Protective Barriers Provided by the Epidermis DOI Open Access

Sarah de Szalay,

Philip W. Wertz

International Journal of Molecular Sciences, Journal Year: 2023, Volume and Issue: 24(4), P. 3145 - 3145

Published: Feb. 5, 2023

The skin is the largest organ of body and consists an epidermis, dermis subcutaneous adipose tissue. surface area often stated to be about 1.8 2 m2 represents our interface with environment; however, when one considers that microorganisms live in hair follicles can enter sweat ducts, interacts this aspect environment becomes 25–30 m2. Although all layers skin, including tissue, participate antimicrobial defense, review will focus mainly on role factors epidermis at surface. outermost layer stratum corneum, physically tough chemically inert which protects against numerous environmental stresses. It provides a permeability barrier attributable lipids intercellular spaces between corneocytes. In addition barrier, there innate involves lipids, peptides proteins. has low pH poor certain nutrients, limits range survive there. Melanin trans-urocanic acid provide protection from UV radiation, Langerhans cells are poised monitor local trigger immune response as needed. Each these protective barriers discussed.

Language: Английский

The wound microbiota: microbial mechanisms of impaired wound healing and infection DOI

Aayushi Uberoi,

Amelia R. McCready-Vangi,

Elizabeth A. Grice

et al.

Nature Reviews Microbiology, Journal Year: 2024, Volume and Issue: 22(8), P. 507 - 521

Published: April 4, 2024

Language: Английский

Citations

208

Wound healing and microbiome, an unexpected relationship DOI Creative Commons
Ludivine Canchy, Delphine Kérob,

Ann’Laure Demessant

et al.

Journal of the European Academy of Dermatology and Venereology, Journal Year: 2023, Volume and Issue: 37(S3), P. 7 - 15

Published: Jan. 13, 2023

Abstract Skin wounds are common and represent a major public health economical problem, with risks of complications significant negative impact on the quality life patients. Cutaneous wound healing is tightly regulated process resulting in restoration tissue integrity. Wound involves interaction several skin, immune vascular cells, growth factors cytokines. However, external actors can play an important role healing, such as skin microbiome, which microbial commensal collection bacteria, fungi viruses inhabiting skin. Indeed, recent advances have featured interactions, within environment, between different species host system. This article reviews relationship microbiome process. Although cutaneous potential entry site for infection, either detrimental or beneficial healing. Thus, targeting could essential part management.

Language: Английский

Citations

78

Electrospun Polycaprolactone/Chitosan Nanofibers Containing Cordia myxa Fruit Extract as Potential Biocompatible Antibacterial Wound Dressings DOI Creative Commons
Amal Alyamani, Mastafa H. Al-Musawi, Salim Albukhaty

et al.

Molecules, Journal Year: 2023, Volume and Issue: 28(6), P. 2501 - 2501

Published: March 9, 2023

The goal of the current work was to create an antibacterial agent by using polycaprolactone/chitosan (PCL/CH) nanofibers loaded with Cordia myxa fruit extract (CMFE) as antimicrobial for wound dressing. Several characteristics, including morphological, physicomechanical, and mechanical surface wettability, activity, cell viability, in vitro drug release, were investigated. inclusion CMFE PCL/CH led increased swelling capability maximum weight loss. SEM images PCL/CH/CMFE mat showed a uniform topology free beads average fiber diameter 195.378 nm. Excellent activity shown towards Escherichia coli (31.34 ± 0.42 mm), Salmonella enterica (30.27 0.57 Staphylococcus aureus (21.31 0.17 Bacillus subtilis (27.53 1.53 Pseudomonas aeruginosa (22.17 0.12 mm) based on inhibition zone assay. sample containing 5 wt% had lower water contact angle (47 3.7°), high porosity, compared neat mat. release 5% CMFE-loaded proven be anomalous non-Fickian diffusion Korsmeyer-Peppas model. Compared pure PCL membrane, PCL-CH/CMFE membrane exhibited suitable cytocompatibility L929 cells. In conclusion, fabricated nanofibrous films demonstrated bioavailability, properties that can used dressings.

Language: Английский

Citations

58

Commensal Cutibacterium acnes induce epidermal lipid synthesis important for skin barrier function DOI Creative Commons
Samia Almoughrabie, Laura Cau, Kellen Cavagnero

et al.

Science Advances, Journal Year: 2023, Volume and Issue: 9(33)

Published: Aug. 18, 2023

Lipid synthesis is necessary for formation of epithelial barriers and homeostasis with external microbes. An analysis the response human keratinocytes to several different commensal bacteria on skin revealed that Cutibacterium acnes induced a large increase in essential lipids including triglycerides, ceramides, cholesterol, free fatty acids. A similar occurred mouse epidermis affected acne. Further showed this was mediated by short-chain acids produced dependent increased expression lipid genes glycerol-3-phosphate-acyltransferase-3. Inhibition or RNA silencing peroxisome proliferator-activated receptor-α (PPARα), but not PPARβ PPARγ, blocked response. The keratinocyte content improved innate barrier functions antimicrobial activity, paracellular diffusion, transepidermal water loss. These results reveal metabolites from common bacterium have previously unappreciated influence composition epidermal lipids.

Language: Английский

Citations

58

Natural Ingredients of Transdermal Drug Delivery Systems as Permeation Enhancers of Active Substances through the Stratum Corneum DOI Creative Commons
Natalia Schäfer, Radosław Balwierz, Paweł Biernat

et al.

Molecular Pharmaceutics, Journal Year: 2023, Volume and Issue: 20(7), P. 3278 - 3297

Published: June 6, 2023

In recent years, significant progress has been made in transdermal drug delivery systems, but there is still a search for enhancers that can improve the absorption of active substances through stratum corneum. Although permeation have described scientific literature, use naturally occurring this role particular interest, because they offer high level safety use, with low risk skin irritation, and efficiency. addition, these ingredients are biodegradable, easily available, widely accepted by consumers due to growing trust natural compounds. This article provides information on derived compounds systems help them penetrate skin. The work focuses components found corneum such as sterols, ceramides, oleic acid, urea. Penetration nature, mainly plants, terpenes, polysaccharides, fatty acids also described. mechanism action discussed, methods assessing their penetration efficiency provided. Our review covers original papers from 2017 2022, supplemented papers, then older publications used supplement or verify data. shown increase transport compete synthetic counterparts.

Language: Английский

Citations

56

Emerging role of the host microbiome in neuropsychiatric disorders: overview and future directions DOI Creative Commons
Kenji Hashimoto

Molecular Psychiatry, Journal Year: 2023, Volume and Issue: 28(9), P. 3625 - 3637

Published: Sept. 1, 2023

Abstract The human body harbors a diverse ecosystem of microorganisms, including bacteria, viruses, and fungi, collectively known as the microbiota. Current research is increasingly focusing on potential association between microbiota various neuropsychiatric disorders. resides in parts body, such oral cavity, nasal passages, lungs, gut, skin, bladder, vagina. gut gastrointestinal tract has received particular attention due to its high abundance role psychiatric neurodegenerative However, presents other tissues, though less abundant, also plays crucial immune system homeostasis, thus influencing development progression For example, imbalance associated periodontitis might increase risk for Additionally, studies using postmortem brain samples have detected widespread presence bacteria brains patients with Alzheimer’s disease. This article provides an overview emerging host disorders discusses future directions, underlying biological mechanisms, reliable biomarkers microbiota, microbiota-targeted interventions, this field.

Language: Английский

Citations

56

Longitudinal profiling of the microbiome at four body sites reveals core stability and individualized dynamics during health and disease DOI Creative Commons
Xin Zhou, Xiaotao Shen, Jethro S. Johnson

et al.

Cell Host & Microbe, Journal Year: 2024, Volume and Issue: 32(4), P. 506 - 526.e9

Published: March 12, 2024

To understand the dynamic interplay between human microbiome and host during health disease, we analyzed microbial composition, temporal dynamics, associations with multi-omics, immune, clinical markers of microbiomes from four body sites in 86 participants over 6 years. We found that stability individuality are body-site specific heavily influenced by host. The stool oral more stable than skin nasal microbiomes, possibly due to their interaction environment. identify individual-specific commonly shared bacterial taxa, individualized taxa showing greater stability. Interestingly, dynamics correlate across sites, suggesting systemic host-microbial-environment interactions. Notably, insulin-resistant individuals show altered among microbiome, molecular markers, features, disrupted metabolic disease. Our study offers comprehensive views multi-site relationship

Language: Английский

Citations

55

Microneedles for Enhanced Topical Treatment of Skin Disorders: Applications, Challenges, and Prospects DOI Creative Commons
Tingting Peng, Yangyan Chen, Wanshan Hu

et al.

Engineering, Journal Year: 2023, Volume and Issue: unknown

Published: June 1, 2023

Microneedles (MNs) can be used for the topical treatment of skin disorders as they directly deliver therapeutics to site lesions, resulting in increased therapeutic efficacy while having minimum side effects. MNs are different kinds (e.g., small molecules, macromolecules, nanomedicines, living cells, bacteria, and exosomes) treating various disorders, including superficial tumors, wounds, infections, inflammatory diseases, abnormal appearance. The improved by integrating advantages multiple perform combination therapy. Through careful designing, further modified with biomimetic structures responsive drug release from internal external stimuli enhance transdermal delivery efficiency robust outcomes. Some studies have proposed use drug-free a promising mechanotherapeutic strategy promote wound healing, scar removal, hair regeneration via mechanical communication pathway. Although several advantages, practical application suffers problems related industrial manufacture clinical evaluation, making it difficult translation. In this study, we summarized applications, emerging challenges, developmental prospects provide information on ways advance

Language: Английский

Citations

48

Self‐Sterilizing Microneedle Sensing Patches for Machine Learning‐Enabled Wound pH Visual Monitoring DOI
Jingyu Xiao,

Zhongzeng Zhou,

Geng Zhong

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(22)

Published: Feb. 1, 2024

Abstract The skin, as the body's largest organ, is closely linked to an individual's health. Delayed diagnosis and treatment of skin infections can lead complications such non‐healing wounds sepsis. Despite significant, early identification wound timely remain a challenge that requires continuous management. This work presents novel strategy combines smart microneedle sensing inhibit infection track healing status. tip based on metal‐organic frameworks (MOF) hydrogel allows rapid self‐sterilization promotes healing. substrate patch pH–sensitive fluorescent reagents, integrate with smartphone visualize images. Furthermore, it be further reliably evaluated pH by applying machine‐learning algorithm. multifunctional establishes therapy address delayed management, design optimization MOF hydrogels, contributes facile way for disease personalized health

Language: Английский

Citations

48

Colonizing microbiota is associated with clinical outcomes in diabetic wound healing DOI Creative Commons
Gaofeng Wang, Zhen Lin, Yue Li

et al.

Advanced Drug Delivery Reviews, Journal Year: 2023, Volume and Issue: 194, P. 114727 - 114727

Published: Feb. 8, 2023

Language: Английский

Citations

46