Publications by authors named "Kianna Billman"

Article Synopsis
  • * The researchers used published datasets to show that the gene expression linked to MS1 is present in severe COVID-19 cases and can be replicated in lab models using healthy hematopoietic stem cells.
  • * They found that cytokines IL-6 and IL-10 in patient plasma promote the development of myeloid cells and are essential for activating the MS1 gene program, indicating a role for these cytokines in immune responses during severe infections.
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Article Synopsis
  • * An expanded state of CD14+ monocytes (MS1) linked to poor outcomes in sepsis and COVID-19 was identified, suggesting a potential role in disease prognosis.
  • * The research shows that severe infections trigger systemic cytokines (IL-6 and IL-10) that lead to the expansion of immunosuppressive MS1 cells, indicating their importance in understanding and managing sepsis.
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Dysregulation of the immune response to bacterial infection can lead to sepsis, a condition with high mortality. Multiple whole-blood gene-expression studies have defined sepsis-associated molecular signatures, but have not resolved changes in transcriptional states of specific cell types. Here, we used single-cell RNA-sequencing to profile the blood of people with sepsis (n = 29) across three clinical cohorts with corresponding controls (n = 36).

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Profiling multiple omic layers in a single cell enables the discovery and analysis of biological phenomena that are not apparent from analysis of mono-omic data. While methods for multi-omic profiling have been reported, their adoption has been limited due to high cost and complex workflows. Here, we present a simple method for joint profiling of gene expression and chromatin accessibility in tens to hundreds of single cells.

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Specialized immune cell subsets are involved in autoimmune disease, cancer immunity, and infectious disease through a diverse range of functions mediated by overlapping pathways and signals. However, subset-specific responses may not be detectable in analyses of whole blood samples, and no efficient approach for profiling cell subsets at high throughput from small samples is available. We present a low-input microfluidic system for sorting immune cells into subsets and profiling their gene expression.

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