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Remote Loading of Autoantigens in PLGA Nanoparticles for the Treatment of Autoimmune Diseases
Remote Loading of Autoantigens in PLGA Nanoparticles for the Treatment of Autoimmune Disea...
Remote Loading of Autoantigens in PLGA Nanoparticles for the Treatment of Autoimmune Diseases

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자료유형  
 학위논문 서양
최종처리일시  
20260202105216
ISBN  
9798291565810
DDC  
615
저자명  
Din, Corrine.
서명/저자  
Remote Loading of Autoantigens in PLGA Nanoparticles for the Treatment of Autoimmune Diseases
발행사항  
[Sl] : University of Michigan, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
103 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
주기사항  
Advisor: Schwendeman, Steven P.
학위논문주기  
Thesis (Ph.D.)--University of Michigan, 2025.
초록/해제  
요약Autoimmune diseases affect millions of people worldwide and have been growing in prevalence. Current therapeutic strategies either entirely suppress immune function or only offer modest efficacy. Research efforts have shifted focus more recently to antigen-specific therapies in order to promote immune system tolerance and avoid compromising general immune function. Here, we tested the hypothesis that a novel aqueous remote loading method could be applied to the encapsulation of peptide autoantigens in poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NPs) with the following features: 1) high loading and encapsulation efficiency of a model autoantigen, 2) long-term continuous release kinetics of autoantigen from NPs after a low initial burst release, 3) strong efficacy in autoimmune disease, and 4) generalizability for loading multiple unrelated autoantigens. To test this hypothesis, we first formulated blank NPs of a size suitable for targeting antigen-presenting cells and remote loaded a model autoantigen, MOG38-50, as a target of autoreactive T cells in MS. These NPs (750 ± 200 nm and-16.7 ± 0.4 mV zeta potential) encapsulated MOG38-50 peptide at high loading (8.2 ± 0.7%) and efficiency (82%) and slowly and continuously released peptide for 56 days after a low initial burst release of less than 2%. NPs could also be made with differing lactic-glycolic acid ratios at similar loading and efficiency and continuous in vitro release varied as expected by the changing hydrolysis rates of the starting PLGA material. MOG loaded PLGA NPs (MOG-PLGA NPs) demonstrated decreased costimulatory molecule expression on dendritic cells in vitro. In a murine experimental autoimmune encephalomyelitis model of MS, MOG-PLGA NPs displayed strong efficacy with a single dose administered either subcutaneously or intravenously and at both high and low doses of MOG peptide. Disease progression and reversal of disease symptoms were observed when mice were treated either prophylactically or therapeutically with MOG-PLGA NPs. Additionally, histopathological analysis demonstrated a positive correlation between % demyelination and EAE score observed. The NPs also induced long term tolerance in mice that were rechallenged. Finally, a single injection of MOG-PLGA NPs showed a 2-fold increase in expression of MOG specific Tregs and anergic T cells in mice that were treated intravenously compared to mice that received PBS or free MOG peptide. Hence, cationic autoantigen peptides such as MOG38-50 can be remote loaded into PLGA NPs from aqueous solution at high loading and encapsulation efficiency for long-term controlled release. The application of this technology is promising for prophylactic and therapeutic induction of antigen-specific immune tolerance in MS. In addition to MOG38-50, other autoantigen peptides were encapsulated in PLGA nanoparticles with little or no modifications to remote loading methods. NRPA7 for type 1 diabetes (T1D), CII250-270 for rheumatoid arthritis (RA), and pCons for systemic lupus erythematosus (SLE) were all remote loaded into blank PLGA nanoparticles at high loading and encapsulation efficiency. NRPA7-PLGA nanoparticles also showed slow and controlled release capabilities over 77 days which is promising for use in antigen-specific T1D immunomodulation. Formulation of these additional peptides loaded in PLGA nanoparticles builds the foundation for further work to evaluate these other remote loaded autoantigens in vitro for immune cell interactions and in animal models of T1D, RA, and SLE.
일반주제명  
Pharmaceutical sciences
일반주제명  
Pharmacology
일반주제명  
Nanotechnology
일반주제명  
Immunology
키워드  
Poly(lactic-co-glycolic acid) nanoparticles
키워드  
Remote loading
키워드  
Controlled release formulation
키워드  
Autoimmune diseases
키워드  
Multiple sclerosis
키워드  
Experimental autoimmune encephalomyelitis
기타저자  
University of Michigan Pharmaceutical Sciences
기본자료저록  
Dissertations Abstracts International. 87-03B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aDin,  Corrine.
■24510▼aRemote  Loading  of  Autoantigens  in  PLGA  Nanoparticles  for  the  Treatment  of  Autoimmune  Diseases
■260    ▼a[Sl]▼bUniversity  of  Michigan▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a103  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-03,  Section:  B.
■500    ▼aAdvisor:  Schwendeman,  Steven  P.
■5021  ▼aThesis  (Ph.D.)--University  of  Michigan,  2025.
■520    ▼aAutoimmune  diseases  affect  millions  of  people  worldwide  and  have  been  growing  in  prevalence.  Current  therapeutic  strategies  either  entirely  suppress  immune  function  or  only  offer  modest  efficacy.  Research  efforts  have  shifted  focus  more  recently  to  antigen-specific  therapies  in  order  to  promote  immune  system  tolerance  and  avoid  compromising  general  immune  function.  Here,  we  tested  the  hypothesis  that  a  novel  aqueous  remote  loading  method  could  be  applied  to  the  encapsulation  of  peptide  autoantigens  in  poly(lactic-co-glycolic  acid)  (PLGA)  nanoparticles  (NPs)  with  the  following  features:  1)  high  loading  and  encapsulation  efficiency  of  a  model  autoantigen,  2)  long-term  continuous  release  kinetics  of  autoantigen  from  NPs  after  a  low  initial  burst  release,  3)  strong  efficacy  in  autoimmune  disease,  and  4)  generalizability  for  loading  multiple  unrelated  autoantigens.  To  test  this  hypothesis,  we  first  formulated  blank  NPs  of  a  size  suitable  for  targeting  antigen-presenting  cells  and  remote  loaded  a  model  autoantigen,  MOG38-50,  as  a  target  of  autoreactive  T  cells  in  MS.  These  NPs  (750  ±  200  nm  and-16.7  ±  0.4  mV  zeta  potential)  encapsulated  MOG38-50  peptide  at  high  loading  (8.2  ±  0.7%)  and  efficiency  (82%)  and  slowly  and  continuously  released  peptide  for  56  days  after  a  low  initial  burst  release  of  less  than  2%.  NPs  could  also  be  made  with  differing  lactic-glycolic  acid  ratios  at  similar  loading  and  efficiency  and  continuous  in  vitro  release  varied  as  expected  by  the  changing  hydrolysis  rates  of  the  starting  PLGA  material.  MOG  loaded  PLGA  NPs  (MOG-PLGA  NPs)  demonstrated  decreased  costimulatory  molecule  expression  on  dendritic  cells  in  vitro.  In  a  murine  experimental  autoimmune  encephalomyelitis  model  of  MS,  MOG-PLGA  NPs  displayed  strong  efficacy  with  a  single  dose  administered  either  subcutaneously  or  intravenously  and  at  both  high  and  low  doses  of  MOG  peptide.  Disease  progression  and  reversal  of  disease  symptoms  were  observed  when  mice  were  treated  either  prophylactically  or  therapeutically  with  MOG-PLGA  NPs.  Additionally,  histopathological  analysis  demonstrated  a  positive  correlation  between  %  demyelination  and  EAE  score  observed.  The  NPs  also  induced  long  term  tolerance  in  mice  that  were  rechallenged.  Finally,  a  single  injection  of  MOG-PLGA  NPs  showed  a  2-fold  increase  in  expression  of  MOG  specific  Tregs  and  anergic  T  cells  in  mice  that  were  treated  intravenously  compared  to  mice  that  received  PBS  or  free  MOG  peptide.  Hence,  cationic  autoantigen  peptides  such  as  MOG38-50  can  be  remote  loaded  into  PLGA  NPs  from  aqueous  solution  at  high  loading  and  encapsulation  efficiency  for  long-term  controlled  release.  The  application  of  this  technology  is  promising  for  prophylactic  and  therapeutic  induction  of  antigen-specific  immune  tolerance  in  MS.  In  addition  to  MOG38-50,  other  autoantigen  peptides  were  encapsulated  in  PLGA  nanoparticles  with  little  or  no  modifications  to  remote  loading  methods.  NRPA7  for  type  1  diabetes  (T1D),  CII250-270  for  rheumatoid  arthritis  (RA),  and  pCons  for  systemic  lupus  erythematosus  (SLE)  were  all  remote  loaded  into  blank  PLGA  nanoparticles  at  high  loading  and  encapsulation  efficiency.  NRPA7-PLGA  nanoparticles  also  showed  slow  and  controlled  release  capabilities  over  77  days  which  is  promising  for  use  in  antigen-specific  T1D  immunomodulation.  Formulation  of  these  additional  peptides  loaded  in  PLGA  nanoparticles  builds  the  foundation  for  further  work  to  evaluate  these  other  remote  loaded  autoantigens  in  vitro  for  immune  cell  interactions  and  in  animal  models  of  T1D,  RA,  and  SLE.
■590    ▼aSchool  code:  0127.
■650  4▼aPharmaceutical  sciences
■650  4▼aPharmacology
■650  4▼aNanotechnology
■650  4▼aImmunology
■653    ▼aPoly(lactic-co-glycolic  acid)  nanoparticles
■653    ▼aRemote  loading
■653    ▼aControlled  release  formulation
■653    ▼aAutoimmune  diseases
■653    ▼aMultiple  sclerosis
■653    ▼aExperimental  autoimmune  encephalomyelitis
■690    ▼a0572
■690    ▼a0652
■690    ▼a0982
■690    ▼a0419
■71020▼aUniversity  of  Michigan▼bPharmaceutical  Sciences.
■7730  ▼tDissertations  Abstracts  International▼g87-03B.
■790    ▼a0127
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359801▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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