Objective To study endocrine disruptor chemicals causing malformed frogs in an irrigation canal in T city and a pool in CH city. Methods Water samples collected from an irrigation canal in T city and a pool in CH city where malformed frogs were found were concentrated through H103 resin. The concentrated samples were purified and derivated. The endocrine disruptor chemicals in the derivatives were determined by GC/MS and the estrogenic activities in concentrated water samples were assessed by the recombinant yeast estrogen system (RYES). Results Endocrine disruptor chemicals bisphenol_A (5.6?10-3～1.52 ?g/L) and nonylphenol (0.46～0.58 ?g/L) were found in the concentrated water samples of the irrigation canal in T city and the pool in CH city. RYES showed that the estrogenic activities were positive and this result accorded with the data given by GC/MS. Conclusion The results indicated that the cause resulted in malformation of frogs in the irrigation canal in T city and the pool in CH city might be related to endocrine disruptor chemicals.

Avian influenza virus H6N1 subtype has been circulating in aquatic bird and terrestrial bird,and is the most frequently detected subtype of influenza A virus in those hosts.Genetic analysis results suggested that this virus might be the progenitor of the highly pathogenic avian influenza H5N1 virus,as seven of eight gene segments of those viruses had a common source.As continuing evolution of H6N1,it could spread across species barriers to mammals and had strong infection ability in mice,swine and ferrets.Serological epidemiological survey showed that a few people were positive for H6 avian influenza virus antibody and then the world's first human infection with influenza virus H6N1 subtype was reported in May 2013.Therefore,with the expansion of the host range of the virus,gene mutation and gene reassortment of H6N1 virus can occur in these hosts,and then it may evolve into novel variant strain with infected human potential.

Objective: To study the expressions of mitochondrial protein (MAB1273), Bcl-2, and Bax in renal cell carcinoma and to investigate their role in the tumorigenesis. Methods: The expressions of mitochondrial protein, Bcl-2 and Bax were detected by immunohistochemistry SP method in 9 tissue samples of renal on-cocytoma, 6 samples of chromophobe carcinoma, 23 samples of clear cell carcinoma and 12 samples of normal renal tissue. Results: The expression of MAB1273 in renal oncocytoma, chromophobe carcinoma and clear cell carcinoma was much higher than that in normal renal tissue (P=0.006). No significant difference was found in MAB1273 expression among the three types of renal carcinoma. The expression of Bcl-2 was higher in the renal carcinoma groups than in the normal renal tissue group, with a significant difference (P=0.008). The expression of Bax was not different among all of the groups (P=0.057). Rank correlation analysis showed a positive correlation between MAB1273 and Bcl-2 expression (r=0.341, P=0.015). The expression of Bcl-2 was negatively correlated with Bax expression (r= -0.287, P=0.043). Conclusion: Overexpression of mitochondrial protein and Bcl-2 and underexpression of Bax may play a part in the genesis of renal oncocytoma, chromophobe carcinoma and the clear cell carcinoma, indicating that overexpression of MAB1273 may be correlated with apoptosis of renal cell carcinoma cells.

Objective Curculiginis extract has good scavenging effects on oxygen free radicals, and there is no curculiginis extract for AD research at home.The aim of this study was to explore the influence of Curculigoside on the cognitive learning and memory functions of senile dementia model rats induced by D-galactose combined with β-protein amyloid β25-35 (Aa25 35) and the expression level of hippocampus B-cell lymphoma-2 (Bcl-2), Bax, estrogen receptor (ER) protein and mRNA.Methods Forty SD rats weredivided into the control group (equal saline was intraperitoneal injected for six weeks consecutively, and equal saline was injected to the bilateral hippocampus in the seventh week), the model group (galactose was intraperitoneal injected for six weeks consecutively, and 4 mmol/L Aβ25-35 was injected to the bilateral hippocampus in the seventh week), the low dosage group and the high dosage group randomly (the stomach irrigation of low dosage 24mg/kg or the high dosage 72mg/kg curculigoside was applied every day, for 8 weeks), 10 rats in each group.After the treatment , the Morris water maze was conducted to test the space learning and memory functions of rats;the flow cytometry method was conducted to analyze the neuronal apoptosis conditions;the western blot was conducted to detect Bcl-2, Bax and ER protein level;the Realtime PCR was conducted to detect Bcl-2, Bax and ER mRNA level.Results Morris water maze test results: Compared with the model group, the escape latency (EL) of the rats of the model group, the low dosage group and the high dosage group on the 2nd, the 3rd, the 4th and the 5th day significantly extends (P<0.01), and the high dosage group significantly shortens (P<0.05) than the low dosage group.Space exploration test results: Compared with the proportion of the distance swum within the quadrant by the rats in the model group in the total distance [(30.14±5.10)%], that of the low dosage group, the high dosage group and the control group [(41.98±4.78)%, (46.17± 9.31)% and (50.13±6.81)%] significantly increases (P<0.01);in addition, the high dosage group is higher than the low dosage group (P<0.05).Compared with the apoptosis rate of rates in the model group[(7.11±1.78)%], that of the high dosage group, the low dosage group and the control group[(5.53±1.45)%], (4.11±1.03)% and (3.08±1.33)% significantly decreases (P<0.05).Compared with the control group, the Bcl-2 and Bax protein expression of the model group significantly increases, and the cell Bcl-1 and Bax of cells significantly decreases (P<0.05).Compared with the model group, the Bcl-2 and ER protein expression as well as the Bcl-2/Bax of the high dosage group and the low dosage group significantly increase, and the Bax protein expression significantly decreases (P<0.05).Compared with the mRNA expression (1.00 and 1.00) of Bcl-2 and ER in the control group, the mRNA expression (1.31 and 1.98) of the Bcl-2 and Bax in the model group significantly increases (P<0.05);compared with the mRNA expression (1.13 and 1.08) of Bcl-2 and ER in the model group, the Bcl-2 (1.95 and 2.01) and mRNA expression (1.81 and 1.96) of ER of the high dosage group and the low dosage group significantly increase (P<0.01).Conclusion Curculigoside plays an improving role in space learning and memory functions of senile dementia model rats, with the mechanism may be related to the protection to the hippocampus neurons by restraining Bax expression and neuronal apoptosis through the up-regulation of hippocampus ER and Bcl-2 expressions.

Catheter Ablation ; Cold Temperature ; Cysts ; congenital ; Humans ; Tongue ; pathology ; surgery

Objective: To investigate the spatial clustering characteristics of varicella public health emergency events in Nanjing City from 2017 to 2022, so as to provide the evidence for the development of varicella prevention and control strategies. Methods: Data of varicella public health emergency events in Nanjing City from 2017 to 2022 were collected through Emergency Public Health Management Information System of Chinese Disease Prevention and Control Information System. The software ArcGIS 10.2 was employed for trend-surface analysis, spatial autocorrelation analysis and hotspot analysis to understand the spatial clustering characteristics of varicella public health emergency events. Results: A total of 84 varicella public health emergency events were reported in Nanjing City from 2017 to 2022, with an average attack rate of 2.53% (2 558 cases). Ⅳ-level events were predominant, accounting for 90.48% (76 events). The trend-surface analysis showed lower incidence of varicella public health emergency events in the west of Nanjing City and higher in the east, and lower in the north and higher in the south. The global spatial autocorrelation analysis showed that there was a positive spatial correlation in varicella public health emergency events in 2017 and 2019, indicating spatial clustering (P<0.05). The hot spots were Jiangning District, Gaochun District, Yuhuatai District and Jianye District. Conclusion The incidence of varicella public health emergency events in Nanjing City from 2017 to 2022 has spatial aggregation, with a concentration in suburban areas such as Jiangning District and Gaochun District.

The aim of this research was to explore the most optimal method of DNA extraction from formalin-fixed, paraffin-embedded (FFPE) tissues, and to improve the amplification of long fragments with the method. Three methods, one step method, phenol-chloroform extraction method, and genomic DNA purification kit method, were employed to extract DNA from twenty normal thyroid tissues which were fixed with formalin and embedded with paraffin. The highest proportionality of OD260/OD280 in the examples was obtained by phenol-chloroform extraction method, 1.703 +/- 0.086, compared to the results of the other two methods. As for the long DNA segments amplification, the achievement ratio of one step method, phenol-chloroform extraction method and genomic DNA purification kit method were 0%, 5% and 10%, respectively, by traditional PCR method, but 0%, 95% and 85% respectively by the nest PCR. We have found that the best process of extracting DNA from FFPE is digesting by proteinase K and purifying by phenol-chloroform, and it is effective to amplify long DNA segments from FFPE by nest PCR.
Base Sequence ; DNA ; isolation & purification ; Formaldehyde ; Humans ; Molecular Sequence Data ; Paraffin Embedding ; Pathology, Molecular ; methods ; Polymerase Chain Reaction ; methods ; Sensitivity and Specificity ; Thyroid Gland ; pathology ; Tissue Fixation

Objective:To explore the diagnostic value of ultrasound-guided fine needle aspiration biopsy(US-FNAB)for thyroid nod-ules.Methods:The clinical characteristics and cytopathological diagnosis of patients with thyroid nodules in Tianjin Medical University General Hospital were analyzed retrospectively;the results of the cytopathological and pathological diagnoses were compared and an-alyzed.Results:Of the 1,241 US-FNAB samples,the ratio of men to women with thyroid nodules was 1:3.83(257/984).The incidence of thyroid nodules gradually increased from the age of 20 years and declined after the age of 60 years.The nodules,which were less than or equal to 1.0 cm in size,accounted for 51.57%(640 cases),and Thyroid Imaging Reporting And Data System(TIRADS)classifica-tion 4 accounted for 86.38%(1 072 cases).Of cyto-pathological diagnoses,22.00%(273 cases)were non-diagnostic,9.75%(121 cases) were benign,30.62%(380 cases)were atypia with undetermined significance,32.15%(399 cases)were suspicious for malignancy,and 5.48%(68 cases)were malignant.In the 302 patients who underwent surgery,the number of cases of clear diagnoses,unavailable di-agnoses,and atypia of undetermined significance were 203,21,and 78,respectively.In the 203 cases of clear diagnoses,the sensitivi-ty,specificity,positive predictive value,negative predictive value,precision,and misdiagnoses following US-FNAB of thyroid nodules were 100.00%(201/201),50.00%(1/2),99.50%(201/202),100.00%(1/1),99.51%(202/203),and 0.49%(1/203),respectively.In the 78 cases that were atypia of undetermined significance,the malignancy rate was 70.51%.Whether the atypia of undetermined signifi-cance was malignant or not was related to the TIRADS classification(P<0.05),and not related to the age,sex,tumor size,or location of the nodules(P>0.05).Conclusions:US-FNAB has high diagnostic value for thyroid nodules and is worthy of being popularized widely.If it replaced some intra-operative frozen sectioning procedures,it may reduce intra-operative waiting time and financial burden of pa-tients.

Objective To compare the effects of sevoflurane and propofol anesthesia on endothelial glycocalyx degradation in the patients undergoing abdominal surgery.Methods Sixty American Society of Anesthesiologists physical status Ⅰ or Ⅱ patients of both sexes,aged 25-75 yr,weigbing 45-80 kg,scheduled for elective open colon or rectal surgery,were divided into 2 groups (n =30 each) using a random number table method:sevoflurane anesthesia group (group S) and propofol anesthesia group (group P).In group S,1.5％-2.5％ sevoflurane was inhaled for maintenance of anesthesia.In group P,propofol was intravenously infused at 50-150 μg · kg-1 · m-1 to maintain the bispectral index value at 40-60.The concentrations of heparan sulfate (HS),syndecan-1 and vascular cell adhesion molecule-1 (VCAM-1) in serum were determined after tracheal intubation (T0),at 1 h after skin incision (T1),at 2 h after skin incision (T2),at the end of operation (T3) and at 24 h after operation (T4).Blood gas analysis and blood biochemical test were performed at T0 and T4,and strong ion gap (SIG) was calculated.Results Compared with the baseline at T0,the concentrations of serum HS at T2-4 and syndecan-1 at T3-4 and SIG at T4 were significantly increased,and the concentrations of serum ALB at T4 were decreased in S and P groups (P＜0.05).Compared with group P,the concentrations of serum HS at T3,4 and syndecan-1 at T4 and SIG at T4 were significantly decreased,the concentrations of serum ALB at T4 were increased (P＜0.05),and no significant change was found in the serum concentrations of VACM-1 and lactate in group S (P＞0.05).Conclusion Compared with propofol anesthesia,sevoflurane anesthesia is more helpful in decreasing endothelial glycocalyx degradation and in reducing vascular endothelial damage in the patients undergoing abdominal surgery.