Objective:To analyze the different expressions of miRNAs in peripheral blood of rheumatoid arthritis (RA) patients and the osteoclasts in rats,and to verify the key miRNAs in RA.Methods: The miRNAs expressions in monocyte and the co-cultured osteoclasts,peripheral blood of rheumatoid arthritis (RA) patients and normal were detected by miRCURYTM LNA Array.Real time PCR was applied to verify the reliability of miRNA array.The bioinformatics software and database were applied to predict and analyze target genes.Results: miRNA array results showed that 189 miRNAs changed in RA patients compared with the normal;211 miRNAs were changed in osteoclasts group compared with monocytes group.The expressions of ten miRNAs were all abnormal in RA patients and osteoclasts in rats.The results of Real time PCR were consistent with the array.Results of bioinformatics analysis showed that the target gene of miRNA significantly enriched in signaling pathways such as VEGF,MAPK signaling pathways.Conclusion: Some miRNAs had similar abnormal expressions in different species,and these miRNAs may influence the differentiation of the osteoclasts through regulating the related signal passways.

Objective To explore the change rules of peak area ratio of STR loci to Amelogenin (AMEL) locus (STR/A M EL ), a sex-determ ining gene in DNA degradation, and to evaluate the application of STR/A MEL value in the estim ation of DNA degradation degree. Methods DNA w as extracted from iliopsoas, and the variations of STR/A MEL value (Penta E/AMEL, Penta D/AMEL, FGA/AMEL) w ere analyzed after the artificial degradation w as m ade by DNaseⅠ, and the changes of these three ratios of the iliopsoas naturally degraded in an outdoor environm ent w ere also analyzed. The regression curves w ere analyzed using the periods of DNA degradation and outside the body as the independent variable (x) and the STR/A MEL value as the dependent variable (y) and three curve equations under tw o conditions w ere established. Results B oth under the conditions of artificial and natural degradation, STR/A MEL value had a negative relationship w ith the degradation tim e. The relationship betw een STR/A MEL and degradation tim e can be w ell sim ulated by the cubic function. R2 w as over 0.99 under controlled degradation condition and over 0.86 under natural degradation condition. Conclusion The STR/A MEL value (Penta E/AMEL, Penta D/AMEL , FGA/AMEL ) is negatively related w ith the DNA degradation degree, w hich follow s m athem atical regression m odels strictly, and it m ight be applied to evaluate the DNA degradation degree.

DNA typing of biological samples is an important step in performing individual identification and paternity testing in forensic applications. In practice, the detection of complex biological samples and the identification of complex kinships are challenging current biological technologies. Novel DNA technologies are also introduced into forensic genetics to improve the power of analysis. Next-generation sequencing (NGS) has several advantages, such as high-throughput and low cost, and can obtain detailed DNA sequences and relative contents of targeted regions, which will improve the detection of biological samples to help the analysis of forensic cases. The application of NGS in forensic genetics has received extensive attention and reports on the application of NGS in forensic genetics are increasing. In this study, we summarized the progress in the application research of NGS in the forensic genetics including the detection of genetic markers and their analytical methods. This will provide guides for related studies and forensic applications.

Objective:To evaluate the effectiveness of staged modular theory and practice lectures in laparoscopic training.Methods:In this study, a large group of medical students and a large group of residents were selected, and each of the two groups was divided into an experimental group and a control group respectively. The experimental group received staged modular theory and practice lectures based on the conventional trainings, and the control group only underwent conventional laparoscopic skills training and instruction. Before and after the training, the completion time of 6 basic laparoscopic operations, laparoscopic suture time, suture quality and the number of accidental injuries were recorded and scored in each group according to the assessment criteria. SPSS 26.0 was used for statistical analysis of the assessment data. Independent samples t-test or Mann-Whitney U test was used for inter-group comparison between the two large groups, and paired samples t-test or Wilcoxon sign rank sum test was used for intra-group comparison before and after the training. Results:Compared with the control group, the experimental group of medical students that had undergone staged modular theory and practice lectures had a shorter time to complete basic laparoscopic operations, faster speed of suturing ( t=6.18, P<0.001) and higher quality of suturing ( t=4.17, P<0.001) and fewer accidental injuries ( Z=-2.03, P=0.043); the experimental group of residents that had undergone staged modular theoretical and practical lectures had a shorter time to complete basic laparoscopic operations, faster speed of suturing ( t=3.31, P=0.002) and higher quality of suturing ( t=3.68, P=0.001) and fewer accidental injuries ( Z=-2.44, P=0.015). Conclusion:The staged modular theory and practice lectures are able to further improve the quality of basic laparoscopic skills training.

ObjectiveTo explore the diagnostic value of fiberoptic endoscopic examination of swallowing (FEES) combined with dye test in patients with post-stroke dysphagia and silent aspiration. MethodsFrom December, 2021 to June, 2022, 50 stroke patients in the Rehabilitation Department of Xuzhou Central Hospital were selected. They were assessed with FEES and videofluoroscopic swallowing study (VFSS), and compared. ResultsThe detection rate of aspiration was higher with FEES than with VFSS (χ² = 7.000, P < 0.05), and especially for liquid food (χ² = 4.000, P < 0.05). There was a good consistency when consuming paste food (κ = 0.941, P < 0.001) and solid food (κ = 0.779, P < 0.001). There was a good consistency in the food residue site between two methods (κ = 0.818, P < 0.001), as well as for all the three food types (κ ≥ 0.862, P < 0.001). There was no significant difference in the scores of Penetration Aspiration Scale of three food types between two methods (Z < 0.667, P > 0.05). ConclusionFEES combined with dye test can be used for evaluating silent aspiration after stroke.