The necessity of this work lies in the innovative application of nanotherapy to target anti-ageing skin cells, utilising ursolic acid from Linn for precise and effective skin rejuvenation at a molecular level. Ursolic acid (UA), a pentacyclic triterpenoid compound, found in abundance in the plant Linn, has long been recognised for its potential anti-inflammatory, antioxidant, and anti-ageing properties. Despite its promising benefits, the direct application of UA in skincare has been limited, primarily due to its low aqueous solubility and poor skin penetration. This study explores a groundbreaking molecular approach, employing nanotechnology to enhance the delivery of UA, targeting skin cells for effective anti-ageing treatment. Through a comprehensive investigation, UA was encapsulated into biocompatible nanocarriers, ensuring increased stability, improved dermal penetration, and sustained release of the compound at the targeted site. By harnessing the specificity and efficiency of nanodelivery systems, the study achieved significant improvement in the absorption of UA in the deeper layers of the skin. This targeted intervention at the cellular and molecular level paved the way for maximising the potential of UA as an anti-ageing agent. In conclusion, the nanotherapeutic delivery of UA from Linn offers a paradigm shift in skincare, bringing forth a promising molecular strategy to combat skin ageing. With further advancements, this approach has the potential to revolutionise anti-ageing treatments, integrating traditional botanical wisdom with cutting-edge nanotechnology.
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http://dx.doi.org/10.1080/14786419.2025.2474157 | DOI Listing |
Cancer Discov
March 2025
University of California, San Francisco, San Francisco, CA, United States.
Historical studies performed nearly a century ago using mouse skin models identified two key steps in cancer evolution: initiation, a likely mutational event, and promotion, driven by inflammation and cell proliferation. Initiation was proposed to be permanent, with promotion as the critical rate-limiting step for cancer development. Here, we carried out whole genome sequencing to demonstrate that initiated cells with thousands of mutagen-induced mutations can persist for long periods and are not removed by cell competition or by immune intervention, thus mimicking the persistence of cells with cancer driver mutations in normal human tissues.
View Article and Find Full Text PDFJ Immunol
January 2025
Department of Biological Sciences, California State University San Marcos, San Marcos, CA, United States.
Obesity is associated with comorbidities including type 2 diabetes, chronic nonhealing wounds, and psoriasis. Normally, skin homeostasis and repair is regulated through the production of cytokines and growth factors derived from skin-resident cells including epidermal γδ T cells. However, epidermal γδ T cells exhibit reduced proliferation and defective growth factor and cytokine production during obesity and type 2 diabetes.
View Article and Find Full Text PDFJ Immunol
January 2025
Division of Infectious Diseases, Center for Inflammation and Tolerance, Department of Pediatrics, Cincinnati Children's Hospital, University of Cincinnati College of Medicine, Cincinnati, OH, United States.
Organ transplant recipients require continual immune-suppressive therapies to sustain allograft acceptance. Although medication nonadherence is a major cause of rejection, the mechanisms responsible for graft loss in this clinically relevant context among individuals with preceding graft acceptance remain uncertain. Here, we demonstrate that skin allograft acceptance in mice maintained with clinically relevant immune-suppressive therapies, tacrolimus and mycophenolate, sensitizes hypofunctional PD1hi graft-specific CD8+ T cells.
View Article and Find Full Text PDFJ Immunol
February 2025
Herman B Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States.
Food allergy has had a rapid rise in prevalence, and thus it is important to identify approaches to limit the development of food allergy early in life. Because maternal dietary supplementation with α-tocopherol (α-T), an isoform of vitamin E, during pregnancy and nursing increases neonate plasma levels of α-T and can limit neonate development of other allergies, we hypothesized that α-T can limit development of food allergy. To assess this, male mice with mutations in their skin barrier genes (FT-/- mice) were mated with wild-type females that received a diet supplemented with α-tocopherol or a control diet.
View Article and Find Full Text PDFJ Immunol
March 2025
School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104 United States.
Interleukin 33 (IL-33) is a pleiotropic cytokine released from diverse cell types that regulate both pro- and anti-inflammatory responses during pathogen infection. However, it remains unclear whether IL-33 controls key aspects of cutaneous immunity against skin-penetrating parasites. In this study, mice percutaneously infected with the parasitic helminth Strongyloides ratti were investigated to understand mechanisms of anamnestic immunity at the skin barrier.
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