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Platelet and cardiac function in Darier's disease.

S Tavadia1, R C Tait, T A McDonagh

  • 1Department of Dermatology, Royal Infirmary, Castle Street, Glasgow G4 OSF, UK. sherinetavadia@cs.com

Clinical and Experimental Dermatology
|November 28, 2001
PubMed
Summary

Darier's disease, caused by ATP2A2 gene mutations, primarily affects skin. Studies show no consistent cardiac or platelet dysfunction, indicating other body systems are robust to SERCA2 defects.

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Area of Science:

  • Genetics
  • Dermatology
  • Biochemistry

Background:

  • ATP2A2 gene mutations cause Darier's disease.
  • The gene encodes the SERCA2 calcium pump, vital in many tissues.
  • Widespread SERCA2 expression suggests potential multisystem involvement, yet extracutaneous manifestations are not consistently observed.

Purpose of the Study:

  • To investigate potential subtle extracutaneous defects in Darier's disease.
  • To assess cardiac and platelet function in patients with ATP2A2 mutations.
  • To determine if other organ systems are as sensitive to SERCA2 dysfunction as the skin.

Main Methods:

  • Echocardiography (2D, color, Doppler) to evaluate cardiac function in 10 patients.
  • Bleeding time and platelet aggregation studies to assess platelet function in 12 patients.

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Main Results:

  • No evidence of altered cardiac function was found.
  • No consistent defects in platelet function were observed.
  • These findings suggest other systems are resilient to SERCA2 defects.

Conclusions:

  • The skin exhibits high sensitivity to SERCA2 dysfunction.
  • Other major organ systems, including the heart and platelets, appear robust to ATP2A2 mutations.
  • Darier's disease is primarily a cutaneous disorder despite widespread SERCA2 expression.