Ageing limits stemness and tumorigenesis by reprogramming iron homeostasis.

Ageing is associated with a decline in the number and fitness of adult stem cells. Ageing-associated loss of stemness is posited to suppress tumorigenesis, but this hypothesis has not been tested in vivo. Here we use physiologically aged autochthonous genetically engineered mouse models and primary cells to demonstrate that ageing suppresses lung cancer initiation and progression by degrading the stemness of the alveolar cell of origin.

Enhancing Regulatory T cell function by mevalonate pathway inhibition prevents liver fibrosis.

Liver fibrosis is a well-established risk factor for liver cancer development. Despite extensive mechanistic studies on liver fibrosis, the role of the immune cell network in fibrotic disease remains poorly understood. In this study, we demonstrate that regulatory T cells (Tregs) are involved in preventing liver fibrosis by regulating the mevalonate pathway.

Functional Characterization of RseC in the SoxR Reducing System and Its Role in Oxidative Stress Response in .

The reducing system of SoxR consists of a putative electron transfer system encoded by the operon, RseC encoded from the unlinked operon, and ApbE. RseC is composed of two transmembrane helices, with both the N-terminal and C-terminal domains located in the cytoplasm. The N-terminal domain has a four-cysteine motif, CXCXCXC, in the cytoplasm, with the latter three cysteines highly conserved in RseC homologs, allowing the SoxR reducer complex to function in .

Expression and delivery of HA1-M2e antigen using an innovative attenuated Salmonella-mediated delivery system confers promising protection against H9N2 avian influenza challenge.

This study explores a dual expression vector system for delivering prokaryotic and eukaryotic antigens to improve conventional vaccination strategies. To enhance immune protection against H9N2 avian influenza virus (AIV), which threatens poultry and humans, we used the previously constructed pJHL270 and pJHL305 plasmids with the Ptrc and CMV promoters to stimulate MHC class II and I responses through exogenous and endogenous antigenic presentation. Salmonella Gallinarum (SG), a delivery vector, was engineered to have defective lipopolysaccharide structures through lon, pagL, and rfaL deletion.

Single-cell multiomics reveal divergent effects of DNMT3A- and TET2-mutant clonal hematopoiesis in inflammatory response.

DNMT3A and TET2 are epigenetic regulator genes commonly mutated in age-related clonal hematopoiesis (CH). Despite having opposed epigenetic functions, these mutations are associated with increased all-cause mortality and a low risk for progression to hematologic neoplasms. Although individual impacts on the epigenome have been described using different model systems, the phenotypic complexity in humans remains to be elucidated.

Effect of Macrolide Exposure on Tailored Helicobacter pylori Eradication Therapy and Antibiotic Resistance Profiles: A Prospective Study Using the Drug Utilization Review System.

Background/aims: Determining antibiotic use history accurately is challenging due to its reliance on patient recall. By determining macrolide exposure using the Korean drug utilization review (DUR) system, we analyzed the impact of previous macrolide use on antibiotic resistance profiles and compared the eradication rate between tailored therapy based on macrolide exposure history and empirical therapy.

Methods: Patients with confirmed Helicobacter pylori (H.

2024 Hong Kong College of Obstetricians and Gynaecologists Guidelines for cervical cancer prevention and screening.

Primary prevention of cervical cancer is best achieved by vaccinating girls with a prophylactic human papillomavirus (HPV) vaccine. Despite the high efficacy of such vaccines, cervical cancer screening remains necessary because current vaccines do not offer full protection. Secondary prevention via cervical screening should target all women from age 25 years or at the onset of sexual activity, whichever occurs later, until age 64 years.

Survey on Alopecia Areata Patients' Reported Factors that Determine Severity of Alopecia Areata: A Nationwide Multicenter Study.

Background: Alopecia areata (AA) is characterized by hair loss on the scalp and body, significantly impacting patients' quality of life based on its severity.

Objective: This study aims to identify crucial factors influencing the perception of severe AA from the patients' viewpoint.

Methods: A web-based survey was conducted among AA patients attending dermatology departments at 21 university hospitals in Korea.

Biomarkers for Short-Term Omalizumab Response in Chronic Spontaneous Urticaria.

Background: Omalizumab, a monoclonal antibody targeting immunoglobulin E (IgE), is approved for adults and adolescents (12 years or older) with chronic spontaneous urticaria (CSU) that does not respond to high-dose antihistamines. In Korea, there is limited research on predictive biomarkers for omalizumab response in CSU patients.

Objective: This retrospective, single-institution study aimed to identify clinical parameters predicting omalizumab response in Korean CSU patients.

EPRS1-mediated fibroblast activation and mitochondrial dysfunction promote kidney fibrosis.

Kidney fibrosis causes irreversible structural damage in chronic kidney disease and is characterized by aberrant extracellular matrix (ECM) accumulation. Although glutamyl-prolyl-tRNA synthetase 1 (EPRS1) is a crucial enzyme involved in proline-rich protein synthesis, its role in kidney fibrosis remains unclear. The present study revealed that EPRS1 expression levels were increased in the fibrotic kidneys of patients and mice, especially in fibroblasts and proximal tubular epithelial cells, on the basis of single-cell analysis and immunostaining of fibrotic kidneys.

Global Burden of Vaccine-Associated Chronic Urticaria, 2010-2023: From the Global Pharmacovigilance Database.

Purpose: The etiology and pathophysiology of vaccine-associated chronic urticaria (CU) remain unclear, particularly during the coronavirus disease 2019 (COVID-19) pandemic. Thus, this study aimed to comprehensively investigate the global burden and long-term trends of vaccine-associated CU, with a focus on the associated vaccines and the distribution of cases across different age groups and sexes.

Methods: Using data from the World Health Organization international pharmacovigilance database (VigiBase), which encompasses reports from 156 countries and territories between 1968 and 2023, we systematically analyzed the global burden and long-term trends in vaccine-associated CU reports (total individual case safety reports = 131,255,418).

Long Term Surgical Outcome of Canal-Tympanoplasty in Patients with Schuknecht Type B Congenital Aural Stenosis.

Background: Congenital aural atresia (CAA) is a complex condition that can present in various forms, including Schuknecht type B stenosis, characterized by a congenitally narrow bony external auditory canal (EAC). This study aims to evaluate the long-term surgical outcomes of canal-tympanoplasty in patients with CAA Schuknecht type B.

Methods: The study included 21 ears diagnosed with CAA Schuknecht type B that underwent canal-tympanoplasty.

Characterization of meat quality, storage stability, flavor-related compounds, and their relationship in Korean Woorimatdag No. 2 chicken breast meat during cold storage.

We evaluated the quality, storage stability, and flavor-related compounds of breast meat from a novel Korean native chicken breed (Woorimatdag No. 2; WRMD2) and commercial broiler (CB) during seven days of aerobic cold storage. We found that pH and drip loss increased gradually during storage and WRMD2 exhibited a significantly lower pH and higher drip loss than CB.

L5-S3 Compared to L5-S2 Full-Endoscopic Rhizotomy and Ablation Under a Navigation System for Sacroiliac Joint Pain: A Comparative Study.

Background: Chronic low back pain (CLBP) with sacroiliac joint (SIJ) involvement is a prevalent issue in health care. Surgical intervention, employing an endoscopic technique with a navigation system, targets and ablates nociceptive nerve fibers associated with SIJ pain, although the clinical effect of omitting rhizotomy of the lateral sacral branch of S3 remains uncertain.

Objectives: This study aimed to compare the clinical outcomes of 2 full-endoscopic rhizotomy and ablation (FERA) techniques for SIJ pain and to determine the effect of omitting rhizotomy of the lateral sacral branch of S3 on patient outcomes.

A preliminary study of disaster media use as a coping mechanism and the psychological impact of the 2014 Sewol ferry disaster.

The 2014 Sewol ferry disaster is the only South Korean mass casualty incident broadcasted in real time and the first instance of the nation collectively experiencing a disaster through social media. Compared to the large body of literature on disaster media as a stressor, its role as a coping tool remains underexplored. We explored the associations between coping styles in disaster media use and the psychological impact of the Sewol ferry disaster among the South Korean general public.

Multiomic analyses reveal new targets of polycomb repressor complex 2 in Schwann lineage cells and malignant peripheral nerve sheath tumors.

Background: Malignant peripheral nerve sheath tumors (MPNSTs) can arise from atypical neurofibromas (ANF). Loss of the polycomb repressor complex 2 (PRC2) is a common event. Previous studies on PRC2-regulated genes in MPNST used genetic add-back experiments in highly aneuploid MPNST cell lines which may miss PRC2-regulated genes in -mutant ANF-like precursor cells.