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The Role of PDGFRβ Signaling in Adipose Tissue Development
The Role of PDGFRβ Signaling in Adipose Tissue Development
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152712
- ISBN
- 9798384053743
- DDC
- 641
- 서명/저자
- The Role of PDGFRβ Signaling in Adipose Tissue Development
- 발행사항
- [Sl] : Cornell University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 300 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
- 주기사항
- Advisor: Berry, Daniel.
- 학위논문주기
- Thesis (Ph.D.)--Cornell University, 2024.
- 초록/해제
- 요약In just the past few decades, the prevalence of obesity has nearly tripled worldwide, with the main driver of this growing epidemic being an imbalance in energy metabolism. Here, energy in dominates energy out resulting in the pathological expansion and remodeling of one's white adipose tissue (WAT). This is often accompanied by metabolic diseases such as type 2 diabetes, cardiovascular disease, and ectopic fat accumulation. Contrary to energy storing WAT, mammals also contain thermogenic fat cells- brown and beige adipocytes. Thermogenic fat possesses the unique ability to utilize substrates such as glucose and fatty acids to produce heat. Therefore, the generation of thermogenic fat has great clinical utility in targeting metabolically unhealthy WAT. However, thermogenic fat presence as well as function declines with both age and obesity. Thus, understanding the molecular pathways and mechanisms that regulate both white and thermogenic fat development and function is critical for the generation of therapies to thwart obesity and metabolic syndrome. Here, we identify platelet derived growth factor-b (PDGFRb) signaling as a regulator of both WAT and beige fat development. PDGFRb is a membrane bound receptor tyrosine kinase involved in numerous signal transduction pathways. We have found that deleting PDGFRb in white adipocyte progenitor cells (APCs) impairs adult WAT homeostasis, resulting in lipodystrophy, fibrotic tissue accumulation and immune cell infiltration. Mechanistically, PDGFRb is essential in specification of the adult white APC lineage, with embryonic deletion of PDGFRb in adult white APCs resulting in a lineage switch. PDGFRb deficient APCs instead develop into macrophages, not white adipocytes, impairing adult WAT function. In contrast to white fat development, we have additionally uncovered the role of PDGFRb in cold induced beige fat development. Here, we find that PDGFRb expression increases in beige APCs throughout the aging process to negatively regulate beige fat formation via downstream Stat1 phosphorylation. Deleting PDGFRb in aged beige APCs restores beige fat generation in response to cold temperature challenge. Interestingly however, loss of PDGFRb in aged beige APCs does not restore their ability to undergo beige adipogenesis. Instead, we find that with aging, the immune cell composition within the adipose tissue niche is disrupted, hindering beige fat formation. Targeting the PDGFRbStat1 pathway, either genetically or pharmacologically, restores the presence and activation of these immune cells to promote beiging and improve whole body metabolism. Overall, these studies highlight the PDGFRb signaling pathway as a promising potential target in combatting the current obesity epidemic.
- 일반주제명
- Nutrition
- 일반주제명
- Cellular biology
- 일반주제명
- Molecular biology
- 일반주제명
- Developmental biology
- 일반주제명
- Endocrinology
- 키워드
- Adipose tissue
- 키워드
- Metabolism
- 키워드
- Stem cells
- 키워드
- Thermogenesis
- 기타저자
- Cornell University Nutrition
- 기본자료저록
- Dissertations Abstracts International. 86-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152712
■006m o d
■007cr#unu||||||||
■020 ▼a9798384053743
■035 ▼a(MiAaPQ)AAI31488763
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a641
■1001 ▼aBenvie, Abigail M.▼0(orcid)0000-0002-0160-1890
■24510▼aThe Role of PDGFRβ Signaling in Adipose Tissue Development
■260 ▼a[Sl]▼bCornell University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a300 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-03, Section: B.
■500 ▼aAdvisor: Berry, Daniel.
■5021 ▼aThesis (Ph.D.)--Cornell University, 2024.
■520 ▼aIn just the past few decades, the prevalence of obesity has nearly tripled worldwide, with the main driver of this growing epidemic being an imbalance in energy metabolism. Here, energy in dominates energy out resulting in the pathological expansion and remodeling of one's white adipose tissue (WAT). This is often accompanied by metabolic diseases such as type 2 diabetes, cardiovascular disease, and ectopic fat accumulation. Contrary to energy storing WAT, mammals also contain thermogenic fat cells- brown and beige adipocytes. Thermogenic fat possesses the unique ability to utilize substrates such as glucose and fatty acids to produce heat. Therefore, the generation of thermogenic fat has great clinical utility in targeting metabolically unhealthy WAT. However, thermogenic fat presence as well as function declines with both age and obesity. Thus, understanding the molecular pathways and mechanisms that regulate both white and thermogenic fat development and function is critical for the generation of therapies to thwart obesity and metabolic syndrome. Here, we identify platelet derived growth factor-b (PDGFRb) signaling as a regulator of both WAT and beige fat development. PDGFRb is a membrane bound receptor tyrosine kinase involved in numerous signal transduction pathways. We have found that deleting PDGFRb in white adipocyte progenitor cells (APCs) impairs adult WAT homeostasis, resulting in lipodystrophy, fibrotic tissue accumulation and immune cell infiltration. Mechanistically, PDGFRb is essential in specification of the adult white APC lineage, with embryonic deletion of PDGFRb in adult white APCs resulting in a lineage switch. PDGFRb deficient APCs instead develop into macrophages, not white adipocytes, impairing adult WAT function. In contrast to white fat development, we have additionally uncovered the role of PDGFRb in cold induced beige fat development. Here, we find that PDGFRb expression increases in beige APCs throughout the aging process to negatively regulate beige fat formation via downstream Stat1 phosphorylation. Deleting PDGFRb in aged beige APCs restores beige fat generation in response to cold temperature challenge. Interestingly however, loss of PDGFRb in aged beige APCs does not restore their ability to undergo beige adipogenesis. Instead, we find that with aging, the immune cell composition within the adipose tissue niche is disrupted, hindering beige fat formation. Targeting the PDGFRbStat1 pathway, either genetically or pharmacologically, restores the presence and activation of these immune cells to promote beiging and improve whole body metabolism. Overall, these studies highlight the PDGFRb signaling pathway as a promising potential target in combatting the current obesity epidemic.
■590 ▼aSchool code: 0058.
■650 4▼aNutrition
■650 4▼aCellular biology
■650 4▼aMolecular biology
■650 4▼aDevelopmental biology
■650 4▼aEndocrinology
■653 ▼aAdipose tissue
■653 ▼aMetabolism
■653 ▼aStem cells
■653 ▼aThermogenesis
■653 ▼aPlatelet derived growth factor-b
■690 ▼a0570
■690 ▼a0379
■690 ▼a0409
■690 ▼a0758
■690 ▼a0307
■71020▼aCornell University▼bNutrition.
■7730 ▼tDissertations Abstracts International▼g86-03B.
■790 ▼a0058
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163472▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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