No abstract available.
Salivary Glands*

Objective To study on the cross-cultural adjustment and application of the Death Anxiety Scale based on the national culture and establish the Chinese version of this scale.Methods Through cross-cultural adaptation and formal investigation,the Chinese version of Death Anxiety Scale was established.A cross-sectional study was conducted among 450 medical college students and 50 hospice workers with multiple diagnoses to validate the Chinese version of the Templer's Death Anxiety Scale (T-DAS),after 7to 10 days,60 of them were retested.Reliability and validity of the Chinese version of Templer's Death Anxiety Scale (T-DAS)were evaluated according to the data.Results The Chinese version of the Templer's Death Anxiety Scale(T-DAS)was easy to understand.Most respondents finished the whole scale in 5 to10 minutes,and the effective recover rate of the scale was 97.4％.The correlation between the T-DAS and the single item test for the death anxiety was 0.516.Structural equation models and factor analysis displayed good construction of the T-DAS.The internal consistency reliability evaluated by Cronbach'α was 0.71 for the whole 15 items.The retest reliability was 0.831.Conclusions Based on the analysis,the Chinese version of the T-DAS has good reliability and validity,and should be a good instrument for the evaluation of the death anxiety.

Objective To study on the activity of intestinal mucosal mast cells (IMMC) in dextran sulfate sodium ( DSS) induced colitis of rats. Methods Acute colitis was induced by giving 3% DSS orally. Eighteen male rats were randomized into DSS group ( n = 10 ) and normal control group ( n = 8). The rats in DSS control group drank 3% DSS solution from day 1 to day 7; those in normal control group drank water at random. Diarrhea and bloody stool as well as colonic histology were observed. The levels of colonic tissue histamine, tumor necrosis factor-a (TNF-a) and Prostaglandin E2 ( PGE2) determined with fluorimetry and ELISA, and the expression of IMMC in colonic tissue was detected by histochemical stain method. Results Compared with normal control group, the inflammatory symptoms and histologjcal damages of colonic mucosa in DSS group were significantly presented. The level of histamine in colonic tissue was significantly reduced (P

To study the expression of human telomerase RNA(hTR) in different grades of bladder transitional cell carcinoma and its relation to its prognosis. With in situ hybridization, the expression of hTR was observed in 67 cases of bladder transitional cell carcinoma specimens, to be compared with specimens of 10 normal bladder tissue and 10 benign lesions. The RNA probe used in hybridization was telomerase reverse transcript (TERT), and the marker was digoxin. There was a significent correlation between the expression of hTR and grading and prognosis. hTR is considered as an important and independent prognostic factor in this carcinoma.

Abstract: Objective　To collect extensively drug-resistant tuberculosis (XDR-TB) Mycobacterium tuberculosis strains isolated from Xi'an City between 2019 and 2020, and analyze the drug resistance patterns of XDR-TB strains to second-line anti-tuberculosis drugs and the occurrence of new defined extensively drug-resistant tuberculosis in Xi'an, in order to provide evidence for guiding clinical drug use of multidrug-resistant tuberculosis (MDR-TB) patients. Methods A total of 3 088 strains of Mycobacterium tuberculosis that underwent phenotypic drug susceptibility testing at Xi'an Chest Hospital from January 2019 to December 2020 were retrospectively selected to analyze the resistance of anti-tuberculosis drug. Among the stored MDR-TB strains, 114 strains of preserved multidrug-resistant Mycobacterium tuberculosis were randomly selected for bedaquiline and linezolid susceptibility testing. Combined with the results of previous second-line drug susceptibility testing, the incidence of newly defined extensive drug resistance was analyzed. Results Among the 3 088 Mycobacterium tuberculosis strains analyzed, 411 strains (14.3%) showed resistance to isoniazid, 347 strains (11.2%) showed resistance to rifampicin, 142 strains (4.6%) showed resistance to ethambutol, 550 strains (17.8%) showed resistance to streptomycin, and 237 strains (7.6%) exhibited multidrug resistance. Of 237 MDR-TB strains, the resistance rates of ethambutol, moxifloxacin, rifampicin, sodium para-aminosalicylate, prothioconazole, capreomycin, amikacin, and clofazimine were 44.3%, 26.6%, 33.3%, 24.1%, 5.1%, 4.2%, 3.0%, and 2.5%, respectively. Among the randomly selected 114 MDR-TB strains, none showed resistance to bedaquiline, three showed resistance to linezolid, and one strain met the new definition for extensively drug-resistant tuberculosis. Conclusion In Xi'an City, high rates of resistance among MDR-TB strains are observed for ethambutol, quinolone and sodium para-aminosalicylate, and the drug susceptibility tests should be obtained as much as possible when using these drugs. The incidence of new definition extensively drug-resistant tuberculosis is low, and bedaquiline and linezolid remain effective drugs for the treatment of multidrug-resistant tuberculosis even without drug susceptibility testing results.

BACKGROUND: We can investigate mechanism of endogenous neuroprotection in rat cerebral hypoxic tolerance trial. OBJECTIVE: To observe the characteristics of cerebral hypoxic tolerance in rat models with cerebral hypoxic preconditioning. DESIGN: Randomized controlled observation. SETTING: Department of Neurology, China-Japanese Friendship Hospital, Jilin University. MATERIALS: The experiment was performed in the Basic Animal Experimental Center, China-Japan Friendship Hospital, Jilin University from April 2003 to April 2004. Inbred line healthy Wistar rats, of either sex, with the body mass of 200-300 g, were randomly assigned into normal control group (n=6), sham operation group (n=6), ischemic control group (n=20), hypoxic preconditioning (3 hours, 8% O2 and 92% N2) plus ischemic group (n=60) (according to different hypoxic phases, there were 5 time phases: 30 minutes, 1, 3, 5 and 6 hours with 12 rats in each time phase), hypoxic preconditioning group (n=18) [according to different hypoxic phases, there were 3 time phases: 1, 3 and 5 hours with 6 rats in each time phase, 3 rats received TTC staining and 3 rats received hematoxylin and eosin (HE) staining]. METHODS: ①Hypoxic preconditioning: Firstly, natrica calx was put into closed glass container to absorb CO2 and O2, secondly, mixed gas of 8% O2 and 92% N2 was input, and then animals were put into the container, 3 rats each time. Temperature and humidity were kept steadily. ②Permanent ischemic middle cerebral artery rat models were established. ③The models were determined with a series in procedures: neurological score, infarcted volume evaluation, pathological sample preparation, immunohistochemical staining, imaging analysis and so on. ④The data were compared in groups with variance analysis.MAIN OUTCOME MEASURES: Changes in cerebral infarcted volume, neurological score and pathological morphology in rats of experimental group and control group. RESULTS: Neurological score in the hypoxic preconditioning (8% O2, at hours 1, 3 and 5) plus ischemic group was lower than in the ischemic control group(P＜0.01). Neurological score at minute 30 and hour 6 after hypoxia (8% O2) had insignificant difference in the ischemic control group. Mean cerebral infarcted volume ratio in the hypoxic preconditioning (8% O2, at hours 1, 3 and 5) plus ischemic group was lower than in the ischemic control group(P＜0.01). Mean cerebral infarcted volume ratio after hypoxia (8% O2, at minute 30 and hour 6) had insignificant difference with ischemic control group (P＞0.05). CONCLUSION: Hypoxic preconditioning in rats can effectively release nerve injury induced by focal cerebral ischemia, suggesting that it has protective effect on brain. The procedure of establishing cerebral ischemic tolerance models with hypoxic preconditioning, which is simple and stable, with little injury on experimental animals, is a useful tool for studying cerebral ischemic tolerance.

Object To study the effects of WUZI SIWU GUASHITANG (WT) against multi glycosides of Tripterygium wilfordii Hook. f. (GTW) induced genital system toxicity in male rats and its mechanism. Methods Male rats in treatment groups were treated respectively with a 80 days oral administration of large , middle and small doses of WT plus a fixed dose of GTW. The rats as control were treated with GTW alone or saline. Thereafter, the changes in testis organ index, the number of spermatozoa, the rate of movable spermatozoa and the structure of spermatogenic cell epithlium were observed and the serum testosterone level was determined by IRMA. Then the comparison was made between treatment and control groups as to above variables. Results As compared with GTW group, large or middle dose of WT significantly increased the weight of testis, the number of spermatozoa and the rate of movable spermatozoa. Large dose of WT could relieve the damage of GTW to the spermatogenic cell epithelium completely and keep the serum testosterone at normal level. Conclusion The combined use of GTW with WT is very useful in relief of GTW induced adverse reactions of genital system in male rats. The mechanism by which WT exerts the counteractive effects is related to protecting the spermatogenic cell epithelium from being damaged by GTW, and keeping the serum testosterone at normal level.

Objective To evaluate the predictive value of diffusion weighted imaging ( DWI) for progres-sion free survival(PFS)in patients with cervix cancer after neoadjuvant chemotherapy (NACT).Methods Thirty two consecutive patients with pathologically confirmed cervical cancer underwent MRI including DWI before and after NACT.Pathologic results and MR images were reviewed .Univariate analysis was applied by Kaplan -Meier method.The Cox proportional hazard model was used to evaluate prognostic variables for multivariate analysis .Re-ceiver operating characteristic ( ROC) curves were used to find optimal cutoff values of independent prognostic fac -tors for disease progression.Results Of 32 patients,10 had disease progression during follow -up period.In uni-variate analysis,FIGO stage,tumor size,the depth of tumor invasion,lymph node metastasis and ADC changes be-tween before and after neoadjuvant chemotherapy (ΔADC) were significantly associated with the disease progres-sion.In multivariate analysis , FIGO stage and ΔADC were the independent prognostic factors for PFS .Optimal cutoff values that determined by ROC curves analyses were FIGO stage ⅡandΔADC 0.31.Area under the ROC curve(AUC)of FIGO stage and ΔADC were 0.841(sensitivity 90.0%,specificity 68.2%)and 0.864(sensitivity 80.0%,specificity 81.8%),respectively.Conclusion In patients with cervix cancer after NACT ,FIGO stage andΔADC are significant predictive values for PFS .

High flow nasal cannula oxygen therapy (HFNC) is a new type of oxygen therapy. Because of its unique physiological effects, the clinical application is becoming more and more popular. The article summarized HFNC has obvious advantages in oxygenation and comfort. In the clinical, HFNC is widely used in adult patients with acute hypoxemic respiratory failure, respiratory failure after the operation or extubation and respiratory tract invasive operation. But there is no literature reports in improving ventilation to reduce carbon dioxide. If patients′ respiratory, cycle and oxygenation show no significant improvement after application of HFNC for a short time, it should be replaced as soon as possible for the noninvasive and invasive mechanical ventilation. In this article, the characteristic and application of HFNC will be reviewed.

BACKGROUND:Tissue engineering scaffolds can create proper nerve regeneration microenvironment, enrich nutritional factors for nerve regeneration and promote axonal growth. OBJECTIVE:To review the progress of tissue engineering scaffolds in nerve repair in recent years. METHODS:A computer-based retrieval was performed to search ful-text articles addressing tissue engineering scaffolds used to repair nerve damage published from 2009 to 2014 in PubMed databases using the keywords of “nerve regeneration, prostheses and implants” as wel as articles published from 2004 to 2014 in CNKI database using the keywords of “nerve repair, material” in Chinese. RESULTS AND CONCLUSION: Currently, scaffold materials for nerve damage mainly include natural materials, naturaly derived materials, synthetic materials and composites, al of which have their own advantages and disadvantages. By chemical crosslinkers or chemical modification, the naturaly derived polymer can be combined with other natural or synthetic composite materials, to improve their physicochemical and biological properties, i.e., the composite scaffolds have better effects than single materials in nerve regeneration. Therefore the current research focus is composite materials. In clinical research, colagen scaffold for nerve repair has entered the clinical research stage.