서브메뉴
검색
Mechanisms of Postnatal Mammalian Skin Regeneration
Mechanisms of Postnatal Mammalian Skin Regeneration
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104744
- ISBN
- 9798290650180
- DDC
- 612
- 서명/저자
- Mechanisms of Postnatal Mammalian Skin Regeneration
- 발행사항
- [Sl] : Stanford University, 2023
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2023
- 형태사항
- 262 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-01, Section: B.
- 주기사항
- Advisor: Chan, Charles;Longaker, Michael.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2023.
- 초록/해제
- 요약Wounds in adult skin inevitably heal by scarring, a fibrotic process wherein inflammation and fibroblast proliferation lead to rapid replacement of lost tissue with extracellular matrix proteins. Scars following trauma, burn, and surgeries can inflict psychosocial trauma or result in growth restriction, contractures, and defects in thermoregulation, cumulatively imposing an enormous biomedical burden for hundreds of millions of patients each year. In contrast, skin regeneration, with complete recovery of normal dermal architecture, appendages (hair follicles, glands), and mechanical strength equal to that of unwounded skin, would represent a vastly superior outcome. However, the conditions necessary for such an outcome in postnatal mammalian wound healing remain elusive. As the primary cells responsible for production and reorganization of scar collagen, fibroblasts are key to the wound healing outcome. This dissertation explores skin regeneration, demonstrated for the first time in postnatal mammalian biology, through the lens of fibroblast mechanobiology (i.e., how mechanical forces in the wound environment alter fibroblast behavior).Fibroblasts exhibit remarkable phenotypic variation by origin and location. Limited understanding of such "fibroblast heterogeneity" remains a major barrier to developing proregenerative interventions for skin wounds. Thus, the first half of the Introduction provides an overview of the current conception and controversies surrounding fibroblast heterogeneity, providing three "lenses" through which it may be understood. The second part of the Introduction provides an overview of current mammalian models to study skin scarring and regeneration, with a particular focus on the central role of mechanical forces.Chapter I explores skin regeneration, demonstrated for the first time in postnatal mammalian wounds following targeted modulation of Engrailed-1(En-1) lineage-negativefibroblasts. It was previously reported that the Engrailed-1 lineage of fibroblasts (En-1lineage-positive fibroblasts, or EPFs) is responsible for the vast majority of scar fibrosis. In contrast, the postnatal behavior of En-1lineage-negativefibroblasts (ENFs) was poorly understood. Using fibroblast engraftment and transgenic animal models, I demonstrated that ENFs activate En-1in response to the mechanical forces within the wound environment. In vitroand in vivomouse models with tunable mechanical environments and bulk RNA sequencing revealed that Hippo signaling mediated by Yes-associated protein (YAP) was required for En-1activation. So, I next compared excisional wounds in mice treated with verteporfin, a chemical inhibitor of YAP signaling, with control wounds (PBS), and found that YAP inhibition yielded ENF-mediated wound regeneration without visible scarring within 30 days of healing. Finally, I replicated these observations in multiple transgenic models of inhibited YAP- and En-1-expressing fibroblasts, confirming that mechanotransduction inhibition supports wound regeneration by En-1lineage-negative fibroblasts.Chapter II concerns the specific mechanisms of skin regeneration following YAP inhibition, as compared to scarring (PBS control). I used single cell RNA-sequencing, timsTOF shotgun proteomics, and a novel AI ultrastructural algorithm (described in detail in Chapter IV) to profile regenerating (verteporfin) and scarring (PBS) wounds at multiple time points of healing (post-operative [POD] days 0, 2, 7, 14, and 30), with the goal of defining a signature for regeneration-associated fibroblasts. Using a cell-hashed approach and cross-platform integration at the per-mouse level, I identified Trps1+ (Wnt pathway regulator involved in hair follicle morphogenesis), En-1lineage-negative fibroblasts as key mediators of wound regeneration.
- 일반주제명
- Physiology
- 일반주제명
- Wound healing
- 일반주제명
- Adipocytes
- 일반주제명
- Cytokines
- 일반주제명
- Biology
- 일반주제명
- Scars
- 일반주제명
- Patients
- 일반주제명
- Homeostasis
- 일반주제명
- Gene expression
- 일반주제명
- Medical prognosis
- 일반주제명
- Fibroblasts
- 일반주제명
- Connective tissue
- 일반주제명
- Neural networks
- 일반주제명
- Genetic engineering
- 일반주제명
- Liver cirrhosis
- 일반주제명
- Stem cells
- 일반주제명
- Toxins
- 일반주제명
- Postpartum period
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 87-01B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2023 us c eng d■001000017358735
■00520260202104744
■006m o d
■007cr#unu||||||||
■020 ▼a9798290650180
■035 ▼a(MiAaPQ)AAI32149736
■035 ▼a(MiAaPQ)Stanfordvp805wh3912
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a612
■1001 ▼aMascharak, Shamik.
■24510▼aMechanisms of Postnatal Mammalian Skin Regeneration
■260 ▼a[Sl]▼bStanford University▼c2023
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2023
■300 ▼a262 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-01, Section: B.
■500 ▼aAdvisor: Chan, Charles;Longaker, Michael.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2023.
■520 ▼aWounds in adult skin inevitably heal by scarring, a fibrotic process wherein inflammation and fibroblast proliferation lead to rapid replacement of lost tissue with extracellular matrix proteins. Scars following trauma, burn, and surgeries can inflict psychosocial trauma or result in growth restriction, contractures, and defects in thermoregulation, cumulatively imposing an enormous biomedical burden for hundreds of millions of patients each year. In contrast, skin regeneration, with complete recovery of normal dermal architecture, appendages (hair follicles, glands), and mechanical strength equal to that of unwounded skin, would represent a vastly superior outcome. However, the conditions necessary for such an outcome in postnatal mammalian wound healing remain elusive. As the primary cells responsible for production and reorganization of scar collagen, fibroblasts are key to the wound healing outcome. This dissertation explores skin regeneration, demonstrated for the first time in postnatal mammalian biology, through the lens of fibroblast mechanobiology (i.e., how mechanical forces in the wound environment alter fibroblast behavior).Fibroblasts exhibit remarkable phenotypic variation by origin and location. Limited understanding of such "fibroblast heterogeneity" remains a major barrier to developing proregenerative interventions for skin wounds. Thus, the first half of the Introduction provides an overview of the current conception and controversies surrounding fibroblast heterogeneity, providing three "lenses" through which it may be understood. The second part of the Introduction provides an overview of current mammalian models to study skin scarring and regeneration, with a particular focus on the central role of mechanical forces.Chapter I explores skin regeneration, demonstrated for the first time in postnatal mammalian wounds following targeted modulation of Engrailed-1(En-1) lineage-negativefibroblasts. It was previously reported that the Engrailed-1 lineage of fibroblasts (En-1lineage-positive fibroblasts, or EPFs) is responsible for the vast majority of scar fibrosis. In contrast, the postnatal behavior of En-1lineage-negativefibroblasts (ENFs) was poorly understood. Using fibroblast engraftment and transgenic animal models, I demonstrated that ENFs activate En-1in response to the mechanical forces within the wound environment. In vitroand in vivomouse models with tunable mechanical environments and bulk RNA sequencing revealed that Hippo signaling mediated by Yes-associated protein (YAP) was required for En-1activation. So, I next compared excisional wounds in mice treated with verteporfin, a chemical inhibitor of YAP signaling, with control wounds (PBS), and found that YAP inhibition yielded ENF-mediated wound regeneration without visible scarring within 30 days of healing. Finally, I replicated these observations in multiple transgenic models of inhibited YAP- and En-1-expressing fibroblasts, confirming that mechanotransduction inhibition supports wound regeneration by En-1lineage-negative fibroblasts.Chapter II concerns the specific mechanisms of skin regeneration following YAP inhibition, as compared to scarring (PBS control). I used single cell RNA-sequencing, timsTOF shotgun proteomics, and a novel AI ultrastructural algorithm (described in detail in Chapter IV) to profile regenerating (verteporfin) and scarring (PBS) wounds at multiple time points of healing (post-operative [POD] days 0, 2, 7, 14, and 30), with the goal of defining a signature for regeneration-associated fibroblasts. Using a cell-hashed approach and cross-platform integration at the per-mouse level, I identified Trps1+ (Wnt pathway regulator involved in hair follicle morphogenesis), En-1lineage-negative fibroblasts as key mediators of wound regeneration.
■590 ▼aSchool code: 0212.
■650 4▼aPhysiology
■650 4▼aWound healing
■650 4▼aAdipocytes
■650 4▼aCytokines
■650 4▼aBiology
■650 4▼aScars
■650 4▼aPatients
■650 4▼aHomeostasis
■650 4▼aGene expression
■650 4▼aMedical prognosis
■650 4▼aFibroblasts
■650 4▼aConnective tissue
■650 4▼aNeural networks
■650 4▼aGenetic engineering
■650 4▼aLiver cirrhosis
■650 4▼aStem cells
■650 4▼aToxins
■650 4▼aPostpartum period
■690 ▼a0306
■690 ▼a0719
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g87-01B.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2023
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358735▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


