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Related Concept Videos

Sanger Sequencing01:57

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DNA sequencing is a fundamental technique that is routinely used in the biological sciences. This method can be applied to a range of questions at different scales - from the sequencing of a cloned DNA fragment or the study of a mutation in a gene up to whole-genome sequencing. However, despite the widespread use of sequencing today, it was not until 1977 that Fredrick Sanger and his collaborators developed the chain-termination method to decode DNA sequences. It relies on the separation of a...
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The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
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RNA-seq03:21

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RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases. 
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Detecting Somatic Genetic Alterations in Tumor Specimens by Exon Capture and Massively Parallel Sequencing
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Translating sanger-based routine DNA diagnostics into generic massive parallel ion semiconductor sequencing.

Adinda Diekstra1, Ermanno Bosgoed1, Alwin Rikken1

  • 1Department of Human Genetics and.

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Ion semiconductor sequencing offers a cost-effective and accurate alternative to Sanger sequencing for clinical diagnostics. This next-generation sequencing method achieves high sensitivity and specificity, making it suitable for analyzing genetic variants.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Clinical Diagnostics

Background:

  • Sanger sequencing is the established standard for clinical diagnostics, particularly for disorders with low genetic heterogeneity.
  • Next-generation sequencing (NGS) technologies, including benchtop instruments, are increasingly adopted in diagnostic labs for large-scale genetic analysis.
  • NGS platforms are becoming competitive with Sanger sequencing for single-gene or small gene panel analysis.

Purpose of the Study:

  • To develop and validate a generic automated ion semiconductor sequencing workflow for clinical settings.
  • To establish ion semiconductor sequencing as a viable substitute for Sanger sequencing in mutation detection.
  • To reduce sequencing costs and streamline library preparation processes.

Main Methods:

  • Development of an automated ion semiconductor sequencing workflow compatible with clinical use.
  • Utilized standard amplicon-based enrichment, identical to PCR for Sanger sequencing.
  • Implemented a novel post-enrichment pooling strategy to minimize library preparations and reduce costs.

Main Results:

  • Analyzed 1224 known pathogenic variants with 99.92% analytical sensitivity and 99.99% specificity.
  • Blind analysis of 100 patient-derived DNA samples demonstrated comparable performance to Sanger sequencing (99.60% sensitivity, 99.98% specificity).
  • The developed workflow reduced sequencing costs by up to 70% compared to Sanger sequencing.

Conclusions:

  • Ion semiconductor sequencing is a highly sensitive and specific mutation scanning technique.
  • This method is suitable for clinical diagnostics across various genes, regardless of genetic heterogeneity.
  • Ion semiconductor sequencing presents a cost-effective and efficient alternative to Sanger sequencing for routine genetic analysis.