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Immunoregulatory roles of CD48 in autoimmunity and tolerance- [electronic resource]
Immunoregulatory roles of CD48 in autoimmunity and tolerance - [electronic resource] / McA...
Immunoregulatory roles of CD48 in autoimmunity and tolerance- [electronic resource]

상세정보

자료유형  
 학위논문(국외)
자관 청구기호  
기본표목-개인명  
표제와 책임표시사항  
Immunoregulatory roles of CD48 in autoimmunity and tolerance - [electronic resource] / McArdel, Shannon Leah.
발행, 배포, 간사 사항  
[Sl] : Harvard University , 2015
    형태사항  
    1 online resource(190 p)
    일반주기  
    Source: Dissertation Abstracts International, Volume: 77-04(E), Section: B.
    학위논문주기  
    Thesis (Ph.D.)--Harvard University, 2015.
    이용제한주기  
    This item is not available from ProQuest Dissertations & Theses.
    요약 등 주기  
    요약CD48 is an adhesion and costimulatory molecule expressed constitutively on nearly all hematopoietic cells. Via interactions with its ligand CD2, it contributes to synapse organization between T cells and APCs, and can enhance TCR signaling; via interactions with its higher affinity ligand CD244, CD48 mediates interactions with T cells and NK cells. In addition to its roles in T cell activation and NK-mediated lysis, CD48 deficiency is associated with development of spontaneous lupus-like disease on a mixed 129 and B6 genetic background, but not on a mixed 129 and Balb/c background. Despite these cellular and clinical observations, the mechanisms by which CD48 might contribute to autoimmunity and tolerance in vivo were not well defined. In this thesis we examined the immunoregulatory roles of CD48 in spontaneous and induced models of autoimmune disease, using CD48 deficient mouse strains and anti-CD48 antibodies. We found that CD48 deficiency did not precipitate spontaneous lupus-like disease in mice on a pure B6 background, but resulted in a spontaneous increase in lymphocyte activation within both young and aged mice. This implicated neighboring immunoreceptor genes in development of lupus-like disease. CD48 deficient mice had modestly attenuated disease in a mouse model of multiple sclerosis, experimental autoimmune encephalomyelitis (EAE), including reduced severity and accelerated resolution. At the peak of disease, CNS-infiltrating CD4+ T cells in CD48 deficient mice produced less GM-CSF, a cytokine that contributes to encephalitogenicity of T cells in EAE. When we examined CD48 expression in wild type mice during EAE, we found that CD48 expression was increased on activated CD4+ T cells, and that CD48++ CD4+ T cells were enriched for GM-CSF, IL-17A and IFN?-producing cells. Administration of anti-CD48 antibody during EAE in wild type mice dramatically reduced the number of these cytokine-producing cells, and could significantly attenuate or even prevent disease. Anti-CD48-mediated attenuation of EAE was partially dependent on Fc receptors, suggesting a mechanism of depletion of activated CD48++ CD4+ T effectors. Collectively, our data support a critical role for CD48 in regulating the generation of activated lymphocytes and suggest that CD48 may be used to identify pathogenic self-reactive T cells in autoimmune disease.
    주제명부출표목-일반주제명  
    부출표목-단체명  
    Harvard University Medical Sciences
      기본자료저록  
      Dissertation Abstracts International. 77-04B(E).
      기본자료저록  
      Dissertation Abstract International
      전자적 위치 및 접속  
       원문정보보기
      소장사항  
      20170404 2017

      MARC

       008170601s2015        us          esm        001c    eng
      ■001MOKWON01255853
      ■00520170418121728
      ■007cr
      ■020    ▼a9781339295343
      ■035    ▼a(MiAaPQ)AAI3738996
      ■040    ▼aMiAaPQ▼cMiAaPQ
      ■090    ▼a전자도서(박사논문)
      ■1001  ▼aMcArdel,  Shannon  Leah.
      ■24510▼aImmunoregulatory  roles  of  CD48  in  autoimmunity  and  tolerance▼h[electronic  resource]▼cMcArdel,  Shannon  Leah.
      ■260    ▼a[Sl]▼bHarvard  University▼c2015
      ■300    ▼a1  online  resource(190  p)
      ■500    ▼aSource:  Dissertation  Abstracts  International,  Volume:  77-04(E),  Section:  B.
      ■5021  ▼aThesis  (Ph.D.)--Harvard  University,  2015.
      ■506    ▼aThis  item  is  not  available  from  ProQuest  Dissertations  &  Theses.
      ■520    ▼aCD48  is  an  adhesion  and  costimulatory  molecule  expressed  constitutively  on  nearly  all  hematopoietic  cells.  Via  interactions  with  its  ligand  CD2,  it  contributes  to  synapse  organization  between  T  cells  and  APCs,  and  can  enhance  TCR  signaling;  via  interactions  with  its  higher  affinity  ligand  CD244,  CD48  mediates  interactions  with  T  cells  and  NK  cells.  In  addition  to  its  roles  in  T  cell  activation  and  NK-mediated  lysis,  CD48  deficiency  is  associated  with  development  of  spontaneous  lupus-like  disease  on  a  mixed  129  and  B6  genetic  background,  but  not  on  a  mixed  129  and  Balb/c  background.  Despite  these  cellular  and  clinical  observations,  the  mechanisms  by  which  CD48  might  contribute  to  autoimmunity  and  tolerance  in  vivo  were  not  well  defined.  In  this  thesis  we  examined  the  immunoregulatory  roles  of  CD48  in  spontaneous  and  induced  models  of  autoimmune  disease,  using  CD48  deficient  mouse  strains  and  anti-CD48  antibodies.  We  found  that  CD48  deficiency  did  not  precipitate  spontaneous  lupus-like  disease  in  mice  on  a  pure  B6  background,  but  resulted  in  a  spontaneous  increase  in  lymphocyte  activation  within  both  young  and  aged  mice.  This  implicated  neighboring  immunoreceptor  genes  in  development  of  lupus-like  disease.  CD48  deficient  mice  had  modestly  attenuated  disease  in  a  mouse  model  of  multiple  sclerosis,  experimental  autoimmune  encephalomyelitis  (EAE),  including  reduced  severity  and  accelerated  resolution.  At  the  peak  of  disease,  CNS-infiltrating  CD4+  T  cells  in  CD48  deficient  mice  produced  less  GM-CSF,  a  cytokine  that  contributes  to  encephalitogenicity  of  T  cells  in  EAE.  When  we  examined  CD48  expression  in  wild  type  mice  during  EAE,  we  found  that  CD48  expression  was  increased  on  activated  CD4+  T  cells,  and  that  CD48++  CD4+  T  cells  were  enriched  for  GM-CSF,  IL-17A  and  IFN?-producing  cells.  Administration  of  anti-CD48  antibody  during  EAE  in  wild  type  mice  dramatically  reduced  the  number  of  these  cytokine-producing  cells,  and  could  significantly  attenuate  or  even  prevent  disease.  Anti-CD48-mediated  attenuation  of  EAE  was  partially  dependent  on  Fc  receptors,  suggesting  a  mechanism  of  depletion  of  activated  CD48++  CD4+  T  effectors.  Collectively,  our  data  support  a  critical  role  for  CD48  in  regulating  the  generation  of  activated  lymphocytes  and  suggest  that  CD48  may  be  used  to  identify  pathogenic  self-reactive  T  cells  in  autoimmune  disease.
      ■590    ▼aSchool  code:  0084.
      ■650  4▼aImmunology
      ■690    ▼a0982
      ■71020▼aHarvard  University▼bMedical  Sciences.
      ■7730  ▼tDissertation  Abstracts  International▼g77-04B(E).
      ■773    ▼tDissertation  Abstract  International
      ■790    ▼a0084
      ■791    ▼aPh.D.
      ■792    ▼a2015
      ■793    ▼aEnglish
      ■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T14491656▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
      ■980    ▼a20170404▼f2017

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