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Ruchti F, Zwicky P, Becher B, Dubrac S, LeibundGut-Landmann S. Epidermal barrier impairment predisposes for excessive growth of the allergy-associated yeast Malassezia on murine skin. Allergy 2024; 79:1531-1547. [PMID: 38385963 DOI: 10.1111/all.16062] [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: 10/26/2023] [Revised: 01/15/2024] [Accepted: 01/20/2024] [Indexed: 02/23/2024]
Abstract
BACKGROUND The skin barrier is vital for protection against environmental threats including insults caused by skin-resident microbes. Dysregulation of this barrier is a hallmark of atopic dermatitis (AD) and ichthyosis, with variable consequences for host immune control of colonizing commensals and opportunistic pathogens. While Malassezia is the most abundant commensal fungus of the skin, little is known about the host control of this fungus in inflammatory skin diseases. METHODS In this experimental study, MC903-treated mice were colonized with Malassezia spp. to assess the host-fungal interactions in atopic dermatitis. Additional murine models of AD and ichthyosis, including tape stripping, K5-Nrf2 overexpression and flaky tail mice, were employed to confirm and expand the findings. Skin fungal counts were enumerated. High parameter flow cytometry was used to characterize the antifungal response in the AD-like skin. Structural and functional alterations in the skin barrier were determined by histology and transcriptomics of bulk skin. Finally, differential expression of metabolic genes in Malassezia in atopic and control skin was quantified. RESULTS Malassezia grows excessively in AD-like skin. Fungal overgrowth could, however, not be explained by the altered immune status of the atopic skin. Instead, we found that by upregulating key metabolic genes in the altered cutaneous niche, Malassezia acquired enhanced fitness to efficiently colonise the impaired skin barrier. CONCLUSIONS This study provides evidence that structural and metabolic changes in the dysfunctional epidermal barrier environment provide increased accessibility and an altered lipid profile, to which the lipid-dependent yeast adapts for enhanced nutrient assimilation. Our findings reveal fundamental insights into the implication of the mycobiota in the pathogenesis of common skin barrier disorders.
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Affiliation(s)
- Fiorella Ruchti
- Section of Immunology, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland
- Institute of Experimental Immunology, University of Zürich, Zürich, Switzerland
| | - Pascale Zwicky
- Institute of Experimental Immunology, University of Zürich, Zürich, Switzerland
| | - Burkhard Becher
- Institute of Experimental Immunology, University of Zürich, Zürich, Switzerland
| | - Sandrine Dubrac
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | - Salomé LeibundGut-Landmann
- Section of Immunology, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland
- Institute of Experimental Immunology, University of Zürich, Zürich, Switzerland
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2
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Ye JH, Chen YL, Ogg G. CD1a and skin T cells: a pathway for therapeutic intervention. Clin Exp Dermatol 2024; 49:450-458. [PMID: 38173286 PMCID: PMC11037390 DOI: 10.1093/ced/llad460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/28/2023] [Accepted: 12/22/2023] [Indexed: 01/05/2024]
Abstract
The CD1 and MR1 protein families present lipid antigens and small molecules to T cells, complementing well-studied major histocompatibility complex-peptide mechanisms. The CD1a subtype is highly and continuously expressed within the skin, most notably on Langerhans cells, and has been demonstrated to present self and foreign lipids to T cells, highlighting its cutaneous sentinel role. Alteration of CD1a-dependent T-cell responses has recently been discovered to contribute to the pathogenesis of several inflammatory skin diseases. In this review, we overview the structure and role of CD1a and outline the current evidence implicating CD1a in the development of psoriasis, atopic dermatitis and allergic contact dermatitis.
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Affiliation(s)
- John H Ye
- MRC Translational Immune Discovery Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Yi-Ling Chen
- MRC Translational Immune Discovery Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
- Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
| | - Graham Ogg
- MRC Translational Immune Discovery Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
- Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
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3
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Cha J, Kim TG, Bhae E, Gwak HJ, Ju Y, Choe YH, Jang IH, Jung Y, Moon S, Kim T, Lee W, Park JS, Chung YW, Yang S, Kang YK, Hyun YM, Hwang GS, Lee WJ, Rho M, Ryu JH. Skin microbe-dependent TSLP-ILC2 priming axis in early life is co-opted in allergic inflammation. Cell Host Microbe 2024; 32:244-260.e11. [PMID: 38198924 DOI: 10.1016/j.chom.2023.12.006] [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: 11/13/2022] [Revised: 09/17/2023] [Accepted: 12/12/2023] [Indexed: 01/12/2024]
Abstract
Although early life colonization of commensal microbes contributes to long-lasting immune imprinting in host tissues, little is known regarding the pathophysiological consequences of postnatal microbial tuning of cutaneous immunity. Here, we show that postnatal exposure to specific skin commensal Staphylococcus lentus (S. lentus) promotes the extent of atopic dermatitis (AD)-like inflammation in adults through priming of group 2 innate lymphoid cells (ILC2s). Early postnatal skin is dynamically populated by discrete subset of primed ILC2s driven by microbiota-dependent induction of thymic stromal lymphopoietin (TSLP) in keratinocytes. Specifically, the indole-3-aldehyde-producing tryptophan metabolic pathway, shared across Staphylococcus species, is involved in TSLP-mediated ILC2 priming. Furthermore, we demonstrate a critical contribution of the early postnatal S. lentus-TSLP-ILC2 priming axis in facilitating AD-like inflammation that is not replicated by later microbial exposure. Thus, our findings highlight the fundamental role of time-dependent neonatal microbial-skin crosstalk in shaping the threshold of innate type 2 immunity co-opted in adulthood.
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Affiliation(s)
- Jimin Cha
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Tae-Gyun Kim
- Department of Dermatology, Severance Hospital, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul 03722, Korea; Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Euihyun Bhae
- Department of Artificial Intelligence, Hanyang University, Seoul 04763, Korea
| | - Ho-Jin Gwak
- Department of Computer Science, Hanyang University, Seoul 04763, Korea
| | - Yeajin Ju
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul 03759, Korea
| | - Young Ho Choe
- Department of Anatomy and Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea
| | - In-Hwan Jang
- National Creative Research Initiative Center for Hologenomics and School of Biological Sciences, Seoul National University, Seoul 08826, Korea
| | - Youngae Jung
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul 03759, Korea
| | - Sungmin Moon
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Taehyun Kim
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Wuseong Lee
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Jung Sun Park
- Development and Differentiation Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Youn Wook Chung
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Siyoung Yang
- Department of Biological Sciences, Sungkyunkwan University, Suwon 16419, Korea
| | - Yong-Kook Kang
- Development and Differentiation Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Young-Min Hyun
- Department of Anatomy and Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Geum-Sook Hwang
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul 03759, Korea; College of Pharmacy, Chung-Ang University, Seoul 06974, Korea
| | - Won-Jae Lee
- National Creative Research Initiative Center for Hologenomics and School of Biological Sciences, Seoul National University, Seoul 08826, Korea
| | - Mina Rho
- Department of Computer Science, Hanyang University, Seoul 04763, Korea; Department of Biomedical Informatics, Hanyang University, Seoul 04763, Korea
| | - Ji-Hwan Ryu
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea.
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4
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Zheng R, Ren Y, Liu X, He C, Liu H, Wang Y, Li J, Xia S, Liu Z, Ma Y, Wang D, Xu S, Wang G, Li N. Exogenous drugs-induced mouse models of atopic dermatitis. Cytokine Growth Factor Rev 2024:S1359-6101(24)00003-0. [PMID: 38272716 DOI: 10.1016/j.cytogfr.2024.01.003] [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: 01/02/2024] [Accepted: 01/09/2024] [Indexed: 01/27/2024]
Abstract
Atopic dermatitis (AD) is an inflammatory skin disease characterized by intense pruritus. AD is harmful to both children and adults, but its pathogenic mechanism has yet to be fully elucidated. The development of mouse models for AD has greatly contributed to its study and treatment. Among these models, the exogenous drug-induced mouse model has shown promising results and significant advantages. Until now, a large amount of AD-related research has utilized exogenous drug-induced mouse models, leading to notable advancements in research. This indicates the crucial significance of applying such models in AD research. These models exhibit diverse characteristics and are highly complex. They involve the use of various strains of mice, diverse types of inducers, and different modeling effects. However, there is currently a lack of comprehensive comparative studies on exogenous drug-induced AD mouse models, which hinders researchers' ability to choose among these models. This paper provides a comprehensive review of the features and mechanisms associated with various exogenous drug-induced mouse models, including the important role of each cytokine in AD development. It aims to assist researchers in quickly understanding models and selecting the most suitable one for further investigation.
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Affiliation(s)
- Rou Zheng
- Health Science Center, Ningbo University, Ningbo, China.
| | - Yan Ren
- Health Science Center, Ningbo University, Ningbo, China.
| | - Xinyue Liu
- Health Science Center, Ningbo University, Ningbo, China.
| | - Canxia He
- Health Science Center, Ningbo University, Ningbo, China.
| | - Hua Liu
- Health Science Center, Ningbo University, Ningbo, China.
| | - Yixuan Wang
- Health Science Center, Ningbo University, Ningbo, China.
| | - Jianing Li
- Health Science Center, Ningbo University, Ningbo, China.
| | - Shuya Xia
- Health Science Center, Ningbo University, Ningbo, China.
| | - Zhifang Liu
- Department of Dermatology, the First Affiliated Hospital of Ningbo University, Ningbo, China.
| | - Yizhao Ma
- Department of Dermatology, the First Affiliated Hospital of Ningbo University, Ningbo, China.
| | - Dianchen Wang
- Department of Dermatology, the First Affiliated Hospital of Ningbo University, Ningbo, China.
| | - Suling Xu
- Department of Dermatology, the First Affiliated Hospital of Ningbo University, Ningbo, China.
| | - Geng Wang
- Health Science Center, Ningbo University, Ningbo, China.
| | - Na Li
- Health Science Center, Ningbo University, Ningbo, China; Department of Dermatology, the First Affiliated Hospital of Ningbo University, Ningbo, China.
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5
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Luo M, Su HC, Lin JE, Zhu CH, Lin LH, Han Y. A Retrospective Analysis of Risk Factors for Atopic Dermatitis Severity. Dermatitis 2024; 35:S81-S90. [PMID: 37126941 DOI: 10.1089/derm.2023.0037] [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: 05/03/2023]
Abstract
Background: Atopic dermatitis (AD) has the highest burden of any skin disease; however, the severity-associated factors remain unclear. Objective: To evaluate potential severity-associated factors of AD and to design and validate a severity prediction model to inform the management of AD patients. Methods: A cross-sectional study of 900 AD patients was conducted from December 2021 to October 2022 at our hospital. The primary outcome was disease severity, categorized as mild, moderate, or severe using the scoring atopic dermatitis index. Ordinal logistic regression and bootstrapped validation were used to derive and internally validate the model. Results: Increasing age, elevated eosinophil level, higher economic status, and urban residence were associated with severe AD. Breastfeeding, disinfectants and topical emollients use, and short duration of bathing were associated with mild AD. In the prediction model, predictors included age, eosinophil and economic status, residence, feeding, disinfectants and emollients use, and duration of bathing. Prediction models demonstrated good discrimination (bias-corrected concordance index [c-index] = 0.72) and good calibration. Conclusion: Risk factors for the severity of AD were identified that could aid the early prediction of AD progression. The predictive model included variables that are easily evaluated and could inform personalized prevention and therapy.
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Affiliation(s)
- Min Luo
- From the Department of Dermatology, the Union Hospital, Fujian Medical University, Fuzhou, P.R. China
| | - Huichun C Su
- From the Department of Dermatology, the Union Hospital, Fujian Medical University, Fuzhou, P.R. China
| | - Jinger E Lin
- From the Department of Dermatology, the Union Hospital, Fujian Medical University, Fuzhou, P.R. China
| | - Changhua H Zhu
- From the Department of Dermatology, the Union Hospital, Fujian Medical University, Fuzhou, P.R. China
| | - Lihang H Lin
- From the Department of Dermatology, the Union Hospital, Fujian Medical University, Fuzhou, P.R. China
| | - Yue Han
- From the Department of Dermatology, the Union Hospital, Fujian Medical University, Fuzhou, P.R. China
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6
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Zheng C, Cao T, Ye C, Zou Y. Neutrophil recruitment by CD4 tissue-resident memory T cells induces chronic recurrent inflammation in atopic dermatitis. Clin Immunol 2023; 256:109805. [PMID: 37832861 DOI: 10.1016/j.clim.2023.109805] [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: 08/13/2023] [Revised: 09/18/2023] [Accepted: 10/07/2023] [Indexed: 10/15/2023]
Abstract
BACKGROUND Atopic dermatitis (AD) is a chronic inflammatory skin disease that continues to impose significant physical, mental, and economic burdens on patients. Recent research has suggested the significant role of tissue-resident memory (TRM) cells in AD. However, the precise role and mechanisms of action of TRM cells in AD remain unclear. A deeper understanding of the involvement of TRM cells in AD will unveil promising pathways for future innovative therapeutic strategies. METHODS To investigate the involvement of TRM cells in AD, we used diverse mouse models and employed experimental techniques to manipulate cell formation and depletion. We assessed the inflammatory response by analyzing mouse ear phenotype, measuring ear thickness, and performing hematoxylin and eosin staining. Flow cytometry and immunofluorescence staining were used to identify different cell types and evaluate changes in cell quantity. Additionally, we used qPCR to analyze gene expression of relevant chemokines and cytokines. RESULTS Our study revealed the presence of TRM cells in the skin after exposure to calcipotriol. After a 24-h re-challenge, we observed substantial neutrophil infiltration into the previously irritated skin. Neutrophil depletion prior to re-challenge effectively prevented early flare-up responses during AD recurrence. Furthermore, we demonstrate that CD4+TRM cells upregulate expression of cytokines INF-γ and TNF-α, which may induce the expression of CXCL1, thereby recruiting neutrophils and contributing to the chronic recurrent inflammation observed in AD. CONCLUSIONS We have established a novel, chronic recurrent mouse model for investigating TRM cells in AD. Our findings demonstrate that CD4+TRM cells in the skin mediate early flare-up response during AD recurrence and influence the chronic recurrent inflammation of AD by recruiting neutrophils. Targeting CD4+TRM cells may represent a promising approach for the treatment of chronic recurrent inflammation in AD.
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Affiliation(s)
- Chunjiao Zheng
- Skin and Cosmetic Research Department, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, China
| | - Ting Cao
- Skin and Cosmetic Research Department, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, China
| | - Chengbin Ye
- Skin and Cosmetic Research Department, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, China
| | - Ying Zou
- Skin and Cosmetic Research Department, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, China.
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7
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Umehara Y, Trujillo-Paez JV, Yue H, Peng G, Nguyen HLT, Okumura K, Ogawa H, Niyonsaba F. Calcitriol, an Active Form of Vitamin D3, Mitigates Skin Barrier Dysfunction in Atopic Dermatitis NC/Nga Mice. Int J Mol Sci 2023; 24:ijms24119347. [PMID: 37298299 DOI: 10.3390/ijms24119347] [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: 04/19/2023] [Revised: 05/23/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023] Open
Abstract
Atopic dermatitis and psoriasis are prevalent chronic inflammatory skin diseases that are characterized by dysfunctional skin barriers and substantially impact patients' quality of life. Vitamin D3 regulates immune responses and keratinocyte differentiation and improves psoriasis symptoms; however, its effects on atopic dermatitis remain unclear. Here, we investigated the effects of calcitriol, an active form of vitamin D3, on an NC/Nga mouse model of atopic dermatitis. We observed that the topical application of calcitriol decreased the dermatitis scores and epidermal thickness of NC/Nga mice with atopic dermatitis compared to untreated mice. In addition, both stratum corneum barrier function as assessed by the measurement of transepidermal water loss and tight junction barrier function as evaluated by biotin tracer permeability assay were improved following calcitriol treatment. Moreover, calcitriol treatment reversed the decrease in the expression of skin barrier-related proteins and decreased the expression of inflammatory cytokines such as interleukin (IL)-13 and IL-33 in mice with atopic dermatitis. These findings suggest that the topical application of calcitriol might improve the symptoms of atopic dermatitis by repairing the dysfunctional epidermal and tight junction barriers. Our results suggest that calcitriol might be a viable therapeutic agent for the treatment of atopic dermatitis in addition to psoriasis.
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Affiliation(s)
- Yoshie Umehara
- Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | | | - Hainan Yue
- Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
- Department of Dermatology and Allergology, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - Ge Peng
- Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
- Department of Dermatology and Allergology, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - Hai Le Thanh Nguyen
- Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
- Department of Dermatology and Allergology, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - Ko Okumura
- Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - Hideoki Ogawa
- Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - François Niyonsaba
- Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
- Faculty of International Liberal Arts Global Health Studies, Juntendo University, Tokyo 113-8421, Japan
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8
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Jiang X, Liu Z, Ma Y, Miao L, Zhao K, Wang D, Wang M, Ruan H, Xu F, Zhou Q, Xu S. Fecal microbiota transplantation affects the recovery of AD-skin lesions and enhances gut microbiota homeostasis. Int Immunopharmacol 2023; 118:110005. [PMID: 36924566 DOI: 10.1016/j.intimp.2023.110005] [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: 10/20/2022] [Revised: 02/21/2023] [Accepted: 03/06/2023] [Indexed: 03/15/2023]
Abstract
BACKGROUND Accumulating evidence has shown that gut microbiota plays a key role in the progression of atopic dermatitis (AD). Fecal microbiota transplantation (FMT), as an effective method to restore gut microbiota homeostasis, has been successfully applied for treating many inflammatory diseases. However, the therapeutic effect of FMT on AD remains unclear. The following study examined the effect and mechanism of FMT on AD-skin lesions in an AD mouse model. METHODS In this study, we exposed the shaved back skin of BALB/c mice to calcipotriol (MC903) to induce AD model. Mice were then treated with FMT, which was performed with gut microbiota from healthy mice. The gut microbiota of treated mice was tracked by 16S rRNA gene sequencing. Mice skin tissues were examined by histopathology and inflammatory cytokines change in serum by ELISA. RESULTS FMT had a faster trend on the reversion of the increases in skin epidermal layer thicknesses and suppressed some of the representative inflammatory cytokines. The gut microbial community in the natural recovery process varied significantly in the FMT group at day 7 (ANOSIM P = 0.0229, r = 0.2593). Notably, FMT had a long-lasting and beneficial impact on the gut microbial compositions of AD mice by increasing the ratio of Firmicutes to Bacteroidetes and the amount of butyric-producing bacteria (BPB), including Erysipelotrichaceae, Lactobacillaceae, and Eubacteriacea. Furthermore, the relative abundances of gut microbiota-mediated functional pathways involved in the cell growth and death, amino acid, energy, lipid, and carbohydrate metabolisms, and immune system increased after FMT treatment. CONCLUSION FMT modulated the gut microbiota homeostasis and affected the recovery from AD-related inflammations, suggesting that it could be used as a treatment strategy for AD patients in the clinic.
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Affiliation(s)
- Xinyu Jiang
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo 315020, Zhejiang, China; Health Science Center, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Zhifang Liu
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo 315020, Zhejiang, China; Health Science Center, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Yizhao Ma
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo 315020, Zhejiang, China; Health Science Center, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Linlin Miao
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo 315020, Zhejiang, China; Health Science Center, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Keyu Zhao
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo 315020, Zhejiang, China; Health Science Center, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Dianchen Wang
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo 315020, Zhejiang, China; Health Science Center, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Mengmeng Wang
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo 315020, Zhejiang, China; Health Science Center, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Hongyu Ruan
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo 315020, Zhejiang, China; Health Science Center, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Feng Xu
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo 315020, Zhejiang, China
| | - Qiongyan Zhou
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo 315020, Zhejiang, China
| | - Suling Xu
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo 315020, Zhejiang, China.
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9
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Abstract
Atopic dermatitis (AD) is a chronic, relapsing, and extremely pruritic inflammatory skin disease with a particular impact on children. AD pathogenesis is not yet fully understood, and there is no curative treatment for this disease. Therefore, several genetically or chemically-induced AD mouse models have been developed. These preclinical mouse models are an indispensable research tool for studying AD pathogenesis and evaluating the efficacy of new candidate AD therapeutics. A commonly used mouse model of AD has been developed using the topical application of a low-calcemic analog of vitamin D3, MC903, to induce AD-like inflammatory phenotypes that closely resemble human AD. Moreover, this model shows a minimal effect on systemic calcium metabolism that is observed in the vitamin D3-induced AD model. Thus, an expanding number of studies use the MC903-induced AD model to interrogate AD pathobiology in vivo and to test new candidate small molecule and monoclonal antibody therapies. This protocol describes in detail functional measurements including the measurement of skin thickness, which is a surrogate marker for ear skin inflammation, as well as itch assessment, histological evaluation to assess the structural changes associated with AD skin inflammation, and preparation of single-cell suspensions from ear skin and draining lymph nodes for the assessment of inflammatory leukocyte subset infiltration in these tissues using flow cytometry. © 2023 The Authors. Current Protocols published by Wiley Periodicals LLC. Basic Protocol: Topical application of MC903 induces AD-like skin inflammation Support Protocol 1: Measurement of ear skin thickness Support Protocol 2: Itch assessment Support Protocol 3: Dissection of ear skin and ear draining lymph nodes Support Protocol 4: Histological evaluation and quantification Support Protocol 5: Preparation of single-cell suspension from ear skin and draining lymph nodes for the assessment of inflammatory immune cell infiltration using flow cytometry.
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Affiliation(s)
- Md Jahangir Alam
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Liang Xie
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Yu-Anne Yap
- Department of Physiology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Remy Robert
- Department of Physiology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
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10
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Keith YH, Honda T, Ono S, Lee B, Shibuya R, Hanakawa S, Ishida Y, Nakamizo S, Kabashima K. Infiltration and local differentiation of bone marrow-derived integrinβ7-positive mast cell progenitors in atopic dermatitis-like skin. J Allergy Clin Immunol 2023; 151:159-171.e8. [PMID: 36122789 DOI: 10.1016/j.jaci.2022.09.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 08/12/2022] [Accepted: 09/07/2022] [Indexed: 02/04/2023]
Abstract
BACKGROUND Mast cells (MCs) are tissue-resident cells with various immunologic functions. MCs are increased in atopic dermatitis (AD) skin and can contribute to the inflammation. Although skin MCs are inducible from bone marrow (BM) cells in vitro, they are maintained locally by self-proliferation in the steady state in vivo. However, how skin MCs are increased in AD skin, including the infiltration of BM-derived MC progenitors (MCps) and their differentiation, remains unclear. OBJECTIVE We sought to identify and characterize BM-derived MCps in AD skin. METHODS BM-derived MCps in AD skin were analyzed by flow cytometry using BM-chimeric mice and parabiosis in an MC903-induced AD model. BM-derived MCps in AD-like skin were compared with resident MCs for gene expression by RNA- sequencing analysis. RESULTS We observed local proliferation of resident MCs and an increase in BM-derived MCs in AD-like skin. BM-derived MCs in the skin were derived from circulating MCps and were distinguishable from resident MCs by integrinβ7. RNA- sequence analysis showed that integrinβ7+ MCs (BM-derived MCps) in the skin shared the characteristics of both mucosal-type MCs and connective tissue-type MCs, and increased the expression of genes related to MCp migration. BM-derived MCps proliferated in situ, gradually lost the integrinβ7 expression, and acquired connective tissue-type MC phenotypes during the remission phase of inflammation. CONCLUSIONS BM-derived integrinβ7+ MCps migrate to AD-like skin and contribute to the maintenance of skin MCs.
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Affiliation(s)
- Yuki Honda Keith
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan; Immunology Division, Garvan Institute of Medical Research, Sydney, Australia
| | - Tetsuya Honda
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan; Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu, Japan.
| | - Sachiko Ono
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Bernett Lee
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A∗STAR), Biopolis, Singapore, Singapore; Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - Rintaro Shibuya
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Sho Hanakawa
- Skin Research Institute of Singapore (SRIS), Agency for Science, Technology and Research (A∗STAR), Biopolis, Singapore, Singapore
| | - Yoshihiro Ishida
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Satoshi Nakamizo
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Kenji Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan; Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A∗STAR), Biopolis, Singapore, Singapore; Skin Research Institute of Singapore (SRIS), Agency for Science, Technology and Research (A∗STAR), Biopolis, Singapore, Singapore.
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11
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Lee Y, Oh JH, Li N, Jang HJ, Ahn KS, Oh SR, Lee DH, Chung JH. Topical Skullcapflavone II attenuates atopic dermatitis in a mouse model by directly inhibiting associated cytokines in different cell types. Front Immunol 2022; 13:1064515. [PMID: 36605189 PMCID: PMC9808403 DOI: 10.3389/fimmu.2022.1064515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 12/05/2022] [Indexed: 12/24/2022] Open
Abstract
Skullcapflavone II (SFII), a flavonoid derived from Scutellaria baicalensis, is an anticancer agent. We aimed to validate SFII for atopic dermatitis (AD) therapy by demonstrating the anti-inflammatory effects of SFII in an AD mouse model produced by the topical application of the vitamin D3 analog MC903. We showed that topical treatment with SFII significantly suppressed MC903-induced serum IgE levels compared with topical hydrocortisone (HC) treatment. Topical SFII also prevents MC903-induced pruritus, skin hyperplasia, and inflammatory immune cell infiltration into lesional skin comparable to topical HC. In addition, MC903-induced immune cell chemoattractants and AD-associated cytokine production in skin lesions were effectively suppressed by topical SFII. The production of MC903-induced effector cytokines influencing T helper (Th)2 and Th17 polarization in lesioned skin is significantly inhibited by topical SFII. Furthermore, we showed that SFII can directly inhibit the production of AD-associated cytokines by human primary keratinocytes, mouse bone marrow-derived cells (BMDCs), and mouse CD4+ T cells in vitro. Lastly, we demonstrated that topical SFII more effectively suppressed serum IgE levels, the production of IL-4 and thymic stromal lymphopoietin (TSLP), and infiltration of CD4+ T cells and Gr-1+ cells (neutrophils) into lesion skin compared to topical baicalein (a flavonoid derived from Scutellaria baicalensis), which has anti-inflammatory effects. Taken together, our findings suggest that SFII may have promising therapeutic potential for this complex disease via the regulation of multiple AD-associated targets.
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Affiliation(s)
- Youngae Lee
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea,Institute of Human-Environment Interface Biology, Medical Research Center, Seoul National University, Seoul, Republic of Korea,Laboratory of Cutaneous Aging Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Jang-Hee Oh
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea,Institute of Human-Environment Interface Biology, Medical Research Center, Seoul National University, Seoul, Republic of Korea,Laboratory of Cutaneous Aging Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Na Li
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea,Institute of Human-Environment Interface Biology, Medical Research Center, Seoul National University, Seoul, Republic of Korea,Laboratory of Cutaneous Aging Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea,Department of Biomedical Sciences, Seoul National University Graduate School, Seoul, Republic of Korea
| | - Hyun-Jae Jang
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheong-ju, Chungcheongbuk-do, Republic of Korea
| | - Kyung-Seop Ahn
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheong-ju, Chungcheongbuk-do, Republic of Korea
| | - Sei-Ryang Oh
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheong-ju, Chungcheongbuk-do, Republic of Korea
| | - Dong Hun Lee
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea,Institute of Human-Environment Interface Biology, Medical Research Center, Seoul National University, Seoul, Republic of Korea,Laboratory of Cutaneous Aging Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Jin Ho Chung
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea,Institute of Human-Environment Interface Biology, Medical Research Center, Seoul National University, Seoul, Republic of Korea,Laboratory of Cutaneous Aging Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea,Department of Biomedical Sciences, Seoul National University Graduate School, Seoul, Republic of Korea,*Correspondence: Jin Ho Chung,
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12
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Hou DD, Wang XX, Li SJ, Wang DC, Niu Y, Xu ZR, Jin ZQ. Glycyrrhizic acid suppresses atopic dermatitis-like symptoms by regulating the immune balance. J Cosmet Dermatol 2022; 21:7090-7099. [PMID: 36099014 DOI: 10.1111/jocd.15383] [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: 04/06/2022] [Revised: 08/08/2022] [Accepted: 09/08/2022] [Indexed: 01/06/2023]
Abstract
BACKGROUND Glycyrrhiza is one of the most widely used traditional Chinese medicines in China. Its main bioactive ingredient glycyrrhizic acid (GA) has the potential to be used as a treatment for atopic dermatitis (AD) because it has similar actions to steroids, but with relatively few side effects. AIMS The objective of this study was to explore the potential mechanisms of GA on AD mice model. METHODS Calcipotriol, a vitamin D3 analogue (MC903) was applied topically to establish AD mouse model. Mice were intraperitoneally administrated with 2 mg/kg dexamethasone (DEX), 25 or 50 mg/kg GA for 15 days. After mice were executed, skin tissues were collected and detected the expression levels of IL-4, IFN-γ, TNF-α and thymic stromal lymphopoietin (TSLP). The percentages of Th1, Th2, Th17, langerhans cells (LCs) in draining lymph nodes (dLNs) were measured by flow cytometry. RESULTS Our data demonstrated that GA improved the symptoms of AD by exerting anti-inflammatory and anti-allergic functions in vivo. We found that GA treatment decreased the level of total IgE in serum, suppressed ear swelling, reduced the infiltration of mast cells in skin lesions and decreased expressions of IL-4, IFN-γ, TNF-α and TSLP in skin lesions. Furthermore, our experimental results demonstrated that GA suppressed the Th1/Th2/Th17-immune responses in the dLNs, inhibited the migration of LCs in dLNs. CONCLUSIONS In conclusion, our findings suggested potential therapeutic effects of GA against MC903-induced AD-like skin lesions in mice.
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Affiliation(s)
- Dian-Dong Hou
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, Huzhou University, Huzhou, China
| | - Xin-Xin Wang
- Basic Medical and Forensic Medicine, Baotou Medical College, Baotou, China
| | - Si-Jia Li
- Liaoning University of Traditional Chinese Medicine, Shenyang, China
| | - De-Cheng Wang
- The Second Clinical Medical Institute, Liaoning University of Traditional Chinese Medicine, Shenyang, China
| | - Yuan Niu
- Huzhou University, Huzhou, China
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13
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Ruffles T, Basu K, Inglis SK, Bremner S, Rabe H, Memon A, Seddon P, Tavendale R, Palmer CNA, Mukhopadhyay S, Fidler K. Mannose-binding lectin genotype is associated with respiratory disease in young children: A multicenter cohort study. Pediatr Pulmonol 2022; 57:2824-2833. [PMID: 35949104 DOI: 10.1002/ppul.26109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 08/02/2022] [Accepted: 08/09/2022] [Indexed: 11/12/2022]
Abstract
BACKGROUND Mannose-binding lectin (MBL) is an important component of the innate immune system. Polymorphisms in the MBL2 gene and promoter region are directly associated with MBL-deficiency. We sought to determine the association between MBL genotype on the frequency of common childhood respiratory infections, respiratory symptoms, and atopic outcomes in early childhood. METHODS MBL2 gene variants were analyzed in newborns recruited to the GO-CHILD multicenter prospective cohort study. Follow-up for respiratory infection and atopy diagnoses and symptoms, healthcare utilization, and medication prescription were conducted by postal questionnaires at 12 and 24 months. RESULTS Genotyping and follow-up were completed in 1004 children. Genotypes associated with MBL-deficiency were associated with an increased risk of bronchiolitis (relative risk [RR] 1.95, 95% confidence interval [CI] 1.33-2.85) and pneumonia (RR 2.46, 95% CI 1.16-5.22). MBL-deficient genotypes were associated with an increased risk of wheeze with shortness of breath episodes (RR 1.22, 95% CI 1.04-1.43), emergency department attendance (RR 1.90 95% CI 1.13-3.19), and hospital admission (RR 2.01, 95% CI 1.04-3.89) for wheeze. MBL-deficient genotypes were associated with a reduced risk of developing atopic dermatitis (RR 0.72, 95% CI 0.53-0.98). CONCLUSION The positive association between MBL-deficient genotypes and bronchiolitis and pneumonia, as well as a severe wheeze phenotype in some young children, supports the hypothesis that MBL is an important component of innate immunity in the vulnerable period before the maturation of the adaptive immune system. Identification of disease-modifying genotypes may help target preventative strategies in high-risk infants.
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Affiliation(s)
- Tom Ruffles
- Academic Department of Paediatrics, Royal Alexandra Children's Hospital, University Hospitals Sussex NHS Foundation Trust, Brighton, UK.,Brighton and Sussex Medical School, Brighton, UK
| | - Kaninika Basu
- Academic Department of Paediatrics, Royal Alexandra Children's Hospital, University Hospitals Sussex NHS Foundation Trust, Brighton, UK.,Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Sarah K Inglis
- Tayside Clinical Trials Unit, University of Dundee, Dundee, UK
| | - Stephen Bremner
- Department of Primary Care and Public Health, Brighton and Sussex Medical School, Brighton, UK
| | - Heike Rabe
- Academic Department of Paediatrics, Royal Alexandra Children's Hospital, University Hospitals Sussex NHS Foundation Trust, Brighton, UK.,Brighton and Sussex Medical School, Brighton, UK
| | - Anjum Memon
- Department of Primary Care and Public Health, Brighton and Sussex Medical School, Brighton, UK
| | - Paul Seddon
- Academic Department of Paediatrics, Royal Alexandra Children's Hospital, University Hospitals Sussex NHS Foundation Trust, Brighton, UK.,Brighton and Sussex Medical School, Brighton, UK
| | - Roger Tavendale
- Biomedical Research Institute, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| | - Colin N A Palmer
- Pat McPherson Centre for Pharmacogenetics and Pharmacogenomics, School of Medicine, University of Dundee, Ninewells Hospital and Medical School, Dundee, UK
| | - Somnath Mukhopadhyay
- Academic Department of Paediatrics, Royal Alexandra Children's Hospital, University Hospitals Sussex NHS Foundation Trust, Brighton, UK.,Brighton and Sussex Medical School, Brighton, UK
| | - Katy Fidler
- Academic Department of Paediatrics, Royal Alexandra Children's Hospital, University Hospitals Sussex NHS Foundation Trust, Brighton, UK.,Brighton and Sussex Medical School, Brighton, UK
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14
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Chen X, Zhang Y, Pei J, Zeng X, Yang Y, Zhang Y, Li F, Deng Y. Phellopterin alleviates atopic dermatitis-like inflammation and suppresses IL-4-induced STAT3 activation in keratinocytes. Int Immunopharmacol 2022; 112:109270. [PMID: 36179418 DOI: 10.1016/j.intimp.2022.109270] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/15/2022] [Accepted: 09/20/2022] [Indexed: 11/26/2022]
Abstract
Anti-inflammation medication is one of the most important treatment for people with atopic dermatitis (AD) which presents persistent type 2 inflammation in skin lesions. Interaction between activated keratinocytes and immune cells in AD skin lesions amplifies inflammatory signaling by augmenting production of cytokines, such as keratinocyte-derived thymic stromal lymphopoietin (TSLP) and interleukin-33 (IL-33). Phellopterin is a bioactive compound isolated from ethanol extract of Angelica dahurica root which has been traditionally used for AD therapy in China. In the present study, we showed that Phellopterin possessed anti-type 2 inflammation activity and alleviated AD-like phenotypes including reduction in serum immunoglobulin E (IgE) levels and infiltration of eosinophils and mast cells in the AD-like skin lesions. Further molecular analysis found that Phellopterin suppressed phosphorylation of signal transducer and activator of transcription 3 (STAT3) at Tyr705, and the expression of TSLP and IL-33 in epidermal keratinocytes of AD-like lesions. In vitro studies in cultured human keratinocytes demonstrated that STAT3 was required for interleukin-4 (IL-4)-induced overexpression of TSLP and IL-33. Phellopterin inhibited IL-4-induced activation of STAT3, which leaded to suppress the STAT3-mediated transcription of TSLP and IL-33. Our study suggested that Phellopterin is an active compound with bioactivities of anti- type 2 inflammation and STAT3 inactivation, thus allowing to be a promising candidate for AD topical therapy.
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Affiliation(s)
- Xun Chen
- Engineering Research Center of Sichuan-Tibet Traditional Medicinal Plant, Chengdu University, Chengdu 610106, China; Institute of Cancer Biology and Drug Discovery, Chengdu University, Chengdu 610106, China; School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Yujin Zhang
- Engineering Research Center of Sichuan-Tibet Traditional Medicinal Plant, Chengdu University, Chengdu 610106, China; Institute of Cancer Biology and Drug Discovery, Chengdu University, Chengdu 610106, China; School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Junxia Pei
- Engineering Research Center of Sichuan-Tibet Traditional Medicinal Plant, Chengdu University, Chengdu 610106, China; Institute of Cancer Biology and Drug Discovery, Chengdu University, Chengdu 610106, China; School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Xin Zeng
- Engineering Research Center of Sichuan-Tibet Traditional Medicinal Plant, Chengdu University, Chengdu 610106, China; Institute of Cancer Biology and Drug Discovery, Chengdu University, Chengdu 610106, China; School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Yixi Yang
- Engineering Research Center of Sichuan-Tibet Traditional Medicinal Plant, Chengdu University, Chengdu 610106, China; Institute of Cancer Biology and Drug Discovery, Chengdu University, Chengdu 610106, China; School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - YaMei Zhang
- Key Laboratory of Clinical Genetics, Affiliated Hospital of Chengdu University, Chengdu 610106, China
| | - Fulun Li
- Department of Dermatology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, NO. 110, Ganhe Road, Shanghai 200437, China.
| | - Yu Deng
- Engineering Research Center of Sichuan-Tibet Traditional Medicinal Plant, Chengdu University, Chengdu 610106, China; Institute of Cancer Biology and Drug Discovery, Chengdu University, Chengdu 610106, China; School of Basic Medical Sciences, Chengdu University, NO. 2025, Chengluo Road, Chengdu 610106, China.
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15
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Histamine Activates Human Eosinophils via H2R and H4R Predominantly in Atopic Dermatitis Patients. Int J Mol Sci 2022; 23:ijms231810294. [PMID: 36142206 PMCID: PMC9499661 DOI: 10.3390/ijms231810294] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/29/2022] [Accepted: 08/31/2022] [Indexed: 12/02/2022] Open
Abstract
Atopic dermatitis (AD) is maintained by a variety of cells and inflammatory mediators, including eosinophils and histamine. We recently reported that eosinophils from AD patients highly express the H4R. However, its immunomodulatory function in eosinophils is still largely unexplored. In this study, transcriptome analysis of blood eosinophils from AD patients stimulated with histamine and the H4R agonist ST-1006 revealed several regulated genes (e.g., IL-18R, IL-1RL1, PDE4B, CXCR4) involved in inflammation. Subsequently, the impact of histamine on one of the strongly regulated genes, the IL-18 receptor (IL-18Rα), was investigated in detail. Stimulation with histamine induced the upregulation of IL-18Rα at mRNA and at the protein level in human eosinophils, which was more pronounced in cells from AD patients than in cells from healthy controls. IL-18 was upregulated via histamine as well. After pre-incubation with histamine and IFN-γ, subsequent stimulation with IL-18 resulted in an increased ECP mRNA expression. The activation of eosinophils by histamine, in combination with IFN-γ and IL-5, was also accompanied by an upregulation of CD69. Thus, our results indicate a crucial role of histamine in the upregulation of the IL-18/IL-18R axis and in the activation of human eosinophils from AD patients.
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16
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Probing the Skin–Brain Axis: New Vistas Using Mouse Models. Int J Mol Sci 2022; 23:ijms23137484. [PMID: 35806489 PMCID: PMC9267936 DOI: 10.3390/ijms23137484] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/01/2022] [Accepted: 07/04/2022] [Indexed: 12/10/2022] Open
Abstract
Inflammatory diseases of the skin, including atopic dermatitis and psoriasis, have gained increasing attention with rising incidences in developed countries over the past decades. While bodily properties, such as immunological responses of the skin, have been described in some detail, interactions with the brain via different routes are less well studied. The suggested routes of the skin–brain axis comprise the immune system, HPA axis, and the peripheral and central nervous system, including microglia responses and structural changes. They provide starting points to investigate the molecular mechanisms of neuropsychiatric comorbidities in AD and psoriasis. To this end, mouse models exist for AD and psoriasis that could be tested for relevant behavioral entities. In this review, we provide an overview of the current mouse models and assays. By combining an extensive behavioral characterization and state-of-the-art genetic interventions with the investigation of underlying molecular pathways, insights into the mechanisms of the skin–brain axis in inflammatory cutaneous diseases are examined, which will spark further research in humans and drive the development of novel therapeutic strategies.
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17
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Chung EJ, Luo CH, Thio CLP, Chang YJ. Immunomodulatory Role of Staphylococcus aureus in Atopic Dermatitis. Pathogens 2022; 11:pathogens11040422. [PMID: 35456097 PMCID: PMC9025081 DOI: 10.3390/pathogens11040422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/23/2022] [Accepted: 03/29/2022] [Indexed: 12/24/2022] Open
Abstract
Staphylococcus aureus is a gram-positive bacterium commonly found on humans, and it constitutes the skin microbiota. Presence of S. aureus in healthy individuals usually does not pose any threat, as the human body is equipped with many mechanisms to prevent pathogen invasion and infection. However, colonization of S. aureus has been correlated with many healthcare-associated infections, and has been found in people with atopic diseases. In atopic dermatitis, constant fluctuations due to inflammation of the epidermal and mucosal barriers can cause structural changes and allow foreign antigens and pathogens to bypass the first line of defense of the innate system. As they persist, S. aureus can secrete various virulence factors to enhance their survival by host invasion and evasion mechanisms. In response, epithelial cells can release damage-associated molecular patterns, or alarmins such as TSLP, IL-25, IL-33, and chemokines, to recruit innate and adaptive immune cells to cause inflammation. Until recently, IL-36 had been found to play an important role in modulating atopic dermatitis. Secretion of IL-36 from keratinocytes can activate a Th2 independent pathway to trigger symptoms of allergic reaction resulting in clinical manifestations. This mini review aims to summarize the immunomodulatory roles of S. aureus virulence factors and how they contribute to the pathogenesis of atopic diseases.
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Affiliation(s)
- Ethan Jachen Chung
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115024, Taiwan; (E.J.C.); (C.-H.L.); (C.L.-P.T.)
- Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei 10051, Taiwan
| | - Chia-Hui Luo
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115024, Taiwan; (E.J.C.); (C.-H.L.); (C.L.-P.T.)
- Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei 10051, Taiwan
| | - Christina Li-Ping Thio
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115024, Taiwan; (E.J.C.); (C.-H.L.); (C.L.-P.T.)
| | - Ya-Jen Chang
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115024, Taiwan; (E.J.C.); (C.-H.L.); (C.L.-P.T.)
- Institute of Translational Medicine and New Drug Development, China Medical University, Taichung 406040, Taiwan
- Correspondence:
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18
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Woods K, Cait A, Gell K, Naidoo K, Brown C, Carpenter E, Gasser O. Goat milk-derived lipids restrain NKT cell-dependent eosinophilic inflammation in a murine model of atopic dermatitis. J Invest Dermatol 2022; 142:2541-2543. [PMID: 35300974 DOI: 10.1016/j.jid.2022.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 02/15/2022] [Accepted: 03/01/2022] [Indexed: 11/27/2022]
Affiliation(s)
- Katherine Woods
- Malaghan Institute of Medical Research, Wellington, New Zealand
| | - Alissa Cait
- Malaghan Institute of Medical Research, Wellington, New Zealand
| | - Katie Gell
- Malaghan Institute of Medical Research, Wellington, New Zealand
| | - Karmella Naidoo
- Malaghan Institute of Medical Research, Wellington, New Zealand
| | - Caitlin Brown
- Malaghan Institute of Medical Research, Wellington, New Zealand
| | | | - Olivier Gasser
- Malaghan Institute of Medical Research, Wellington, New Zealand; High-Value Nutrition National Science Challenge, Auckland, New Zealand.
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19
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Wu T, Tang L, Feng Y, Jia Y, Li F. Eosinophils and associated parameters in different types of skin diseases related to elevated eosinophil levels. ANNALS OF TRANSLATIONAL MEDICINE 2022; 10:73. [PMID: 35282056 PMCID: PMC8848371 DOI: 10.21037/atm-22-99] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 01/14/2022] [Indexed: 11/06/2022]
Abstract
Background Eosinophils, basophils, white blood cells (WBC), and immunoglobulin E (IgE) play major roles in the pathogenesis of atopic dermatitis (AD), bullous pemphigoid (BP), drug reaction with eosinophilia and systemic symptoms (DRESS), and hypereosinophilic syndrome (HES). This study aimed to describe these parameters in different skin diseases and provide further information concerning the underlying pathogenesis. Methods A cross-sectional study of blood test results, including WBC count, peripheral eosinophil count, peripheral basophil/WBC percentage, and IgE level, from 115 cases of AD, 75 cases of BP, 55 cases of DRESS, 119 cases of HES, and 621 healthy volunteers was performed in China. Data from before and after treatment and the population distribution of different diseases were compared and described. Results All participants showed increased peripheral eosinophil counts, eosinophil/WBC ratios, IgE levels, and decreased peripheral basophil counts, with variance among the different disease groups. Peripheral eosinophil counts in HES patients and IgE level in AD patients increased the most prominently. No significant correlation existed among eosinophils, basophils, and IgE. An obvious decrease in eosinophil count was demonstrated after treatment in all 4 diseases. Conclusions Eosinophils, basophils, and IgE exert functions in diverse skin diseases, presenting altered peripheral blood test results. In some cases, these changes are demonstrated only in the skin and not in the blood. Compared with the other parameters considered in this study, eosinophils seemed to be a better biomarker for treatment effects, regardless of the disease type.
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Affiliation(s)
- Tong Wu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Luyan Tang
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Yang Feng
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Yanjing Jia
- Department of Nursing, Huashan Hospital, Fudan University, Shanghai, China
| | - Fei Li
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China.,Department of Dermatology, Huashan Hospital Baoshan, Fudan University, Shanghai, China
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20
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Li YT, Yamazaki S, Takaki E, Ouchi Y, Kitayama T, Tamai K. PDGFRα-lineage origin directs monocytes to trafficking proficiency to support peripheral immunity. Eur J Immunol 2021; 52:204-221. [PMID: 34708880 PMCID: PMC9299050 DOI: 10.1002/eji.202149479] [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: 07/01/2021] [Revised: 10/11/2021] [Accepted: 10/25/2021] [Indexed: 12/03/2022]
Abstract
Multiple embryonic precursors give rise to leukocytes in adults while the lineage‐based functional impacts are underappreciated. Mesodermal precursors expressing PDGFRα appear transiently during E7.5‐8.5 descend to a subset of Lin–Sca1+Kit+ hematopoietic progenitors found in adult BM. By analyzing a PDGFRα‐lineage tracing mouse line, we here report that PDGFRα‐lineage BM F4/80+SSClo monocytes/macrophages are solely Ly6C+LFA‐1hiMac‐1hi monocytes enriched on the abluminal sinusoidal endothelium while Ly6C–LFA‐1loMac‐1lo macrophages are mostly from non‐PDGFRα‐lineage in vivo. Monocytes with stronger integrin profiles outcompete macrophages for adhesion on an endothelial monolayer or surfaces coated with ICAM‐1‐Fc or VCAM‐1‐Fc. Egress of PDGFRα‐lineage‐rich monocytes and subsequent differentiation to peripheral macrophages spatially segregates them from non‐PDGFRα‐lineage BM‐resident macrophages and allows functional specialization since macrophages derived from these egressing monocytes differ in morphology, phenotype, and functionality from BM‐resident macrophages in culture. Extravasation preference for blood PDGFRα‐lineage monocytes varies by tissues and governs the local lineage composition of macrophages. More PDGFRα‐lineage classical monocytes infiltrated into skin and colon but not into peritoneum. Accordingly, transcriptomic analytics indicated augmented inflammatory cascades in dermatitis skin of BM‐chimeric mice harbouring only PDGFRα‐lineage leukocytes. Thus, the PDGFRα‐lineage origin biasedly generates monocytes predestined for BM exit to support peripheral immunity following extravasation and macrophage differentiation.
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Affiliation(s)
- Yu-Tung Li
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
| | | | | | | | | | - Katsuto Tamai
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
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21
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Pellefigues C, Naidoo K, Mehta P, Schmidt AJ, Jagot F, Roussel E, Cait A, Yumnam B, Chappell S, Meijlink K, Camberis M, Jiang JX, Painter G, Filbey K, Uluçkan Ö, Gasser O, Le Gros G. Basophils promote barrier dysfunction and resolution in the atopic skin. J Allergy Clin Immunol 2021; 148:799-812.e10. [PMID: 33662369 PMCID: PMC8410897 DOI: 10.1016/j.jaci.2021.02.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 02/07/2021] [Accepted: 02/12/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND The type 2 cytokines IL-4 and IL-13 promote not only atopic dermatitis (AD) but also the resolution of inflammation. How type 2 cytokines participate in the resolution of AD is poorly known. OBJECTIVE Our aim was to determine the mechanisms and cell types governing skin inflammation, barrier dysfunction, and resolution of inflammation in a model of AD. METHODS Mice that exhibit expression of IL-4, IL-13, and MCPT8 or that could be depleted of basophils or eosinophils, be deficient in IL-4 or MHC class II molecules, or have basophils lacking macrophage colony-stimulating factor (M-CSF) were treated with calcipotriol (MC903) as an acute model of AD. Kinetics of the disease; keratinocyte differentiation; and leukocyte accumulation, phenotype, function, and cytokine production were measured by transepidermal water loss, histopathology, molecular biology, or unbiased analysis of spectral flow cytometry. RESULTS In this model of AD, basophils were activated systemically and were the initial and main source of IL-4 in the skin. Basophils and IL-4 promoted epidermal hyperplasia and skin barrier dysfunction by acting on keratinocyte differentiation during inflammation. Basophils, IL-4, and basophil-derived M-CSF inhibited the accumulation of proinflammatory cells in the skin while promoting the expansion and function of proresolution M2-like macrophages and the expression of probarrier genes. Basophils kept their proresolution properties during AD resolution. CONCLUSION Basophils can display both beneficial and detrimental type 2 functions simultaneously during atopic inflammation.
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Affiliation(s)
- Christophe Pellefigues
- Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand; INSERM UMR1149, CNRS ERL8252, Centre de recherche sur l'inflammation, Inflamex, Université de Paris, Paris, France.
| | - Karmella Naidoo
- Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Palak Mehta
- Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Alfonso J Schmidt
- Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Ferdinand Jagot
- Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Elsa Roussel
- Novartis Institutes for Biomedical Research (NIBR), Novartis, Basel, Switzerland
| | - Alissa Cait
- Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Bibek Yumnam
- Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Sally Chappell
- Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Kimberley Meijlink
- Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Mali Camberis
- Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Jean X Jiang
- Department of Biochemistry and Structural Biology, University of Texas Health Science Center, San Antonio, Tex
| | - Gavin Painter
- Ferrier Research Institute, Victoria University, Wellington, New Zealand
| | - Kara Filbey
- Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Özge Uluçkan
- Novartis Institutes for Biomedical Research (NIBR), Novartis, Basel, Switzerland
| | - Olivier Gasser
- Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Graham Le Gros
- Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
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22
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Xie L, McKenzie CI, Qu X, Mu Y, Wang Q, Bing N, Naidoo K, Alam MJ, Yu D, Gong F, Ang C, Robert R, Marques FZ, Furlotte N, Hinds D, Gasser O, Xavier RJ, Mackay CR. pH and Proton Sensor GPR65 Determine Susceptibility to Atopic Dermatitis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2021; 207:101-109. [PMID: 34135065 PMCID: PMC8674371 DOI: 10.4049/jimmunol.2001363] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 04/15/2021] [Indexed: 12/15/2022]
Abstract
pH sensing by GPR65 regulates various inflammatory conditions, but its role in skin remains unknown. In this study, we performed a phenome-wide association study and report that the T allele of GPR65-intronic single-nucleotide polymorphism rs8005161, which reduces GPR65 signaling, showed a significant association with atopic dermatitis, in addition to inflammatory bowel diseases and asthma, as previously reported. Consistent with this genetic association in humans, we show that deficiency of GPR65 in mice resulted in markedly exacerbated disease in the MC903 experimental model of atopic dermatitis. Deficiency of GPR65 also increased neutrophil migration in vitro. Moreover, GPR65 deficiency in mice resulted in higher expression of the inflammatory cytokine TNF-α by T cells. In humans, CD4+ T cells from rs8005161 heterozygous individuals expressed higher levels of TNF-α after PMA/ionomycin stimulation, particularly under pH 6 conditions. pH sensing by GPR65 appears to be important for regulating the pathogenesis of atopic dermatitis.
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Affiliation(s)
- Liang Xie
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Hypertension Research Laboratory, School of Biological Sciences, Monash University, Clayton, Victoria, Australia
| | - Craig I McKenzie
- Department of Immunology and Pathology, Central Clinical School, Monash University, Melbourne, Victoria, Australia
- Department of Allergy, Immunology and Respiratory Medicine, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Xinyan Qu
- School of Pharmaceutical Sciences, Shandong Analysis and Test Center, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - Yan Mu
- School of Pharmaceutical Sciences, Shandong Analysis and Test Center, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - Quanbo Wang
- School of Pharmaceutical Sciences, Shandong Analysis and Test Center, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | | | - Karmella Naidoo
- Malaghan Institute of Medical Research, Victoria University of Wellington, Wellington, New Zealand
| | - Md Jahangir Alam
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Di Yu
- School of Pharmaceutical Sciences, Shandong Analysis and Test Center, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
- The University of Queensland Diamantina Institute, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Fang Gong
- Department of Laboratory Medicine, Wuxi Hospital of Integrated Traditional Chinese and Western Medicine, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Caroline Ang
- Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Remy Robert
- Department of Physiology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Francine Z Marques
- Hypertension Research Laboratory, School of Biological Sciences, Monash University, Clayton, Victoria, Australia
- Heart Failure Research Laboratory, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | | | | | - Olivier Gasser
- Malaghan Institute of Medical Research, Victoria University of Wellington, Wellington, New Zealand
| | - Ramnik J Xavier
- Broad Institute, MA
- Center for Computational and Integrative Biology, Department of Molecular Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA; and
- Center for Microbiome Informatics and Therapeutics, Massachusetts Institute of Technology, Cambridge, MA
| | - Charles R Mackay
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia;
- School of Pharmaceutical Sciences, Shandong Analysis and Test Center, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
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23
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Jacobsen EA, Jackson DJ, Heffler E, Mathur SK, Bredenoord AJ, Pavord ID, Akuthota P, Roufosse F, Rothenberg ME. Eosinophil Knockout Humans: Uncovering the Role of Eosinophils Through Eosinophil-Directed Biological Therapies. Annu Rev Immunol 2021; 39:719-757. [PMID: 33646859 PMCID: PMC8317994 DOI: 10.1146/annurev-immunol-093019-125918] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The enigmatic eosinophil has emerged as an exciting component of the immune system, involved in a plethora of homeostatic and inflammatory responses. Substantial progress has been achieved through experimental systems manipulating eosinophils in vivo, initially in mice and more recently in humans. Researchers using eosinophil knockout mice have identified a contributory role for eosinophils in basal and inflammatory processes and protective immunity. Primarily fueled by the purported proinflammatory role of eosinophils in eosinophil-associated diseases, a series of anti-eosinophil therapeutics have emerged as a new class of drugs. These agents, which dramatically deplete eosinophils, provide a valuable opportunity to characterize the consequences of eosinophil knockout humans. Herein, we comparatively describe mouse and human eosinophil knockouts. We put forth the view that human eosinophils negatively contribute to a variety of diseases and, unlike mouse eosinophils, do not yet have an identified role in physiological health; thus, clarifying all roles of eosinophils remains an ongoing pursuit.
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Affiliation(s)
- Elizabeth A Jacobsen
- Division of Allergy, Asthma and Clinical Immunology, Mayo Clinic, Scottsdale, Arizona 85259, USA;
| | - David J Jackson
- Guy's and St Thomas' Hospitals, London WC2R 2LS, United Kingdom;
- Department of Immunobiology, King's College London, London WC2R 2LS, United Kingdom
| | - Enrico Heffler
- Department of Biomedical Sciences, Humanitas University, 20090 Milan, Italy
- Personalized Medicine, Asthma and Allergy Unit, Humanitas Clinical and Research Center IRCCS, 20089 Milan, Italy;
| | - Sameer K Mathur
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin 53792, USA;
| | - Albert J Bredenoord
- Department of Gastroenterology and Hepatology, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - Ian D Pavord
- Respiratory Medicine Unit, Oxford Respiratory NIHR BRC, Nuffield Department of Medicine, Oxford OX3 9DU, United Kingdom;
| | - Praveen Akuthota
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University of California, San Diego, La Jolla, California 92093, USA;
| | - Florence Roufosse
- Médecine Interne, Hôpital Erasme, Université Libre de Bruxelles, 1070 Brussels, Belgium;
| | - Marc E Rothenberg
- Division of Allergy and Immunology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio 45229, USA;
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24
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Fan J, Mishra SK. The emerging role of neuroimmune interactions in atopic dermatitis and itch. FEBS J 2021; 289:2723-2735. [PMID: 33811449 DOI: 10.1111/febs.15860] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 03/13/2021] [Accepted: 04/01/2021] [Indexed: 12/20/2022]
Abstract
Millions of people globally suffer from allergic diseases, and the cases have been rising in the past decades. One of the major manifestations of allergic diseases is itch, which is an unpleasant symptom that triggers the urge to scratch and greatly affects the quality of life. Thus, research on how sensation of itch is detected/transmitted from the contact of the allergen to the nervous system is crucial in mitigating itch. Recent studies have attempted to elucidate the mechanisms of itch in allergic diseases. Here, we aim to review the endogenous mediators released from immune/nonimmune skin cells (that are indirectly involved in the propagation of itch) and the sensory neurons that express receptors for these itch mediators that are associated with direct transmission of itch in cutaneous allergic diseases. As the mechanisms for allergic itch become clearer, new therapeutic approaches to relieve itch are likely to be developed. Recent clinical trials are testing numerous compounds that target the endogenous mediators and their receptors. These studies provide the possibility of more effective itch treatment for allergic diseases.
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Affiliation(s)
- Jennifer Fan
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Santosh K Mishra
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA.,Comparative Medicine Institute, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA.,Program in Genetics, North Carolina State University, Raleigh, NC, USA
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25
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Chu Z, Xu Q, Zhu Q, Ma X, Mo J, Lin G, Zhao Y, Gu Y, Bian L, Shao L, Guo J, Ye W, Li J, He G, Xu Y. Design, synthesis and biological evaluation of novel benzoxaborole derivatives as potent PDE4 inhibitors for topical treatment of atopic dermatitis. Eur J Med Chem 2021; 213:113171. [PMID: 33482600 DOI: 10.1016/j.ejmech.2021.113171] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 01/07/2021] [Accepted: 01/07/2021] [Indexed: 02/06/2023]
Abstract
In this work, a series of structurally novel benzoxaborole derivatives were designed, synthesized and biologically evaluated as PDE4 inhibitors for battling atopic dermatitis (AD). Among them, the majority exhibited superior PDE4B inhibitory activities to that of the lead compound Crisaborole, an approved PDE4 inhibitor. In particular, 72, the most potent PDE4B inhibitor throughout this series, displayed 136-fold improved enzymatic activity (IC50 = 0.42 nM) as compared to Crisaborole (IC50 = 57.20 nM), along with favorable isoform specificity. In the phorbol ester (PMA)-induced mouse ear oedema model, 72 exerted remarkably greater efficacy than Crisaborole at the same dosage (P < 0.05). Moreover, the ointment of 72 exerted dramatically enhanced therapeutic potency than the ointment of Crisaborole (P < 0.05) in the calcipotriol-induced mouse AD model. In addition to the potent in vitro and in vivo activity, 72 displayed favorable safety in the repeated oral dose toxicity study and did not exhibit phototoxicity. With the above attractive biological performance, 72 is worthy of further functional investigation as a novel anti-AD therapeutic agent.
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Affiliation(s)
- Zhaoxing Chu
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, China; Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 21009, China; Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Qinlong Xu
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China; Department of Medicinal Chemistry, Anhui University of Chinese Medicine, Hefei, 230031, China
| | - Qihua Zhu
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, China; Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 21009, China
| | - Xiaodong Ma
- Department of Medicinal Chemistry, Anhui University of Chinese Medicine, Hefei, 230031, China
| | - Jiajia Mo
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Gaofeng Lin
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Yan Zhao
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Yuanfeng Gu
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Lincui Bian
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Li Shao
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Jing Guo
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Wenfeng Ye
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China
| | - Jiaming Li
- Department of Medicinal Chemistry, Anhui University of Chinese Medicine, Hefei, 230031, China
| | - Guangwei He
- Hefei Institute of Pharmaceutical Industry Co., Ltd., Hefei, 230088, China.
| | - Yungen Xu
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, China; Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 21009, China.
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26
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Gilhar A, Reich K, Keren A, Kabashima K, Steinhoff M, Paus R. Mouse models of atopic dermatitis: a critical reappraisal. Exp Dermatol 2021; 30:319-336. [PMID: 33368555 DOI: 10.1111/exd.14270] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 12/17/2020] [Accepted: 12/17/2020] [Indexed: 12/13/2022]
Abstract
Mouse models for atopic dermatitis (AD) are an indispensable preclinical research tool for testing new candidate AD therapeutics and for interrogating AD pathobiology in vivo. In this Viewpoint, we delineate why, unfortunately, none of the currently available so-called "AD" mouse models satisfactorily reflect the clinical complexity of human AD, but imitate more "allergic" or "irriant" contact dermatitis conditions. This limits the predictive value of AD models for clinical outcomes of new tested candidate AD therapeutics and the instructiveness of mouse models for human AD pathophysiology research. Here, we propose to initiate a rational debate on the minimal criteria that a mouse model should meet in order to be considered relevant for human AD. We suggest that valid AD models should at least meet the following criteria: (a) an AD-like epidermal barrier defect with reduced filaggrin expression along with hyperproliferation, hyperplasia; (b) increased epidermal expression of thymic stromal lymphopoietin (TSLP), periostin and/or chemokines such as TARC (CCL17); (c) a characteristic dermal immune cell infiltrate with overexpression of some key cytokines such as IL-4, IL-13, IL-31 and IL-33; (d) distinctive "neurodermatitis" features (sensory skin hyperinnervation, defective beta-adrenergic signalling, neurogenic skin inflammation and triggering or aggravation of AD-like skin lesions by perceived stress); and (e) response of experimentally induced skin lesions to standard AD therapy. Finally, we delineate why humanized AD mouse models (human skin xenotransplants on SCID mice) offer a particularly promising preclinical research alternative to the currently available "AD" mouse models.
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Affiliation(s)
- Amos Gilhar
- Skin Research Laboratory, Rappaport Faculty of Medicine, Technion -Israel Institute of Technology, Haifa, Israel.,Rambam Health Care Campus, Haifa, Israel
| | - Kristian Reich
- Centre for Translational Research in Inflammatory Skin Diseases, Institute for Health Services Research in Dermatology and Nursing, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Skinflammation Center, Hamburg, Germany
| | - Aviad Keren
- Skin Research Laboratory, Rappaport Faculty of Medicine, Technion -Israel Institute of Technology, Haifa, Israel
| | - Kenji Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Singapore Immunology Network (SIgN) and Institute of Medical Biology, Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore, Singapore
| | - Martin Steinhoff
- Department of Dermatology and Venereology, Hamad Medical Corporation, Qatar University, Doha, Qatar.,School of Medicine, Weill Cornell University-Qatar and Qatar University, Doha, Qatar
| | - Ralf Paus
- Dr. Phillip Frost, Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.,Dermatology Research Centre, University of Manchester and NIHR Manchester Biomedical Research Centre, Manchester, UK.,Monasterium Laboratory, Münster, Germany
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27
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Alam MJ, Xie L, Ang C, Fahimi F, Willingham SB, Kueh AJ, Herold MJ, Mackay CR, Robert R. Therapeutic blockade of CXCR2 rapidly clears inflammation in arthritis and atopic dermatitis models: demonstration with surrogate and humanized antibodies. MAbs 2020; 12:1856460. [PMID: 33347356 PMCID: PMC7757791 DOI: 10.1080/19420862.2020.1856460] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Neutrophils are the most abundant effector cells of the innate immune system and represent the first line of defense against infection. However, in many common pathologies, including autoimmune diseases, excessive recruitment and activation of neutrophils can drive a chronic inflammatory response leading to unwanted tissue destruction. Several strategies have been investigated to tackle pathologic neutrophil biology, and thus provide a novel therapy for chronic inflammatory diseases. The chemokine receptor CXCR2 plays a crucial role in regulating neutrophil homeostasis and is a promising pharmaceutical target. In this study, we report the discovery and validation of a humanized anti-human CXCR2 monoclonal antibody. To enable in vivo studies, we developed a surrogate anti-mouse CXCR2 antibody, as well as a human knock-in CXCR2 mouse. When administered in models of atopic dermatitis (AD) and rheumatoid arthritis (RA), the antibodies rapidly clear inflammation. Our findings support further developments of anti-CXCR2 mAb approaches not only for RA and AD, but also for other neutrophil-mediated inflammatory conditions where neutrophils are pathogenic and medical needs are unmet.
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Affiliation(s)
- Md Jahangir Alam
- Department of Microbiology, Biomedicine Discovery Institute, Monash University , Clayton, Victoria, Australia
| | - Liang Xie
- Department of Microbiology, Biomedicine Discovery Institute, Monash University , Clayton, Victoria, Australia
| | - Caroline Ang
- Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University , Clayton, Victoria, Australia
| | - Farnaz Fahimi
- Department of Physiology, Biomedicine Discovery Institute, Monash University , Clayton, Victoria, Australia
| | | | - Andrew J Kueh
- Walter and Eliza Hall Institute of Medical Research , Parkville, Victoria, Australia.,Department of Medical Biology, University of Melbourne , Parkville, VIC, Australia
| | - Marco J Herold
- Walter and Eliza Hall Institute of Medical Research , Parkville, Victoria, Australia.,Department of Medical Biology, University of Melbourne , Parkville, VIC, Australia
| | - Charles R Mackay
- Department of Microbiology, Biomedicine Discovery Institute, Monash University , Clayton, Victoria, Australia
| | - Remy Robert
- Department of Physiology, Biomedicine Discovery Institute, Monash University , Clayton, Victoria, Australia
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28
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Pellefigues C. IgE Autoreactivity in Atopic Dermatitis: Paving the Road for Autoimmune Diseases? Antibodies (Basel) 2020; 9:E47. [PMID: 32911788 PMCID: PMC7551081 DOI: 10.3390/antib9030047] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/02/2020] [Accepted: 09/04/2020] [Indexed: 12/20/2022] Open
Abstract
Atopic dermatitis (AD) is a common skin disease affecting 20% of the population beginning usually before one year of age. It is associated with the emergence of allergen-specific IgE, but also with autoreactive IgE, whose function remain elusive. This review discusses current knowledge relevant to the mechanisms, which leads to the secretion of autoreactive IgE and to the potential function of these antibodies in AD. Multiple autoantigens have been described to elicit an IgE-dependent response in this context. This IgE autoimmunity starts in infancy and is associated with disease severity. Furthermore, the overall prevalence of autoreactive IgE to multiple auto-antigens is high in AD patients. IgE-antigen complexes can promote a facilitated antigen presentation, a skewing of the adaptive response toward type 2 immunity, and a chronic skin barrier dysfunction and inflammation in patients or AD models. In AD, skin barrier defects and the atopic immune environment facilitate allergen sensitization and the development of other IgE-mediated allergic diseases in a process called the atopic march. AD is also associated epidemiologically with several autoimmune diseases showing autoreactive IgE secretion. Thus, a potential outcome of IgE autoreactivity in AD could be the development of further autoimmune diseases.
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Affiliation(s)
- Christophe Pellefigues
- INSERM UMRS1149-CNRS ERL8252, Team «Basophils and Mast cells in Immunopathology», Centre de recherche sur l'inflammation (CRI), Inflamex, DHU Fire, Université de Paris, 75018 Paris, France
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29
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Hou T, Sun X, Zhu J, Hon KL, Jiang P, Chu IMT, Tsang MSM, Lam CWK, Zeng H, Wong CK. IL-37 Ameliorating Allergic Inflammation in Atopic Dermatitis Through Regulating Microbiota and AMPK-mTOR Signaling Pathway-Modulated Autophagy Mechanism. Front Immunol 2020; 11:752. [PMID: 32411145 PMCID: PMC7198885 DOI: 10.3389/fimmu.2020.00752] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 04/02/2020] [Indexed: 12/21/2022] Open
Abstract
Interaction between eosinophils and dermal fibroblasts is essential for provoking allergic inflammation in atopic dermatitis (AD). In vitro co-culture of human eosinophils and dermal fibroblasts upon AD-related IL-31 and IL-33 stimulation, and in vivo MC903-induced AD murine model were employed to investigate the anti-inflammatory mechanism of IL-1 family cytokine IL-37 in AD. Results showed that IL-37b could inhibit the in vitro induction of AD-related pro-inflammatory cytokines IL-6 and TNF-α, and chemokines CXCL8, CCL2 and CCL5, increase autophagosome biogenesis-related LC3B, and decrease autophagy-associated ubiquitinated protein p62 by regulating intracellular AMP-activated protein kinase (AMPK) and mammalian target of rapamycin (mTOR) signaling pathway. In CRISPR/Cas9 human IL-37b knock-in mice, IL-37b could significantly alleviate MC903-stimulated ear tissue swelling, itching sensation and the level of circulating cytokine IL-6 and ear in situ expression of AD-related TNF-α, CCL5 and transforming growth factor-β. Moreover, IL-37b could significantly upregulate Foxp3+ regulatory T cells (Treg) in spleen and ear together with significantly increased serum Treg cytokine IL-10, and decrease eosinophil infiltration in ear lesion. IL-37b knock-in mice showed a distinct intestinal microbiota metabolic pattern upon MC903 stimulation. Furthermore, IL-37b restored the disordered gut microbiota diversity, through regulating the in vivo autophagy mechanism mediated by intestinal metabolite 3-methyladenine, adenosine monophosphate, 2-hydroxyglutarate, purine and melatonin. In summary, IL-37b could significantly ameliorate eosinophils-mediated allergic inflammation via the regulation of autophagy mechanism, intestinal bacterial diversity and their metabolites in AD. Results therefore suggest that IL-37 is a potential anti-inflammatory cytokine for AD treatment.
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Affiliation(s)
- Tianheng Hou
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong, China
| | - Xiaoyu Sun
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong, China
| | - Jing Zhu
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong, China
| | - Kam-Lun Hon
- Department of Paediatrics, The Chinese University of Hong Kong, Hong Kong, China
| | - Peiyong Jiang
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong, China
| | - Ida Miu-Ting Chu
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong, China
| | - Miranda Sin-Man Tsang
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong, China.,State Key Laboratory of Research on Bioactivities and Clinical Applications of Medicinal Plants, Institute of Chinese Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Christopher Wai-Kei Lam
- State Key Laboratory of Quality Research in Chinese Medicines, Faculty of Medicine, Macau University of Science and Technology, Macau, China
| | - Huasong Zeng
- Department of Allergy, Immunology and Rheumatology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Chun-Kwok Wong
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong, China.,State Key Laboratory of Research on Bioactivities and Clinical Applications of Medicinal Plants, Institute of Chinese Medicine, The Chinese University of Hong Kong, Hong Kong, China
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30
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SnapshotDx Quiz: December 2019. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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31
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Pellefigues C, Mehta P, Prout MS, Naidoo K, Yumnam B, Chandler J, Chappell S, Filbey K, Camberis M, Le Gros G. The Basoph8 Mice Enable an Unbiased Detection and a Conditional Depletion of Basophils. Front Immunol 2019; 10:2143. [PMID: 31552058 PMCID: PMC6746837 DOI: 10.3389/fimmu.2019.02143] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Accepted: 08/27/2019] [Indexed: 01/05/2023] Open
Abstract
Basophils are granulocytes involved in parasite immunity and allergic diseases, known for their potent secretion of type 2 cytokines. Identifying their functions has proven to be controversial due to their relative rarity and their complex lineage phenotype. Here, we show that the expression of basophils lineage markers CD200R3 and FcεRIα is highly variable in inflammatory settings and hinders basophils identification by flow cytometry across multiple disease states or tissues. Fluorophore-conjugated antibody staining of these lineage markers strongly activates basophil type 2 cytokine expression, and represents a potential bias for coculture or in vivo transfer experiments. The Basoph8 is a mouse model where basophils specifically express a strong fluorescent reporter and the Cre recombinase. Basophils can be identified and FACS sorted unambiguously by their expression of the enhanced yellow fluorescent protein (eYFP) in these mice. We show that the expression of the eYFP is robust in vivo during inflammation, and in vitro on living basophils for at least 72 h, including during the induction of anaphylactoid degranulation. We bred and characterized the Basoph8xiDTR mice, in which basophils specifically express eYFP and the simian diphtheria toxin receptor (DTR). This model enables basophils conditional depletion relatively specifically ex vivo and in vivo during allergic inflammation and their detection as eYFP+ cells. In conclusion, we report underappreciated benefits of the commercially available Basoph8 mice to study basophils function.
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Affiliation(s)
- Christophe Pellefigues
- The Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Palak Mehta
- The Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Melanie Sarah Prout
- The Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Karmella Naidoo
- The Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Bibek Yumnam
- The Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Jodie Chandler
- The Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Sally Chappell
- The Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Kara Filbey
- The Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Mali Camberis
- The Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
| | - Graham Le Gros
- The Malaghan Institute of Medical Research, Victoria University, Wellington, New Zealand
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Kim D, Kobayashi T, Nagao K. Research Techniques Made Simple: Mouse Models of Atopic Dermatitis. J Invest Dermatol 2019; 139:984-990.e1. [PMID: 31010529 DOI: 10.1016/j.jid.2019.02.014] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 02/20/2019] [Accepted: 02/21/2019] [Indexed: 01/29/2023]
Abstract
Atopic dermatitis (AD) is a common, chronic inflammatory skin disease characterized by impaired barrier function, eczematous dermatitis, and chronic pruritus. Mouse models have been heavily used to deepen our understanding of complicated disease mechanisms in AD and to provide a preclinical platform before performing clinical interventional research on novel therapeutic agents in humans. However, what aspects of human AD these mouse AD models faithfully recapitulate is insufficiently understood. We categorized mouse AD models into three groups: (i) inbred models, (ii) genetically engineered mice in which genes of interest are overexpressed or deleted in a specific cell type, and (iii) models induced by topical application of exogenous agents. To maximize benefits from current murine AD models, understanding the strengths and limitations of each model is essential when selecting a system suitable for a specific research question. We describe known and emerging AD mouse models and discuss the usefulness and pitfalls of each system.
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Affiliation(s)
- Doyoung Kim
- Cutaneous Leukocyte Biology Section, Dermatology Branch, National Institute of Arthritis and Musculoskeletal and Skin Disease, National Institutes of Health, Bethesda, Maryland, USA
| | - Tetsuro Kobayashi
- Cutaneous Leukocyte Biology Section, Dermatology Branch, National Institute of Arthritis and Musculoskeletal and Skin Disease, National Institutes of Health, Bethesda, Maryland, USA
| | - Keisuke Nagao
- Cutaneous Leukocyte Biology Section, Dermatology Branch, National Institute of Arthritis and Musculoskeletal and Skin Disease, National Institutes of Health, Bethesda, Maryland, USA.
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