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Branches and Biguanides for Breaching Biological Barriers: The Design, Synthesis, and Evaluation of Novel Cationic Amphiphiles for the Delivery of Nucleic Acids and Antibiotics.
Branches and Biguanides for Breaching Biological Barriers: The Design, Synthesis, and Evaluation of Novel Cationic Amphiphiles for the Delivery of Nucleic Acids and Antibiotics.
상세정보
- 자료유형
- 학위논문(국외)
- 기본표목-개인명
- 표제와 책임표시사항
- Branches and Biguanides for Breaching Biological Barriers: The Design, Synthesis, and Evaluation of Novel Cationic Amphiphiles for the Delivery of Nucleic Acids and Antibiotics.
- 발행, 배포, 간사 사항
- 발행, 배포, 간사 사항
- 형태사항
- 429 p.
- 일반주기
- Source: Dissertations Abstracts International, Volume: 87-01, Section: B.
- 일반주기
- Advisor: Wender, Paul.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2024.
- 요약 등 주기
- 요약The delivery of therapeutics to their intended targets represents an omnipresent challenge for clinical advancements. Whether the drug is a small molecule or a polymer, its successful delivery across biological barriers will influence its final impact on the landscape of medicine and its impact on human health. Antibiotics and nucleic acids are in particular need of assistance due to the many biological and physical mechanisms that impede their efficacy. Antibiotics must penetrate the pathogen's thick membranes and extracellular matrices while nucleic acids must evade nucleases and enter the target cell's cytosol against an electrostatic potential. For these potentially lifesaving technologies to engage with their intended mode of action, they sometimes require the assistance of a transporter.Chapter 1 introduces these biological barriers and methods to breach them in greater detail before I describe in Chapter 2 the synthesis and characterization of dendrimeric technologies we originally developed to deliver mRNA but later exapted and elaborated upon for the treatment of ESKAPE pathogens through conjugation to vancomycin. These transporters explore a long standing question in our lab regarding the architecture of cationic displays and the resulting effects on biological efficacy. We uncover conjugation of a polyguanidino dendrimer will impart both improved activity against classical targets and novel and potent activity against canonically resistant pathogens.In Chapter 3, I detail the synthesis and characterization of archaea-inspired charge-altering releasable transporters (CART), representing our first excursion into studying the effects of branched lipid side chains on the efficacy, tolerability, and physical properties of CART-mRNA complexes. Within this chapter we describe the systematic variation of sidechain length and block length and its resulting effects on mRNA uptake and expression. Additionally, we uncover a complex emergent relationship between the primary structure of the lipid block and the intramolecular O-to-N acyl shift, characteristic to the neutralization of CART nanoparticles. After isoprenoid CARTs in vitrodisplayed up to 30-fold improvement over a previous gold-standard, we conclude with evaluating the efficacy of intramuscularly administrated isoprenoid CART nanoparticles and their role in a model OVA vaccination.In Chapter 4, I recount the synthesis and evaluation of bioinspired Glycerol-derived CARTs with degradable lipid chains. These materials are reminiscent of the lipidoids utilized in the lipid nanoparticle-based COVID vaccines due to their degradable ester linkages and branched structures. First, we discuss the triglyceride scaffold and examine the effects of lipid length, block length, and polar linker identity on the mRNA delivery efficacy of the co-oligomers. These are the first CART systems where we incorporate hydrogen bond-donors to the lipid block. Upon identifying a diverse set of structures with systematic variation, we screened their efficacy in PBMCs and optimized their ability to transfect primary NK-cells. These transfected NK-cells were then used in several HIV/AIDs related experiments to display enhanced killing of HIV latent cells.Finally, in Chapter 5, we return to the antimicrobial world to evaluate a novel class of antibiotic conjugates with a biguanide moiety. This relative of the guanidinium functional group hosts additional delocalization of the positive charge and additional hydrogen bond donor and acceptors.
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 부출표목-단체명
- 기본자료저록
- Dissertations Abstracts International. 87-01B.
- 전자적 위치 및 접속
- 원문정보보기
MARC
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■020 ▼a9798290652177
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■035 ▼a(MiAaPQ)Stanfordxr716yr5538
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a600
■1001 ▼aRahn, Harrison Patrick.
■24510▼aBranches and Biguanides for Breaching Biological Barriers: The Design, Synthesis, and Evaluation of Novel Cationic Amphiphiles for the Delivery of Nucleic Acids and Antibiotics.
■260 ▼a[S.l.]▼bStanford University. ▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a429 p.
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-01, Section: B.
■500 ▼aAdvisor: Wender, Paul.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2024.
■520 ▼aThe delivery of therapeutics to their intended targets represents an omnipresent challenge for clinical advancements. Whether the drug is a small molecule or a polymer, its successful delivery across biological barriers will influence its final impact on the landscape of medicine and its impact on human health. Antibiotics and nucleic acids are in particular need of assistance due to the many biological and physical mechanisms that impede their efficacy. Antibiotics must penetrate the pathogen's thick membranes and extracellular matrices while nucleic acids must evade nucleases and enter the target cell's cytosol against an electrostatic potential. For these potentially lifesaving technologies to engage with their intended mode of action, they sometimes require the assistance of a transporter.Chapter 1 introduces these biological barriers and methods to breach them in greater detail before I describe in Chapter 2 the synthesis and characterization of dendrimeric technologies we originally developed to deliver mRNA but later exapted and elaborated upon for the treatment of ESKAPE pathogens through conjugation to vancomycin. These transporters explore a long standing question in our lab regarding the architecture of cationic displays and the resulting effects on biological efficacy. We uncover conjugation of a polyguanidino dendrimer will impart both improved activity against classical targets and novel and potent activity against canonically resistant pathogens.In Chapter 3, I detail the synthesis and characterization of archaea-inspired charge-altering releasable transporters (CART), representing our first excursion into studying the effects of branched lipid side chains on the efficacy, tolerability, and physical properties of CART-mRNA complexes. Within this chapter we describe the systematic variation of sidechain length and block length and its resulting effects on mRNA uptake and expression. Additionally, we uncover a complex emergent relationship between the primary structure of the lipid block and the intramolecular O-to-N acyl shift, characteristic to the neutralization of CART nanoparticles. After isoprenoid CARTs in vitrodisplayed up to 30-fold improvement over a previous gold-standard, we conclude with evaluating the efficacy of intramuscularly administrated isoprenoid CART nanoparticles and their role in a model OVA vaccination.In Chapter 4, I recount the synthesis and evaluation of bioinspired Glycerol-derived CARTs with degradable lipid chains. These materials are reminiscent of the lipidoids utilized in the lipid nanoparticle-based COVID vaccines due to their degradable ester linkages and branched structures. First, we discuss the triglyceride scaffold and examine the effects of lipid length, block length, and polar linker identity on the mRNA delivery efficacy of the co-oligomers. These are the first CART systems where we incorporate hydrogen bond-donors to the lipid block. Upon identifying a diverse set of structures with systematic variation, we screened their efficacy in PBMCs and optimized their ability to transfect primary NK-cells. These transfected NK-cells were then used in several HIV/AIDs related experiments to display enhanced killing of HIV latent cells.Finally, in Chapter 5, we return to the antimicrobial world to evaluate a novel class of antibiotic conjugates with a biguanide moiety. This relative of the guanidinium functional group hosts additional delocalization of the positive charge and additional hydrogen bond donor and acceptors.
■590 ▼aSchool code: 0212.
■650 4▼aPathogens.
■650 4▼aAcids.
■650 4▼aToxicity.
■650 4▼aCytotoxicity.
■650 4▼aBioluminescence.
■650 4▼aE coli.
■650 4▼aFlow cytometry.
■650 4▼aLipids.
■650 4▼aImmunization.
■650 4▼aOrganic chemistry.
■650 4▼aMass spectrometry.
■650 4▼aCells.
■650 4▼aPermeability.
■650 4▼aAntibiotics.
■650 4▼aDesign.
■650 4▼aKinetics.
■650 4▼aAlcohol.
■650 4▼aHydrogenation.
■690 ▼a0490
■690 ▼a0389
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g87-01B.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358745▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


