Valéria Beatriz do Valle

Mrs. Valéria Beatriz do Valle


Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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19 April 2022 in Biomolecules
Verified
Journal Article
Open access
PDF file
Pedro Vieira da Silva NetoPedro Vieira da Silva Neto
Pedro Vieira da Silva Neto
VVValéria Beatriz do Valle
Valéria Beatriz do Valle
CFCarlos Fuzo
Carlos Fuzo
TFTalita Morais Fernandes
Talita Morais Fernandes
DTDiana Mota Toro
Diana Mota Toro
OGon behalf of the IMMUNOCOVID Study Group
on behalf of the IMMUNOCOVID Study Group
Patients with COVID-19 predominantly have a respiratory tract infection and acute lung failure is the most severe complication. While the molecular basis of SARS-CoV-2 immunopathology is still unknown, it is well established that lung infection is associated with hyper-inflammation and tissue damage. Matrix metalloproteinases (MMPs) contribute to tissue destruction in many pathological situations, and the activity of MMPs in the lung leads to the release of bioactive mediators with inflammatory properties. We sought to characterize a scenario in which MMPs could influence the lung pathogenesis of COVID-19. Although we observed high diversity of MMPs in lung tissue from COVID-19 patients by proteomics, we specified the expression and enzyme activity of MMP-2 in tracheal-aspirate fluid (TAF) samples from intubated COVID-19 and non-COVID-19 patients. Moreover, the expression of MMP-8 was positively correlated with MMP-2 levels and possible shedding of the immunosuppression mediator sHLA-G and sTREM-1. Together, overexpression of the MMP-2/MMP-8 axis, in addition to neutrophil infiltration and products, such as reactive oxygen species (ROS), increased lipid peroxidation that could promote intensive destruction of lung tissue in severe COVID-19. Thus, the inhibition of MMPs can be a novel target and promising treatment strategy in severe COVID-19.