서브메뉴
검색
상세정보
Roles of Cellular and Humoral Immunity in Drosophila Tumor-Host Interactions.
Roles of Cellular and Humoral Immunity in Drosophila Tumor-Host Interactions.
상세정보
- 자료유형
- 학위논문(국외)
- 기본표목-개인명
- 표제와 책임표시사항
- Roles of Cellular and Humoral Immunity in Drosophila Tumor-Host Interactions.
- 발행, 배포, 간사 사항
- 발행, 배포, 간사 사항
- 형태사항
- 105 p.
- 일반주기
- Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
- 일반주기
- Advisor: Bilder, David.
- 학위논문주기
- Thesis (Ph.D.)--University of California, Berkeley, 2025.
- 요약 등 주기
- 요약Cancer has plagued humanity for thousands of years and continues to be a leading cause of death globally. While tumor growth has been well-characterized, the interactions between a tumor and its host remain understudied. Long-distance tumor-host interactions are known as paraneoplastic syndromes - a class of diseases that affect various organs and present as diverse clinical symptoms. These interactions can be potent drivers for patient mortality, and a deeper understanding of them could have therapeutic benefits. One paraneoplastic syndrome of particular interest is that of the tumor and the immune system. This interaction is the foundation of powerful cancer immunotherapies, but aspects of the tumor-immune cell dynamic remain a mystery. In recent years, Drosophila melanogaster has emerged as a model system to study these and other tumor-host interactions. By leveraging the fly's powerful genetics and conserved biology, researchers can probe molecular mechanisms that would be difficult to study in mammals. Here, we used the powerful fly system to better understand cellular and humoral immunity and systemic responses to cancer. Tumor-immune interactions are important drivers of tumor growth and host lethality. Using an adult autochtonous ovarian carcinoma (OC) tumor model, we demonstrate that these tumors recruit macrophages similar to mammalian tumors and that the presence of tumor-associated macrophages slows tumor progression and increases host lifespan. Mammalian tumors acquire ways to evade the immune system; however, it is unknown whether fly tumors can do the same. Interestingly, OC tumors secrete a conserved GPI-linked protease inhibitor called Thioester-containing Protein 3 (Tep3), which we find restricts immune cell recognition of the tumor and thus accelerates tumor progression and host death. We show that Tep3 inhibits the matrix metalloprotease MMP1's proteolytic activity to prevent tumor basement membrane breakdown, a known recruitment signal for macrophages, and thus limit immune restriction of the tumor. Excitingly, Tep3 is also produced in wounds in conjunction with MMP1 where it similarly blocks macrophage recruitment to the wound by modulating MMP1 activity. Tep3 seems to act as a negative regulator of the inflammatory response to resolve inflammation and prevent tissue damage. Hence, the tumor is able to exploit this normal physiological anti-inflammatory mechanism to evade the immune system. Along with cellular responses, fly tumors also trigger humoral signaling that plays a vital role in tumor-host interactions. While previous work has focused on understanding effects exerted by the tumor on the host, I am interested in how host tissues systemically respond to a tumor. I used a transcriptomic approach to address this question. RNA sequencing of host fat body (the major secretory organ; analogous to human fat and liver) in the presence of a tumor uncovered upregulated factors predicted to be secreted from host fat body. Comparison of the response to tumor versus that to a novel serial clean wounding revealed that the tumor generates a distinct response in host fat, more akin to other chronic stresses like starvation. Using an allograft lifespan assay as a primary screen, I have identified candidates that when knocked down in the fat body affect cancer-induced host mortality. I have also built fly lines compatible with the lab's GAL4-independent tumor model that can now be used for further testing. These transcriptomes will be a valuable resource on systemic host response to tumors. Thus, my work has advanced our understanding of Drosophila tumor-immune cell interactions and laid a foundation for future studies on systemic host response.
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 비통제 색인어
- 비통제 색인어
- 비통제 색인어
- 비통제 색인어
- 비통제 색인어
- 부출표목-단체명
- 기본자료저록
- Dissertations Abstracts International. 87-04B.
- 전자적 위치 및 접속
- 원문정보보기
MARC
008260219s2025 us ||||||||||||||c||eng d■001000017359365
■00520260202105108
■006m o d
■007cr#unu||||||||
■020 ▼a9798297601451
■035 ▼a(MiAaPQ)AAI32236819
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a575
■1001 ▼aAdiga, Kavya.
■24510▼aRoles of Cellular and Humoral Immunity in Drosophila Tumor-Host Interactions.
■260 ▼a[S.l.]▼bUniversity of California, Berkeley. ▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a105 p.
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-04, Section: B.
■500 ▼aAdvisor: Bilder, David.
■5021 ▼aThesis (Ph.D.)--University of California, Berkeley, 2025.
■520 ▼aCancer has plagued humanity for thousands of years and continues to be a leading cause of death globally. While tumor growth has been well-characterized, the interactions between a tumor and its host remain understudied. Long-distance tumor-host interactions are known as paraneoplastic syndromes - a class of diseases that affect various organs and present as diverse clinical symptoms. These interactions can be potent drivers for patient mortality, and a deeper understanding of them could have therapeutic benefits. One paraneoplastic syndrome of particular interest is that of the tumor and the immune system. This interaction is the foundation of powerful cancer immunotherapies, but aspects of the tumor-immune cell dynamic remain a mystery. In recent years, Drosophila melanogaster has emerged as a model system to study these and other tumor-host interactions. By leveraging the fly's powerful genetics and conserved biology, researchers can probe molecular mechanisms that would be difficult to study in mammals. Here, we used the powerful fly system to better understand cellular and humoral immunity and systemic responses to cancer. Tumor-immune interactions are important drivers of tumor growth and host lethality. Using an adult autochtonous ovarian carcinoma (OC) tumor model, we demonstrate that these tumors recruit macrophages similar to mammalian tumors and that the presence of tumor-associated macrophages slows tumor progression and increases host lifespan. Mammalian tumors acquire ways to evade the immune system; however, it is unknown whether fly tumors can do the same. Interestingly, OC tumors secrete a conserved GPI-linked protease inhibitor called Thioester-containing Protein 3 (Tep3), which we find restricts immune cell recognition of the tumor and thus accelerates tumor progression and host death. We show that Tep3 inhibits the matrix metalloprotease MMP1's proteolytic activity to prevent tumor basement membrane breakdown, a known recruitment signal for macrophages, and thus limit immune restriction of the tumor. Excitingly, Tep3 is also produced in wounds in conjunction with MMP1 where it similarly blocks macrophage recruitment to the wound by modulating MMP1 activity. Tep3 seems to act as a negative regulator of the inflammatory response to resolve inflammation and prevent tissue damage. Hence, the tumor is able to exploit this normal physiological anti-inflammatory mechanism to evade the immune system. Along with cellular responses, fly tumors also trigger humoral signaling that plays a vital role in tumor-host interactions. While previous work has focused on understanding effects exerted by the tumor on the host, I am interested in how host tissues systemically respond to a tumor. I used a transcriptomic approach to address this question. RNA sequencing of host fat body (the major secretory organ; analogous to human fat and liver) in the presence of a tumor uncovered upregulated factors predicted to be secreted from host fat body. Comparison of the response to tumor versus that to a novel serial clean wounding revealed that the tumor generates a distinct response in host fat, more akin to other chronic stresses like starvation. Using an allograft lifespan assay as a primary screen, I have identified candidates that when knocked down in the fat body affect cancer-induced host mortality. I have also built fly lines compatible with the lab's GAL4-independent tumor model that can now be used for further testing. These transcriptomes will be a valuable resource on systemic host response to tumors. Thus, my work has advanced our understanding of Drosophila tumor-immune cell interactions and laid a foundation for future studies on systemic host response.
■590 ▼aSchool code: 0028.
■650 4▼aGenetics.
■650 4▼aCellular biology.
■650 4▼aOncology.
■650 4▼aImmunology.
■653 ▼aCancer
■653 ▼aRNA sequencing
■653 ▼aDrosophila melanogaster
■653 ▼aHumoral immunity
■653 ▼aMammalian tumors
■690 ▼a0369
■690 ▼a0379
■690 ▼a0992
■690 ▼a0982
■71020▼aUniversity of California, Berkeley▼bMolecular & Cell Biology.
■7730 ▼tDissertations Abstracts International▼g87-04B.
■790 ▼a0028
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359365▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


