Objective To investigate the serum levels and clinical significances of microRNA-335 (miR-335) and microRNA-155 (miR-155) in patients with primary gallbladder cancer (PCG).Methods A total of 96 PCG patients (PCG group) and 50 healthy controls (control group) admitted to the Second People's Hospital of Hainan Province from January 2016 to October 2018 were selected.Real-time quantitative PCR (RT-PCR) was used to detect the serum levels of miR-335 and miR-155 in each group.The relationships between miR-335 and miR-155 levels and clinical pathological characteristics of PCG patients were analyzed.The diagnostic value of miR-335 and miR-155 in PCG was analyzed by ROC curve.Results The serum level of miR-335 in PCG group was significantly lower than that in the control group (1.50 ± 0.42 vs.3.65 ± 1.18,t =10.319,P ＜0.001).The serum level of miR-155 in PCG group was significantly higher than that in the control group (3.18 ±0.61 vs.0.74±0.12,t =13.627,P＜0.001).The serum levels ofmiR-335 and miR-155 in PCG patients were correlated with TNM stage (t =4.863,P =0.024;t =5.117,P =0.008) and lymph node metastasis (t =5.725,P ＜ 0.001;t =6.802,P ＜ 0.001).ROC curve analysis showed that the critical values of serum miR-335 and miR-155 for diagnosing PCG were 1.18 and 2.35,respectively.The area under the curve of the two combined diagnosis of PCG (0.920,95％ CI:0.863-0.977) was the largest,with sensitivity and specificity of 93.8％ and 85.7％.Conclusion The low serum level of miR-335 and high level of miR-155 are associated with the higher TNM stage and lymph node metastasis of PCG,and the combined detection of the two is helpful to improve the diagnostic rate of PCG.

Objective To investigate the correlation between colony-stimulating activities of serum from patients with severe aplastic anemia (SAA) and their responses to immunosuppressive therapy (IST).Methods The effects in vitro of a total 50 test serum samples from SAA patients before and after IST, and from normal subjects on healthy human marrow colony growth of BFU-E and CFU-GM were examined to reflect their burst promoting activities (BPAs) and granulocyte/macrophage colony-stimulating activities (GM-CSAs). Serum erythropoietin (Epo) level was also measured with ELISA method before and after IST in SAA patients.Results The results showed that the BPAs of sera from SAA patients before IST were higher significantly than that of normal controls (P<0.001), after IST, the BPAs of sera from SAA patients had no obvious changes. Serum GM-CSAs from 13 of 22 SAA patients were normal, and the other 9 patients were extremely lower compared with normal subjects; after IST, their serum GM-CSAs also had no obvious changes. Serum Epo concentrations in SAA patients both at diagnosis and after IST were higher significantly than normal (P<0.001); however, serum concentrations declined in responded patients (P>0.05), while further increased in nonresponded patients (P>0.05).Conclusion Serum GM-CSA of SAA patients was a predictive factor for responsiveness to IST, and a normal value was associated with a good response.