The teachers′ experience of nursing practice teaching collaboration between Guangdong and Macao under the background of Guangdong-Hong Kong-Macao Greater Bay Area / 中国实用护理杂志

Objective:To explore the experience of teachers from Guangdong and Macao in nursing teaching cooperation, the existing problems in current teaching cooperation and suggestions for improvement.Methods:From January to April 2021, using descriptive qualitative method to conduct in-depth among eight clinical tutors from The Third Affiliated Hospital of Guangzhou Medical University who teach Macao nursing students, and four teachers from Kiang Wu Nursing College of Macao using the purposive sampling method. And adopted content analysis for data analysis.Results:A total of 4 themes and 2 sub-themes were analyzed: the positive impact of cross-border teaching cooperation projects including developed the nursing business of the two places and deepened the cooperative relationship between the two places; limiting the depth and breadth of knowledge transfer because of the short cross-border learning time; the imbalance between students′ abilities and teachers′ expectations; expectations for homogeneous internships for heterogeneous groups.Conclusions:Cross-border nursing teaching cooperation is an important promoter for the development of nursing education between Guangdong and Macao, but there are still deficiencies in cooperation, and it is necessary for the two places to strengthen the construction of a sharing platform for teaching resources to promote the development of nursing education in the Guangdong-Hong Kong-Macao Greater Bay Area.

Expression and clinical significance of ARHGAP4 in colorectal cancer / 实用医学杂志

Objective To study the expression and clinical significance of ARHGAP4 in colorectal cancer Method Real?time PCR,Western blot and immunocytochemistry were used to detect the expression of ARHGAP4 in colorectal cancer tissues and cell lines ,and the correlation between its expression and clinical features of patients was analyzed Results ARHGAP4 is overexpressed in colorectal cancer tissues and cell lines and its overexpression is correlated with T stage, N stage, clinical stage, and metastasis. Conclusion ARHGAP4 may promote the progression of colorectal cancer ,and have the potential to be a novel prognosis marker.

Study of miR-4770 as a diagnostic markers for colorectal cancer / 实用医学杂志

Objective To identify specific miRNAs from the differentially expressed miRNAs as diagnose marker for colorectal cancer (CRC). Methods The expression levels of miRNAs in CRC and the adjacent tissues were detected by qRT-PCR and the candidate miRNAs with statistic significance were selected. Receiver-operating-characteristic curve was performed to analyse the specificity and sensitivity of miR-4770. Results A total of 102 significantly dysregulated miRNAs were identified , and 92 of them were down-regulated , 10 of them were up-regulated. The specificity of miR-4770 to discriminate moderated differentiated CRC from adjacent normal tissues was 71.43%, with the sensitivity of 95.24% and area under cure of 0.952 4. Conclusion miR-4770 can be potentially served as a diagnostic and prognostic biomarker for CRC.

Genomics analysis of miRNA in colon cancer tissues / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To examine the differential expression of miRNAs in colon cancer tissues and matched tumor adjacent tissues.</p><p><b>METHODS</b>Differential expression of microRNAs in twenty paired human colon cancer tissues and adjacent tissues were detected by QPCR. miRNAs with significantly differential expression (fold change >2.4 and P<0.01) were screened to analyze their accumulation by Cluster analysis. Thus correlation of miRNA and other colon cancer-associated proteins was examined.</p><p><b>RESULTS</b>Expressions of 17 miRNAs were significantly reduced in colon cancer tissues. Cluster analysis showed that miR763-3, miR451 and miR99a had similar expression. Plasma CK20 level was negatively correlated with miR100 (r=-0.948), miR152a-5p (r=-0.948), miR125b (r=-0.949), miR145 (r=-0.949) and miR145*(r=-0.949) (all P<0.05).</p><p><b>CONCLUSION</b>miR145 and other 16 miRNAs may be used as diagnostic molecular markers of colon cancer, and miR100, miR125a-5p, miR125b, miR145 and miR145* may become the molecular markers of colon cancer lymph node metastasis.</p>

Study on miR-490-5p and miR-363 as novel biomarkers for the diagnosis of colorectal cancer / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To identify dysregulated microRNA(miRNA) that can act as novel biomarker for colorectal cancer screening.</p><p><b>METHODS</b>Real time-polymerase chain reaction was used to detect the expression profile of miRNA in tumor and paired normal tissues, and the significant dysregulated miRNA was examined by non-paired t-test. Receiver operating characteristic(ROC) curve was performed to evaluate the specificity and sensitivity of miR-363 and miR-490-5p as biomarkers to discriminate colorectal cancer patients from normal person.</p><p><b>RESULTS</b>Seven-three dysregulated miRNAs were found in male samples, of which 6 miRNAs were up-regulated and other 67 miRNAs were down-regulated, while 42 dysregulated miRNAs were found in female samples, of which 5 were up-regulated and 37 were down-regulated in tumor tissues compared with normal tissues. Among above dysregulated miRNAs, 33 miRNAs had significant differences, besides, dysregulated expression level of 10 of 33 miRNAs was over 5 folds in male and female as well as mixed samples.</p><p><b>CONCLUSIONS</b>The expression pattern in female is different from that in male. miR-363 and miR-490-5p possess the potential in screening colorectal cancer patients from healthy people.</p>

The expression level of miR-125a-5p in colorectal cancer with various differentiation / 肿瘤研究与临床

Objective To identify the expression level of miR-125a-5p in colorectal cancer (CRC) with various differentiation,and to investigate its diagnostic significance.Methods Real-time polymerase chain reaction was used to analyze the expression level of miR-125a-5p in tumors and paired normal tissues of different differentiated CRC.Receiver-operating-characteristic (ROC) curve was performed to evaluate the specificity and sensitivity of using miR-125a-5p as biomarkers to discriminate CRC patients from normal persons.Results Compared with normal tissues,miR-125a-5p was down-regulated in both high and moderate differentiation,miR-125a-5p could distinguish CRC from normal persons with high sensitivity and specificity,which were 80.00 ％ and 90.00 ％,respectively.Conclusions miR-125a-5p down-regulated in CRC indicates that miR-125a-5p contributes to tumorigenesis,and may be a potential biomarker for CRC.

Role of centromere protein H in human gastric cancer cell proliferation / 南方医科大学学报

<p><b>OBJECTIVE</b>To explore the role of centromere protein H (CENP-H) in the proliferation of human gastric cancer cells.</p><p><b>METHODS</b>RT-PCR and Western blot analysis were employed to examine the mRNA and protein expressions of CENP-H in 7 human gastric cancer cell lines and immortalized human gastric epithelial cells (GES-1). The cells were infected with the retrovirus vectors pMSCV-CENP-H or CENP-H-RNAi to establish stable cell lines with high CENP-H expression or CENP-H expression interference. MTT assay and colony formation assay were used to examine the changes in the cell proliferation after the infection.</p><p><b>RESULTS</b>CENP-H was over-expressed in gastric cancer cell lines AGS, BGC823, SGC-7901, MKN45, HGC27, MGC-803 and MKN28 at both mRNA and protein levels. The established AGS/CENP-H cell line with increased CENP-H expression showed enhanced proliferative activity, while the cell line MGC-803/CENP-H-RNAi with CENP-H expression interference showed an obviously lowered proliferation ability.</p><p><b>CONCLUSION</b>CENP-H promotes the proliferation of human gastric cancer cells, suggesting its important role in the occurrence and development of gastric cancer.</p>

Isolation and purification of pig islet cells / 国际外科学杂志

Objective To establish effective method for large-scale purification of islet cells from pig pan-cress. Methods Pig pancreas tissue was digested with collagenase P followed by purification in a HCA-Fi-coil dis continuous gradient using Cobe2991 cell separator. After isolation, the islet cell yield and purity were evaluated with light microscope with DTZ staining, and the islet function assessed by insulin release as-say in vitro. Results The number of the islets coll ected from each pancreas averaged (275 000±20 895)islet equivalents (IEQ) before purification, and (230 350±26 679) IEQ after the purification with discon-tinuous gradient centrifugation. From each gram of the pancreatic tissue, (2710±229) IEQ were obtained with an average purity of (50.2±1.95) %. The purified islets responded well to high-concentration (16.7 mmol/L) glucose stimulation with a 4. 74-fold increase of insulin secretion over the basal level (3.3 mmol/L, P <0.001). Conclusion The established method can be applicable for large-scale purifi-cation of fully functional islet cells from pig pancreas.