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He X, Liu J, Gong Y, Lu W, Sha X, Cao C, Li Y, Wang J. Amygdalin ameliorates alopecia areata on C3H/HeJ mice by inhibiting inflammation through JAK2/STAT3 pathway. JOURNAL OF ETHNOPHARMACOLOGY 2024; 331:118317. [PMID: 38723918 DOI: 10.1016/j.jep.2024.118317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 04/30/2024] [Accepted: 05/07/2024] [Indexed: 05/16/2024]
Abstract
BACKGROUND Evidence has demonstrated that Chinese medicine formula Xuefu Zhuyu decoction can markedly promote the formation of new hair in patients and mice with alopecia areata (AA). Amygdalin is one of the active components of Xuefu Zhuyu decoction, but its therapeutic effects and the underlying mechanisms on AA remains largely unrevealed. PURPOSE Therefore, this study aims to investigate the therapeutic effects and to probe its molecular mechanisms of inflammation and immune regulation on AA model of C3H/HeJ mice. STUDY DESIGN The C3H/HeJ female mice were divided into control, AA, rusolitinib (60 mg/kg), and amygdalin groups (60, 90, and 120 mg/kg, 0.2 ml/10 g, i.g.). METHODS The optical microscope was used to observe the feature of the local skin, and the number of lanugo and terminal hair. H&E staining was performed to determine the degree of pathological damage to the skin. ELISA was performed to detect levels of interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α) and interferon-γ (IFN-γ) in mice serum. Flow cytometry was carried out to analyze the CD4+CD25+FOXP3+, CD4+ and CD8+ of skin tissue. And the levels of CD4+ and CD8+, p-JAK/JAK2, p-STAT3/STAT, and SOCS3 were detected by immunohistochemistry. Western blot and qRT-PCR were employed to examine the expression levels of IL-6, TNF-α, IFN-γ, JAK2, p-JAK, STAT, p-STAT3 and SOCS3 proteins and genes in skin tissues. RESULTS Compared with AA group, amygdalin immensely increased the number of vellus hairs and decreased the number of terminal hairs determined by skin microscopy and H&E staining. ELISA, Western blot and qRT-PCR data showed that the levels of IL-6, TNF-α and IFN-γ in serum and skin tissues of AA mice were significantly increased, while amygdalin administration dramatically restrained the contents of the three pro-inflammatory factors. Flow cytometry and immunohistochemistry hinted that amygdalin observably enhanced the number of CD4+CD25+FOXP3+ and CD4+ cells, while inhibited the number of CD8+ positive cells in mice with AA. Moreover, amygdalin signally reduced JAK2/STAT3 pathway-related protein and gene levels in AA mice. CONCLUSION Amygdalin could inhibit inflammatory response and improve immune function in the treatment of AA. The underlying molecular mechanism may be related to inhibition of JAK2/STAT3 pathway.
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Affiliation(s)
- Xun He
- Department of Dermatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610071, China.
| | - Jingsong Liu
- Neurosurgery, Institute of Sichuan Cancer Hospital, Chengdu, 610041, China
| | - Yugang Gong
- Department of Dermatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610071, China
| | - Wei Lu
- Department of Dermatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610071, China
| | - Xiaowei Sha
- Department of Dermatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610071, China
| | - Chang Cao
- Department of Dermatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610071, China
| | - Yanqun Li
- Department of Dermatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610071, China
| | - Jiawei Wang
- Department of Dermatology, The Affiliated Hospital, Southwest Medical University, Luzhou, 646000, China
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Joo JH, Kim J, Shin JY, Choi YH, Jun SH, Kang NG. An in vivo approach for revealing physiological properties of human scalp microbiome. J Cosmet Dermatol 2024. [PMID: 39166648 DOI: 10.1111/jocd.16524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2024] [Revised: 07/31/2024] [Accepted: 08/02/2024] [Indexed: 08/23/2024]
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Gan Y, Zhang J, Qi F, Hu Z, Sweren E, Reddy SK, Chen L, Feng X, Grice EA, Garza LA, Wang G. Commensal microbe regulation of skin cells in disease. Cell Host Microbe 2024; 32:1264-1279. [PMID: 39146798 DOI: 10.1016/j.chom.2024.07.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Revised: 07/18/2024] [Accepted: 07/19/2024] [Indexed: 08/17/2024]
Abstract
Human skin is the host to various commensal microbes that constitute a substantial microbial community. The reciprocal communication between these microbial inhabitants and host cells upholds both the morphological and functional attributes of the skin layers, contributing indispensably to microenvironmental and tissue homeostasis. Thus, disruption of the skin barrier or imbalances in the microbial communities can exert profound effects on the behavior of host cells. This influence, mediated by the microbes themselves or their metabolites, manifests in diverse outcomes. In this review, we examine existing knowledge to provide insight into the nuanced behavior exhibited by the microbiota on skin cells in health and disease states. These interactions provide insight into potential cellular targets for future microbiota-based therapies to prevent and treat skin disease.
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Affiliation(s)
- Yuyang Gan
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China
| | - Jiarui Zhang
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China
| | - Fangfang Qi
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China
| | - Zhiqi Hu
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China
| | - Evan Sweren
- University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Sashank K Reddy
- Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, MD 21210, USA; Department of Plastic and Reconstructive Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
| | - Lu Chen
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China
| | - Xinyi Feng
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China
| | - Elizabeth A Grice
- Department of Dermatology and Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Luis A Garza
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China; Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD 21210, USA; Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21210, USA.
| | - Gaofeng Wang
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China; Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, MD 21210, USA.
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Zhang J, Zhao Y, Zhang J, Zhou Y, Yi Y, Lei R, Qu Q, Hu Z, Gao Z, Li Y, Tang Q, Miao Y. Risk Factors and Hazards of Recipient-Area Perifollicular Erythema After Hair Transplantation: A Multicenter Retrospective Cohort Study. Aesthetic Plast Surg 2024; 48:2771-2777. [PMID: 38849551 DOI: 10.1007/s00266-024-04166-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Accepted: 05/24/2024] [Indexed: 06/09/2024]
Abstract
BACKGROUND Recipient-area perifollicular erythema (RPE) may delay graft growth after hair transplantation. However, there is currently a lack of observational clinical studies of RPE. OBJECTIVE To study the clinical features and risk factors associated with RPE while analyzing its correlation with graft growth. METHODS We conducted a multicenter retrospective cohort study between June 2020 and January 2023. RESULTS A total of 1090 participants were included, 178 (16.33%) showed mild RPE, 56 (5.14%) showed moderate RPE, and 10 (0.92%) showed severe RPE. Patients with RPE had severe hair shaft shedding (P < 0.001) and a lower survival rate (P < 0.001) of grafts. Logistic regression analysis showed that folliculitis is a significant risk factor for mild RPE (OR 6.061, 95% CI 3.343-10.991, P < 0.001) and moderate RPE (OR 3.397, 95% CI 1.299-8.882, P = 0.013). Besides, untimely first postoperative hair washing was associated with the development of moderate RPE (OR 0.724, 95% CI 0.553-0.947, P = 0.018) and severe RPE (OR 1.553, 95% CI 1.156-2.086, P = 0.003). CONCLUSION RPE is a postoperative complication closely related to high hair shaft shedding proportion and low graft survival rate. Both postoperative folliculitis and untimely first postoperative hair washing may induce the occurrence of RPE. LEVEL OF EVIDENCE III This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
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Affiliation(s)
- Jiaxian Zhang
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yingjie Zhao
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Jiarui Zhang
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yi Zhou
- Center for Plastic and Reconstructive Surgery, Department of Plastic and Reconstructive Surgery, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, 314408, China
| | - Yanhua Yi
- Department of Burn, Would Repair Surgery and Plastic Surgery, Department of Aesthetic Surgery, Affiliated Hospital of Guilin Medical University, Guilin, 541001, China
| | - Rui Lei
- Department of Plastic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, China
| | - Qian Qu
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Zhiqi Hu
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Zhiyong Gao
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yufei Li
- Department of Plastic Surgery, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, 200120, China.
| | - Qiang Tang
- Surgery Department of Burn Plastics and Wound Repair, Affiliated Hospital of Youjang Medical University for Nationalities, Baise City, 533000, Guangxi, China.
| | - Yong Miao
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
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Shah RR, Larrondo J, Dawson T, Mcmichael A. Scalp microbiome: a guide to better understanding scalp diseases and treatments. Arch Dermatol Res 2024; 316:495. [PMID: 39073596 DOI: 10.1007/s00403-024-03235-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 06/19/2024] [Accepted: 07/16/2024] [Indexed: 07/30/2024]
Abstract
The scalp microbiome represents an array of microorganisms important in maintaining scalp homeostasis and mediating inflammation. Scalp microbial dysregulation has been implicated in dermatologic conditions including alopecia areata (AA), dandruff/seborrheic dermatitis (D/SD), scalp psoriasis (SP) and folliculitis decalvans (FD). Understanding the impact of scalp microbial dysbiosis gives insight on disease pathophysiology and guides therapeutic decision making. Herein we review the scalp microbiome and its functional role in scalp conditions by analysis of metagenomic medical literature in alopecia, D/SD, SP, and other dermatologic disease.Increased abundance of Malassezia, Staphylococcus, and Brevibacterium was associated with SD compared to healthy controls. A higher proportion of Corynebacterium, actinobacteria, and firmicutes are present in AA patients, and lower proportions of Staphylococcus caprae are associated with worse clinical outcomes. Decreased prevalence of actinobacteria and Propionibacterium and increased firmicutes, staphylococcus, and streptococcus are associated with scalp psoriasis. Studies of central centrifugal cicatricial alopecia (CCCA) suggest scalp microbial composition contributes to CCCA's pro-inflammatory status. The most common organisms associated with FD include methicillin-resistant S. aureus and S. lugdunensis. Antifungals have been a mainstay treatment for these diseases, while other alternatives including coconut oils and shampoos with heat-killed probiotics have shown considerable potential efficacy by replenishing the scalp microbiome.
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Affiliation(s)
- Rohan R Shah
- Rutgers New Jersey Medical School, Newark, NJ, USA.
- Penn State Hershey Department of Dermatology, Hershey, PA, USA.
| | - Jorge Larrondo
- Department of Dermatology, Clínica Alemana-Universidad del Desarrollo, Santiago, Chile
| | - Thomas Dawson
- A*STAR Skin Research Labs (A*SRL), Agency for Science, Technology and Research (A*STAR) & Skin Research Institute of Singapore (SRIS), 11 Mandalay Rd, #17-01, Singapore, 308232, Republic of Singapore
| | - Amy Mcmichael
- Wake Forest School of Medicine Department of Dermatology, Winston-Salem, NC, USA
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Lousada MB, Edelkamp J, Lachnit T, Fehrholz M, Pastar I, Jimenez F, Erdmann H, Bosch TCG, Paus R. Spatial Distribution and Functional Impact of Human Scalp Hair Follicle Microbiota. J Invest Dermatol 2024; 144:1353-1367.e15. [PMID: 38070726 DOI: 10.1016/j.jid.2023.11.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 10/17/2023] [Accepted: 11/01/2023] [Indexed: 02/26/2024]
Abstract
Human hair follicles (HFs) constitute a unique microbiota habitat that differs substantially from the skin surface. Traditional HF sampling methods fail to eliminate skin microbiota contaminants or assess the HF microbiota incompletely, and microbiota functions in human HF physiology remain ill explored. Therefore, we used laser-capture microdissection, metagenomic shotgun sequencing, and FISH to characterize the human scalp HF microbiota in defined anatomical compartments. This revealed significant compartment-, tissue lineage-, and donor age-dependent variations in microbiota composition. Greatest abundance variations between HF compartments were observed for viruses, archaea, Staphylococcus epidermidis, Cutibacterium acnes, and Malassezia restricta, with the latter 2 being the most abundant viable HF colonizers (as tested by propidium monoazide assay) and, surprisingly, most abundant in the HF mesenchyme. Transfection of organ-cultured human scalp HFs with S. epidermidis-specific lytic bacteriophages ex vivo downregulated transcription of genes known to regulate HF growth and development, metabolism, and melanogenesis, suggesting that selected microbial products may modulate HF functions. Indeed, HF treatment with butyrate, a metabolite of S. epidermidis and other HF microbiota, delayed catagen and promoted autophagy, mitochondrial activity, and gp100 and dermcidin expression ex vivo. Thus, human HF microbiota show spatial variations in abundance and modulate the physiology of their host, which invites therapeutic targeting.
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Affiliation(s)
- Marta B Lousada
- Monasterium Laboratory, Münster, Germany; Zoological Institute, Christian Albrechts University in Kiel, Kiel, Germany
| | | | - Tim Lachnit
- Zoological Institute, Christian Albrechts University in Kiel, Kiel, Germany
| | | | - Irena Pastar
- Dr Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Francisco Jimenez
- Mediteknia Skin & Hair Lab, Las Palmas de Gran Canaria, Spain; Ciencias de la Salud, Universidad Fernando Pessoa Canarias, Las Palmas de Gran Canaria, Spain
| | | | - Thomas C G Bosch
- Zoological Institute, Christian Albrechts University in Kiel, Kiel, Germany
| | - Ralf Paus
- Monasterium Laboratory, Münster, Germany; Dr Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA; CUTANEON, Hamburg, Germany.
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7
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Sun R, Kong D. Bilateral Association Between Atopic Dermatitis® and Alopecia Areata: A Systematic Review and Meta-Analysis. Dermatitis 2024; 35:208-218. [PMID: 37471232 DOI: 10.1089/derm.2023.0114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
Abstract
This systematic review and meta-analysis aimed to explore the association between atopic Dermatitis® (AD) and alopecia areata (AA). A comprehensive search was conducted in PubMed, Embase, Cochrane, and Web of Science from the inception of each database to November 10, 2022 for relevant studies. As there is a potential bilateral association between the 2 diseases, we assessed the prevalence/incidence of AA in patients with AD and the prevalence/incidence of AD in patients with AA. A total of 29 studies involving 11,233,448 participants were included in this analysis. AA was the exposure factor in 23 studies, AD in 7 studies, and both in 1 study. The meta-analysis revealed that the prevalence of AD was 11.2% (7.7%-15.1%) in patients with AA, and the prevalence of AA was 3.2% (95% confidence interval [CI]: 0.0%-11.5%) in patients with AD. The incidence of AD in AA patients was found to vary with age (P = 0.07). Based on 7 studies, there was a significant association between AD and AA when AA was the exposure factor [odds ratio, OR, = 4.537 (95% CI: 2.409-8.544)]; based on 10 studies, there was also a significant association between AD and AA when AD was the exposure factor [OR = 2.643 (95% CI: 1.737-3.995)]. In conclusion, this meta-analysis demonstrated the 2-way association between AD and AA, providing a clinical reference for disease prevention and control.
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Affiliation(s)
- Rong Sun
- From the The First Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, China
| | - Deqi Kong
- Epidemic Prevention Department, Center for Disease Control and Prevention of Wuzhong District, Suzhou, China
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Hashem MM, Attia D, Hashem YA, Hendy MS, AbdelBasset S, Adel F, Salama MM. Rosemary and neem: an insight into their combined anti-dandruff and anti-hair loss efficacy. Sci Rep 2024; 14:7780. [PMID: 38565924 PMCID: PMC10987638 DOI: 10.1038/s41598-024-57838-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 03/22/2024] [Indexed: 04/04/2024] Open
Abstract
Dandruff, a common scalp disorder characterized by flaking dead skin, is often treated with conventional topical products. However, limitations exist due to potential side effects and high costs. Therefore, searching for natural, cost-effective solutions for dandruff and hair loss is crucial. Rosemary herb and neem tree, both cultivated in Egypt, possess well-documented anti-inflammatory properties derived from their rich phenolic phytoconstituents. This study formulated a standardized combined extract of rosemary and neem (RN-E 2:1) into hair gel and leave-in tonic formats. This extract demonstrated superior efficacy against Malassezia furfur (a causative agent of dandruff) and Trichophyton rubrum (associated with scalp disorders) compared to the conventional antifungal agent, ketoconazole. The combined extract (RN-E 2:1) also exhibited potent anti-inflammatory activity. Additionally, the suppression of iNOS expression is considered concentration-dependent. Quality control verified formulation stability, and ex-vivo studies confirmed effective ingredient penetration into the epidermis, the primary site of fungal presence. Remarkably, both formulations outperformed the standard treatment, minoxidil in hair growth trials. These findings highlight the potential of natural extracts for scalp and hair health.
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Affiliation(s)
- Mona M Hashem
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, 11562, Egypt.
| | - Dalia Attia
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, The British University in Egypt, Suez Desert Road, El Sherouk City, Cairo, 11837, Egypt
| | - Yomna A Hashem
- Department of Microbiology, Faculty of Pharmacy, The British University in Egypt, Suez Desert Road, El Sherouk City, Cairo, 11837, Egypt
| | - Moataz S Hendy
- Department of Pharmaceutical Chemistry, The British University in Egypt, Suez Desert Road, El Sherouk City, Cairo, 11837, Egypt
- Health Research Centre of Excellence, Drug Research and Development, The British University in Egypt, Suez Desert Road, El Sherouk City, Cairo, 11837, Egypt
| | - Safa AbdelBasset
- Department of Pharmacognosy, Faculty of Pharmacy, The British University in Egypt, Suez Desert Road, El Sherouk City, Cairo, 11837, Egypt
| | - Farah Adel
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, The British University in Egypt, Suez Desert Road, El Sherouk City, Cairo, 11837, Egypt
| | - Maha M Salama
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, 11562, Egypt
- Department of Pharmacognosy, Faculty of Pharmacy, The British University in Egypt, Suez Desert Road, El Sherouk City, Cairo, 11837, Egypt
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9
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Zhang Q, Wang Y, Ran C, Zhou Y, Zhao Z, Xu T, Hou H, Lu Y. Characterization of distinct microbiota associated with androgenetic alopecia patients treated and untreated with platelet-rich plasma (PRP). Animal Model Exp Med 2024; 7:106-113. [PMID: 38720238 PMCID: PMC11079158 DOI: 10.1002/ame2.12414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 01/10/2024] [Indexed: 05/12/2024] Open
Abstract
BACKGROUND Androgenic alopecia (AGA) is the most common type of hair loss in men, and there are many studies on the treatment of hair loss by platelet-rich plasma (PRP). The human scalp contains a huge microbiome, but its role in the process of hair loss remains unclear, and the relationship between PRP and the microbiome needs further study. Therefore, the purpose of this study was to investigate the effect of PRP treatment on scalp microbiota composition. METHODS We performed PRP treatment on 14 patients with AGA, observed their clinical efficacy, and collected scalp swab samples before and after treatment. The scalp microflora of AGA patients before and after treatment was characterized by amplifying the V3-V4 region of the 16 s RNA gene and sequencing for bacterial identification. RESULTS The results showed that PRP was effective in the treatment of AGA patients, and the hair growth increased significantly. The results of relative abundance analysis of microbiota showed that after treatment, g_Cutibacterium increased and g_Staphylococcus decreased, which played a stable role in scalp microbiota. In addition, g_Lawsonella decreased, indicating that the scalp oil production decreased after treatment. CONCLUSIONS The findings suggest that PRP may play a role in treating AGA through scalp microbiome rebalancing.
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Affiliation(s)
- Qian Zhang
- Beijing Life Science AcademyBeijingChina
| | - Yanan Wang
- Department of PathologyAffiliated Hospital of Hebei UniversityBaodingChina
| | - Cheng Ran
- Department of OtolaryngologyAffiliated Hospital of Hebei UniversityBaodingChina
| | - Yingmei Zhou
- Department of DermatologyHuazhong University of Science and Technology Union Shenzhen HospitalShenzhenChina
| | - Zigang Zhao
- Department of DermatologyHainan Hospital of PLA General HospitalSanyaChina
| | - Tianhua Xu
- Department of OtolaryngologyAffiliated Hospital of Hebei UniversityBaodingChina
| | - Hongwei Hou
- Beijing Life Science AcademyBeijingChina
- Department of Chemical EngineeringTsinghua UniversityBeijingChina
| | - Yuan Lu
- Department of DermatologyHuazhong University of Science and Technology Union Shenzhen HospitalShenzhenChina
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10
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Jacksch S, Weis S, März M, Gruedl S, Simmering R, Welss T, Egert M. Effect of two shampoo formulations on the prokaryotic and eukaryotic microbiota composition of the human scalp. Int J Cosmet Sci 2024; 46:62-70. [PMID: 37664975 DOI: 10.1111/ics.12895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 08/22/2023] [Indexed: 09/05/2023]
Abstract
OBJECTIVE The human scalp is characterized by a moderately diverse microbial community, comprising prokaryotic (bacteria) and eukaryotic (fungi) members. Although the details are far from being fully understood, the human scalp microbiota is implicated in several scalp disorders, in particular dandruff formation. Hence, the protection of an intact and diverse scalp microbiota can be regarded as a quality criterion for hair and scalp care formulations. In this study, we investigated the influence of two commercially available, non-antimicrobial shampoo formulations on the structure of the scalp microbiota. METHODS Scalp microbiota samples, obtained by swab sampling from two cohorts of probands (n = 25, each), were analysed before and after daily use of two different shampoo formulations for 2 weeks, respectively. A polyphasic approach was used, comprising quantitative cultivation of bacteria and fungi on selective media as well as sequencing of PCR-amplified 16S rRNA and 18S rRNA genes, respectively. RESULTS All analyses revealed a microbiota composition typical for the human scalp. While in particular fungal germ numbers increased significantly during the treatments, overall bacterial and fungal community composition was not affected, based on alpha- and beta-diversity measures. However, we observed an increase in structural bacterial diversity with the age of the probands. CONCLUSIONS Over an application period of 2 weeks, the investigated shampoo induced quantitative but no qualitative changes in the scalp microbial community structure of the investigated probands, suggesting no adverse but rather preserving or even stimulating effects of the underlying formulations on the scalp microbiota. Further investigation will have to clarify if this is also true for longer application periods and if the formulations might affect community functionality, for example microbial gene expression, rather than community composition.
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Affiliation(s)
- Susanne Jacksch
- Faculty of Medical and Life Sciences, Institute of Precision Medicine, Microbiology and Hygiene Group, Furtwangen University, Villingen-Schwenningen, Germany
| | - Severin Weis
- Faculty of Medical and Life Sciences, Institute of Precision Medicine, Microbiology and Hygiene Group, Furtwangen University, Villingen-Schwenningen, Germany
| | - Melanie März
- Faculty of Medical and Life Sciences, Institute of Precision Medicine, Microbiology and Hygiene Group, Furtwangen University, Villingen-Schwenningen, Germany
| | - Sabine Gruedl
- International R&D Henkel Consumer Brands, Henkel AG & Co KGaA, Düsseldorf, Germany
| | - Rainer Simmering
- Department of Microbiology, Corporate Scientific Services, Henkel AG & Co KGaA, Düsseldorf, Germany
| | - Thomas Welss
- International R&D Henkel Consumer Brands, Henkel AG & Co KGaA, Düsseldorf, Germany
| | - Markus Egert
- Faculty of Medical and Life Sciences, Institute of Precision Medicine, Microbiology and Hygiene Group, Furtwangen University, Villingen-Schwenningen, Germany
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11
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Liang A, Fang Y, Ye L, Meng J, Wang X, Chen J, Xu X. Signaling pathways in hair aging. Front Cell Dev Biol 2023; 11:1278278. [PMID: 38033857 PMCID: PMC10687558 DOI: 10.3389/fcell.2023.1278278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 11/06/2023] [Indexed: 12/02/2023] Open
Abstract
Hair follicle (HF) homeostasis is regulated by various signaling pathways. Disruption of such homeostasis leads to HF disorders, such as alopecia, pigment loss, and hair aging, which is causing severe health problems and aesthetic concerns. Among these disorders, hair aging is characterized by hair graying, hair loss, hair follicle miniaturization (HFM), and structural changes to the hair shaft. Hair aging occurs under physiological conditions, while premature hair aging is often associated with certain pathological conditions. Numerous investigations have been made to determine the mechanisms and explore treatments to prevent hair aging. The most well-known hypotheses about hair aging include oxidative stress, hormonal disorders, inflammation, as well as DNA damage and repair defects. Ultimately, these factors pose threats to HF cells, especially stem cells such as hair follicle stem cells, melanocyte stem cells, and mesenchymal stem cells, which hamper hair regeneration and pigmentation. Here, we summarize previous studies investigating the above mechanisms and the existing therapeutic methods for hair aging. We also provide insights into hair aging research and discuss the limitations and outlook.
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Affiliation(s)
- Aishi Liang
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-Sen University, Shenzhen, Guangdong, China
| | - Yingshan Fang
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-Sen University, Shenzhen, Guangdong, China
| | - Lan Ye
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-Sen University, Shenzhen, Guangdong, China
| | - Jianda Meng
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-Sen University, Shenzhen, Guangdong, China
| | - Xusheng Wang
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-Sen University, Shenzhen, Guangdong, China
| | - Jinsong Chen
- Endocrinology Department, First People’s Hospital of Foshan, Foshan, China
| | - Xuejuan Xu
- Endocrinology Department, First People’s Hospital of Foshan, Foshan, China
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12
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Rinaldi F, Trink A, Mondadori G, Giuliani G, Pinto D. The Menopausal Transition: Is the Hair Follicle "Going through Menopause"? Biomedicines 2023; 11:3041. [PMID: 38002043 PMCID: PMC10669803 DOI: 10.3390/biomedicines11113041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 11/02/2023] [Accepted: 11/09/2023] [Indexed: 11/26/2023] Open
Abstract
This article explores the link between menopause and changes in the hair follicle (HF) lifecycle, focusing on hormonal and metabolic dynamics. During menopause, hormonal fluctuations and aging can impact the HF, leading to phenomena such as thinning, loss of volume, and changes in hair texture. These changes are primarily attributed to a decrease in estrogen levels. However, not all women experience significant hair changes during menopause, and the extent of transformations can vary considerably from person to person, influenced by genetic factors, stress, diet, and other elements. Furthermore, menopause mirrors the aging process, affecting metabolism and blood flow to the HFs, influencing the availability of vital nutrients. The article also discusses the key role of energy metabolism in the HF lifecycle and the effect of hormones, particularly estrogens, on metabolic efficiency. The concept of a possible "menopause" clinically independent of menopause is introduced, related to changes in HF metabolism, emphasizing the importance of individual factors such as estrogen receptor responses, genetics, and last but not least, the microbiota in determining these dynamics.
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Affiliation(s)
| | | | | | | | - Daniela Pinto
- HMAP, Human Microbiome Advanced Project, 20129 Milan, Italy; (F.R.); (A.T.); (G.M.); (G.G.)
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13
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Sumathy B, Velayudhan S. Fabrication and evaluation of a bi-layered gelatin based scaffold with arrayed micro-pits for full-thickness skin construct. Int J Biol Macromol 2023; 251:126360. [PMID: 37591428 DOI: 10.1016/j.ijbiomac.2023.126360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 05/17/2023] [Accepted: 08/14/2023] [Indexed: 08/19/2023]
Abstract
There is an unmet need for a reliable and reproducible method for incorporating hair follicle derived stem cells in tissue engineered skin models to reconstitute hair follicles. This study discloses a novel method for introducing hair follicle derived stem cells in microneedle embossed micro-pits of a bilayer skin equivalent fabricated from a gelatin based scaffold. The microneedles are hard and strong enough to penetrate the upper layer of the bilayer gelatin based scaffold that corresponds to the epidermis and permeates down to lower layer that corresponds to dermal layer. This strategic location will mimic the natural niche of hair follicle stem cells for picking up signals from both the epidermis and dermis. Hair follicle stem cells are trapped in to these micro-pits by vacuum assisted cell seeding. The bilayer system consists of two distinct electrospun layers in a single processing step, representing outer epidermal layer and inner dermal layer with hair follicle stem cells in embedded pits, resulting in the formation of a closed representation of a complete skin.
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Affiliation(s)
- Babitha Sumathy
- Department of Tissue Engineering and Regeneration Technologies, Department of Applied Biology, Biomedical Technology wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum 695 012, India.
| | - Shiny Velayudhan
- Division of Dental Products, Department of Biomaterials Science and Technology, Biomedical Technology wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum 695 012, India.
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14
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Pereira MN, Nogueira LL, Cunha-Filho M, Gratieri T, Gelfuso GM. Methodologies to Evaluate the Hair Follicle-Targeted Drug Delivery Provided by Nanoparticles. Pharmaceutics 2023; 15:2002. [PMID: 37514188 PMCID: PMC10383440 DOI: 10.3390/pharmaceutics15072002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 07/16/2023] [Accepted: 07/20/2023] [Indexed: 07/30/2023] Open
Abstract
Nanotechnology has been investigated for treatments of hair follicle disorders mainly because of the natural accumulation of solid nanoparticles in the follicular openings following a topical application, which provides a drug "targeting effect". Despite the promising results regarding the therapeutic efficacy of topically applied nanoparticles, the literature has often presented controversial results regarding the targeting of hair follicle potential of nanoformulations. A closer look at the published works shows that study parameters such as the type of skin model, skin sections analyzed, employed controls, or even the extraction methodologies differ to a great extent among the studies, producing either unreliable results or precluding comparisons altogether. Hence, the present study proposes to review different skin models and methods for quantitative and qualitative analysis of follicular penetration of nano-entrapped drugs and their influence on the obtained results, as a way of providing more coherent study protocols for the intended application.
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Affiliation(s)
- Maíra N Pereira
- Laboratory of Food, Drug, and Cosmetics (LTMAC), School of Health Sciences, University of Brasilia, Brasilia 70910-900, DF, Brazil
| | - Luma L Nogueira
- Laboratory of Food, Drug, and Cosmetics (LTMAC), School of Health Sciences, University of Brasilia, Brasilia 70910-900, DF, Brazil
| | - Marcilio Cunha-Filho
- Laboratory of Food, Drug, and Cosmetics (LTMAC), School of Health Sciences, University of Brasilia, Brasilia 70910-900, DF, Brazil
| | - Tais Gratieri
- Laboratory of Food, Drug, and Cosmetics (LTMAC), School of Health Sciences, University of Brasilia, Brasilia 70910-900, DF, Brazil
| | - Guilherme M Gelfuso
- Laboratory of Food, Drug, and Cosmetics (LTMAC), School of Health Sciences, University of Brasilia, Brasilia 70910-900, DF, Brazil
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15
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Leroy AK, Cortez de Almeida RF, Obadia DL, Frattini S, Melo DF. Scalp Seborrheic Dermatitis: What We Know So Far. Skin Appendage Disord 2023; 9:160-164. [PMID: 37325288 PMCID: PMC10264915 DOI: 10.1159/000529854] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 02/13/2023] [Indexed: 06/04/2024] Open
Abstract
Scalp seborrheic dermatitis (SSD) is a prevalent chronic, relapsing inflammatory skin disease. The etiology is related to sebum production, bacterial proliferation - Staphylococcus sp., Streptococcus, and M. restricta - and host immunity factors - NK1+, CD16+ cells, IL-1, and IL-8. Trichoscopy features include mostly arborizing vessels and yellowish scales. New trichoscopic findings were described to guide the diagnosis as dandelion vascular conglomerate, "cherry blossom" vascular pattern, and intrafollicular oily material. Antifungals and corticosteroids constitute the essential therapy, but new treatments have been described. This article aims to review and discuss the etiology, pathophysiology, trichoscopy, histopathologic findings, main differential diagnoses, and therapeutic options of SSD.
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Affiliation(s)
- Anne Kelly Leroy
- Department of Dermatology, Rio de Janeiro State University (UERJ), Rio de Janeiro, Brazil
| | | | - Daniel Lago Obadia
- Department of Dermatology, Rio de Janeiro State University (UERJ), Rio de Janeiro, Brazil
| | - Sidney Frattini
- The Mole Clinic, Private Practice, Ancaster, Ontario, Canada
| | - Daniel Fernandes Melo
- Department of Dermatology, Rio de Janeiro State University (UERJ), Rio de Janeiro, Brazil
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16
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Tsai WH, Fang YT, Huang TY, Chiang YJ, Lin CG, Chang WW. Heat-killed Lacticaseibacillus paracasei GMNL-653 ameliorates human scalp health by regulating scalp microbiome. BMC Microbiol 2023; 23:121. [PMID: 37120517 PMCID: PMC10148562 DOI: 10.1186/s12866-023-02870-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 04/24/2023] [Indexed: 05/01/2023] Open
Abstract
BACKGROUND The equilibrium of the scalp microbiome is important for maintaining healthy scalp conditions, including sebum secretion, dandruff, and hair growth. Many different strategies to improve scalp health have been reported; however, the effect of postbiotics, such as heat-killed probiotics, on scalp health remains unclear. We examined the beneficial effects of heat-killed probiotics consisting of Lacticaseibacillus paracasei, GMNL-653, on scalp health. RESULTS Heat-killed GMNL-653 could co-aggregate with scalp commensal fungi, Malassezia furfur, in vitro, and the GMNL-653-derived lipoteichoic acid inhibited the biofilm formation of M. furfur on Hs68 fibroblast cells. The mRNA of hair follicle growth factors, including insulin-like growth factor-1 receptor (IGF-1R), vascular endothelial growth factor, IGF-1, and keratinocyte growth factor was up-regulated in skin-related human cell lines Hs68 and HaCaT after treatment with heat-killed GMNL-653. For clinical observations, we recruited 22 volunteer participants to use the shampoo containing the heat-killed GMNL-653 for 5 months and subsequently measured their scalp conditions, including sebum secretion, dandruff formation, and hair growth. We applied polymerase chain reaction (PCR) to detect the scalp microbiota of M. restricta, M. globosa, Cutibacterium acnes, and Staphylococcus epidermidis. A decrease in dandruff and oil secretion and an increase in hair growth in the human scalp were observed after the use of heat-killed GMNL-653-containing shampoo. The increased abundance of M. globosa and the decreased abundance of M. restricta and C. acnes were also observed. We further found that accumulated L. paracasei abundance was positively correlated with M. globosa abundance and negatively correlated with C. acnes abundance. S. epidermidis and C. acnes abundance was negatively correlated with M. globosa abundance and positively correlated with M. restricta. Meanwhile, M. globosa and M. restricta abundances were negatively associated with each other. C. acnes and S. epidermidis abundances were statistically positively correlated with sebum secretion and dandruff, respectively, in our shampoo clinical trial. CONCLUSION Our study provides a new strategy for human scalp health care using the heat-killed probiotics GMNL-653-containing shampoo. The mechanism may be correlated with the microbiota shift.
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Affiliation(s)
- Wen-Hua Tsai
- Research and Development Department, GenMont Biotech Incorporation, Tainan, Taiwan
| | - Yi-Ting Fang
- Research and Development Department, GenMont Biotech Incorporation, Tainan, Taiwan
| | - Tsuei-Yin Huang
- Research and Development Department, GenMont Biotech Incorporation, Tainan, Taiwan
| | - Ying-Ju Chiang
- Research and Development Department, GenMont Biotech Incorporation, Tainan, Taiwan
| | - Ching-Gong Lin
- Bachelor Program in Cosmeceutical and Biotech Industry, Department of Cosmetic Science, Chia Nan University of Pharmacy & Science, Tainan, Taiwan
| | - Wen-Wei Chang
- Department of Biomedical Sciences, Chung Shan Medical University, No. 110, Section 1, Chien-Kuo N. Rd, Taichung City, 402306, Taiwan.
- Department of Medical Research, Chung Shan Medical University Hospital, Taichung, Taiwan.
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17
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Lousada MB, Edelkamp J, Lachnit T, Fehrholz M, Jimenez F, Paus R. Laser capture microdissection as a method for investigating the human hair follicle microbiome reveals region-specific differences in the bacteriome profile. BMC Res Notes 2023; 16:29. [PMID: 36879274 PMCID: PMC9987047 DOI: 10.1186/s13104-023-06302-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 02/20/2023] [Indexed: 03/08/2023] Open
Abstract
OBJECTIVE Human hair follicles (HFs) are populated by a rich and diverse microbiome, traditionally evaluated by methods that inadvertently sample the skin microbiome and/or miss microbiota located in deeper HF regions. Thereby, these methods capture the human HF microbiome in a skewed and incomplete manner. This pilot study aimed to use laser-capture microdissection of human scalp HFs, coupled with 16S rRNA gene sequencing to sample the HF microbiome and overcome these methodological limitations. RESULTS HFs were laser-capture microdissected (LCM) into three anatomically distinct regions. All main known core HF bacterial colonisers, including Cutibacterium, Corynebacterium and Staphylococcus, were identified, in all three HF regions. Interestingly, region-specific variations in α-diversity and microbial abundance of the core microbiome genera and Reyranella were identified, suggestive of variations in microbiologically relevant microenvironment characteristics. This pilot study therefore shows that LCM-coupled with metagenomics is a powerful tool for analysing the microbiome of defined biological niches. Refining and complementing this method with broader metagenomic techniques will facilitate the mapping of dysbiotic events associated with HF diseases and targeted therapeutic interventions.
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Affiliation(s)
- Marta B Lousada
- Monasterium Laboratory, Skin&Hair Research, Muenster, Germany. .,Zoological Institute, Christian-Albrechts University Kiel, Kiel, Germany.
| | - J Edelkamp
- Monasterium Laboratory, Skin&Hair Research, Muenster, Germany
| | - T Lachnit
- Zoological Institute, Christian-Albrechts University Kiel, Kiel, Germany
| | - M Fehrholz
- Monasterium Laboratory, Skin&Hair Research, Muenster, Germany
| | - F Jimenez
- Mediteknia Skin & Hair Lab, Las Palmas de Gran Canaria, Spain.,Medical Pathology Group, IUIBS, Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain
| | - R Paus
- Monasterium Laboratory, Skin&Hair Research, Muenster, Germany.,Dr Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.,CUTANEON Skin & Hair Innovations, Hamburg, Germany
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18
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Microbiota, Oxidative Stress, and Skin Cancer: An Unexpected Triangle. Antioxidants (Basel) 2023; 12:antiox12030546. [PMID: 36978794 PMCID: PMC10045429 DOI: 10.3390/antiox12030546] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/15/2023] [Accepted: 02/16/2023] [Indexed: 02/24/2023] Open
Abstract
Mounting evidence indicates that the microbiota, the unique combination of micro-organisms residing in a specific environment, plays an essential role in the development of a wide range of human diseases, including skin cancer. Moreover, a persistent imbalance of microbial community, named dysbiosis, can also be associated with oxidative stress, a well-known emerging force involved in the pathogenesis of several human diseases, including cutaneous malignancies. Although their interplay has been somewhat suggested, the connection between microbiota, oxidative stress, and skin cancer is a largely unexplored field. In the present review, we discuss the current knowledge on these topics, suggesting potential therapeutic strategies.
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19
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Sánchez-Pellicer P, Navarro-Moratalla L, Núñez-Delegido E, Agüera-Santos J, Navarro-López V. How Our Microbiome Influences the Pathogenesis of Alopecia Areata. Genes (Basel) 2022; 13:genes13101860. [PMID: 36292745 PMCID: PMC9601531 DOI: 10.3390/genes13101860] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/11/2022] [Accepted: 10/11/2022] [Indexed: 11/04/2022] Open
Abstract
Alopecia areata is a multifactorial autoimmune-based disease with a complex pathogenesis. As in all autoimmune diseases, genetic predisposition is key. The collapse of the immune privilege of the hair follicle leading to scalp loss is a major pathogenic event in alopecia areata. The microbiota considered a bacterial ecosystem located in a specific area of the human body could somehow influence the pathogenesis of alopecia areata, as it occurs in other autoimmune diseases. Moreover, the Next Generation Sequencing of the 16S rRNA bacterial gene and the metagenomic methodology have provided an excellent characterization of the microbiota. The aim of this narrative review is to examine the published literature on the cutaneous and intestinal microbiota in alopecia areata to be able to establish a pathogenic link. In this review, we summarize the influence of the microbiota on the development of alopecia areata. We first introduce the general pathogenic mechanisms that cause alopecia areata to understand the influence that the microbiota may exert and then we summarize the studies that have been carried out on what type of gut and skin microbiota is found in patients with this disease.
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Affiliation(s)
- Pedro Sánchez-Pellicer
- MiBioPath Research Group, Department of Clinical Medicine, Health Sciences Faculty, Catholic University of Murcia, Campus de los Jerónimos 135, 30107 Murcia, Spain
| | - Laura Navarro-Moratalla
- MiBioPath Research Group, Department of Clinical Medicine, Health Sciences Faculty, Catholic University of Murcia, Campus de los Jerónimos 135, 30107 Murcia, Spain
| | - Eva Núñez-Delegido
- MiBioPath Research Group, Department of Clinical Medicine, Health Sciences Faculty, Catholic University of Murcia, Campus de los Jerónimos 135, 30107 Murcia, Spain
| | - Juan Agüera-Santos
- MiBioPath Research Group, Department of Clinical Medicine, Health Sciences Faculty, Catholic University of Murcia, Campus de los Jerónimos 135, 30107 Murcia, Spain
| | - Vicente Navarro-López
- MiBioPath Research Group, Department of Clinical Medicine, Health Sciences Faculty, Catholic University of Murcia, Campus de los Jerónimos 135, 30107 Murcia, Spain
- Infectious Diseases Unit, University Hospital of Vinalopó-Fisabio, Carrer Tonico Sansano Mora 14, 03293 Elche, Spain
- Correspondence:
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20
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The First Evidence of Bacterial Foci in the Hair Part and Dermal Papilla of Scalp Hair Follicles: A Pilot Comparative Study in Alopecia Areata. Int J Mol Sci 2022; 23:ijms231911956. [PMID: 36233254 PMCID: PMC9570265 DOI: 10.3390/ijms231911956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 09/29/2022] [Accepted: 10/06/2022] [Indexed: 11/27/2022] Open
Abstract
The role of the microbiome in hair follicle (HF) growth represents a growing field of research. Here, we studied the bacterial population in the scalp hair follicles of subjects with alopecia areata (AA). Two Healthy and two AA subjects, respectively (20−60 years old), were enrolled and studied regarding the microbial community in the subepidermal scalp compartments by means of a 4-mm biopsy punch. Samples were examined by 16S sequencing, histochemical staining (Gram’s method), and transmission electron microscopy (TEM). Bacterial foci were observed in the AA subjects’ follicles with both the two adopted complementary approaches (electron microscopy and Gram staining). Significant (p < 0.05) differences were also found in the three-layer biopsy samples (p < 0.05) regarding the bacterial population. In particular, in the deep epidermis and dermis levels, a significant (p < 0.05) lower abundance of Firmicutes and a higher abundance of Proteobacteria were found in AA samples compared to the healthy control. Firmicutes also showed a significant (p < 0.05) lower abundance in hypodermis in AA subjects. In addition, Enterobacteriaceae and the genera Streptococcus, Gemella, Porphyromonas, and Granulicatella were relatively more abundant in AA groups at the deep epidermis level. The Staphylococcus and Flavobacterium genera were significantly less abundant in AA samples than in controls in all three-layer biopsy samples (p < 0.05). In contrast, Veillonella and Neisseriaceae were relatively more abundant in the healthy control group compared to the AA sample. Therefore, higher alpha diversity was observed in all three-layer biopsy samples of AA patients compared to the control. In conclusion, our data suggest that tAA could be defined as a “hair disease associated with dysregulated microbiome-immunity axis of hair follicles”.
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21
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Miracco C, DE Piano E, Marruganti C, Baldino G, Sorrentino E, Batsikosta A, Rubegni P, Angotti R, Messina M, Cinotti E. Folliculosebaceous units are a frequent finding in early lichen sclerosus of the foreskin. Ital J Dermatol Venerol 2022; 157:342-347. [PMID: 35666664 DOI: 10.23736/s2784-8671.22.07301-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2024]
Abstract
BACKGROUND Folliculosebaceous units (FSU) has been considered an early target of inflammation in vulvar lichen sclerosus (VLS). This diagnostic clue is not reported in lichen sclerosus (LS) of the foreskin (FLS) that is normally hairless. We evaluated the presence and inflammation of FSU and sebaceous glands (SG) in LS of the foreskin. METHODS Histological specimens from therapeutic circumcision were assessed in order to evaluate the frequency and inflammation of FSU and SG in LS. RESULTS Ninety-eight cases, grouped into 46 early (group 1) and 52 overt (group 2) FLS were included in the study. SG-FSU were found in 95.7% of group 1, and 65.4% of group 2 cases. Their density was inversely correlated with patient age (P=0.0014). We observed perifollicular inflammation in all cases with visible SG-FSU and frequent FSU abnormalities. CONCLUSIONS SG and FSU were frequent in early FLS and decreased in advanced disease and adults. We hypothesize that SG and FSU are involved in the inflammatory process leading to FLS. These data, which need further investigation, could help to better understand the pathogenesis of FLS.
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Affiliation(s)
- Clelia Miracco
- Section of Pathological Anatomy, Department of Medicine, Surgery and Neuroscience, University Hospital of Siena, Siena, Italy
| | - Ernesto DE Piano
- Department of Medicine, Surgery and Neuroscience, Dermatosurgery, University Hospital of Siena, Siena, Italy
| | - Crystal Marruganti
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Gennaro Baldino
- Department of Health Promotion Sciences, Maternal and Infant Care, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, Palermo, Italy
| | - Ester Sorrentino
- Section of Pathological Anatomy, Department of Medicine, Surgery and Neuroscience, University Hospital of Siena, Siena, Italy
| | - Anastasia Batsikosta
- Section of Pathological Anatomy, Department of Medicine, Surgery and Neuroscience, University Hospital of Siena, Siena, Italy
| | - Pietro Rubegni
- Department of Medicine, Surgery and Neuroscience, Dermatosurgery, University Hospital of Siena, Siena, Italy
| | - Rossella Angotti
- Department of Medicine, Surgery and Neuroscience, Pediatric Surgery, University Hospital of Siena, Siena, Italy
| | - Mario Messina
- Department of Medicine, Surgery and Neuroscience, Pediatric Surgery, University Hospital of Siena, Siena, Italy
| | - Elisa Cinotti
- Department of Medicine, Surgery and Neuroscience, Dermatosurgery, University Hospital of Siena, Siena, Italy -
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22
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A 3D-printed transepidermal microprojection array for human skin microbiome sampling. Proc Natl Acad Sci U S A 2022; 119:e2203556119. [PMID: 35867832 PMCID: PMC9335308 DOI: 10.1073/pnas.2203556119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Skin microbiome sampling is currently performed with tools such as swabs and tape strips to collect microbes from the skin surface. However, these conventional approaches may be unable to detect microbes deeper in the epidermis or in epidermal invaginations. We describe a sampling tool with a depth component, a transepidermal microprojection array (MPA), which captures microbial biomass from both the epidermal surface and deeper skin layers. We leveraged the rapid customizability of 3D printing to enable systematic optimization of MPA for human skin sampling. Evaluation of sampling efficacy on human scalp revealed the optimized MPA was comparable in sensitivity to swab and superior to tape strip, especially for nonstandard skin surfaces. We observed differences in species diversity, with the MPA detecting clinically relevant fungi more often than other approaches. This work delivers a tool in the complex field of skin microbiome sampling to potentially address gaps in our understanding of its role in health and disease.
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23
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Basmanav FB, Betz RC. Translational impact of omics studies in alopecia areata: recent advances and future perspectives. Expert Rev Clin Immunol 2022; 18:845-857. [PMID: 35770930 DOI: 10.1080/1744666x.2022.2096590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Alopecia areata (AA) is a non-scarring, hair loss disorder and a common autoimmune-mediated disease with an estimated lifetime risk of about 2%. To date, the treatment of AA is mainly based on suppression or stimulation of the immune response. Genomics and transcriptomics studies generated important insights into the underlying pathophysiology, enabled discovery of molecular disease signatures, which were used in some of the recent clinical trials to monitor drug response and substantiated the consideration of new therapeutic modalities for the treatment of AA such as abatacept, dupilumab, ustekinumab and Janus Kinase (JAK) inhibitors. AREAS COVERED In this review, genomics and transcriptomics studies in AA are discussed in detail with particular emphasis on their past and prospective translational impacts. Microbiome studies are also briefly introduced. EXPERT OPINION The generation of large datasets using the new high-throughput technologies has revolutionized medical research and AA has also benefited from the wave of omics studies. However, the limitations associated with JAK inhibitors and clinical heterogeneity in AA patients underscore the necessity for continuing omics research in AA for discovery of novel therapeutic modalities and development of clinical tools for precision medicine.
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Affiliation(s)
- F Buket Basmanav
- Medical Faculty & University Hospital Bonn, Institute of Human Genetics, University of Bonn, Bonn, Germany
| | - Regina C Betz
- Medical Faculty & University Hospital Bonn, Institute of Human Genetics, University of Bonn, Bonn, Germany
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24
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Hernandez Santos H, Clark J, Terwilliger A, Maresso A. Discovery of the First Lytic Staphylococcus pseudintermedius/ Staphylococcus aureus Polyvalent Bacteriophages. PHAGE (NEW ROCHELLE, N.Y.) 2022; 3:116-124. [PMID: 36157281 PMCID: PMC9248872 DOI: 10.1089/phage.2022.0004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Background There are no verified lytic Staphylococcus pseudintermedius phages in the literature and few temperate phage genomes in databases. S. pseudintermedius is an opportunistic zoonotic pathogen of great importance in veterinary and human medicine. Materials and Methods We discovered phages against canine-derived S. pseudintermedius isolates by screening dog feces, hair, and skin swabs. Fourteen new phages were isolated and characterized by genomic analysis, transmission electron microscopy, and host range determination. Results Three phages-DH2, DH5, and DS10, a phage K variant-were predicted lytic by sequencing, a designation supported by mitomycin C induction. All three are S. pseudintermedius and Staphylococcus aureus polyvalent phages, with DH2 and DS10 being strong killers of both species. Conclusions We report discovery of the first verified lytic S. pseudintermedius phages and suggest dog hair as a novel reservoir. DH2, DH5, and DS10 are promising candidates toward developing an anti-Staphylococcal phage cocktail.
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Affiliation(s)
- Haroldo Hernandez Santos
- Tailored Antibacterials and Innovative Laboratories for Phage (Φ) Research (TAILΦR), Baylor College of Medicine, Houston, Texas, USA
- Molecular Virology and Microbiology Department, Baylor College of Medicine, Houston, Texas, USA
| | - Justin Clark
- Tailored Antibacterials and Innovative Laboratories for Phage (Φ) Research (TAILΦR), Baylor College of Medicine, Houston, Texas, USA
- Molecular Virology and Microbiology Department, Baylor College of Medicine, Houston, Texas, USA
| | - Austen Terwilliger
- Tailored Antibacterials and Innovative Laboratories for Phage (Φ) Research (TAILΦR), Baylor College of Medicine, Houston, Texas, USA
- Molecular Virology and Microbiology Department, Baylor College of Medicine, Houston, Texas, USA
| | - Anthony Maresso
- Tailored Antibacterials and Innovative Laboratories for Phage (Φ) Research (TAILΦR), Baylor College of Medicine, Houston, Texas, USA
- Molecular Virology and Microbiology Department, Baylor College of Medicine, Houston, Texas, USA
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Rojas-Gätjens D, Valverde-Madrigal KS, Rojas-Jimenez K, Pereira R, Avey-Arroyo J, Chavarría M. Antibiotic-producing Micrococcales govern the microbiome that inhabits the fur of two- and three-toed sloths. Environ Microbiol 2022; 24:3148-3163. [PMID: 35621042 DOI: 10.1111/1462-2920.16082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 05/20/2022] [Accepted: 05/20/2022] [Indexed: 11/30/2022]
Abstract
Sloths have a dense coat on which insects, algae, and fungi coexist in a symbiotic relationship. This complex ecosystem requires different levels of control, however, most of these mechanisms remain unknown. We investigated the bacterial communities inhabiting the hair of two- (Choloepus Hoffmani) and three-toed (Bradypus variegatus) sloths and evaluated their potential for producing antibiotic molecules capable of exerting control over the hair microbiota. The analysis of 16S rRNA amplicon sequence variants (ASVs) revealed that the communities in both host species are dominated by Actinobacteriota and Firmicutes. The most abundant genera were Brevibacterium, Kocuria/Rothia, Staphylococcus, Rubrobacter, Nesterenkonia, and Janibacter. Furthermore, we isolated nine strains of Brevibacterium and Rothia capable of producing substances that inhibited the growth of common mammalian pathogens. The analysis of the biosynthetic gene clusters (BCGs) of these nine isolates suggests that the pathogen-inhibitory activity could be mediated by the presence of siderophores, terpenes, beta-lactones, Type III polyketide synthases (T3PKS), ribosomally synthesized, and post-translationally modified peptides (RiPPs), non-alpha poly-amino acids (NAPAA) like e-Polylysin, ectoine or nonribosomal peptides (NRPs). Our data suggest that Micrococcales that inhabit sloth hair could have a role in controlling microbial populations in that habitat, improving our understanding of this highly complex ecosystem. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Diego Rojas-Gätjens
- Centro Nacional de Innovaciones Biotecnológicas (CENIBiot), CeNAT-CONARE, 1174-1200, San José, Costa Rica
| | | | - Keilor Rojas-Jimenez
- Escuela de Biología, Universidad de Costa Rica, 11501-2060, San José, Costa Rica
| | - Reinaldo Pereira
- Laboratorio Nacional de Nanotecnología (LANOTEC), CeNAT-CONARE, 1174-1200, San José, Costa Rica
| | | | - Max Chavarría
- Centro Nacional de Innovaciones Biotecnológicas (CENIBiot), CeNAT-CONARE, 1174-1200, San José, Costa Rica.,Escuela de Química, Universidad de Costa Rica, 11501-2060, San José, Costa Rica.,Centro de Investigaciones en Productos Naturales (CIPRONA), Universidad de Costa Rica, 11501-2060, San José, Costa Rica
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26
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Senna MM, Peterson E, Jozic I, Chéret J, Paus R. Frontiers in Lichen Planopilaris and Frontal Fibrosing Alopecia Research: Pathobiology Progress and Translational Horizons. JID INNOVATIONS 2022; 2:100113. [PMID: 35521043 PMCID: PMC9062486 DOI: 10.1016/j.xjidi.2022.100113] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 01/21/2022] [Accepted: 01/26/2022] [Indexed: 01/06/2023] Open
Abstract
Lichen planopilaris (LPP) and frontal fibrosing alopecia (FFA) are primary, lymphocytic cicatricial hair loss disorders. These model epithelial stem cell (SC) diseases are thought to result from a CD8+ T-cell‒dominated immune attack on the hair follicle (HF) SC niche (bulge) after the latter has lost its immune privilege (IP) for as yet unknown reasons. This induces both apoptosis and pathological epithelial‒mesenchymal transition in epithelial SCs, thus depletes the bulge, causes fibrosis, and ultimately abrogates the HFs' capacity to regenerate. In this paper, we synthesize recent progress in LPP and FFA pathobiology research, integrate our limited current understanding of the roles that genetic, hormonal, environmental, and other factors may play, and define major open questions. We propose that LPP and FFA share a common initial pathobiology, which then bifurcates into two distinct clinical phenotypes, with macrophages possibly playing a key role in phenotype determination. As particularly promising translational research avenues toward direly needed progress in the management of these disfiguring, deeply distressful cicatricial alopecia variants, we advocate to focus on the development of bulge IP and epithelial SC protectants such as, for example, topically effective, HF‒penetrating and immunoinhibitory preparations that contain tacrolimus, peroxisome proliferator-activated receptor-γ, and/or CB1 agonists.
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Key Words
- 5ARI, 5α-reductase inhibitor
- AA, alopecia areata
- AGA, androgenetic alopecia
- CRH, corticotropin-releasing hormone
- EMT, epithelial‒mesenchymal transition
- FFA, frontal fibrosing alopecia
- HF, hair follicle
- IP, immune privilege
- K, keratin
- KC, keratinocyte
- LPP, lichen planopilaris
- MAC, macrophage
- MHC, major histocompatibility complex
- PCA, primary cicatricial alopecia
- PCP, personal care product
- PPAR-γ, peroxisome proliferator–activated receptor-γ
- SC, stem cell
- SP, substance P
- eHFSC, epithelial hair follicle stem cell
- α-MSH, α-melanocyte-stimulating hormone
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Affiliation(s)
- Maryanne Makredes Senna
- Department of Dermatology, Massachusetts General Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA
| | - Erik Peterson
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Ivan Jozic
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Jérémy Chéret
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Ralf Paus
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, University of Miami, Miami, Florida, USA.,Monasterium Laboratory, Münster, Germany.,CUTANEON, Hamburg, Germany
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27
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Kayıran MA, Sahin E, Koçoğlu E, Sezerman OU, Gürel MS, Karadağ AS. Is cutaneous microbiota a player in disease pathogenesis? Comparison of cutaneous microbiota in psoriasis and seborrheic dermatitis with scalp involvement. Indian J Dermatol Venereol Leprol 2022; 88:738-748. [PMID: 35389020 DOI: 10.25259/ijdvl_323_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 10/01/2021] [Indexed: 11/04/2022]
Abstract
BACKGROUND Knowledge about cutaneous microbiota in psoriasis vulgaris and seborrheic dermatitis is limited, and a comparison of microbiota in the two diseases was not yet previously undertaken. AIMS/OBJECTIVES This study aimed to compare the scalp lesional and non-lesional microbiota in psoriasis vulgaris and seborrheic dermatitis with that in a healthy control group. METHODS Fifty samples were taken with sterile swabs from patients' and controls' scalps, and 16S rRNA gene sequencing analyses were performed. RESULTS Alpha and beta diversity analyses showed that bacterial load and diversity were significantly increased in psoriasis vulgaris and seborrheic dermatitis lesions compared to the controls. As phyla, Actinobacteria decreased and Firmicutes increased, while as genera, Propionibacterium decreased; Staphylococcus, Streptococcus, Aquabacterium, Neisseria and Azospirillum increased in lesions of both diseases. Specifically, Mycobacterium, Finegoldia, Haemophilus and Ezakiella increased in psoriasis vulgaris and Enhydrobacter, Micromonospora and Leptotrichia increased in seborrheic dermatitis lesions. Mycobacterium, Ezakiella and Peptoniphilus density were higher in psoriasis vulgaris compared to seborrheic dermatitis lesions. The bacterial diversity and load values of non-lesional scalp in psoriasis vulgaris and seborrheic dermatitis lay between those of lesional areas and controls. LIMITATIONS The small sample size is the main limitation of this study. CONCLUSION Higher bacterial diversity was detected in lesions of both psoriasis and seborrheic dermatitis compared to the controls, but similar alterations were observed when the two diseases were compared. Although these differences could be a result rather than a cause of the two diseases, there is a need to analyze all members of the microbiota and microbiota-host interactions.
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Affiliation(s)
- Melek Aslan Kayıran
- Department of Dermatology, Faculty of Medicine, Istanbul Medeniyet University, Göztepe Prof. Dr. Süleyman Yalçın City Hospital, Istanbul, Turkey
| | - Eray Sahin
- Department of Biostatistics and Bioinformatics, Acibadem Mehmet Ali Aydinlar University, Institute of Health Sciences, Istanbul, Turkey
| | - Esra Koçoğlu
- Department of Clinical Microbiology, Faculty of Medicine, Istanbul Medeniyet University, Göztepe Prof. Dr. Süleyman Yalçın City Hospital, Istanbul, Turkey
| | - Osman Uğur Sezerman
- Department of Biostatistics and Bioinformatics, Acibadem Mehmet Ali Aydinlar University, Institute of Health Sciences, Istanbul, Turkey
| | - Mehmet Salih Gürel
- Department of Dermatology, Faculty of Medicine, Istanbul Medeniyet University, Göztepe Prof. Dr. Süleyman Yalçın City Hospital, Istanbul, Turkey
| | - Ayşe Serap Karadağ
- Department of Dermatology, Arel University Medical School, Memorial Health Group, Atasehir and Sisli Hospital, Dermatology Clinic, Istanbul, Turkey
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28
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Hwang J, Rick J, Hsiao J, Hamzavi IH, Shi VY. Microbiome in Hidradenitis Suppurativa: Current Evidence and Practice. CURRENT DERMATOLOGY REPORTS 2022. [DOI: 10.1007/s13671-021-00349-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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29
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Lousada MB, Lachnit T, Edelkamp J, Paus R, Bosch TCG. Hydra and the hair follicle - An unconventional comparative biology approach to exploring the human holobiont. Bioessays 2022; 44:e2100233. [PMID: 35261041 DOI: 10.1002/bies.202100233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 02/02/2022] [Accepted: 02/17/2022] [Indexed: 12/14/2022]
Abstract
The microbiome of human hair follicles (HFs) has emerged as an important player in different HF and skin pathologies, yet awaits in-depth exploration. This raises questions regarding the tightly linked interactions between host environment, nutrient dependency of host-associated microbes, microbial metabolism, microbe-microbe interactions and host immunity. The use of simple model systems facilitates addressing generally important questions and testing overarching, therapeutically relevant principles that likely transcend obvious interspecies differences. Here, we evaluate the potential of the freshwater polyp Hydra, to dissect fundamental principles of microbiome regulation by the host, that is the human HF. In particular, we focus on therapeutically targetable host-microbiome interactions, such as nutrient dependency, microbial interactions and host defence. Offering a new lens into the study of HF - microbiota interactions, we argue that general principles of how Hydra manages its microbiota can inform the development of novel, microbiome-targeting therapeutic interventions in human skin disease.
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Affiliation(s)
- Marta B Lousada
- Monasterium Laboratory Skin & Hair Research, Münster, Germany.,Zoological Institute, Christian-Albrechts, University of Kiel, Kiel, Germany
| | - Tim Lachnit
- Zoological Institute, Christian-Albrechts, University of Kiel, Kiel, Germany
| | - Janin Edelkamp
- Monasterium Laboratory Skin & Hair Research, Münster, Germany
| | - Ralf Paus
- Monasterium Laboratory Skin & Hair Research, Münster, Germany.,Dr. Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Thomas C G Bosch
- Zoological Institute, Christian-Albrechts, University of Kiel, Kiel, Germany
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30
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Carmona-Cruz S, Orozco-Covarrubias L, Sáez-de-Ocariz M. The Human Skin Microbiome in Selected Cutaneous Diseases. Front Cell Infect Microbiol 2022; 12:834135. [PMID: 35321316 PMCID: PMC8936186 DOI: 10.3389/fcimb.2022.834135] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 01/31/2022] [Indexed: 12/28/2022] Open
Abstract
The human skin harbors a wide variety of microbes that, together with their genetic information and host interactions, form the human skin microbiome. The role of the human microbiome in the development of various diseases has lately gained interest. According to several studies, changes in the cutaneous microbiota are involved in the pathophysiology of several dermatoses. A better delineation of the human microbiome and its interactions with the innate and adaptive immune systems could lead to a better understanding of these diseases, as well as the opportunity to achieve new therapeutic modalities. The present review centers on the most recent knowledge on skin microbiome and its participation in the pathogenesis of several skin disorders: atopic and seborrheic dermatitis, alopecia areata, psoriasis and acne.
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31
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Exosomes Secreted from Adipose-Derived Stem Cells Are a Potential Treatment Agent for Immune-Mediated Alopecia. J Immunol Res 2022; 2022:7471246. [PMID: 35155688 PMCID: PMC8831060 DOI: 10.1155/2022/7471246] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Revised: 12/29/2021] [Accepted: 01/08/2022] [Indexed: 12/19/2022] Open
Abstract
Background Alopecia has become an exceedingly prevalent dermatological disorder. Etiologically, infection (bacterial and fungal infection), inflammation, and immune dysregulation are the main causes of immune-mediated hair loss. Treating hair loss has remained challenging as the available therapies are limited. Exosomes from adipose-derived stem cells (ADSC-Exos) have been used for treating neurodegenerative diseases and autoimmune diseases and in wound-healing treatments. However, the function and mechanism of ADSC-Exos in alopecia treatment remain unclear. This study is aimed at investigating the effects of ADSC-Exos on hair growth in vitro and in vivo for potentially treating immune-mediated alopecia and further exploring the underlying mechanism. Methods Cell proliferation, migration, and apoptosis of dermal papilla cells (DPCs) that were treated with ADSC-Exos were detected using the cell counting kit-8 (CCK-8) assay, scratch wound-healing assay, and flow cytometry assay, respectively. A C57BL/6 hair-depilated mouse model was established in vivo; then, ADSC-Exos were subcutaneously injected alone or in combined with minoxidil. The effects of ADSC-Exos on hair growth, pathological changes, and the related mechanism were investigated by HE staining, quantitative real‐time PCR (qRT-PCR), western blotting, and RNA sequencing (RNA-seq). Results ADSC-Exos significantly promoted DPC proliferation and migration while also reducing apoptosis. In addition, compared with the control group, ADSC-Exos-treated mice had better hair growth, more hair follicles (HFs) and thicker dermis. RNA-seq revealed that the miR-22 and TNF-α signaling pathways were markedly downregulated in DPCs after ADSC-Exos treatment. In addition, according to qRT-PCR and western blotting results, the Wnt/β-catenin signaling pathway was activated in the skin of ADSC-Exos-treated mice. Conclusion ADSC-Exos therapy positively affected the promotion of hair regrowth by regulating miR-22, the Wnt/β-catenin signaling pathway, and the TNF-α signaling pathway, implying that ADSC-Exos could be a promising cell-free therapeutic strategy for immune-mediated alopecia.
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32
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Biological Efficacy Evaluation of a Non-Cross-Linked Hyaluronic Acid Dermal Filler for Biomedical Application in Inflammatory Scalp Conditions. Life (Basel) 2021; 12:life12010002. [PMID: 35054394 PMCID: PMC8781863 DOI: 10.3390/life12010002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 12/10/2021] [Accepted: 12/16/2021] [Indexed: 11/23/2022] Open
Abstract
(1) Background: The dysbiosis of some cutaneous commensal microorganisms is the trigger factor for the activation of the inflammatory cascade by keratinocytes in many skin disorders. Mesotherapy is an innovative technique for many scalp disorders, with the function of restoring the physiology of the skin. (2) Methods: the antimicrobial, antibiofilm and anti-inflammatory activity of the non-cross-linked HA formulation (Hydro Deluxe, Matex Lab S.p.a., Brindisi, Italy) was investigated against the most common microorganisms of the scalp (Staphyloccoccus epidermis, Staphyloccoccus aureus, Cutibacterium acnes and Malassezia furfur). Anti-inflammatory activity was evaluated on an internal 3D model of Reconstructed Human Epidermis (RHE) inserts infected with the strains as pro-inflammatory stimulus. (3) Results and Conclusions: the data collected showed a good antimicrobial and antibiofilm activity against all selected strains. The HA-based formulation did not show cytotoxicity on RHE, either alone or in presence of the infectious stimulus. The analysis of the expression of Interleukin (IL)-8 levels showed an excellent ability to reduce this pro-inflammatory marker. Overall, the efficacy assessment of the formulation supported its potential effectiveness in mesotherapy for the treatment of scalp disorders.
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Bay L, Ring HC. Human skin microbiota in health and disease: The cutaneous communities' interplay in equilibrium and dysbiosis: The cutaneous communities' interplay in equilibrium and dysbiosis. APMIS 2021; 130:706-718. [PMID: 34919288 DOI: 10.1111/apm.13201] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 12/14/2021] [Indexed: 01/20/2023]
Abstract
Cutaneous microbial composition is driven by the microenvironment of the skin, as well as by internal and external factors. Local changes in the microenvironment can affect the configuration of the community, which may lead toward an imbalance of microbiota. Alterations in the microbial profile are common in both inflammatory skin diseases and chronic infections. A shift in balance within the microbiota, toward limited variation and a greater abundance of specific pathogens, may further worsen the pathogenicity of the diseases. These alterations may be prevented by topical treatment of probiotic solutions stimulating a balanced multispecies community. Compositional variations may further constitute potential biomarkers to predict flares or monitor efficacy during therapy. New approaches such as machine learning may contribute to this prediction of microbial alterations prior to the development of chronic infections and flares. This review provides insight into the composition and distribution of a healthy community of microorganisms in the skin and draws parallels with the community in chronic infections and chronic inflammatory skin diseases such acne vulgaris and Hidradenitis Suppurativa. We discuss the potential role of specific species in the pathogenesis and the possible prevention of disease exacerbation.
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Affiliation(s)
- Lene Bay
- Bacterial Infection Biology, Costerton Biofilm Center, Department of Immunology and Microbiology, Faculty of Health Science, University of Copenhagen, Copenhagen, Denmark
| | - Hans Christian Ring
- Department of Dermato-Venereology and Wound Healing Centre, Bispebjerg Hospital, Copenhagen, Denmark.,Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
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Miyauchi K, Ki S, Ukai M, Suzuki Y, Inoue K, Suda W, Matsui T, Ito Y, Honda K, Koseki H, Ohara O, Tanaka RJ, Okada-Hatakeyama M, Kubo M. Essential Role of STAT3 Signaling in Hair Follicle Homeostasis. Front Immunol 2021; 12:663177. [PMID: 34867936 PMCID: PMC8635990 DOI: 10.3389/fimmu.2021.663177] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 10/25/2021] [Indexed: 12/13/2022] Open
Abstract
Dominant-negative mutations associated with signal transducer and activator of transcription 3 (STAT3) signaling, which controls epithelial proliferation in various tissues, lead to atopic dermatitis in hyper IgE syndrome. This dermatitis is thought to be attributed to defects in STAT3 signaling in type 17 helper T cell specification. However, the role of STAT3 signaling in skin epithelial cells remains unclear. We found that STAT3 signaling in keratinocytes is required to maintain skin homeostasis by negatively controlling the expression of hair follicle-specific keratin genes. These expression patterns correlated with the onset of dermatitis, which was observed in specific pathogen-free conditions but not in germ-free conditions, suggesting the involvement of Toll-like receptor-mediated inflammatory responses. Thus, our study suggests that STAT3-dependent gene expression in keratinocytes plays a critical role in maintaining the homeostasis of skin, which is constantly exposed to microorganisms.
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Affiliation(s)
- Kosuke Miyauchi
- Laboratory for Cytokine Regulation, Center for Integrative Medical Science (IMS), RIKEN Yokohama Institute, Yokohama, Japan
| | - Sewon Ki
- Laboratory for Cytokine Regulation, Center for Integrative Medical Science (IMS), RIKEN Yokohama Institute, Yokohama, Japan
| | - Masao Ukai
- Laboratory for Integrated Cellular Systems, Center for Integrative Medical Science (IMS), RIKEN Yokohama Institute, Yokohama, Japan
- Graduate School of Medical Life Sciences, Yokohama City University, Yokohama, Japan
| | - Yoshie Suzuki
- Laboratory for Cytokine Regulation, Center for Integrative Medical Science (IMS), RIKEN Yokohama Institute, Yokohama, Japan
| | - Kentaro Inoue
- Laboratory for Integrated Cellular Systems, Center for Integrative Medical Science (IMS), RIKEN Yokohama Institute, Yokohama, Japan
- Department of Computer Science and Systems Engineering, Faculty of Engineering, University of Miyazaki, Miyazaki-shi, Japan
| | - Wataru Suda
- Laboratory for Microbiome science, Center for Integrative Medical Science (IMS), RIKEN Yokohama Institute, Yokohama, Japan
- Graduate School of Frontier Sciences, The University of Tokyo, Chiba, Japan
| | - Takeshi Matsui
- Laboratory for Evolutionary Cell Biology of the Skin, School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Japan
| | - Yoshihiro Ito
- Laboratory for Gut Homeostasis, Center for Integrative Medical Science (IMS), RIKEN Yokohama Institute, Yokohama, Japan
| | - Kenya Honda
- Laboratory for Gut Homeostasis, Center for Integrative Medical Science (IMS), RIKEN Yokohama Institute, Yokohama, Japan
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo, Japan
| | - Haruhiko Koseki
- Disease Biology Group, RIKEN Medical Sciences Innovation Hub Program, Kanagawa, Japan
- Laboratory for Developmental Genetics, Center for Integrative Medical Science (IMS), RIKEN Yokohama Institute, Yokohama, Japan
| | - Osamu Ohara
- Laboratory for Integrative Genomics, Center for Integrative Medical Science (IMS), RIKEN Yokohama Institute, Yokohama, Japan
- Department of Applied Genomics, Kazusa DNA Research Institute, Kisarazu, Japan
| | - Reiko J. Tanaka
- Department of Bioengineering, Imperial College London, London, United Kingdom
| | - Mariko Okada-Hatakeyama
- Laboratory for Integrated Cellular Systems, Center for Integrative Medical Science (IMS), RIKEN Yokohama Institute, Yokohama, Japan
- Graduate School of Medical Life Sciences, Yokohama City University, Yokohama, Japan
- Institute for Protein Research, Osaka University, Suita-shi, Japan
| | - Masato Kubo
- Laboratory for Cytokine Regulation, Center for Integrative Medical Science (IMS), RIKEN Yokohama Institute, Yokohama, Japan
- Division of Molecular Pathology, Research Institute for Biomedical Science, Tokyo University of Science, Noda-shi, Japan
- *Correspondence: Masato Kubo,
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Pistone D, Meroni G, Panelli S, D’Auria E, Acunzo M, Pasala AR, Zuccotti GV, Bandi C, Drago L. A Journey on the Skin Microbiome: Pitfalls and Opportunities. Int J Mol Sci 2021; 22:9846. [PMID: 34576010 PMCID: PMC8469928 DOI: 10.3390/ijms22189846] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 12/22/2022] Open
Abstract
The human skin microbiota is essential for maintaining homeostasis and ensuring barrier functions. Over the years, the characterization of its composition and taxonomic diversity has reached outstanding goals, with more than 10 million bacterial genes collected and cataloged. Nevertheless, the study of the skin microbiota presents specific challenges that need to be addressed in study design. Benchmarking procedures and reproducible and robust analysis workflows for increasing comparability among studies are required. For various reasons and because of specific technical problems, these issues have been investigated in gut microbiota studies, but they have been largely overlooked for skin microbiota. After a short description of the skin microbiota, the review tackles methodological aspects and their pitfalls, covering NGS approaches and high throughput culture-based techniques. Recent insights into the "core" and "transient" types of skin microbiota and how the manipulation of these communities can prevent or combat skin diseases are also covered. Finally, this review includes an overview of the main dermatological diseases, the changes in the microbiota composition associated with them, and the recommended skin sampling procedures. The last section focuses on topical and oral probiotics to improve and maintain skin health, considering their possible applications for skin diseases.
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Affiliation(s)
- Dario Pistone
- Pediatric Clinical Research Center “Invernizzi”, Department of Biomedical and Clinical Sciences “L. Sacco”, University of Milan, 20157 Milan, Italy; (S.P.); (A.R.P.); (G.V.Z.)
- Department of Biomedical Sciences for Health, University of Milan, 20133 Milan, Italy;
| | - Gabriele Meroni
- Department of Biomedical Surgical and Dental Sciences-One Health Unit, University of Milan, 20133 Milan, Italy;
| | - Simona Panelli
- Pediatric Clinical Research Center “Invernizzi”, Department of Biomedical and Clinical Sciences “L. Sacco”, University of Milan, 20157 Milan, Italy; (S.P.); (A.R.P.); (G.V.Z.)
| | - Enza D’Auria
- Department of Pediatrics, Children’s Hospital Vittore Buzzi, University of Milan, 20154 Milan, Italy; (E.D.); (M.A.)
| | - Miriam Acunzo
- Department of Pediatrics, Children’s Hospital Vittore Buzzi, University of Milan, 20154 Milan, Italy; (E.D.); (M.A.)
| | - Ajay Ratan Pasala
- Pediatric Clinical Research Center “Invernizzi”, Department of Biomedical and Clinical Sciences “L. Sacco”, University of Milan, 20157 Milan, Italy; (S.P.); (A.R.P.); (G.V.Z.)
| | - Gian Vincenzo Zuccotti
- Pediatric Clinical Research Center “Invernizzi”, Department of Biomedical and Clinical Sciences “L. Sacco”, University of Milan, 20157 Milan, Italy; (S.P.); (A.R.P.); (G.V.Z.)
- Department of Pediatrics, Children’s Hospital Vittore Buzzi, University of Milan, 20154 Milan, Italy; (E.D.); (M.A.)
| | - Claudio Bandi
- Pediatric Clinical Research Center “Invernizzi”, Department of Biosciences, University of Milan, 20133 Milan, Italy;
| | - Lorenzo Drago
- Department of Biomedical Sciences for Health, University of Milan, 20133 Milan, Italy;
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36
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Limbu SL, Purba TS, Harries M, Wikramanayake TC, Miteva M, Bhogal RK, O'Neill CA, Paus R. A folliculocentric perspective of dandruff pathogenesis: Could a troublesome condition be caused by changes to a natural secretory mechanism? Bioessays 2021; 43:e2100005. [PMID: 34486144 DOI: 10.1002/bies.202100005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 07/30/2021] [Accepted: 08/03/2021] [Indexed: 01/19/2023]
Abstract
Dandruff is a common scalp condition, which frequently causes psychological distress in those affected. Dandruff is considered to be caused by an interplay of several factors. However, the pathogenesis of dandruff remains under-investigated, especially with respect to the contribution of the hair follicle. As the hair follicle exhibits unique immune-modulatory properties, including the creation of an immunoinhibitory, immune-privileged milieu, we propose a novel hypothesis taking into account the role of the hair follicle. We hypothesize that the changes and imbalance of yeast and bacterial species, along with increasing proinflammatory sebum by-products, leads to the activation of immune response and inflammation. Hair follicle keratinocytes may then detect these changes in scalp microbiota resulting in the recruitment of leukocytes to the inflammation site. These changes in the scalp skin immune-microenvironment may impact hair follicle immune privilege status, which opens new avenues into exploring the role of the hair follicle in dandruff pathogenesis. Also see the video abstract here: https://youtu.be/mEZEznCYtNs.
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Affiliation(s)
- Susan L Limbu
- Centre for Dermatology Research, University of Manchester & NIHR Biomedical Research Centre, Manchester, UK
| | - Talveen S Purba
- Centre for Dermatology Research, University of Manchester & NIHR Biomedical Research Centre, Manchester, UK
| | - Matthew Harries
- Centre for Dermatology Research, University of Manchester & NIHR Biomedical Research Centre, Manchester, UK.,Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Tongyu C Wikramanayake
- Dr. Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Mariya Miteva
- Dr. Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Ranjit K Bhogal
- Unilever R&D Colworth, Colworth Science Park, Sharnbrook, UK
| | - Catherine A O'Neill
- Centre for Dermatology Research, University of Manchester & NIHR Biomedical Research Centre, Manchester, UK
| | - Ralf Paus
- Centre for Dermatology Research, University of Manchester & NIHR Biomedical Research Centre, Manchester, UK.,Dr. Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA.,Monasterium Laboratory, Münster, Germany
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37
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Alopecia and the Microbiome: A Future Therapeutic Target? ACTAS DERMO-SIFILIOGRAFICAS 2021. [DOI: 10.1016/j.adengl.2021.03.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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38
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Barquero-Orias D, Muñoz Moreno-Arrones O, Vañó-Galván S. Alopecia y microbioma: ¿futura diana terapéutica? ACTAS DERMO-SIFILIOGRAFICAS 2021. [DOI: 10.1016/j.ad.2020.12.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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39
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Lousada MB, Lachnit T, Edelkamp J, Rouillé T, Ajdic D, Uchida Y, Di Nardo A, Bosch TCG, Paus R. Exploring the human hair follicle microbiome. Br J Dermatol 2021; 184:802-815. [PMID: 32762039 DOI: 10.1111/bjd.19461] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/31/2020] [Indexed: 12/31/2022]
Abstract
Human hair follicles (HFs) carry complex microbial communities that differ from the skin surface microbiota. This likely reflects that the HF epithelium differs from the epidermal barrier in that it provides a moist, less acidic, and relatively ultraviolet light-protected environment, part of which is immune-privileged, thus facilitating microbial survival. Here we review the current understanding of the human HF microbiome and its potential physiological and pathological functions, including in folliculitis, acne vulgaris, hidradenitis suppurativa, alopecia areata and cicatricial alopecias. While reviewing the main human HF bacteria (such as Propionibacteria, Corynebacteria, Staphylococci and Streptococci), viruses, fungi and parasites as human HF microbiome constituents, we advocate a broad view of the HF as an integral part of the human holobiont. Specifically, we explore how the human HF may manage its microbiome via the regulated production of antimicrobial peptides (such as cathelicidin, psoriasin, RNAse7 and dermcidin) by HF keratinocytes, how the microbiome may impact on cytokine and chemokine release from the HF, and examine hair growth-modulatory effects of antibiotics, and ask whether the microbiome affects hair growth in turn. We highlight major open questions and potential novel approaches to the management of hair diseases by targeting the HF microbiome.
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Affiliation(s)
- M B Lousada
- Monasterium Laboratory, Münster, Germany
- Zoological Institute, Christian-Albrechts University Kiel, Kiel, Germany
| | - T Lachnit
- Zoological Institute, Christian-Albrechts University Kiel, Kiel, Germany
| | - J Edelkamp
- Monasterium Laboratory, Münster, Germany
| | - T Rouillé
- Monasterium Laboratory, Münster, Germany
| | - D Ajdic
- Dr. Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Y Uchida
- Monasterium Laboratory, Münster, Germany
| | - A Di Nardo
- Department of Dermatology, University of California, San Diego, CA, USA
| | - T C G Bosch
- Zoological Institute, Christian-Albrechts University Kiel, Kiel, Germany
| | - R Paus
- Monasterium Laboratory, Münster, Germany
- Dr. Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
- Centre for Dermatology Research, School of Biological Sciences, University of Manchester & NIHR Biomedical Research Centre, Manchester, UK
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40
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Bispo Lousada M, Edelkamp J, Lachnit T, Erdmann H, Paus R. Can antibiotic-induced changes in the composition of the hair follicle microbiome regulate human hair growth? Exp Dermatol 2021; 30:1440-1441. [PMID: 33905569 DOI: 10.1111/exd.14364] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 04/13/2021] [Accepted: 04/18/2021] [Indexed: 12/20/2022]
Affiliation(s)
- Marta Bispo Lousada
- Monasterium Laboratory, Münster, Germany.,Zoological Institute, Christian-Albrechts University Kiel, Kiel, Germany
| | | | - Tim Lachnit
- Zoological Institute, Christian-Albrechts University Kiel, Kiel, Germany
| | - Hanieh Erdmann
- Dr. Hanieh's Hair Academy and Research, Kosmed Klinik, Hamburg, Germany
| | - Ralf Paus
- Monasterium Laboratory, Münster, Germany.,Dr Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.,Centre for Dermatology Research, School of Biological Sciences, University of Manchester & NIHR Biomedical Research Centre, Manchester, UK
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41
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Williams KL, Garza LA. Diverse cellular players orchestrate regeneration after wounding. Exp Dermatol 2021; 30:605-612. [PMID: 33251597 PMCID: PMC8059097 DOI: 10.1111/exd.14248] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/30/2020] [Accepted: 11/19/2020] [Indexed: 12/11/2022]
Abstract
Fibrosis is one of the largest sources of human morbidity. The skin is a complex organ where interplay between diverse cell types and signalling pathways is essential both in homeostasis and wound repair, which can result in fibrosis or regeneration. This makes skin a useful model to study fibrosis and regeneration. While fibrosis often occurs postinjury, both clinical and laboratory observations suggest skin regeneration, complete with reconstituted cell diversity and de novo hair follicles, is possible. Extensive research performed in pursuit of skin regeneration has elucidated the key players, both cellular and molecular. Interestingly, some cells known for their homeostatic function are not implicated in regeneration or wound-induced hair neogenesis (WIHN), suggesting regeneration harnesses separate functional pathways from embryogenesis or other non-homeostatic mechanisms. For example, classic bulge cells, noted for their role in normally cycling hair follicles, do not finally contribute to long-lived cells in the regenerated tissue. During healing, multiple populations of cells, among them specific epithelial lineages, mesenchymal cells, and immune cells promote regenerative outcomes in the wounded skin. Ultimately, targeting specific populations of cells will be essential in manipulating a postwound environment to favour regeneration in lieu of fibrosis.
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Affiliation(s)
- Kaitlin L Williams
- Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Luis A Garza
- Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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42
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Meloni M, Balzaretti S, Collard N, Desaint S, Laperdrix C. Reproducing the scalp microbiota community: co-colonization of a 3D reconstructed human epidermis with C. acnes and M. restricta. Int J Cosmet Sci 2021; 43:235-245. [PMID: 33469935 DOI: 10.1111/ics.12688] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 12/10/2020] [Accepted: 12/18/2020] [Indexed: 12/14/2022]
Abstract
OBJECTIVE A 3D reconstructed human epidermis (RHE) model colonized with specific microbial strains was developed to model the complex interactions between strains of the human scalp hair. METHODS Reconstructed human epidermis was colonized with Cutibacterium acnes and Malassezia restricta for 72 h. The epidermal model was characterized in terms of morphology, using immune-labelling targeting biomarkers for barrier structure, proliferation, differentiation and anti-microbial defence. The barrier function was assessed by transepithelial electrical eesistance (TEER) measurements. In order to study the microorganisms on the epidermal model, viable counts and phenotype ultrastructure analysis were performed by scanning electron microscopy (SEM). RESULTS The RHE colonized with C. acnes did not lead to severe modifications of the physiological barrier integrity and viability, though it shows aggregates. M. restricta formed large aggregates by a close interaction with the RHE, thus causing both a strong decrease in barrier function and structure degradation and an increased human beta defensin 2 (HBD2) expression. The co-colonized model resulted in barrier depletion, but the overall damage was less severe, respecting the single colonization with M. restricta. The developed 'scalp model' allowed to identify morphological modifications leading to uncontrolled epidermal renewal. CONCLUSION This study shows a pre-clinical model that recapitulates the interactions that can occur between site-specific microbial strains and keratinocytes in dandruff condition. The model can be applied to assess ingredients and products' mechanism of action.
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43
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Dysbiosis and Enhanced Beta-Defensin Production in Hair Follicles of Patients with Lichen Planopilaris and Frontal Fibrosing Alopecia. Biomedicines 2021; 9:biomedicines9030266. [PMID: 33800045 PMCID: PMC7999846 DOI: 10.3390/biomedicines9030266] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/16/2021] [Accepted: 03/02/2021] [Indexed: 01/06/2023] Open
Abstract
Despite their distinct clinical manifestation, frontal fibrosing alopecia (FFA) and lichen planopilaris (LPP) display similar histopathologic features. Aberrant innate immune responses to endogenous or exogenous triggers have been discussed as factors that could drive inflammatory cascades and the collapse of the stem cell niche. In this exploratory study, we investigate the bacterial composition of scalp skin and plucked hair follicles (HF) of patients with FFA, LPP and alopecia areata circumscripta (AAc), as well as healthy individuals, in relation to cellular infiltrates and the expression of defense mediators. The most abundant genus in lesional and non-lesional HFs of LPP and FFA patients was Staphylococcus, while Lawsonella dominated in healthy individuals and in AAc patients. We observed statistically significant differences in the ratio of Firmicutes to Actinobacteria between healthy scalp, lesional, and non-lesional sites of FFA and LPP patients. This marked dysbiosis in FFA and LPP in compartments close to the bulge was associated with increased HβD1 and HβD2 expression along the HFs from lesional sites, while IL-17A was increased in lesional HF from AAc patients. The data encourage further studies on how exogenous factors and molecular interactions across the HF epithelium could contribute to disease onset and propagation.
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44
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De Pessemier B, Grine L, Debaere M, Maes A, Paetzold B, Callewaert C. Gut-Skin Axis: Current Knowledge of the Interrelationship between Microbial Dysbiosis and Skin Conditions. Microorganisms 2021; 9:353. [PMID: 33670115 PMCID: PMC7916842 DOI: 10.3390/microorganisms9020353] [Citation(s) in RCA: 201] [Impact Index Per Article: 67.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/25/2021] [Accepted: 02/07/2021] [Indexed: 02/06/2023] Open
Abstract
The microbiome plays an important role in a wide variety of skin disorders. Not only is the skin microbiome altered, but also surprisingly many skin diseases are accompanied by an altered gut microbiome. The microbiome is a key regulator for the immune system, as it aims to maintain homeostasis by communicating with tissues and organs in a bidirectional manner. Hence, dysbiosis in the skin and/or gut microbiome is associated with an altered immune response, promoting the development of skin diseases, such as atopic dermatitis, psoriasis, acne vulgaris, dandruff, and even skin cancer. Here, we focus on the associations between the microbiome, diet, metabolites, and immune responses in skin pathologies. This review describes an exhaustive list of common skin conditions with associated dysbiosis in the skin microbiome as well as the current body of evidence on gut microbiome dysbiosis, dietary links, and their interplay with skin conditions. An enhanced understanding of the local skin and gut microbiome including the underlying mechanisms is necessary to shed light on the microbial involvement in human skin diseases and to develop new therapeutic approaches.
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Affiliation(s)
- Britta De Pessemier
- Center for Microbial Ecology and Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (B.D.P.); (M.D.); (A.M.)
| | - Lynda Grine
- Department of Head & Skin, Ghent University, Corneel Heymanslaan 10, 9000 Ghent, Belgium;
| | - Melanie Debaere
- Center for Microbial Ecology and Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (B.D.P.); (M.D.); (A.M.)
| | - Aglaya Maes
- Center for Microbial Ecology and Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (B.D.P.); (M.D.); (A.M.)
| | | | - Chris Callewaert
- Center for Microbial Ecology and Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (B.D.P.); (M.D.); (A.M.)
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45
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Paus R. Shining a (blue) light on hair follicle chronobiology and photobiomodulation. Exp Dermatol 2021; 30:189-192. [PMID: 33433942 DOI: 10.1111/exd.14271] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Ralf Paus
- Dr Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.,Centre for Dermatology Research, University of Manchester, NIHR Manchester Biomedical Research Centre, Manchester, UK.,Monasterium Laboratory, Münster, Germany
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46
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Affiliation(s)
- Ralf Paus
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA; Centre for Dermatology Research, University of Manchester, and NIHR Biomedical Research Centre, Manchester, United Kingdom; Monasterium Laboratory, Muenster, Germany.
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47
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Vogt A, Constantinou A, Rancan F, Ghoreschi K, Blume-Peytavi U, Combadiere B. A niche in the spotlight: Could external factors critically disturb hair follicle homeostasis and contribute to inflammatory hair follicle diseases? Exp Dermatol 2020; 29:1080-1087. [PMID: 33090548 DOI: 10.1111/exd.14212] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 10/01/2020] [Indexed: 12/22/2022]
Abstract
The anatomy of the hair follicle and the dynamics of its barrier provide a special space for interactions between macromolecules and the underlying tissue. Translocation across the hair follicle epithelium and immune recognition have been confirmed for proteins, nucleic acids, engineered particles, virus particles and others. Tissue responses can be modulated by pro-inflammatory stimuli as demonstrated in penetration and transcutaneous immunization studies. Even under physiological conditions, hair follicle openings are filled with exogenous material ranging from macromolecules, engineered particles to natural particles including diverse communities of microbes. The exposed position of the infundibulum suggests that local inflammatory insults could disturb the finely tuned balance and may trigger downstream responses that initiate or facilitate local outbreaks of inflammatory hair diseases typically occurring in close spatial association with the infundibulum as observed in cicatricial alopecia. The question as to how microbial colonization or deposition of contaminants on the surface of the hair follicle epithelium interact with the barrier status under the influence of individual predisposition, may help us understand local flare-ups of inflammatory hair diseases. Specifically, learning more about skin barrier alterations in the different types of inflammatory hair diseases and cross-talk with exogenous compounds could give new insights in this less explored aspect of hair follicle homeostasis. Such knowledge may not only be used to develop supportive measures to maintain a healthy scalp. It may have wider implications for our understanding on how external factors influence inflammation and immunological responses in the skin.
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Affiliation(s)
- Annika Vogt
- Department of Dermatology, Venerology and Allergy, Charité-Universitatsmedizin Berlin, Freie Universitaet Berlin, Humboldt-Universitaet zu Berlin, Berlin Institute of Health, Berlin, Germany
- Sorbonne Université, Inserm Immunologie et des Maladies Infectieuses (Cimi-Paris), Centre, Paris, France
| | - Andria Constantinou
- Department of Dermatology, Venerology and Allergy, Charité-Universitatsmedizin Berlin, Freie Universitaet Berlin, Humboldt-Universitaet zu Berlin, Berlin Institute of Health, Berlin, Germany
| | - Fiorenza Rancan
- Department of Dermatology, Venerology and Allergy, Charité-Universitatsmedizin Berlin, Freie Universitaet Berlin, Humboldt-Universitaet zu Berlin, Berlin Institute of Health, Berlin, Germany
| | - Kamran Ghoreschi
- Department of Dermatology, Venerology and Allergy, Charité-Universitatsmedizin Berlin, Freie Universitaet Berlin, Humboldt-Universitaet zu Berlin, Berlin Institute of Health, Berlin, Germany
| | - Ulrike Blume-Peytavi
- Department of Dermatology, Venerology and Allergy, Charité-Universitatsmedizin Berlin, Freie Universitaet Berlin, Humboldt-Universitaet zu Berlin, Berlin Institute of Health, Berlin, Germany
| | - Behazine Combadiere
- Sorbonne Université, Inserm Immunologie et des Maladies Infectieuses (Cimi-Paris), Centre, Paris, France
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48
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Gaffal E. Focus theme issue: Celebrating the ADF-EXD partnership: A look back into the future of experimental dermatology. Exp Dermatol 2020; 29:1036-1038. [PMID: 32935364 DOI: 10.1111/exd.14190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Evelyn Gaffal
- Department of Dermatology, University Hospital of Magdeburg, Magdeburg, Germany
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49
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Bertolini M, McElwee K, Gilhar A, Bulfone‐Paus S, Paus R. Hair follicle immune privilege and its collapse in alopecia areata. Exp Dermatol 2020; 29:703-725. [DOI: 10.1111/exd.14155] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/18/2020] [Accepted: 07/10/2020] [Indexed: 12/11/2022]
Affiliation(s)
| | - Kevin McElwee
- Monasterium Laboratory Münster Germany
- Centre for Skin Sciences University of Bradford Bradford UK
- Department of Dermatology and Skin Science University of British Columbia Vancouver British Columbia Canada
| | - Amos Gilhar
- Laboratory for Skin Research Rappaport Faculty of Medicine Technion‐Israel Institute of Technology Haifa Israel
| | - Silvia Bulfone‐Paus
- Monasterium Laboratory Münster Germany
- Centre for Dermatology Research University of Manchester and NIHR Manchester Biomedical Research Centre Manchester UK
| | - Ralf Paus
- Monasterium Laboratory Münster Germany
- Centre for Dermatology Research University of Manchester and NIHR Manchester Biomedical Research Centre Manchester UK
- Dr. Philip Frost Department of Dermatology & Cutaneous Surgery University of Miami Miller School of Medicine Miami FL USA
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50
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Filaire E, Dreux A, Boutot C, Ranouille E, Berthon JY. Characteristics of healthy and androgenetic alopecia scalp microbiome: Effect of Lindera strychnifolia roots extract as a natural solution for its modulation. Int J Cosmet Sci 2020; 42:615-621. [PMID: 32803888 DOI: 10.1111/ics.12657] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 06/20/2020] [Accepted: 08/10/2020] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The human scalp harbours a vast community of microbiotal mutualists. Androgenetic alopecia (AGA), the most common form of hair loss in males, is a multifactorial condition involving genetic predisposition and hormonal changes. The role of microflora during hair loss remains to be understood. After having characterized the scalp microbiota of 12 healthy male subjects and 12 AGA male subjects (D0), the aim of this investigation was to evaluate the capacity of Lindera strychnifolia root extract (LsR) to restore a healthy bacterial and fungal scalp microflora after 83 days (D83) of treatment. MATERIAL AND METHODS The strategy used was based on high-throughput DNA sequencing targeting the encoding 16S ribosomal RNA for bacteria and Internal Transcribed Spacer 1 ribosomal DNA for fungi. RESULTS Test analysis of relative abundance comparing healthy and AGA subjects showed a significant increase of Cutibacterim acnes (P < 0.05) and Stenotrophomonas geniculata (P < 0.01) in AGA subjects. AGA scalp condition was also associated with a significant (P < 0.05) decrease of Staphylococcus epidermidis relative abundance. A lower proportion of Malassezia genus in samples corresponding to AGA scalps and an increase of other bacterial genera (Wallemia, Eurotium) were also noted. At the species level, mean relative abundance of Malassezia restricta and Malassezia globosa were significantly lower (P < 0.05) in the AGA group. Eighty-three days of treatment induced a significant decrease in the relative abundance of C. acnes (P < 0.05) and S. geniculata (P < 0.01). S. epidermidis increased significantly (P < 0.05). At the same time, LsR treatment induced a significant increase in the proportion of M. restricta and M. globosa (P < 0.05). CONCLUSION Data from sequencing profiling of the scalp microbiota strongly support a different microbial composition of scalp between control and AGA populations. Findings suggest that LsR extract may be a potential remedy for scalp microbiota re-equilibrium.
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Affiliation(s)
- E Filaire
- Greentech, Biopôle Clermont-Limagne, Saint-Beauzire, 63360, France.,UMR 1019 INRA-UcA, UNH (Human Nutrition Unity), ECREIN Team, University Clermont Auvergne, Clermont-Ferrand, 63000, France
| | - A Dreux
- Greentech, Biopôle Clermont-Limagne, Saint-Beauzire, 63360, France
| | - C Boutot
- Greentech, Biopôle Clermont-Limagne, Saint-Beauzire, 63360, France
| | - E Ranouille
- Greentech, Biopôle Clermont-Limagne, Saint-Beauzire, 63360, France
| | - J Y Berthon
- Greentech, Biopôle Clermont-Limagne, Saint-Beauzire, 63360, France
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