Objective To investigate the CT features of pulmonary sarcoidosis.Methods Ninety patients with histologically proved pulmonary sarcoidosis were retrospectively studied by using CT scans and clinical recording.Results The main CT findings of pulmonary sarcoidosis were nodules which were seen in 69 cases(76.7%),and the nodules mostly distributed around the bronchovascular bundle(n=37, 41.1%).Other abnormalities included consolidation(n=31,34.4%),ground-grass(n=39,43.3 %), thickening of bronchovascular bundle(n=30,33.3%),interlobular septal lines(n=58,64.4%), fibrosis(n=17,18.9%)including bronchial distortion(n=8,8.9%),linear shadow(n=5,5.6%), and honeycombing shadow(n=4,4.4%),air-trapping(n=3,5.3%),bronchial straitness(n=8, 8.9%),pleural thickening(n=42,46.7%),and hilar and mediastinal adenopathy(n=76,84.4%). Two or more abnormal findings co-existed in 83 cases.The pulmonary lesions co-existed with hilar and mediastinal adenopathy in 76 cases.The nodules(n=25),consolidation(n=9),ground-grass(n=11), thickening of bronehovascular bundle(n=10)were improved after therapy.Ten cases of the interlobular septal(10/22),0 of bronchial distortion(0/4),1 case of diffuse linear(1/3),and 0 case of honeycombing(0/2)were improved.Conclusion CT manifestations of pulmonary sarcoidosis are varied, but has some specific radiographic features.A correct diagnosis can be made.combined with hilar and mediastinal adenopathy.

Objective To construct the serine protease gene(sprE)mutant and to study the pathogenicity of sprE gene of Enterococcus faecalis.Methods Recombinant suicide vector pCQ001 of Enterococcus faecalis with pTX4577,was constructed.Then,created isogenic sprE-deficient mu- tant(*sprE)by allelic replacement was constructed.Moreover,the growth ability and the virulence of the mutant were compared with those of the wide type in vitro and in vivo respectively.A mouse peritonitis model and a rabbit endocarditis model were utilized in the study.Results The *sprE was selected by kanamycin and identified by polymerase chain reaction(PCR),pulsed field gel electropho- resis(PFGE)and Southern blot.The evidences showed that the sprE gene had a major role in helping bacteria to resist the elevated temperature and oxidative stress.The virulence of mutant decreased af- ter sprE gene was knocked out.Conclusions The *sprE of Enterococcus faecalis is constructed suc- cessfully,sprE gene is important in the pathogenesis of Enterococcus faecalis,which probably is a major virulence factor of Enterococcus faecali.

0.05).But after the treatment,there were significant increases in pa(O2),SaO2 and PCIS(Pa0.05).Conclusions Early application of hyperoxia liquid could decrease multiple organ anoxia and the damage of lipid peroxidation.It has obviously protective effects on multiple organ damage during ischemic reperfusion in infants with muggy syndrome.

Objective To investigate the metabolism change of intestinal flora due to chronic hypoxia in infants. Methods Ten infants with tetralogy of fallot were considered as the chronic hypoxia group,10 healthy infants were regarded as the control group. The urine concen-tration of hippurate in the morning with fasting was detected by 1 H nuclear magnetic resonance. Results The concentration of hippurate was decreased in hypoxia group compared with the control group,(47. 15 ± 32. 88) mg/L vs (346. 698 ± 13. 555) mg/L,with significant differ-ence,P=0. 002. Conclusion Chronic hypoxia alters metabolism of intestinal flora in infants.

The contents of coumarins in the sulfur fumigated Angelicae Dahuricae Radix (Baizhi, ADR) were reduced significantly. To achieve the quality control of ADR, the qualitative identification of sulfur fumigated ADR and quantitative model of imperatorin content should be established. The near-infrared (NIR) spectrograms of non-sulfur and sulfur fumigated ADR were collected by NIR diffuse reflectance spectroscopy technology and pretreated by the method of first derivative derivation and vector normalization. The Ward's Algorithm method was used for the cluster analysis. The non-sulfur and sulfur fumigated ADR can be quickly identified in the range of 8,806. 0-3 811.0 cm(-1) based on the cluster analysis. The NIR quantitative model of imperatorin was established by the contents of imperatorin determined by HPLC in combination with partial least squares regression analysis. According to the calibration model established in this study, correlation coefficients (R2), the root-mean-square error of cross-validation (RMSECV), and the root-mean-square error of prediction (RMSEP) for imperatorin were 0.982 8, 0.006 8, 0.011 8, respectively. The quantitative model of imperatorin can be applied to determine the content of imperatorin in ADR accurately.
Angelica ; chemistry ; classification ; China ; Chromatography, High Pressure Liquid ; Drugs, Chinese Herbal ; chemistry ; Quality Control ; Spectroscopy, Near-Infrared ; methods ; Sulfur ; chemistry

Objective To evaluate the efficacy of intermittent pneumatic compression or sequential compression device in prevention of deep venous thrombosis in long-term bedridden patients.Methods We searched Pubmed (1996～),The Cochrane Library (1997～),CLNAHL (1980～),CNKI (1994～),EM-BASE,Science Direct,Oxford Journals,Wanfang Data(1998 ～),and randomized controlled trials (RCTs) in which IPC or SCD was used as an intervention to prevent DVT,and all the trials were published in English or Chinese.The methodological quality of the included studies was assessed according to the standard of Cochrane systematic review.RevMan 5.0 software was used for Meta-analysis.Results Seven RCTs were included.The results of Meta-analysis showed that the incidence of DVT in the IPC or SCD group was lower than that in the control group.Conclusions IPC or SCD shows an effective tendency in DVT prevention,but because of the low quality and the small sample of the included studies,this conclusion needs to be verified by protocols of more samples and higher quality.

Objective To investigate the risk factors of pulmonary fungal infection in intensive care unit(ICU),and discuss the strategy of prevention and treatment.Methods Forty children with pulmonary fungal infection in ICU of Wuhan Children's Hospital from Jan.2003 to Jan.2007 were analyzed retrospectively,including primarily diseases,application of antibiotics,adrenal cortical hormone and virulence operation,therapy and turnover.Results All children were accepted the therapies of broad spectrum antibiotics and glucocorticoids for long time before definite diagnosis of pulmonary fungal infection.Seventy-five percent children were received invasive operations or therapies.Their average time of stayed in hospital was 37.8 d.The clinical symptoms and imaging examinations were untypical.Blastomyces albicans was the main pathogen.After the antifungal agents and supportive treatment used in time,35 cases(87.5%) were cured and 5 cases(12.5%) died.Conclusions The major risk factors of children pulmonary fungal infection are long-time use of broad spectrum antibiotics and glucocorticoids.The pulmonary fungal infection can decrease by rational use of broad spectrum antibiotics and glucocorticoids,decreasing the unnecessary invasive operations,strengthening the supportive therapies of micro-ecosystem,and applying the antifungal agents in time.

Objective To explore the role ofpostsynaptic density 95 (PSD-95) in Parkinsonian rat models receiving chronic L-dopa treatment. Methods The hemi-parkinsonian rat models were established by stereotaxically injecting 6-hydroxydopamine (6-OHDA) into the right medial forebrain bundle of 60 rats. Thirty-two of them were successfully induced into models with PD and equally randomized into PD group, L-dopa plus physiological saline treatment group, L-dopa plus PSD-95antisense oligonucleotide treatment group and L-dopa plus TE treatment group (n=8). The rats in the PD group were treated intraperitoneally with 0.2% ascorbic acid physiological saline water. The rats in the for 22 d. On the following 3 days, the rats were performed intraperitoneal injection of physiological saline water, injection of PSD-95 antisense oligodeoxynucleotide and TE buffer in the striatum,respectively. Another 8 rats were chosen as normal control group, only given solvent. Rotational reaction time and the largest number of revolutions within 5 minutes of rotation were estimated on the 25th d of injection. After rats being sacrificed, Mrna and protein expressions of PSD-95 at the corpus striatum were observed by RT-PCR and Western blotting, repectively. Results After chronic treatment with L-dopa methylester, the rotational reaction time was prolonged and the the largest number of revolutions within 5 minutes of rotation of PD rats was decreased in the L-dopa plus PSD-95 antisense oligodeoxynucleotide group on the 25th d, as compared with those in the L-dopa plus physiological saline water group and L-dopa plus TE group (P＜0.05). In the lesioned striatum of PD rats, the abundance of PSD-95 Mrna and protein expressions were statistically and evidently reduced as compared with those in the control group (P＜0.05). After chronic treatment of PD rats with L-dopa, the abundance of PSD-95mRNA and protein expressions were statistically and evidently increased as compared with that in the PD group (P＜0.05). Pretreatment with PSD-95 antisense oligodeoxynucleotide statistically and obviously reduced the abundance of PSD-95 protein expression as compared with pretreatment with chronic L-dopa (P＜0.05). Conclusion PSD-95 may play a significant role in the pathogenesis of motor complications of rats with PD receiving chronic L-dopa treatment.

The T-cell immunoglobulin and immunoreceptor tyrosine-based inhibitory motif domain (TIGIT) is an inhibitory receptor mainly expressed on active T-cells, or natural killer cells (NK cells) that activate negative stimulus signals in immune cells by combining with multiple ligands on the surface of target cells including tumor cells and infected cells. TIGIT plays an important regulatory role in the immune pathogenesis of tumors, viral infections and various autoimmune diseases by inhibiting the over activation of cells and the over secretion of proinflammatory cytokines. Recent researches show that TIGIT is highly expressed in T cells and NK cells of cancer patients, and is related to disease progression and poor clinical prognosis. Researchers try to enhance the activity of T cells or NK cells by blocking the binding of TIGIT and its ligand for therapeutic intervention. At present, there have been many reports about the use of anti-TIGIT monoclonal antibody treatment in different mouse tumor models leading to tumor regression, TIGIT has received extensive attention in cancer immunotherapy as a promising target for next generation cancer immunotherapy. Several clinical trials are currently evaluating the efficacy of anti-TIGIT monoclonal antibodies (mAbs) in patients with several cancers. The most advanced candidate, tiragolumab, has exhibited remarkable efficacy in programmed cell death ligand 1 (PD-L1)-positive non-small cell lung carcinoma (NSCLC) patients in phase Ⅱ clinical trials, in combination with PD-L1 blockade. However, the specific mechanism of TIGIT blockade remains to be fully elucidated.

A 2,4 -dichlorophenol degrading Pseudomonas strain GI241-1 was isolated from a soil sample. The dienelactone hydrolase gene, designated as dcpD which encodes dienelactone hydrolase involved in transforming cis-2-chloro-dienelactone into 2-chloromaleylacetic acid, was cloned from this bacterium strain. The gene cloning strategy was to construct genomic library after location of its neighbouring gene by Southem blot and to screen the aim transformant by dot blotting. Sequencing results showed that length of dcpD is 702bp. The sequence of dcpD and the deduced amino acid are different from the relative sequences registered in the GenBank.