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The Role of miRNA in Activity-Dependent Synaptic Plasticity- [electronic resource]
The Role of miRNA in Activity-Dependent Synaptic Plasticity - [electronic resource]
The Role of miRNA in Activity-Dependent Synaptic Plasticity- [electronic resource]

상세정보

자료유형  
 학위논문파일 국외
최종처리일시  
20240214100445
ISBN  
9798379612986
DDC  
616
저자명  
Woods, Brandon J.
서명/저자  
The Role of miRNA in Activity-Dependent Synaptic Plasticity - [electronic resource]
발행사항  
[S.l.]: : Harvard University., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(83 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 84-12, Section: B.
주기사항  
Advisor: Van Vactor, David.
학위논문주기  
Thesis (Ph.D.)--Harvard University, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약During processes like learning and memory, neural activity dynamically remodels synaptic connectivity which is critical for adaptive behavior and memory storage. At the molecular level, regulatory control of transcription and translation are indispensable for this process. Accordingly, the neuron is equipped with a robust arsenal of regulatory sensors that tightly couple changes in neural activity with transcription and protein synthesis. Within this regulatory framework, individual mRNA translation can be terminally repressed or temporarily stalled by the action of microRNAs (miRNAs). miRNAs are deployed downstream of neural activity to mediate rapid modulation of protein synthesis locally within synaptic compartments. Such regulation is distinct from classic modes of transcriptional control that regulate gene expression on relatively broad spatial and temporal scales. In contrast, the regulatory action of miRNAs can be acutely triggered to regulate mRNA translation for rapid activity-dependent modulation of local synaptic structure. Here, we have used the Drosophila neuromuscular junction to broadly survey the regulatory contributions of human conserved miRNAs during structural plasticity of the synaptic terminal. Importantly, I have discovered miRNA-973 (miR-973) as a novel regulator of synaptic structure downstream of neural activity. Accordingly, loss of miR-973 function leads to an activity-dependent degeneration of synaptic boutons. In this context, bouton decay is marked by the unique accumulation of peri-synaptic membranous debris, which is consistent with degenerative phenotypes. Mechanistically, I have shown miR-973 regulates Down Syndrome Cell Adhesion Molecule 2 (DSCAM2), a known regulator of synaptic endocytosis and vesicular dynamics. Importantly, the synaptic degeneration phenotypes associated with miR-973 loss of function can be rescued by DSCAM2 inhibition, which underscores an important role for the miR-973-DSCAM2 regulatory interaction during plasticity of synaptic structure in an activity-dependent context.
일반주제명  
Neurosciences.
일반주제명  
Molecular biology.
일반주제명  
Genetics.
키워드  
MicroRNA
키워드  
Neural activity
키워드  
Neural plasticity
키워드  
Neurobiology
키워드  
Neuroscience
키워드  
Synapse
기타저자  
Harvard University Medical Sciences
기본자료저록  
Dissertations Abstracts International. 84-12B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
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MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a616
■1001  ▼aWoods,  Brandon  J.▼0(orcid)0000-0003-2324-8925
■24510▼aThe  Role  of  miRNA  in  Activity-Dependent  Synaptic  Plasticity▼h[electronic  resource]
■260    ▼a[S.l.]:▼bHarvard  University.  ▼c2023
■260  1▼aAnn  Arbor  :▼bProQuest  Dissertations  &  Theses,  ▼c2023
■300    ▼a1  online  resource(83  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  84-12,  Section:  B.
■500    ▼aAdvisor:  Van  Vactor,  David.
■5021  ▼aThesis  (Ph.D.)--Harvard  University,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aDuring  processes  like  learning  and  memory,  neural  activity  dynamically  remodels  synaptic  connectivity  which  is  critical  for  adaptive  behavior  and  memory  storage.  At  the  molecular  level,  regulatory  control  of  transcription  and  translation  are  indispensable  for  this  process.  Accordingly,  the  neuron  is  equipped  with  a  robust  arsenal  of  regulatory  sensors  that  tightly  couple  changes  in  neural  activity  with  transcription  and  protein  synthesis.  Within  this  regulatory  framework,  individual  mRNA  translation  can  be  terminally  repressed  or  temporarily  stalled  by  the  action  of  microRNAs  (miRNAs).  miRNAs  are  deployed  downstream  of  neural  activity  to  mediate  rapid  modulation  of  protein  synthesis  locally  within  synaptic  compartments.  Such  regulation  is  distinct  from  classic  modes  of  transcriptional  control  that  regulate  gene  expression  on  relatively  broad  spatial  and  temporal  scales.  In  contrast,  the  regulatory  action  of  miRNAs  can  be  acutely  triggered  to  regulate  mRNA  translation  for  rapid  activity-dependent  modulation  of  local  synaptic  structure.  Here,  we  have  used  the  Drosophila  neuromuscular  junction  to  broadly  survey  the  regulatory  contributions  of  human  conserved  miRNAs  during  structural  plasticity  of  the  synaptic  terminal.  Importantly,  I  have  discovered  miRNA-973  (miR-973)  as  a  novel  regulator  of  synaptic  structure  downstream  of  neural  activity.  Accordingly,  loss  of  miR-973  function  leads  to  an  activity-dependent  degeneration  of  synaptic  boutons.  In  this  context,  bouton  decay  is  marked  by  the  unique  accumulation  of  peri-synaptic  membranous  debris,  which  is  consistent  with  degenerative  phenotypes.  Mechanistically,  I  have  shown  miR-973  regulates  Down  Syndrome  Cell  Adhesion  Molecule  2  (DSCAM2),  a  known  regulator  of  synaptic  endocytosis  and  vesicular  dynamics.  Importantly,  the  synaptic  degeneration  phenotypes  associated  with  miR-973  loss  of  function  can  be  rescued  by  DSCAM2  inhibition,  which  underscores  an  important  role  for  the  miR-973-DSCAM2  regulatory  interaction  during  plasticity  of  synaptic  structure  in  an  activity-dependent  context.
■590    ▼aSchool  code:  0084.
■650  4▼aNeurosciences.
■650  4▼aMolecular  biology.
■650  4▼aGenetics.
■653    ▼aMicroRNA
■653    ▼aNeural  activity
■653    ▼aNeural  plasticity
■653    ▼aNeurobiology
■653    ▼aNeuroscience
■653    ▼aSynapse
■690    ▼a0317
■690    ▼a0307
■690    ▼a0369
■71020▼aHarvard  University▼bMedical  Sciences.
■7730  ▼tDissertations  Abstracts  International▼g84-12B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0084
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16932342▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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