OBJECTIVES: To explore the value of ferroptose-related genes in the diagnosis and prediction of ulcerative colitis (UC). METHODS: We used UC dataset from the GEO database to screen for differentially expressed genes (DEGs) in UC. The DEGs related to ferroptositis were screened from the FerrDb database and their functions were analyzed. The hub genes were identified by constructing the protein-protein interaction network (PPI), the differences in immune infiltration levels between UC and the control group were evaluated using CIBERSORT, and the diagnostic values of the hub genes for UC were verified by using the training set. In a mouse model of UC, we examined the expression levels of the hub genes in the colon tissues of the mice using real-time fluorescence quantitative PCR (qPCR). RESULTS: We identified a total of 76 DEGs related to ferroptosis. Functional enrichment analysis showed that these genes were significantly enriched in ferroptosis and hypoxia pathways. The PPI network identified 10 hub genes, and 9 of them were highly expressed in UC. Analysis of immune cell infiltration showed that 27 cell types were significantly increased in UC (P<0.05), and the immune checkpoints-related genes had the strongest correlation with the hub gene PPARG (P<0.05). Verification analysis using the training set showed that P4HB, PPARG and STAT3 had the best predictive value for UC (P<0.05). In the UC mouse model, the expression of PPARG was significantly decreased and the expressions of P4HB and STAT3 were significantly increased in the colon tissues of the mice as compared with the normal mice. CONCLUSIONS Ferroptose-related genes have significant value for diagnosis and prediction of UC.
Colitis, Ulcerative/genetics* ; Animals ; Mice ; Ferroptosis/genetics* ; Humans ; Protein Interaction Maps ; Disease Models, Animal ; Gene Expression Profiling ; STAT3 Transcription Factor/genetics*

Objective:To compare the surgical efficacy of pericardial soft ring tricuspid valvuloplasty with DeVega and artificial valvuloplasty.Methods:227 patients undergoing tricuspid valvuloplasty due to rheumatic heart disease complicated with functional tricuspid valve insufficiency were retrospectively analyzed and divided into 3 groups according to tricuspid valvuloplasty dynamic cohort(pericardial ring group, 89 cases; the artificial flap ring group, 61 cases, and the DeVega group, 77 cases) were matched 1∶1 for propensity score(match A: pericardial ring group and artificial flap ring group; match B: pericardial ring group and DeVega group), the successful matching was included in follow-up and data collection, and cases with incomplete case data during follow-up were removed from the study cohort in pairs according to matching conditions. The results of follow-up 1 month, 6 months and 24 months after surgery were compared.Results:1 month after operation: the tricuspid valve regurgitant in all groups was significantly reduced or even disappeared compared with that before operation, and the right atrium and right ventricle were also smaller than that before operation, with statistical significance( P<0.05). 6 months after surgery: There was no statistical significance in the area of tricuspid regurgitation and right atrial/indoor diameter between all groups compared with the results one month after surgery( P>0.05), and there was no statistical significance in the recurrence rate of tricuspid regurgitation between all groups( P>0.05). 24 months after surgery: There were no significant differences in the recurrence rate of tricuspid regurgitation, area of tricuspid regurgitation and right atrial/indoor diameter between the two groups in matching A( P>0.05). There was no statistical significance in the right atrial/indoor diameter between the matched pericardial ring group and the Devega group, but the tricuspid valve regurgentation area of the Devega group at 24 months after surgery was higher than that of the Devega group at 1 month after surgery, and the difference was statistically significant( P<0.05). The regurgitation area and recurrence rate of tricuspid valve were significantly higher than those of pericardium-TVP group( P<0.05). Conclusion:Pericardial soft ring tricuspid valvuloplasty can effectively correct functional tricuspid valvuloplasty and reverse right heart remodeling, which is an effective tricuspid valvuloplasty.

Based on the demand of enterprise talents and the characteristics of manufacturing process management in biotechnology, in order to make the students acquire the ability to solve complex engineering problems in the production process, we developed a "Comprehensive Biotechnology Experiment" course, where two-step enzymatic production of l-aspartate and l-alanine were the key processes. In this course, we drew lessons from the site management of the production enterprise, performed the experimental operation mode of four shifts and three operations. The content of this course includes principles, methods and experimental techniques of several core curricula and the site management mode of enterprises. As to the evaluation, the summary of the experimental staff's handover records and the content of teamwork were examined and scored. Through teaching practice and continuous improvement, we developed a complete experimental teaching process and assessment mechanism. Overall, the Comprehensive Biotechnology Experiment course achieved good teaching effect, which may serve as a reference to promote the development of experimental teaching of biotechnology.
Humans ; Biotechnology ; Curriculum ; Students

Objective:To investigate the efficacy and mechanism of Jasminoside in dextran sodium sulfate (DSS) -induced ulcerative colitis (UC) mice.Methods:Eighteen C57BL/6 mice were randomly divided into control group, UC group and UC+Jasminoside group, with six mice in each group. The mice in UC group and UC+Jasminoside group freely drank 3%DSS solution for 7 days to induce UC mouse model. The mice in control group freely drank the water without DSS. During the modeling period, the mice in the UC+Jasminoside group were given Jasminoside at a dose of 20 mg/ (kg·d) by gavage for 7 consecutive days, meanwhile the mice in control group and UC group were given equal volumes of distilled water by gavage. The change of body weight and disease activity index (DAI) of the mice were observed daily, and the length of the colon was measured 7 days after the intervention. HE staining was used to observe the inflammatory changes of the colon, and Western blot was used to measure the expression of anti-apoptotic proteins (Bcl-2 and Bcl-xl), caveolin-1 (CAV-1), inducible nitric oxide synthase (iNOS), tight junction proteins (Occludin and Claudin-1). The differences in the above indicators among the mice in three groups were analyzed statistically.Results:All the mice survived. Compared with the control group, the body weight was lower, DAI score was higher, colon was shorter, whose differences were all statistically significant (all P<0.05), and inflammatory infiltration of colon tissue was more severe in mice of UC group. Compared with the UC group, body weight was higher, DAI score was lower, colon was longer, whose differences were all statistically significant (all P<0.05), and inflammatory infiltration of colon tissue was alleviated in mice of UC+Jasminoside group. Western blot results showed that compared with control group, the expression of Bcl-2, Bcl-xl, CAV-1, Occludin and Claudin-1 was significantly lower and the expression of iNOS was significantly higher in the colon tissues of mice in UC group, and the differences were statistically significant (all P<0.05). The expression of Bcl-2, Bcl-xl, CAV-1, Occludin and Claudin-1 in the colon tissues of mice in UC+Jasminoside group was significantly higher than those in UC group, while the expression of iNOS was lower, and the differences were statistically significant (all P<0.05) . Conclusion:Jasminoside can alleviate the symptoms of UC model mice, and its mechanism of action may be related to upregulating the expression of anti-apoptotic proteins and protecting the intestinal mucosal barrier through CAV-1/iNOS pathway.

Objective:To investigate the efficacy and mechanism of Jasminoside in dextran sodium sulfate (DSS) -induced ulcerative colitis (UC) mice.Methods:Eighteen C57BL/6 mice were randomly divided into control group, UC group and UC+Jasminoside group, with six mice in each group. The mice in UC group and UC+Jasminoside group freely drank 3%DSS solution for 7 days to induce UC mouse model. The mice in control group freely drank the water without DSS. During the modeling period, the mice in the UC+Jasminoside group were given Jasminoside at a dose of 20 mg/ (kg·d) by gavage for 7 consecutive days, meanwhile the mice in control group and UC group were given equal volumes of distilled water by gavage. The change of body weight and disease activity index (DAI) of the mice were observed daily, and the length of the colon was measured 7 days after the intervention. HE staining was used to observe the inflammatory changes of the colon, and Western blot was used to measure the expression of anti-apoptotic proteins (Bcl-2 and Bcl-xl), caveolin-1 (CAV-1), inducible nitric oxide synthase (iNOS), tight junction proteins (Occludin and Claudin-1). The differences in the above indicators among the mice in three groups were analyzed statistically.Results:All the mice survived. Compared with the control group, the body weight was lower, DAI score was higher, colon was shorter, whose differences were all statistically significant (all P<0.05), and inflammatory infiltration of colon tissue was more severe in mice of UC group. Compared with the UC group, body weight was higher, DAI score was lower, colon was longer, whose differences were all statistically significant (all P<0.05), and inflammatory infiltration of colon tissue was alleviated in mice of UC+Jasminoside group. Western blot results showed that compared with control group, the expression of Bcl-2, Bcl-xl, CAV-1, Occludin and Claudin-1 was significantly lower and the expression of iNOS was significantly higher in the colon tissues of mice in UC group, and the differences were statistically significant (all P<0.05). The expression of Bcl-2, Bcl-xl, CAV-1, Occludin and Claudin-1 in the colon tissues of mice in UC+Jasminoside group was significantly higher than those in UC group, while the expression of iNOS was lower, and the differences were statistically significant (all P<0.05) . Conclusion:Jasminoside can alleviate the symptoms of UC model mice, and its mechanism of action may be related to upregulating the expression of anti-apoptotic proteins and protecting the intestinal mucosal barrier through CAV-1/iNOS pathway.

The amino acid sequence of ancestral enzymes from extinct organisms can be deduced through in silico approach termed ancestral sequence reconstruction (ASR). ASR usually has six steps, which are the collection of nucleic acid/amino acid sequences of modern enzymes, multiple sequence alignment, phylogenetic tree construction, computational deduction of ancestral enzyme sequence, gene cloning, and characterization of enzyme properties. This method is widely used to study the adaptation and evolution mechanism of molecules to the changing environmental conditions on planetary time scale. As enzymes play key roles in biocatalysis, this method has become a powerful method for studying the relationship among the sequence, structure, and function of enzymes. Notably, most of the ancestral enzymes show better temperature stability and mutation stability, making them ideal protein scaffolds for further directed evolution. This article summarizes the computer algorithms, applications, and commonly used computer software of ASR, and discusses the potential application in directed evolution of enzymes.
Amino Acid Sequence ; Evolution, Molecular ; Phylogeny ; Proteins/genetics* ; Sequence Alignment

Objective To understand the extensions of pharmaceutical care at medical institutions in China.Methods From June to October 2018, 196 cases were collected regarding " exploring new areas of pharmaceutical care" , which ranks one of the ten innovative medical services under China Healthcare Improvement Initiative(2018-2010). By means of statistics on the frequency of the subject words in the cases, the authors identified hotspots of these hospitals in this regard, and used descriptive analysis to study the data. Results The 196 cases covered 23 items of pharmaceutical care, including three traditional" guaranteed drug supply" services, i.e., drug supply, drug dispensing and drug storage management; one traditional Chinese medicine supply service, namely decoction and delivery of traditional Chinese medicine decoction; 19 pharmaceutical professional technical services, namely, prescription(doctor′s advice)review, patient education and guidance, and prescription ( doctor′s advice) comment among others. Conclusions The connotation of pharmaceutical care is extending rapidly. Therefore we should enhance the professional value of pharmacists, establish training programs for pharmaceutical talents, establish incentive mechanism for pharmaceutical care, and promote the rapid development of patient-centered pharmaceutical care.

Objective To investigate the expressions of CD133 and p53 in colorectal cancer and their clin-ical significances. Methods The expressions of CD133 and p53 in 74 colorectal cancer patients were detected by the immunohistochemistry method. The relationships of CD133 and p53 with the clinicopathological parameters and prognosis were analyzed. Results The positive expression rates of CD133 and p53 in colorectal cancer tissues were 33.8%and 55.4%,respectively. The expression levels of CD133 and p53 were not related to age,sex,tumor location and histological type ,and but were significantly related to the histological differentiation ,TNM stage and distant metastasis(P<0.05,respectively). The Spearman correlation analysis showed that there was no correlation between the levels of CD133 and p53. Conclusions The high expressions of CD133 and p53 in colorectal cancer tissues were closely related to the histological differentiation and TNM stage. CD133 and p53 could be used as important biomarkers for the evaluation of malignant biological behavior,and the diagnosis and prognosis of colorectal cancer.

Objective To investigate the efficacy and tolerability of dose-dense chemotherapy with cisplatin plus 5-fluorouracil( PF regimen)in distant metastatic nasopharyngeal carcinoma( NPC)patients. Methods From April 1,2008 to April 30,2014,168 patients were assigned to traditional group(n = 83) and dose-dense group(n = 85)using digital random table in 1 : 1 ratio. All patients received PF regimen,and once every 28 days in traditional group and once every 14 days in dose-dense group. The primary endpoint was progression-free survival(PFS)and the secondary endpoint was overall survival(OS),toxicity and response rate. Results The median PFS,median OS,1,2,3-year survival rate,complete response rate and objective response rate were significantly improved in dose-dense group which were 13. 3 months,20. 2 months,80. 2% , 36. 0% ,16. 1% ,16. 5% ,84. 7% ,and those in control group were 10. 0 months,16. 1 months,59. 6% , 10. 1% ,0,3. 6% ,54. 2% respectively(χ2 = 24. 47,P = 0. 000;χ2 = 16. 65,P = 0. 000;χ2 = 8. 41,P =0. 004;χ2 = 16. 96,P = 0. 000;χ2 = 14. 91,P = 0. 000;χ2 = 7. 63,P = 0. 006;χ2 = 18. 47,P = 0. 000). The rates of grade 3-4 adverse events in dose-dense and traditional group were 38. 8% and 6. 0%(χ2 = 25. 81, P = 0. 000). Conclusion Dose-dense chemotherapy of PF is more efficient and acceptable toxic than the tra-ditional one. It can be a new treatment option for patients with distant metastases of NPC.

Escherichia coli AFP111 is a spontaneous mutant with mutations in the glucose specific phosphotransferase system (ptsG) in NZN111 (delta pflAB deltaldhA). In AFP111, conversion of xylose to succinic acid generates 1.67 molecule of ATP per xylose. However, the strain needs 2.67 molecule ATP for xylose metabolism. Therefore, AFP111 cannot use xylose due to insufficient ATP under anaerobic condition. Through an atmospheric and room temperature plasma (ARTP) jet, we got a mutant strain named DC111 that could use xylose under anaerobic condition in M9 medium to produce succinic acid. After 72 h, DC111 consumed 10.52 g/L xylose to produce 6.46 g/L succinic acid, and the yield was 0.78 mol/mol. Furthermore, the reaction catalyzed by the ATP-generating PEP-carboxykinase (PCK) was enhanced. The specific activity of PCK was 19.33-fold higher in DC111 than that in AFP111, which made the strain have enough ATP to converse xylose to succinic acid.
Atmosphere ; Escherichia coli ; genetics ; metabolism ; Fermentation ; Industrial Microbiology ; Metabolic Engineering ; Mutation ; Plasma Gases ; pharmacology ; Succinic Acid ; metabolism ; Temperature ; Xylose ; metabolism