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Kinase Inhibitor Screening In Self-assembled Human Protein Microarrays
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Outcome of ABCA4 microarray screening in routine clinical practice.

Paul J G Ernest1, Camiel J F Boon, B Jeroen Klevering

  • 11Department of Ophthalmology, University Hospital Maastricht, Maastricht, The Netherlands. p.j.g.ernest@gmail.com

Molecular Vision
|December 24, 2009
PubMed
Summary

ABCA4 microarray screening aids Stargardt disease diagnosis, especially for atypical forms. Clinical features significantly impact the accuracy and efficiency of detecting ATP-binding cassette transporter gene mutations.

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Area of Science:

  • Ophthalmology
  • Medical Genetics

Background:

  • Stargardt disease (STGD1) and related dystrophies are often caused by mutations in the ATP-binding cassette transporter gene ABCA4.
  • Accurate genetic diagnosis is crucial for patient management and understanding disease mechanisms.

Purpose of the Study:

  • To retrospectively analyze clinical characteristics of patients screened for ABCA4 mutations using microarray.
  • To evaluate the diagnostic yield of ABCA4 microarray screening in a clinical setting.

Main Methods:

  • Retrospective analysis of 65 patients undergoing ABCA4 microarray screening (2002-2006).
  • Additional denaturing gradient gel electrophoresis (DGGE) used if <2 mutations detected.
  • Patients suspected of STGD1, arCRD, or RP were included.

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Main Results:

  • Of 44 STGD1-suspected patients, 59% had sufficient data for classification (23% typical, 77% atypical).
  • ABCA4 microarray detected 59% of pathogenic alleles; overall detection rate with DGGE was 73%.
  • Younger age at onset (<25 years) and dark choroid on angiography predicted ABCA4 mutations in STGD1 suspects.

Conclusions:

  • ABCA4 microarray screening confirms STGD1 diagnosis and aids diagnosis in atypical cases.
  • Screening efficiency and accuracy are directly related to patient clinical features.
  • Microarray screening is valuable in routine diagnostics for inherited retinal dystrophies.