Assessment of the capability of the fluid model of automatic blood cell analyzer in white blood cell count and classification / 中华血液学杂志

<p><b>OBJECTIVE</b>To evaluate the application of XT-4000i automatic blood cell analyzer in white cell count and classification of cerebrospinal fluid (CSF).</p><p><b>METHODS</b>The fluid model of XT-4000i automatic blood cell analyzer was directly used to detect the white cell count and classification in 200 samples of CSF, and compared with the results obtained by manually microscopic counting method. White blood cell classification was performed by manual method under microscope with Wright's staining,and instrumental method with fluorescence staining and flow cytometry.</p><p><b>RESULTS</b>There is no statistical difference between instrumental and manual method in detecting the absolute counting of WBC, RBC, mononuclear cell and multinucleate cells (P>0.05), and there is a good correlation between the two methods (r=0.987, 0.999, 0.981 and 0.983 for WBC, RBC, mononuclear cell and multinucleate cell counts). Tumor cells in the samples with high fluorescent staining by instrumental method can be identified with Wright's staining by microscope method, which were consistent with the clinical diagnosis.</p><p><b>CONCLUSION</b>The fluid model of XT-4000i automatic blood cell analyzer was rapid and accurate in CSF white cell count and classification,and it also can provide preliminary information for tumor cells screening. The fluid model of XT-4000i automatic blood cell analyzer in white cell count and classification of CSF has the value of popularization in clinical application.</p>

Analysis of cytogenetic characteristics in patients with myelodysplastic syndrome / 中国实验血液学杂志

This study was aimed to investigate the distribution of chromosomal aberrational karyotype in myelodysplastic syndrome (MDS) subgroups, the characterizations of numerical and structural aberration. The chromosome was prepared with simple culture of bone marrow, and the karyotype was analysed by G banding technique. The results showed tht 54 out of 127 patients (42.5%) had clonal chromosome aberrations, and the abnormal rates were different in subgroups: 30% (3/10) in MDS-RA, 35.9% (23/64) in MDS-RCMD, 22.2% (2/9) in MDS-RAS, 45% (9/20) in MDS-RAEB-I, 66.7% (14/21) in MDS-RAEB-II, 100% (3/3) in 5q-syndrome, respectively. Among 54 abnormal chromosome patients, 21 patients showed numerical aberration, 14 patients showed structural aberration, and the other 19 patients showed both numerical and structural aberration. The order of frequent aberrations was as follows complex karyotype (11.02%, 14/127), single +8 (10.24%, 13/127), -7/7q- (3.9%, 5/127), 1q+ (3.15%, 4/127), -X/-Y (3.15%, 4/127), 20q- (2.36%, 3/127), 5q- (2.36%, 3/127). The frequency of complex karyotype in MDS-RAEB (including RAEB-I and RAEB-II) was higher than that in non MDS-RAEB (including RA, RCMD, RAS, 5q-syndrome) (P < 0.05), and the frequency of balanced translocation was lower than that in non-balanced translocation (P < 0.05), and both of the two balanced translocation patients were found in MDS-RAEB. It is concluded that MDS is highly heterogeneous clonal disorder, a great majority of cytogenetic changes can be detected and most of which are recurrent aberrations, balanced translocations are rare, and only found in MDS-RAEB. The frequency of complex karyotype in MDS-RAEB is higher, and the patients with dup (1) (q21q32) recurrent abnormality is common in this study.

Change of T lymphocyte and its activated subsets in SARS patients / 中国医学科学院学报

<p><b>OBJECTIVE</b>To study abnormal changes of T lymphocyte and its activated subsets in severe acute respiratory syndrome (SARS) patients.</p><p><b>METHODS</b>Flow cytometer with multi-color flouroscence and hematology analyzer were used to detect the expression of T lymphocyte and its activated a subsets in 240 SARS patients including 50 cases of critical type and 190 cases of common type.</p><p><b>RESULTS</b>Statistical analysis by means of SAS software showed that there was significant decrease in absolute counts (AC) of T lymphocyte and its subsets in SARS patients when compared with normal people, while percentages (PC) of CD3+CD25+ and CD3+ HLA-DR+ subsets were increased markedly. Compared with common type, there was significant decrease in absolute counts of critical type of T lymphocyte, CD4+, CD25+CD3+, CD28+CD4+, and CD95+CD4+subsets. The ACs of T lymphocytes including CD4 and CD8 subsets in different phases were as below: III > II > I. The ACs of subsets involved in activation such as CD3+ HLA-DR+/lym, CD3+CD25+/lym, CD28+CD4+/CD4, CD28+CD8+/CD8, and CD38+CD4+/CD4 all were highest in group III. In addition, the AC and PC of CD95+CD4+/CD4 and CD95+CD8/CD8 subset in group III were highest while group I was lowest.</p><p><b>CONCLUSIONS</b>With depressing cellular immunity, the activation of T lymphocytes were suppressed obviously in SARS patients, especially for critical patients.</p>