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Impact of Class I Antigen Presentation Alterations in Melanoma- [electronic resource]
Impact of Class I Antigen Presentation Alterations in Melanoma- [electronic resource]
상세정보
- 자료유형
- 학위논문파일 국외
- 최종처리일시
- 20240214101915
- ISBN
- 9798380603935
- DDC
- 616.079
- 저자명
- Galvez, Mildred.
- 서명/저자
- Impact of Class I Antigen Presentation Alterations in Melanoma - [electronic resource]
- 발행사항
- [S.l.]: : University of California, Los Angeles., 2023
- 발행사항
- Ann Arbor : : ProQuest Dissertations & Theses,, 2023
- 형태사항
- 1 online resource(141 p.)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
- 주기사항
- Includes supplementary digital materials.
- 주기사항
- Advisor: Ribas, Antoni.
- 학위논문주기
- Thesis (Ph.D.)--University of California, Los Angeles, 2023.
- 사용제한주기
- This item must not be sold to any third party vendors.
- 초록/해제
- 요약Immune checkpoint blockade (ICB) targeting programmed cell death-1 (PD-1) has led to prolonged clinical responses among several patients with melanoma and other cancer types. ICB response relies on effective immune recognition and elimination of tumor cells. This depends on the successful presentation of tumor-specific antigens on surface major histocompatibility complex (MHC) class I molecules by tumor cells to the T-cell receptor of cytotoxic CD8+ T cells. Currently, both primary and acquired mechanisms of resistance remain significant barriers to expanding the therapeutic benefits of anti-PD-1 treatment. Several studies have stressed the critical role of antigen processing machinery (APM) defects in mediating resistance to ICB therapies. More specifically, aberrations of the β-2-microglobulin (B2M) gene, which encodes a critical component of the MHC class I molecule, were found to be enriched in patients with melanoma who progressed during therapy. Nevertheless, there are cases of patients with B2M-deficient tumors that respond to ICB, but the exact mechanism mediating this response is currently unknown. Presently, the exact effect of MHC class I APM alterations on anti-PD-1 therapy response requires further characterization and the cells mediating the anti-tumorigenic effects of PD-1 blockade in B2M-defective tumors have not been fully elucidated. In this work, we aim to holistically characterize alterations in components involved in class I antigen processing, presentation, and regulation in melanoma tumors, as well as to elucidate the main cell mediators of class I-deficient tumor removal in patient-derived biopsies and mouse models. Using a clinical dataset of patients with melanoma treated with ICB, whole-exome sequencing and bulk RNA-sequencing data from baseline tumor samples were analyzed to identify somatic class I APM alterations and evaluate correlative clinical outcomes, infiltrating immune cells, and gene expression patterns. Additionally, human melanoma cell lines and B2M-null mouse tumor models were utilized to validate these findings and further explore the impact of B2M and MHC class I defects on tumor intrinsic and extrinsic factors. Collectively, our findings may help offer alternative therapeutic targets and avenues for the treatment of tumors with class I-mediated ICB resistance.
- 일반주제명
- Immunology.
- 일반주제명
- Oncology.
- 일반주제명
- Bioinformatics.
- 일반주제명
- Pharmacology.
- 키워드
- Melanoma
- 키워드
- Cancer types
- 기타저자
- University of California, Los Angeles Molecular and Medical Pharmacology 0639
- 기본자료저록
- Dissertations Abstracts International. 85-04B.
- 기본자료저록
- Dissertation Abstract International
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520240214101915
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■007cr#unu||||||||
■020 ▼a9798380603935
■035 ▼a(MiAaPQ)AAI30687927
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a616.079
■1001 ▼aGalvez, Mildred.
■24510▼aImpact of Class I Antigen Presentation Alterations in Melanoma▼h[electronic resource]
■260 ▼a[S.l.]:▼bUniversity of California, Los Angeles. ▼c2023
■260 1▼aAnn Arbor :▼bProQuest Dissertations & Theses, ▼c2023
■300 ▼a1 online resource(141 p.)
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-04, Section: B.
■500 ▼aIncludes supplementary digital materials.
■500 ▼aAdvisor: Ribas, Antoni.
■5021 ▼aThesis (Ph.D.)--University of California, Los Angeles, 2023.
■506 ▼aThis item must not be sold to any third party vendors.
■520 ▼aImmune checkpoint blockade (ICB) targeting programmed cell death-1 (PD-1) has led to prolonged clinical responses among several patients with melanoma and other cancer types. ICB response relies on effective immune recognition and elimination of tumor cells. This depends on the successful presentation of tumor-specific antigens on surface major histocompatibility complex (MHC) class I molecules by tumor cells to the T-cell receptor of cytotoxic CD8+ T cells. Currently, both primary and acquired mechanisms of resistance remain significant barriers to expanding the therapeutic benefits of anti-PD-1 treatment. Several studies have stressed the critical role of antigen processing machinery (APM) defects in mediating resistance to ICB therapies. More specifically, aberrations of the β-2-microglobulin (B2M) gene, which encodes a critical component of the MHC class I molecule, were found to be enriched in patients with melanoma who progressed during therapy. Nevertheless, there are cases of patients with B2M-deficient tumors that respond to ICB, but the exact mechanism mediating this response is currently unknown. Presently, the exact effect of MHC class I APM alterations on anti-PD-1 therapy response requires further characterization and the cells mediating the anti-tumorigenic effects of PD-1 blockade in B2M-defective tumors have not been fully elucidated. In this work, we aim to holistically characterize alterations in components involved in class I antigen processing, presentation, and regulation in melanoma tumors, as well as to elucidate the main cell mediators of class I-deficient tumor removal in patient-derived biopsies and mouse models. Using a clinical dataset of patients with melanoma treated with ICB, whole-exome sequencing and bulk RNA-sequencing data from baseline tumor samples were analyzed to identify somatic class I APM alterations and evaluate correlative clinical outcomes, infiltrating immune cells, and gene expression patterns. Additionally, human melanoma cell lines and B2M-null mouse tumor models were utilized to validate these findings and further explore the impact of B2M and MHC class I defects on tumor intrinsic and extrinsic factors. Collectively, our findings may help offer alternative therapeutic targets and avenues for the treatment of tumors with class I-mediated ICB resistance.
■590 ▼aSchool code: 0031.
■650 4▼aImmunology.
■650 4▼aOncology.
■650 4▼aBioinformatics.
■650 4▼aPharmacology.
■653 ▼aMelanoma
■653 ▼aImmune checkpoint blockade
■653 ▼aCancer types
■653 ▼aAnti-tumorigenic effects
■653 ▼aGene expression patterns
■690 ▼a0982
■690 ▼a0992
■690 ▼a0715
■690 ▼a0419
■71020▼aUniversity of California, Los Angeles▼bMolecular and Medical Pharmacology 0639.
■7730 ▼tDissertations Abstracts International▼g85-04B.
■773 ▼tDissertation Abstract International
■790 ▼a0031
■791 ▼aPh.D.
■792 ▼a2023
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16935293▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
■980 ▼a202402▼f2024
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