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A Novel Approach to Measure and Model the Interplay Between Multiple Layers of Cellular Heterogeneity in Glioblastoma
A Novel Approach to Measure and Model the Interplay Between Multiple Layers of Cellular He...
A Novel Approach to Measure and Model the Interplay Between Multiple Layers of Cellular Heterogeneity in Glioblastoma

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211152001
ISBN  
9798384015246
DDC  
574
저자명  
Salatino, Roberto M.
서명/저자  
A Novel Approach to Measure and Model the Interplay Between Multiple Layers of Cellular Heterogeneity in Glioblastoma
발행사항  
[Sl] : The Scripps Research Institute, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
115 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
주기사항  
Advisor: Janiszewska, Michalina.
학위논문주기  
Thesis (Ph.D.)--The Scripps Research Institute, 2024.
초록/해제  
요약Intratumor heterogeneity has been associated with glioblastoma multiforme (GBM) for a long time1-3. The coexistence of heterogeneous cellular sub-populations with distinct genotypes, phenotypes, histological features, and epigenetic states, harbored in varying microenvironments and interconnected in highly resistant networks shapes the identity of this malignancy4-8. This translates into two main scientific challenges. Firstly, comprehensively profile this disease so to capture its complexity and understand its dynamics. Secondly, develop models that recapitulate glioblastoma heterogeneity and can be used to develop therapeutic approaches that simultaneously challenge the milieu of glioblastoma cellular diversity. To help address the first issue we developed a novel cell labelling methodology aimed at generating a high-resolution correlation map between prognostically relevant genetic alterations and associated transcriptional and epigenetic programs. This method termed Specific-top-Allele PCR FACS (STAR-FACS) allows to label individual cells based on a point mutation and selectively perform transcriptome and epigenome profiling of specific genetic clones within a polyclonal landscape. Furthermore, to address the macro spatial differences in glioblastoma composition we collaborated with a neurosurgeon and obtained tumor resections mapped to specific areas of the neoplasm through the Stryker MRI-guided navigation system. This allowed us to identify spatially distinct tumor clusters and tumor micro-environments (TME), hence increasing the resolution of tumor profiling obtained thought single sampling. To provide an interactive framework that would help address the second challenge posed by GBM heterogeneity, we developed cultures from spatially distinct regions of the same tumor and found spatially distinct morphological features, growth rate, metabolism and drug response. This indicates that at the time of the resection GBMs are likely to be already vastly spatially differentiated and the development of effective therapeutic approaches needs to account for this additional level of complexity. With this study we generated an actionable model comprised of 34 cell lines from distinct areas of 8 tumors that can be further exploited to investigate the different evolutionary trajectories imprinted in the different tumor regions.
일반주제명  
Molecular biology
일반주제명  
Oncology
일반주제명  
Cellular biology
키워드  
Cell labelling
키워드  
Glioblastoma heterogeneity
키워드  
Single point mutations
키워드  
Tumor evolution
키워드  
Tumor modeling
기타저자  
The Scripps Research Institute Chemical Biology
기본자료저록  
Dissertations Abstracts International. 86-02B.
전자적 위치 및 접속  
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MARC

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■035    ▼a(MiAaPQ)AAI31329954
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a574
■1001  ▼aSalatino,  Roberto  M.
■24512▼aA  Novel  Approach  to  Measure  and  Model  the  Interplay  Between  Multiple  Layers  of  Cellular  Heterogeneity  in  Glioblastoma
■260    ▼a[Sl]▼bThe  Scripps  Research  Institute▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a115  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-02,  Section:  B.
■500    ▼aAdvisor:  Janiszewska,  Michalina.
■5021  ▼aThesis  (Ph.D.)--The  Scripps  Research  Institute,  2024.
■520    ▼aIntratumor  heterogeneity  has  been  associated  with  glioblastoma  multiforme  (GBM)  for  a  long  time1-3.  The  coexistence  of  heterogeneous  cellular  sub-populations  with  distinct  genotypes,  phenotypes,  histological  features,  and  epigenetic  states,  harbored  in  varying  microenvironments  and  interconnected  in  highly  resistant  networks  shapes  the  identity  of  this  malignancy4-8.  This  translates  into  two  main  scientific  challenges.  Firstly,  comprehensively  profile  this  disease  so  to  capture  its  complexity  and  understand  its  dynamics.  Secondly,  develop  models  that  recapitulate  glioblastoma  heterogeneity  and  can  be  used  to  develop  therapeutic  approaches  that  simultaneously  challenge  the  milieu  of  glioblastoma  cellular  diversity.  To  help  address  the  first  issue  we  developed  a  novel  cell  labelling  methodology  aimed  at  generating  a  high-resolution  correlation  map  between  prognostically  relevant  genetic  alterations  and  associated  transcriptional  and  epigenetic  programs.  This  method  termed  Specific-top-Allele  PCR  FACS  (STAR-FACS)  allows  to  label  individual  cells  based  on  a  point  mutation  and  selectively  perform  transcriptome  and  epigenome  profiling  of  specific  genetic  clones  within  a  polyclonal  landscape.  Furthermore,  to  address  the  macro  spatial  differences  in  glioblastoma  composition  we  collaborated  with  a  neurosurgeon  and  obtained  tumor  resections  mapped  to  specific  areas  of  the  neoplasm  through  the  Stryker  MRI-guided  navigation  system.  This  allowed  us  to  identify  spatially  distinct  tumor  clusters  and  tumor  micro-environments  (TME),  hence  increasing  the  resolution  of  tumor  profiling  obtained  thought  single  sampling.  To  provide  an  interactive  framework  that  would  help  address  the  second  challenge  posed  by  GBM  heterogeneity,  we  developed  cultures  from  spatially  distinct  regions  of  the  same  tumor  and  found  spatially  distinct  morphological  features,  growth  rate,  metabolism  and  drug  response.  This  indicates  that  at  the  time  of  the  resection  GBMs  are  likely  to  be  already  vastly  spatially  differentiated  and  the  development  of  effective  therapeutic  approaches  needs  to  account  for  this  additional  level  of  complexity.  With  this  study  we  generated  an  actionable  model  comprised  of  34  cell  lines  from  distinct  areas  of  8  tumors  that  can  be  further  exploited  to  investigate  the  different  evolutionary  trajectories  imprinted  in  the  different  tumor  regions.
■590    ▼aSchool  code:  1179.
■650  4▼aMolecular  biology
■650  4▼aOncology
■650  4▼aCellular  biology
■653    ▼aCell  labelling
■653    ▼aGlioblastoma  heterogeneity
■653    ▼aSingle  point  mutations
■653    ▼aTumor  evolution
■653    ▼aTumor  modeling
■690    ▼a0307
■690    ▼a0992
■690    ▼a0379
■71020▼aThe  Scripps  Research  Institute▼bChemical  Biology.
■7730  ▼tDissertations  Abstracts  International▼g86-02B.
■790    ▼a1179
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162340▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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