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Maintaining Bilateral Symmetry and Terminal Development in Early Drosophila Embryogenesis- [electronic resource]
Maintaining Bilateral Symmetry and Terminal Development in Early Drosophila Embryogenesis ...
Maintaining Bilateral Symmetry and Terminal Development in Early Drosophila Embryogenesis- [electronic resource]

상세정보

자료유형  
 학위논문파일 국외
최종처리일시  
20240214100443
ISBN  
9798379718701
DDC  
574
저자명  
Smits, Celia M.
서명/저자  
Maintaining Bilateral Symmetry and Terminal Development in Early Drosophila Embryogenesis - [electronic resource]
발행사항  
[S.l.]: : Princeton University., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(103 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 84-12, Section: B.
주기사항  
Includes supplementary digital materials.
주기사항  
Advisor: Shvartsman, Stanislav Y.
학위논문주기  
Thesis (Ph.D.)--Princeton University, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약Bilateral symmetry defines much of the animal kingdom and is crucial for numerous functions of bilaterian organisms. Genetic approaches have discovered highly conserved patterning networks that establish bilateral symmetry in early embryos (Genikhovich & Technau, 2017), but how this symmetry is maintained throughout subsequent morphogenetic events remains largely unknown (Grimes, 2019). Here I show that the terminal patterning system - which relies on Ras/ERK signaling through activation of the Torso receptor by its ligand Trunk (Smits & Shvartsman, 2020) - is critical for preserving bilateral symmetry during Drosophila body axis elongation, a process driven by cell rearrangements in the two identical lateral regions of the embryo and specified by the dorsal-ventral and anterior-posterior patterning systems (Kong et al., 2017). I demonstrate that fluctuating asymmetries in this rapid convergent-extension process are attenuated in normal embryos over time, possibly through noise-dissipating forces from the posterior midgut invagination and movement. However, when Torso signaling is attenuated via mutation of Trunk or RNAi directed against downstream Ras/ERK pathway components, body axis elongation results in a characteristic corkscrew phenotype (Perkins et al., 1992), which reflects dramatic reorganization of global tissue flow and is incompatible with viability. These results reveal a new function downstream of the Drosophila terminal patterning system in potentially active control of bilateral symmetry and should motivate systematic search for similar symmetry-preserving regulatory mechanisms in other bilaterians. Additionally, I present a framework for imaging the lineages of pole cell, the primordial germ cells of the embryo, and I show preliminary data on these lineage traces that depicts pole cell division patterns.
일반주제명  
Developmental biology.
일반주제명  
Cellular biology.
일반주제명  
Molecular biology.
일반주제명  
Genetics.
키워드  
Bilateral symmetry
키워드  
Conserved patterning networks
키워드  
Morphogenetic events
키워드  
Drosophila
키워드  
Embryo
키워드  
Cell division patterns
키워드  
Ras/ERK signaling
기타저자  
Princeton University Molecular Biology
기본자료저록  
Dissertations Abstracts International. 84-12B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■020    ▼a9798379718701
■035    ▼a(MiAaPQ)AAI30491528
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a574
■1001  ▼aSmits,  Celia  M.
■24510▼aMaintaining  Bilateral  Symmetry  and  Terminal  Development  in  Early  Drosophila  Embryogenesis▼h[electronic  resource]
■260    ▼a[S.l.]:▼bPrinceton  University.  ▼c2023
■260  1▼aAnn  Arbor  :▼bProQuest  Dissertations  &  Theses,  ▼c2023
■300    ▼a1  online  resource(103  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  84-12,  Section:  B.
■500    ▼aIncludes  supplementary  digital  materials.
■500    ▼aAdvisor:  Shvartsman,  Stanislav  Y.
■5021  ▼aThesis  (Ph.D.)--Princeton  University,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aBilateral  symmetry  defines  much  of  the  animal  kingdom  and  is  crucial  for  numerous  functions  of  bilaterian  organisms.  Genetic  approaches  have  discovered  highly  conserved  patterning  networks  that  establish  bilateral  symmetry  in  early  embryos  (Genikhovich  &  Technau,  2017),  but  how  this  symmetry  is  maintained  throughout  subsequent  morphogenetic  events  remains  largely  unknown  (Grimes,  2019).  Here  I  show  that  the  terminal  patterning  system  -  which  relies  on  Ras/ERK  signaling  through  activation  of  the  Torso  receptor  by  its  ligand  Trunk  (Smits  &  Shvartsman,  2020)  -  is  critical  for  preserving  bilateral  symmetry  during  Drosophila  body  axis  elongation,  a  process  driven  by  cell  rearrangements  in  the  two  identical  lateral  regions  of  the  embryo  and  specified  by  the  dorsal-ventral  and  anterior-posterior  patterning  systems  (Kong  et  al.,  2017).  I  demonstrate  that  fluctuating  asymmetries  in  this  rapid  convergent-extension  process  are  attenuated  in  normal  embryos  over  time,  possibly  through  noise-dissipating  forces  from  the  posterior  midgut  invagination  and  movement.  However,  when  Torso  signaling  is  attenuated  via  mutation  of  Trunk  or  RNAi  directed  against  downstream  Ras/ERK  pathway  components,  body  axis  elongation  results  in  a  characteristic  corkscrew  phenotype  (Perkins  et  al.,  1992),  which  reflects  dramatic  reorganization  of  global  tissue  flow  and  is  incompatible  with  viability.  These  results  reveal  a  new  function  downstream  of  the  Drosophila  terminal  patterning  system  in  potentially  active  control  of  bilateral  symmetry  and  should  motivate  systematic  search  for  similar  symmetry-preserving  regulatory  mechanisms  in  other  bilaterians.  Additionally,  I  present  a  framework  for  imaging  the  lineages  of  pole  cell,  the  primordial  germ  cells  of  the  embryo,  and  I  show  preliminary  data  on  these  lineage  traces  that  depicts  pole  cell  division  patterns.
■590    ▼aSchool  code:  0181.
■650  4▼aDevelopmental  biology.
■650  4▼aCellular  biology.
■650  4▼aMolecular  biology.
■650  4▼aGenetics.
■653    ▼aBilateral  symmetry
■653    ▼aConserved  patterning  networks
■653    ▼aMorphogenetic  events
■653    ▼aDrosophila
■653    ▼aEmbryo
■653    ▼aCell  division  patterns
■653    ▼aRas/ERK  signaling
■690    ▼a0758
■690    ▼a0379
■690    ▼a0369
■690    ▼a0307
■71020▼aPrinceton  University▼bMolecular  Biology.
■7730  ▼tDissertations  Abstracts  International▼g84-12B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0181
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16932326▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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