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Omics Approach to Elucidating Skin Immunity in Health and Fibrosis
Omics Approach to Elucidating Skin Immunity in Health and Fibrosis
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105633
- ISBN
- 9798297644489
- DDC
- 616.079
- 저자명
- Xing, Enze.
- 서명/저자
- Omics Approach to Elucidating Skin Immunity in Health and Fibrosis
- 발행사항
- [Sl] : University of Michigan, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 136 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
- 주기사항
- Advisor: Gudjonsson, Johann E.
- 학위논문주기
- Thesis (Ph.D.)--University of Michigan, 2025.
- 초록/해제
- 요약The skin is a highly immunologically relevant organ which serves as the body's first barrier against the environment, providing protection against external insults including trauma, pathogens, and toxins. To perform these functions, the skin relies on immune components, including immune cells such as macrophages, dendritic cells, mast cells, T cells, and B cells which are found in the skin at homeostasis, but can also be recruited during inflammation. In addition, structural skin cells such as keratinocytes and fibroblasts have recently been recognized as non-classical innate immune cells due to their ability to detect and respond to pathological stimulation by modulating the immune response. Identification of these populations at homeostasis and in different contexts allows for the unraveling of the cellular functions and cell-cell interactions within disease states, resulting in the ability to identify treatments based on the underlying pathophysiological landscape. Omics approaches including single-cell and spatial RNA sequencing are helpful tools to achieve these detailed characterizations of the healthy and diseased states of skin.Our first objective was to determine if skin immunity was consistent within the organ in healthy conditions. Palmoplantar (PP) skin has been shown to be functionally and histologically distinct from non-PP skin, indicating PP skin may embody a unique immunological niche. We aimed to identify these differences by performing single-cell RNA-sequencing on CD45+ immune cells isolated from matched palm and hip biopsies from 5 healthy donors. We identified similar immune cell numbers between PP and non-PP skin, and the primary cell types isolated were myeloid and T cells. The myeloid populations between the skin sites were distinct, but Langerhans cells (LCs) were the primary myeloid cell type in both PP and non-PP skin, with transcriptomic analysis suggesting functional differences between the LC subtypes enriched in PP and non-PP skin. While the T cell populations were fairly consistent between the two sites, they also appeared functionally distinct, with palmar CD4 and CD8 T cells exhibiting increased activation compared to those from the hip. Overall, these results define PP skin as a distinct immunological site and suggest special attention should be given to the research of PP presentations of common inflammatory dermatoses.Our second objective was to utilize omics approaches to understand the pathological mechanisms of pansclerotic morphea (PSM), a rare, devastating disease characterized by extensive soft tissue fibrosis, secondary contractions, and significant morbidity. PSM pathogenesis is unknown, and aggressive immunosuppressive treatments rarely slow disease progression. We characterized molecular mechanisms driving PSM using single-cell and spatial RNA-sequencing with immunostaining and in vitro validation. We identified dense myeloid, B cell, and T cell infiltration in PSM lesional skin, with type-II IFN secretion by T cells. A type-II IFN responsive CXCL9+ fibroblast population was enriched in PSM, characterized by increased chemokine and antigen presentation machinery expression. We also identified COL8A1+ myofibroblasts, with enriched TGF-β response and extracellular matrix remodeling functions. Finally, cell-cell interaction analyses revealed cDC2B dendritic cells as a key communication hub between CXCL9+ fibroblasts and COL8A1+ myofibroblasts. Overall, these results define PSM as an autoimmune fibrotic condition centered on type-II IFN responses. This work identified pathogenic circuits between T-cells, cDC2Bs, and myofibroblasts, and suggests JAK1/2 inhibition is a potential therapeutic option in PSM.In addition to their individual findings, these works demonstrate the effective application of omics approaches to address outstanding questions in the field of skin immunology.
- 일반주제명
- Immunology
- 일반주제명
- Dermatology
- 일반주제명
- Cellular biology
- 일반주제명
- Molecular biology
- 키워드
- Healthy skin
- 키워드
- Fibrosis
- 키워드
- RNA sequencing
- 키워드
- Palmoplantar
- 기타저자
- University of Michigan Immunology PhD
- 기본자료저록
- Dissertations Abstracts International. 87-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105633
■006m o d
■007cr#unu||||||||
■020 ▼a9798297644489
■035 ▼a(MiAaPQ)AAI32364329
■035 ▼a(MiAaPQ)umichrackham006544
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a616.079
■1001 ▼aXing, Enze.
■24510▼aOmics Approach to Elucidating Skin Immunity in Health and Fibrosis
■260 ▼a[Sl]▼bUniversity of Michigan▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a136 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-04, Section: B.
■500 ▼aAdvisor: Gudjonsson, Johann E.
■5021 ▼aThesis (Ph.D.)--University of Michigan, 2025.
■520 ▼aThe skin is a highly immunologically relevant organ which serves as the body's first barrier against the environment, providing protection against external insults including trauma, pathogens, and toxins. To perform these functions, the skin relies on immune components, including immune cells such as macrophages, dendritic cells, mast cells, T cells, and B cells which are found in the skin at homeostasis, but can also be recruited during inflammation. In addition, structural skin cells such as keratinocytes and fibroblasts have recently been recognized as non-classical innate immune cells due to their ability to detect and respond to pathological stimulation by modulating the immune response. Identification of these populations at homeostasis and in different contexts allows for the unraveling of the cellular functions and cell-cell interactions within disease states, resulting in the ability to identify treatments based on the underlying pathophysiological landscape. Omics approaches including single-cell and spatial RNA sequencing are helpful tools to achieve these detailed characterizations of the healthy and diseased states of skin.Our first objective was to determine if skin immunity was consistent within the organ in healthy conditions. Palmoplantar (PP) skin has been shown to be functionally and histologically distinct from non-PP skin, indicating PP skin may embody a unique immunological niche. We aimed to identify these differences by performing single-cell RNA-sequencing on CD45+ immune cells isolated from matched palm and hip biopsies from 5 healthy donors. We identified similar immune cell numbers between PP and non-PP skin, and the primary cell types isolated were myeloid and T cells. The myeloid populations between the skin sites were distinct, but Langerhans cells (LCs) were the primary myeloid cell type in both PP and non-PP skin, with transcriptomic analysis suggesting functional differences between the LC subtypes enriched in PP and non-PP skin. While the T cell populations were fairly consistent between the two sites, they also appeared functionally distinct, with palmar CD4 and CD8 T cells exhibiting increased activation compared to those from the hip. Overall, these results define PP skin as a distinct immunological site and suggest special attention should be given to the research of PP presentations of common inflammatory dermatoses.Our second objective was to utilize omics approaches to understand the pathological mechanisms of pansclerotic morphea (PSM), a rare, devastating disease characterized by extensive soft tissue fibrosis, secondary contractions, and significant morbidity. PSM pathogenesis is unknown, and aggressive immunosuppressive treatments rarely slow disease progression. We characterized molecular mechanisms driving PSM using single-cell and spatial RNA-sequencing with immunostaining and in vitro validation. We identified dense myeloid, B cell, and T cell infiltration in PSM lesional skin, with type-II IFN secretion by T cells. A type-II IFN responsive CXCL9+ fibroblast population was enriched in PSM, characterized by increased chemokine and antigen presentation machinery expression. We also identified COL8A1+ myofibroblasts, with enriched TGF-β response and extracellular matrix remodeling functions. Finally, cell-cell interaction analyses revealed cDC2B dendritic cells as a key communication hub between CXCL9+ fibroblasts and COL8A1+ myofibroblasts. Overall, these results define PSM as an autoimmune fibrotic condition centered on type-II IFN responses. This work identified pathogenic circuits between T-cells, cDC2Bs, and myofibroblasts, and suggests JAK1/2 inhibition is a potential therapeutic option in PSM.In addition to their individual findings, these works demonstrate the effective application of omics approaches to address outstanding questions in the field of skin immunology.
■590 ▼aSchool code: 0127.
■650 4▼aImmunology
■650 4▼aDermatology
■650 4▼aCellular biology
■650 4▼aMolecular biology
■653 ▼aHealthy skin
■653 ▼aFibrosis
■653 ▼aRNA sequencing
■653 ▼aPalmoplantar
■690 ▼a0982
■690 ▼a0379
■690 ▼a0757
■690 ▼a0307
■71020▼aUniversity of Michigan▼bImmunology PhD.
■7730 ▼tDissertations Abstracts International▼g87-04B.
■790 ▼a0127
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360883▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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