Research Article Open Access

Exploring the Relationship Between Skin Barrier Function, Sensitivity, and Repair Mechanisms

Xiaoqing Yan1, Yusong Shi1 and Jiguang Yang1
  • 1 Department of Medicine, Jinan Dermatosis Prevention and Control Hospital, China, Jingsan Road, Huaiyin District, Jinan City, China

Abstract

For healthy skin, the skin's barrier function must remain maintained. Many different molecular while immunological signaling mechanisms are involved in skin barrier control. The control of a healthy skin barrier, particularly acid mantle maintenance and proper amounts of ceramides, may help dermatologists develop remedies for skin barrier disruption disorders. In contrast, new medicines could focus on signaling pathways to offer more effective treatment for patients by identifying which skin barrier alterations are related with certain illnesses. For example, psoriasis and atopic dermatitis. A functioning model of the epidermis barrier has been recently published, and the skin's anatomical layers are well delineated. Many skin disorders include disturbance of the skin's protective barrier, and for some, like atopic dermatitis, moisturization is the first line of defense. The purpose of this study was to examine the skin barrier through the lens of the function approach, paying special attention to how moisturizers aid in the maintenance and repair of the skin barrier's many functional layers. The construction and function of the skin barrier are maintained by four interdependent layers: chemical, microbiologic, physical, and immunologic. More than one study found that moisturisers improved transepidermal water loss by targeting disturbance that affected all four of these layers via different pathways. To further fortify the skin's physical barrier, occlusives obstruct the Stratum Corneum (SC) surface, humectants attract water from the dermis to the epidermis, and emollients absorb into the SC. By promoting normal enzymatic activity, raising ceramide synthesis, and creating an optimum environment for commensal microbes, acidic moisturizers strengthen the skin's chemical barrier. By lowering permeability and, by extension, allergen penetration and sensitization, regular moisturizing may fortify the immunologic skin barrier. Disruptions to the skin barrier have distinct effects on the physical, chemical, microbiological, and immunologic layers. In order to keep everything in balance and make repairs easier, moisturizers work by penetrating all seven layers of the skin's protective barrier. Age, gender, race/ethnicity, and skin type are some of the factors that influence skin characteristics. Furthermore, lifestyle factors and body mass index may affect skin features, which in turn vary by place on the body. Despite the skin's primary role as a barrier, it is nonetheless able to allow the absorption of some chemicals Changes in skin function along with general well-being may result from a wide range of environmental and lifestyle variables. The characteristics and functions of the skin are closely related.

American Journal of Biochemistry and Biotechnology
Volume 21 No. 4, 2025, 498-511

DOI: https://doi.org/10.3844/ajbbsp.2025.498.511

Submitted On: 5 February 2025 Published On: 15 February 2026

How to Cite: Yan, X., Shi, Y. & Yang, J. (2025). Exploring the Relationship Between Skin Barrier Function, Sensitivity, and Repair Mechanisms. American Journal of Biochemistry and Biotechnology, 21(4), 498-511. https://doi.org/10.3844/ajbbsp.2025.498.511

  • 46 Views
  • 13 Downloads
  • 0 Citations

Download

Keywords

  • Skin Barrier Function
  • Transepidermal Water Loss
  • Moisturizers
  • Ceramides
  • Atopic Dermatitis
  • Psoriasis
  • Dermatology
  • Stratum Corneum