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The purpose of this study was to identify pediatric eosinophilic fasciitis, which is an extremely rare condition, in order to describe their clinical, paraclinical, and therapeutic characteristics. We made a call for observations via societies for pediatric rheumatology in France and surrounding countries and collected clinical and paraclinical data of the cases fulfilling the diagnostic criteria. Eight patients under 18 years of age with confirmed eosinophilic fasciitis followed between April 2004 and July 2022 in France, Germany, Italy, and Spain were included.

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Skin tags, medically known as acrochordons, are harmless growths of the epidermis that commonly develop in areas where the skin folds, such as the neck, armpits, or groin. While usually asymptomatic, these lesions can cause discomfort from rubbing or cosmetic issues. They are more prevalent in middle-aged and older individuals and are often correlated with conditions such as obesity, diabetes, and insulin resistance.

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Multiple roles for retinoid signaling in craniofacial development.

Curr Top Dev Biol

January 2025

Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, United States. Electronic address:

Retinoic acid (RA) signaling plays multiple essential roles in development of the head and face. Animal models with mutations in genes involved in RA signaling have enabled understanding of craniofacial morphogenic processes that are regulated by the retinoid pathway. During craniofacial morphogenesis RA signaling is active in spatially restricted domains defined by the expression of genes involved in RA production and RA breakdown.

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Early retinoic acid signaling organizes the body axis and defines domains for the forelimb and eye.

Curr Top Dev Biol

January 2025

Development, Aging, and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, United States. Electronic address:

All-trans RA (ATRA) is a small molecule derived from retinol (vitamin A) that directly controls gene expression at the transcriptional level by serving as a ligand for nuclear ATRA receptors. ATRA is produced by ATRA-generating enzymes that convert retinol to retinaldehyde (retinol dehydrogenase; RDH10) followed by conversion of retinaldehyde to ATRA (retinaldehyde dehydrogenase; ALDH1A1, ALDH1A2, or ALDH1A3). Determining what ATRA normally does during vertebrate development has been challenging as studies employing ATRA gain-of-function (RA treatment) often do not agree with genetic loss-of-function studies that remove ATRA via knockouts of ATRA-generating enzymes.

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Background: Photodynamic therapy (PDT) is a noninvasive cancer treatment that works by using light to stimulate the production of excessive cytotoxic reactive oxygen species (ROS), which effectively eliminates tumor cells. However, the therapeutic effects of PDT are often limited by tumor hypoxia, which prevents effective tumor cell elimination. The oxygen (O) consumption during PDT can further exacerbate hypoxia, leading to post-treatment adverse events.

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