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How Does Oligodendrocyte Calcium Signaling Regulate Central Nervous System Myelination?
How Does Oligodendrocyte Calcium Signaling Regulate Central Nervous System Myelination?
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105621
- ISBN
- 9798265428530
- DDC
- 610
- 저자명
- Iyer, Manasi.
- 서명/저자
- How Does Oligodendrocyte Calcium Signaling Regulate Central Nervous System Myelination?
- 발행사항
- [Sl] : Stanford University, 2023
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2023
- 형태사항
- 92 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: A.
- 주기사항
- Advisor: Zuchero, J.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2023.
- 초록/해제
- 요약In this dissertation, I examine the role of oligodendrocyte calcium signaling in regulating myelination and oligodendrocyte cell biology, both in the context of development and during learning and plasticity. Myelin is essential for rapid nerve signaling is increasingly found to play important roles in learning and in diverse diseases of the CNS. Morphological parameters of myelin such as sheath length and thickness are regulated by neuronal activity and are likely critical for fine-tuning conduction velocity, but the mechanisms controlling sheath morphology are poorly understood.Local calcium signaling has been observed in nascent myelin sheaths and can be modulated by neuronal activity. However, the role of calcium signaling in sheath formation and remodeling is unknown. In this dissertation, I have developed a suite of pharmacological and genetically-encoded tools to attenuate calcium during active myelination in the developing mouse CNS. I found that genetic calcium attenuation did not grossly abrogate myelin formation. Instead, calcium attenuation caused myelin defects: shorter myelin sheaths with abnormal morphology. Mechanistically, I found that dysregulation of myelin morphology was accompanied by reductions in actin filaments, and that an intact actin cytoskeleton was necessary and sufficient to achieve accurate myelin morphology.To follow up on this, I have begun to investigate the role of oligodendrocyte calcium signaling in regulating SNARE-mediated exocytosis. Second, I have found, excitingly, that oligodendrocyte calcium signaling is required for the acquisition of a dexterous forelimb reach task, suggesting that calcium signaling in oligodendrocytes may act as a cell biological bridge between neuronal activity and experience-dependent myelination. Together, my work reveals novel cellular mechanisms required for accurate CNS myelin formation and provides mechanistic insight into how oligodendrocytes may respond to neuronal activity to precisely sculpt myelin sheaths throughout the nervous system.
- 일반주제명
- Cytoplasm
- 일반주제명
- Convulsions & seizures
- 일반주제명
- Epilepsy
- 일반주제명
- Communication
- 일반주제명
- Brain
- 일반주제명
- Neurosciences
- 일반주제명
- Metabolism
- 일반주제명
- Potassium
- 일반주제명
- Cell cycle
- 일반주제명
- Neurons
- 일반주제명
- Sodium
- 일반주제명
- Microscopy
- 일반주제명
- Travel
- 일반주제명
- Nervous system
- 일반주제명
- Spinal cord
- 일반주제명
- Geometry
- 일반주제명
- Cellular biology
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 87-05A.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■006m o d
■007cr#unu||||||||
■020 ▼a9798265428530
■035 ▼a(MiAaPQ)AAI32316507
■035 ▼a(MiAaPQ)Stanfordxb587pb7940
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a610
■1001 ▼aIyer, Manasi.
■24510▼aHow Does Oligodendrocyte Calcium Signaling Regulate Central Nervous System Myelination?
■260 ▼a[Sl]▼bStanford University▼c2023
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2023
■300 ▼a92 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: A.
■500 ▼aAdvisor: Zuchero, J.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2023.
■520 ▼aIn this dissertation, I examine the role of oligodendrocyte calcium signaling in regulating myelination and oligodendrocyte cell biology, both in the context of development and during learning and plasticity. Myelin is essential for rapid nerve signaling is increasingly found to play important roles in learning and in diverse diseases of the CNS. Morphological parameters of myelin such as sheath length and thickness are regulated by neuronal activity and are likely critical for fine-tuning conduction velocity, but the mechanisms controlling sheath morphology are poorly understood.Local calcium signaling has been observed in nascent myelin sheaths and can be modulated by neuronal activity. However, the role of calcium signaling in sheath formation and remodeling is unknown. In this dissertation, I have developed a suite of pharmacological and genetically-encoded tools to attenuate calcium during active myelination in the developing mouse CNS. I found that genetic calcium attenuation did not grossly abrogate myelin formation. Instead, calcium attenuation caused myelin defects: shorter myelin sheaths with abnormal morphology. Mechanistically, I found that dysregulation of myelin morphology was accompanied by reductions in actin filaments, and that an intact actin cytoskeleton was necessary and sufficient to achieve accurate myelin morphology.To follow up on this, I have begun to investigate the role of oligodendrocyte calcium signaling in regulating SNARE-mediated exocytosis. Second, I have found, excitingly, that oligodendrocyte calcium signaling is required for the acquisition of a dexterous forelimb reach task, suggesting that calcium signaling in oligodendrocytes may act as a cell biological bridge between neuronal activity and experience-dependent myelination. Together, my work reveals novel cellular mechanisms required for accurate CNS myelin formation and provides mechanistic insight into how oligodendrocytes may respond to neuronal activity to precisely sculpt myelin sheaths throughout the nervous system.
■590 ▼aSchool code: 0212.
■650 4▼aCytoplasm
■650 4▼aConvulsions & seizures
■650 4▼aEpilepsy
■650 4▼aCommunication
■650 4▼aBrain
■650 4▼aNeurosciences
■650 4▼aMetabolism
■650 4▼aPotassium
■650 4▼aCell cycle
■650 4▼aNeurons
■650 4▼aSodium
■650 4▼aMicroscopy
■650 4▼aTravel
■650 4▼aNervous system
■650 4▼aSpinal cord
■650 4▼aGeometry
■650 4▼aCellular biology
■690 ▼a0459
■690 ▼a0317
■690 ▼a0379
■690 ▼a0801
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g87-05A.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2023
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360799▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


