Category Biology/Biotechnology

Molecular ‘Xulprit’ caught driving Cell Death and Inflammation

Highlights
•IFNγ and TLR signaling causes cell death via caspase-8, iNOS, and BAX/BAK
•Caspase-8 regulates BCL2 and iNOS expression to activate BAX/BAK independent of BID
•iNOS causes caspase-8 cleavage and destabilizes the BAX/BAK inhibitors MCL1 and A1
•Caspase-8 and iNOS promote severe disease upon SARS-CoV-2 infection of mice

A WEHI-led study has identified a molecular ‘culprit’ responsible for causing damaging levels of cell death and inflammation in the body. The findings could lead to improved treatment options for a range of conditions driven by inflammatory cell death, including the SARS-CoV-2 virus.

Cell death is an important part of the body’s immune response to infection...

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How Fat Cells in the Skin help Fight Acne

Microscopic image of an inflamed pimple with cathelicidin stained red, fat cells stained green and the nuclei of every cell stained blue. Because cathelicidin is produced from fat cells, their staining merges together.

Researchers have discovered a specific antimicrobial skin cell and the role it plays in acne development, which could result in more targeted treatment options. Acne is among the most common skin diseases in the United States, according to the American Academy of Dermatology Association, affecting up to 50 million Americans each year. It is also among the least studied.

It’s known that hair follicles assist in the development of a pimple, but new research suggests the skin cells outside of these hair follicles play a larger role...

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Key Brain Mechanisms for Organizing Memories in Time

Convergence research project integrated neurobiology with data science techniques. Using experiments and a deep machine learning data analysis approach, scientists uncovered the fundamental workings of the hippocampus region of the brain as it organizes memories into time sequences. The work could help future research into cognitive disorders such as Alzheimer’s disease and other causes of dementia.

Combining electrophysiological recording techniques in rodents with a statistical machine learning analysis of huge troves of data, the UCI researchers uncovered evidence suggesting that the hippocampal network encodes and preserves progressions of experiences to aid in decision-making. The team’s work is the subject of a paper published recently in Nature Communications.

“Our brain ...

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Highly Responsive Immune Cells seem to be Beneficial for the Brain

New insights into the mechanisms of neurodegenerative diseases. Findings by researchers from Germany support the view that hyperactive immune cells in the brain can have a protective effect in the course of neurodegenerative diseases. Experts from Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), Ludwig-Maximilians-Universität München (LMU) and LMU Klinikum München report on this in the scientific magazine The EMBO Journal. The scientists are currently considering that modulating the activity of immune cells in the brain via a receptor called TREM2 may significantly impact neurodegenerative disease processes. Thus, they see activating TREM2 as a promising approach for drug research.

The immune cells of the brain — called “microglia” — act against pathogens, help to c...

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