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Migraine Linked to Cognitive Impairment in Chinese MR

Editorial card showing a brain with migraine pain pathways overlaid on genetic instrument schematic for Mendelian randomization.

A 2026 study by Bai et al. in Dialogues in Clinical Neuroscience uses Mendelian randomization (MR) — inherited genetic variants as a natural experiment to test causality — and concludes that migraines causally lower cognitive performance in a Han Chinese sample.1 The headline conclusion is plausible; the effect-size numbers in the popular MR shorthand (odds …

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Parkinson’s Metabolite Biomarkers Split 3 Patient Groups

MHD featured image for Parkinson's disease metabolite biomarkers and patient metabolic subgroups.

A 2026 Parkinson’s disease study used gene-expression data and genome-scale metabolic modeling to predict patient-level metabolite patterns, then separated 104 patients into 3 metabolic subgroups that were partly reproduced in an independent 81-patient validation dataset. Research Highlights Patient-level modeling found heterogeneity: Abdik et al. predicted secretion tendencies for 802 analyzable metabolites across 104 postmortem substantia …

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Perinatal Depression in Ethiopia: 22.49% Pooled Umbrella Prevalence

MHD featured image for perinatal depression prevalence in Ethiopia.

An Ethiopian umbrella review estimated perinatal depressive symptoms at 22.49% across 8 systematic reviews and meta-analyses. Antenatal and postnatal rates were similar, so the burden spans the whole perinatal window rather than clustering only after delivery.1 Research Highlights Overall pooled prevalence was 22.49%: Necho et al. combined 8 Ethiopian systematic reviews and meta-analyses covering 28 …

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U.S. Substance-Use Disorder DALYs Rose 213.5%: Opioids Led

A Global Burden of Disease analysis estimated that U.S. age-standardized substance-use disorder disability-adjusted life-year rates rose 213.5% from 1990 to 2019, with opioid use disorders producing the steepest increase and the largest state-level burden.1 Research Highlights U.S. cases rose sharply: prevalent substance-use disorder cases increased from 12.6 million in 1990 to 19.5 million in 2019.1 …

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GPR30 and Migraine: Estrogen Link Still Lacks Human Trials

MHD featured image for GPR30, estrogen signaling, trigeminal ganglion biology, and migraine.

A 2026 review argued that G protein-coupled receptor 30 may connect estrogen signaling, trigeminal pain pathways, and migraine biology, but migraine-specific human trials of GPR30-targeted drugs are still missing. Research Highlights The migraine rationale is hormone-linked: women have roughly 2 to 3 times the migraine prevalence of men, and 50% to 60% of women with …

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ATP11B-YAP Pathway Improved Memory and Ferroptosis in Aged Mice

MHD featured image for ATP11B-YAP signaling, ferroptosis, mitochondrial dysfunction, and age-related cognitive decline in aged mice.

A 2026 mouse and cell study found that ATP11B loss pushed aged brains toward hippocampal iron accumulation, mitochondrial dysfunction, neuronal ferroptosis, and worse memory behavior than wild-type comparison mice; ATP11B overexpression then improved multiple learning and memory tests in 18-month-old mice. Research Highlights Memory signal: ATP11B-deficient mice performed worse than wild-type mice on Morris water …

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