TL;DR: A 2026 medRxiv preprint linked higher blood inflammatory markers with diffusion MRI signs of altered white-matter microstructure in 457 dementia-free middle-aged and older adults, especially for a combined cytokine score and orientation dispersion index. Key Findings 457 dementia-free participants: The cross-sectional study examined adults with a mean age of 63.82 years and used blood …
TL;DR: A 2026 study in Neurology found that higher autonomic symptom burden in moderate-advanced dementia with Lewy bodies was linked to worse cognitive fluctuations, higher neuropsychiatric burden, and lower caregiver quality of life over time. Key Findings Autonomic burden was measured longitudinally across 189 people with moderate-advanced dementia with Lewy bodies. Higher Autonomic Symptom Checklist …
TL;DR: A 2026 medRxiv preprint found that specific AD8 dementia-screening items, especially judgment, repetition, finances, tool use, and daily memory problems, tracked functional and psychosocial vulnerability in 144 Chinese-speaking older adults. Key Findings Small community sample: The cross-sectional study included 144 Chinese-speaking adults with a mean age of 73.1 years. Three AD8 domains: Exploratory factor …
TL;DR: A 2026 randomized clinical trial in the Journal of Sport and Health Science assigned 130 midlife adults to 150 minutes/week aerobic exercise or no-exercise control for 1 year and found sustained lower long-term cortisol in the exercise group. Key Findings Year-long randomized trial in 130 midlife adults: Participants aged 26 to 58 were randomly …
TL;DR: A 2025 study in The Journal of Prevention of Alzheimer’s Disease found that stress internalization, not acculturation or activity engagement, predicted memory decline across three waves in 1,528 older Chinese Americans. Key Findings Stress internalization predicted longitudinal memory decline: A latent factor combining greater perceived stress, greater hopelessness, and lower conscientiousness was the single …
TL;DR: A 2026 MIDUS mediation study in Brain, Behavior, & Immunity – Health found that social asymmetry was associated with greater chronic disease burden, while chronic disease burden mediated links between social asymmetry and episodic memory and executive function, while allostatic load did not. Key Findings Study type: a structural equation modeling study of social …
TL;DR: A 2026 medRxiv preprint used quantitative multi-parametric MRI mapping in 245 BeLOVE participants and found that white matter hyperintensities had lower MTsat and R1 plus higher proton density, with nearby normal-appearing white matter also showing microstructural changes linked to MoCA, a brief cognitive screening score. Key Findings 245 MRI participants: The analysis used cerebral …
TL;DR: A 2026 mouse preprint in bioRxiv reported that small-molecule IGF1R inhibitors, drugs that block insulin-like growth factor 1 receptor signaling, protected several healthspan measures in aging mice, but the tested compounds also carried major safety and drug-development problems. Key Findings 150 aging mice: Researchers assigned 55-week-old C57BL/6 mice to control diet, PPP, or NVP-ADW742, …
TL;DR: A 2026 Nature Communications study found that mouse hippocampal CA3 connectivity shifts from dense-random early wiring to sparse-structured adult wiring, with weaker single synapses that make memory-network output depend on coordinated input rather than one strong connection. Key Findings CA3 connectivity transforms from random to structured during postnatal development: Early in life (P7-8 mice) …
TL;DR: A 2026 preprint longitudinal cohort analysis in medRxiv found that later-born cohorts showed higher memory levels entering old age and slower rates of memory decline, while the projected 20-year cohort advantage at age 80 was large enough in the model to account for a reported 13% per-decade decline in dementia incidence. Key Findings Birth-cohort …
