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Structural Insights into an Immune Checkpoint Receptor Reveal a Novel Approach to Cancer Immunotherapy
Structural Insights into an Immune Checkpoint Receptor Reveal a Novel Approach to Cancer I...
Structural Insights into an Immune Checkpoint Receptor Reveal a Novel Approach to Cancer Immunotherapy

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105827
ISBN  
9798265428448
DDC  
616.079
저자명  
Silberstein, John Louis.
서명/저자  
Structural Insights into an Immune Checkpoint Receptor Reveal a Novel Approach to Cancer Immunotherapy
발행사항  
[Sl] : Stanford University, 2023
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2023
형태사항  
114 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Cochran, Jennifer.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2023.
초록/해제  
요약Immunotherapy has revolutionized cancer treatment, but the limited response rates to current checkpoint inhibitors necessitate the identification of additional immunotherapeutic approaches. Lymphocyte-activation gene 3 (LAG-3) has emerged as a potential orthogonal checkpoint molecule that negatively regulates T cell activation. First-generation monoclonal antibodies against LAG-3 demonstrated moderate success, despite a lack of knowledge about the mechanism by which LAG-3 functions. This thesis aims to provide key details focused on LAG3 structural characterization, including functional consequences of LAG-3 dimerization on ligand binding and activation, as well as epitope mapping of murine and clinical human LAG-3 antibodies.The first major accomplishment of this work was the elucidation of the crystal structure of the glycosylated mouse LAG-3 extracellular domain, providing valuable insights into its overall architecture and molecular features. This structural information, which was generated in collaboration with Irimpan Mathews at SLAC, served as a foundation for further investigations into the functional aspects of LAG-3. By employing sophisticated biochemical and biophysical techniques in collaborative work with the laboratories of Jun Wang and Xiang-Peng Kong at NYU, we demonstrated that disruption of D2 domain dimerization severely compromised LAG-3's ability to engage with its ligands and modulate T-cell responses. To further explore the potential therapeutic implications of disrupting LAG-3 dimerization, we performed fine epitope mapping of an antibody called C9B7W, known to bind the LAG-3 D2 domain that we identified as being key to LAG-3 dimerization. The study pinpointed the binding site of C9B7W squarely at the D2 dimerization interface, suggesting a potential mechanism by which this antibody disrupts LAG-3 function. Epitope mapping and electron microscopy showed that like C9B7W, murine antibodies which bind LAG-3 D1 and D3 can also disrupt dimerization and ligand binding.Lastly, we undertook a comprehensive epitope mapping analysis of 11 currently known human LAG-3 antibodies under clinical development. Intriguingly, unlike C9B7W, none of the LAG-3 antibodies under clinical development bound to the D2 dimerization interface, and all bound to the LAG-3 D1 domain, some with overlapping and others with disparate epitopes. Collectively, these findings significantly contribute to our understanding of LAG-3 biology and provide crucial insights into its therapeutic potential. The structural characterization, identification of the critical role of D2 dimerization, and epitope mapping of disruptive and clinical human LAG-3 antibodies pave the way for the development of novel immunotherapeutic strategies targeting LAG-3 in the fight against cancer and other immune-related diseases.
일반주제명  
Immune checkpoint inhibitors
일반주제명  
T cell receptors
일반주제명  
Homeostasis
일반주제명  
Glycoproteins
일반주제명  
Immunotherapy
일반주제명  
Disease
일반주제명  
Cancer therapies
일반주제명  
Immune system
일반주제명  
Lymphocytes
일반주제명  
Clinical trials
일반주제명  
Antigens
일반주제명  
Yeast
일반주제명  
Viral infections
일반주제명  
Genotype & phenotype
일반주제명  
Cell growth
일반주제명  
Genome editing
일반주제명  
Clinical outcomes
일반주제명  
Parkinson's disease
일반주제명  
Cellular biology
일반주제명  
Genetics
일반주제명  
Immunology
일반주제명  
Neurosciences
일반주제명  
Oncology
일반주제명  
Pharmaceutical sciences
일반주제명  
Physiology
일반주제명  
Virology
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
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MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a616.079
■1001  ▼aSilberstein,  John  Louis.
■24510▼aStructural  Insights  into  an  Immune  Checkpoint  Receptor  Reveal  a  Novel  Approach  to  Cancer  Immunotherapy
■260    ▼a[Sl]▼bStanford  University▼c2023
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2023
■300    ▼a114  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Cochran,  Jennifer.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2023.
■520    ▼aImmunotherapy  has  revolutionized  cancer  treatment,  but  the  limited  response  rates  to  current  checkpoint  inhibitors  necessitate  the  identification  of  additional  immunotherapeutic  approaches.  Lymphocyte-activation  gene  3  (LAG-3)  has  emerged  as  a  potential  orthogonal  checkpoint  molecule  that  negatively  regulates  T  cell  activation.  First-generation  monoclonal  antibodies  against  LAG-3  demonstrated  moderate  success,  despite  a  lack  of  knowledge  about  the  mechanism  by  which  LAG-3  functions.  This  thesis  aims  to  provide  key  details  focused  on  LAG3  structural  characterization,  including  functional  consequences  of  LAG-3  dimerization  on  ligand  binding  and  activation,  as  well  as  epitope  mapping  of  murine  and  clinical  human  LAG-3  antibodies.The  first  major  accomplishment  of  this  work  was  the  elucidation  of  the  crystal  structure  of  the  glycosylated  mouse  LAG-3  extracellular  domain,  providing  valuable  insights  into  its  overall  architecture  and  molecular  features.  This  structural  information,  which  was  generated  in  collaboration  with  Irimpan  Mathews  at  SLAC,  served  as  a  foundation  for  further  investigations  into  the  functional  aspects  of  LAG-3.  By  employing  sophisticated  biochemical  and  biophysical  techniques  in  collaborative  work  with  the  laboratories  of  Jun  Wang  and  Xiang-Peng  Kong  at  NYU,  we  demonstrated  that  disruption  of  D2  domain  dimerization  severely  compromised  LAG-3's  ability  to  engage  with  its  ligands  and  modulate  T-cell  responses.  To  further  explore  the  potential  therapeutic  implications  of  disrupting  LAG-3  dimerization,  we  performed  fine  epitope  mapping  of  an  antibody  called  C9B7W,  known  to  bind  the  LAG-3  D2  domain  that  we  identified  as  being  key  to  LAG-3  dimerization.  The  study  pinpointed  the  binding  site  of  C9B7W  squarely  at  the  D2  dimerization  interface,  suggesting  a  potential  mechanism  by  which  this  antibody  disrupts  LAG-3  function.  Epitope  mapping  and  electron  microscopy  showed  that  like  C9B7W,  murine  antibodies  which  bind  LAG-3  D1  and  D3  can  also  disrupt  dimerization  and  ligand  binding.Lastly,  we  undertook  a  comprehensive  epitope  mapping  analysis  of  11  currently  known  human  LAG-3  antibodies  under  clinical  development.  Intriguingly,  unlike  C9B7W,  none  of  the  LAG-3  antibodies  under  clinical  development  bound  to  the  D2  dimerization  interface,  and  all  bound  to  the  LAG-3  D1  domain,  some  with  overlapping  and  others  with  disparate  epitopes.  Collectively,  these  findings  significantly  contribute  to  our  understanding  of  LAG-3  biology  and  provide  crucial  insights  into  its  therapeutic  potential.  The  structural  characterization,  identification  of  the  critical  role  of  D2  dimerization,  and  epitope  mapping  of  disruptive  and  clinical  human  LAG-3  antibodies  pave  the  way  for  the  development  of  novel  immunotherapeutic  strategies  targeting  LAG-3  in  the  fight  against  cancer  and  other  immune-related  diseases.
■590    ▼aSchool  code:  0212.
■650  4▼aImmune  checkpoint  inhibitors
■650  4▼aT  cell  receptors
■650  4▼aHomeostasis
■650  4▼aGlycoproteins
■650  4▼aImmunotherapy
■650  4▼aDisease
■650  4▼aCancer  therapies
■650  4▼aImmune  system
■650  4▼aLymphocytes
■650  4▼aClinical  trials
■650  4▼aAntigens
■650  4▼aYeast
■650  4▼aViral  infections
■650  4▼aGenotype  &  phenotype
■650  4▼aCell  growth
■650  4▼aGenome  editing
■650  4▼aClinical  outcomes
■650  4▼aParkinson's  disease
■650  4▼aCellular  biology
■650  4▼aGenetics
■650  4▼aImmunology
■650  4▼aNeurosciences
■650  4▼aOncology
■650  4▼aPharmaceutical  sciences
■650  4▼aPhysiology
■650  4▼aVirology
■690    ▼a0379
■690    ▼a0369
■690    ▼a0982
■690    ▼a0317
■690    ▼a0992
■690    ▼a0572
■690    ▼a0719
■690    ▼a0720
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17361292▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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