Immunophenotypic Analysis of Patients with CD56⁺ Acute Myeloid Leukemia / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To explore the immunophenotype characteristics of newly diagnosed patients with CD56⁺ acute myeloid leukemia (AML).</p><p><b>METHODS</b>Combining with cytomorphology, four-color flow cytometry was used to analyze the immunophenotype of 342 AML patients with CD56⁺ or CD56⁻.</p><p><b>RESULTS</b>In 342 AML patients, the CD56⁺ expression was found in 83 AML patients who accounted for 24.27% and included 10 cases of M1, 45 cases of M2, 5 cases of M3, 6 cases of M6 and 17 cases of M5. The statistical analysis showed that there was statistical difference between CD56⁺ and CD11b⁺ patients (P < 0.05), but there was no statistical difference between CD56⁺ and HLA-DR, CD34, CD38, CD13, CD33, CD15, CD117, CD14, CD64, CD2, CD7, CD5, CD3, CD4, CD10, CD19, CD20, CD22 (P > 0.05).</p><p><b>CONCLUSION</b>AML with only CD56 positive always has poor prognosis, thus the prognosis of patients with CD56⁺ AML accompanied by other antigens still needs more research.</p>

Expression characteristics of CD200 in acute myeloid leukemia and its clinical significance / 中国实验血液学杂志

This study was aimed to investigate the relationship between expression of CD200 antigen and clinical characteristics in AML patients and to analyse the value of CD200 in evaluation of AML prognosis. The CD200 and immunophenotypes were detected by flow cytometry, the chromosome karyotypes were determined by R banding, the FISH was used to measure the AML1/ETO, PML/RARa and inv(16), and PCR technique was used to detect the fusion genes AML1/ETO and PML/RARα. The results showed that the positive rate of CD200 antigen expression in 54 patients was 57.4% (31/54), the CD200 antigen expression between sex and age of patients was no significant different (P > 0.05). There was significant difference of CD200 expression between CD34 and CD117 (P < 0.05), but the difference of CD200 expression in chromosome karyotypes was no significant difference(P > 0.05). Moreover, there was significant difference of CD200 expression in CD34 and CD117 of CBF positive AML patients (P < 0.05). It is concluded that the CD200 antigen expression in AML may associate with a poor prognosis of patients.