Objective To explore the mutation in corel β3-galactosyl-transferase specific molecular chaperone(Cosmc、no-coding region and it's effects on the transcription level of Cosmc in Tn antigen positive tumor cells.Methods The Tn antigen positive(Tn+)and negative(Tn-)cells were separated from tumor tissues by immune magnetic bead,then the genomic DNA(gDNA),total RNA were prepared by Qiagen AllPrep DNA/RNA mini kit. In these cells.the transcription levels of T-synthase and Cosmc mRNA were tested by RT-PCR.the DNA of Cosmc non-coding region was amplified by PCR,the mutation in Cosmc non-coding region were further detected by sequencing.Results There are no mutation appearing in Tn-cells,one or more mosaic sequence allele appearing in portion of patient's Tn-cells.Almost of the Tn+cells which separated from tumor tissues and Jurkat T cell exists mutation.but the mutation style and mutation point were not saine in different tumor.Thtee patient's Tn+cells have loss of hetemzygosity(LOH),four patient's Tn+cells and Jurkat T cell have point mutation.Although no difference of transcription level of T-synthase mRNA in Tn+ and Tn-cells.but the transcription level of Cosmc mRNA in Tn+ cell was much lower than that in Tn-cell.The ratio of T-synthase/Cosmc mRNA in Tn+ tumor cells was hiigher than that in Tn-cell.Conclusion The tumor Tn antigen arise from mutation in Cosmc non-coding region maybe result from transcription level decreased of Cosmc mRNA.

Objective To observe the genetic structure of cultivated Scrophularia ningpoensis in Zhejiang Province.Methods The genetic structures of six typical S.ningpoensis populations were analyzed by fluorescence AFLP marker.Results Bands(12 552) were generated by seven pairs of AFLP primer combinations,of which 8 808 were polymorphic,and the polymorphic rate was 70.17%.The variety ranges of PPB among different populations were 41.67%—55.56%,and 47.30% in average.I was between 0.190 8—0.238 3,and 0.221 8 in average.Ne was between 1.201 4—1.280 6,and 1.236 9 in average.Gst was 0.127 1,Nm was 3.432 4.UPGMA Cluster analysis showed that the six populations can be divided into two clusters,as that of Tiantai,Jinyun,and Jingning were one sub-cluster,and Dongyang,Pan′an,and Xianju were another one sub-cluster.Conclusion There is a relative high genetic diversity level in cultured S.ningpoensis of Zhejiang Province.Genetic differentiation exists among populations,but it exists in population mostly.There is a relative high genetic intercommunion among populations.The genetic distance is not related to the geographic environment.

acts was much lower than that in Tn-cell.Conclusion The expression of Tn,STn,T and ST antigen in gastric carcinoma tissues of different TNM stages is different.Tn antigen expression in tumor cells may be caused by the decrease of T-Synthase activity.

Objective: To choose the corresponding teaching methods according to different teaching stage in the teaching of pathology for five-year clinical students, and to analyze the difference of teaching effects between staged-teaching and traditional teaching. Methods: Students were randomly divided into two groups, with 112 in the experimental group and 118 in the control group. Considering that the teaching content in the experimental group contained the general introduction and different sections and students might experience stages such as "knowledge memorizing", "pathology-clinical connection" and "knowledge application", so presentation, assimilation and discussion class (PAD class), blending teaching and flipped classroom were adopted respectively. Examination scores and questionnaire survey were used to evaluate the difference between two teaching ways. SPSS 19.0 was used for data analysis, and t-test and chi-square test were used for inter-group comparison. Results: The pathological average score of students in the experimental group was (78.56±7.172), which was higher than (72.53±8.539) in the control group, with statistically significant difference (t=5.809, P=0.000). According to the questionnaire survey, the teaching effects using different teaching methods in different stages in the experimental group was superior than that in the control group, with statistically significant difference (P<0.01). Conclusion Using different teaching methods in different stages is beneficial to guide students for truly comprehending the knowledge, applicating appropriate learning methods, and gradually forming their self-learning ability.

Objective:To analyze common respiratory pathogens epidemiology in hospitalized children with lower respiratory tract infection (LRTI) in a single center in Shanghai, and to provide the basic data support for clinical diagnosis and treatment of children with LRTI in Shanghai.Methods:Children with LRTI in Children′s Hospital of Fudan University were enrolled from January 1, 2015 to December 31, 2019, and respiratory samples were collected and tested by direct immunofluorescence assay and real time polymerase chain reaction. The epidemiological characteristics of different respiratory pathogens were analyzed. Chi-square test was used for statistical analysis.Results:A total of 18 716 children were included, the total detection rate of respiratory pathogens was 36.96% (6 918/18 716), and the most frequent detected pathogen was Mycoplasma pneumoniae (MP) (15.31%(2 866/18 716)), followed by respiratory syncytial virus (RSV) (10.40%(1 946/18 716)) and parainfluenza virus Ⅲ (PIV-Ⅲ) (4.65%(871/18 716)). The detection rate of pathogens in female was significantly higher than that in male (38.48%(2 936/7 630) vs 35.92%(3 982/11 086), χ2=12.72, P<0.001). RSV and influenza virus A (Flu-A) infections peaked in winter. The detection rates of influenza virus B (Flu-B) and human metapneumovirus (MPV) were higher in winter and spring. PIV-Ⅲ infection peaked in spring and summer. The peak of PIV-Ⅱ infection occurred in summer and autumn. The infections of adenovirus (ADV), MP, Chlamydia trachomatis (CT) and PIV-Ⅰ were prevalent throughout the year without significant seasonality. The detection rate of RSV declined with age, while the detection rate of MP increased with age. The co-infection rate was 1.65%(309/18 716), and the predominant co-infection type was MP and RSV (0.37%(70/18 716)). Conclusions:A variety of pathogens lead to children′s LRTI in Shanghai from 2015 to 2019, with the common infection of MP, RSV and PIV-Ⅲ. Different pathogens showed different epidemiological characteristics in age and season distributions.

Objective This study was conducted to analyze the clinical characteristics and pituitary function of patients with primary empty sella (PES).Methods The clinical data from 123 hospitalized adult patients with PES from January 2010 to May 2016 were retrospectively studied.Results (1) The average age of the 123 (male 43,female 80) PES patients was (59.2 ± 13.6) years (ranging 24-92 years),among whom 61％ patients were in the age group between 50-69 years.(2) The symptoms of the patients included fatigue (56.1％),headache (34.1％),nausea and vomiting (17.9％),gonadal dysfunction (17.1％),visual disturbance (5.7％) and hypopituitarism crisis (3.3％).(3) Hypopituitarism was found in 66 of the 123 patients.Among them,36.6％,31.7％ and 17.1％ were central hypoadrenalism,hypogonadism,and hypothyroidism,respectively.The percentage of hypopituitarism in complete PES was significantly higher than that in partial PES (P ＜ 0.05).(4) Sixteen patients were concomitant with other autoimmune diseases including 11 patients with Graves' disease and 2 with Cushing's syndrome due to adrenal adenoma.Conclusions The incidence of hypopituitarism in PES was 53.7％,in which the pituitary-adrenal axis hypofunction was more common.An overall evaluation of the pituitary function was essential for the patients who had headache and fatigue,or with suspected PES.The patients with hypopituitarism should be given hormone replacement therapy in time and followed up afterword.

Objective:To analyze the clinical and radiological features of patients with resected pancreatic serous cystic neoplasm (SCN).Methods:A retrospective analysis was conducted on the clinical and radiological data of 172 patients with pancreatic SCN who underwent surgical resection and were pathological confirmed at Peking Union Medical College Hospital from September 2014 to April 2022. These patients were categorized into two cohorts including 2014—2018 cohort ( n=84) and 2019—2022 ( n=88) for comparative analysis based on the operation time. Results:The radiological diagnostic accuracy for SCN was found to be notably low at 11.6%(20/172), which was mostly misdiagnosed as mucinous cystic neoplasms (86/172, 50.0%) and intraductal papillary mucinous neoplasms (35/172, 20.3%). No statistically significant variance was observed on the misdiagnosis rate between the two cohorts. There was a substantial increase of the number of lesions located in pancreatic body and tail (76.1% vs 53.6%, P=0.004) and a marked decrease in the number of those located in pancreatic head and neck (22.7% vs 39.3%, P=0.019) in 2019-2022 cohort, compared to the 2014-2018 cohort. Furthermore, there was a significant reduction in the occurrence of SCN calcification and peri-lesional venous alterations (22.8% vs 45.1%, P=0.006; 25.0% vs 46.4%, P=0.003), a decrease in the presence of fibrous scarring within SCN (31.8% vs 45.2%, P=0.070), and an increase in cases with dilatation of the upstream main pancreatic duct (28.2% vs 16.3%, P=0.065). The clinical characteristics and the rate of postoperative complications did not significantly differ between the two cohorts. Complication rates after pancreatoduodenectomy were significantly higher than those following distal pancreatectomy (46.4% vs 22.9%, P=0.010). The presence of clinical symptoms was significantly linked to the size of SCN and the expansion of the main pancreatic duct (45.4% vs 29.3%, P=0.032; 64.9% vs 31.2%, P<0.001). Conclusions:The accuracy of preoperative radiological diagnosis for SCN is still low, with a noted increase in the proportion of SCN exhibiting atypical radiological features in recent years. The frequency of postoperative complications is relatively high and does not have an obvious decreased trend.