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Related Experiment Videos

Gene diagnosis in X-linked ichthyosis.

F H Herrmann1, B Wirth, K Wulff

  • 1Institut für Medizinische Genetik, Ernst-Moritz-Arndt-Universität, Greifswald, German Democratic Republic.

Archives of Dermatological Research
|January 1, 1989
PubMed
Summary

Submicroscopic deletions in the STS gene cause X-linked ichthyosis (XLI). DNA analysis and biochemical tests reliably detect these genetic defects for diagnosis and counseling.

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Area of Science:

  • Genetics
  • Molecular Biology
  • Dermatology

Background:

  • X-linked ichthyosis (XLI) is a genetic skin disorder.
  • The STS gene is implicated in XLI pathogenesis.

Purpose of the Study:

  • To analyze genetic deletions in families with XLI.
  • To evaluate diagnostic methods for XLI.

Main Methods:

  • Utilized full-length STS cDNA probe and polymorphic DNA sequence (GMGX9) for molecular hybridization.
  • Performed DNA analysis for indirect genotype diagnosis.
  • Included arylsulfatase C/beta-gal determination for biochemical testing.

Main Results:

  • Detected submicroscopic chromosomal deletions in patients from two of three analyzed families using STS and GMGX9 probes.

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  • Identified normal hybridization patterns in the third family, similar to healthy males.
  • Demonstrated strong agreement between DNA analysis and biochemical test results.

    • Conclusions:

    • Submicroscopic deletions in the STS gene are a cause of XLI.
    • Both DNA analysis and biochemical tests are reliable for diagnosing XLI.
    • These methods support carrier detection, prenatal diagnosis, and genetic counseling for XLI.