Objective To investigate the interference effect of calcium dobesilate on serum creatinine levels by Sarcosine oxidase-based assay.Methods 1.Interference test in vivo:Ten patients with chronic renal diseases from Huangshi second hosptial were recruited.Serum creatinine (sarcosine oxidase method,Scr1 ; deiminase method,Scr2),urea,and cystatin C were detected and compared before and after one week administration of calcium dobesilate; 2.Interference test in vitro:to detect whether 100 mg/L calcium dobesilate has any interference with Scr1 and Scr2; 3.Dose-dependent interference test:To detect the interference effect of different concentrations of calcium dobesilate (1.25-20.0 mg/L) on different creatinine concentrations (404.5 μmol/L or 65.9 μmoL/L) measured by sarcosine oxidase assay.Bias within 3.5％ or 6.63 μmol/L of creatinine levels was clinically acceptable.Statistical comparisons were made using Wilcoxon rank-sum test.Results There was significant difference of sarcosine oxidase-based serum creatinine levels between before and after one week administration of calcium dobesilate (P ＜ 0.05),while no significant differences were observed for deiminase-based serum creatinine levels,urea and estimated GFR values (P ＞ 0.05).Interference test showed that 95％ confidence interval of interventional value (Dobs) of calcium dobesilate (100 mg/L) was (-173.9 ± 2.86) μmol/L for the sarcosine oxidase assay and (1.21 ± 3.14) μmol/L for deiminase method,indicating that calcium dobesilate caused a significant negative effect on the former enzymatic assay but not the latter one.In the dose effect interference test of calcium dobesilate,the regression equations were:Y =-2.7649X-0.0782 (R2 =0.998,F =7943.4,P =0.000) for high creatinine levels and Y =0.0263X2-1.6394X-0.2754 (R2 =0.996,F =2546.7,P =0.000) for low creatinine levels.The interference effect was less than the predetermined d with the calcium dobesilate concentrations of 4.4 mg/L in high concentration specimen and 3.5 mg/L in low concentration specimen.Conclusions Calcium dobesilate has a significant negative interference with serum creatinine detected by the sarcosine oxidase method,which leads to the bias of creatinine in patients with renal insufficiency.Hence,sarcosine-oxidase-based creatinine levels should be cautious when calcium dobesilate was used,and further check with another assay is necessary if possible.

Objective To explore the protective affect of individual earmuffs in microtia reconstruction using tissue expander.Methods 95 patients performed the implantation of tissue expander had been grouped into the experimental group(49 cases)and the control group(46 cases).Patients in the experimental group wore individual earmuffs,whereas patients in the control group wore traditional earmuffs.The survey including the information of patients' experience in wearing the earmuffs was carried out on the day when patients were given auricular reconstruction.Data collected from the two groups were analyzed to evaluate the aspects of permeability and safety.Results Patients in the experimental group complained less discomfort in sultry in permeability and tinnitus than patients in the control group.From the perspective of safety,there was no complaints of mosquitoes climbing into the earmuffs from the two groups.Because of the good adhesiveness of the individual earmuffs to the skin,the incidence of redness of skin in the experimen tal group was significantly lower than that in the control group.Conclusions Individual earmuff is a safe and comfortable nursing appliance which is practical for clinical application because of its good permeability,adhesiveness and less incidence of redness of skin.

The aim of the present study was to explore the differentially expressed genes in the blood vessel endothelial cells (BVECs) between diffuse large B-cell lymphoma (DLBCL) and reac- tive lymph node hyperplasia (RLNH), and to perform an initial bioinformatics analysis on a novel gene, C20orf14, which is highly expressed in lymph node of lymphoma. The mRNA of the tissue from the BVECs of DLBCL and RLNH tissues was labeled with biotin respectively and hybridized with expression profile microarray, and the differentially expressed genes were obtained. Initial bio- informatics analysis was performed on a novel gene named C20orf14. Its gene structure, genomic lo- calization, the physical and chemical characteristics of the putative protein, subcellular localization, functional domain etc. were predicted, and the systematic evolution analysis was performed on the similar proteins among several species. By using expression profile microarray, many differentially expressed genes were uncovered. The efficient bioinformatics analysis have fundamentally identified that C20orfl4 was a nuclear protein, and may be involved in the post-transcription modification of mRNA. Therefore, microarray is an efficient and high throughout strategy for the detection of differ- entially expressed genes, and C20orf14 is thought to be a potential target for tumor metastasis re- searches by bioinformatics analysis.

OBJECTIVE： To study the effects of ligustrazine on miR-20b/VEGF and BMP2/Smad1 pathways in subchondral bone of knee osteoarthritis （KOA） model rats， and to investigate the mechanism of ligustrazine for KOA prevention and treatment. METHODS： Totally 18 healthy male SD rats were randomly divided into normal control group， model group and ligustrazine group， with 6 rats in each group. The rats in the latter two groups were used to establish KOA model by intra-articular injection of 4％ papain solution. From the 2nd day after the last injection， ligustrazine group was given intragastrical administration of Ligustrazine suspension （100 mg/kg） 2 mL； normal control group and model group were given intragastrical administration of isometrical normal saline， once a day， for consecutive 6 weeks. After the last after medication， the situation of bilateral knee articular cartilage of rats were observed after exposure. The knee joints of rats were sectioned and stained with HE. The pathological change of articular cartilage were observed by microscope and scored by modified Mankin’s score. mRNA expression of VEGF， BMP2 and Smad1， and the expression of miR-20b were detected by RT-PCR； the protein expression of VEGF， BMP2 and Smad1 were detected by Western blot assay. RESULTS： Model group and ligustrazine group suffered from cartilage injury of knee joint at varying degrees. Compared with normal control group， Mankin’s scores of knee joint and cartilage tissue were increased significantly in model group （P＜0.01）； mRNA and protein expression of BMP and Smad1， the expression of miR-20b in subchondral bone of model group were decreased significantly， while mRNA and protein expression of VEGF were increased significantly （P＜0.01）. Compared with model group， Mankin’s score of cartilage tissue were decreased significantly in ligustrazine group （P＜0.01）； mRNA and protein expression of BMP and Smad1， the expression of miR-20b in subchondral bone were increased significantly， while mRNA and protein expression of VEGF were decreased significantly （P＜0.05 or P＜0.01）. CONCLUSIONS： Ligustrazine can repair damaged articular cartilage in KOA model rats， the mechanism of which may be associated with inhibiting the protein expression of VEGF and activating BMP-2/Smad1 signaling pathway via up-regulating the expression of miR-20b， and promoting the degradation of VEGF mRNA in subchondral bone.

OBJECTIVE：To ex plore the protective effects of Longbie capsule contained serum （called“LBJN”for short ）on the apoptosis of chondrocytes induced by YAP inhibitor verteporfin and its mechanism. METHODS ：Primary human knee osteoarthritis（OA）chondrocytes were extracted by two-step enzymatic digestion ，and then identif ied by toluidine blue staining and type Ⅱ collagen immunofluorescence staining. The effects of 2，5 μmol/L verteporfin alone or combined with 5％LBJN on cell apoptosis were detected by flow cytometry. Solvent control （0.1％ DMSO）and 5％ LBJN were set. Western blot assay was adopted to detect the expression of apoptosis related proteins （YAP，Bcl-2，cleaved-caspase-3） after treated with 0.1％DMSO（solvent control ），2 μmol/L verteporfin，2 μmol/L verteporfin+5％LBJN 和 0（blank control ），2.5％ LBJN and 5％ LBJN for 48 h. The expression of autophagy related proteins （mTOR，Beclin-1，LC3A/B） after treated with 0 （blank control ），2.5％，5％ LBJN for 48 h were det ected by Western blot assay. RESULTS ：The isolated cells accorded with the characteristics of chondrocytes. Compared with 0.1％DMSO， the apoptosis rates of cells were increased significantly after treated with 2，5 μmol/L verteporfin（P＜0.05），and the effects of the two concentrations were similar （P＞0.05）. Compared with verteporfin alone ，2，5 μmol/L verteporfin combined with 5％LBJN could significantly decrease the apoptotic rate of cells （P＜0.05）. Compared with 0.1％DMSO，the protein expression of YAP and Bcl-2 were decreased significantly after treated with 2 μ mol/L verteporfin （P＜0.05）， while the protein expression of cleaved-caspase-3 were increased significantly （P＜0.05）. Compared with 2 μmol/L verteporfin，protein expression of YAP and Bcl-2 were increased significantly after treated with 2 μmol/L verteporfin+5％LBJN（P＜0.05），while the protein expression of cleaved-caspase-3 were decreased significantly （P＜0.05）. Compared with blank control ，the protein expression of YAP ，Bcl-2 and Beclin-1 were increased significantly after treated with 2.5％，5％LBJN（P＜0.05），while protein expression of cleaved-caspase- 3 and mTOR were decreased significantly （P＜0.05）. CONCLUSIONS ：LBJN can block the apoptosis of chondrocytes induced by YAP inhibitor verteporfin ，and its mechanism may be related to regulating the expression of apoptosis related proteins and enhancing autophagy of chondrocytes.