Objective To investigate the bidirectional causal relationship between endometriosis and thyroid cancer using bidirectional two-sample Mendelian randomization(MR).Methods Ge-nome-wide association study(GWAS)data for endometriosis were obtained from the FinnGen R11 database,and GWAS data for thyroid cancer were sourced from the European Bioinformatics Institute(EMBL-EBI).Single nucleotide polymorphisms(SNPs)that met the requirements were selected as instrumental variables.The inverse variance weighted(IVW)method was employed as the primary analytical approach,supplemented by MR-Egger regression,weighted median method,simple model,and weighted model results.Cochran's Q test,MR-Egger regression intercept analysis,and the leave-one-out method were used to assess the robustness of the results.Results Ultimately,25 SNPs high-ly associated with endometriosis and 3 SNPs highly associated with thyroid cancer were included in this study.The IVW analysis results of the forward MR analysis indicated no significant causal rela-tionship between endometriosis and the risk of thyroid cancer(P=0.50,OR=1.06,95％CI:0.88 to 1.29).This result was also supported by MR-Egger regression,simple model,weighted model,and weighted median analyses(P＞0.05).The IVW analysis results of the reverse MR analysis similarly showed no significant causal relationship between thyroid cancer and the risk of endometrio-sis(P=0.09,OR=1.03,95％CI,0.99 to 1.06).The findings from MR-Egger regression,sim-ple model,weighted model,and weighted median analyses all supported this conclusion(P＞0.05).Conclusion The MR analysis doesn't show a significant bidirectional causal relationship between endometriosis and thyroid cancer.

Objective To investigate the effect of progesterone receptor membrane component 1(PGRMC1)mediated autophagy on the sensitivity of liver cancer cells to 125I particles irradiation.Methods Hepatoma cell lines Huh7 and LM3 were exposed to different doses(0,2,4,6 and 8 Gy)of 125I particles,and cell autophagy was observed by transmission electron microscopy(TEM).Then,autophagy inhibitor chloroquine(CQ),agonist rapamycin(Rapa),and PGRMC1 inhibitor AG-205 were used respectively to verify that PGRMC1-mediated autophagy plays a key role in the sensitivity of hepatocellular carcinoma cells to 125I particle irradiation.Cell proliferation,colony formation and apoptosis were detected by CCK-8 assay,clonal formation test and flow cytometry,respectively.The expression levels of PGRMC1,microtubule-associated protein light chain 3-Ⅰ(LC3-Ⅰ),LC3-Ⅱ and p62 were detected by Western blotting.Results Different doses of 125I particles irradiation significantly decreased the proliferation and clonogenesis of Huh7 and LM3 cells(P＜0.05),and increased the apoptotic cells(P＜0.01),in a dose-dependent manner.Compared with the 0 Gy group,the ratio of LC3-Ⅱ/LC3-Ⅰ in Huh7 and LM3 cells was obviously increased,and the expression of p62 was significantly down-regulated in the 6 Gy group.The proliferation capacity and clonal formation ability of Huh7 and LM3 cells were decreased significantly,and their apoptotic cells were increased notably in the 6 Gy+CQ group than the 6 Gy group,while the above results were on the contrary in the 6 Gy+Rapa group.The 6 Gy+AG205 group had notably decreased LC3-Ⅱ/LC3-Ⅰ ratio in the Huh7 and LM3 cells,up-regulated p62 expression,reduced cell proliferation capacity and clone formation ability,and enhanced cell apoptosis when compared with the 6 Gy group,and the above results of the 6 Gy+PGRMC1 group were opposite.Conclusion Increment of PGRMC1 induced by 125I irradiation can promote autophagy,increase the proliferation and clonogenesis,and reduce the apoptosis in hepatocellular carcinoma cells.

Objective:To explore the application of the pioneering TEBMCL (task based evidence-based laboratory medicine team cooperative learning) teaching mode in the teaching of Clinical Biochemical Laboratory Technology. Methods:A total of 336 undergraduates of medical laboratory from 3 classes of Batch 2014 were selected as research objects, and 112 students in class 1 were randomly selected as the teaching reform class, 113 students in class 2 were randomized into control class 1 and 111 students in class 3 into control class 2. The teaching effects achieved by applying the TEBMCL teaching mode to the teaching of Clinical Biochemical Laboratory Technology in the three classes were compared comprehensively and the TEBMCL teaching mode was also evaluated. The Access 2010 and SPSS 17.0 statistical analysis methods were used for statistical analysis. Results:Learning effect: ①Compared with the basic test of the three classes, there was no statistical differences ( P > 0.05); but the in-class test after each chapter showed that the results of the teaching reform class were better than those of the other two classes ( P < 0.05). It was also found that the performance of the control class 1 was better than that of the control class 2 after applying the new TEBMCL teaching mode in the second chapter ( P < 0.05). ②In a number of indicators, it was found that the scores of the reform class were better than those of the control class 1 and the control class 2 ( P < 0.05); ③In the terms of excellent grade and good grade, the teaching reform class was ahead of the control class 1 and the control class 2, and none of students in the teaching reform class failed the graduation design (thesis). In the terms of questionnaires and seminars: TEBMCL teaching mode was carried out for juniors who had professional basic knowledge, with short prcoess and high efficiency, while this method still needed to be improved. Conclusion:The new TEBMCL teaching mode has significant advantages compared with the traditional teaching mode, which can better promote the cultivation of students' abilities and improve the degree of knowledge mastery.

Objective:A multi-center and large sample volume study was conducted on the verification and improvement of the early established criteria for intelligent routine urinalysis validation (including the microscopic review rules and manual validation rules, referred to as intelligent criteria for short), in order to improve the clinical application of this intelligent criteria.Methods:A total of 31 456 urine specimens were collected from the inpatients and outpatients in six hospitals in China, from March to September 2019. Firstly, 3105 specimens were analyzed for preliminary verification and improvement of the intelligent criteria based on the results of the microscopic examination and manual validation. Secondly, 28 351 specimens were used to verify the clinical application of the improved intelligent criteria. All samples were manually validated as reference.Results:The approval inconsistency rate of the manual validation rules in the original intelligent criteria was 8.59% (202/2 352), and the interception inconsistency rate was 8.84% (208/2 352). The false negative rate and the microscopic review rate of the microscopic review rules were similar to the previous results. Based on an in-depth analysis of big data and the discussions by senior technicians from eight hospitals, one microscopic review rules and four manual validation rules were added, meanwhile two manual validation rule was deleted. The manual validation standards were unified. Finally, the intelligent criteria was improved. Based on the improved intelligent criteria, for microscopic review rules, the false positive rate, false negative rate (misdiagnosis rate), and microscopic review rate did not change significantly, which were 14.72% (457/3 105), 4.06% (126/3 105), and 24.73% (768/3 105), respectively. The approval inconsistency rate and the interception inconsistency rate of manual validation rules were both reduced to 0; the total manual validation rate of the intelligent criteria was 50.89% (1 580/3 105), and the auto-validation rate was 49.11% (1 525/3 105). The large sample volume verification results were consistent with the preliminary verification results of the improved intelligent criteria.Conclusion:This multi-center and large sample volume study had shown that the improved intelligent criteria had better clinical performance.

Polymeric micelles have exhibited attractive properties as drug carriers, such as high stability in vivo and good biocompatibility, and been successfully used to dissolve various drugs of poor aqueous solubilities. In this study, we developed a new type of polymeric micelles with mannose-mediated targeting and pH-responsive drug release properties for anticancer drug delivery. The polymeric micelles were prepared from an amphiphilic polymer, poly (glycidyl methacrylate)-g-mannose (PGMA-Mannose). An anticancer drug, doxorubicin (DOX), was encapsulated into the micelles during the micellization, and could be released rapidly under acidic condition. The specificity of cellular uptake of the micelles by two different cell lines was studied using confocal laser scanning microscopy and the MTT assay. DOX-loaded micelles were efficiently trapped by mannose-receptor-overexpressing cancer cells MDA-MB-231, whereas mannose- receptor-poor cells HEK293 showed much lower endocytosis towards the micelles under the same conditions. Thus, DOX-loaded micelles displayed higher cytotoxicity to MDA-MB-231 cancer cells as compared with free DOX. The present study demonstrates that PGMA-Mannose micelles are a promising targeted drug delivery system for cancer therapy.
Cell Line, Tumor ; Doxorubicin ; pharmacology ; Drug Delivery Systems ; HEK293 Cells ; Humans ; Lectins, C-Type ; metabolism ; Mannose ; chemistry ; Mannose-Binding Lectins ; metabolism ; Micelles ; Receptors, Cell Surface ; metabolism