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Computational Methods for Inferring Mechanisms of Biological Heterogeneity in Single-Cell Data
Computational Methods for Inferring Mechanisms of Biological Heterogeneity in Single-Cell ...
Computational Methods for Inferring Mechanisms of Biological Heterogeneity in Single-Cell Data

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211152817
ISBN  
9798384098782
DDC  
004
저자명  
Persad, Sitara Camini.
서명/저자  
Computational Methods for Inferring Mechanisms of Biological Heterogeneity in Single-Cell Data
발행사항  
[Sl] : Columbia University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
219 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
주기사항  
Advisor: Pe'er, Itsik.
학위논문주기  
Thesis (Ph.D.)--Columbia University, 2024.
초록/해제  
요약Single-cell sequencing techniques, such as single-cell RNA sequencing (scRNA-seq) and single-cell ATAC sequencing (scATAC-seq), have revolutionized our understanding of cellular diversity and function. Genetic and epigenetic factors influence phenotypic heterogeneity in ways that are just beginning to be understood. In this work, we develop methods for inferring mechanisms of biological heterogeneity in single-cell data, with particular applications to cancer biology. First, we develop a kernel archetype analysis method for overcoming noise and sparsity in single-cell data by aggregating single cells into high-resolution cell states. We show that the proposed approach captures robust and biologically meaningful cell states and enables the inference of epigenetic regulation of phenotypic heterogeneity. In the second part of this thesis, we develop methods for linking genotypic and phenotypic information, first by using aggregated single-cell RNA sequencing and a hidden Markov model to infer copy number variation. We demonstrate that aggregation improves copy number inference over existing approaches. We then integrate DNA sequencing with single-cell RNA sequencing to infer copy number profiles in a rapid autopsy of a patient with metastatic pancreatic cancer. We develop a scalable algorithm for inferring phylogenetic relationships between cells from noisy copy number profiles. We show that our approach more accurately recovers phylogenetic relationships between cells and apply it to understand the relationship between genotype and phenotype in metastatic cancer. Finally, we develop a metric for quantifying the extent to which genotype determines phenotype in lineage tracing data. We show that it more accurately quantifies phenotypic plasticity compared to existing approaches. Altogether, these methods can be used to help uncover the mechanisms underlying phenotypic heterogeneity in biological systems.
일반주제명  
Computer science
일반주제명  
Biostatistics
일반주제명  
Biology
일반주제명  
Bioinformatics
일반주제명  
Genetics
키워드  
Inferring mechanisms
키워드  
Biological heterogeneity
키워드  
Single-cell data
키워드  
Single-cell RNA sequencing
키워드  
Cancer
기타저자  
Columbia University Computer Science
기본자료저록  
Dissertations Abstracts International. 86-03B.
전자적 위치 및 접속  
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MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
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■1001  ▼aPersad,  Sitara  Camini.
■24510▼aComputational  Methods  for  Inferring  Mechanisms  of  Biological  Heterogeneity  in  Single-Cell  Data
■260    ▼a[Sl]▼bColumbia  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a219  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-03,  Section:  B.
■500    ▼aAdvisor:  Pe'er,  Itsik.
■5021  ▼aThesis  (Ph.D.)--Columbia  University,  2024.
■520    ▼aSingle-cell  sequencing  techniques,  such  as  single-cell  RNA  sequencing  (scRNA-seq)  and  single-cell  ATAC  sequencing  (scATAC-seq),  have  revolutionized  our  understanding  of  cellular  diversity  and  function.  Genetic  and  epigenetic  factors  influence  phenotypic  heterogeneity  in  ways  that  are  just  beginning  to  be  understood.  In  this  work,  we  develop  methods  for  inferring  mechanisms  of  biological  heterogeneity  in  single-cell  data,  with  particular  applications  to  cancer  biology.  First,  we  develop  a  kernel  archetype  analysis  method  for  overcoming  noise  and  sparsity  in  single-cell  data  by  aggregating  single  cells  into  high-resolution  cell  states.  We  show  that  the  proposed  approach  captures  robust  and  biologically  meaningful  cell  states  and  enables  the  inference  of  epigenetic  regulation  of  phenotypic  heterogeneity.  In  the  second  part  of  this  thesis,  we  develop  methods  for  linking  genotypic  and  phenotypic  information,  first  by  using  aggregated  single-cell  RNA  sequencing  and  a  hidden  Markov  model  to  infer  copy  number  variation.  We  demonstrate  that  aggregation  improves  copy  number  inference  over  existing  approaches.  We  then  integrate  DNA  sequencing  with  single-cell  RNA  sequencing  to  infer  copy  number  profiles  in  a  rapid  autopsy  of  a  patient  with  metastatic  pancreatic  cancer.  We  develop  a  scalable  algorithm  for  inferring  phylogenetic  relationships  between  cells  from  noisy  copy  number  profiles.  We  show  that  our  approach  more  accurately  recovers  phylogenetic  relationships  between  cells  and  apply  it  to  understand  the  relationship  between  genotype  and  phenotype  in  metastatic  cancer.  Finally,  we  develop  a  metric  for  quantifying  the  extent  to  which  genotype  determines  phenotype  in  lineage  tracing  data.  We  show  that  it  more  accurately  quantifies  phenotypic  plasticity  compared  to  existing  approaches.  Altogether,  these  methods  can  be  used  to  help  uncover  the  mechanisms  underlying  phenotypic  heterogeneity  in  biological  systems.
■590    ▼aSchool  code:  0054.
■650  4▼aComputer  science
■650  4▼aBiostatistics
■650  4▼aBiology
■650  4▼aBioinformatics
■650  4▼aGenetics
■653    ▼aInferring  mechanisms
■653    ▼aBiological  heterogeneity
■653    ▼aSingle-cell  data
■653    ▼aSingle-cell  RNA  sequencing
■653    ▼aCancer
■690    ▼a0984
■690    ▼a0308
■690    ▼a0306
■690    ▼a0369
■690    ▼a0715
■71020▼aColumbia  University▼bComputer  Science.
■7730  ▼tDissertations  Abstracts  International▼g86-03B.
■790    ▼a0054
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163981▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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