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The Isoform Impact: Investigating the Role of Short-Form Ron in Breast Cancer Metastasis
The Isoform Impact: Investigating the Role of Short-Form Ron in Breast Cancer Metastasis
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103051
- ISBN
- 9798293834907
- DDC
- 616.99
- 서명/저자
- The Isoform Impact: Investigating the Role of Short-Form Ron in Breast Cancer Metastasis
- 발행사항
- [Sl] : The University of Utah, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 199 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
- 주기사항
- Advisor: Welm, Alana Lee.
- 학위논문주기
- Thesis (D.Phil.)--The University of Utah, 2025.
- 초록/해제
- 요약Breast cancer is the most common type of cancer and is the leading cause of cancer-related deaths among women worldwide. However, around 30% of breast cancer patients eventually develop metastatic disease, which is incurable, leading to a decrease in their 5-year survival rate to about 29%. Ron receptor tyrosine kinase has been identified to be a key mediator of breast cancer metastasis. Higher levels of Ron expression have been shown to correlate with more aggressive disease, increased metastatic potential, and reduced survival rates in patients. Multiple isoforms of Ron that produced by alternative splicing or protein truncation have been identified in various cancers. Short-form Ron (sfRon), generated from an alternative promoter within the Ron locus, is the major alternative isoform in breast cancer.Studies from the Welm lab and others have shown that Ron or sfRon expression in breast cancer cell lines and patient-derived xenograft (PDX) models promote spontaneous metastasis from mammary tumors to bone, lung, and liver. In mouse models, the Welm lab found that the absence of both Ron and sfRon led to a significant reduction in lung and bone metastasis compared to normal wild-type mice. Notably, deletion of host sfRon alone nearly eliminated metastasis, indicating its crucial role in the metastatic process. While Ron has received considerable attention, sfRon remains understudied despite its potential significance. Given its relative lack of investigation, the focus of this dissertation is centered on comprehending the specific contribution and impact of sfRon on metastatic phenotypes.I employed CRISPR activation (CRISPRa), a powerful tool for precisely regulating gene expression in mouse mammary tumor cells, to study if the upregulation of endogenous sfRon drives metastasis. I first verified dCas9 binding, promoter activation, and sfRon gene expression from chromatin immunoprecipitation and RNA sequencing studies. I found that CRISPRa-mediated endogenous upregulation, but not cDNA overexpression of sfRon, resulted in increased lung metastasis in mice. I also found that this phenotype was specific to sfRon mRNA, as knockdown of sfRon mRNA reverted this metastatic phenotype. These findings highlight the significance of sfRon as a potential therapeutic target for the development of effective treatments and improved outcomes in breast cancer.
- 일반주제명
- Oncology
- 일반주제명
- Public health
- 일반주제명
- Genetics
- 키워드
- Breast cancer
- 키워드
- Ron expression
- 키워드
- Mammary tumors
- 기타저자
- The University of Utah Oncological Sciences
- 기본자료저록
- Dissertations Abstracts International. 87-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202103051
■006m o d
■007cr#unu||||||||
■020 ▼a9798293834907
■035 ▼a(MiAaPQ)AAI31931852
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a616.99
■1001 ▼aViswanath, Pavitra.
■24510▼aThe Isoform Impact: Investigating the Role of Short-Form Ron in Breast Cancer Metastasis
■260 ▼a[Sl]▼bThe University of Utah▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a199 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-03, Section: B.
■500 ▼aAdvisor: Welm, Alana Lee.
■5021 ▼aThesis (D.Phil.)--The University of Utah, 2025.
■520 ▼aBreast cancer is the most common type of cancer and is the leading cause of cancer-related deaths among women worldwide. However, around 30% of breast cancer patients eventually develop metastatic disease, which is incurable, leading to a decrease in their 5-year survival rate to about 29%. Ron receptor tyrosine kinase has been identified to be a key mediator of breast cancer metastasis. Higher levels of Ron expression have been shown to correlate with more aggressive disease, increased metastatic potential, and reduced survival rates in patients. Multiple isoforms of Ron that produced by alternative splicing or protein truncation have been identified in various cancers. Short-form Ron (sfRon), generated from an alternative promoter within the Ron locus, is the major alternative isoform in breast cancer.Studies from the Welm lab and others have shown that Ron or sfRon expression in breast cancer cell lines and patient-derived xenograft (PDX) models promote spontaneous metastasis from mammary tumors to bone, lung, and liver. In mouse models, the Welm lab found that the absence of both Ron and sfRon led to a significant reduction in lung and bone metastasis compared to normal wild-type mice. Notably, deletion of host sfRon alone nearly eliminated metastasis, indicating its crucial role in the metastatic process. While Ron has received considerable attention, sfRon remains understudied despite its potential significance. Given its relative lack of investigation, the focus of this dissertation is centered on comprehending the specific contribution and impact of sfRon on metastatic phenotypes.I employed CRISPR activation (CRISPRa), a powerful tool for precisely regulating gene expression in mouse mammary tumor cells, to study if the upregulation of endogenous sfRon drives metastasis. I first verified dCas9 binding, promoter activation, and sfRon gene expression from chromatin immunoprecipitation and RNA sequencing studies. I found that CRISPRa-mediated endogenous upregulation, but not cDNA overexpression of sfRon, resulted in increased lung metastasis in mice. I also found that this phenotype was specific to sfRon mRNA, as knockdown of sfRon mRNA reverted this metastatic phenotype. These findings highlight the significance of sfRon as a potential therapeutic target for the development of effective treatments and improved outcomes in breast cancer.
■590 ▼aSchool code: 0240.
■650 4▼aOncology
■650 4▼aPublic health
■650 4▼aGenetics
■653 ▼aBreast cancer
■653 ▼aCancer metastasis
■653 ▼aPatient-derived xenograft
■653 ▼aRon expression
■653 ▼aMammary tumors
■690 ▼a0992
■690 ▼a0369
■690 ▼a0573
■71020▼aThe University of Utah▼bOncological Sciences.
■7730 ▼tDissertations Abstracts International▼g87-03B.
■790 ▼a0240
■791 ▼aD.Phil.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17356864▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


