Lipids in the stratum corneum are key components in the barrier function of the skin. Changes in lipid composition related to eczematous diseases are well known, but limited data are available on variations within healthy skin. The objective of the present study was to compare ceramide subgroups and ceramide/cholesterol ratios in young, old, male and female healthy skin. A total of 55 participants with healthy skin was included in the study. Lipid profiles were correlated with transepidermal water loss and with information on dry skin from a questionnaire including 16 people. No statistically significant differences were found between young and old skin for ceramide subgroups or ceramide/cholesterol ratios, and there was no statistically significant correlation between answers about dry skin and ceramide levels. Interestingly, a statistically significant higher ceramide/cholesterol ratio was found for men than for women (p = 0.02).
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http://dx.doi.org/10.2340/00015555-0894 | DOI Listing |
Ultrasound Med Biol
January 2025
Institute of Biomedical Technologies, Auckland University of Technology, Auckland City, 1010, Auckland, New Zealand. Electronic address:
Objective: This study aims to evaluate the viability of a hypothesis for selective targeting of skin cancer cells by exploiting the spectral gap with healthy cells using analytical and numerical simulation.
Methods: The spectral gap was first identified using a viscoelastic dynamic model, with the physical and mechanical properties of healthy and cancerous skin cells deduced from previous experimental studies conducted on cell lines. The outcome of the analytical simulation was verified numerically using modal and harmonic analysis.
Sci Total Environ
January 2025
Department of Twin Research and Genetic Epidemiology, King's College London, 3-4th Floor South Wing Block D, St Thomas' Hospital, Westminster Bridge Road, London SE1 7EH, UK. Electronic address:
Heavy metals in our direct environment have profound effects on human health and while some are essential for life, others can be toxic. In vivo studies often focus on clinical features caused by overexposure to, or by deprivation of a heavy metal. However, to understand the cellular impact of heavy metals on health, studies in healthy volunteers before symptom onset are needed.
View Article and Find Full Text PDFGait Posture
January 2025
Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China; Academy for Engineering and Technology, Fudan University, Shanghai, China; Shanghai Sixth People's Hospital, Shanghai, China. Electronic address:
Background: Ankle joint moment and reaction force alteration after surgical treatment of chronic ankle instability (CAI) and osteochondral lesions of the talus (OLT) remains unknown.
Research Question: The current study aimed to investigate the in vivo kinetic effects of surgical management on patients with CAI and OLT and conduct a comparison with healthy subjects.
Methods: Eight patients with concurrent CAI and OLT were assessed in a stair descent setting prior to surgical management and one-year postoperatively.
J Cosmet Dermatol
January 2025
Scientis SA, Geneva, Switzerland.
Background: Skin aging is inevitable. Wrinkles, skin texture abnormalities, senile hyperpigmentation, loss of skin tone, dryness, atrophy, and telangiectasias represent some of the hallmarks of aged skin. Skin rejuvenation can be addressed by topical therapies, such as topical retinoids and antioxidants or physical modalities with energy-based devices, all providing acceptable outcomes.
View Article and Find Full Text PDFNeurol Res Int
January 2025
Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de San Luis Potosí, San Luis Potosi, Mexico.
Alpha-synuclein (ASyn), a marker of Parkinson's disease (PD) and other neurodegenerative processes, plays pivotal roles in neuronal nuclei and synapses. ASyn and its phosphorylated form at Serine 129 (p-ASyn) are involved in DNA protection and repair, processes altered in aging, neurodegeneration, and cancer. To analyze the localization of p-ASyn in skin biopsies of PD patients and melanoma.
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