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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 Diseases
상세정보
- 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
- Remote loading
- 기타저자
- University of Michigan Pharmaceutical Sciences
- 기본자료저록
- Dissertations Abstracts International. 87-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798291565810
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■035 ▼a(MiAaPQ)umichrackham006267
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a615
■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.


