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Fleet-Footed Soldiers: Circulating Memory CD8 T Cells Quickly Enter the Fray During Malarial and Bacterial Infection of the Liver- [electronic resource]
Fleet-Footed Soldiers: Circulating Memory CD8 T Cells Quickly Enter the Fray During Malarial and Bacterial Infection of the Liver- [electronic resource]
상세정보
- 자료유형
- 학위논문
- Control Number
- 0016931564
- International Standard Book Number
- 9798379785277
- Dewey Decimal Classification Number
- 616.079
- Main Entry-Personal Name
- Lefebvre, Mitchell Neill.
- Publication, Distribution, etc. (Imprint
- [S.l.] : The University of Iowa., 2023
- Publication, Distribution, etc. (Imprint
- Ann Arbor : ProQuest Dissertations & Theses, 2023
- Physical Description
- 1 online resource(134 p.)
- General Note
- Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
- General Note
- Advisor: Harty, John T.
- Dissertation Note
- Thesis (Ph.D.)--The University of Iowa, 2023.
- Restrictions on Access Note
- This item must not be sold to any third party vendors.
- Summary, Etc.
- 요약The highly vascularized liver may coordinate immune responses to infection or inflammation, and this non-lymphoid tissue is also a key target of clinically relevant pathogens. Chief among these pathogens is Plasmodium, the causative parasite of malaria, a disease that causes hundreds of thousands of deaths annually. The Plasmodium parasite must productively infect the liver before it can progress to potentially deadly blood-stage infection. Other pathogens that may target the liver include the bacteria Listeria monocytogenes and commensal microbes that escape from the gastrointestinal tract to cause sepsis. Antigen-specific memory CD8 T cells may exert control over infectious diseases by killing pathogen-infected host cells. The mechanisms by which memory CD8 T cells clear liver-localized pathogens, however, remain incompletely characterized. These knowledge gaps hinder scientists' and physicians' ability to develop novel treatments for infectious diseases of the liver. My thesis work, therefore, focused on determining if and how subsets of phenotypically and functionally distinct memory CD8 T cells control liver-stage malaria and other infections.Using mouse models of liver-stage malaria, Listeria monocytogenes, and sepsis infections, I demonstrate that antigen-specific circulating effector memory CD8 T cells rapidly enter the malaria- or bacterially infected liver to exert control over the respective pathogen. This T cell recruitment relied on T-cell expressed LFA-1, liver phagocytes, and chemokine signaling. These findings highlighted the importance of considering circulating memory CD8 T cells when developing malaria vaccines. Also apparent in the data were unique differences between memory CD8 T cell recruitment to the liver as compared to other non-lymphoid tissues. These findings suggest that studying CD8 T cell biology in the context of liver infection may offer additional possibilities for combating human disease.I next set out to apply my findings about circulating memory CD8 T cell protective capacity in a translational context. To this end, I developed a murine vaccine strategy for malaria that both more accurately recapitulated human responses to parasite vaccination and generated large numbers of resident and circulating memory CD8 T cells. A mouse-human weight-normalized radiation attenuated sporozoite (RAS) vaccination dose in mice induced partial non-sterilizing immunity to liver-stage malaria, which is similar to a human response to single RAS vaccination. Mice boosted with subunit vaccines based on recombinant attenuated bacterial or viral pathogens expressing liver-stage protective CD8 T cell epitopes increased both the number of memory CD8 T cells and conferred sterilizing immunity to the mice. This immunity was maintained even when the subunit vaccines were delivered intramuscularly, which is more clinically deliverable route than intravenous injection. My findings therefore inform human malaria vaccine development by demonstrating (1) that circulating memory CD8 T cells are a potentially important target during human vaccination efforts and (2) that a single RAS vaccination can be optimized by following it with more readily producible and deliverable subunit booster immunizations.
- Subject Added Entry-Topical Term
- Immunology.
- Subject Added Entry-Topical Term
- Microbiology.
- Subject Added Entry-Topical Term
- Cellular biology.
- Index Term-Uncontrolled
- Circulating memory
- Index Term-Uncontrolled
- Listeria monocytogenes
- Index Term-Uncontrolled
- Liver-stage malaria
- Index Term-Uncontrolled
- Sporozoite
- Index Term-Uncontrolled
- T cell recruitment
- Index Term-Uncontrolled
- Vaccine
- Index Term-Uncontrolled
- CD8 T cells
- Index Term-Uncontrolled
- Viral pathogens
- Added Entry-Corporate Name
- The University of Iowa Immunology
- Host Item Entry
- Dissertations Abstracts International. 85-01B.
- Host Item Entry
- Dissertation Abstract International
- Electronic Location and Access
- 로그인을 한후 보실 수 있는 자료입니다.
- Control Number
- joongbu:643846
MARC
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■020 ▼a9798379785277
■035 ▼a(MiAaPQ)AAI30314395
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a616.079
■1001 ▼aLefebvre, Mitchell Neill.
■24510▼aFleet-Footed Soldiers: Circulating Memory CD8 T Cells Quickly Enter the Fray During Malarial and Bacterial Infection of the Liver▼h[electronic resource]
■260 ▼a[S.l.]▼bThe University of Iowa. ▼c2023
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2023
■300 ▼a1 online resource(134 p.)
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-01, Section: B.
■500 ▼aAdvisor: Harty, John T.
■5021 ▼aThesis (Ph.D.)--The University of Iowa, 2023.
■506 ▼aThis item must not be sold to any third party vendors.
■520 ▼aThe highly vascularized liver may coordinate immune responses to infection or inflammation, and this non-lymphoid tissue is also a key target of clinically relevant pathogens. Chief among these pathogens is Plasmodium, the causative parasite of malaria, a disease that causes hundreds of thousands of deaths annually. The Plasmodium parasite must productively infect the liver before it can progress to potentially deadly blood-stage infection. Other pathogens that may target the liver include the bacteria Listeria monocytogenes and commensal microbes that escape from the gastrointestinal tract to cause sepsis. Antigen-specific memory CD8 T cells may exert control over infectious diseases by killing pathogen-infected host cells. The mechanisms by which memory CD8 T cells clear liver-localized pathogens, however, remain incompletely characterized. These knowledge gaps hinder scientists' and physicians' ability to develop novel treatments for infectious diseases of the liver. My thesis work, therefore, focused on determining if and how subsets of phenotypically and functionally distinct memory CD8 T cells control liver-stage malaria and other infections.Using mouse models of liver-stage malaria, Listeria monocytogenes, and sepsis infections, I demonstrate that antigen-specific circulating effector memory CD8 T cells rapidly enter the malaria- or bacterially infected liver to exert control over the respective pathogen. This T cell recruitment relied on T-cell expressed LFA-1, liver phagocytes, and chemokine signaling. These findings highlighted the importance of considering circulating memory CD8 T cells when developing malaria vaccines. Also apparent in the data were unique differences between memory CD8 T cell recruitment to the liver as compared to other non-lymphoid tissues. These findings suggest that studying CD8 T cell biology in the context of liver infection may offer additional possibilities for combating human disease.I next set out to apply my findings about circulating memory CD8 T cell protective capacity in a translational context. To this end, I developed a murine vaccine strategy for malaria that both more accurately recapitulated human responses to parasite vaccination and generated large numbers of resident and circulating memory CD8 T cells. A mouse-human weight-normalized radiation attenuated sporozoite (RAS) vaccination dose in mice induced partial non-sterilizing immunity to liver-stage malaria, which is similar to a human response to single RAS vaccination. Mice boosted with subunit vaccines based on recombinant attenuated bacterial or viral pathogens expressing liver-stage protective CD8 T cell epitopes increased both the number of memory CD8 T cells and conferred sterilizing immunity to the mice. This immunity was maintained even when the subunit vaccines were delivered intramuscularly, which is more clinically deliverable route than intravenous injection. My findings therefore inform human malaria vaccine development by demonstrating (1) that circulating memory CD8 T cells are a potentially important target during human vaccination efforts and (2) that a single RAS vaccination can be optimized by following it with more readily producible and deliverable subunit booster immunizations.
■590 ▼aSchool code: 0096.
■650 4▼aImmunology.
■650 4▼aMicrobiology.
■650 4▼aCellular biology.
■653 ▼aCirculating memory
■653 ▼aListeria monocytogenes
■653 ▼aLiver-stage malaria
■653 ▼aSporozoite
■653 ▼aT cell recruitment
■653 ▼aVaccine
■653 ▼aCD8 T cells
■653 ▼aViral pathogens
■690 ▼a0982
■690 ▼a0379
■690 ▼a0410
■71020▼aThe University of Iowa▼bImmunology.
■7730 ▼tDissertations Abstracts International▼g85-01B.
■773 ▼tDissertation Abstract International
■790 ▼a0096
■791 ▼aPh.D.
■792 ▼a2023
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16931564▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
■980 ▼a202402▼f2024
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