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Complex N-Glycosylation in Anti-tumor Immunity
Complex N-Glycosylation in Anti-tumor Immunity
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152001
- ISBN
- 9798384024613
- DDC
- 616.99
- 서명/저자
- Complex N-Glycosylation in Anti-tumor Immunity
- 발행사항
- [Sl] : University of Pennsylvania, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 117 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
- 주기사항
- Advisor: Stanger, Ben Z.
- 학위논문주기
- Thesis (Ph.D.)--University of Pennsylvania, 2024.
- 초록/해제
- 요약Pancreatic ductal adenocarcinoma (PDAC) is currently the third leading cause of cancer-related death in the United States. The five-year survival rate of thirteen percent can be attributed to a difficulty in early detection and a lack of effective treatments. Tumor-associated glycans represent a potential anti-tumor target for two reasons: (i) protein glycosylation is known to play a role in tumor progression, and (ii) alternatively glycosylated proteins may function as tumor neoantigens. The glycosyltransferase Mgat5 catalyzes the formation of β1,6-N-acetylglucosamine branched glycans, and overexpression has been implicated in tumor growth and metastasis in multiple cancers. Using a panel of clonal cell lines that recapitulate the immune heterogeneity of PDAC, we found that knockout of Mgat5 led to a significant and replicable decrease in tumor growth. This occurred not only in immune hot, "T cell-inflamed" tumors, but also the immunosuppressive "non-T cell-inflamed" tumors. Within these Mgat5 knockout tumors, CD8+ T cell infiltration was increased, and the cytotoxicity of both CD4+ and CD8+ T cells as measured by TNF⍺, IFNγ, and granzyme B content was increased in the draining lymph nodes of tumors. Clearance of the knockout tumors was found to be dependent upon functional CD4+ and CD8+ T cells as well as dendritic cells, with NK cells playing only an early role in immune clearance. Mechanistically, Mgat5 KO cells were found to have significantly increased sensitivity to cell death via the TNF⍺ or TRAIL pathway, with death proceeding through either the necroptotic or apoptotic pathways respectively. Taken together, these results are consistent with a model in which loss of Mgat5-mediated N-glycans increases the sensitivity of tumors to T cell killing through lowering the threshold for engagement of the extrinsic cell death pathway and allowing for the formation of a durable immune response. Finally, Mgat5 knockout tumors treated with immune checkpoint blockade had significantly decreased tumor size and increased survival over controls, suggesting Mgat5 has potential as a novel target for pancreatic cancer.
- 일반주제명
- Oncology
- 일반주제명
- Cellular biology
- 일반주제명
- Immunology
- 일반주제명
- Biochemistry
- 키워드
- Cancer
- 키워드
- Glycosylation
- 키워드
- GnT-V
- 키워드
- MGAT5
- 키워드
- Pancreas
- 기타저자
- University of Pennsylvania Cell and Molecular Biology
- 기본자료저록
- Dissertations Abstracts International. 86-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152001
■006m o d
■007cr#unu||||||||
■020 ▼a9798384024613
■035 ▼a(MiAaPQ)AAI31329991
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a616.99
■1001 ▼aHollander, Erin E.
■24510▼aComplex N-Glycosylation in Anti-tumor Immunity
■260 ▼a[Sl]▼bUniversity of Pennsylvania▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a117 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-02, Section: B.
■500 ▼aAdvisor: Stanger, Ben Z.
■5021 ▼aThesis (Ph.D.)--University of Pennsylvania, 2024.
■520 ▼aPancreatic ductal adenocarcinoma (PDAC) is currently the third leading cause of cancer-related death in the United States. The five-year survival rate of thirteen percent can be attributed to a difficulty in early detection and a lack of effective treatments. Tumor-associated glycans represent a potential anti-tumor target for two reasons: (i) protein glycosylation is known to play a role in tumor progression, and (ii) alternatively glycosylated proteins may function as tumor neoantigens. The glycosyltransferase Mgat5 catalyzes the formation of β1,6-N-acetylglucosamine branched glycans, and overexpression has been implicated in tumor growth and metastasis in multiple cancers. Using a panel of clonal cell lines that recapitulate the immune heterogeneity of PDAC, we found that knockout of Mgat5 led to a significant and replicable decrease in tumor growth. This occurred not only in immune hot, "T cell-inflamed" tumors, but also the immunosuppressive "non-T cell-inflamed" tumors. Within these Mgat5 knockout tumors, CD8+ T cell infiltration was increased, and the cytotoxicity of both CD4+ and CD8+ T cells as measured by TNF⍺, IFNγ, and granzyme B content was increased in the draining lymph nodes of tumors. Clearance of the knockout tumors was found to be dependent upon functional CD4+ and CD8+ T cells as well as dendritic cells, with NK cells playing only an early role in immune clearance. Mechanistically, Mgat5 KO cells were found to have significantly increased sensitivity to cell death via the TNF⍺ or TRAIL pathway, with death proceeding through either the necroptotic or apoptotic pathways respectively. Taken together, these results are consistent with a model in which loss of Mgat5-mediated N-glycans increases the sensitivity of tumors to T cell killing through lowering the threshold for engagement of the extrinsic cell death pathway and allowing for the formation of a durable immune response. Finally, Mgat5 knockout tumors treated with immune checkpoint blockade had significantly decreased tumor size and increased survival over controls, suggesting Mgat5 has potential as a novel target for pancreatic cancer.
■590 ▼aSchool code: 0175.
■650 4▼aOncology
■650 4▼aCellular biology
■650 4▼aImmunology
■650 4▼aBiochemistry
■653 ▼aCancer
■653 ▼aGlycosylation
■653 ▼aGnT-V
■653 ▼aMGAT5
■653 ▼aPancreas
■690 ▼a0992
■690 ▼a0379
■690 ▼a0982
■690 ▼a0487
■71020▼aUniversity of Pennsylvania▼bCell and Molecular Biology.
■7730 ▼tDissertations Abstracts International▼g86-02B.
■790 ▼a0175
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162343▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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