Investigation of Long Non-coding RNA HOX A11-AS Expression in Iranian Patients with Glioblastoma: A Quantitative Study

Background and Objectives: Glioblastoma is one of the most malignant and common brain tumors, accounting for about half of all gliomas. Glioblastoma is a central nervous system tumor that originates from the glial tissue of the brain. The present study aimed to investigate changes in the expression of long non-coding RNA HOXA11-AS as a possible biomarker in glioma.   Methods: For the purposes of the present study, first, the medical records of the patients in Imam Hossein Hospital in Tehran, Iran were reviewed. The ethical considerations were respected as well; accordingly, written informed consent was obtained from the patients and the code of ethics was achieved as well. Finally, the paraffin blocks, including the biopsy of brain tumor tissue of the patients who referred to Imam Hossein Hospital during 2015-17 were collected and their degrees were confirmed by the pathologist. In total, 50 samples of grades 1 and 2 as well as 50 samples of grades 3 and 4 were examined in this research project. The RNA extraction and cDNA synthesis were performed for all the tissue samples donated by the patients. Subsequently, a specific primer and probe were designed and the expression of the HOXA11-AS gene was investigated using real-time polymerase chain reaction technique. The mean age of the subjects was 43.70±16.416 years. The collected data were analyzed in SPSS software (version 20) using descriptive and analytical statistics. Moreover, the expression levels of this gene in lower- and higher-grade tumor tissues were compared using the unpaired samples t-test.   Results: Based on the results, the tumor samples with grade three and four underwent a 2.76 fold increase in expression (fold change), compared to tumor samples with grade one and two. This difference was statistically significant.   Conclusion: Based on the findings, it can be concluded that the expression of the HOXA11-AS gene has a significant positive relationship with the degree of disease (P=0.0002)

International aspects in healthcare and medical education: Scientometric trends and knowledge maps before the COVID-19 pandemic

BACKGROUND: Literature shows that healthcare and medical education are associated with the countries/institutes' developments, and reviewing the global patterns can shed light on various aspects of this competition. The study aims to investigate the current research aspects on the internationalization of healthcare and medical education and assess its trends worldwide. MATERIALS AND METHODS: In this descriptive study, based on documents in Web of Science (n = 609), PubMed (n = 395), and Scopus (n = 6598), scientometric methods and knowledge visualization techniques were applied to evaluate global scientific production and trends from 1900 to 2020. Results were preprocessed in BibExcel (version 2016-02-20) to create a mapping file, and word co-occurrence analysis was applied to evaluate the publications. Scientific maps, authors' networks, and countries'/institutes' contributions were depicted using VOS (Visualization of Similarity) viewer and NetDraw. For trend analysis, highly frequent words were examined at intervals before 2000, 2000–2004, 2005–2009, 2010–2014, and 2015–2019. RESULTS: Altogether, 129 countries and 14536 (co)authors with 7007 affiliations contributed to the production of 6895 documents. Of the 2378 journals, the top 20 journals published 1298 (18.83%) articles. The top 20 authors together contributed to 247 papers (3.58%). High-income countries made up the most prolific nations. Also, institutes from North America, Europe, and Oceania pioneered production and cooperation. Highly co-occurring words were international cooperation, medical education, medical school, curriculum, medical research, and medical students. CONCLUSION: The countries/institutions' efforts in internationalizing healthcare and medical education are reflected in the publications in the databases of Web of Science, PubMed, and Scopus. Thus, the findings offer evidence-based information about past and present trends and help researchers and policymakers understand their global impact