Objective:To analyze the clinical application of navigation bronchoscopy system, and improve the accuracy during routine use.Methods:Through discussing ENB, System composition, clinical application and environment, the paper presents the clinical application standard and working environment standard of the navigation bronchoscopy system.Results:Electromagnetic navigation bronchoscopy(ENB) combined with the advantages of electromagnetic technology, virtual bronchoscopy and 3D CT reconstruction, which can perform the accurate localization of peripheral pulmonary lesion and mediastinal lymph node to acquire tissue samples for pathological diagnosis. ENB-guided localization can be used in interventional therapy(local injection or radioactive seed implantation).Conclusion:Navigation bronchoscopy system shows the merit of minimally invasive technique and medical visualization. It is a great progress in interventional pulmonology history.

Objective To systematically observe the damage of pancreas and changes of serum amy-lase and lipase in septic rat at different time points after the septic rat model being established. Methods Fifty-four male rats were randomly divided into sham group,sepsis group and normal control group. In the sepsis group,rats were given cecal ligation and puncture so as to produce a model of the rat′s intestinal septic shock. In sham group,after opening the abdominal cavity of the rats,only the cecum was pulled out of the abdominal cavity,then the abdominal cavity was satisfied and stitched. The arterial blood and pancreatic tis-sues of the rats in both sepsis and sham groups were collected for detection of serum amylase and lipase and observation of damage of pancreas by light and electron microscopy at 3 h,6 h,12 h,24 h after the model be-ing established. Results The levels of serum amylase of sepsis group showed a rising trend over time,and peaked at 24 h(2 779. 83 U/L), which showed no difference among 4 time points. There was no significant difference of serum amylase among 3 groups at each time point except for 12 h value. The levels of serum li-pase in both sepsis and sham group were higher than that in normal control group at 3 h(P<0. 05),while de-creased to the level of normal control group at 24 h. By light microscope,pathological changes of pancreas in the sham groups were that lobule was slightly widened; mild interstitial edema,vasodilation and a little in-flammatory cell infiltration were occasionally found;most of the lobular structure was complete. In the sepsis group,pancreatic pathological changes aggravated with time prolonged. Pancreatic lobules gap widened,inter-stitial were infiltrated by the inflammatory cell,flocculus brim structure was fuzzy,focal necrosis was found occasionally,islet structure was complete at 3 h. Pancreatic lobule was significantly wider,more inflammatory cell infiltrated,necrosis enlarged at 6 h,and pancreatic lobule was obvious edema,more inflammatory cell in-filtration and focal necrosis were found at 12 h. Vascular of pancreatic lobule was dilatation and congestion, pancreatic lobule and islet edge blurred,more lobular necrosis at 24 h. The modified Schmidt scoring of sham group and sepsis group at 3 h,6 h,12 h,24 h were 2. 0,3. 6,3. 4,3. 6 and 4. 6,6. 0,6. 8,7. 6,respectively. By transmission electron microscope,the ultrastructure of pancreatic cell in sham group was normal,mitochondri-al and lysosomal swelling were found occasionally. When in the sepsis group,the nucleus was normal,some mitochondria was swelling and cracking, lysosomes was swelling at 3 h, nucleus was complete, a part of swelling mitochondria and lysosomes appeared vacuolated necrosis at 6 h,and karyopyknosis and chromatin condensation were found,more mitochondria and lysosomes were swelling necrosis and vacuolar degenerated, rough endoplasmic reticulum was swelling at 12 h,cell karyopyknosis and chromatin condensation were obvi-ous,a large number of mitochondria and lysosome, endoplasmic reticulum were swelling, dilatation and vacuolar necrosis at 24 h. The modified Schmidt scoring showed no significant correlation with the levels of serum amylase and lipase in sepsis group(r=0. 472,P=0. 199;r=0. 260,P=0. 499). Conclusion The pancreas was damaged in the septic rat. The pathological changes of pancreas were obvious at 6 h after sepsis onset. The characteristics of the pancreas ultrastructure change includes the changes of the mitochondria and lysosome in the early period,clear vacuoles necrosis of mitochondria and lysosome,and destruction of nucleus and the endoplasmic reticulum. There is no significant correlation between pancreatic pathological changes and serum amylase as well as lipase,serum amylase and lipase can′t indicate the extent of pancreas damage in sepsis.

Objective To explore the relationship between cerebrovascular steno-occlusive disease and neuropsychological performance by cognitive function assessment.Methods Using a case-control study,45 patients with cerebrovascular steno-occlusive lesions (patient group) and 59 control subjects without cerebrovascular steno-occlusive disease were included,36 simple hypertension (hypertension group)and 34 simple diabetes mellitus subjects (diabetes mellitus group) without cerebrovascular steno-occlusive disease were also included.A battery of neuropsychological was performed in all subjects.The test battery included tests of memory,executive functions,mental speed,visuospatial ability and visuoconstructive skill,anxietas and depression.Results Patient group showed impairments in multiple cognitive domains compared with other three groups.The immediate recall of auditory verbal learning test (controls 56.8 ± 6.5 ;patient group 48.5 ± 10.1 ;hypertension group 53.5 ±9.0 ;diabetes mellitus group 55.9 ± 7.9;t =-3.57-4.822,P =0.000-0.021) were impaired seriously.Moreover,visual memory Modified Rey-Osterrieth Complex Figure Test immediate recall,long time delayed recall and executive function California cards sorting test were also impaired.Patient group was divided into two subgroups,and neuropsychological tests of these subgroups were compared.Multiple stenosis subgroup had significantly worse performance in tests of verbal memory and some executive functions than the single artery stenosis subgroup.Conclusions Cerebrovascular steno-occlusive disease was associated with poorer neuropsychological performance,which could not be explained by vascular risk factors.Multiple stenosis subgroup had lower performance levels in neuropsychological tests than simple stenosis subgroup.Ischemia or hypoperfusion caused by steno-occlusive disease might be responsible for these cognitive impairments.

AIM: To investigate the correlation of hepatitis B virus X protein (HBx) with renal tubular epithelialcell apoptosis in hepatitis B virus-associated glomerulonephritis (HBVGN) and the possible signaling mechanism. METHODS: The activation of JAK2/STAT3 signal pathway and the expression of apoptosis -related proteins in humankindey proximal tubular epithelial cells (HK-2 cells) were determined by Western blotting after transfection with HBx eukaryoticexpression vector.The cell proliferation was observed by CCK-8 assay.The cell apoptosis was analyzed by the imagingof HO33342 staining, transmission electron microscopy and flow cytometry with Annexin V /PI double staining.RESULTS:After transfection of the target gene HBx, the expression levels of both p-JAK2 and p-STAT3 were significantly increased.At the same time, the cell proliferation was obviously inhibited, and the apoptotic rate was increased.After incubationwith AG490, the JAK2/STAT3 signal pathway was partially blocked, and the cell apoptosis induced by HBx was reduced. CONCLUSION: HBx up-regulates the activation of JAK2/STAT3 signal pathway to induce renal tubular epithelialcell apoptosis, which is possibly involved in the pathogenic mechanism that HBV directly damages nephridial tissue .

Objective: To investigate the difference in influencing factors for diabetes between urban and rural residents in Hefei City, so as to provide the basis for control and research of diabetes. Methods: The residents aged 18 years and older were selected using the stratified multistage random sampling method from 5 districts (counties) in Hefei City from August to December 2021. Demographic information, smoking, self-rated health status and sleep duration were collected through questionnaire surveys. Height, body weight and fasting blood glucose were measured. The crude prevalence of diabetes was calculated and standardized by age using China Statistical Yearbook 2022. Factors affecting diabetes were identified using a multivariable logistic regression model. Results: Totally 10 443 residents were investigated, including 6 386 urban residents (61.15%) and 4 057 rural residents (38.85%). There were 4 690 males (44.91%) and 5 753 females (55.09%). Diabetes were detected in 1 492 cases, with a standardized prevalence of 9.57%. The standardized prevalence of diabetes among urban and rural residents were 9.21% and 12.58%, respectively, and the difference was statistically significant (P<0.05). Multivariable logistic regression analysis showed that region, age, educational level, occupation, body mass index and self-rated health status were influencing factors for diabetes. Further analysis stratified by urban and rural area showed that, in addition to the above factors, gender and smoking were influencing factors for diabetes among urban residents, while sleep duration was the influencing factor for diabetes among rural residents (all P<0.05). Conclusions There are urban-rural differences in the prevalence of diabetes among residents in Hefei City, and the prevalence of diabetes is associated with age, educational level, occupation, body mass index and self-rated health status.

Objective To evaluate the effects of ELISPOT (enzyme-link immunospot) test using different samples in diagnosing tuberculous pleurisy. Methods Using T-Spot-TB kit to detect interferon-γlevel in pleural effusion and periph?eral blood from 164 patients with tuberculous pleural effusion and 102 patients without tuberculous pleural effusion. Number of spot forming cells (SFCs) as well as the specificity and sensitivity of the tests were compared between these two methods (ELISPOT using leural effusion or peripheral blood). Results The area under the ROC curve was 0.947 in pleural effusion Elispot test while it was 0.905 in peripheral blood Elispot test. The sensitivity of pleural effusion ELISPOT test in diagnosis of tuberculous pleurisy (95.1%) was significantly higher than that of peripheral blood ELISPOT test (89.0%). What’s more, the specificity of pleural effusion ELISPOT test in diagnosis of tuberculous pleurisy (90.2%) was higher than that in diagno?sis of peripheral blood ELISPOT test (88.2%). Conclusion The pleural effusion ELISPOT test is more valuable than periph?eral blood ELISPOT in the diagnosis of tuberculous pleuritis.

To study the regulation of androgen receptor (AR) expression in human prostate cancer LNCaP cells by triptolide (TP) and the possible mechanism, by using qRT-PCR and Western blot, the AR mRNA and protein levels in TP treated LNCaP cells were detected, and the AR protein level in TP and NF-κB inhibitor treated LNCaP cells was also detected; a series of pGL3-AR promoter reporter gene vectors were built using restriction-free cloning method, and the vectors were employed to investigate the effects of TP on the transcriptional activity of AR promoter in LNCaP cells; the upstream proteins which may play regulatory roles were detected using western blot assay. After treated LNCaP cells with TP for 48 h, AR mRNA and protein expressions decreased with increasing TP concentration. The expression of AR target gene PART1 and prostate specific antigen (PSA) was also downregulated by TP treatment; a series of pGL3-AR promoter reporter vectors were constructed and validated by sequencing and luciferase activity; the results of dual luciferase reporter assay showed that TP downregulated AR at the transcriptional level; PI3K/AKT/NF-κB pathway which is associated with AR promoter activity was drowregulated by TP. In conclusion, our results demonstrated that the transcriptional activity of AR in LNCAP cells was downregulated by TP, and PI3K/AKT/NF-κB pathway may be involved in the regulation mechanism.

OBJECTIVE:To compare the quality of domperidone tablets produced by 3 different factories METHODS:The quality of different products was investigated according to the standards of Ministry of Public Health and manufacture factories,including dissolubility,uniformity of dosage units,related substances and seals of blister packaging RESULTS:In 3 batches of products manufactured by Y,W and L,the contents of domperidone were 98 23%～99 74%,96 92%～98 31% and 97 42%～98 72%,and content uniformity A+1 8S was 2 11～3 38,3 97～5 25 and 5 49～7 47 respectively,which were in keeping with the Chinese pharmacopoeia;impurity R061668 was not found,and contents of impurity R052211 were 0 004%～0 024%,0 029%～0 072% and 0 003%～0 056%;the total impurity substances were 0 030%～0 095%,0 102%～0 128% and 0 232%～0 489%;the dissolubity(45min) was 95 09%～95 77%,91 25%～96 43% and 95 48%～96 58% respectively In experimental condition,no leakage was found from blister package of Y and W products,however,the leak rate of L product reached more than 38% CONCLUSION:According to this survey,the quality of product Y is the best,W is better

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