Role of MicroRNAs in Regulating Sarcoplasmic Reticulum Calcium Handling and Their Implications for Cardiomyocyte Function and Heart Disease.

The regulation of calcium signaling within cardiomyocytes is pivotal for maintaining cardiac function, with disruptions in sarcoplasmic reticulum (SR) calcium handling linked to various heart diseases. This review explores the emerging role of microRNAs (miRNAs) in modulating SR calcium dynamics, highlighting their influence on cardiomyocyte maturation, function, and disease progression. We present a comprehensive overview of the mechanisms by which specific miRNAs, such as miR-1, miR-24, and miR-22, regulate key components of calcium handling, including ryanodine receptors, SERCA, and NCX.

Change in frailty status in the 12 months following solid organ transplantation: a systematic review and meta-analysis.

Objectives: To investigate if frailty status alters following solid organ transplantation (lung, liver, kidney and heart) without rehabilitation intervention.

Research Design And Methods: Studies published between 1 January 2000 and 30 May 2023 were searched across five databases. Studies measuring frailty, using a validated or established frailty measure, pre- and post-transplant were included.

Intraventricular Hemorrhage and Survival, Multimorbidity, and Neurodevelopment.

Importance: Intraventricular hemorrhage (IVH) has proven to be a challenging and enduring complication of prematurity. However, its association with neurodevelopment across the spectrum of IVH severity, independent of prematurity, and in the context of contemporary care remains uncertain.

Objective: To evaluate national trends in IVH diagnosis and the association with survival and neurodevelopmental outcomes at 2 years of age.

Corrigendum: Development and validation of dependence and craving measures specific to athletes who use anabolic-androgenic steroids.

[This corrects the article DOI: 10.3389/fpsyg.2024.

Coming in hot: a qualitative investigation into perceptions of parents and doctors of reasons for the presentation of children with fever to the emergency department in England.

Introduction: Paediatric emergency department (ED) attendances and admissions in England are increasing. Fever is a common presenting problem for these attendances. Anxiety and misperceptions surrounding appropriate management of fever persist among parents.