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Unbiased Multidimensional Analysis Reveals Novel Principles of Cortical Interneuron Synaptic Organization
Unbiased Multidimensional Analysis Reveals Novel Principles of Cortical Interneuron Synapt...
Unbiased Multidimensional Analysis Reveals Novel Principles of Cortical Interneuron Synaptic Organization

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211152643
ISBN  
9798383570593
DDC  
616
저자명  
Dummer, Patrick Daniel.
서명/저자  
Unbiased Multidimensional Analysis Reveals Novel Principles of Cortical Interneuron Synaptic Organization
발행사항  
[Sl] : Columbia University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
386 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-01, Section: B.
주기사항  
Advisor: Au, Edmund.
학위논문주기  
Thesis (Ph.D.)--Columbia University, 2024.
초록/해제  
요약Neurons display exquisite specificity in synaptic connectivity, but we lack a complete understanding of neuronal connectivity and the rules that govern it. A major impediment to addressing this question lies in the vast diversity of neurons, the small size and large number of synapses formed by any given neuron over a wide territory, and the need to study these connections in intact tissue. We therefore developed an image-based tool to assess synaptic specificity in tissue sections and dissociated culture. We focused on three interneuron subpopulations that target distinct sub-cellular regions of the post-synaptic cell: soma-targeting basket cells (BCs), axon initial segment (AlS)-targeting chandelier cells (ChCs), and distal dendrite-targeting somatostatin cells (SstCs). Using mouse dissociated cortical culture as a starting point, we built a machine learning (ML) based image processing and analysis pipeline to classify individual presynaptic boutons at scale. Supervised ML classification revealed similar subcellular targeting profiles for these interneuron populations in slice and culture, indicating that targeting is primarily regulated by cell intrinsic programs. We also observed a remarkable target-dependent laminar organization in vivo. An unsupervised ML analysis using the same input data not only identified the same three canonical targeting classes, but also revealed that these classes are comprised of multiple subpopulations. In slice, these synaptic subpopulations displayed distinct laminar organization. In dissociated culture, two soma-targeting synaptic subpopulations mapped to target cells with different cellular profiles. The six dendrite-targeting synaptic subpopulations were found at increasing distances from target soma, suggesting molecularly distinct proximal, medial, and distal dendritic compartments in culture. Tracking subtype targeting across axonal branches of individual neurons indicated that SstCs and BCs utilize distinct targeting strategies in culture that accord with established findings in vivo. In sum, our synaptic analysis pipeline revealed novel synaptic subpopulations in interneurons. Further analysis uncovered novel aspects of interneuron synaptic biology that, remarkably, are retained in culture.
일반주제명  
Neurosciences
일반주제명  
Cellular biology
일반주제명  
Developmental biology
일반주제명  
Systematic biology
키워드  
Cortical interneurons
키워드  
GABAergic
키워드  
Synaptic specificity
키워드  
Somatostatin cells
키워드  
Machine learning
기타저자  
Columbia University Pathobiology and Molecular Medicine
기본자료저록  
Dissertations Abstracts International. 86-01B.
전자적 위치 및 접속  
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MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a616
■1001  ▼aDummer,  Patrick  Daniel.
■24510▼aUnbiased  Multidimensional  Analysis  Reveals  Novel  Principles  of  Cortical  Interneuron  Synaptic  Organization
■260    ▼a[Sl]▼bColumbia  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a386  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-01,  Section:  B.
■500    ▼aAdvisor:  Au,  Edmund.
■5021  ▼aThesis  (Ph.D.)--Columbia  University,  2024.
■520    ▼aNeurons  display  exquisite  specificity  in  synaptic  connectivity,  but  we  lack  a  complete  understanding  of  neuronal  connectivity  and  the  rules  that  govern  it.  A  major  impediment  to  addressing  this  question  lies  in  the  vast  diversity  of  neurons,  the  small  size  and  large  number  of  synapses  formed  by  any  given  neuron  over  a  wide  territory,  and  the  need  to  study  these  connections  in  intact  tissue.  We  therefore  developed  an  image-based  tool  to  assess  synaptic  specificity  in  tissue  sections  and  dissociated  culture.  We  focused  on  three  interneuron  subpopulations  that  target  distinct  sub-cellular  regions  of  the  post-synaptic  cell:  soma-targeting  basket  cells  (BCs),  axon  initial  segment  (AlS)-targeting  chandelier  cells  (ChCs),  and  distal  dendrite-targeting  somatostatin  cells  (SstCs).  Using  mouse  dissociated  cortical  culture  as  a  starting  point,  we  built  a  machine  learning  (ML)  based  image  processing  and  analysis  pipeline  to  classify  individual  presynaptic  boutons  at  scale.  Supervised  ML  classification  revealed  similar  subcellular  targeting  profiles  for  these  interneuron  populations  in  slice  and  culture,  indicating  that  targeting  is  primarily  regulated  by  cell  intrinsic programs.  We  also  observed  a  remarkable  target-dependent  laminar  organization  in  vivo.  An  unsupervised  ML  analysis  using  the  same  input  data  not  only  identified  the  same  three  canonical  targeting  classes,  but  also  revealed  that  these  classes  are  comprised  of  multiple  subpopulations.  In  slice,  these  synaptic  subpopulations  displayed  distinct  laminar  organization.  In  dissociated  culture,  two  soma-targeting  synaptic  subpopulations  mapped  to  target  cells  with  different  cellular  profiles.  The  six  dendrite-targeting  synaptic  subpopulations  were  found  at  increasing  distances  from  target  soma,  suggesting  molecularly  distinct  proximal,  medial,  and  distal  dendritic  compartments  in  culture.  Tracking  subtype  targeting  across  axonal  branches  of  individual  neurons  indicated  that  SstCs  and  BCs  utilize  distinct  targeting  strategies  in  culture  that  accord  with  established  findings  in  vivo.  In  sum,  our  synaptic  analysis  pipeline  revealed  novel  synaptic  subpopulations  in  interneurons.  Further  analysis  uncovered  novel  aspects  of  interneuron  synaptic  biology  that,  remarkably,  are  retained  in  culture.
■590    ▼aSchool  code:  0054.
■650  4▼aNeurosciences
■650  4▼aCellular  biology
■650  4▼aDevelopmental  biology
■650  4▼aSystematic  biology
■653    ▼aCortical  interneurons
■653    ▼aGABAergic
■653    ▼aSynaptic  specificity
■653    ▼aSomatostatin  cells  
■653    ▼aMachine  learning
■690    ▼a0317
■690    ▼a0379
■690    ▼a0758
■690    ▼a0423
■690    ▼a0800
■71020▼aColumbia  University▼bPathobiology  and  Molecular  Medicine.
■7730  ▼tDissertations  Abstracts  International▼g86-01B.
■790    ▼a0054
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163242▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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