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Related Concept Videos

Conservative Site-specific Recombination and Phase Variation02:53

Conservative Site-specific Recombination and Phase Variation

Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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Mutations01:35

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Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
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The mutation spectrum in RECQL4 diseases.

H Annika Siitonen1, Jenni Sotkasiira, Martine Biervliet

  • 1Department of Molecular Medicine, National Public Health Institute and FIMM, Institute for Molecular Medicine Finland, Helsinki, Finland.

European Journal of Human Genetics : EJHG
|August 22, 2008
PubMed
Summary
This summary is machine-generated.

RECQL4 gene mutations cause rare syndromes. Patients with RAPADILINO syndrome carrying a specific mutation face a higher risk of developing lymphoma or osteosarcoma.

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Area of Science:

  • Genetics
  • Oncology
  • Pediatrics

Background:

  • RECQL4 gene mutations are linked to Rothmund-Thomson (RTS), RAPADILINO, and Baller-Gerold (BGS) syndromes.
  • These syndromes share growth retardation and radial defects, but RAPADILINO lacks poikiloderma, a key feature of RTS and BGS.

Purpose of the Study:

  • To investigate the cancer risk in patients with RECQL4-associated syndromes, particularly RAPADILINO syndrome.
  • To update the knowledge on RECQL4 mutations and their association with cancer development.

Main Methods:

  • Analysis of cancer incidence in RAPADILINO patients with the c.1390+2delT mutation.
  • Compilation and review of published RECQL4 mutations and associated cancer cases.
  • Reporting of 14 novel RECQL4 mutations with clinical data.

Main Results:

  • RAPADILINO patients with the c.1390+2delT mutation showed an increased risk of lymphoma or osteosarcoma (6/15 patients).
  • A comprehensive summary of known RECQL4 mutations and their cancer associations was compiled.
  • Fourteen new RECQL4 mutations were identified and characterized with clinical information.

Conclusions:

  • Specific RECQL4 mutations, like c.1390+2delT in RAPADILINO syndrome, significantly elevate the risk for specific cancers.
  • Further research and monitoring are warranted for individuals with RECQL4-related disorders to manage cancer risks effectively.