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Fat and Dachsous Regulate Growth Rate and Relative Size in Drosophila Wings
Fat and Dachsous Regulate Growth Rate and Relative Size in Drosophila Wings
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211150957
- ISBN
- 9798381975109
- DDC
- 574
- 저자명
- Liu, Andrew.
- 서명/저자
- Fat and Dachsous Regulate Growth Rate and Relative Size in Drosophila Wings
- 발행사항
- [Sl] : Northwestern University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 226 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-10, Section: B.
- 주기사항
- Advisor: Carthew, Richard.
- 학위논문주기
- Thesis (Ph.D.)--Northwestern University, 2024.
- 초록/해제
- 요약Growth control is a fundamental aspect of developmental biology. Organs have proper growth rates proportional to the body and standard final sizes to ensure form and function. In this thesis, I investigate the mechanism of growth control at the end of the larval stages in the Drosophila wing imaginal disc. The atypical cadherins Fat and Dachsous (Ds) are known tumor suppressors that signal through the Hippo pathway. Previous studies had characterized the overgrowth phenotype in fat and ds mutants and hypothesized that the graded Ds expression may control growth via the positional information model. This model suggests that cells can measure the local gradient of Ds, divide if the gradient is high, and stop growth if the gradient is below a certain threshold.Here, I quantitatively measured the growth rate of the wing disc, separating the wing pouch and notum, relative to the body in the third larval instar. I showed that the overgrowth in fat and ds mutants can be attributed to both increased growth rate and delayed growth cessation. The duration of the cell cycle increased linearly with wing size. I showed that Fat-Ds signaling enhances the rate at which the cell cycle lengthens with wing size, thus diminishing the linear rate of wing growth. Finally, I examined the dynamics of Fat and Ds protein distribution in the wing, observing graded distributions that change during growth. Unexpectedly, I found a graded Fat expression pattern that gradually shallows and completely flattens as growth ends. Contrarily, the graded Ds expression pattern was size invariant. Therefore, I hypothesize that Fat is the actual candidate for the positional information model in growth control of the wing pouch.
- 일반주제명
- Molecular biology
- 일반주제명
- Developmental biology
- 일반주제명
- Physiology
- 키워드
- Growth control
- 키워드
- Drosophila wings
- 기타저자
- Northwestern University Interdepartmental Biological Sciences (IBiS) Graduate Program
- 기본자료저록
- Dissertations Abstracts International. 85-10B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017160324
■00520250211150957
■006m o d
■007cr#unu||||||||
■020 ▼a9798381975109
■035 ▼a(MiAaPQ)AAI30993677
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a574
■1001 ▼aLiu, Andrew.
■24510▼aFat and Dachsous Regulate Growth Rate and Relative Size in Drosophila Wings
■260 ▼a[Sl]▼bNorthwestern University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a226 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-10, Section: B.
■500 ▼aAdvisor: Carthew, Richard.
■5021 ▼aThesis (Ph.D.)--Northwestern University, 2024.
■520 ▼aGrowth control is a fundamental aspect of developmental biology. Organs have proper growth rates proportional to the body and standard final sizes to ensure form and function. In this thesis, I investigate the mechanism of growth control at the end of the larval stages in the Drosophila wing imaginal disc. The atypical cadherins Fat and Dachsous (Ds) are known tumor suppressors that signal through the Hippo pathway. Previous studies had characterized the overgrowth phenotype in fat and ds mutants and hypothesized that the graded Ds expression may control growth via the positional information model. This model suggests that cells can measure the local gradient of Ds, divide if the gradient is high, and stop growth if the gradient is below a certain threshold.Here, I quantitatively measured the growth rate of the wing disc, separating the wing pouch and notum, relative to the body in the third larval instar. I showed that the overgrowth in fat and ds mutants can be attributed to both increased growth rate and delayed growth cessation. The duration of the cell cycle increased linearly with wing size. I showed that Fat-Ds signaling enhances the rate at which the cell cycle lengthens with wing size, thus diminishing the linear rate of wing growth. Finally, I examined the dynamics of Fat and Ds protein distribution in the wing, observing graded distributions that change during growth. Unexpectedly, I found a graded Fat expression pattern that gradually shallows and completely flattens as growth ends. Contrarily, the graded Ds expression pattern was size invariant. Therefore, I hypothesize that Fat is the actual candidate for the positional information model in growth control of the wing pouch.
■590 ▼aSchool code: 0163.
■650 4▼aMolecular biology
■650 4▼aDevelopmental biology
■650 4▼aPhysiology
■653 ▼aGrowth control
■653 ▼aFat expression pattern
■653 ▼aDrosophila wings
■690 ▼a0307
■690 ▼a0758
■690 ▼a0719
■71020▼aNorthwestern University▼bInterdepartmental Biological Sciences (IBiS) Graduate Program.
■7730 ▼tDissertations Abstracts International▼g85-10B.
■790 ▼a0163
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160324▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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