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Chen SD, Chu CY, Wang CB, Yang Y, Xu ZY, Qu YL, Man Y. Integrated-omics profiling unveils the disparities of host defense to ECM scaffolds during wound healing in aged individuals. Biomaterials 2024; 311:122685. [PMID: 38944969 DOI: 10.1016/j.biomaterials.2024.122685] [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: 02/05/2024] [Revised: 06/11/2024] [Accepted: 06/23/2024] [Indexed: 07/02/2024]
Abstract
Extracellular matrix (ECM) scaffold membranes have exhibited promising potential to better the outcomes of wound healing by creating a regenerative microenvironment around. However, when compared to the application in younger individuals, the performance of the same scaffold membrane in promoting re-epithelialization and collagen deposition was observed dissatisfying in aged mice. To comprehensively explore the mechanisms underlying this age-related disparity, we conducted the integrated analysis, combing single-cell RNA sequencing (scRNA-Seq) with spatial transcriptomics, and elucidated six functionally and spatially distinctive macrophage groups and lymphocytes surrounding the ECM scaffolds. Through intergroup comparative analysis and cell-cell communication, we characterized the dysfunction of Spp1+ macrophages in aged mice impeded the activation of the type Ⅱ immune response, thus inhibiting the repair ability of epidermal cells and fibroblasts around the ECM scaffolds. These findings contribute to a deeper understanding of biomaterial applications in varied physiological contexts, thereby paving the way for the development of precision-based biomaterials tailored specifically for aged individuals in future therapeutic strategies.
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Affiliation(s)
- Shuai-Dong Chen
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Chen-Yu Chu
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Chen-Bing Wang
- College & Hospital of Stomatology, Anhui Medical University, Key Lab. of Oral Diseases Research of Anhui Province, Hefei, 230032, China
| | - Yang Yang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Zhao-Yu Xu
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Yi-Li Qu
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Yi Man
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, China.
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Huang C, Liu S, Li W, Zhao S, Ren X, Zhuo F, Zhang K, Li X, Wu J, Zhu Z, Chen C, Zhang W, Yu B. Paxbp1 is indispensable for the maintenance of epidermal homeostasis. J Invest Dermatol 2024:S0022-202X(24)02077-3. [PMID: 39236903 DOI: 10.1016/j.jid.2024.08.012] [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: 01/25/2024] [Revised: 08/08/2024] [Accepted: 08/09/2024] [Indexed: 09/07/2024]
Abstract
The mammalian epidermis is a structurally complex tissue that serves critical barrier functions, safeguarding the organism from the external milieu. The development of the epidermis is governed by sophisticated regulatory processes. However, the precise mechanism maintaining epidermal homeostasis remains incompletely elucidated. Recent studies have identified Paxbp1, an evolutionarily conserved protein, as being involved in the developmental regulation of various cells, tissues, and organs. Nonetheless, its role in skin development has not been explored. Here, we report that the targeted deletion of Paxbp1 in epidermal keratinocytes mediated by Keratin14-Cre leads to severe disruption in skin architecture. Mice deficient in Paxbp1 exhibited a substantially reduced epidermal thickness and pronounced separation at the dermo-epidermal junction upon birth. Mechanistically, we demonstrate that the absence of Paxbp1 hinders cellular proliferation, marked by a halt in cell cycle transition, suppressed gene expression of proliferation, and a compromised DNA replication pathway in basal keratinocytes, resulting in the thinning of the skin epidermis. Moreover, molecules and pathways associated with hemidesmosome assembly were impaired in Paxbp1-deficient keratinocytes, culminating in the detachment of the skin epidermal layer. Therefore, our study highlights an indispensable role of Paxbp1 in the maintenance of epidermal homeostasis.
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Affiliation(s)
- Cong Huang
- Department of Dermatology, Peking University Shenzhen Hospital; Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center; Shenzhen Dermatological Research Support Platform for Molecular Diagnosis, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center, Shenzhen 518036, Guangdong Province, China
| | - Shenglin Liu
- Key Laboratory of Research and Utilization of Ethnomedicinal Plant Resources of Hunan Province, College of Biological and Food Engineering, Huaihua University, Huaihua 418008, Hunan Province, China
| | - Wenting Li
- Department of Dermatology, Peking University Shenzhen Hospital; Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center; Shenzhen Dermatological Research Support Platform for Molecular Diagnosis, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center, Shenzhen 518036, Guangdong Province, China
| | - Shizheng Zhao
- Shenzhen Peking University-the Hong Kong University of Science and Technology Medical Center, Shenzhen 518036, China
| | - Xuanyao Ren
- Department of Dermatology, Peking University Shenzhen Hospital; Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center; Shenzhen Dermatological Research Support Platform for Molecular Diagnosis, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center, Shenzhen 518036, Guangdong Province, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Fan Zhuo
- Department of Dermatology, Peking University Shenzhen Hospital; Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center; Shenzhen Dermatological Research Support Platform for Molecular Diagnosis, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center, Shenzhen 518036, Guangdong Province, China
| | - Kaoyuan Zhang
- Department of Dermatology, Peking University Shenzhen Hospital; Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center; Shenzhen Dermatological Research Support Platform for Molecular Diagnosis, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center, Shenzhen 518036, Guangdong Province, China
| | - Xiahong Li
- Department of Dermatology, Peking University Shenzhen Hospital; Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center; Shenzhen Dermatological Research Support Platform for Molecular Diagnosis, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center, Shenzhen 518036, Guangdong Province, China
| | - Jingwen Wu
- Department of Dermatology, Peking University Shenzhen Hospital; Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center; Shenzhen Dermatological Research Support Platform for Molecular Diagnosis, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center, Shenzhen 518036, Guangdong Province, China
| | - Zimo Zhu
- Department of Dermatology, Peking University Shenzhen Hospital; Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center; Shenzhen Dermatological Research Support Platform for Molecular Diagnosis, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center, Shenzhen 518036, Guangdong Province, China
| | - Chao Chen
- Department of Dermatology, Peking University Shenzhen Hospital; Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center; Shenzhen Dermatological Research Support Platform for Molecular Diagnosis, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center, Shenzhen 518036, Guangdong Province, China
| | - Wei Zhang
- Department of Dermatology, Peking University Shenzhen Hospital; Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center; Shenzhen Dermatological Research Support Platform for Molecular Diagnosis, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center, Shenzhen 518036, Guangdong Province, China
| | - Bo Yu
- Department of Dermatology, Peking University Shenzhen Hospital; Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center; Shenzhen Dermatological Research Support Platform for Molecular Diagnosis, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center, Shenzhen 518036, Guangdong Province, China.
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Zhou R, Wang Q, Zeng S, Liang Y, Wang D. METTL14-mediated N6-methyladenosine modification of Col17a1/Itgα6/Itgβ4 governs epidermal homeostasis. J Dermatol Sci 2023; 112:138-147. [PMID: 37951776 DOI: 10.1016/j.jdermsci.2023.10.005] [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: 06/13/2023] [Revised: 09/30/2023] [Accepted: 10/24/2023] [Indexed: 11/14/2023]
Abstract
BACKGROUND N6-methyladenosine (m6A) is the most abundant and reversible modification occurring in eukaryotic mRNAs, however, its functions in mammalian epidermal development are still not fully elucidated. OBJECTIVE To explore the role of METTL14 (Methyltransferase like 14), one of the m6A methyltransferases, in maintaining epidermal homeostasis. METHODS We constructed mice with Mettl14-inactivation in the epidermal basal cells. The phenotype was explored by H&E staining and immunofluorescence staining. To explore the underlying mechanisms, we performed RNA-seq, Ribosome profiling and MeRIP-seq on wild-type and Mettl14-inactivation epidermal keratinocytes. Moreover, HaCaT cells were used for in vitro validation. RESULTS Inactivation of Mettl14 in murine epidermis led to transient thicker epidermis and exhaustion of the epidermal stem cell pool. Interestingly, we found that the mRNA of type XVII collagen (Col17a1), integrin β4 (Itgβ4) and α6 (Itgα6) had m6A modifications, and the proteins expression were decreased in Mettl14-inactivated epidermis. Furthermore, in epidermis-specific Mettl4-inactivated mice, the epidermis was detached from the dermis and presented a phenotype similar to junctional epidermolysis bullosa (JEB), which may result from hemidesmosomes damage (decrease of COL17A1, ITGB4 and ITGA6). Knockdown of Mettl14 in HaCaT cells impaired the self-renewal and decreased the protein level of COL17A1, ITGB4 and ITGA6 and Itgβ4 knockdown inhibited colony formation. CONCLUSION Our study highlighted the role of METTL14 in the maintenance of epidermal homeostasis and identified its critical role through m6A-mediated translational inhibition of Col17a1, Itgβ4 and Itgα6. Our study suggested that METTL14 may be a potential therapeutic target for the treatment of hemidesmosomes-deficient diseases, such as JEB.
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Affiliation(s)
- Renpeng Zhou
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qirui Wang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Siyi Zeng
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yimin Liang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Danru Wang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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Pfisterer K, Wielscher M, Samardzic D, Weinzettl P, Symmank D, Shaw LE, Campana R, Huang HJ, Farlik M, Bangert C, Vrtala S, Valenta R, Weninger W. Non-IgE-reactive allergen peptides deteriorate the skin barrier in house dust mite-sensitized atopic dermatitis patients. Front Cell Dev Biol 2023; 11:1240289. [PMID: 37675143 PMCID: PMC10478000 DOI: 10.3389/fcell.2023.1240289] [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: 06/14/2023] [Accepted: 08/04/2023] [Indexed: 09/08/2023] Open
Abstract
Atopic dermatitis (AD) is a chronic inflammatory skin disease characterized by type 2 cytokine-driven skin inflammation and epithelial barrier dysfunction. The latter is believed to allow the increased penetration of chemicals, toxins, and allergens into the skin. House dust mite allergens, particularly Der p 2, are important triggers in sensitized individuals with AD; the precise actions of these allergens in epithelial biology remain, however, incompletely understood. In this study, we compared the effects of the protein allergen Der p 2 and a mix of non-IgE-reactive Der p 2 peptides on skin cells using patch tests in AD patients and healthy participants. We then analyzed mRNA expression profiles of keratinocytes by single-cell RNA-sequencing. We report that existing barrier deficiencies in the non-lesional skin of AD patients allow deep penetration of Der p 2 and its peptides, leading to local microinflammation. Der p 2 protein specifically upregulated genes involved in the innate immune system, stress, and danger signals in suprabasal KC. Der p 2 peptides further downregulated skin barrier genes, in particular the expression of genes involved in cell-matrix and cell-cell adhesion. Peptides also induced genes involved in hyperproliferation and caused disturbances in keratinocyte differentiation. Furthermore, inflammasome-relevant genes and IL18 were overexpressed, while KRT1 was downregulated. Our data suggest that Der p 2 peptides contribute to AD initiation and exacerbation by augmenting hallmark features of AD, such as skin inflammation, barrier disruption, and hyperplasia of keratinocytes.
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Affiliation(s)
- Karin Pfisterer
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Matthias Wielscher
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - David Samardzic
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Pauline Weinzettl
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Dorte Symmank
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Lisa E. Shaw
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Raffaela Campana
- Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, Vienna, Austria
| | - Huey-Jy Huang
- Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, Vienna, Austria
- Karl Landsteiner University of Health Sciences, Krems, Austria
| | - Matthias Farlik
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Christine Bangert
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Susanne Vrtala
- Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, Vienna, Austria
| | - Rudolf Valenta
- Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, Vienna, Austria
| | - Wolfgang Weninger
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
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Hiroyasu S, Tsuruta D. Stabilization of Hemidesmosomal Proteins: A Possible Key Contributor to Wnt/β-Catenin Pathway Action in the Skin. J Invest Dermatol 2021; 142:1514-1516. [PMID: 34911646 DOI: 10.1016/j.jid.2021.11.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 11/17/2021] [Accepted: 11/17/2021] [Indexed: 11/29/2022]
Abstract
Recently, accumulating evidence showed that collagen XVII, a transmembrane protein in hemidesmosomes, exhibits essential roles not only in cellular attachment but also in motility and development. Kosumi et al. determined that collagen XVII is stabilized by activated Wnt/β-catenin signaling. This novel mechanism of collagen XVII stabilization through the Wnt/β-catenin pathway may be involved in physiological or pathological events in the skin.
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Affiliation(s)
- Sho Hiroyasu
- Department of Dermatology, Osaka City University Graduate School of Medicine, Osaka, Japan.
| | - Daisuke Tsuruta
- Department of Dermatology, Osaka City University Graduate School of Medicine, Osaka, Japan
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