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Characterization of a Neuroendocrine Network That Coordinates Sugar and Water Ingestion in Drosophila melanogaster- [electronic resource]
Characterization of a Neuroendocrine Network That Coordinates Sugar and Water Ingestion in...
Characterization of a Neuroendocrine Network That Coordinates Sugar and Water Ingestion in Drosophila melanogaster- [electronic resource]

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자료유형  
 학위논문파일 국외
최종처리일시  
20240214100501
ISBN  
9798380382458
DDC  
616
저자명  
Gonzalez-Segarra, Amanda J.
서명/저자  
Characterization of a Neuroendocrine Network That Coordinates Sugar and Water Ingestion in Drosophila melanogaster - [electronic resource]
발행사항  
[S.l.]: : University of California, Berkeley., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(146 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
주기사항  
Advisor: Scott, Kristin.
학위논문주기  
Thesis (Ph.D.)--University of California, Berkeley, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약Consumption of food and water is tightly regulated by the nervous system to maintain internal nutrient homeostasis. Although generally considered independently, interactions between hunger and thirst drives are important to coordinate competing needs. In chapter 1, I provide a review of hunger regulation and thirst regulation in mammals and Drosophila melanogaster. I then discuss the neural and hormonal coordination of hunger and thirst in both mammals and D. melanogaster.In Drosophila, four neurons called the Interoceptive Subesophageal zone Neurons (ISNs) respond to intrinsic hunger and thirst signals to oppositely regulate sucrose and water ingestion. In chapter 2, I characterize the neural circuit downstream of the ISNs. This work is presented in the form of a preprint first author manuscript. Using the fly brain connectome, genetic tools, behavioral assays, and functional imaging, I show, together with co-authors Gina Pontes, Nicholas Jourjine and Alexander Del Toro, that the ISNs modulate a peptidergic network of neurons. These include a novel cell type Bilateral T shaped neuron (BiT), insulin producing cells (IPC), crustacean cardioactive peptide (CCAP) neurons, and CCHamide-2 receptor isoform RA (CCHa2R-RA) neurons. These neurons contribute differentially to ingestion of sugar and water, with BiT, IPCs and CCAP neurons oppositely regulating sugar and water ingestion, and CCHa2R-RA neurons modulating only water ingestion. Thus, the decision to consume sugar or water occurs via regulation of a broad peptidergic network that integrates internal signals of nutritional state to generate nutrient-specific ingestion.In chapter 3, I characterize other neurons that are involved in sugar and/or water ingestion. Using a computational approach to identify neurons in close proximity, genetic manipulation, behavioral assays, and in vivo functional imaging, I characterized several neurons involved in sugar and/or water ingestion regulation. Aster, bidirectionally regulates sugar and water ingestion just as the ISNs, Horseshoe, decreases both sugar and water ingestion, and Cowboy likely promotes sugar ingestion. In vivo functional connectivity experiments revealed that they were not downstream of the ISNs, however, Aster, possibly Horseshoe, and another cell type Gallinule are downstream of sensory neurons. Thus, I have identified another cell type that bidirectionally regulates sugar and water ingestion, two cell types that modulate feeding, and a cell type that likely conveys gustatory information to memory centers in the fly brain.In chapter 4, I describe with co-authors Zoila Alvarez-Aponte, Rachel Brem, Diana Bautista and Denzil Streete, the development and implementation of the Inclusive Excellence in Quals Prep (IEQP) program. This program was designed to provide mentorship, community, and academic support for students from diverse backgrounds as they prepared for their QE. The main components for IEQP program included pairing students with graduate student mentors, academic and wellness workshops, and community building events. This program was first implemented on a pilot cohort of 11 graduate students. After program evaluation, the most significant component of the program was peer mentorship. After program completion, students' perception of their preparedness, QE-related skills, the support received from their advisors, and the agency they felt over their proposed work increased.In the final part of this dissertation, chapter 5, I summarize the main findings of this dissertation and propose future directions for exploration.
일반주제명  
Neurosciences.
일반주제명  
Cellular biology.
일반주제명  
Molecular biology.
키워드  
Feeding
키워드  
Homeostasis
키워드  
Hunger
키워드  
Thirst regulation
기타저자  
University of California, Berkeley Molecular & Cell Biology
기본자료저록  
Dissertations Abstracts International. 85-03B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
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MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a616
■1001  ▼aGonzalez-Segarra,  Amanda  J.
■24510▼aCharacterization  of  a  Neuroendocrine  Network  That  Coordinates  Sugar  and  Water  Ingestion  in  Drosophila  melanogaster▼h[electronic  resource]
■260    ▼a[S.l.]:▼bUniversity  of  California,  Berkeley.  ▼c2023
■260  1▼aAnn  Arbor  :▼bProQuest  Dissertations  &  Theses,  ▼c2023
■300    ▼a1  online  resource(146  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-03,  Section:  B.
■500    ▼aAdvisor:  Scott,  Kristin.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Berkeley,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aConsumption  of  food  and  water  is  tightly  regulated  by  the  nervous  system  to  maintain  internal  nutrient  homeostasis.  Although  generally  considered  independently,  interactions  between  hunger  and  thirst  drives  are  important  to  coordinate  competing  needs.  In  chapter  1,  I  provide  a  review  of  hunger  regulation  and  thirst  regulation  in  mammals  and  Drosophila  melanogaster.  I  then  discuss  the  neural  and  hormonal  coordination  of  hunger  and  thirst  in  both  mammals  and  D.  melanogaster.In  Drosophila,  four  neurons  called  the  Interoceptive  Subesophageal  zone  Neurons  (ISNs)  respond  to  intrinsic  hunger  and  thirst  signals  to  oppositely  regulate  sucrose  and  water  ingestion.  In  chapter  2,  I  characterize  the  neural  circuit  downstream  of  the  ISNs.  This  work  is  presented  in  the  form  of  a  preprint  first  author  manuscript.  Using  the  fly  brain  connectome,  genetic  tools,  behavioral  assays,  and  functional  imaging,  I  show,  together  with  co-authors  Gina  Pontes,  Nicholas  Jourjine  and  Alexander  Del  Toro,  that  the  ISNs  modulate  a  peptidergic  network  of  neurons.  These  include  a  novel  cell  type  Bilateral  T  shaped  neuron  (BiT),  insulin  producing  cells  (IPC),  crustacean  cardioactive  peptide  (CCAP)  neurons,  and  CCHamide-2  receptor  isoform  RA  (CCHa2R-RA)  neurons.  These  neurons  contribute  differentially  to  ingestion  of  sugar  and  water,  with  BiT,  IPCs  and  CCAP  neurons  oppositely  regulating  sugar  and  water  ingestion,  and  CCHa2R-RA  neurons  modulating  only  water  ingestion.  Thus,  the  decision  to  consume  sugar  or  water  occurs  via  regulation  of  a  broad  peptidergic  network  that  integrates  internal  signals  of  nutritional  state  to  generate  nutrient-specific  ingestion.In  chapter  3,  I  characterize  other  neurons  that  are  involved  in  sugar  and/or  water  ingestion.  Using  a  computational  approach  to  identify  neurons  in  close  proximity,  genetic  manipulation,  behavioral  assays,  and in  vivo  functional  imaging,  I  characterized  several  neurons  involved  in  sugar  and/or  water  ingestion  regulation.  Aster,  bidirectionally  regulates  sugar  and  water  ingestion  just  as  the  ISNs,  Horseshoe,  decreases  both  sugar  and  water  ingestion,  and  Cowboy  likely  promotes  sugar  ingestion.  In  vivo  functional  connectivity  experiments  revealed  that  they  were  not  downstream  of  the  ISNs,  however,  Aster,  possibly  Horseshoe,  and  another  cell  type  Gallinule  are  downstream  of  sensory  neurons.  Thus,  I  have  identified  another  cell  type  that  bidirectionally  regulates  sugar  and  water  ingestion,  two  cell  types  that  modulate  feeding,  and  a  cell  type  that  likely  conveys  gustatory  information  to  memory  centers  in  the  fly  brain.In  chapter  4,  I  describe  with  co-authors  Zoila  Alvarez-Aponte,  Rachel  Brem,  Diana  Bautista  and  Denzil  Streete,  the  development  and  implementation  of  the  Inclusive  Excellence  in  Quals  Prep  (IEQP)  program.  This  program  was  designed  to  provide  mentorship,  community,  and  academic  support  for  students  from  diverse  backgrounds  as  they  prepared  for  their  QE.  The  main  components  for  IEQP  program  included  pairing  students  with  graduate  student  mentors,  academic  and  wellness  workshops,  and  community  building  events.  This  program  was  first  implemented  on  a  pilot  cohort  of  11  graduate  students.  After  program  evaluation,  the  most  significant  component  of  the  program  was  peer  mentorship.  After  program  completion,  students'  perception  of  their  preparedness,  QE-related  skills,  the  support  received  from  their  advisors,  and  the  agency  they  felt  over  their  proposed  work  increased.In  the  final  part  of  this  dissertation,  chapter  5,  I  summarize  the  main  findings  of  this  dissertation  and  propose  future  directions  for  exploration.
■590    ▼aSchool  code:  0028.
■650  4▼aNeurosciences.
■650  4▼aCellular  biology.
■650  4▼aMolecular  biology.
■653    ▼aFeeding
■653    ▼aHomeostasis
■653    ▼aHunger
■653    ▼aThirst  regulation
■690    ▼a0317
■690    ▼a0379
■690    ▼a0307
■71020▼aUniversity  of  California,  Berkeley▼bMolecular  &  Cell  Biology.
■7730  ▼tDissertations  Abstracts  International▼g85-03B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0028
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16932460▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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