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Exploring Therapeutic Vulnerabilities of Bladder Cancer
Exploring Therapeutic Vulnerabilities of Bladder Cancer
Exploring Therapeutic Vulnerabilities of Bladder Cancer

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202103530
ISBN  
9798291561515
DDC  
615
저자명  
Truong, Andrew S.
서명/저자  
Exploring Therapeutic Vulnerabilities of Bladder Cancer
발행사항  
[Sl] : The University of North Carolina at Chapel Hill, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
138 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
주기사항  
Advisor: Kim, William.
학위논문주기  
Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2025.
초록/해제  
요약APOBEC3A and APOBEC3B are highly expressed in bladder cancer. Concomitantly, up to 70% of mutations found in bladder cancer, which is among the cancer type with the highest frequency of mutations, can be attributed to APOBEC3 mutagenesis. We introduced a novel, Cre-inducible, mouse model (UPPA) that allows urothelial specific overexpression of mouse Apobec3 (mApobec3) and concomitant inactivation of tumor suppressors PTEN and p53. We found mApobec3 shortened tumor latency in UPPA mice compared to our control model UPP. Additionally, UPPA mice had high incidence of lung metastases and the tumors exhibited extensive squamous feature. We confirmed the role of mApobec3 in promoting squamous differentiation and metastasis using in vitro doxycycline-inducible cell line model and uncovered IL1α/AP-1 pathway as the mediator of these mApobec3-induced phenotypes. Strikingly, we found that among the human APOBEC3 enzymes, only APOBEC3A is associated with squamous differentiation even though both APOBEC3A and APOBEC3B contribute to the mutational landscape in bladder cancer.Bladder cancer harbor a high frequency of mutations that are primarily caused by APOBEC3 mutagenesis. A portion of these mutations are expressed, processed, and presented as peptide neoantigens on the surface of tumor cells. These neoantigens can be targeted by T cells and thereby result in elimination of cancer cells. In Chapter 3, we examined the efficacy of entinostat, an HDAC1/3 inhibitor, for bladder cancer. We uncovered that, in addition to previously reported mechanisms, entinostat induces anti-tumor immune responses through modulating the expression of silent tumor neoantigens.While both APOBEC3A and APOBEC3B mutagenic activity contributes to the tumor mutational burden in bladder cancer, which is an important predictor of immunotherapy response, squamous differentiation has been suggested as a mechanism of therapy resistance. Therefore, additional research on APOBEC3A and specific inhibitor for this enzyme are warranted and potentially beneficial for bladder cancer treatment.
일반주제명  
Pharmacology
일반주제명  
Oncology
일반주제명  
Immunology
키워드  
Bladder cancer
키워드  
Immunotherapy
키워드  
Squamous differentiation
기타저자  
The University of North Carolina at Chapel Hill Pharmacology
기본자료저록  
Dissertations Abstracts International. 87-02B.
전자적 위치 및 접속  
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MARC

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■020    ▼a9798291561515
■035    ▼a(MiAaPQ)AAI32039847
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a615
■1001  ▼aTruong,  Andrew  S.
■24510▼aExploring  Therapeutic  Vulnerabilities  of  Bladder  Cancer
■260    ▼a[Sl]▼bThe  University  of  North  Carolina  at  Chapel  Hill▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a138  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-02,  Section:  B.
■500    ▼aAdvisor:  Kim,  William.
■5021  ▼aThesis  (Ph.D.)--The  University  of  North  Carolina  at  Chapel  Hill,  2025.
■520    ▼aAPOBEC3A  and  APOBEC3B  are  highly  expressed  in  bladder  cancer.  Concomitantly,  up  to  70%  of  mutations  found  in  bladder  cancer,  which  is  among  the  cancer  type  with  the  highest  frequency  of  mutations,  can  be  attributed  to  APOBEC3  mutagenesis.  We  introduced  a  novel,  Cre-inducible,  mouse  model  (UPPA)  that  allows  urothelial  specific  overexpression  of  mouse  Apobec3  (mApobec3)  and  concomitant  inactivation  of  tumor  suppressors  PTEN  and  p53.  We  found  mApobec3  shortened  tumor  latency  in  UPPA  mice  compared  to  our  control  model  UPP.  Additionally,  UPPA  mice  had  high  incidence  of  lung  metastases  and  the  tumors  exhibited  extensive  squamous  feature.  We  confirmed  the  role  of  mApobec3  in  promoting  squamous  differentiation  and  metastasis  using  in  vitro  doxycycline-inducible  cell  line  model  and  uncovered  IL1α/AP-1  pathway  as  the  mediator  of  these  mApobec3-induced  phenotypes.  Strikingly,  we  found  that  among  the  human  APOBEC3  enzymes,  only  APOBEC3A  is  associated  with  squamous  differentiation  even  though  both  APOBEC3A  and  APOBEC3B  contribute  to  the  mutational  landscape  in  bladder  cancer.Bladder  cancer  harbor  a  high  frequency  of  mutations  that  are  primarily  caused  by  APOBEC3  mutagenesis.  A  portion  of  these  mutations  are  expressed,  processed,  and  presented  as  peptide  neoantigens  on  the  surface  of  tumor  cells.  These  neoantigens  can  be  targeted  by  T  cells  and  thereby  result  in  elimination  of  cancer  cells.  In  Chapter  3,  we  examined  the  efficacy  of  entinostat,  an  HDAC1/3  inhibitor,  for  bladder  cancer.  We  uncovered  that,  in  addition  to  previously  reported  mechanisms,  entinostat  induces  anti-tumor  immune  responses  through  modulating  the  expression  of  silent  tumor  neoantigens.While  both  APOBEC3A  and  APOBEC3B  mutagenic  activity  contributes  to  the  tumor  mutational  burden  in  bladder  cancer,  which  is  an  important  predictor  of  immunotherapy  response,  squamous  differentiation  has  been  suggested  as  a  mechanism  of  therapy  resistance.  Therefore,  additional  research  on  APOBEC3A  and  specific  inhibitor  for  this  enzyme  are  warranted  and  potentially  beneficial  for  bladder  cancer  treatment.
■590    ▼aSchool  code:  0153.
■650  4▼aPharmacology
■650  4▼aOncology
■650  4▼aImmunology
■653    ▼aBladder  cancer
■653    ▼aImmunotherapy
■653    ▼aSquamous  differentiation
■690    ▼a0419
■690    ▼a0992
■690    ▼a0982
■71020▼aThe  University  of  North  Carolina  at  Chapel  Hill▼bPharmacology.
■7730  ▼tDissertations  Abstracts  International▼g87-02B.
■790    ▼a0153
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357568▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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