O objetivo deste estudo foi identificar e reunir os principais achados disponíveis no começo da pandemia, acerca das alterações laboratoriais de pacientes internados com COVID-19 e discutir a predominância dessas alterações na gravidade do curso da doença. Trata-se de uma revisão sistemática de literatura, restringida a publicações até abril de 2020, utilizando as bases de dados Lilacs e Pubmed. Um total de 381 publicações foram encontradas nas bases de dados consultadas e destas, 17 publicações foram elegíveis para análise conforme os critérios de inclusão e exclusão. Parâmetros laboratoriais como a redução de linfócitos e elevação de D-dímeros, lactato desidrogenase e proteína C reativa parecem estar ligados à infecção pelo SARS-CoV-2 e podem servir como indicadores prognósticos da doença. A linfocitopenia e o aumento de D-dímeros são marcadores relacionados ao agravamento da doença e a desfechos desfavoráveis como óbito.
The objective of this study was to identify and gather the main findings available at the beginning of the pandemic, regarding laboratory alterations of hospitalized patients with COVID-19 and to discuss the predominance of these alterations in the severity of the course of the disease. This is a systematic literature review, restricted to publications until April 2020, using the Lilacs and Pubmed databases. A total of 381 publications were found in the consulted databases and of these, 17 publications were eligible for analysis according to the inclusion and exclusion criteria. Laboratory parameters such as the reduction of lymphocytes and the elevation of D-dimers, lactate dehydrogenase and C-reactive protein appear to be linked to SARS-CoV-2 infection and may serve as prognostic indicators of the disease. Lymphocytopenia and increased D-dimers are markers related to disease worsening and unfavorable outcomes such as death.
Clinical Laboratory Techniques , Systematic Reviews as Topic , COVID-19 , Reference Standards , Biomarkers
The objective of study was to investigate changes caused by ovariectomy (OVX) on aversive and non-aversive memories, as well as on cytoskeleton phosphorylating system and on vitamin D receptor (VDR) immunocontent in hippocampus. The neuroprotective role of vitamin D was also investigated. Ninety-day-old female Wistar rats were divided into four groups: SHAM, OVX, VITAMIN D and OVX + VITAMIN D; 30 days after the OVX, vitamin D supplementation (500 IU/kg), by gavage, for 30 days was started. Results showed that OVX impaired short-term and long-term recognition, and long-term aversive memories. OVX altered hippocampal cytoskeleton phosphorylating system, evidenced by the hyperphosphorylation of glial fibrillary acidic protein (GFAP), low molecular weight neurofilament subunit (NFL), medium molecular weight neurofilament subunit (NFM) and high molecular weight neurofilament subunit (NFH), and increased the immunocontent of c-Jun N-terminal protein kinases (JNK), Ca2+/calmodulin-dependent protein kinase II (PKCaMII) and of the sites phosphorylated lysine-serine-proline (KSP) repeats, Ser55 and Ser57. Vitamin D reversed the effects caused by OVX on cytoskeleton in hippocampus, but it was not able to reverse the effects on memory.
Cholecalciferol/therapeutic use , Cytoskeleton/drug effects , Hippocampus/drug effects , Memory Disorders/drug therapy , Neuroprotective Agents/therapeutic use , Ovariectomy/adverse effects , Animals , Avoidance Learning/drug effects , Cholecalciferol/pharmacology , Cytoskeletal Proteins/metabolism , Drug Evaluation, Preclinical , Exploratory Behavior/drug effects , Female , Hippocampus/metabolism , Hippocampus/pathology , Nerve Tissue Proteins/metabolism , Neuroprotective Agents/pharmacology , Phosphorylation , Protein Processing, Post-Translational/drug effects , Random Allocation , Rats , Rats, Wistar
