Objective To explore the role and mechanism of mitophagy in ventilator-induced lung injury (VILI) in rats.Methods Thirty-six adult Sprague-Dawley (SD) rats were randomly divided into three groups (eachn = 12): spontaneous breathing group (CON group), normal tidal volume (VT) group (NVT group, VT was 8 mL/kg) and high VT group (HVT group, VT was 40 mL/kg). All rats received endotracheal tube by tracheostomy. The rats in CON group were maintained spontaneous breathing, while those in NVT and HVT groups received mechanical ventilation with corresponding VT. After 4 hours of ventilation, the serum, bronchoalveolar lavage fluid (BALF) and lung tissues were harvested. The lung wet/dry weight (W/D) ratio was assessed, and the histopathology changes were observed by light microscopy, and the ultra structure changes in type Ⅱ alveolar epithelial cell (AECⅡ) were observed by electron microscopy. The levels of interleukin (IL-1β and IL-6) and tumor necrosis factor-α (TNF-α) in serum and BALF were determined by enzyme linked immunosorbent assay (ELISA). The total protein in BALF was measured by bicinchoninic acid methods, and the infiltrated cells in BALF were counted. The mRNA expressions and protein levels of microtube associated light chain 3B (LC3B), mitochondrial DNA coded cytochrome C oxidase Ⅳ (COX-Ⅳ) and nuclear factor-κB p65 (NF-κB p65) in lung tissues were determined by real-time fluorescent quantitation reverse transcription-polymerase chain reaction (RT-qPCR) and Western Blot.Results The histopathology of lung tissue and the ultra structure of AEC Ⅱ were normal in CON group and NVT group, and the obvious inflammatory changes and pathological injury were found in HVT group. Compared with CON and NVT groups, the W/D ratio in HVT group was significantly increased (8.53±1.05 vs. 5.12±0.65, 5.57±0.55, bothP < 0.05), and total protein, infiltrated cells, and IL-1β, IL-6 and TNF-α in BALF were significantly increased [total protein (g/L): 2.35±0.45 vs. 1.46±0.34, 1.76±0.51; infiltratedcells (×105/mL): 2.05±0.48 vs. 0.40±0.08, 0.60±0.23; IL-1β (ng/L): 119.82±6.56 vs. 76.15±3.32, 79.39±4.44; IL-6 (μg/L): 4.10±0.52 vs. 1.97±0.40, 2.27±0.36; TNF-α (mg/L): 1.49±0.28 vs. 0.43±0.23, 0.61±0.24; all P < 0.05], IL-1β, IL-6 and TNF-α levels in serum were also elevated [IL-1β (ng/L): 127.53±7.10 vs. 79.40±2.80, 82.95±2.25; IL-6 (μg/L): 6.28±0.82 vs. 2.96±0.35, 3.36±0.72; TNF-α (mg/L): 1.59±0.42 vs. 0.53±0.22, 0.78±0.25; allP < 0.05]. The mRNA expressions and protein levels of LC3B, COX-Ⅳ and NF-κB p65 in lung tissue of HVT group were significantly higher than those of CON group and NVT group, the mRNA expressions of LC3B-Ⅱ, COX-Ⅳ and NF-κB p65 were (3.52±0.90), (3.76±1.16) and (9.54±2.06) folds of those in CON group, and the protein expressions were (1.76±0.24), (1.65±0.20) and (1.91±0.12) folds of those in CON group, with significantly statistical differences (allP < 0.05). There were no significant differences in the parameters mentioned above between NVT group and CON group.Conclusion Mitophagy may be associated with VILI resulting from escaped mitochondrial DNA for activation of inflammation.

Age-related maculadegeneration (AMD) ione of majoretinal diseaseleading to central vision loss.Apresent,the pathogenesiof AMD ibelow understood.Ovethe pasdecade years,dysmetabolism of extracellulamatrix (ECM) regulated by matrix metalloproteinase(MMPs) and tissue inhibitoof metalloproteinase(TIMPs) system play an importanrole in the pathogenesiof AMD.The imbalance of MMPand TIMPleadto differenpathological changeof Bruch 'membrane,which involvein drusen formation and regulatechoroidal neovascularization (CNV).The level of elastin-derived peptides(EDPs) reflectthe level and activity of M MPs,and the elevated level of EDPincreasethe risk of early AMD to advance neovasculaAMD.Thiarticle reviewthe research progression of MMPs,TIMPand the elastin-derived peptideand in AMD.

Objective To identify the effects of virus specific amino acids in the fusion active domains of paramyxovirus fusion proteins on the specific membrane fusion. Methods Site-directed mutagenesis was used to obtain mutants in the identified fusion active domains of Newcastle disease virus (NDV) fusion protein (F) and human parainfluenza virus (hPIV) fusion protein (F). All the mutant F genes were co-expressed with their homol-ogous or heterogenous hemagglutinin-neuraminidase (HN) genes in eukaryocytes. The fusion functions of mutants were assayed by Giemsa staining and reporter gene method. The expression efficiencies of mutants were assayed by fluorescence-activated cell sorter (FACS). Results In the NDV F mutants, N150D-L152D had 46.31% fusion activity of wide type. The fusion activities of N257D-N258D-Q259E, G271D-N272D and Q279E-Q281E almost disappeared, and they had only 1.25%, 3.14% and 2.23% of fusion activities, respectively, compared with wide type. N296D-N297D had 97.68% fusion activity of wide type. In the hPIV F mutants, D143A-E145A had 32.63% fusion activity of wide type. The fusion activity of E223Q-K224A almost disappeared, and it had only 1.91% fusion activity of wide type. K263A-R265A, D268A-D270A and R475A-R476A had 14.63%, 19.52% and 28.95% of fusion activities respectively compared with wild type. The analysis of FACS indicated that proteins of NDV F N257D-N258D-Q259E, G271D-N272D, Q279E-Q281E and hPIV F E223Q-K224A were not expressed on the cell surface, while proteins of the rest mutants were expressed nearly as the same as the wide types. Con-clusion As to NDV F, the amino acids of N257, N258, Q259, G271, N272, Q279 and Q281 were significant to the specific membrane fusion, and N150 and L152 were also important, but N296 and N297 were not. For hPIV F, the amino acids of E223 and K224 were significant to the specific membrane fusion, and D143, E145, K263, 11265, D268, D270, R475 and R476 were also important.

Objective To establish a capillary gas chromatography method for the determination of trinitrotoluene (TNT) in workplace air.Methods Using dichloromethane as the eluent,the air was drawn through a glass fiber filter to collect TNT,TNT was extracted from the filter with dichloromethane by an ultrasonic shaker,and the sample was analyzed by OV-17 elastic quartz electron capture detector capillary gas chromatography.Results Under the optimal condition,the lowest detection limit was 0.006 ?g/ml,the lowest detection concentration was 0.001 3 mg/m~3 (based on 45 L air sample).When the concentration of standard solution was 0.040-2.0 ?g/ml,the linear equation was good,r=0.999 8,RSDs were between 0.66%-3.62%,the recovery rates were 90.4%-95.5%.When sample was collected by fiberglass filter paper,the efficiency of desorption was more than 90%,and was stable for at least 7 days at 2℃-8℃.Conclusion This method is applicable to the determination of trinitrotoluene in workplace air.

Objectives:To observe the efficacy of enteral nutrition with short peptide elemental diet(Pepti 2000) in patients with gastrointestinal fistulas and evaluate the sensitivity of nutrition associated index in nutrition monitoring. Methods:Ten cases with gastrointestinal fistulas were administered total enteral nutrition(TEN).They received 146 kJ/(kg?d) of non protein calorie(NPC) and 0.25 g/(kg?d) of nitrogen per day. Body weight,serum albumin, transferrin(TFN), prealbumin(PA),fibronectin(FN),triglyceride and cholesterol were monitored on before and 7th and 28th after TEN. Results:Seven days after TEN,serum PA and FN levels rised significantly( P

We carried out a dietary investigation of pupils aged 10 - 11 in Mei county in Shaanxi with level-based community random sample method. The result showedthat the average intake of daily food was mainly grain. That of energy was less than 70% of RDA and 60% of WHO. That of the protein was less than 70% of RDA in male and 60% of RDA in female. That of the other nutrients was less than 60% of RDA except iron, nicotinic acid and thiamine. Energy allocation among three mels was not adequate in male pupils. There waas higher energy in breakfast and supper, not sufficent at lunch.

Objective To investigate the significance of measuring carotid arterial intima-media thickness(IMT) and diabetic retinopathy(DR).Methods 76 diabetic patients were divided into three groups:no diabetic retinopathy(NDR),nonpmliferative diabetic retinopathy(NPDR),and proliferative diabetic retinopathy(PDR).20 helath people were chosen as control All subjects were examined by ColorDoppler imaging on the carotid arterial intima-media thickness.Results The mean IMT was significantly higher in T_2DM patients than in normal control group(P

This paper studied the relationship between apolipoprotein E isoforms and hyperlipidemia among 92 cases of diabetes mellitus, 174 cases with impaired glucose tolerance and 124 sex-age-matched controls. The results demonstrated that the patients with abnormal glucose tolerance had higher frequency of E2/3 isoforms and lower frequency of E, / , in com parison with controls. Hyperlipoproteinemia were mainly related to hyperglycemia but the Apo E isoforms which ex pressed different alleles also associated with hyperlipoproteinemia.

Objective To study the effects of three therapies on shoulder pains after gynecological laparoscopies.Methods After the gynecological laparoscopies,180 patients were randomly assigned to hot compress group(n=57),oxygen therapy group (n=65)and routine care group as control group(n=58).All the patients in the three groups were given oxygen inhalation for three hours.Besides,those controls were given mental care,comfort support and massage,while those in the two experiment groups were managed with hot compress on the shoulder and oxygen inhalation via nasal tube at 2 L/min each for 2 hours at 8 am and 4 pm on the first day.The three groups were compared in terms of shoulder pains,at different time points on the first day(at 8 am,4 pm and 8 pm). Results After intervention,there were significant differences between the three groups in terms of shoulder pains(P<0?05).In both experiment groups,the scores on the shoulder pains after intervention were significantly lower than those before intervention(P<0?001). Conclusions Hot compress and oxygen treatment are both effective in relief of the shoulder pain after gynecological laparoscopy. Therefore,the therapy can be decided on economic conditions and postoperative rehabilitations.

Plasma homocystein (Hcy) level and 5,10-methylenetetrahydrofolate reductase (MTHFR) gene polymorphism were investigated in 50 normal subjects, 32 cases of hypothyroidism and 48 cases of hyperthyroidism. As compared with normal group, plasma Hcy level was increased in hypothyroidism group (P