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High-Throughput Discovery and Optimization of High Affinity and High Specificity Aptamers
High-Throughput Discovery and Optimization of High Affinity and High Specificity Aptamers
High-Throughput Discovery and Optimization of High Affinity and High Specificity Aptamers

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자료유형  
 학위논문 서양
최종처리일시  
20260202105614
ISBN  
9798265427144
DDC  
612
저자명  
Wan, Leighton Terrance.
서명/저자  
High-Throughput Discovery and Optimization of High Affinity and High Specificity Aptamers
발행사항  
[Sl] : Stanford University, 2023
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2023
형태사항  
133 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: A.
주기사항  
Advisor: Soh, H. Tom.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2023.
초록/해제  
요약Aptamers are synthetic affinity reagents useful for measuring and studying small molecules in biological systems. Unfortunately, the bottleneck in aptamer discovery platforms is the low throughput and high failure rate of canonical aptamer selection methods. To address these issues, I created a high-throughput screening platform to enable multiplexed, simultaneous discovery of specific aptamers against different targets. Canonically, aptamer selections must use techniques such as "counterselection" to ensure aptamer specificity. Unfortunately, using counterselection forces aptamer selections to be single-plex. I developed a platform to identify specific aptamers and forgo the need for techniques such as counterselection. Using a modified a benchtop DNA sequencer, I measured the affinity and specificity for ~106 aptamer clusters. I identified rare, specific aptamers that are able to distinguish between small-molecule metabolites differing by a single hydroxyl group. Further, the platform allows us to optimize and utilize existing aptamers previously limited to fixed environmental conditions. Many published aptamers have been discovered under non-physiological environments. However, changing from selection conditions can reduce aptamer affinity and prevents the use of many aptamers. I demonstrated that small mutations in aptamer sequence can stabilize aptamer affinity in physiological conditions. Understanding structure-mechanism relationships that enable aptamer specificity has often been limited to specialized groups. Thus, improving aptamers through rational design guided by structural information has been largely inaccessible. I developed a novel method to investigate aptamer specificity; the pipeline uses experimental data to guide a computational pipeline for reliable structure determination. My work seeks to address the need for high affinity and high specificity aptamers by enabling multiplexed aptamer discovery and broadening aptamer usability for previously discovered aptamers.
일반주제명  
Physiology
일반주제명  
Acids
일반주제명  
Histograms
일반주제명  
Reagents
일반주제명  
Caffeine
일반주제명  
Mutation
일반주제명  
Glucose
일반주제명  
Biomarkers
일반주제명  
Design
일반주제명  
Standard scores
일반주제명  
Biosensors
일반주제명  
Metabolites
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 87-05A.
전자적 위치 및 접속  
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MARC

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■020    ▼a9798265427144
■035    ▼a(MiAaPQ)AAI32316439
■035    ▼a(MiAaPQ)Stanfordtp231xg1210
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a612
■1001  ▼aWan,  Leighton  Terrance.
■24510▼aHigh-Throughput  Discovery  and  Optimization  of  High  Affinity  and  High  Specificity  Aptamers
■260    ▼a[Sl]▼bStanford  University▼c2023
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2023
■300    ▼a133  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  A.
■500    ▼aAdvisor:  Soh,  H.  Tom.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2023.
■520    ▼aAptamers  are  synthetic  affinity  reagents  useful  for  measuring  and  studying  small  molecules  in  biological  systems.  Unfortunately,  the  bottleneck  in  aptamer  discovery  platforms  is  the  low  throughput  and  high  failure  rate  of  canonical  aptamer  selection  methods.  To  address  these  issues,  I  created  a  high-throughput  screening  platform  to  enable  multiplexed,  simultaneous  discovery  of  specific  aptamers  against  different  targets.  Canonically,  aptamer  selections  must  use  techniques  such  as  "counterselection"  to  ensure  aptamer  specificity.  Unfortunately,  using  counterselection  forces  aptamer  selections  to  be  single-plex.  I  developed  a  platform  to  identify  specific  aptamers  and  forgo  the  need  for  techniques  such  as  counterselection.  Using  a  modified  a  benchtop  DNA  sequencer,  I  measured  the  affinity  and  specificity  for  ~106  aptamer  clusters.  I  identified  rare,  specific  aptamers  that  are  able  to  distinguish  between  small-molecule  metabolites  differing  by  a  single  hydroxyl  group.  Further,  the  platform  allows  us  to  optimize  and  utilize  existing  aptamers  previously  limited  to  fixed  environmental  conditions.  Many  published  aptamers  have  been  discovered  under  non-physiological  environments.  However,  changing  from  selection  conditions  can  reduce  aptamer  affinity  and  prevents  the  use  of  many  aptamers.  I  demonstrated  that  small  mutations  in  aptamer  sequence  can  stabilize  aptamer  affinity  in  physiological  conditions.  Understanding  structure-mechanism  relationships  that  enable  aptamer  specificity  has  often  been  limited  to  specialized  groups.  Thus,  improving  aptamers  through  rational  design  guided  by  structural  information  has  been  largely  inaccessible.  I  developed  a  novel  method  to  investigate  aptamer  specificity;  the  pipeline  uses  experimental  data  to  guide  a  computational  pipeline  for  reliable  structure  determination.  My  work  seeks  to  address  the  need  for  high  affinity  and  high  specificity  aptamers  by  enabling  multiplexed  aptamer  discovery  and  broadening  aptamer  usability  for  previously  discovered  aptamers.
■590    ▼aSchool  code:  0212.
■650  4▼aPhysiology
■650  4▼aAcids
■650  4▼aHistograms
■650  4▼aReagents
■650  4▼aCaffeine
■650  4▼aMutation
■650  4▼aGlucose
■650  4▼aBiomarkers
■650  4▼aDesign
■650  4▼aStandard  scores
■650  4▼aBiosensors
■650  4▼aMetabolites
■690    ▼a0389
■690    ▼a0719
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g87-05A.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360753▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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