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Osteopontin expression in biopsies of calciphylaxis
Cynthia M Magro1, Shabnam Momtahen1, Joshua W Hagen2
1Department of Pathology, Laboratory Medicine, Weill Cornell Medical College of Cornell University, 1300 York Ave, New York, NY, 10065 USA.
European Journal of Dermatology : EJD
|April 8, 2015
Summary
Calciphylaxis is a vascular disease with calcification and thrombosis. Osteopontin expression in lesions suggests it plays a key role in calciphylaxis development and may be a treatment target.
Area of Science:
- Vascular pathology
- Dermatology
- Nephrology
Background:
- Calciphylaxis is a severe condition characterized by vascular calcification and thrombosis.
- Its pathogenesis and diagnostic markers are not fully understood.
Purpose of the Study:
- To investigate osteopontin expression in calciphylaxis lesions.
- To determine the role of osteopontin in the pathogenesis of calciphylaxis.
Main Methods:
- Analysis of 25 skin biopsies from patients diagnosed with calciphylaxis.
- Assessment of osteopontin expression using immunohistochemistry.
Main Results:
- Calciphylaxis commonly affects lower extremities, with renal failure present in most cases.
- Osteopontin expression was observed in calcified and non-calcified vessels within the subcutis.
- Thrombogenic vasculopathy was noted in some cases, even without calcification.
Conclusions:
- Calciphylaxis is a calcific thrombogenic vasculopathy not exclusive to renal failure.
- Ectopic osteopontin expression appears to be an early event in calciphylaxis pathogenesis.
- Targeting osteopontin may offer a therapeutic strategy for calciphylaxis.
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