Basic Science and Pathogenesis.

Background: In Alzheimer's disease (AD), histone acetylation is disrupted, suggesting loss of transcriptional control. Moreover, converging evidence suggests an age- and AD-dependent loss of transcription controlled by all-trans-retinoic acid (ATRA), the bioactive metabolite of vitamin A (VA). Antioxidant depletion causes oxidative stress (OS).

Basic Science and Pathogenesis.

Background: Disrupted balance between amyloidogenic and non-amyloidogenic pathways leads to cognitive decline in Alzheimer's disease (AD). Evidence suggests vitamin A (VA) supplementation favors the non-amyloidogenic pathway through upregulation of α-secretase. Originally used to map embryonic retinoic acid (RA) signaling, RARE-LacZ mice possess multiple LacZ genes controlled by retinoic acid response elements (RAREs).

A bespoke water T-maze apparatus and protocol: an optimized, reliable, and repeatable method for screening learning, memory, and executive functioning in laboratory mice.

The Morris Water Maze (MWM) is the most commonly used assay for evaluating learning and memory in laboratory mice. Despite its widespread use, contemporary reviews have highlighted substantial methodological variation in experimental protocols and that the associated testing procedures are acutely (each trial) and chronically (testing across days) stressful; stress impairs attention, memory consolidation and the retrieval of learned information. Moreover, the interpretation of behavior within the MWM is often difficult because of wall hugging, non-spatial swim strategies, floating, and jumping off the escape platform.

Oral pre-exposure prophylaxis implementation in South Africa: a case study of USAID-supported programs.

Since the introduction of oral pre-exposure prophylaxis (PrEP) in 2016, countries have successfully scaled-up PrEP to populations at risk of HIV acquisition, including key populations, serodiscordant couples and pregnant women. Between 2016 and 2023, there were over 5.6 million oral PrEP initiations globally.

Determining If Post-Injury Financial Distress Was Preexisting or Injury-Induced: A Prospective Cohort Study of Patients with Lower-Extremity Trauma.

Background: Previous research has estimated that over one-half of patients with orthopaedic trauma experience financial distress after the injury. However, it is unknown what proportion of patients lived under financial distress before the injury and, therefore, the causal effect of the injury on financial distress. This study examined changes in financial distress after the injury and factors associated with new post-injury financial distress.