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Inflammatory Depression Had Higher Kynurenine Metabolites

A 2026 biomarker study found kynurenine-pathway activation in inflammatory major depressive disorder (MDD), but not across all depression cases. Compared with non-inflammatory MDD and healthy controls, the inflammatory subgroup had higher pathway metabolites, and omega-3 treatment reduced several of them over 8 weeks.1 Research Highlights Inflammatory depression showed kynurenine activation: people with MDD and high-sensitivity …

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Parkinson’s Sex Differences: Male Flies Show Stronger Rotenone Stress

MHD featured image for Parkinson's sex differences and rotenone immune-gene response in Drosophila.

A 2026 Drosophila Parkinson’s model exposed male and female flies to 500 μM rotenone. By 60 days, male flies had worse survival/climbing than female flies; the paper is a vulnerability screen, not evidence that the same genes are ready human biomarkers.1 Research Highlights 500 μM rotenone split male and female flies: Iyer et al. used …

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Antrodia Silver Nanoparticles Reduced Parkinsonism Markers in 63 Rats

MHD featured image for Antrodia silver nanoparticles and Parkinsonism oxidative-stress markers.

A 2026 Parkinsonism study involving 63 male rats found that Antrodia cinnamomea plus citrate-stabilized silver nanoparticles reduced 6-OHDA motor, oxidative-stress, inflammatory, α-synuclein, and apoptosis markers, while dopamine and acetylcholine recovery remained nonsignificant. The useful claim is a multitarget preclinical signal, not a Parkinson’s disease treatment recommendation. Research Highlights Combination treatment looked strongest: Tekiner et al. …

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Cholestatic Liver Injury Alters Thalamus Fatigue Genes

MHD featured image for cholestatic liver disease, thalamus changes, fatigue, and TNF signaling.

A 2026 mouse study linked cholestatic liver injury to smaller thalamic volume than control injury-free mice, broad thalamus gene-expression changes, and partial pathway rescue after systemic tumor necrosis factor neutralization. Research Highlights Thalamic volume decreased: bile duct ligation (BDL; a mouse model of obstructive cholestatic liver injury) reduced thalamic volume vs. sham surgery by magnetic …

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Parasite Infections and Mental Health: 5 Gut-Brain Immune Routes

MHD featured image for parasite infections, neuroinflammation, and mental health.

A 2026 Journal of Neuroinflammation review organized parasite-linked neuropsychiatric risk around 5 gut-immune-brain routes; direct CNS parasitic disease carries the clearest signal, while broader mood and cognition associations usually remain observational and confounded.[1] Research Highlights 5 pathways converge on brain function: the 2026 review connected parasite exposure to peripheral cytokines, gut dysbiosis, intestinal permeability, blood-brain …

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Alzheimer’s Amyloid Plaques Recruit CD8 T Cells Through Type I Interferon

MHD featured image for Alzheimer's amyloid plaques, CD8 T cells, type I interferon, and CXCL10 signaling.

A 2026 single-cell and spatial-transcriptomics study of 21,156 brain immune cells found that late amyloid disease shifted interferon-driven neuroinflammation from microglia toward plaque-associated CD8 T cells, with T-cell frequency strongly tracking total amyloid deposits (Spearman rho = 0.844, p < 0.0001).1 The result does not turn Alzheimer’s disease into an autoimmune disease, but it makes …

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sCD27 Biomarker Flags Autoimmune Disease in Severe Psychiatric Disorders

MHD featured image for sCD27, autoimmune disease, severe psychiatric disorders, and neuroinflammation biomarker triage.

A 2026 immunopsychiatry cohort study found that soluble CD27 (sCD27), a marker of T-cell activation, was positive in cerebrospinal fluid in 23% of severe psychiatric patients selected for suspected immune involvement and in 88% of multiple sclerosis patients used as a positive-control group. In the psychiatric cohort, combined cerebrospinal fluid or blood sCD27 positivity was …

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