The Role of Hydrogen Sulfide (H2S) in Epigenetic Regulation of Neurodegenerative Diseases: A Systematic Review.

This review explores the emerging role of hydrogen sulfide (H2S) in modulating epigenetic mechanisms involved in neurodegenerative diseases. Accumulating evidence has begun to elucidate the multifaceted ways in which H2S influences the epigenetic landscape and, subsequently, the progression of various neurodegenerative disorders, including Alzheimer's, Parkinson's, and Huntington's disease. H2S can modulate key components of the epigenetic machinery, such as DNA methylation, histone modifications, and non-coding RNAs, impacting gene expression and cellular functions relevant to neuronal survival, inflammation, and synaptic plasticity. We synthesize recent research that positions H2S as an essential player within this intricate network, with the potential to open new therapeutic avenues for these currently incurable conditions. Despite significant progress, there remains a considerable gap in our understanding of the precise molecular mechanisms and the potential therapeutic implications of modulating H2S levels or its downstream targets. We conclude by identifying future directions for research aimed at exploiting the therapeutic potential of H2S in neurodegenerative diseases.

Usefulness of the Edmonton Frail Scale in Assessing the Impact of Heart Failure on Frailty.

BACKGROUND/AIM: The association of frailty with heart failure (HF) is common in the elderly, and its presence is a poor prognostic factor; it increases the risk of falls, disability, hospitalization, and mortality. The aim of this prospective study was to assess the incidence of physical frailty in patients with HF and the role of physical exercise in improving physical performance. PATIENTS AND METHODS: A total of 141 patients with musculoskeletal pathology, aged over 65 years, who followed a specific physical training program were included. The patients were assigned to two groups: HF patients -group HF (n=53) and patients without HF -group N-HF (n=88). RESULTS: At cohort level, mild and moderate frailty was detected in 20.56% of patients enrolled in the study (n=29). Severe form of frailty was identified in 2.83% of cases (n=4). The prevalence of mild, moderate, and severe frailty in the two groups differed significantly (p<0.05). Patients with mild frailty and moderate frailty in the HF group represented 24.52% compared to 18.18% in the N-HF group (p=0.007). Severe frailty was present in 5.66% in the HF group, not significantly different from the N-HF group (1.13%), p=0.317. The values obtained in the functional independence and functional performance domains were significantly improved at the reassessment after 6 months. CONCLUSION: Exercise-based rehabilitation is a primary therapy for improving physical performance, reflected by increased independence related to daily activities and functional performance in HF patients.