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The Role of PDGFRβ Signaling in Adipose Tissue Development
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
저자명  
Benvie, Abigail M.
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
키워드  
Platelet derived growth factor-b
기타저자  
Cornell University Nutrition
기본자료저록  
Dissertations Abstracts International. 86-03B.
전자적 위치 및 접속  
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MARC

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■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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