서브메뉴
검색
Distinct Tumor Cell State Transitions Driven by Epigenetic Factors Contribute to Basal Cell Carcinoma Therapy Resistance
Distinct Tumor Cell State Transitions Driven by Epigenetic Factors Contribute to Basal Cell Carcinoma Therapy Resistance
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104739
- ISBN
- 9798290652672
- DDC
- 570
- 서명/저자
- Distinct Tumor Cell State Transitions Driven by Epigenetic Factors Contribute to Basal Cell Carcinoma Therapy Resistance
- 발행사항
- [Sl] : Stanford University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 142 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-01, Section: B.
- 주기사항
- Advisor: Oro, Anthony.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2025.
- 초록/해제
- 요약Overcoming tumor evolution and therapy resistance remains the main challenge to creating successful anti-tumor therapies. Basal cell carcinoma (BCC) is not only the most common type of skin cancer but also the most common cancer, making it an ideal model for investigating tumor evolution and tumor cell state transition due to the availability of patient samples and the feasibility to track disease progression over time.The skin is composed of multiple epithelial components such as the interfollicular epidermis (IFE) and hair follicle (HF), which drive normal tissue homeostasis and regenerative processes. Although the processes that govern normal epithelial stem cell function are tightly governed, stem cell function can be misregulated and lead to cancer. BCC tumor growth is driven by sonic hedgehog (SHH) signaling, a critical developmental and regenerative signaling pathway. SHH signaling is driven by the binding of hedgehog (HH) ligands to the PTCHD1 receptor, leading to loss of the repression on smoothened (SMO), driving the translocation of the transcription factor GLI1 into the nucleus, which subsequently drives the growth and proliferative processes associated with tumorigenesis. SMO inhibitors (SMOi) like Vismodegib have been used to treat patients with locally advanced disease, however, in many cases, SMOihave either been (1) ineffective or (2) provide temporary inhibition of tumor growth before developing resistance.Various mechanisms underlie BCC therapy resistance. Genetic mutations of SMO account for around 50% of resistance cases where gain-of-function mutations render Hh signaling constitutively active despite the presence of SMOi. Epigenetic factors account for the other 50% of resistance cases where cell-autonomous or environmental changes contribute to pathway switching that renders BCCs independent of Hh signaling for survival along with the activation of alternative pathways.Here, we focused on identifying and deeply elucidating novel epigenetic mechanisms that BCCs undertake to achieve therapy resistance. We identified two distinct developmental trajectories that BCCs could undertake prior to SMOitherapy that confer a selective advantage during therapy. Chapter 1 will focus on basal-to-squamous cell carcinoma transition (BST) as a carcinoma tumor-intrinsic resistance pathway driven by activation of AP-1 family of transcription factors. Chapter 2 will focus on basal-to-inflammatory transition (BIT) as an environmentally-induced resistance pathway driven by NF-kB signaling in tumor epithelia that are associated with a specialized inflammatory environment defined by a TREM1 myeloid signature. While both resistance pathways are characterized by reversible tumor cell state changes, the induced tumor cell states display distinct markers for identification, are localized in distinct spatial neighborhoods within the tumor, and are driven by distinct epigenetic pathways. Our work provides critical insights into both BST and BIT resistant states as novel targetable tumor states that provide unique therapeutic opportunities to overcome tumor resistance.
- 일반주제명
- Growth factors
- 일반주제명
- Cells
- 일반주제명
- Gene expression
- 일반주제명
- Cancer therapies
- 일반주제명
- Cloning
- 일반주제명
- Follicles
- 일반주제명
- Squamous cell carcinoma
- 일반주제명
- Epigenetics
- 일반주제명
- Keratin
- 일반주제명
- Genomics
- 일반주제명
- Phosphorylation
- 일반주제명
- Tumors
- 일반주제명
- Morphology
- 일반주제명
- Transcription factors
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 87-01B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017358699
■00520260202104739
■006m o d
■007cr#unu||||||||
■020 ▼a9798290652672
■035 ▼a(MiAaPQ)AAI32149686
■035 ▼a(MiAaPQ)Stanfordmk213qn3144
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a570
■1001 ▼aLi, Nancy Yanzhe.
■24510▼aDistinct Tumor Cell State Transitions Driven by Epigenetic Factors Contribute to Basal Cell Carcinoma Therapy Resistance
■260 ▼a[Sl]▼bStanford University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a142 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-01, Section: B.
■500 ▼aAdvisor: Oro, Anthony.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2025.
■520 ▼aOvercoming tumor evolution and therapy resistance remains the main challenge to creating successful anti-tumor therapies. Basal cell carcinoma (BCC) is not only the most common type of skin cancer but also the most common cancer, making it an ideal model for investigating tumor evolution and tumor cell state transition due to the availability of patient samples and the feasibility to track disease progression over time.The skin is composed of multiple epithelial components such as the interfollicular epidermis (IFE) and hair follicle (HF), which drive normal tissue homeostasis and regenerative processes. Although the processes that govern normal epithelial stem cell function are tightly governed, stem cell function can be misregulated and lead to cancer. BCC tumor growth is driven by sonic hedgehog (SHH) signaling, a critical developmental and regenerative signaling pathway. SHH signaling is driven by the binding of hedgehog (HH) ligands to the PTCHD1 receptor, leading to loss of the repression on smoothened (SMO), driving the translocation of the transcription factor GLI1 into the nucleus, which subsequently drives the growth and proliferative processes associated with tumorigenesis. SMO inhibitors (SMOi) like Vismodegib have been used to treat patients with locally advanced disease, however, in many cases, SMOihave either been (1) ineffective or (2) provide temporary inhibition of tumor growth before developing resistance.Various mechanisms underlie BCC therapy resistance. Genetic mutations of SMO account for around 50% of resistance cases where gain-of-function mutations render Hh signaling constitutively active despite the presence of SMOi. Epigenetic factors account for the other 50% of resistance cases where cell-autonomous or environmental changes contribute to pathway switching that renders BCCs independent of Hh signaling for survival along with the activation of alternative pathways.Here, we focused on identifying and deeply elucidating novel epigenetic mechanisms that BCCs undertake to achieve therapy resistance. We identified two distinct developmental trajectories that BCCs could undertake prior to SMOitherapy that confer a selective advantage during therapy. Chapter 1 will focus on basal-to-squamous cell carcinoma transition (BST) as a carcinoma tumor-intrinsic resistance pathway driven by activation of AP-1 family of transcription factors. Chapter 2 will focus on basal-to-inflammatory transition (BIT) as an environmentally-induced resistance pathway driven by NF-kB signaling in tumor epithelia that are associated with a specialized inflammatory environment defined by a TREM1 myeloid signature. While both resistance pathways are characterized by reversible tumor cell state changes, the induced tumor cell states display distinct markers for identification, are localized in distinct spatial neighborhoods within the tumor, and are driven by distinct epigenetic pathways. Our work provides critical insights into both BST and BIT resistant states as novel targetable tumor states that provide unique therapeutic opportunities to overcome tumor resistance.
■590 ▼aSchool code: 0212.
■650 4▼aGrowth factors
■650 4▼aCells
■650 4▼aGene expression
■650 4▼aCancer therapies
■650 4▼aCloning
■650 4▼aFollicles
■650 4▼aSquamous cell carcinoma
■650 4▼aTumor necrosis factor-TNF
■650 4▼aEpigenetics
■650 4▼aKeratin
■650 4▼aGenomics
■650 4▼aPhosphorylation
■650 4▼aTumors
■650 4▼aMorphology
■650 4▼aTranscription factors
■690 ▼a0287
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g87-01B.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358699▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


