Objective To establish the national standard materials for haemiglobincyanide (HiCN) for the traceability assays of hemoglobin. Methods HiCN national standard materials were established according to the document of International Committee for Standardization in Haematology (ICSH). The standard materials were certificated according to ISO Guide 35, including homogeneity and stability. Then they were characterized by the calibrated spectrophotometer which can be traceable to National Institute of Standards and Technology (NIST). The international reference materials of HiCN were compared with the result of the WHO reference laboratory to confirm the reliability. Results The uncertainty of the HiCN standard materials was 0.000 4 g/L and the variation coefficient (CV) was 0.09%. The uncertainty of long-term stability was 0.000 6 g/L; the certificated value of the standard materials was 0.615 9 g/L with uncertainty of 0.000 4 g/L. The combined uncertainty was 0.000 9 g/L and the expanded uncertainty was 0.001 8 g/L when the cover factor was 2. The relative error was 0.08% between the result of the standard materials and the international certificated value. Conclusion The homogeneity and stability of the standard material is acceptable and the method of characterization is accurate and reliable.

Objective To explore the diagnostic value of C‐reactive protein(CRP) for diagnosing chronic obstructive pulmonary disease(COPD) to dig a new marker for COPD diagnosis .Methods A total of 199 cases of COPD ,159 cases of pulmonary malig‐nant tumor and 115 individuals undergoing the physical examination were collected .The whole blood CRP level was detected in 3 groups and the detection results were compared among 3 groups .The receiver operating characteristic(ROC) curve was drawn . Then the sensitivity ,specificity and Youden′s index(YI) were calculated to find the cut‐off value of diagnosis .Results Compared with the individuals undergoing healthy physical examination ,the CRP level in the COPD patients and the patients with pulmonary malignant tumor was significantly increased ,the difference was statistically significant(P<0 .05);the area under ROC curve(AUC) was 0 .768 ,the maximal YI was 0 .418 ,the sensitivity and specificity were 64 .7% and 77 .1% respectively ,the corresponding cut‐off value was 49 .75 mg/L .Conclusion CRP has a certain diagnostic value and can serve as a new index of COPD diagnosis .

Objective: To investigate the role of fibroblast growth factor receptor(FGFR) 1 in endothelial to-mesenchymal transition(EndMT) and epithelial-to-mesenchymal transition(EMT), and to find out a new strategy to study the vascular endothelial function of diabetic renal fibrosis. Methods: Culture media from FRS2 knockdown HMVECs was transferred to HK-2 cells. Western blot and immunofluorescence staining were used to measure EMT markers and key moleculars of transforming growth factor(TGFβ). Results: It was found that the medium from FRS2 siRNA-transfected HMVECs reduced E-cadherin protein levels, increased EMT markers levels, and activated TGFβ signal pathway in HK-2 cells. Conclusion Endothelial FGFR1 deficiency-induced EndMT leads to EMT in neighboring cells in a manner dependent on TGFβ1 signaling. Endothelial cell FGFR1 is an important molecule for maintaining endothelial homeostasis and epithelial homeostasis, and seems to be a key target for anti-diabetic renal fibrosis.

Objective To investigate the diagnostic value of B7-H3 and carcinoembryonic antigen (CEA) on diagnosis of malignant pleural effusion (MPE).Methods We collected and analysed the expression of B7-H3 and CEA in 40 MPE cases and 22 cases of benign pleural effusion (BPE) using enzyme-linked immunosorbent assay (ELISA).Receiver operator characteristic curves (ROC) were drawn according to the expression of B7-H3 and CEA, calculated diagnosis sensitivity, specificity and the area under curve (AUC).Results The diagnosis sensitivity of B7-H3 was 62.5％, specificity 81.0％, with the AUC of 0.777;similarly, The diagnosis sensitivity of CEA was 72.5％, specificity 81.0％, with the AUC of 0.850.Higher AUC of 0.910 was gained in combination ROC, with sensitivity and specificity of 72.5％, 81.0％, respectively.Conclusion B7-H3 and CEA could be available diagnosing markers for MPE.Combined applications of B7-H3 and CEA have higher AUC.They may be widely applied in future clinical practice.