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Cancer stem cells are responsible for the formation the resistance to treatment, tumor relapse, and metastasis. miRNAs play an important role in the regulation of biological processes. Therefore, the purpose of this review is to candidate miRNAs that are involved in the regulation of all three properties including stemness, metastasis, and drug resistance and find their target genes and signaling pathways by using literature learning and data mining. The present systematic review is done to identify stemness-regulating miRNAs. By using CORMINE database, metastasis and drug resistance regulating miRNAs collected. Finally, we compared these three lists of miRNAs and found common miRNAs in these three properties. ONCO.IO database and KEGG pathway have been done to obtain the interaction between miRNA-miRNA target and cancer-related signaling pathway respectively. We collected 191 stemness-regulating miRNAs from 21 excluded studies. Based on CORMINE database, 161 miRNAs and 57 miRNAs had metastasis and stemness features respectively. We obtained 7 common miRNAs that 4 of them including has-miR-34a, has-miR-23a, has-miR-30a, has-miR-100 has a significant role for targeting signaling pathways involved in cancer and their most important targets regulate many processes of cells. These data suggest that three important properties can regulate by common miRNAs. Therefore, target these miRNAs or their targets can be helpful to stop tumor growth and metastasis and may be useful biomarkers for early detection of gastric cancer.

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Aim: Gastric cancer is the second common cause of cancer death worldwide. Cytokines are mediators of peptides that are involved in the regulation of immunological responses, inflammatory systemic responses, and repair responses to risk factors. Interleukins are cytokines that are produced on other lymphocytes. Interleukin-10, is one of the body's most important interleukin that to inhibit inflammatory and immune responses. Different polymorphisms are found in the promoter region of interleukin 10 gene, which by changing the rate of this gene expression, could been altered its function. In this present research, was studied of relation between (-1082G/A) polymorphism in interleukin 10 gene and gastric cancer.

Material and methods: Two groups consist of 50 patients and 50 controls, were selected as the study samples population and were taken blood samples from them. Next DNA extraction from samples, genotyping of this polymorphism was used by Tetra-ARMS-PCR. Then was analyzed the results.

Results: Samples genotyping was showed frequency of A and G alleles 74% and 26%, in patient groups and in control groups 68% and 32%, respectively. There was a significant association between GG genotype in this polymorphism and gastric cancer (P=0.013).

Conclusion: This study results shown that can be used (-1082G/A) polymorphism in interleukin 10 gene as a molecular biomarker for gastric cancer in Iranian patients’ population.

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Gastric cancer is one of the most common cancers in the world. Its treatments are costly and can cause severe side effects. As a result, treatments with natural compounds, well-established therapeutics, or combinations of both groups may be effective alternatives. p-Coumaric acid (pCA) and metformin (Met) are among such anticancer treatments. Epithelial-mesenchymal transition (EMT) is a multi-purpose process that plays a critical role in gastric cancer. This process involves a complex network of biological markers participating in gastric cancer initiation and metastasis. Subsequently, the agents downregulating the expression of EMT markers may be potential anti-gastric cancer therapeutics. Because the effects of pCA, Met, and their combination on the expression of EMT markers ZEB1, Snail2, Vimentin, and VEGFA have not been inspected, the present study aimed at assessing these effects. MTT assay determined the cytotoxicity of pCA and Met on the AGS cells for 48 hours. Real-time PCR was used to evaluate the changes in the expression levels of these EMT genes after 48 hours. A combination of pCA and Met downregulated the expression of ZEB1 and Vimentin genes at low, non-cytotoxic concentrations. Therefore, they may be potential candidates for further investigations in fighting against gastric cancer.
 

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Diagnosis of cell properties to separate healthy and damaged tissues, imaging and determination of cells’ shape and different surfaces are new applications of atomic force microscopy, which have extended using of the atomic force microscopy these days. In the manipulation modeling of micro/nanoparticles, using an atomic force microscope, one of the important points, is using an appropriate and accurate contact model. Since in the 3D manipulation, micro/nanoparticle is located between the cantilever and the substrate, therefore contact theories should be divided into two parts. The first section is the contact between the substrate and micro/nanoparticle, and the other section is the contact between micro/nanoparticle and the tip of the cantilever. In this research elasticity module of the gastric cancer cells has been measured using atomic force microscopy to diagnose cancerous tissue. To do so, two Hertz and JKR contact models have been developed to extract the elasticity module. In an experimental, after isolating the cells from the gastric cancer tissue, the specimens were tested using a rectangular beam and pyramidal and spherical needles under an atomic force microscope, and the force-depth graphs were obtained. Data analysis was performed. According to obtained results, the considered cell’s elasticity module has been approximated 325±25 kPa based on the curves obtained from the comparison of experimental data from atomic force microscopy and Hertz and JKR contact theories.

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introduction: Several risk factors for gastric carcinoma have been suggested, and human papillomavirus (HPV) infection is one of them. This virus, with more than 100 genotypes, is in the Papillomaviridae family. The present study was conducted to investigate the prevalence of human papillomavirus types 16 and 18 in gastric carcinoma patients in the Ardabil province.
Methods: This study is a case-control study in which 50 patients with stomach cancer and 50 healthy individuals were tested for papillomavirus type 16 and 18 DNA in their blood samples after DNA extraction by polymerase chain reaction (PCR).
Results: In the study conducted, the frequency of healthy men and women was 46% and 54%, respectively, and in sick people, it was 66% and 34%. The present study showed that in the population of Ardabil province, the frequency of human papillomavirus types 16 and 18 in gastric carcinoma patients was zero.
Conclusion: The current study on human papillomavirus types 16 and 18 in patients with gastric cancer shows a very low frequency in the population of Ardabil province.