ArticleInternational journal of molecular sciences2025
Mass Spectrometry Imaging Elucidates the Precise Localization and Site-Specific Functions of Skin Lipids.
Article in International journal of molecular sciences, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Visualizing the molecular landscape of skin: applications and perspectives of mass spectrometry imaging.Analytical and bioanalytical chemistry · 2026Review
- Optical, Tomographic, and Mass Spectrometry Imaging Methods for Burn Wounds: Capabilities, Limitations, and Clinical Potential.Biomedicines · 2026Review
- Dysregulated cholesterol metabolism in genodermatoses: implications for systemic disease and therapeutic strategies.Frontiers in cell and developmental biology · 2026Review
- SERPINA12 in skin: molecular mechanisms and roles in adipocytes, psoriasis, and palmoplantar keratoderma.Frontiers in immunology · 2026Review
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Authors and funding
4 authors.
Funding
Abstract
Lipids are essential for the skin, playing a crucial role in forming plasma membranes and maintaining the skin's permeability barrier and hydration. Intercellular lipids fill the spaces between corneocytes and contribute to the barrier function. Lipid abnormalities in the skin have been observed in many skin diseases, including atopic dermatitis and psoriasis. However, the specific localization and roles of skin lipids at particular sites remain incompletely elucidated due to the limited methods available for comprehensive lipid analysis. This study aims to precisely determine the localization of skin lipids, especially intercellular lipids, and investigate their roles and metabolism using mass spectrometry imaging (MSI). We conducted high-resolution (spatial resolution: 5 µm) matrix-assisted laser desorption/ionization (MALDI)-MSI on the lower back and buttocks and created overlay images of skin lipids to clarify their precise localizations. Ceramide was localized in the outermost layer among intercellular lipids. Cholesterol and free fatty acids were present in the stratum corneum but were at trace levels in the outermost layer. Cholesterol sulfate was abundant in the granular layer and gradually decreased in the stratum corneum, promoting desquamation. Phospholipids were confined to the viable epidermis (stratum corneum-/epidermis+), which forms the plasma membrane. A significant increase in mass intensity in the stratum corneum was observed for ceramide, sphingoid base, cholesterol, and free fatty acids, along with a decrease in phospholipids compared with those in the viable epidermis, based on region of interest analysis (Mann-Whitney test,
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