivacea, Oligoryzomys longicaudatus and Abrothrix hirta were the most frequently trapped. O. longicaudatus had the highest seropositivity rate, and by logistic regression analysis, O. longicaudatus of at least 60 g had 80% or higher probability to be seropositive. Sex, age and wounds were significantly related to seropositivity only for O. longicaudatus. Across administrative regions, the highest seropositivity was found in the El Maule region (34.8–36.2° S), and the highest number of HCPS cases was registered in the Aysén region. Our results highlight the importance of long term and geographically extended studies, particularly for highly fluctuating pathogens and their reservoirs, to understand the implications of the dynamics and transmission of zoonotic diseases in human populations.</jats:p>
Scopus© Citations 8 1

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