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The Role of Hedgehog Signaling in Lipid Metabolism and Cancer
The Role of Hedgehog Signaling in Lipid Metabolism and Cancer
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151007
- ISBN
- 9798381972054
- DDC
- 574
- 서명/저자
- The Role of Hedgehog Signaling in Lipid Metabolism and Cancer
- 발행사항
- [Sl] : University of California, San Francisco, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 160 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-09, Section: B.
- 주기사항
- Advisor: Reiter, Jeremy.
- 학위논문주기
- Thesis (Ph.D.)--University of California, San Francisco, 2024.
- 초록/해제
- 요약The Hedgehog (Hh) family of lipid-modified signaling proteins directs embryonic development and tissue homeostasis, and dysregulated Hh signaling drives familial and sporadic cancers. Hh ligands bind to and inhibit the tumor suppressor Patched (PTCH) and allow the oncoprotein Smoothened (SMO) to accumulate in cilia, which in turn activates the GLI family of transcription factors. Recent work has demonstrated that oxysterol lipids bind and modulate SMO activity. This thesis explores the central theme that lipids regulate the Hh pathway which in turn regulates lipid metabolism. First, I review the myriad of sterols that activate or inhibit the Hedgehog pathway. I discuss the possibility utility of Smo ligands or inhibitors in sterol metabolism as cancer therapeutics. Next, I define the Hh gene expression program using RNA sequencing of cultured cells treated with ciliary ligands, human BCCs, and Hh-associated medulloblastomas from humans and mice. These results reveal Hh target genes such as the oxysterol synthase Hsd11β1 and the adipokine Retnla regulate lipid metabolism to drive cell fate decisions in response to Hh pathway activation. Lastly, I demonstrate that Hedgehog signaling can be co-opted to drive resistance to pharmacological blockade of CDK6, an important single-agent molecular therapy in cancer therapeutics. Through CRISPR screens and RNA-sequencing of a mouse model of HH-associated medulloblastoma with genetic deletion of Cdk6, I demonstrate that decreased ribosomal protein expression underlies resistance to CDK6 inhibition in HH-associated medulloblastoma, leading to endoplasmic reticular (ER) stress and activation of the unfolded protein response (UPR). I then demonstrate concurrent genetic deletion or pharmacological inhibition of CDK6 and HSD11s2, an enzyme producing Smoothened-activating lipids, additively blocked cancer growth in multiple mouse genetic models of HH-associated medulloblastoma. In sum, this research program demonstrates that lipid signaling is an avenue to target Hh-dependent cancers and I demonstrate a proof-of-principle therapeutic to target lipid signaling in Hh signaling.
- 일반주제명
- Biology
- 일반주제명
- Pharmacology
- 일반주제명
- Cellular biology
- 일반주제명
- Genetics
- 키워드
- Cilia
- 키워드
- Hedgehog
- 키워드
- Lipids
- 키워드
- Medulloblastoma
- 기타저자
- University of California, San Francisco Biomedical Sciences
- 기본자료저록
- Dissertations Abstracts International. 85-09B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211151007
■006m o d
■007cr#unu||||||||
■020 ▼a9798381972054
■035 ▼a(MiAaPQ)AAI30995028
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a574
■1001 ▼aDaggubati, Vikas.▼0(orcid)0000-0002-9779-4614
■24510▼aThe Role of Hedgehog Signaling in Lipid Metabolism and Cancer
■260 ▼a[Sl]▼bUniversity of California, San Francisco▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a160 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-09, Section: B.
■500 ▼aAdvisor: Reiter, Jeremy.
■5021 ▼aThesis (Ph.D.)--University of California, San Francisco, 2024.
■520 ▼aThe Hedgehog (Hh) family of lipid-modified signaling proteins directs embryonic development and tissue homeostasis, and dysregulated Hh signaling drives familial and sporadic cancers. Hh ligands bind to and inhibit the tumor suppressor Patched (PTCH) and allow the oncoprotein Smoothened (SMO) to accumulate in cilia, which in turn activates the GLI family of transcription factors. Recent work has demonstrated that oxysterol lipids bind and modulate SMO activity. This thesis explores the central theme that lipids regulate the Hh pathway which in turn regulates lipid metabolism. First, I review the myriad of sterols that activate or inhibit the Hedgehog pathway. I discuss the possibility utility of Smo ligands or inhibitors in sterol metabolism as cancer therapeutics. Next, I define the Hh gene expression program using RNA sequencing of cultured cells treated with ciliary ligands, human BCCs, and Hh-associated medulloblastomas from humans and mice. These results reveal Hh target genes such as the oxysterol synthase Hsd11β1 and the adipokine Retnla regulate lipid metabolism to drive cell fate decisions in response to Hh pathway activation. Lastly, I demonstrate that Hedgehog signaling can be co-opted to drive resistance to pharmacological blockade of CDK6, an important single-agent molecular therapy in cancer therapeutics. Through CRISPR screens and RNA-sequencing of a mouse model of HH-associated medulloblastoma with genetic deletion of Cdk6, I demonstrate that decreased ribosomal protein expression underlies resistance to CDK6 inhibition in HH-associated medulloblastoma, leading to endoplasmic reticular (ER) stress and activation of the unfolded protein response (UPR). I then demonstrate concurrent genetic deletion or pharmacological inhibition of CDK6 and HSD11s2, an enzyme producing Smoothened-activating lipids, additively blocked cancer growth in multiple mouse genetic models of HH-associated medulloblastoma. In sum, this research program demonstrates that lipid signaling is an avenue to target Hh-dependent cancers and I demonstrate a proof-of-principle therapeutic to target lipid signaling in Hh signaling.
■590 ▼aSchool code: 0034.
■650 4▼aBiology
■650 4▼aPharmacology
■650 4▼aCellular biology
■650 4▼aGenetics
■653 ▼aBasal cell carcinoma
■653 ▼aCilia
■653 ▼aHedgehog
■653 ▼aLipids
■653 ▼aMedulloblastoma
■690 ▼a0306
■690 ▼a0419
■690 ▼a0379
■690 ▼a0369
■71020▼aUniversity of California, San Francisco▼bBiomedical Sciences.
■7730 ▼tDissertations Abstracts International▼g85-09B.
■790 ▼a0034
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160378▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


