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Dhariwala MO, DeRogatis AM, Okoro JN, Weckel A, Tran VM, Habrylo I, Ojewumi OT, Tammen AE, Leech JM, Merana GR, Carale RO, Barrere-Cain R, Hiam-Galvez KJ, Spitzer MH, Scharschmidt TC. Commensal myeloid crosstalk in neonatal skin regulates long-term cutaneous type 17 inflammation. bioRxiv 2023:2023.09.29.560039. [PMID: 37873143 PMCID: PMC10592812 DOI: 10.1101/2023.09.29.560039] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Early life microbe-immune interactions at barrier surfaces have lasting impacts on the trajectory towards health versus disease. Monocytes, macrophages and dendritic cells are primary sentinels in barrier tissues, yet the salient contributions of commensal-myeloid crosstalk during tissue development remain poorly understood. Here, we identify that commensal microbes facilitate accumulation of a population of monocytes in neonatal skin. Transient postnatal depletion of these monocytes resulted in heightened IL-17A production by skin T cells, which was particularly sustained among CD4+ T cells into adulthood and sufficient to exacerbate inflammatory skin pathologies. Neonatal skin monocytes were enriched in expression of negative regulators of the IL-1 pathway. Functional in vivo experiments confirmed a key role for excessive IL-1R1 signaling in T cells as contributing to the dysregulated type 17 response in neonatal monocyte-depleted mice. Thus, a commensal-driven wave of monocytes into neonatal skin critically facilitates long-term immune homeostasis in this prominent barrier tissue.
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Affiliation(s)
- Miqdad O. Dhariwala
- Department of Dermatology, University of California San Francisco; San Francisco, CA USA
| | - Andrea M. DeRogatis
- Department of Dermatology, University of California San Francisco; San Francisco, CA USA
| | - Joy N. Okoro
- Department of Dermatology, University of California San Francisco; San Francisco, CA USA
- Biomedical Sciences Program, University of California San Francisco; San Francisco, CA USA
| | - Antonin Weckel
- Department of Dermatology, University of California San Francisco; San Francisco, CA USA
| | - Victoria M. Tran
- Department of Dermatology, University of California San Francisco; San Francisco, CA USA
- Biomedical Sciences Program, University of California San Francisco; San Francisco, CA USA
| | - Irek Habrylo
- Department of Dermatology, University of California San Francisco; San Francisco, CA USA
- Biomedical Sciences Program, University of California San Francisco; San Francisco, CA USA
| | | | - Allison E. Tammen
- Department of Dermatology, University of California San Francisco; San Francisco, CA USA
| | - John M. Leech
- Department of Dermatology, University of California San Francisco; San Francisco, CA USA
| | - Geil R. Merana
- Department of Dermatology, University of California San Francisco; San Francisco, CA USA
- Biomedical Sciences Program, University of California San Francisco; San Francisco, CA USA
| | - Ricardo O. Carale
- Department of Dermatology, University of California San Francisco; San Francisco, CA USA
| | - Rio Barrere-Cain
- Department of Dermatology, University of California San Francisco; San Francisco, CA USA
| | - Kamir J. Hiam-Galvez
- Biomedical Sciences Program, University of California San Francisco; San Francisco, CA USA
- Department of Otolaryngology-Head and Neck Surgery, Department of Microbiology and Immunology, Parker Institute for Cancer Immunotherapy, University of California San Francisco; San Francisco, CA USA
| | - Matthew H. Spitzer
- Department of Otolaryngology-Head and Neck Surgery, Department of Microbiology and Immunology, Parker Institute for Cancer Immunotherapy, University of California San Francisco; San Francisco, CA USA
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Weckel A, Dhariwala MO, Ly K, Tran VM, Ojewumi OT, Riggs JB, Gonzalez JR, Dwyer LR, Okoro JN, Leech JM, Bacino MS, Cho GD, Merana G, Anandasabapathy N, Kumamoto Y, Scharschmidt TC. Long-term tolerance to skin commensals is established neonatally through a specialized dendritic cell subgroup. Immunity 2023; 56:1239-1254.e7. [PMID: 37028427 PMCID: PMC10330031 DOI: 10.1016/j.immuni.2023.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 11/29/2022] [Accepted: 03/15/2023] [Indexed: 04/08/2023]
Abstract
Early-life establishment of tolerance to commensal bacteria at barrier surfaces carries enduring implications for immune health but remains poorly understood. Here, we showed that tolerance in skin was controlled by microbial interaction with a specialized subset of antigen-presenting cells. More particularly, CD301b+ type 2 conventional dendritic cells (DCs) in neonatal skin were specifically capable of uptake and presentation of commensal antigens for the generation of regulatory T (Treg) cells. CD301b+ DC2 were enriched for phagocytosis and maturation programs, while also expressing tolerogenic markers. In both human and murine skin, these signatures were reinforced by microbial uptake. In contrast to their adult counterparts or other early-life DC subsets, neonatal CD301b+ DC2 highly expressed the retinoic-acid-producing enzyme, RALDH2, the deletion of which limited commensal-specific Treg cell generation. Thus, synergistic interactions between bacteria and a specialized DC subset critically support early-life tolerance at the cutaneous interface.
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Affiliation(s)
- Antonin Weckel
- University of California, San Francisco, Department of Dermatology, San Francisco, CA 94143, USA
| | - Miqdad O Dhariwala
- University of California, San Francisco, Department of Dermatology, San Francisco, CA 94143, USA
| | - Kevin Ly
- University of California, San Francisco, Department of Dermatology, San Francisco, CA 94143, USA; University of California, San Francisco, Biomedical Sciences Graduate Program, San Francisco, CA 94143, USA
| | - Victoria M Tran
- University of California, San Francisco, Department of Dermatology, San Francisco, CA 94143, USA; University of California, San Francisco, Biomedical Sciences Graduate Program, San Francisco, CA 94143, USA
| | - Oluwasunmisola T Ojewumi
- University of California, San Francisco, Department of Dermatology, San Francisco, CA 94143, USA
| | - Julianne B Riggs
- University of California, San Francisco, Biomedical Sciences Graduate Program, San Francisco, CA 94143, USA
| | - Jeanmarie R Gonzalez
- University of California, San Francisco, Department of Dermatology, San Francisco, CA 94143, USA; University of California, San Francisco, Biomedical Sciences Graduate Program, San Francisco, CA 94143, USA
| | - Laura R Dwyer
- University of California, San Francisco, Department of Dermatology, San Francisco, CA 94143, USA; University of California, San Francisco, Biomedical Sciences Graduate Program, San Francisco, CA 94143, USA
| | - Joy N Okoro
- University of California, San Francisco, Department of Dermatology, San Francisco, CA 94143, USA
| | - John M Leech
- University of California, San Francisco, Department of Dermatology, San Francisco, CA 94143, USA
| | - Margot S Bacino
- University of California, San Francisco, Oral and Craniofacial Sciences Graduate Program, San Francisco, CA 94143, USA
| | - Grace D Cho
- University of California, San Francisco, Department of Dermatology, San Francisco, CA 94143, USA; University of California, Los Angeles, Department of Infectious Diseases, Los Angeles, CA 90095, USA
| | - Geil Merana
- University of California, San Francisco, Department of Dermatology, San Francisco, CA 94143, USA
| | - Niroshana Anandasabapathy
- Department of Dermatology, Meyer Cancer Center, Englander Institute for Precision Medicine, Weill Cornell Medical College, New York, NY, USA; Immunology and Microbial Pathogenesis Program, Weill Cornell Medical College, New York, NY, USA
| | - Yosuke Kumamoto
- Department of Pathology, Immunology and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ 07103, USA; Center for Immunity and Inflammation, Rutgers New Jersey Medical School, Newark, NJ 07103, USA
| | - Tiffany C Scharschmidt
- University of California, San Francisco, Department of Dermatology, San Francisco, CA 94143, USA.
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Gonzalez JR, Celli A, Weckel A, Dhariwala MO, Merana GR, Ojewumi OT, Okoro J, Dwyer LR, Tran VM, Meyer JM, Mauro TM, Scharschmidt TC. FLG Deficiency in Mice Alters the Early-Life CD4 + T-Cell Response to Skin Commensal Bacteria. J Invest Dermatol 2022; 143:790-800.e12. [PMID: 36496196 DOI: 10.1016/j.jid.2022.10.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 10/06/2022] [Accepted: 10/17/2022] [Indexed: 12/12/2022]
Abstract
FLG variants underlie ichthyosis vulgaris and increased risk of atopic dermatitis, conditions typified by disruption of the skin microbiome and cutaneous immune response. Yet, it remains unclear whether neonatal skin barrier compromise because of FLG deficiency alters the quality of commensal-specific T cells and the functional impact of such responses. To address these questions, we profiled changes in the skin barrier and early cutaneous immune response of neonatal C57BL/6 Flg‒/‒ and wild-type mice using single-cell RNA sequencing, flow cytometry, and other modalities. Flg‒/‒ neonates showed little alteration in transepidermal water loss or lipid- or corneocyte-related gene expression. However, they showed increases in barrier disruption genes, epidermal dye penetration, and numbers of skin CD4+ T cells. Using an engineered strain of Staphylococcus epidermidis (S. epidermidis 2W) to study the response to neonatal skin colonization, we found that commensal-specific CD4+ T cells were skewed in Flg‒/‒ pups toward effector rather than regulatory T cells. This altered response persisted into adulthood, where it was typified by T helper 17 (Th17) cells and associated with increased susceptibility to imiquimod-induced skin inflammation. Thus, subtle but impactful differences in neonatal barrier function in Flg‒/‒ mice are accompanied by a skewed commensal-specific CD4+ response, with enduring consequences for skin immune homeostasis.
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Affiliation(s)
- Jeanmarie R Gonzalez
- Department of Dermatology, University of California San Francisco, San Francisco, California, USA; Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, California, USA
| | - Anna Celli
- Department of Dermatology, University of California San Francisco, San Francisco, California, USA; Dermatology Service, San Francisco VA Medical Center, San Francisco, California, USA
| | - Antonin Weckel
- Department of Dermatology, University of California San Francisco, San Francisco, California, USA
| | - Miqdad O Dhariwala
- Department of Dermatology, University of California San Francisco, San Francisco, California, USA
| | - Geil R Merana
- Department of Dermatology, University of California San Francisco, San Francisco, California, USA
| | - Oluwasunmisola T Ojewumi
- Department of Dermatology, University of California San Francisco, San Francisco, California, USA
| | - Joy Okoro
- Department of Dermatology, University of California San Francisco, San Francisco, California, USA
| | - Laura R Dwyer
- Department of Dermatology, University of California San Francisco, San Francisco, California, USA; Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, California, USA
| | - Victoria M Tran
- Department of Dermatology, University of California San Francisco, San Francisco, California, USA; Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, California, USA
| | - Jason M Meyer
- Department of Dermatology, Vanderbilt University Medical Center, Nashville, Tennesse, USA
| | - Theodora M Mauro
- Department of Dermatology, University of California San Francisco, San Francisco, California, USA; Dermatology Service, San Francisco VA Medical Center, San Francisco, California, USA
| | - Tiffany C Scharschmidt
- Department of Dermatology, University of California San Francisco, San Francisco, California, USA.
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