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Metabolic Networks in Pancreatic Cancer- [electronic resource]
Metabolic Networks in Pancreatic Cancer - [electronic resource]
Metabolic Networks in Pancreatic Cancer- [electronic resource]

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자료유형  
 학위논문파일 국외
최종처리일시  
20240214101944
ISBN  
9798380371018
DDC  
574
저자명  
Kerk, Samuel A.
서명/저자  
Metabolic Networks in Pancreatic Cancer - [electronic resource]
발행사항  
[S.l.]: : University of Michigan., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(282 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
주기사항  
Advisor: Parent, Carole A.
학위논문주기  
Thesis (Ph.D.)--University of Michigan, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
사용제한주기  
This item must not be added to any third party search indexes.
초록/해제  
요약Cancer metabolism involves the mechanisms by which transformed cells utilize nutrients to sustain oncogenic programs. Cell-intrinsic rewiring of metabolism inherent to the tissue of origin is directed by activation of oncogenic drivers and loss of tumor suppressors. Cell-extrinsic metabolic crosstalk is determined by tissue architecture and resident cellular populations as well as nutrient availability. Together, this dysregulated metabolism promotes the overall growth and survival of cancer cells. Furthermore, distinct metabolic requirements of cancer cells present potential therapeutic opportunities.My thesis work has focused on cancer metabolism in the context of pancreatic cancer, a deadly disease for which effective alternative treatment strategies are desperately needed. As background, Chapter 1 presents a comprehensive and nuanced review on the current knowledge of pancreatic cancer metabolism, compared and contrasted with lung and colon cancer. This introductory chapter covers 1) how activation of oncogenic driver genes and/or loss of tumor-suppressor genes influence metabolic pathways in pancreatic cancer, 2) distinct metabolic programs inherent to the cells/tissue of origin, 3) unique metabolic crosstalk determined by tissue architecture, and 4) potential therapeutic inroads targeting tumor metabolism.Chapter 2 describes the identification of a novel nutrient scavenging pathway in pancreatic cancer cells. Critical glycosylation products needed for post-translation protein modifications are synthesized de novo using the hexosamine biosynthesis pathway (HBP). However, pancreatic cancer cells are able to compensate for inhibition of this pathway by scavenging downstream products from the extracellular environment. Dual inhibition of both the HBP and scavenging mechanisms blocked this metabolic rewiring. The remaining chapters of this dissertation center on mitochondrial glutamate-oxaloacetate transaminase 2 (GOT2), beginning with a review of the current literature related to GOT2 in cancer (Chapter 3). Chapter 4 demonstrates while GOT2 is required for in vitro pancreatic cancer cell proliferation, loss of GOT2 has no effect on the growth of pancreatic tumor growth and progression in vivo. GOT2 loss leads to intracellular reductive stress which can be ameliorated through uptake of environmental pyruvate in tumors. The generation of novel, physiologically relevant genetically engineered mouse models of GOT2 loss in murine pancreatic tumorigenesis and tumor growth is presented in Chapter 5, further supporting the finding that GOT2 is dispensable for in vivo pancreatic tumor growth.Chapter 6 delves into the metabolic reprogramming of pro-tumorigenic immune cells in the pancreatic tumor microenvironment using genetic models of Got1 or Got2 deletion in myeloid cells. Specifically, tumor-associated macrophages have been implicated in chemoresistance, immunosuppression, and pro-growth signaling in pancreatic cancer. Since Got1/Got2-related metabolism underlies several of these mechanisms, this chapter contains preliminary data using both ex vivo and in vivo models to determine if targeting Got1/Got2 metabolism in myeloid cells is a viable strategy to reprogram macrophages from pro- to anti-tumorigenic states in pancreatic tumors.The metabolic pathways necessary during development are often inappropriately re-activated in cancer. Therefore, understanding metabolic developmental defects can shed light on cancer metabolism. Indeed, global, constitutive deletion of Got2 is embryonic lethal in mice and inducible deletion in adult mice results in body weight loss and a failure to thrive. Chapter 7 characterizes the phenotypes involving Got2 loss in both embryonic and adult mice and proposes future interventions to resolve this metabolic defect, drawing from knowledge gleaned studying the role of GOT2 in pancreatic cancer. Finally, Chapter 8 concludes this dissertation by discussing future directions and highlighting key concepts in cancer metabolism.
일반주제명  
Biochemistry.
일반주제명  
Cellular biology.
일반주제명  
Genetics.
키워드  
Pancreatic ductal adenocarcinoma
키워드  
Cancer metabolism
키워드  
Cancer biology
키워드  
Myeloid cells
키워드  
Tumor growth
기타저자  
University of Michigan Cancer Biology
기본자료저록  
Dissertations Abstracts International. 85-03B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
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■1001  ▼aKerk,  Samuel  A.
■24510▼aMetabolic  Networks  in  Pancreatic  Cancer▼h[electronic  resource]
■260    ▼a[S.l.]:▼bUniversity  of  Michigan.  ▼c2023
■260  1▼aAnn  Arbor  :▼bProQuest  Dissertations  &  Theses,  ▼c2023
■300    ▼a1  online  resource(282  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-03,  Section:  B.
■500    ▼aAdvisor:  Parent,  Carole  A.
■5021  ▼aThesis  (Ph.D.)--University  of  Michigan,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■506    ▼aThis  item  must  not  be  added  to  any  third  party  search  indexes.
■520    ▼aCancer  metabolism  involves  the  mechanisms  by  which  transformed  cells  utilize  nutrients  to  sustain  oncogenic  programs.  Cell-intrinsic  rewiring  of  metabolism  inherent  to  the  tissue  of  origin  is  directed  by  activation  of  oncogenic  drivers  and  loss  of  tumor  suppressors.  Cell-extrinsic  metabolic  crosstalk  is  determined  by  tissue  architecture  and  resident  cellular  populations  as  well  as  nutrient  availability.  Together,  this  dysregulated  metabolism  promotes  the  overall  growth  and  survival  of  cancer  cells.  Furthermore,  distinct  metabolic  requirements  of  cancer  cells  present  potential  therapeutic  opportunities.My  thesis  work  has  focused  on  cancer  metabolism  in  the  context  of  pancreatic  cancer,  a  deadly  disease  for  which  effective  alternative  treatment  strategies  are  desperately  needed.  As  background,  Chapter  1  presents  a  comprehensive  and  nuanced  review  on  the  current  knowledge  of  pancreatic  cancer  metabolism,  compared  and  contrasted  with  lung  and  colon  cancer.  This  introductory  chapter  covers  1)  how  activation  of  oncogenic  driver  genes  and/or  loss  of  tumor-suppressor  genes  influence  metabolic  pathways  in  pancreatic  cancer,  2)  distinct  metabolic  programs  inherent  to  the  cells/tissue  of  origin,  3)  unique  metabolic  crosstalk  determined  by  tissue  architecture,  and  4)  potential  therapeutic  inroads  targeting  tumor  metabolism.Chapter  2  describes  the  identification  of  a  novel  nutrient  scavenging  pathway  in  pancreatic  cancer  cells.  Critical  glycosylation  products  needed  for  post-translation  protein  modifications  are  synthesized  de  novo  using  the  hexosamine  biosynthesis pathway  (HBP).  However,  pancreatic  cancer  cells  are  able  to  compensate  for  inhibition  of  this  pathway  by  scavenging  downstream  products  from  the  extracellular  environment.  Dual  inhibition  of  both  the  HBP  and  scavenging  mechanisms  blocked  this  metabolic  rewiring. The  remaining  chapters  of  this  dissertation  center  on  mitochondrial  glutamate-oxaloacetate  transaminase  2  (GOT2),  beginning  with  a  review  of  the  current  literature  related  to  GOT2  in  cancer  (Chapter  3).  Chapter  4  demonstrates  while  GOT2  is  required  for  in  vitro  pancreatic  cancer  cell  proliferation,  loss  of  GOT2  has  no  effect  on  the  growth  of  pancreatic  tumor  growth  and  progression  in  vivo.  GOT2  loss  leads  to  intracellular  reductive  stress  which  can  be  ameliorated  through  uptake  of  environmental  pyruvate  in  tumors.  The  generation  of  novel,  physiologically  relevant  genetically  engineered  mouse  models  of  GOT2  loss  in  murine  pancreatic  tumorigenesis  and  tumor  growth  is  presented  in  Chapter  5,  further  supporting  the  finding  that  GOT2  is  dispensable  for  in  vivo  pancreatic  tumor  growth.Chapter  6  delves  into  the  metabolic  reprogramming  of  pro-tumorigenic  immune  cells  in  the  pancreatic  tumor  microenvironment  using  genetic  models  of  Got1  or  Got2  deletion  in  myeloid  cells.  Specifically,  tumor-associated  macrophages  have  been  implicated  in  chemoresistance,  immunosuppression,  and  pro-growth  signaling  in  pancreatic  cancer.  Since  Got1/Got2-related  metabolism  underlies  several  of  these  mechanisms,  this  chapter  contains  preliminary  data  using  both  ex  vivo  and  in  vivo  models  to  determine  if  targeting  Got1/Got2  metabolism  in  myeloid  cells  is  a  viable  strategy  to  reprogram  macrophages  from  pro-  to  anti-tumorigenic  states  in  pancreatic  tumors.The  metabolic  pathways  necessary  during  development  are  often  inappropriately  re-activated  in  cancer.  Therefore,  understanding  metabolic  developmental  defects  can  shed  light  on  cancer  metabolism.  Indeed,  global,  constitutive  deletion  of  Got2  is  embryonic  lethal  in  mice  and  inducible  deletion  in  adult  mice  results  in  body  weight  loss  and  a  failure  to  thrive.  Chapter  7  characterizes  the  phenotypes  involving  Got2  loss  in  both  embryonic  and  adult  mice  and  proposes  future  interventions  to  resolve  this  metabolic  defect,  drawing  from  knowledge  gleaned  studying  the  role  of  GOT2  in  pancreatic  cancer.  Finally,  Chapter  8  concludes  this  dissertation  by  discussing  future  directions  and  highlighting  key  concepts  in  cancer  metabolism.
■590    ▼aSchool  code:  0127.
■650  4▼aBiochemistry.
■650  4▼aCellular  biology.
■650  4▼aGenetics.
■653    ▼aPancreatic  ductal  adenocarcinoma
■653    ▼aCancer  metabolism
■653    ▼aCancer  biology
■653    ▼aMyeloid  cells
■653    ▼aTumor  growth
■690    ▼a0487
■690    ▼a0379
■690    ▼a0369
■71020▼aUniversity  of  Michigan▼bCancer  Biology.
■7730  ▼tDissertations  Abstracts  International▼g85-03B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0127
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16935535▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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