Calreticulin mutation survey by high resolution melting method associated with unique presentations in essential thrombocythemic patients

Author:

Liu Yi-Chang,Lee Ching-Ping,Yeh Tsung-Jang,Gau Yuh-Ching,Hsieh Chieh-Yu,Ke Ya-Lun,Du Jeng-Shiun,Lin Ming-Hui,Wang Hui-Ching,Tang Shih-Hao,Cho Shih-Feng,Hsu Jui-Feng,Hsiao Samuel Yien,Hsu Chin-Mu,Hsiao Hui-Hua

Abstract

Somatic mutations of exon 9 of calreticulin gene (CALR) were diagnosis and prognosis importance found in patients with JAK2V617F-negative essential thrombocythemia (ET). We survey CALR and JAK2 mutations in our ET patients and study the relationship between mutations and clinical presentations. A total of 60 ET patients were enrolled in the study, and CALR mutations were studied by high resolution melting (HRM) methods and sequencing in JAK2V617F-negative group retrospectively. Clinical manifestations were reviewed retrospectively from chart records. Twenty-one CALR mutations showed eight types of specific melting curves detected by the HRM method and sequencing validation among 26 JAK2 V617F-negative patients. Compared with JAK2 mutations, patients with CALR mutations were younger and had a higher platelet count, lower white cell counts, and lower hemoglobin levels significantly (p<0.05). From our study, HRM methods revealed unique curve types in screening for CALR mutations screening even for complicated mutations. The mutations can be identification rapidly, and cost-effectively by HRM method than other tools. The clinical presentations of CALR mutations from JAK2 mutations showed significant differences and should be checked in ET patients.

Publisher

Institute of Hematology, Catholic University

Subject

Infectious Diseases,Hematology

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