Video Experimental Relacionado
Updated: Sep 8, 2025

14:06
Detection of Rare Genomic Variants from Pooled Sequencing Using SPLINTER
Published on: June 23, 2012
15.3K
Descubrimiento de variantes a escala impulsado por la comunidad: resultados de un Hackathon de genómica de
medRxiv : the preprint server for health sciences
|August 20, 2025
Resumen
Se desarrollaron flujos de trabajo de análisis de variantes de número de copias escalables (CNV) para acelerar el diagnóstico de enfermedades raras. Estos métodos detectan e interpretan eficientemente las CNV a partir de datos de secuenciación del genoma de lectura corta, ayudando a identificar las causas genéticas de la enfermedad.
Área de la Ciencia:
- La genómica
- Enfermedades raras
- La bioinformática
Sus antecedentes:
- Las variantes de número de copias (CNV) son contribuyentes significativos a las enfermedades genéticas raras.
- La detección e interpretación de las CNV a partir de datos de secuenciación del genoma de lectura corta (srGS) es un desafío, especialmente a escala.
- Una gran cantidad de datos srGS existentes siguen siendo subutilizados para la identificación de CNV clínicamente relevantes.
Objetivo del estudio:
- Desarrollar y aplicar flujos de trabajo de análisis de CNV escalables para los datos del srGS.
- Acelerar el diagnóstico y el descubrimiento genético en cohortes de enfermedades raras.
- Abordar el desafío de la detección e interpretación de las CNV en conjuntos de datos a gran escala.
Principales métodos:
- Utilizó Parliament2 para la llamada de variante estructural (SV) y Mosdepth/SLMSuite para el control de calidad basado en la profundidad de lectura y la detección de CNV.
- Aplicó R Shiny para la visualización y desarrolló una base de datos de variantes SV / CNV con anotación.
- Utilizó el agrupamiento DBSCAN para la estimación de la frecuencia alélica y una estrategia de anotación de tres vías para la interpretación.
Principales resultados:
- Desarrolló y aplicó canalizaciones de análisis de CNV escalables a los datos srGS de tres cohortes de enfermedades raras.
- Se identificaron CNV de alta confianza y se simplificó la interpretación, dando como resultado 39 SV patógenos candidatos en un plazo de 2 días.
- Se ha demostrado un rápido filtrado, priorización y visualización de las variantes clínicamente relevantes.
Conclusiones:
- Un Hackathon impulsado por la comunidad demostró con éxito la viabilidad del análisis escalable de CNV.
- Las herramientas y los flujos de trabajo desarrollados aceleran significativamente el diagnóstico y el descubrimiento en la investigación de enfermedades raras.
- Este enfoque mejora la utilidad de los datos srGS existentes para identificar las causas genéticas de las enfermedades raras.
Videos de Conceptos Relacionados
Comparing Copy Number Variations and SNPs
17.9K
Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
17.9K
Genome-wide Association Studies-GWAS
14.1K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
14.1K
Genome Copying Errors
4.4K
DNA replication is a well-evolved process that copies millions of base pairs with high fidelity during each cell division. Occasionally a wrong base or a long stretch of wrong bases may get added to the daughter strands. If the errors are left unchecked, cells might accumulate several mutations that might endanger their survival. Therefore, the copying errors are checked and repaired at three levels.
4.4K
Genomics
37.4K
Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
37.4K
Gene Duplication and Divergence
6.3K
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
6.3K
Genetic Variation
387
Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles,...
Genes exist in different versions called alleles,...
387

