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Drug Development.
Alzheimers Dement
December 2024
University of Southern California, San Diego, USA.
Background: Recruitment of demographically diverse participants into Alzheimer's disease (AD) clinical trials, encompassing both screening and randomization, remains a consistent and persistent challenge contributing to underrepresentation of certain groups. Despite the exciting prospects of identifying therapeutic interventions for biomarker-eligible, cognitively unimpaired individuals, these studies grapple with the inherent complexities of AD trials coupled with intricate and time-consuming screening processes. Addressing this the issue of underrepresentation necessitates concerted and intentional efforts that prioritize inclusivity and equitable access to enroll adults meeting study criteria, reflecting the demographic and social diversity of North America.
View Article and Find Full Text PDFBackground: Understanding the fundamental differences between the human and pre-human brain is a prerequisite for designing meaningful models and therapies for AD. Expressed CHRFAM7A, a human restricted gene with carrier frequency of 75% in the human population predicts profound translational significance.
Method: The physiological role of CHRFAM7A in human brain is explored using multiomics approach on 600 post mortem human brain tissue samples (ROSMAP).
Sex-related differences in the morphology of rectal mucosa-associated lymphoid tissues in C57BL/6NCrSlc mice.
Histol Histopathol
December 2024
Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan.
Sex hormones regulate gut function and mucosal immunity; however, their specific effects on the mucosa-associated lymphoid tissue (MALT) in the rectum of mammals remain unclear. Here, we aimed to investigate the influence of sex on MALT in the rectum of mammals by focusing on the rectal mucosa-associated lymphoid tissues (RMALTs) of C57BL/6NCrSIc mice. Histological analysis revealed that RMALTs were predominantly located in the lamina propria and submucosa of the rectal mucosa, with a significant sex-related difference in the distance from the anorectal junction to the first appearance of the RMALT.
View Article and Find Full Text PDFBackground: Hypertension is a risk factor for cognitive impairment and dementia. Anti-hypertensives (AHT) are commonly used in old age, but their association with cognition and brain pathology is not well understood.
Method: To investigate the relation of AHT with change in cognitive function and postmortem brain pathology, we evaluated 4,207 older persons without known dementia at enrollment and a subset of 1880 participants who died and came to autopsy.
Drug Development.
Alzheimers Dement
December 2024
Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Background: Acetylcholine, a neurotransmitter critical for cognitive functions, including attention, memory, and sociability, is essential for maintaining synaptic integrity. Deficits in acetylcholine levels are linked to cognitive impairments. Heterozygous VAChT KD (VAChT KDHET) mice, characterized by reduced vesicular acetylcholine transporter protein production, exhibit cognitive impairments due to diminished acetylcholine release.
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