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BATF2 is a regulator of interferon-γ signaling in astrocytes during neuroinflammation

Mechanism of neuroinflammation protection by astrocytes.

How astrocytes controls neuroinflammation is not clearly understood.

The researchers demonstrate that the upregulation of basic leucine zipper ATF-like transcription factor (BATF)2 downstream of IFNg regulates the inflammatory potential of astrocytes during neuroinflammation.

In vivo evidence suggests that BATF2 limits CNS autoimmunity and the expression of IFNg-driven inflammatory mediators.

Mechanistically, BATF2 binds and prevents the overexpression of IFN regulatory factor (IRF)1 and IRF1 targets such as caspase-1. Batf2−/− mice exhibit exacerbated clinical disease severity in a murine model of central nervous system autoimmunity and express increased astrocyte-specific IRF1 and caspase-1, suggesting an amplified IFN response in vivo.

They also demonstrate that BATF2 expressed primarily in astrocytes within multiple sclerosis lesions and that this expression is colocalized with IRF1.

These data suggest that BATF2 contributes to protective mechanisms in astrocytes during chronic neuroinflammation. https://sciencemission.com/BATF2-and-neuroinflammation

Brain Cell Protein May Explain Why Some People Resist Stress

Additional experiments revealed that mice given access to an exercise wheel or treated with antidepressants also exhibited increased CB1 receptor levels in astrocytes. Furthermore, analysis of human brain tissue from the Douglas-Bell Canada Brain Bank indicated that individuals with major depression had lower astrocytic CB1 receptor levels compared to those without depression or those who had received antidepressant treatment.

Implications for mental health interventions

These findings raise the possibility of developing treatments that selectively activate CB1 receptors in astrocytes to mitigate anxiety and depression. However, the challenge remains in limiting activation to astrocytes, as prolonged CB1 receptor stimulation in neurons can lead to side effects affecting alertness, anxiety and appetite. Until targeted pharmacological interventions become available, engaging in physical activity may help protect against stress-related mental health conditions by enhancing CB1 receptor expression.

New CRISPR Systems Discovered, Enhancing Gene Editing Precision

What makes us unique? Different from most, yet similar to a few? What shapes our physical, behavioral, and even mental makeup? The answer lies in our genes.

Passed from parents to their offspring, genes contain the information that specifies physical and biological traits.

But that’s not all. Genes are also responsible for diseases. Faulty genes can cause all kinds of issues that can manifest as birth defects, chronic diseases, or developmental problems.

UCLA discovers first stroke rehabilitation drug to repair brain damage

A new study by UCLA Health has discovered what researchers say is the first drug to fully reproduce the effects of physical stroke rehabilitation in model mice, following from human studies.

The findings, published in Nature Communications, tested two candidate drugs derived from their studies on the mechanism of the brain effects of rehabilitation, of which one resulted in significant recovery in movement control after stroke in the mouse model.

Stroke is the leading cause of adult disability because most patients do not fully recover from the effects of stroke. There are no drugs in the field of stroke recovery, requiring stroke patients to undergo physical rehabilitation which has shown to be only modestly effective.

Synaptic architecture of a memory engram in the mouse hippocampus

Memory engrams are formed through experience-dependent plasticity of neural circuits, but their detailed architectures remain unresolved. Using three-dimensional electron microscopy, we performed nanoscale reconstructions of the hippocampal CA3-CA1 pathway after chemogenetic labeling of cellular ensembles recruited during associative learning. Neurons with a remote history of activity coinciding with memory acquisition showed no strong preference for wiring with each other. Instead, their connectomes expanded through multisynaptic boutons independently of the coactivation state of postsynaptic partners. The rewiring of ensembles representing an initial engram was accompanied by input-specific, spatially restricted upscaling of individual synapses, as well as remodeling of mitochondria, smooth endoplasmic reticulum, and interactions with astrocytes.

Levodopa may improve motivation in depression linked to high inflammation

A study from Emory University suggests that levodopa, a medication that increases dopamine levels in the brain, may help treat individuals with depression who experience motivational impairments due to high inflammation. Researchers found that a common blood test measuring C-reactive protein (CRP), a blood biomarker of inflammation produced by the liver, could help determine which patients are most likely to respond to repeated doses of levodopa.

The findings, published in the March 2025 print edition of Brain, Behavior and Immunity, show that in participants with CRP levels above 2 mg/L, daily administration of levodopa improved connectivity within a key brain reward pathway—the to the —after just one week of treatment across a range of doses.

While about half of the participants responded best to a lower dose of 150 mg/day, the other half required up to 450 mg/day for levodopa to effectively overcome the effects of inflammation on this dopamine-rich reward circuit.

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