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Palmoptosis: A Novel Form of Non-Apoptotic Cell Death
Palmoptosis: A Novel Form of Non-Apoptotic Cell Death
Palmoptosis: A Novel Form of Non-Apoptotic Cell Death

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자료유형  
 학위논문 서양
최종처리일시  
20260202105623
ISBN  
9798265427816
DDC  
616
저자명  
Leak, Logan.
서명/저자  
Palmoptosis: A Novel Form of Non-Apoptotic Cell Death
발행사항  
[Sl] : Stanford University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
111 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Dixon, Scott.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2024.
초록/해제  
요약The most well-studied form of cell death is apoptosis, a form of cell suicide in which executioner proteolytic enzymes called caspases degrade intracellular proteins as part of a cell death cascade. Since the discovery of apoptosis in 1972, there have been a variety of other distinct non-apoptotic cell death pathways that have been discovered, differing in form and physiological and pathological relevance. Here, I describe one such novel non-apoptotic cell death pathway that we term "palmoptosis" due to the importance of the 16-carbon saturated fatty acid palmitate in its execution. This form of cell death is executed by the synthetic small molecule caspase-independent lethal 56 (CIL56) which was discovered in a chemical biology screen for inducers of caspase-independent cell death. From a CIL56 chemical genetic CRISPR screen, we identified novel supressors of this form of cell death. This screen, along with two published CIL56 chemical genetic screens in different systems, identified that knockout of trans-2,3-enoyl CoA reductase, or TECR, consistently resulted in significantly less cell death in the presence of CIL56. We generated multiple TECR gene-disrupted cell lines to understand how this enzyme may promote cell death. In brief, palmitate, and the related monounsaturated fatty acid trans-2-hexadecenoic acid, promote cell death in a TECR-dependent manner. This form of cell death is also triggered by a clinical candidate drug Tegavivint, a small molecule derived from the CIL56 backbone. In a human sarcoma xenograft model, Tegavivint reduces tumor growth in a TECR-dependent manner, suggesting that palmoptosis can be triggered in vivo to prevent tumor growth. A better understanding of the palmoptosis mechanism and additional validation in preclinical models may guide treatment decisions and interventions for the ongoing clinical trials investigating the anti-tumor effects of tegavivint.
일반주제명  
Cancer
일반주제명  
Physiology
일반주제명  
Protein synthesis
일반주제명  
Cell death
일반주제명  
Neutrophils
일반주제명  
Disease
일반주제명  
Vitamin C
일반주제명  
Ferroptosis
일반주제명  
Clinical trials
일반주제명  
Breakdowns
일반주제명  
Metabolism
일반주제명  
Lipids
일반주제명  
Apoptosis
일반주제명  
Cell cycle
일반주제명  
Cellular biology
일반주제명  
Pharmaceutical sciences
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
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MARC

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■0820  ▼a616
■1001  ▼aLeak,  Logan.
■24510▼aPalmoptosis:  A  Novel  Form  of  Non-Apoptotic  Cell  Death
■260    ▼a[Sl]▼bStanford  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a111  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Dixon,  Scott.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2024.
■520    ▼aThe  most  well-studied  form  of  cell  death  is  apoptosis,  a  form  of  cell  suicide  in  which  executioner  proteolytic  enzymes  called  caspases  degrade  intracellular  proteins  as  part  of  a  cell  death  cascade.  Since  the  discovery  of  apoptosis  in  1972,  there  have  been  a  variety  of  other  distinct  non-apoptotic  cell  death  pathways  that  have  been  discovered,  differing  in  form  and  physiological  and  pathological  relevance.  Here,  I  describe  one  such  novel  non-apoptotic  cell  death  pathway  that  we  term  "palmoptosis"  due  to  the  importance  of  the  16-carbon  saturated  fatty  acid  palmitate  in  its  execution.  This  form  of  cell  death  is  executed  by  the  synthetic  small  molecule  caspase-independent  lethal  56  (CIL56)  which  was  discovered  in  a  chemical  biology  screen  for  inducers  of  caspase-independent  cell  death.  From  a  CIL56  chemical  genetic  CRISPR  screen,  we  identified  novel  supressors  of  this  form  of  cell  death.  This  screen,  along  with  two  published  CIL56  chemical  genetic  screens  in  different  systems,  identified  that  knockout  of  trans-2,3-enoyl  CoA  reductase,  or  TECR,  consistently  resulted  in  significantly  less  cell  death  in  the  presence  of  CIL56.  We  generated  multiple  TECR  gene-disrupted  cell  lines  to  understand  how  this  enzyme  may  promote  cell  death.  In  brief,  palmitate,  and  the  related  monounsaturated  fatty  acid  trans-2-hexadecenoic  acid,  promote  cell  death  in  a  TECR-dependent  manner.  This  form  of  cell  death  is  also  triggered  by  a  clinical  candidate  drug  Tegavivint,  a  small  molecule  derived  from  the  CIL56  backbone.  In  a  human  sarcoma  xenograft  model,  Tegavivint  reduces  tumor  growth  in  a  TECR-dependent  manner,  suggesting  that  palmoptosis  can  be  triggered  in  vivo  to  prevent  tumor  growth.  A  better  understanding  of  the  palmoptosis  mechanism  and  additional  validation  in  preclinical  models  may  guide  treatment  decisions  and  interventions  for  the  ongoing  clinical  trials  investigating  the  anti-tumor  effects  of  tegavivint.
■590    ▼aSchool  code:  0212.
■650  4▼aCancer
■650  4▼aPhysiology
■650  4▼aProtein  synthesis
■650  4▼aCell  death
■650  4▼aNeutrophils
■650  4▼aDisease
■650  4▼aVitamin  C
■650  4▼aFerroptosis
■650  4▼aClinical  trials
■650  4▼aBreakdowns
■650  4▼aMetabolism
■650  4▼aLipids
■650  4▼aApoptosis
■650  4▼aCell  cycle
■650  4▼aCellular  biology
■650  4▼aPharmaceutical  sciences
■690    ▼a0719
■690    ▼a0379
■690    ▼a0572
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360816▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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