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Computational Frameworks for Improved Interpretability of Allele Specific Expression Data
Computational Frameworks for Improved Interpretability of Allele Specific Expression Data
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104709
- ISBN
- 9798293829613
- DDC
- 574
- 서명/저자
- Computational Frameworks for Improved Interpretability of Allele Specific Expression Data
- 발행사항
- [Sl] : The Scripps Research Institute, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 472 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
- 주기사항
- Includes supplementary digital materials.
- 주기사항
- Advisor: Torkamani, Ali;Wu, Chunlei.
- 학위논문주기
- Thesis (Ph.D.)--The Scripps Research Institute, 2025.
- 초록/해제
- 요약The functional interpretation of rare genetic variation remains a critical bottleneck in genomic medicine. While advances in DNA-sequencing through the emergence of next-generation sequencing (NGS) technologies have enabled the comprehensive discovery of genetic variants across population and disease cohorts, many deleterious rare variants elude confident classification. This ambiguity is especially problematic in clinically unsolved or phenotypically heterogeneous cohorts, where genome-first diagnostic approaches often fall short. Transcriptome sequencing (RNA-seq) provides an orthogonal vantage point by capturing the downstream transcriptional consequences of genetic variation in native tissue contexts. Among transcriptome-derived molecular phenotypes, allele-specific expression (ASE)-which quantifies the relative expression of alleles at heterozygous loci-has emerged as a uniquely sensitive readout of cis-regulatory perturbation, capable of detecting dosage imbalance and transcript instability in vivo.Despite its conceptual utility, ASE remains underutilized in both research and diagnostic settings due to key analytical and practical limitations. ASE measurements are acutely susceptible to technical confounders, including RNA degradation, contamination, and mapping bias-artifacts not adequately addressed by conventional quality control procedures designed for total expression analysis. Further, most analytical frameworks reduce ASE to a single informative SNP per gene, discarding valuable multi-locus information. Critically, while ASE-based outlier detection has shown promise in phenotypically uniform rare disease cohorts (e.g., mitochondrial disorders, heart and muscular disease), it has not been systematically extended to unsolved, phenotypically diverse cohorts-where existing interpretation frameworks are least effective.First, I introduce the first dedicated quality control framework for allele-specific expression in large-scale RNA-seq data. Applied to over 15,000 GTEx samples, it uncovers previously unrecognized temporal batch effects that distort ASE and splicing signals, ultimately impairing the interpretation of rare regulatory variants.Second, I introduce an outlier detection platform that leverages haplotype-aware ASE by aggregating allelic signal across phased heterozygous variants within genes, allowing for robust detection of aberrant expression imbalance while accounting for expected allelic variance within the general population. Applied to GTEx and the Multi-Ancestry Gene Expression (MAGE) dataset, this method doubles the number of genes amenable to ASE outlier detection across tissues and further enables the discovery of ancestry-stratified patterns of regulatory constraint. Benchmarking in known rare mendelian muscular disease cohorts confirms improved sensitivity to functional regulatory variation.Finally, to demonstrate translational impact of these frameworks, I apply these frameworks to a cohort of 35 molecular autopsy patients, each of whom died of sudden unexplained death. Analysis of ASE data obtained from cardiac tissue identified rare variants exhibiting significant allelic imbalance and transcriptional signatures indicative of pathophysiologic processes in three previously unsolved cases ultimately leading to improved variant prioritization. These results underscore the utility of ASE-based methods for resolving cryptic genetic etiologies in phenotypically heterogeneous cases.The aim of this dissertation is to advance ASE from a descriptive signal to a robust, scalable, and interpretable transcriptional phenotype with broad utility in variant interpretation. Through the development of ASE quality control, haplotype-level outlier detection, and integrative clinical application, this dissertation provides a generalizable framework for leveraging transcriptomic allelic imbalance to functionally annotate rare genetic variation and improve diagnostic yield in the context of precision medicine.
- 일반주제명
- Bioinformatics
- 일반주제명
- Computer science
- 일반주제명
- Statistics
- 일반주제명
- Medicine
- 일반주제명
- Biostatistics
- 일반주제명
- Genetics
- 키워드
- DNA-seq
- 키워드
- RNA -seq
- 키워드
- Transcriptomics
- 기타저자
- The Scripps Research Institute Computational Biology/Bioinformatics
- 기본자료저록
- Dissertations Abstracts International. 87-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017358485
■00520260202104709
■006m o d
■007cr#unu||||||||
■020 ▼a9798293829613
■035 ▼a(MiAaPQ)AAI32117909
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a574
■1001 ▼aGanapathy, Kaushik Ram.
■24510▼aComputational Frameworks for Improved Interpretability of Allele Specific Expression Data
■260 ▼a[Sl]▼bThe Scripps Research Institute▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a472 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-03, Section: B.
■500 ▼aIncludes supplementary digital materials.
■500 ▼aAdvisor: Torkamani, Ali;Wu, Chunlei.
■5021 ▼aThesis (Ph.D.)--The Scripps Research Institute, 2025.
■520 ▼aThe functional interpretation of rare genetic variation remains a critical bottleneck in genomic medicine. While advances in DNA-sequencing through the emergence of next-generation sequencing (NGS) technologies have enabled the comprehensive discovery of genetic variants across population and disease cohorts, many deleterious rare variants elude confident classification. This ambiguity is especially problematic in clinically unsolved or phenotypically heterogeneous cohorts, where genome-first diagnostic approaches often fall short. Transcriptome sequencing (RNA-seq) provides an orthogonal vantage point by capturing the downstream transcriptional consequences of genetic variation in native tissue contexts. Among transcriptome-derived molecular phenotypes, allele-specific expression (ASE)-which quantifies the relative expression of alleles at heterozygous loci-has emerged as a uniquely sensitive readout of cis-regulatory perturbation, capable of detecting dosage imbalance and transcript instability in vivo.Despite its conceptual utility, ASE remains underutilized in both research and diagnostic settings due to key analytical and practical limitations. ASE measurements are acutely susceptible to technical confounders, including RNA degradation, contamination, and mapping bias-artifacts not adequately addressed by conventional quality control procedures designed for total expression analysis. Further, most analytical frameworks reduce ASE to a single informative SNP per gene, discarding valuable multi-locus information. Critically, while ASE-based outlier detection has shown promise in phenotypically uniform rare disease cohorts (e.g., mitochondrial disorders, heart and muscular disease), it has not been systematically extended to unsolved, phenotypically diverse cohorts-where existing interpretation frameworks are least effective.First, I introduce the first dedicated quality control framework for allele-specific expression in large-scale RNA-seq data. Applied to over 15,000 GTEx samples, it uncovers previously unrecognized temporal batch effects that distort ASE and splicing signals, ultimately impairing the interpretation of rare regulatory variants.Second, I introduce an outlier detection platform that leverages haplotype-aware ASE by aggregating allelic signal across phased heterozygous variants within genes, allowing for robust detection of aberrant expression imbalance while accounting for expected allelic variance within the general population. Applied to GTEx and the Multi-Ancestry Gene Expression (MAGE) dataset, this method doubles the number of genes amenable to ASE outlier detection across tissues and further enables the discovery of ancestry-stratified patterns of regulatory constraint. Benchmarking in known rare mendelian muscular disease cohorts confirms improved sensitivity to functional regulatory variation.Finally, to demonstrate translational impact of these frameworks, I apply these frameworks to a cohort of 35 molecular autopsy patients, each of whom died of sudden unexplained death. Analysis of ASE data obtained from cardiac tissue identified rare variants exhibiting significant allelic imbalance and transcriptional signatures indicative of pathophysiologic processes in three previously unsolved cases ultimately leading to improved variant prioritization. These results underscore the utility of ASE-based methods for resolving cryptic genetic etiologies in phenotypically heterogeneous cases.The aim of this dissertation is to advance ASE from a descriptive signal to a robust, scalable, and interpretable transcriptional phenotype with broad utility in variant interpretation. Through the development of ASE quality control, haplotype-level outlier detection, and integrative clinical application, this dissertation provides a generalizable framework for leveraging transcriptomic allelic imbalance to functionally annotate rare genetic variation and improve diagnostic yield in the context of precision medicine.
■590 ▼aSchool code: 1179.
■650 4▼aBioinformatics
■650 4▼aComputer science
■650 4▼aStatistics
■650 4▼aMedicine
■650 4▼aBiostatistics
■650 4▼aGenetics
■653 ▼aAllele-specific expression
■653 ▼aDNA-seq
■653 ▼aRNA -seq
■653 ▼aStatistical modelling
■653 ▼aTranscriptomics
■690 ▼a0715
■690 ▼a0984
■690 ▼a0463
■690 ▼a0564
■690 ▼a0369
■690 ▼a0308
■71020▼aThe Scripps Research Institute▼bComputational Biology/Bioinformatics.
■7730 ▼tDissertations Abstracts International▼g87-03B.
■790 ▼a1179
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358485▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


