Journal of Arak University of Medical Sciences

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Showing 6 results for Microrna

Bioinformatic Evaluation of the MiR-124 Effect on Transcription Factors Involved in Neorogenesis Process

Mahdieh Mondanizadeh, Ghasem Mosayebi, Ehsan Arefian, Massoud Saidijam, Behzad Khansarinejad,
Volume 17, Issue 2 (5-2014)

Abstract

Background: Although miR-124 molecule has been known as an inducer of neurogenesis, few researches have been done on the targets of this molecule and its functional mechanisms in differentiation toward neurons and maintaining neuronal state. The microarray technique has been established as the reference method for studying the genes under the control of miRNAs. However, the high cost of this method has hampered its use in most research centers. On the other hand, the improvement of bioinformatical algorithms and computer modeling systems has led to the development of the bioinformatical softwares that can predict mRNA targets for miRNAs. Therefore, the aim of this theoretical study was to bioinformatically evaluate the effect of miR-124 on transcription factors that can be involved in neurogenesis and neuronal cell amplification, by using various specific softwares. Materials and Methods: Using different algorithms in TargetScan, DIANA and miRWalk databases, the potential transcription factors targets of miR-124 were identified. Then, a score table was prepared from the candidate genes, based on the affinity of the seed region of miR-124 and the number of targets in the 3`-UTR region of transcription factors. Finally, transcription factors with higher scores were chosen as candidates for practical analysis.

Results: The results of bioinformaical analysis showed that the LAMC1, ITGB1, PTBP1, SOX9, SP1, and EFNB1 molecules are the most potential factors that might be affected by miR-124 during neurogenesis.

Conclusion: It seems that transcription factor SP1 is under the control of the miR-124 and plays a crucial role in neurogenesis process. Therefore, this protein can be considered as a suitable new candidate for experimental evaluation.

The Effect of Eight Week of High Intensity Interval Training on Expression of Mir-210 and EphrinA3 Mrna in Soleus Muscle Healthy Male Rats

Ahad Shafiee, Mohamadreza Kordi, Abbasali Gaeini, Masoud Soleimani, Amin Nekouei, Vahid Hadidi,
Volume 17, Issue 3 (6-2014)

Abstract

Background: Mir-210 is proangiogenic microRNAis endothelial cells. This microRNA, causes the repression of some genes and proteins target so cause angiogenesis process. The purpose of this study was to determine the effect of a High Intensity Interval Training (HIIT) on Mir-210 and EphrinA3 receptor genes expression in soleus muscles of male rats.

Materials and Methods: In this experimental study, Twelve Wistar male rats(ageof eightweeks, average weight of 210.5±9.77)were randomly divided into exercise(n=6)and control (n=6) groups. High Intensity Interval Training was formed five days a week for eight weeks to taly including three Intervals (four minutes with an intensityof 90 to 100%VO2max and two minutes with an intensityof 50 to 60%VO2max).24 hours after exercise protocol, the rats were dissected and separated soleusmuscle. Mir-210 and EphrinA3receptor genes expression was performed by Real Time-PCRtechnique. Mir-210 and EphrinA3receptor genes expression were calculated by using the2∆∆CT and in dependentt-test to determine the significance of variables.

Results: Results showed that HIIT there had no significant effects on Mir-210 gene expression (p=0.16) Whe ars EphrinA3 gene expression in the exercise group was statistically significant (p=0.000).

Conclusion: It seems that a non-significant increase of Mir-210 and reduce in EphrinA3 gene expres sion, causes proangiogenic Operation ofendothelial cells and an increase in VO2max of rats following eight weeks of HIIT performance can be due to increased angiogenesis process.

Bioinformatic Prediction of miRNAs Targeting NOTCH1 and HBx Genes in Chronic Hepatitis B-Induced Hepatocellular Carcinoma

Niloofar Moradi, Mehdi Paryan, Behzad Khansarinejad, Mohammad Rafiei, Mahdieh Mondanizadeh,
Volume 19, Issue 12 (3-2017)

Abstract

Abstract

Background: Hepatocellular carcinoma (HCC) is the third major cause of cancer death worldwide. Hepatitis B virus (HBV) and HBx gene play an important role in the development of HCC by influencing signaling pathways. Since there is no detectable symptom in the early phase of HCC, there is need to find new HCC-specific markers with high sensitivity for early detection and diagnosis of HCC. On the other hand, by the advent and development of bioinformatic sciences, it is now possible to predict miRNAs as biomarkers, and their targets. Therefore, in the present study, based on the results of the bioinformatic software applications with different algorithm, we selected the miRNA targeting HBx and NOTCH1 mRNAs according to higher score, suitable connection with target gene and confirming them in more softwares.

Materials and Methods: First, the sequences of NOTCH1 and HBx genes were retrieved from NCBI. Afterwards, several software applications such as TargetScan, mirWalk, miRBase, Miranda, PicTar, miRVir, and DIANA were applied to predict miRNAs.

Results: Based on the high scoring by bioinformatics softwares and suitable targeting, miR-34a were selected to target NOTCH1 and miR-6510, miR-5193 and miR-214 were chosen to targetHBX gene.

Conclusion: Because of tumor suppression roles of miR-214 and miR-34a, they probably could be used as therapeutic strategy in cancer researches. It is also seems that the miR-5193 could act as a specific marker in Hepatocellular carcinoma.

Bioinformatic prediction and introducing of some targeting microRNAs of Sirt1 and Bcl2 genes in model of Parkinson's disease

Mahsa Rostamian Delavar, Masoud Baghi, Elahe Yadegari, Kamran Ghaedi ,
Volume 20, Issue 8 (11-2017)

Abstract

Abstract
Background: Oxidative Stress and mitochondrial dysfunction leading to apoptotic death of neurons play key role in the pathogenesis of the Parkinson's disease. On the other hand، misregulation of microRNAs can cause several neurodegenerative diseases. Sirt1 and Bcl2 as two key genes, regulate pathogenic processes in neurodegenerative diseases such as mitochondrial dyfunction, oxidative stress and apoptosis.
Materials and Methods: To investigate the role of microRNAs in model of Parkinson's disease, miRWalk 2.0 and TargetScan (v7) databases were served to predict microRNA-target interactions.
Results: Possible targeting effects of different microRNAs on Bcl2 and Sirt1 genes in Rat organism were analyzed. Merging data from databases has shown that rno-miR-449a, rno-miR-182, rno-miR-211, rno-miR-34b, rno-miR-34c, rno-miR-448, rno-miR-466b and rno-miR-96 with strong possibility can inhibit expression of Bcl2 gene. Also, rno-miR-181, rno-miR-211, rno-miR-27a, rno-miR-449a, rno-miR-34c, rno-miR-30, rno-miR-200a and rno-miR-448can inhibit Sirt1 gene with high possibility.
Conclusion: According to the findings, it can be predicted that regarding to high interaction scores of rno-miR-211, rno-miR-34c and rno-miR-448 and 449awith Bcl2 and Sirt1 genes in above-mentioned databases, these microRNAs probably can have critical role in disease process. Thus, these microRNAs can be introduced as appropriate candidates for investigations in in vitro model of Parkinson's disease.

Bioinformatic Prediction of miRNAs Targeting APRIL and BAFF Genes in Chronic Lymphocytic Leukemia

Mahdieh Mondanizadeh, Niloofar Moradi, Razieh Amini, Behzad Khansarinejad, Ghasem Mosayebi,
Volume 22, Issue 5 (11-2019)

Abstract

Background and Aim Chronic Lymphocytic Leukemia (CLL) is the most commonly occurring leukemia in adults, accounting for about 30-25% of total leukemia. One of the important etiological causes of this leukemia is the disruption of the Nuclear Factor Kappa B (NF-kB) signaling pathway. The two proteins of Apoptosis-Inducing Ligand (APRIL) and B-Cell Activating Factor (BAFF) play a role in the pathogenesis of this leukemia by affecting the NF-kB signaling pathway. In this study, due to the effect of miRNAs in regulating many cellular processes, the prediction of the prominent miRNAs targeting APRIL and BAFF transcripts in B-cell CLL patients was evaluated using specific and different bioinformatics programs.
Methods & Materials Afterwards retrieving the sequences of APRIL and BAFF proteins from the NCBI website, by using several programs including miRanda, TargetScan, miRWalk, DIANA and miRDB with different algorithms, the prediction of miRNAs targeting these genes was investigated.
Ethical Considerations This study was approved by the Research Ethics Committee of Arak University of Medical Sciences.
Results Based on the scoring system of bioinformatics programs, “hsa-miR-145-5p” and “hsa-miR-185-5p” were identified as miRNAs targeting APRIL gene, while “hsa-miR-424” and “hsa-miR-497”were miRNAs targeting BAFF gene. They were suggested for the practical studies in future.
Conclusion Based on the important role of APRIL and BAFF genes in the normal process of cell death and B-cell evolution, it seems that the mi-RNAs predicted by bioinformatics programs using different algorithms can be used as a diagnostic molecular biomarker to identify B-cell CLL patients.

Effect of a Lower Limb Restless Period on Expression of Mir-1 and Mir-206 Neural Muscle Genes in Endurance Training Rats

Mahboubeh Sheikhan, Mohammad Reza Kordi, Hamid Rajabi,
Volume 23, Issue 4 (9-2020)

Abstract

Background and Aim: Several microRNAs are involved in regulating muscle mass, which plays an essential role in hypertrophy and atrophy of skeletal muscle, The present study examined the expression of some genes as regulators of muscular atrophy following a period of inertia in rats.
Methods & Materials: For this purpose, 18 male Sprague-Dawley rats were divided into three groups (Control, Exercise+inactivity, and Inactivity). The exercise+inactivity group run on the treadmill for 18 weeks and five times per week. The hindlimb of the animal was immobilized for seven days with the casting method. Soleus muscle was extracted and the expression of the genes was measured by the RT-PCR method. Univariate ANOVA and Tukey post hoc test was used to determine the differences (α=0.05).
Ethical Considerations: The Ethics Committee of the Tehran University of Medical Sciences Research approved this study (Code: IR.SUMS.REC.1396.S 463).
Results: Results showed that immobilization in both Exercise+ inactivity and inactivity groups, compare to the control group, increased expression of miR-1 genes (P<0.10), FOXO3a (P<0.001) and decreased expression of miR-206 (P<0.007) and IGF-1 (P<0.001). This difference was statistically significant.
Conclusion: According to the results of this study, it can be said that changes in the expression of RNAs by chromatography cause changes in the expression of muscle regulating genes, and although endurance exercises have protective effects, they cannot prevent these changes.

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