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The Duality of Neurons: Co-Transmission of Serotonin and a Neuropeptide, NLP-3, in the Caenorhabditis elegans Egg-Laying Circuit
The Duality of Neurons: Co-Transmission of Serotonin and a Neuropeptide, NLP-3, in the Cae...
The Duality of Neurons: Co-Transmission of Serotonin and a Neuropeptide, NLP-3, in the Caenorhabditis elegans Egg-Laying Circuit

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211151021
ISBN  
9798383421390
DDC  
616
저자명  
Butt, Allison M.
서명/저자  
The Duality of Neurons: Co-Transmission of Serotonin and a Neuropeptide, NLP-3, in the Caenorhabditis elegans Egg-Laying Circuit
발행사항  
[Sl] : Yale University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
124 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
주기사항  
Advisor: Koelle, Michael.
학위논문주기  
Thesis (Ph.D.)--Yale University, 2024.
초록/해제  
요약Neurons typically release both a neurotransmitter and one or more neuropeptides in a process known as co-transmission. While this process is a widely observed phenomenon, the logic of why a neuron releases these two or more different types of signals to accomplish its myriad of functions remains largely unclear. In this dissertation, I studied how two serotonergic neurons in the C. elegans egg-laying circuit-known as the Hermaphrodite Specific Neurons (HSNs)-release both the neurotransmitter serotonin and the neuropeptide NLP-3 to activate egg laying. Egg laying typically occurs in a temporal pattern with two-minute active phases, during which the HSNs are highly active and eggs are laid approximately 18 seconds apart. These periods of intense egg laying are separated by approximately 22-minute inactive phases, during which the HSNs have less frequent calcium transients and no eggs are laid. I utilized a targeted RNAi screen to identify the G protein coupled receptor NPR-36 as an NLP-3 receptor, and used additional genetic and molecular experiments to support this cognate pairing. NPR-36 is expressed on and promotes egg laying by activating the egg-laying muscle cells, the same cells where two serotonin receptors also promote egg laying. Although NLP-3 is likely released only when HSNs are highly active (i.e. during the active phase), NLP-3 appears to persist through the subsequent inactive phase to switch on the next active phase along with serotonin. I conclude from this work that NLP-3 and serotonin together overcome the long-lasting inhibitory signals that maintain the egg-laying inactive phase while also regulating discrete aspects of egg-laying activity in the active phase. My work suggests a model in which multiple signals with short and long-lasting effects compete to pattern a behavior over tens of minutes.
일반주제명  
Neurosciences
일반주제명  
Molecular biology
일반주제명  
Genetics
키워드  
C. elegans
키워드  
Co-transmission
키워드  
Neural circuit
키워드  
Neuropeptide
키워드  
Serotonin
기타저자  
Yale University Molecular Biophysics and Biochemistry
기본자료저록  
Dissertations Abstracts International. 86-02B.
전자적 위치 및 접속  
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MARC

 008250123s2024        us                              c    eng  d
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■00520250211151021
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798383421390
■035    ▼a(MiAaPQ)AAI30996497
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a616
■1001  ▼aButt,  Allison  M.
■24510▼aThe  Duality  of  Neurons:  Co-Transmission  of  Serotonin  and  a  Neuropeptide,  NLP-3,  in  the  Caenorhabditis  elegans  Egg-Laying  Circuit
■260    ▼a[Sl]▼bYale  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a124  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-02,  Section:  B.
■500    ▼aAdvisor:  Koelle,  Michael.
■5021  ▼aThesis  (Ph.D.)--Yale  University,  2024.
■520    ▼aNeurons  typically  release  both  a  neurotransmitter  and  one  or  more  neuropeptides  in  a  process  known  as  co-transmission.  While  this  process  is  a  widely  observed  phenomenon,  the  logic  of  why  a  neuron  releases  these  two  or  more  different  types  of  signals  to  accomplish  its  myriad  of  functions  remains  largely  unclear.  In  this  dissertation,  I  studied  how  two  serotonergic  neurons  in  the  C.  elegans  egg-laying  circuit-known  as  the  Hermaphrodite  Specific  Neurons  (HSNs)-release  both  the  neurotransmitter  serotonin  and  the  neuropeptide  NLP-3  to  activate  egg  laying.  Egg  laying  typically  occurs  in  a  temporal  pattern  with  two-minute  active  phases,  during  which  the  HSNs  are  highly  active  and  eggs  are  laid  approximately  18  seconds  apart.  These  periods  of  intense  egg  laying  are  separated  by  approximately  22-minute  inactive  phases,  during  which  the  HSNs  have  less  frequent  calcium  transients  and  no  eggs  are  laid.  I  utilized  a  targeted  RNAi  screen  to  identify  the  G  protein  coupled  receptor  NPR-36  as  an  NLP-3  receptor,  and  used  additional  genetic  and  molecular  experiments  to  support  this  cognate  pairing.  NPR-36  is  expressed  on  and  promotes  egg  laying  by  activating  the  egg-laying  muscle  cells,  the  same  cells  where  two  serotonin  receptors  also  promote  egg  laying.  Although  NLP-3  is  likely  released  only  when  HSNs  are  highly  active  (i.e.  during  the  active  phase),  NLP-3  appears  to  persist  through  the  subsequent  inactive  phase  to  switch  on  the  next  active  phase  along  with  serotonin.  I  conclude  from  this  work  that  NLP-3  and  serotonin  together  overcome  the  long-lasting  inhibitory  signals  that  maintain  the  egg-laying  inactive  phase  while  also  regulating  discrete  aspects  of  egg-laying  activity  in  the  active  phase.  My  work  suggests  a  model  in  which  multiple  signals  with  short  and  long-lasting  effects  compete  to  pattern  a  behavior  over  tens  of  minutes.
■590    ▼aSchool  code:  0265.
■650  4▼aNeurosciences
■650  4▼aMolecular  biology
■650  4▼aGenetics
■653    ▼aC.  elegans
■653    ▼aCo-transmission
■653    ▼aNeural  circuit
■653    ▼aNeuropeptide
■653    ▼aSerotonin
■690    ▼a0317
■690    ▼a0307
■690    ▼a0369
■71020▼aYale  University▼bMolecular  Biophysics  and  Biochemistry.
■7730  ▼tDissertations  Abstracts  International▼g86-02B.
■790    ▼a0265
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160446▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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