The measurement of serum ceruloplasmin is useful for diagnostic differentiation of immune thrombocytopenic purpura

Mitsuhiro Chousa, Hiroyasu Ito, Kuniaki Saito, Kanako Takahashi, Masao Takemura, Takeshi Takahashi, Eiichi Tomita, Mitsuru Seishima

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Background: To expand the criteria of immune thrombocytopenic purpura (ITP), which is a diagnosis of exclusion, we analyzed proteins separated by 1-dimensional gel electrophoresis of the retained fraction in a Con A-Sepharose column from ITP patients' sera. Methods: Serum samples were from 19 adult patients with chronic ITP, 9 patients with thrombocytopenia of decreased production, and 20 healthy controls. Samples were applied to a Con A-Sepharose column, and the retained fraction was subjected to 10% SDS-PAGE. The % area of each densitometric protein peak was compared between the two groups and proteins in each band were identified using LC-MS/MS. Results: Eleven protein bands were distinctly separated by 1-dimensional electrophoresis. The percent area of bands #2 and #3 were significantly higher in ITP patients than in controls. The percent area of band #2 (p < 0.01) was significantly higher in ITP patients than in non-ITP patients. We identified α2-macroglobulin, ceruloplasmin (Cp), and C3 in band #2 and complement factor B in #3 band. Serum concentrations of α2-macroglobulin and Cp were significantly higher in ITP patients than in controls. Serum concentrations of Cp were significantly higher in ITP patients than in non-ITP patients (p = 0.0005). Serum complement factor B concentrations were significantly higher in ITP patients and non-ITP patients than in controls. ROC analysis showed that the total percent area of bands #2 and #3, and Cp had higher diagnosis availability for ITP patients when compared with controls and non-ITP patients, respectively. Conclusions: Measurement of Cp separated by the present method could be useful for the diagnosis of ITP in the presence of thrombocytopenia and a non- or low-inflammatory state.

Original languageEnglish
Pages (from-to)132-138
Number of pages7
JournalClinica Chimica Acta
Issue number1-2
Publication statusPublished - 01-03-2008


All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Clinical Biochemistry
  • Biochemistry, medical

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