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Increasing Network Detection of Side Effects by Improving Side Effect Pathway Definition and Drug Target Associations
Increasing Network Detection of Side Effects by Improving Side Effect Pathway Definition a...
Increasing Network Detection of Side Effects by Improving Side Effect Pathway Definition and Drug Target Associations

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211153046
ISBN  
9798346811329
DDC  
590
저자명  
Alidoost, Mohammadali.
서명/저자  
Increasing Network Detection of Side Effects by Improving Side Effect Pathway Definition and Drug Target Associations
발행사항  
[Sl] : University of California, Los Angeles, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
140 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-06, Section: B.
주기사항  
Includes supplementary digital materials.
주기사항  
Advisor: Wilson, Jennifer L.
학위논문주기  
Thesis (Ph.D.)--University of California, Los Angeles, 2024.
초록/해제  
요약Accurate prediction of drug side effects remains a significant challenge in pharmaceutical development, as drug programs often fail due to unforeseen adverse reactions. Traditional preclinical approaches, such as animal testing, face limitations, including high costs, ethical challenges, and limited translatability to human biology. To address these limitations, we enhanced side effect prediction using computational models, specifically protein-protein interaction networks. We utilized the PathFX algorithm, a protein-protein interaction network tool, to predict adverse drug effects, focusing on improving prediction performance by addressing issues of overprediction and underprediction. Two main strategies were employed in this study: First, we refined pathway phenotypes by integrating key network genes and omics data, enhancing the biological context for side effect prediction. Second, we incorporated new drug-binding targets from multiple databases to broaden the view of potential drug-target interactions. Using a drug toxicity dataset, we assessed PathFX's ability to predict side effects by generating drug networks and evaluating their pathway phenotypes. The baseline performance was low and variable across drugs and side effects. However, by refining pathway phenotypes, we reduced overprediction and false positive results, while observing a trade-off between specificity and sensitivity. Specifically, incorporating omics data increased sensitivity but led to reduced specificity, highlighting the balance between limiting false positives and increasing true positive predictions. When compared to animal studies, our computational predictions demonstrated similar performance metrics, suggesting that protein-protein interaction network models, despite limitations, hold value in drug safety evaluation. Furthermore, integrating drug-target interactions from diverse sources enabled the prediction of previously unrecognized side effects, effectively addressing underprediction. We also observed a trade-off between specificity and sensitivity in this approach. Notably, incorporating multiple sources of drug-target interactions proved more impactful in improving side effect predictions than refining pathway phenotypes alone. Our results suggest that databases with broad target coverage are particularly advantageous during the early stages of drug development, providing a wide array of potential interactions. Conversely, databases with a higher percentage of predictive targets are more valuable in later stages, offering refined and specific predictions to enhance phenotype-target associations. Taken together, by tuning pathway definitions and drug target inputs, this study suggests a pathway towards improved prediction performance and rational application of protein-protein interaction models to anticipate drug-induced side effects. This research also emphasizes shifting focus from conventional performance metrics, such as sensitivity and specificity, to model utility, the practical impact of predictions on clinical decision-making. This approach has broader applications. For instance, we found that the utility of a model, in deep learning-based brain vessel segmentation, often supersedes traditional performance metrics like the Dice score, which measures overlap between predicted and actual structures but may not fully capture clinical relevance. By prioritizing the model's practical application in accurately identifying anatomically significant structures, we demonstrated how focusing on utility can lead to more meaningful outcomes in both drug safety predictions and medical imaging.
일반주제명  
Systematic biology
일반주제명  
Bioinformatics
일반주제명  
Pharmacology
일반주제명  
Medical imaging
키워드  
Drug development
키워드  
Drug pathways
키워드  
Drug safety
키워드  
Drug side effects
키워드  
Drug target interactions
키워드  
Network analysis
기타저자  
University of California, Los Angeles Bioengineering 0288
기본자료저록  
Dissertations Abstracts International. 86-06B.
전자적 위치 및 접속  
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MARC

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■020    ▼a9798346811329
■035    ▼a(MiAaPQ)AAI31640985
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a590
■1001  ▼aAlidoost,  Mohammadali.
■24510▼aIncreasing  Network  Detection  of  Side  Effects  by  Improving  Side  Effect  Pathway  Definition  and  Drug  Target  Associations
■260    ▼a[Sl]▼bUniversity  of  California,  Los  Angeles▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a140  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-06,  Section:  B.
■500    ▼aIncludes  supplementary  digital  materials.
■500    ▼aAdvisor:  Wilson,  Jennifer  L.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Los  Angeles,  2024.
■520    ▼aAccurate  prediction  of  drug  side  effects  remains  a  significant  challenge  in  pharmaceutical  development,  as  drug  programs  often  fail  due  to  unforeseen  adverse  reactions.  Traditional  preclinical  approaches,  such  as  animal  testing,  face  limitations,  including  high  costs,  ethical  challenges,  and  limited  translatability  to  human  biology.  To  address  these  limitations,  we  enhanced  side  effect  prediction  using  computational  models,  specifically  protein-protein  interaction  networks.  We  utilized  the  PathFX  algorithm,  a  protein-protein  interaction  network  tool,  to  predict  adverse  drug  effects,  focusing  on  improving  prediction  performance  by  addressing  issues  of  overprediction  and  underprediction.  Two  main  strategies  were  employed  in  this  study:  First,  we  refined  pathway  phenotypes  by  integrating  key  network  genes  and  omics  data,  enhancing  the  biological  context  for  side  effect  prediction.  Second,  we  incorporated  new  drug-binding  targets  from  multiple  databases  to  broaden  the  view  of  potential  drug-target  interactions.  Using  a  drug  toxicity  dataset,  we  assessed  PathFX's  ability  to  predict  side  effects  by  generating  drug  networks  and  evaluating  their  pathway  phenotypes.  The  baseline  performance  was  low  and  variable  across  drugs  and  side  effects.  However,  by  refining  pathway  phenotypes,  we  reduced  overprediction  and  false  positive  results,  while  observing  a  trade-off  between  specificity  and  sensitivity.  Specifically,  incorporating  omics  data  increased  sensitivity  but  led  to  reduced  specificity,  highlighting  the  balance  between  limiting  false  positives  and  increasing  true  positive  predictions.  When  compared  to  animal  studies,  our  computational  predictions  demonstrated  similar  performance  metrics,  suggesting  that  protein-protein  interaction  network  models,  despite  limitations,  hold  value  in  drug  safety  evaluation.  Furthermore,  integrating  drug-target  interactions  from  diverse  sources  enabled  the  prediction  of  previously  unrecognized  side  effects,  effectively  addressing  underprediction.  We  also  observed  a  trade-off  between  specificity  and  sensitivity  in  this  approach.  Notably,  incorporating  multiple  sources  of  drug-target  interactions  proved  more  impactful  in  improving  side  effect  predictions  than  refining  pathway  phenotypes  alone.  Our  results  suggest  that  databases  with  broad  target  coverage  are  particularly  advantageous  during  the  early  stages  of  drug  development,  providing  a  wide  array  of  potential  interactions.  Conversely,  databases  with  a  higher  percentage  of  predictive  targets  are  more  valuable  in  later  stages,  offering  refined  and  specific  predictions  to  enhance  phenotype-target  associations.  Taken  together,  by  tuning  pathway  definitions  and  drug  target  inputs,  this  study  suggests  a  pathway  towards  improved  prediction  performance  and  rational  application  of  protein-protein  interaction  models  to  anticipate  drug-induced  side  effects.  This  research  also  emphasizes  shifting  focus  from  conventional  performance  metrics,  such  as  sensitivity  and  specificity,  to  model  utility,  the  practical  impact  of  predictions  on  clinical  decision-making.  This  approach  has  broader  applications.  For  instance,  we  found  that  the  utility  of  a  model,  in  deep  learning-based  brain  vessel  segmentation,  often  supersedes  traditional  performance  metrics  like  the  Dice  score,  which  measures  overlap  between  predicted  and  actual  structures  but  may  not  fully  capture  clinical  relevance.  By  prioritizing  the  model's  practical  application  in  accurately  identifying  anatomically  significant  structures,  we  demonstrated  how  focusing  on  utility  can  lead  to  more  meaningful  outcomes  in  both  drug  safety  predictions  and  medical  imaging.
■590    ▼aSchool  code:  0031.
■650  4▼aSystematic  biology
■650  4▼aBioinformatics
■650  4▼aPharmacology
■650  4▼aMedical  imaging
■653    ▼aDrug  development
■653    ▼aDrug  pathways
■653    ▼aDrug  safety
■653    ▼aDrug  side  effects
■653    ▼aDrug  target  interactions
■653    ▼aNetwork  analysis
■690    ▼a0423
■690    ▼a0715
■690    ▼a0574
■690    ▼a0419
■71020▼aUniversity  of  California,  Los  Angeles▼bBioengineering  0288.
■7730  ▼tDissertations  Abstracts  International▼g86-06B.
■790    ▼a0031
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164791▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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