ArticleiScience2023
Determining the structure of protein-bound ceramides, essential lipids for skin barrier function.
Article in iScience, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
12 citing papers in PubMed, 21 citations in OpenAlex.
- A Randomized Controlled Trial of the Genistein Plus Bakuchiol and Vitamins (GENSkin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI) · 2026Trial
- Discovery of Dihydroxy-Ketone-Type Protein-Bound Ceramides as the Dominant Type in Human Stratum Corneum.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2026Article
- Skin Lipid Dysregulation in Atopic Dermatitis and Related Inflammatory Skin Diseases.Allergy, asthma & immunology research · 2026Review
- Acid ceramidase ASAH1 is a key regulator of epidermal ceramide levels and composition.The Journal of biological chemistry · 2026Article
- Skin phenotype diversity across populations: from skin morphology to molecular phenotype.Frontiers in medicine · 2026Review
- Analysis of the Thiol Adduction of Linoleate 9,10-Dihydroxy-11ACS omega · 2025Article
- The bioactive sphingolipid playbook. A primer for the uninitiated as well as sphingolipidologists.Journal of lipid research · 2025Review
- Relationship between time-dependent epidermal ceramide composition changes and skin barrier function in adult mice.Molecular biology of the cell · 2025Article
- Don't Be Surprised When These Surprise You: Some Infrequently Studied Sphingoid Bases, Metabolites, and Factors That Should Be Kept in Mind During Sphingolipidomic Studies.International journal of molecular sciences · 2025Review
- The Octadecanoids: Synthesis and Bioactivity of 18-Carbon Oxygenated Fatty Acids in Mammals, Bacteria, and Fungi.Chemical reviews · 2025Review
- Skin Lipid Barrier: Structure, Function and Metabolism.Allergy, asthma & immunology research · 2024Review
- Correlations between Skin Condition Parameters and Ceramide Profiles in the Stratum Corneum of Healthy Individuals.International journal of molecular sciences · 2024Article
Corrections and comments
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Protein-bound ceramides, specialized ceramides covalently bound to corneocyte surface proteins, are essential for skin permeability barrier function. However, their exact structure and target amino acid residues are unknown. Here, we found that epoxy-enone (EE) ceramides, precursors of protein-bound ceramides, as well as their synthetic analog, formed stable conjugates only with Cys among nucleophilic amino acids. NMR spectroscopy revealed that the β-carbon of the enone was attached by the thiol group of Cys via a Michael addition reaction. We confirmed the presence of Cys-bound EE ceramides in mouse epidermis by mass spectrometry analysis of protease-digested epidermis samples. EE ceramides were reversibly released from protein-bound ceramides via sulfoxide elimination. We found that protein-bound ceramides with reversible release properties accounted for approximately 60% of total protein-bound ceramides, indicating that Cys-bound EE ceramides are the predominant protein-bound ceramides. Our findings provide clues to the molecular mechanism of skin barrier formation by protein-bound ceramides.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.