Mutation Detection
Mutation Detection - Related Videos
11:15
Next Generation Sequencing for the Detection of Actionable Mutations in Solid and Liquid Tumors
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Cited by 8 •
2016
This manuscript describes clinical protocols for two next-generation sequencing panels. One panel interrogates hematologic malignancies while the other panel targets genes commonly mutated in solid tumors. Molecular classification of driver mutations in human malignancies offers valuable prognostic and predictive information.
05:11
Wild-Type Blocking PCR to Detect Low-Frequency Somatic Mutations
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2025
This video describes wild-type blocking polymerase chain reaction, or WTB-PCR, which detects somatic mutations. The PCR-based technique uses a locked nucleic acid, or LNA, an oligonucleotide that binds to its complementary wild-type allele and blocks its elongation. The blocking selectively allows the amplification of low-level mutant alleles over their wild-type variants in the sample.
07:08
The Lambda Select cII Mutation Detection System
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Cited by 3 •
2018
We describe a detailed protocol for the Lambda Select cII mutation assay in cultured cells of transgenic rodents or the corresponding animals treated with a chemical/physical agent of interest. This approach has been widely used for mutagenicity testing of carcinogens in mammalian cells.
11:11
Detection of Rare Mutations in CtDNA Using Next Generation Sequencing
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Cited by 23 •
2017
This manuscript describes a technique for detecting mutations of low frequency in ctDNA, ER-Seq. This method is differentiated by its unique use of two-directional error correction, a special background filter, and efficient molecular acquirement.
04:34
Digital Droplet Polymerase Chain Reaction for Indel Mutation Detection in Target Genes
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2025
This video demonstrates the role of digital droplet polymerase chain reaction in identifying indel mutation in a DNA sample. The high precision and sensitivity of ddPCR enable accurate and consistent detection of rare mutations present in a sample, even at low levels. It can identify and quantify indel mutations in different regions of the genome, providing valuable insights into the mechanisms of mutation and the functional consequences of these mutations.
FAQs
A reference sequence or control provides the baseline needed to recognize sequence differences in a biological sample. Without that comparison, a detected DNA pattern cannot be readily distinguished as a change or as the expected sequence. This baseline supports consistent identification of variants across studies of inheritance, disease, genetic diversity, and pathogen evolution.
Mutation detection can identify substitutions, insertions, and deletions within DNA sequences. These changes differ in how the sample sequence departs from its reference, so the analysis must locate and characterize the relevant region rather than simply report that the DNA differs. Identifying the change type helps researchers examine possible effects on genes and cells.
These approaches provide different ways to examine DNA and locate sequence changes. PCR, DNA sequencing, hybridization assays, and targeted variant analysis can be selected according to the biological question and the sequence region being investigated. Their results support comparison with a reference or control, allowing researchers to connect observed variants with genetic or cellular outcomes.
Finding a sequence difference does not by itself explain its biological significance. Researchers therefore examine whether the change can be connected with effects at the molecular or cellular level. This interpretive step is important when studying gene function, disease-associated variation, inherited disorders, or cancer-associated variants, because it moves analysis beyond locating DNA differences.
A general workflow begins with a biological sample and an appropriate reference sequence or control. Researchers then apply a suitable approach, such as PCR, DNA sequencing, a hybridization assay, or targeted variant analysis, to examine the relevant DNA. The resulting sequence information is compared with the baseline, and identified changes are interpreted in context.
Method selection should match the sequence information required by the study. Researchers may use PCR, sequencing, hybridization assays, or targeted variant analysis as alternative approaches for locating changes in DNA. The choice influences how the sample is examined and how directly the resulting data address questions about gene function, disease, inheritance, variation, or pathogen evolution.
Mutation detection is used to investigate inherited disorders, cancer-associated variants, pathogen evolution, population diversity, and gene function. In each setting, researchers compare DNA patterns to identify relevant changes and then consider their biological effects. The same general analytical principle therefore supports both medical genetics and broader studies of variation among organisms or populations.
When combined with biological interpretation, mutation detection can help relate sequence changes to genetic inheritance, disease, gene activity, and cellular effects. It can also reveal patterns of variation among populations or changes associated with pathogen evolution. These outcomes make the approach useful for connecting DNA-level observations with larger biological processes.