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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 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
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017160446
■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.


