AI Article Synopsis
Article Abstract
Stimulation of the aryl hydrocarbon receptor (AHR) by xenobiotics is known to affect epidermal differentiation and skin barrier formation. The physiological role of endogenous AHR signaling in keratinocyte differentiation is not known. We used murine and human skin models to address the hypothesis that AHR activation is required for normal keratinocyte differentiation. Using transcriptome analysis of Ahr(-/-) and Ahr(+/+) murine keratinocytes, we found significant enrichment of differentially expressed genes linked to epidermal differentiation. Primary Ahr(-/-) keratinocytes showed a significant reduction in terminal differentiation gene and protein expression, similar to Ahr(+/+) keratinocytes treated with AHR antagonists GNF351 and CH223191, or the selective AHR modulator (SAhRM) SGA360. In vitro keratinocyte differentiation led to increased AHR levels and subsequent nuclear translocation, followed by induced CYP1A1 gene expression. Monolayer cultured primary human keratinocytes treated with AHR antagonists also showed an impaired terminal differentiation program. Inactivation of AHR activity during human skin equivalent development severely impaired epidermal stratification, terminal differentiation protein expression, and stratum corneum formation. As disturbed epidermal differentiation is a main feature of many skin diseases, pharmacological agents targeting AHR signaling or future identification of endogenous keratinocyte-derived AHR ligands should be considered as potential new drugs in dermatology.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4402116 | PMC |
| http://dx.doi.org/10.1038/jid.2015.6 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Clinical Study of Intradermal Injection of Non-Crosslinked Sodium Hyaluronate Combined With Human Epidermal Growth Factor in the Treatment of Skin Barrier Injury in Plateau Area.
J Cosmet Dermatol
December 2024
Department of Plastic Surgery, Affiliated Calmette Hospital of Kunming Medical University, Kunming, China.
Background: The Yunnan-Guizhou Plateau's high-altitude setting is characterized by intense solar ultraviolet radiation, a significant environmental stressor that frequently leads to skin barrier damage. This damage presents clinically as erythema, itching, and desquamation, underscoring the need for effective reparative interventions.
Aims: The objective of this study was to assess the therapeutic efficacy of a novel treatment protocol that integrates non-crosslinked hyaluronic acid (HA) injection with microneedle application of human epidermal growth factor (hEGF) for the restoration of skin barrier function in regions of high altitude.
Revealing the Therapeutic Potential of Stem Cells in Burn Healing: A Deeper Understanding of the Therapeutic Mechanisms of Epidermal Stem Cells and Mesenchymal Stem Cells.
Stem Cells Int
December 2024
Department of Burn Surgery, The First Affiliated Hospital of Naval Medical University, Shanghai 200433, China.
Burns are a global public health issue and a major cause of disability and death around the world. Stem cells, which are the undifferentiated cells with the potential for indefinite proliferation and multilineage differentiation, have the ability to replace injured skin and facilitate the wound repair process through paracrine mechanisms. In light of this, the present study aims to conduct a bibliometric analysis in order to identify research hotspots of stem cell-related burns and assess global research tendencies.
View Article and Find Full Text PDFClinical cues for distinguishing bullous fixed drug eruption from Stevens-Johnson syndrome: A case report.
SAGE Open Med Case Rep
December 2024
Department of Dermatology, KCU-GME Consortium/Advanced Dermatology and Cosmetic Surgery, Orlando, FL, USA.
This case report discusses two clinical encounters of a 62-year-old Hispanic woman initially hospitalized with suspected Stevens-Johnson syndrome, later correctly diagnosed with bullous fixed drug eruption during an outpatient visit for a similar eruption. The first encounter involved an extensive evaluation and an 11-day hospital stay, while the second was managed successfully as an outpatient with oral prednisone. This report highlights the importance of differentiating bullous fixed drug eruption from Stevens-Johnson syndrome/toxic epidermal necrolysis and emphasizes the need for a collaborative approach between Primary Care Providers and Dermatology to ensure optimal patient care.
View Article and Find Full Text PDFA Rare Case of Triple-Positive Breast Cancer With Eventual Triple-Negative Small Bowel Metastasis.
Cureus
November 2024
Surgical Oncology, HCA Florida Westside Hospital, Plantation, USA.
Invasive lobular breast cancer (ILBC) is a common cause of breast cancer. Prognosis is dependent on many factors such as metastasis location and hormone receptor positivity. A 59-year-old postmenopausal African-American female who was referred to our clinic in May of 2022 presented with a suspicious small bowel lesion seen on surveillance imaging.
View Article and Find Full Text PDFMolecular monitoring of short- and long-term transcriptional effects of hair growth stimulating agents.
PLoS One
December 2024
Institute of Human Genetics, School of Medicine & University Hospital Bonn, University of Bonn, Bonn, Germany.
Male-pattern hair loss (MPHL) is the most common form of hair loss in humans. Limited treatment options exist, which are not curative and vary in efficacy and invasiveness. Therapeutic and cosmetic hair growth stimulating agents that alleviate hair loss at a low risk of side effects are therefore of interest.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!