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Genes that might explain why some healthy young people develop severe COVID-19 symptomsecstasy lexapro an ensemble intelligence approach with seven algorithms was applied to multiple partitions of the RNA-seq data (see Methods) to classify NC versus C patients, performing differential analysis on each partition of the data. An ensemble ranking score across six of the seven algorithms and all partitions of the data was then determined, and the top 600 of those genes were used as the input for structural causal modeling to derive a putative causal network. To support the key findings from the first patient cohort, RNA-seq data from a second patient cohort consisting of 81 critical and 73 recovered critical patients were used. The data was partitioned analogously to the first patient cohort, but only the top 600 features from the first patient cohort were used to assess the informativeness of the gene signature. (C) Cytokines and immune cells were quantified. WGS data were used for eQTL analysis together with the gene counts from the RNA-seq. Proteomics data were subjected to differential protein expression and nGOseq enrichment analyses. (D) The key pathways and drivers resulting from the omics analyses in (B and C) were validated in a second cohort of 81 critical and 73 recovered critical patients. The differential expression of ADAM9, the main driver gene, was compared to publicly available bulk RNA-seq data. Finally, ex vivo infection experiments with SARS-CoV-2 were conducted to validate a driver gene candidate. Credit: DOI: 10.1126/scitranslmed.abj7521″ width=”800″ height=”530″>

An international team of researchers has isolated five genes that are more active in young people with severe COVID-19 symptoms than in those with less severe symptoms. In their paper published in the journal Science Translational Medicine, the group describes their genetic analysis of young infected people with no known contributing factors for the disease.

Some healthy young people, despite having no apparent underlying conditions, still develop very serious COVID symptoms. Why this happens remains a mystery. In this new effort, the researchers found a possible clue—genes that appear to reduce the body’s ability to fight the disease when activated.

The work involved collecting plasma samples from 72 young, hospitalized COVID patients, 47 of whom were critically ill. None of those sampled had any underlying conditions that might explain their symptoms. The team also collected samples from 22 infected young people who had few or no symptoms to serve as a control group. The researchers noted at the outset that those patients who were the most ill also suffered from increased inflammation and coagulation. They then conducted whole-genome sequencing on the samples, along with RNA sequencing, cell proteomics, cytokine profiling and immunophenotyping. They also used a machine-learning application to spot patterns in the genes. Their analysis revealed five genes that were more active in the patients with severe symptoms. One, ADAM9, was found to be the most prevalent.

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