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Myelin-Reactive CD8+ T Cells Influence Conventional Dendritic Cell Subsets Towards a Mature and Regulatory Phenotype in Experimental Autoimmune Encephalomyelitis
Myelin-Reactive CD8+ T Cells Influence Conventional Dendritic Cell Subsets Towards a Matur...
Myelin-Reactive CD8+ T Cells Influence Conventional Dendritic Cell Subsets Towards a Mature and Regulatory Phenotype in Experimental Autoimmune Encephalomyelitis

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202103201
ISBN  
9798286435296
DDC  
616.07
저자명  
Upadhye, Mohit A.
서명/저자  
Myelin-Reactive CD8+ T Cells Influence Conventional Dendritic Cell Subsets Towards a Mature and Regulatory Phenotype in Experimental Autoimmune Encephalomyelitis
발행사항  
[Sl] : The University of Iowa, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
188 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
주기사항  
Advisor: Karandikar, Nitin J.;Harty, John.
학위논문주기  
Thesis (Ph.D.)--The University of Iowa, 2025.
초록/해제  
요약Multiple sclerosis (MS), an autoimmune demyelinating disease of the central nervous system, is modeled in mice as experimental autoimmune encephalomyelitis (EAE). While CD4+ T cells, primarily Th1 and Th17 subsets, drive disease pathogenesis, the exact function of CD8+ T cells remains unclear. We previously demonstrated that adoptively transferred myelin-reactive CD8+ T cells (PLP-CD8) prevent EAE induction and suppress ongoing disease by engaging MHC Class-I in recipient mice. In my dissertation, I show that PLP-CD8 induce regulatory changes in both subsets of conventional dendritic cells (cDC1 and cDC2) in the spleens of the recipient mice in vivo and in vitro. Adoptively transferred PLP-CD8 promoted both cDC subsets to upregulate costimulatory and regulatory markers reflecting a mature and regulatory phenotype with an anti-inflammatory cytokine profile and a reduced capacity to support CD4+ T cell proliferation. In vitro, PLP-CD8 induced similar phenotypic changes in both cDC subsets in an antigen-specific, dose-dependent manner. PLP-CD8 directly interacted with cDC1 and indirectly influenced cDC2 through paracrine signaling. Notably, direct interaction with PLP-CD8 had detrimental effects on cDC2. However, the supernatant from this direct interaction did not cause similar changes in cDC2 and rather promoted a mature, regulatory profile reinforcing a contact-dependent negative effect of PLP-CD8 on cDC2. Single-cell RNA sequencing revealed upregulation of key immunoregulatory genes, such as Cd274 (PD-L1), Cd83, Mtor, Tgfb1 (TGF-β1) and Foxo3 with enrichment of immunoregulatory KEGG pathways predominantly in cDC2 but also in the cDC1 subset influenced by PLP-CD8. Our study highlights a novel mechanism in which myelin-reactive CD8+ T cells directly interact with cDC1 and modulate cDC2 through paracrine mechanisms to induce mature, regulatory dendritic cells, which leads to inhibited CD4+ T cell responses and reduced EAE pathogenesis.
일반주제명  
Pathology
일반주제명  
Immunology
일반주제명  
Cellular biology
일반주제명  
Molecular biology
키워드  
Autoimmunity
키워드  
Autoregulation
키워드  
CD8+ T cells
키워드  
Dendritic cells
키워드  
Experimental autoimmune encephalomyelitis
키워드  
Multiple sclerosis
기타저자  
The University of Iowa Pathology
기본자료저록  
Dissertations Abstracts International. 86-12B.
전자적 위치 및 접속  
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MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a616.07
■1001  ▼aUpadhye,  Mohit  A.
■24510▼aMyelin-Reactive  CD8+  T  Cells  Influence  Conventional  Dendritic  Cell  Subsets  Towards  a  Mature  and  Regulatory  Phenotype  in  Experimental  Autoimmune  Encephalomyelitis
■260    ▼a[Sl]▼bThe  University  of  Iowa▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a188  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-12,  Section:  B.
■500    ▼aAdvisor:  Karandikar,  Nitin  J.;Harty,  John.
■5021  ▼aThesis  (Ph.D.)--The  University  of  Iowa,  2025.
■520    ▼aMultiple  sclerosis  (MS),  an  autoimmune  demyelinating  disease  of  the  central  nervous  system,  is  modeled  in  mice  as  experimental  autoimmune  encephalomyelitis  (EAE).  While  CD4+  T  cells,  primarily  Th1  and  Th17  subsets,  drive  disease  pathogenesis,  the  exact  function  of  CD8+  T  cells  remains  unclear.  We  previously  demonstrated  that  adoptively  transferred  myelin-reactive  CD8+  T  cells  (PLP-CD8)  prevent  EAE  induction  and  suppress  ongoing  disease  by  engaging  MHC  Class-I  in  recipient  mice.  In  my  dissertation,  I  show  that  PLP-CD8  induce  regulatory  changes  in  both  subsets  of  conventional  dendritic  cells  (cDC1  and  cDC2)  in  the  spleens  of  the  recipient  mice  in  vivo  and  in  vitro.  Adoptively  transferred  PLP-CD8  promoted  both  cDC  subsets  to  upregulate  costimulatory  and  regulatory  markers  reflecting  a  mature  and  regulatory  phenotype  with  an  anti-inflammatory  cytokine  profile  and  a  reduced  capacity  to  support  CD4+  T  cell  proliferation.  In  vitro,  PLP-CD8  induced  similar  phenotypic  changes  in  both  cDC  subsets  in  an  antigen-specific,  dose-dependent  manner.  PLP-CD8  directly  interacted  with  cDC1  and  indirectly  influenced  cDC2  through  paracrine  signaling.  Notably,  direct  interaction  with  PLP-CD8  had  detrimental  effects  on  cDC2.  However,  the  supernatant  from  this  direct  interaction  did  not  cause  similar  changes  in  cDC2  and  rather  promoted  a  mature,  regulatory  profile  reinforcing  a  contact-dependent  negative  effect  of  PLP-CD8  on  cDC2.  Single-cell  RNA  sequencing  revealed  upregulation  of  key  immunoregulatory  genes,  such  as  Cd274  (PD-L1),  Cd83,  Mtor,  Tgfb1  (TGF-β1)  and  Foxo3  with  enrichment  of  immunoregulatory  KEGG  pathways  predominantly  in  cDC2  but  also  in  the  cDC1  subset  influenced  by  PLP-CD8.  Our  study  highlights  a  novel  mechanism  in  which  myelin-reactive  CD8+  T  cells  directly  interact  with  cDC1  and  modulate  cDC2  through  paracrine  mechanisms  to  induce  mature,  regulatory  dendritic  cells,  which  leads  to  inhibited  CD4+  T  cell  responses  and  reduced  EAE  pathogenesis.
■590    ▼aSchool  code:  0096.
■650  4▼aPathology
■650  4▼aImmunology
■650  4▼aCellular  biology
■650  4▼aMolecular  biology
■653    ▼aAutoimmunity
■653    ▼aAutoregulation
■653    ▼aCD8+  T  cells
■653    ▼aDendritic  cells
■653    ▼aExperimental  autoimmune  encephalomyelitis
■653    ▼aMultiple  sclerosis
■690    ▼a0571
■690    ▼a0982
■690    ▼a0379
■690    ▼a0307
■71020▼aThe  University  of  Iowa▼bPathology.
■7730  ▼tDissertations  Abstracts  International▼g86-12B.
■790    ▼a0096
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357283▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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