Showing 3 results for Microrna
Samira Shakerizadeh, Mohammadi Shekari, Abdolazim Nejatizadeh, Aliakbar Poursadegh Zonouzi, Hedieh Fardmanesh, Ahmad Poursadegh Zonouzi,
Volume 4, Issue 2 (10-2016)
Abstract
Background and objectives: Deregulation in the expression of microRNAs is involved in the pathogenesis of various malignancies. Impaired microRNAs processing pathway is one possible mechanism for global deregulation of the miRNAs. Exportin 5 (XPO5) is a key member of this pathway that links nuclear and cytoplasmic steps of miRNAs biogenesis together. XPO5 deregulation has been reported in some cancers but very little is known about its role in breast cancer. Therefore, this study aimed to evaluate the mRNA expression of XPO5 in breast cancer in an Iranian population.
Methods: In this case-control study, 30 tumoral tissues and 30 tumor-free margins were collected from breast cancer patients. After RNA extraction and cDNA synthesis, XPO5 mRNA expression level was assessed using quantitative Real-Time PCR.
Results: Our results showed that XPO5 was overexpressed in 53.3% of tumoral tissues but the difference in the gene expression level between tumoral tissues and tumor-free margins was not statistically significant (P-value=0.834). XPO5 expression level showed no statistically significant correlation and association with clinical and pathological parameters.
Conclusion: Overexpression of XPO5 in large percent of patients indicates that high level of XPO5 expression may be a tumorigenic factor for breast cancer which needs to be investigated more deeply.
Hamid Reza Zolfi, Amir Shakib, Zahra Niknam, Zhaleh Pashaei,
Volume 11, Issue 3 (12-2023)
Abstract
Background: Metabolic syndrome, a problem of the present age, is a combination of several medical issues, and miRNAs play important regulatory roles in metabolic syndrome. Many studies indicate that high-intensity interval training (HITT) may improve risk factors for metabolic syndrome.
This study aimed to investigate the effect of 8 weeks of HIIT training on the changes in miR-21, miR-122, alanine aminotransferase (ALT), aspartate aminotransferase (AST), low-density lipoprotein (LDL), lipid profile, and glucose.
Methods: In this quasi-experimental study, middle-aged male (n=19) volunteers with metabolic syndrome (body mass index (BMI)>30) were randomly assigned to the control (n=9) and training (n=10) groups. The training program consisted of 8 weeks of HIIT training with 4 sets of workouts with an intensity of 80-90% heart rate for the training group (3 sessions per week during the first 4 weeks and 4 sessions per week during the second 4 weeks). Blood samples were collected from the subjects 48 hours before and after the last training session to analyze miR-21, miR-122, ALT, AST, HDL, LDL, triglyceride, cholesterol, and glucose. The within-group and between-group differences of data were analyzed using the paired t-tests and analysis of covariance at a significance level of P˂0.05 in SPSS software.
Results: This study indicated that HIIT caused a significant decrease in miR-122, ALT, AST, triglyceride, cholesterol, glucose, body weight indicators, fat percentage, and BMI (P˂0.05). Also, a significant increase in miR-21 and HDL levels was observed following HIIT training (P˂0.05).
Conclusion: HIIT training seems essential in metabolic changes, such as reducing the lipid profile, decreasing glucose, and improving liver damage by affecting miR-21 and miR-122 indicators as small regulatory transcripts. However, more extensive studies are needed in this field.
Fatemeh Abbasi , Nazanin Mortazavi , Nasser Behnampour , Masoud Mohammadi, Saeed Mohammadi,
Volume 11, Issue 4 (12-2023)
Abstract
Background: Oral cancer is the sixth most common cancer in the world and the third most common cancer in developing countries. Early detection of oral cancer can reduce mortality in several ways. The aim of the present study was to combine the quantitative results of various studies concerning serum and salivary microRNAs for early diagnosis of head and neck squamous cell carcinoma (HNSCC).
Methods: This systematic review and meta-analysis was conducted based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) Guideline. We searched all the relevant English studies in international databases of PubMed/Medline, Scopus, Web of Science, Cochrane, ProQuest, Embase, and Wiley until February 2022. A random-effects model was used to estimate the pooled odds ratio (OR) and its corresponding 95% confidence interval (CI) for each study. A total of 672 articles were found. After screening, 93 articles were approved for systematic review. Finally, 5 completely relevant articles were examined in the meta-analysis.
Results: Considering all studies regarding miRNAs, the combined results indicated that AUC = 0.73, with a sensitivity of 71.68% and a specificity of 69.95%, could be used for HNSCC diagnosis. Due to the moderate sensitivity and specificity of miRNAs, they may be able to confirm or exclude suspected cases of this disease, enhancing their utility as clinical diagnostic indicators.
Conclusion: The available data provide evidence that miRNAs, especially MiR-31 expression in the saliva, serum, or plasma, can be used as a diagnostic biomarker for HNSCC patients. However, controlled clinical trials with large sample sizes are needed to validate different miRNAs.
