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Unbiased Multidimensional Analysis Reveals Novel Principles of Cortical Interneuron Synaptic Organization
Unbiased Multidimensional Analysis Reveals Novel Principles of Cortical Interneuron Synaptic Organization
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152643
- ISBN
- 9798383570593
- DDC
- 616
- 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
- GABAergic
- 키워드
- Machine learning
- 기타저자
- Columbia University Pathobiology and Molecular Medicine
- 기본자료저록
- Dissertations Abstracts International. 86-01B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152643
■006m o d
■007cr#unu||||||||
■020 ▼a9798383570593
■035 ▼a(MiAaPQ)AAI31485441
■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.


