Social support may buffer the effect of ε4 allele on cognition in older adults.

Apolipoprotein E () ε4 is a genetic risk factor for Alzheimer's disease (AD). Social support may confer protection against cognitive decline even in the presence of ε4. We examined the relationship among ε4 allele(s) carrier status, social support (overall and sub-sources), and cognition in 115 older adults (72.

Association of circulating ketone bodies with cognitive performance and dementia in the Multi-Ethnic Study of Atherosclerosis (MESA).

Introduction: Growing interest centers on the association between circulating ketone bodies (KB) and cognitive function, notably in aging and neurodegenerative diseases.

Methods: Associations of plasma KB with incident dementia and cognitive performances were examined among Multi-Ethnic Study of Atherosclerosis (MESA) participants. KB were measured using plasma samples collected following an overnight fasting at Exam 1 (2000-02) and detailed cognitive testing at Exam 5 (2010-2012,  = 4392), Exam 6 (2016-2018,  = 1838), and in MESA-MIND (2019-2021,  = 2060).

In vitro diagnostics of drug allergies.

In vitro diagnostics for drug hypersensitivity reactions distinguish between serological and cellular-based tests. A serological test used for the diagnosis of immediate type reactions is the detection of specific IgE antibodies. The cellular tests include the basophil activation test for immediate type reactions and the lymphocyte transformation test, which is mainly used to detect delayed type hypersensitivity reactions.

The effects of brain serotonin deficiency on the behavioral and neurogenesis-promoting effects of voluntary exercise in tryptophan hydroxylase 2 (R439H) knock-in mice.

Exercise is known to reduce depression and anxiety symptoms. Although the cellular and molecular mechanisms underlying this effect remain unknown, exercise-induced increases in neurotransmitter release and hippocampal neurogenesis have been hypothesized to play key roles. One neurotransmitter that has been implicated in both antidepressant-like effects and the regulation of hippocampal neurogenesis is serotonin (5-HT).

Examining a Preclinical Alzheimer's Cognitive Composite for Telehealth Administration for Reliability Between In-Person and Remote Cognitive Testing with Neuroimaging Biomarkers.

Background: The preclinical Alzheimer's cognitive composite (PACC) was developed for in-person administration to capture subtle cognitive decline. At the outset of the COVID-19 pandemic, cognitive testing was increasingly performed remotely by telephone or video administration. It is desirable to have a harmonized composite measurement derived from both in-person and remote assessments for identifying cognitive changes and to examine its relationship with common neuroimaging biomarkers.