Expression and significance of CD64 on monocyte subsets from patients with rheumatoid arthritis / 中国免疫学杂志

Objective:To investigate the expression of CD64 on monocyte subset from patients with rheumatoid arthritis (RA) and its significance and to clarify its role in the development of RA.Methods:The peripheral blood from 44 patients and 22 healthy controls (HC)were collected,the proportions of each monocyte subset and the CD64 expression on monocyte subsets were detected by flow cytometry.The proportions of each monocyte subset and the expression of TIGIT on monocyte subsets were compared between RA patients and HC.The correlations of CD64 expression on monocyte subsets with laboratory index were analyzed.The data were statistically analyzed.Results:(1)The proportion of intermediate monocytes in patients with RA was significantly higher than that in healthy volunteers (P＜0.01),while the proportion of classical and nonclassical monocytes in patients with RA was significantly lower than that in healthy volunteers (P＜0.05).(2) The expression of CD64 (MFI) on monocyte subsets were significantly elevated in RA patients compared to healthy volunteers (P＜0.05).(3)The expression of CD64 on classical monocytes and intermediate monocytes were positively correlated with DAS28 score (rs =0.308,P =0.044;rs =0.302,P =0.049).(4) The expression of CD64 (MFI) on monocyte subsets were positively correlated with ESR and CRP (rs =0.410,P=0.008;rs =0.475,P=0.003;rs =0.448,P=0.003;rs =0.473,P =0.004;rs =0.348,P =0.026;rs =0.340,P =0.042).(5) The expression of CD64 on classical monocytes and intermediate monocytes were significantly increased in patients with positive RF and ACPA respectively (P＜0.05).(6)The RA patients with high levels of CD64 on intermediate monocytes exhibited significantly higher levels of IL-6 compared with the RA patients with low levels of D64 on intermediate monocytes (P＜0.05).Conclusion:In RA,the expression of CD64.on monocyte subsets are elevated,and the expression of CD64 on classical monocytes and intermediate monocytes associated with the inflammatory markers,the production of antibodies and the disease activity.In addition,the expression of CD64 on intermediate monocytes associated with cytokine.

Performance of the microscopic observation drug susceptibility assay in pyrazinamide susceptibility testing for Mycobacterium tuberculosis / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Drug susceptibility assay is very important in tuberculosis therapy. Pyrazinamide is a first line antituberculosis drug and diagnosis of its resistance in Mycobacterium tuberculosis (M. tuberculosis) is difficult and time consuming by conventional methods. In this study, we aimed to evaluate the performance of the microscopic observation drug susceptibility (MODS) assay in the detection of pyrazinamide resistance in M. tuberculosis relative to the conventional Wayne assay and Lowenstein-Jensen (LJ) proportion method.</p><p><b>METHODS</b>M. tuberculosis clinical isolates (n = 132) were tested by the MODS and the Wayne assay: the results were compared with those obtained by the LJ proportion method. Mutations in the gene were identified by direct sequencing of the pncA genes of all isolates in which pyrazinamide resistance was detected by any of the three methods.</p><p><b>RESULTS</b>Compared to the LJ results, the sensitivity and specificity of the MODS assay were 97.8% and 96.5% respectively; the sensitivity and specificity of the Wayne assay were 87.0% and 97.7% respectively. Mutations in the pncA gene were found in 41 of 46 strains that were pyrazinamide resistant (3 tests), in 1 of the 4 strains (LJ only), in 42 of 48 strains (at least 1 test), but no mutations in 1 strain sensitive according to the MODS assay only. The MODS assay, Wayne assay and LJ proportion method provided results in a median time of 6, 7 and 26 days respectively.</p><p><b>CONCLUSIONS</b>MODS assay offers a rapid, simple and reliable method for the detection of pyrazinamide resistance in M. tuberculosis and is an optimal alternative method in resource limited countries.</p>

Expression of microRNA-31 and its clinicopathologic significance in oral squamous cell carcinoma / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the expression of microRNA-31 and its association with clinicopathologic features in oral squamous cell carcinoma (OSCC).</p><p><b>METHODS</b>The expression level of microRNA-31 in 62 cases of OSCC and matched non-tumor adjacent tissue specimens was examined using stem-loop real-time PCR. The relationship between the expression of microRNA-31 and its clinicopathologic features of OSCC was analyzed.</p><p><b>RESULTS</b>The expression of microRNA-31 was significantly higher in the tumor tissues than that in the adjacent tissues (P < 0.05).Up-regulated microRNA-31 expression was associated with the lymph node metastasis (P < 0.05) and cell differentiation (P < 0.05) in OSCC patients.No significant association was found between the expression of microRNA-31 and gender, age, lymph node metastasis, tumor size and location.Receiver operator characteristic curve (ROC) of microRNA-31 about cell differentiation resulted in a diagnostic sensitivity of 70.4% and specificity of 89.5%.</p><p><b>CONCLUSIONS</b>The up-regulated level of microRNA-31 expression may be related to the pathogenesis of OSCC.</p>