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Related Concept Videos

Karyotyping01:17

Karyotyping

Overview
Karyotyping01:17

Karyotyping

Overview
DNA Microarrays02:34

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
Comparing Copy Number Variations and SNPs02:26

Comparing Copy Number Variations and SNPs

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%...

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Single-nucleotide polymorphism array karyotyping in clinical practice: where, when, and how?

Aiko Sato-Otsubo1, Masashi Sanada, Seishi Ogawa

  • 1Cancer Genomics Project, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.

Seminars in Oncology
|February 1, 2012
PubMed
Summary
This summary is machine-generated.

Single-nucleotide polymorphism array (SNP-A) karyotyping offers genome-wide detection of genetic lesions in cancers, including hematopoietic neoplasms. This technology sensitively identifies copy number alterations and copy neutral loss of heterozygosity, improving cancer diagnosis.

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Area of Science:

  • Genomics
  • Cancer Genetics
  • Molecular Diagnostics

Background:

  • Single-nucleotide polymorphism array (SNP-A) karyotyping is an advanced technology for detecting genetic alterations.
  • Human cancers, particularly hematopoietic neoplasms, harbor various genetic lesions.
  • Copy number alterations and allelic imbalances are key genetic events in cancer.

Purpose of the Study:

  • To review the current status and applications of SNP-A karyotyping in hematopoietic neoplasms.
  • To highlight the capabilities of SNP-A karyotyping in detecting specific genetic lesions.
  • To compare SNP-A karyotyping with conventional methods for cancer diagnosis.

Main Methods:

  • Utilizing high-density microarrays with allele-specific probes for genome-wide analysis.
  • Employing SNP-A karyotyping to detect copy number alterations and allelic imbalances.
  • Assessing the capacity for detecting copy neutral loss of heterozygosity (CN-LOH) and uniparental disomy (UPD).

Main Results:

  • SNP-A karyotyping enables sensitive, genome-wide detection of genetic lesions at high resolution.
  • It is the only platform for genome-scale detection of CN-LOH/UPD, common in cancer.
  • The technology complements and potentially surpasses conventional karyotyping for certain genetic alterations.

Conclusions:

  • SNP-A karyotyping is a powerful tool for analyzing genetic lesions in hematopoietic neoplasms.
  • Its ability to detect CN-LOH/UPD offers significant advantages in cancer genomics.
  • This technology promises to enhance the accuracy of genetic diagnosis in clinical practice for these cancers.