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Model Membrane Composition and Interaction: From Vesicle Variabillity to Lipid Nanoparticle Binding
Model Membrane Composition and Interaction: From Vesicle Variabillity to Lipid Nanoparticle Binding
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103137
- ISBN
- 9798311957670
- DDC
- 574
- 서명/저자
- Model Membrane Composition and Interaction: From Vesicle Variabillity to Lipid Nanoparticle Binding
- 발행사항
- [Sl] : Stanford University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 192 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisor: Boxer, Steven.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2025.
- 초록/해제
- 요약Biological membranes feature a wide variety lipid and protein components, both of which are relevant with respect to cell signaling, compartmentalization, viral infection and the delivery of therapeutics. Understanding the organization, structure and interactions of lipids, particularly over small length scales, remains a fundamental barrier that limits our understanding of biological membranes. Simple model membrane systems containing only a few components can be used to investigate membrane organization, structure and function by allowing for finer control over the experimental conditions, greatly reducing the number of confounding variables present in cellbased studies.To investigate these interactions, I utilize and build upon techniques developed in the Boxer lab to study the lateral organization of lipids within membranes, the variability in composition between individual model vesicles and interactions between lipid nanoparticles and planar supported lipid bilayers. These studies provide fundamental insights not only into the factors that govern membrane organization and interactions, but also some of the limitations of conventional model membrane systems.Chapter 2 details work on lateral organization within model membrane systems. Lateral organization is thought to take place on tens of nanometers in biological membranes, far below the diffraction limit. This is further complicated by the fact that addition of fluorescent labels onto lipid species may have perturbative effects, particularly to such delicate interactions. This makes it challenging to examine these small-scale interactions via conventional means. By leveraging and building upon prior work from the Boxer lab, I examine sub-diffraction limit interactions in isotopically labeled model membranes using secondary ion mass spectrometry (SIMS). Using a variation on conventional imaging mass spectrometry where ion recombination is monitored, I probe the effect of cholesterol of the average distances between different lipid species and find evidence for the existence of clusters of glycosphingolipid GM1 model membranes.Chapter 3 examines the variation in composition between individual giant unilamellar vesicles (GUVs) via NanoSIMS. Although GUVs are a common system for examining lipid-lipid interactions, reconstituting membrane proteins and encapsulating cellular biochemical reactions, there is thought to be substantial variation in the lipid composition between individual GUVs. I compare two different methods for GUV formation, gentle hydration and electroformation, and find that both display compositional variation on the order of 1-4 mole percent, although electroformed GUVs are less variable. These measurements provide the first direct and quantitative evidence for this variability and suggest that care must be taken with respect to the collection and interpretation of GUV data.Finally, in Chapter 4 I examine the interactions between lipid nanoparticles (LNPs) and planar model membranes via single-particle fluorescence microscopy. Although LNPs are a widely used vector for the delivery of oligonucleotide therapeutics, the mechanism behind their function is poorly-understood. In particular, the interaction between LNPs and target membrane as a function of oligo content and particle composition is not known. I build on prior work from other groups to develop and apply an assay to monitor the binding of single LNPs to planar lipid bilayers. These binding experiments demonstrate that the addition of RNA content of LNPs reduces their interactions with target supported lipid bilayers.
- 일반주제명
- Membranes
- 일반주제명
- Mass spectrometry
- 일반주제명
- Ribonucleic acid--RNA
- 일반주제명
- Nanoparticles
- 일반주제명
- Detergents
- 일반주제명
- Microscopy
- 일반주제명
- Cholesterol
- 일반주제명
- Sterols
- 일반주제명
- Scientific imaging
- 일반주제명
- Ion beams
- 일반주제명
- Yeast
- 일반주제명
- Clustering
- 일반주제명
- Lipids
- 일반주제명
- Polyethylene glycol
- 일반주제명
- Hydration
- 일반주제명
- Biochemistry
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798311957670
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■0820 ▼a574
■1001 ▼aGrusky, Dashiel Szelenyi.
■24510▼aModel Membrane Composition and Interaction: From Vesicle Variabillity to Lipid Nanoparticle Binding
■260 ▼a[Sl]▼bStanford University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a192 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisor: Boxer, Steven.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2025.
■520 ▼aBiological membranes feature a wide variety lipid and protein components, both of which are relevant with respect to cell signaling, compartmentalization, viral infection and the delivery of therapeutics. Understanding the organization, structure and interactions of lipids, particularly over small length scales, remains a fundamental barrier that limits our understanding of biological membranes. Simple model membrane systems containing only a few components can be used to investigate membrane organization, structure and function by allowing for finer control over the experimental conditions, greatly reducing the number of confounding variables present in cellbased studies.To investigate these interactions, I utilize and build upon techniques developed in the Boxer lab to study the lateral organization of lipids within membranes, the variability in composition between individual model vesicles and interactions between lipid nanoparticles and planar supported lipid bilayers. These studies provide fundamental insights not only into the factors that govern membrane organization and interactions, but also some of the limitations of conventional model membrane systems.Chapter 2 details work on lateral organization within model membrane systems. Lateral organization is thought to take place on tens of nanometers in biological membranes, far below the diffraction limit. This is further complicated by the fact that addition of fluorescent labels onto lipid species may have perturbative effects, particularly to such delicate interactions. This makes it challenging to examine these small-scale interactions via conventional means. By leveraging and building upon prior work from the Boxer lab, I examine sub-diffraction limit interactions in isotopically labeled model membranes using secondary ion mass spectrometry (SIMS). Using a variation on conventional imaging mass spectrometry where ion recombination is monitored, I probe the effect of cholesterol of the average distances between different lipid species and find evidence for the existence of clusters of glycosphingolipid GM1 model membranes.Chapter 3 examines the variation in composition between individual giant unilamellar vesicles (GUVs) via NanoSIMS. Although GUVs are a common system for examining lipid-lipid interactions, reconstituting membrane proteins and encapsulating cellular biochemical reactions, there is thought to be substantial variation in the lipid composition between individual GUVs. I compare two different methods for GUV formation, gentle hydration and electroformation, and find that both display compositional variation on the order of 1-4 mole percent, although electroformed GUVs are less variable. These measurements provide the first direct and quantitative evidence for this variability and suggest that care must be taken with respect to the collection and interpretation of GUV data.Finally, in Chapter 4 I examine the interactions between lipid nanoparticles (LNPs) and planar model membranes via single-particle fluorescence microscopy. Although LNPs are a widely used vector for the delivery of oligonucleotide therapeutics, the mechanism behind their function is poorly-understood. In particular, the interaction between LNPs and target membrane as a function of oligo content and particle composition is not known. I build on prior work from other groups to develop and apply an assay to monitor the binding of single LNPs to planar lipid bilayers. These binding experiments demonstrate that the addition of RNA content of LNPs reduces their interactions with target supported lipid bilayers.
■590 ▼aSchool code: 0212.
■650 4▼aMembranes
■650 4▼aMass spectrometry
■650 4▼aRibonucleic acid--RNA
■650 4▼aNanoparticles
■650 4▼aDetergents
■650 4▼aMicroscopy
■650 4▼aCholesterol
■650 4▼aSterols
■650 4▼aScientific imaging
■650 4▼aIon beams
■650 4▼aYeast
■650 4▼aClustering
■650 4▼aLipids
■650 4▼aPolyethylene glycol
■650 4▼aHydration
■650 4▼aBiochemistry
■690 ▼a0487
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357136▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


