Objective To explore the curative effect and prognosis of traditional Chinese medicine combined with western medicine in the treatment of silicosis patients.Methods 74 patients with silicosis were selected as the research subjects.According to the admission time,the patients were divided into the observation group and the control group,37 patients in each group.The control group was treated with conventional western medicine,the observation group was given the combined treatment of traditional Chinese medicine and western medicine.The clinical curative effect,pulmonary function index,symptoms improved time and the reduce of lung shadow were observed and compared.Results The reduction rate of lung shadow in the observation group was 75.67％,which in the control group was 62.16％,there was statistically significant difference between the two groups (u =2.419,P =0.015).The total effective rate of the observation group was 86.49％,which of the control group was 67.57％,there was statistically significant difference between the two groups (u =2.116,P =0.034).After treatment,the vital capacity (VC),forced vital capacity(FVC) and the first second forced expiratory volume (FEV1) in the observation group were (69.15 ± 18.34)％,(71.08 ± 16.93)％,(68.91 ± 18.75)％,respectively,which in the control group were (63.37 ± 20.53) ％,(63.13 ± 18.69) ％ and (55.47 ± 17.58) ％,respectively,which in the two groups were higher than those before treatment,which in the observation group increased significantly,there were statistically significant differences between the two groups (t =6.778,P =0.000,t =8.836,P =0.000,t =10.133,P =0.000).The wheezing,cough,pulmonary rales and other symptoms improved time in the observation group were shorter than those in the control group,the differences were statistically significant (t =8220,P =0.000,t =6.836,P =0.000,t =6.909,P =0.000).Conclusion Traditional Chinese medicine combined with western medicine in the treatment of silicosis has higher reduction rate of lung shadow,lung function improved significantly,shorter improved time of cough,wheezing and other symptoms,its curative effect is better than western medicine.

Objective: To establish the quality standards for Pugan Tablets. Methods: Two main components, acetaminophen and chlorpheniramine maleate in Pugan Tablets were identified by physico chemical methods and TLC, and determined by ist derivative spectrography directly and TLC scanning, respectively. Results: The average recoveries were 98.23% (RSD was 1.38%, n was 9) for acetamnophen and 98.83% (RSD was 1.78%, n was 5) for chlorpheniramine maleate. Conclusion: These methods are simple and feasible with good results, and can be used for the quality control of the tablet.

ObJective To locate the cysteine-rich domains(CRD) of murine 4-1BB binding to its natural ligand. Methods A serial soluble extracellular CRDs of routine 4-1BB and 4-1BBL fusion proteins was constructed and prepared. The binding of purified 4-1BB-Igs to 4-1BBL and 4-1BB monoclonal antibody were tested using ELISA assay and Western blot analysis. Blocking experiment with 4-1BBL and 4-1BB mon-oclonal antibody was performed by ELISA assay. Results All truncated overlapped proteins containing ex-tracellular CRD Ⅱ of murine 4-1BB were able to bind to 4-1BBL by ELISA assay, excepting the CRD Ⅰ do-main alone. A 4-1BB monoclonal antibody proved to block the interaction of 4-1BB and 4-1BBI, was also able to bind to CRD Ⅱ. Conclusion Murine 4-1BBL whose specificity was mapped to CRD Ⅱ of 4-1BB ex-tracellular region with a possible conformational structure.

Objective To determine whether regulatory T cells(Tr)are increased in patients with tuberculosis and whether they are associated with its immunopathology.Meantime,to investigate the possibility of tuberculosis(TB)as a model for studying Tr functions.Methods The lymphocyte subsets were isolated from peripheral blood mononuclear cells by sorting with flow cytometry.Total cellular RNA was extracted and RT-PCR was performed to detect the Foxp3 mRNA in purified CD3+CIM+T cells,CD3+CD8+T cells and non-CD3+CD4+CD8+T cells.Using FACS analysis.we further investigated the distribution of Foxp3+ population in CD4+ CD25+T cells.Finally,we compared the percentage of CD4+CD25highFoxp3+T cells present in 51 active patients with tuberculosis and 40 uninfected healthy control subjects by FACS.The detection of Tr infiltration of Foxp3+ cells were performed with immunohistochemistry(IHC)method on tuberculosis pathological sections.Results Foxp3 was specific expressed in CD3+CD4+T cells,either in tuberculosis patients or healthy control subjects.Foxp3+ T cells took about 85%fraction of CD4+ CD25highpopulation.We used CD4+CD25high Foxp3+as a detective markers for Tr in the FACS analysis.The results showed that patients with active TB had a 4.4 fold higher percentage within the CD4+T cells in peripheral blood compared to healthy control group(modian,1.01%vs 0.23%,P<0.01).Much higher frequency of Tr were found along with T cells infiltration at the tuberculosis pathological tissues.A few individuals that we can followed indicated the expanded Tr was declined after curative treatment with operation.Conclusion Tr cells are increased in tuberculosis patients and closely correlate with its immunopathology.Tuberculosis should be a valuable model for Tr functional study.

Objectives: To evaluate the effect and safety of 14-day continuous subcutaneous insulin infusion (CSII) in type 2 diabetes patients with heart diseases.
Methods: A total of 22 consecutive type 2 diabetes patients (history ≤ 5 years) with heart diseases treated in our hospital from 2011-03 to 2013-08 were studied. There were 20 male, and the with the mean age of patieuts (48.15 ± 9.80) years, all patients without standard hypoglycemic treatment before admission. The patients received 14-day CSII for enhanced treatment and the blood glucose level, insulin function and insulin sensitivity were compared before and after the treatment.
Results: After CSII treatment, the blood glucose level was obviously decreased, fasting blood glucose (FBG) and postprandial blood glucose at 30, 60 and 120 min were improved, all P<0.001. The C peptide level was higher at 60 and 120 min alter treatweut as 2.73 (1.05-7.05)ng/ml vs 3.84 (1.22-63.39)ng/ml, P=0.004 and 3.34 (1.42-9.61)ng/ml vs 6.27 (0.93-47.39)ng/ml, P=0.004. The insulin sensitivity was improved as -1.89 ± 0.29 vs -1.70±0.31, P=0.008. With CSII treatment, there were 22.73% patients (5/22) at remission by controlling the diet and excise and 77.27% (17/22) with continuing medication. The patients were followed-up for (12.4 ± 8.5) months, there were 4/5 patients with euglycemia, 1/5 with increase blood sugar and received medication at 2 months after discharge, the rest 17 patients remained oral hypoglycemic medication.
Conclusion: CSII may quickly relieve glucotoxicity and improve insulin sensitivity in type 2 diabetes patients with heart diseases. Some patients may alleviate drug burden in clinical practice.

BACKGROUNDIt was reported that tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) was a powerful pulmonary carcinogen, predominantly inducing adenocarcinoma of the lung in mouse. The aim of this study is to assay metabolites of NNK, which are 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL) and its O-glucuronide (NNAL-Gluc), and their ratio (NNAL-Gluc/NNAL) in smokers and non-smokers' urine, and to explore the carcinogenicity of NNK among different people.

METHODSUsing high pressure liquid chromatograph (HPLC) and gas chromatograph-mass tadom (GC-MS/MS), NNAL-Gluc and NNAL in 24h urine were detected in 8 healthy smokers, 10 lung cancer smokers and 4 healthy non-smokers.

RESULTSBoth of the two metabolites were not found in non-smokers' urine. The ratios of urine NNAL-Gluc/NNAL were greatly different among different smokers. The mean ratio of NNAL-Gluc/NNAL in healthy smokers was 4.95, and 0.5 in lung cancer smokers.

CONCLUSIONSThe results provide the first evidence for metabolite detection of tobacco-specific nitrosamine in Chinese smokers' urine . The result suggests that detoxification ability of healthy smokers is higher than that of lung cancer smokers. It may provide a detective way to screen high risk people for lung cancer in smokers.

Objective:To construct an expression system of lentivirus vector encoding epidermal growth factor receptor-specific chimeric antigen receptor (EGFR-CAR) and programmed cell death ligand-1 (PD-L1) antibody.Methods:Human PD-L1-Fc protein was used to immunize BALB/c mice. Cell-fusion and subcloning were performed to screen stable hybridoma strains with high secretion of PD-L1-specific antibodies, which were identified by both ELISA and Western blot. The activity of the antibodies in blocking the binding of programmed cell death-1 (PD-1) to PD-L1 was determined by fluorescence-activated cell sorting (FACS). Antibody affinity was analyzed by Fortebio Octet96. A single-chain variable fragment (scFv) was further constructed after antibody full-length sequencing and humanization using CDR grafting method. Meanwhile, the genes encoding the light and heavy chain variable regions (VL and VH) were cloned from a hybridoma secreting antibody against human EGFR by 5′ RACE technology to construct scFv gene. The expression of scFv was confirmed using pcDNA3.1 vector. EGFR-CAR containing CD137 intracellular function domain and PD-L1-scFv was ligated using 2A gene. The synthetic single molecule was cloned into pLVX-EF1a-IRES-ZsGreen1 lentivirus expression vector, and then transfected into 293T cells using Lenti-X Packaging Single Shots (VSV-G) to prepare infectious virus. Expression of CAR on cell surface and the soluble form of PD-L1-scFv in the supernatant of transfected 293V cells were detected by FACS and ELISA.Results:A PD-L1 antibody named 11E3 with high ligand-receptor blocking performance was obtained. The humanized antibody showed a stable affinity (2.67×10 -10 mol/L) after directly grafting the mouse CDRs (CDR1, CDR2 and CDR3) to human frameworks. EGFR-scFv was effectively expressed in a form of Fc-fusion. Secretory CAR (CTZ0431-1) and membrane CAR (CTZ0431-2) expression plasmids were constructed using lentivirus vector containing EGFR-CAR and PD-L1-scFv. The infection efficiency in 293V cells was around 10%. EGFR-scFv on the cell membranes and PD-L1-scfv in the culture supernatants were detected after 293V cells were infected with CTZ0431-1. EGFR-scFv and PD-L1-scfv were expressed on the cell membranes of 293V cells infected with CTZ0431-2. The expression rate of CAR in LV-CART46407-1-transfected activated T cells was 39.3%. Conclusions:The lentivirus vectors co-expressing EGFR-CAR with moderate binding affinity and PD-L1-scFv with high binding affinity were successful constructed, which provided an essential tool for investing EGFR- and PD-L1 double targeted CAR-T cell therapy against solid tumor.

Objective To establish a human lung cancer cell line that can stably express firefly luciferase (Fluc) and red fluorescent protein (RFP) gene so as to lay the foundation for the further establishment of a live-imaging lung cancer xenograft model in nude mice and therapeutic research.Methods The lentiviral vector pHBLV-FlucRFP containing luciferase and red fluorescent protein was constructed and then transfected into 293T cells for virus packaging.The complete virus was used to infect human lung cancer cell lines A549,H1975 and human B-cell lymphoma cell line K562.The stable cell lines were obtained by puromycin selection.Fluorescence microscopy and quantitative PCR were used to confirm the RFP and Fluc expression.Results The lentiviral vector pHBLV-FlucRFP was successfully constructed.Cancer cell line A549,H1975 and K562 stably expressing Fluc and RFP was obtained.The real-time quantitative PCR results showed that the relative expression of Fluc gene in the three stable infected cells was much higher than that in the corresponding wild-type cells,and the differences were statistically significant(all P＜0.05).Conclusion The human lung cancer cell line A549,H1975 and human B-cell lymphoma cell line K562 with dual expression of RFP and Fluc were obtained,which provided a new model of fluorescent cells for in vivo imaging of immunodeficient mouse models such as nude mice.

Objective:To investigate the long-term effects of metabolically healthy obesity on the risks of type 2 diabetes, cardiovascular disease events, and its mortality over a 23-year follow-up.Methods:Based on the results of an oral glucose tolerance test, there were 519 participants with normal glucose tolerance and 630 with newly diagnosed type 2 diabetes enrolled in 1986 and then given to assess the long-term clinical outcomes during the 23-year follow-up in Daqing. Metabolically healthy obesity was defined as the overweight and obese individuals with no metabolic abnormalities (diabetes, hypertension, hyperlipidemia). Finally, we identified 682 participants (350 with normal glucose tolerance and 332 with newly diagnosed diabetes). They were divided into five groups: 211 individuals with metabolically healthy normal weight (MHNW group), 58 with metabolically healthy overweight and obesity (MHO group), 81, 109, 223 were metabolically unhealthy overweight and obesity with hypertension (MUHO group), type 2 diabetes (MUDO group), hypertension and diabetes (MUHDO group). Incidences of type 2 diabetes, morbidity and mortality of cardiovascular disease were compared among these groups.Results:Over 23 years, instead of the morbidity and mortality of cardiovascular disease, the incidence of type 2 diabetes in MHO group was two times higher than in MHNW group ( 24.1%, 12.5/1 000 person years vs 10.9%, 5.2/1 000 person years, P=0.01), with an age, sex, and smoking history-adjusted hazard ratio ( HR) of 2.42 (95% CI 1.24-4.74, P=0.01). The morbidity and mortality of cardiovascular disease in the groups of overweight and obesity with metabolically unhealthy were higher than in MHNW group, and increased across the subjects with MUHO, MUDO, MUHDO ( P<0.05). Conclusion:Compared with metabolically healthy normal weight participants, the metabolically healthy obese group was at increased risk of type 2 diabetes but not cardiovascular disease events and its mortality. On the contrary, the overweight and obese groups with metabolic abnormalities had significant higher incidence of type 2 diabetes, morbidity and mortality of cardiovascular diseases.