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A Bioluminescent Approach to Coxiella burnetii Pathogenesis: Development and Utilization of an In Vivo Imaging Model
A Bioluminescent Approach to Coxiella burnetii Pathogenesis: Development and Utilization of an In Vivo Imaging Model
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103028
- ISBN
- 9798286425273
- DDC
- 576
- 서명/저자
- A Bioluminescent Approach to Coxiella burnetii Pathogenesis: Development and Utilization of an In Vivo Imaging Model
- 발행사항
- [Sl] : Yale University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 152 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisor: Roy, Craig Russell.
- 학위논문주기
- Thesis (Ph.D.)--Yale University, 2025.
- 초록/해제
- 요약Coxiella burnetii is a Gram-negative, obligate intracellular bacterium that infects livestock and causes Q fever in humans, which can range from acute flu-like symptoms to severe, persistent infections. C. burnetii relies on a Dot/Icm type IVB secretion system to translocate effector proteins, manipulating host cell processes to support intracellular replication. While axenic media have facilitated in vitro pathogenesis research, in vivo studies remain limited due to the classification of the virulent Nine Mile phase I strain as a category B select agent. Although the avirulent phase II strain RSA493 is exempt from this classification, it is rapidly cleared in immunocompetent mouse models, restricting its use in in vivo studies. However, SCID mice have shown susceptibility to phase II infection, offering a viable model. To expand accessible in vivo C. burnetii research, I developed a bioluminescent imaging (BLI) model, enabling non-invasive tracking of infection dynamics and effector phenotypes.Here, I performed a series of studies demonstrating that phase II C. burnetii can infect A/J and C57BL/6 mouse models and that BLI enables precise tracking of bacterial burden. Furthermore, BLI allows for sensitive detection of virulence differences, including both severe Dot/Icm-dependent defects and subtle effects of individual effector protein mutants such as emcA::Tn. This technique can also be used to investigate host determinants of disease, as demonstrated using the complement C3 knockout mouse model to better understand the role of this protein in phase II C. burnetii clearance.Beyond in vivo imaging, BLI has also proven valuable ex vivo, revealing that visceral adipose tissue serves as a primary replication site for C. burnetii following intraperitoneal infection. Follow-up experiments confirmed that C. burnetii replicates in adipocytes both in vitro and in vivo. These findings suggest that adipose tissue represents a previously unrecognized niche for C. burnetii replication, offering potential insights into persistent infections in Q fever patients.Overall, this dissertation introduces a widely accessible and versatile model for studying phase II C. burnetii pathogenesis in vivo and highlights the utility of BLI for accurately tracking bacterial burden, assessing virulence differences, and analyzing host immune responses, further advancing C. burnetii pathogenesis research.
- 일반주제명
- Microbiology
- 일반주제명
- Immunology
- 일반주제명
- Pathology
- 일반주제명
- Molecular biology
- 키워드
- Adipose
- 키워드
- Pathogenesis
- 기타저자
- Yale University Microbiology
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■006m o d
■007cr#unu||||||||
■020 ▼a9798286425273
■035 ▼a(MiAaPQ)AAI31845518
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a576
■1001 ▼aAndrews, Jenna Myr.
■24512▼aA Bioluminescent Approach to Coxiella burnetii Pathogenesis: Development and Utilization of an In Vivo Imaging Model
■260 ▼a[Sl]▼bYale University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a152 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisor: Roy, Craig Russell.
■5021 ▼aThesis (Ph.D.)--Yale University, 2025.
■520 ▼aCoxiella burnetii is a Gram-negative, obligate intracellular bacterium that infects livestock and causes Q fever in humans, which can range from acute flu-like symptoms to severe, persistent infections. C. burnetii relies on a Dot/Icm type IVB secretion system to translocate effector proteins, manipulating host cell processes to support intracellular replication. While axenic media have facilitated in vitro pathogenesis research, in vivo studies remain limited due to the classification of the virulent Nine Mile phase I strain as a category B select agent. Although the avirulent phase II strain RSA493 is exempt from this classification, it is rapidly cleared in immunocompetent mouse models, restricting its use in in vivo studies. However, SCID mice have shown susceptibility to phase II infection, offering a viable model. To expand accessible in vivo C. burnetii research, I developed a bioluminescent imaging (BLI) model, enabling non-invasive tracking of infection dynamics and effector phenotypes.Here, I performed a series of studies demonstrating that phase II C. burnetii can infect A/J and C57BL/6 mouse models and that BLI enables precise tracking of bacterial burden. Furthermore, BLI allows for sensitive detection of virulence differences, including both severe Dot/Icm-dependent defects and subtle effects of individual effector protein mutants such as emcA::Tn. This technique can also be used to investigate host determinants of disease, as demonstrated using the complement C3 knockout mouse model to better understand the role of this protein in phase II C. burnetii clearance.Beyond in vivo imaging, BLI has also proven valuable ex vivo, revealing that visceral adipose tissue serves as a primary replication site for C. burnetii following intraperitoneal infection. Follow-up experiments confirmed that C. burnetii replicates in adipocytes both in vitro and in vivo. These findings suggest that adipose tissue represents a previously unrecognized niche for C. burnetii replication, offering potential insights into persistent infections in Q fever patients.Overall, this dissertation introduces a widely accessible and versatile model for studying phase II C. burnetii pathogenesis in vivo and highlights the utility of BLI for accurately tracking bacterial burden, assessing virulence differences, and analyzing host immune responses, further advancing C. burnetii pathogenesis research.
■590 ▼aSchool code: 0265.
■650 4▼aMicrobiology
■650 4▼aImmunology
■650 4▼aPathology
■650 4▼aMolecular biology
■653 ▼aAdipose
■653 ▼aBioluminescence imaging
■653 ▼aCoxiella burnetii
■653 ▼aPathogenesis
■690 ▼a0410
■690 ▼a0982
■690 ▼a0307
■690 ▼a0571
■71020▼aYale University▼bMicrobiology.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■790 ▼a0265
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17356746▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


