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Background: Fibroblast growth factor 21 (FGF21) and Methyltransferase-like 14 (METTL14) have been identified to be involved in spinal cord injury (SCI). However, whether FGF21 functioned in SCI via METTL14-induced N6-methyladenosine (m6A) modification remains unclear.
Materials And Methods: PC12 cells were exposed to lipopolysaccharide (LPS) in vitro.
Menopause-induced 17β-estradiol and progesterone loss increases senescence markers, matrix disassembly and degeneration in mouse cartilage.
Nat Aging
January 2025
Discovery Center for Musculoskeletal Recovery, Schoen Adams Research Institute at Spaulding, Boston, MA, USA.
Female individuals who are post-menopausal present with higher incidence of knee osteoarthritis (KOA) than male counterparts; however, the mechanisms underlying this disparity are unknown. The most commonly used preclinical models lack human-relevant menopausal phenotypes, which may contribute to our incomplete understanding of sex-specific differences in KOA pathogenesis. Here we chemically induced menopause in middle-aged (14-16 months) C57/BL6N female mice.
View Article and Find Full Text PDFA macro-transection model of brain trauma for neuromaterial testing with functional electrophysiological readouts.
Neural Regen Res
January 2025
School of Medicine, Keele University, Newcastle-under-Lyme, UK.
Functional recovery in penetrating neurological injury is hampered by a lack of clinical regenerative therapies. Biomaterial therapies show promise as medical materials for neural repair through immunomodulation, structural support, and delivery of therapeutic biomolecules. However, a lack of facile and pathology-mimetic models for therapeutic testing is a bottleneck in neural tissue engineering research.
View Article and Find Full Text PDFIncomplete remyelination via therapeutically enhanced oligodendrogenesis is sufficient to recover visual cortical function.
Nat Commun
January 2025
Department of Cell and Developmental Biology, University of Colorado School of Medicine, Aurora, CO, USA.
Myelin loss induces neural dysfunction and contributes to the pathophysiology of neurodegenerative diseases, injury conditions, and aging. Because remyelination is often incomplete, better understanding endogenous remyelination and developing remyelination therapies that restore neural function are clinical imperatives. Here, we use in vivo two-photon microscopy and electrophysiology to study the dynamics of endogenous and therapeutic-induced cortical remyelination and functional recovery after cuprizone-mediated demyelination in mice.
View Article and Find Full Text PDFAge- and sex-specific differences in myocardial sympathetic tone and left ventricular remodeling following myocardial injury.
Biol Sex Differ
January 2025
Department of Nuclear Medicine, University Hospital Zurich, Zurich, CH-8091, Switzerland.
Background: Presentations and outcomes of acute myocardial infarction (MI) differ between women and men, with the worst outcomes being reported in younger women. Mental stress induced ischemia and sympathetic activation have been suggested to play a prominent role in the pathogenesis of MI in younger women, however, the impact of sex hormones on these parameters remains unknown.
Methods: The effect of sex hormones and age on myocardial infarct size and myocardial sympathetic activity (MSA) was assessed in male and female, as well as young (4-6 months) and aged (20-22 months) FVB/N mice (n = 106, 60 gonadectomized and 46 sham-operated animals) who underwent in vivo [C]meta-hydroxyephedrine ([C]mHED) positron emission tomography (PET) and cardiac magnetic resonance (CMR) imaging 24 h after a 30 min myocardial ischemic injury.
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