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Objective: To analyze the expression and clinical characteristics of CD68 in bone marrow and peripheral blood of patients with acute myeloid leukemia (AML)., Methods: The expression of CD68 in bone marrow blast cells was detected by four-color flow cytometry in 50 newly diagnosed AML patients and 23 controls. The expression of CD68 in peripheral blood of 85 newly diagnosed AML patients, 29 remission AML patients and 24 controls was detected by ELISA. The correlation between the expression rate of non-M3 AML bone marrow CD68, peripheral blood CD68 concentration and white blood cell count and other clinical data was compared respectively., Results: The median CD68 expression rate in myeloid leukemia cells of non-M3 AML patients was 19.7%, significantly higher than control (0.2%) (P<0.001). The median concentration of non-M3 CD68 in peripheral blood was 67.97 pg/ml, significantly higher than in control (29.94 pg/ml)（P<0.01）. There was no statistically significant difference in the plasma CD68 concentration of the peripheral blood between the newly diagnosed (45.72 pg/ml) and the remission stage (55.12 pg/ml) of non-M3 AML patients by paired analysis (P>0.05). The results showed that the higher the expression rate of CD68 in bone marrow, the higher the count of white blood cells in peripheral blood, and the lower the count of hemoglobin and platelet in peripheral blood. The higher the plasma concentration of CD68 in peripheral blood, the higher the white blood cell count and the lower the complete remission rate., Conclusion: The expression of CD68 both in bone marrow and peripheral blood of patients with non-M3 AML is higher than that of control group. Patients with high expression of CD68 show a low rate of complete remission, suggesting that the expression level of CD68 is correlated with treatment response.

Objective: To analyze the results of immunophenotyping in patients with acute T-lymphoblastic leukemia (T-ALL) so as to improve the understanding of early T-cell precursor acute T-lymphoblastic leukemia (ETP-ALL) and near ETP-ALL with elevated CD5., Methods: The results of immunophenotypes in 62 patients with newly diagnosed adult T-ALL in our hospital were retrospectively analyzed. According to the expression of CD5, CD1a, CD8 and My/S antigens, the patients were divided into 3 groups: ETP, near ETP and non-ETP. The immunophenotypic characteristics and basic clinical data of three groups were compared and analyzed., Results: There were significant differences in age, white blood cell and plt counts as well as percentage of bone marrow blasts among three groups (P＜0.05). ETP and near ETP mainly belonged to Pro T and pre T, and non-ETP mainly belonged to cortical T and mature T. The positive rates of My/S, CD1a, CD8 and CD5 were significantly different among three groups (P＜0.01). The positive rates of CD4 and CD3 in non-ETP group were significantly higher than those in ETP and near-ETP group (P＜0.01). The positive rate of CD56 in near-ETP group was 50%, which was significantly higher than that in ETP group (16.7%) and non-ETP group (0%) (P＜0.01)., Conclusion: According to the expression of CD5, CD1a, CD8 and My/S antigens, T-ALL patients can be divided into three groups: ETP, near ETP and non ETP, the immunophenotypes and basic clinical data among 3 groups are statistically different.

Objective: To investigate the primary culture technique in vitro, and to evaluate the influence of the prostate donor age and the collagen coating on the primary prostatic cell culture., Methods: Three different methods (enzymic digestive method, tissue culture and enzymic digestive method combined with tissue culture) were investigated in the primary prostatic cell culture, the stromal cell were identified by immunocytochemistry., Results: Compared with the methods of digestion (either with or without tissue culture), tissue culture possessed better cellular adherence and proliferative ability. Thin coating of collagen on culture flask could improve the adherence of cell and promote cell proliferation. Prostate stromal cells from donors aged > or = 60 years old grew slower than those from donors aged < 60 years old., Conclusion: Tissue culture is a simple, convenience method for the primary benign prostatic hyperplasia(BPH) stromal cell culture. Thin coating of collagen in culture flask could improve the primary culture, and prostate stromal cells from donors aged < 60 years old are more suitable for stromal cell culture.

A new method for the determination of trace gold by flame atomic absorption spectrometry (FAAS) after preconcentration with p-dimethylaminobenzylidenerhodanine (DMABR) loaded with nanometer TiO2 was developed. The method is convenient, highly precise and linear in a wide range. Under dynamic condition, the optimum pH of solution, flow rate, elution conditions were obtained for preconcentration of trace gold. And the effect of interfering ions was also investigated. It was found that the studied gold could be quantitatively preconcentrated on loaded nanometer TiO2 at pH = 3.5, and the flow rate of sample solution was 0.6 mL x min(-1), and the flow rate of eluting solution with 0.1 mol x L(-1) HCl-0.5 mol x L(-1) thiourea was 0.5 mL x min(-1), sufficient for complete elution. The dynamic adsorption capacity of gold on load nanometer TiO2 was 23.19 mg x g(-1). The linear range for gold was 0-0.40 microg x mL(-1), correlation coefficient was 0. 999 3, detection limit (3sigma, n = 11) for gold was 2.34 ng x mL(-1), and the relative standard deviation was 2.9% (n = 6, c = 0.10 microg x mL(-1)), the recovery was in the range of 96.7%-101.7%. The method has been applied to the determination of trace gold in water samples with satisfactory results.