ObjectiveTo detect expressions of transient receptor potential channel C5 (TRPC5) and microRNA-320a (miR-320a) in thyroid cancer and explore clinical significances of them in thyroid cancer.MethodsThe expressions of TRPC5 and miR-320a mRNA in the thyroid cancer were investigated by searching the Ualcan database. While the expressions of TRPC5 and miR-320a mRNA in 80 cases of thyroid cancer, 35 cases of thyroid adenoma and 32 cases of normal thyroid tissues adjacent to thyroid adenoma tissues in the Zhengzhou Seventh People’s Hospital from March 2014 to March 2015 were tested. Real time PCR was used to detect the expressions of TRPC5 mRNA and miR-320a mRNA in the various tissues and Western blot was used to detect the TRPC5 protein in the thyroid cancer tissues. Therelationships between the expressions of TRPC5 and miR-320a mRNAs and clinicopathologic features of thyroid cancer were analyzed. The correlation between expressions of TRPC5 and miR-320a mRNA was analyzed by Pearson method. The risk factors influencing the prognosis were analyzed by univariate and multivariate Cox proportional hazards regression model.ResultsThe results of Ualcan database showed that the expression level of TRPC5 mRNA in the thyroid cancer was higher than that in the normal thyroid tissue (P<0.001), while the expression level of miR-320a mRNA was lower than that in the normal thyroid tissue (P<0.001). The results of clinical cases showed that the expression level of TRPC5 mRNA was significantly higher, while the expression of miR-320a mRNA was significantly lower in the thyroid cancer tissues as compared with the normal thyroid tissues (P<0.05). There was a negative correlation between the expression level of TRPC5 and miR-320a mRNA in the thyroid cancer (r=−0.653, P<0.001). The expressions of TRPC5 and miR-320a mRNA were correlated with the degree of differentiation, lymph node metastasis, and TNM stage (P<0.05). Kaplan-Meier survival curve analysis found that the patients with higher expression level of TRPC5 and lower expression level of miR-320a showed the poor prognosis, and multivariate analysis found that the lower tumor differentiation, later TNM stage, with lymph node metastasis, higher expression level of TRPC5 mRNA, and lower expression level of miR-320a mRNA were the risk factors affecting prognostic survival (P<0.05).ConclusionsFrom the database and clinical case data, it is concluded that TRPC5 mRNA is highly expressed, while miR-320a mRNA is lowly expressed in thyroid cancer tissues, and expressions of TRPC5 and miR-320a mRNA are related to degree of tumor differentiation, lymph node metastasis, TNM staging, and prognosis in patients with thyroid cancer. TRPC5 and miR-320a mRNA might be used as potential indicators for clinical and prognostic monitoring.
Objective To systematically evaluate the correlation between the expression of microRNA (miRNA)-21 and the prognosis of esophageal cancer. Methods PubMed, Cochrane Library, Embase, Wanfang Data, China National Knowledge Infrastructure and VIP Databases were searched by for the literature on the correlation between miRNA-21 and the prognosis of esophageal cancer till July 10, 2022. Two researchers independently performed literature screening, quality evaluation, and data extraction. Statistical analysis was conducted with Stata 14.0. Results A total of 13 articles were included, including 1 204 patients. The results of meta-analysis showed that: the overall survival (OS) of patients with high expression of miRNA-21 was lower than that of patients with low expression of miRNA-21 [hazard ratio (HR)=2.11, 95% confidence interval (CI) (1.56, 2.84), P<0.001]. miRNA-21 expression was not associated with disease free survival [HR=2.53, 95%CI (0.67, 8.22), P=0.182]. The OS of Asian patients with high expression of miRNA-21 was significantly lower [HR=2.44, 95%CI (1.71, 3.49), P=0.005], while the OS of non-Asian patients was not related to miRNA-21 expression [HR=1.34, 95%CI (0.94, 1.91), P=0.363]. The high expression of miRNA-21 was correlated with the decreased OS in patients with esophageal squamous cell carcinoma [HR=2.22, 95%CI (1.52, 3.26), P=0.001], while the OS in patients with esophageal adenocarcinoma was not correlated with the expression of miRNA-21 [HR=1.39, 95%CI (0.63, 3.06), P=0.409]. Conclusion The overexpression of miRNA-21 is associated with poor prognosis and might be regarded as a potential prognostic biomarker for patients with esophageal cancer.
Objective To summarize the research progress of microRNA (miRNA) and its non-viral vector in intervertebral disc degeneration (IDD) and to investigate the potential of non-viral vector delivery of miRNA in clinical application. Methods The related literature about the role of miRNA in IDD and its non-viral delivery system was reviewed and analyzed. Results MiRNA can regulate the related gene expression level and further participate in the pathophysiologic process in degenerated intervertebral disc, miRNA delivered by various non-viral vectors has obtained an ideal effect in some diseases. Conclusion MiRNA plays a great role in the cellular and molecular mechanisms of IDD, as a safe and effective strategy for gene therapy, non-viral vector provides new possibilities for IDD treated with miRNA.
Objective To explore the expression levels and clinical significance of serum long noncoding RNA myocardial infarction associated transcript (lncRNA MIAT) and microRNA-515-5p (miR-515-5p) in elderly patients with chronic obstructive pulmonary disease (COPD) at different periods. Methods From April 2021 to June 2023, 90 elderly patients with acute exacerbation of COPD treated in Huaibei People’s Hospital were selected as a COPD acute exacerbation group, 88 elderly patients with stable COPD as a COPD stable group, and 90 healthy elderly individuals undergoing physical examination as a control group. The white blood cell count (WBC) and serum lncRNA MIAT and miR-515-5p expression levels were detected in all subjects, blood gas analysis and pulmonary function indexes [oxygenation index (PaO2/FiO2), arterial blood carbon dioxide partial pressure (PaCO2), ratio of forced expiratory volume in the first second to forced vital capacity (FEV1/FVC), and FEV1 as a percentage of predicted value (FEV1%pred)] were detected in the patients with COPD. The correlation between serum lncRNA MIAT, miR-515-5p and smoking, WBC, blood gas analysis and pulmonary function indexes were analyzed in the elderly patients with acute exacerbation of COPD. The influencing factors of acute exacerbation of COPD, and the value of serum lncRNA MIAT, miR-515-5p in predicting the occurrence of acute exacerbation of COPD were also analyzed. Results The smoking proportion, WBC, serum lncRNA MIAT expression levels of the control group, the COPD stable group and the COPD acute exacerbation group were increased in turn, serum miR-515-5p expression levels were decreased in turn (P<0.05). Compared with the COPD stable group, PaCO2 was significantly increased in the COPD acute exacerbation group, while PaO2/FiO2, FEV1/FVC and FEV1%pred were significantly decreased (P<0.05); serum lncRNA MIAT in the elderly patients with acute exacerbation of COPD was positively correlated with smoking, WBC, PaCO2 (P<0.05), and negatively correlated with PaO2/FiO2, FEV1/FVC, FEV1%pred, miR-515-5p (P<0.05); serum miR-515-5p was negatively correlated with smoking, WBC, PaCO2 (P<0.05), and positively correlated with PaO2/FiO2, FEV1/FVC, FEV1%pred (P<0.05). Smoking, WBC, PaCO2, and lncRNA MIAT were risk factors affecting the acute exacerbation of COPD patients, PaO2/FiO2, FEV1/FVC, FEV1%pred, miR-515-5p were protective factors affecting the acute exacerbation of elderly COPD patients (P<0.05). The area under the ROC curve (AUC) of serum lncRNA MIAT, miR-515-5p and their combination in predicting acute exacerbation in elderly COPD patients were 0.823, 0.862 and 0.919, respectively, higher than the AUC predicted by serum lncRNA MIAT and miR-515-5p separately (P<0.05). Conclusions Serum lncRNA MIAT expression was high in elderly patients with COPD, and serum miR-515-5p expression was low, and the changes of both were more obvious in patients with acute exacerbation. Both were correlated with blood gas analysis and pulmonary function indexes in patients with acute exacerbation, and have high value in predicting the occurrence of acute exacerbation in elderly patients with COPD.
Objective To summary the functional roles and molecular mechanisms of microRNA (miRNA) in osteoblast differentiation so as to supply information for basic and cl inical researches. Methods Recent l iterature concerning miRNA in osteoblast differentiation was reviewed. The information was classified and summarized. Results miRNAs critically regulate bone morphogenetic protein, transforming growth factor β, and Wnt/β-catenin signal ing pathways during osteoblast differentiation. In pathological conditions, especially in some disorders of abnormal osteoblast differentiation, downregulated miRNA expression has been observed. Conclusion miRNA may represent a novel biomarker for diagnosis, and a candidate target therapies for the disorders with abnormal osteoblast differentiation.
Objective To explore the effect of long non-coding RNA H19 (lncRNA H19) on chronic heart failure (CHF) rats and its possible mechanism. Methods CHF (SD male rats, with a weight of 300±10 g, 10 weeks old) rat model was established by abdominal aortic coarctation. The 84 rats successfully modeled were randomly divided into a model group, a si-NC group [transfected lncRNA H19 small interfering RNA (siRNA) negative control], a si-H19 group (transfected lncRNA H19 siRNA), a si-miR-NC group [transfected microRNA-214 (miR-214) siRNA negative control], a si-miR-214 group (transfected miR-214 siRNA), a si-H19+si-miR-NC group (co-transfected lncRNA H19 siRNA and miR-214 siRNA negative control), and a si-H19+si-miR-214 group (co-transfected lncRNA H19 siRNA and miR-214 siRNA), 12 rats in each group. Another 12 rats were set up in a sham operation group (rats were only threaded without ligation, and the other operations were the same as the model group). After 4 weeks of intervention, the cardiac function, serum myocardial injury markers, heart failure markers, inflammatory related factors, apoptosis related factors and myocardial histopathological changes were compared. The expressions of lncRNA H19 and miR-214 in myocardial tissue were detected by real-time fluorescence quantitative PCR, and the targeting relationship between lncRNA H19 and miR-214 was detected by double luciferase reporter gene. Results Compared with those in the sham operation group, the myocardium of rats in the model group was severely damaged and a large number of inflammatory cells infiltrated; the lncRNA H19, cardiac function indexes (left ventricular end systolic diameter, left ventricular end diastolic diameter), serum myocardial injury markers (creatine kinase MB, cardiac troponin I), heart failure markers (brain natriuretic peptide, N-terminal pro brain natriuretic peptide), inflammatory related factors (interleukin-1β, interleukin-18, tumor necrosis factor-α, interleukin-6), cardiomyocyte apoptosis rate, apoptosis related proteins [B lymphocytoma-2 (Bcl-2), Bcl-2 related X protein (Bax), cysteinyl aspartate specific proteinase-1 (Caspase-1)] in the myocardial tissue of the model group were significantly increased (P<0.05); miR-214 of myocardial tissue, cardiac function indexes (left ventricular ejection fraction, left ventricular fractional shortening) and Bcl-2/Bax ratio were significantly decreased (P<0.05). Compared with the model group, silencing lncRNA H19 could significantly improve the cardiac function and the changes of the above indexes in CHF rats, and reduce myocardial injury (P<0.05); down-regulation of miR-214 could significantly reverse the protective effect of si-H19 on myocardial injury in CHF rats (P<0.05). Conclusion Silencing lncRNA H19 can up-regulate the expression of miR-214, inhibit the expression of Caspase-1, inhibit the apoptosis and inflammatory reaction of cardiomyocytes, and alleviate myocardial injury in rats with CHF.
Objective To review the progress, controversy and trend in the regulation and mechanism of the microRNAs (miRNAs) during the osteogenesis. Methods Recent l iterature concerning regulation and mechanism of the miRNAs during the osteogenesis was extensively reviewed, summarized and analyzed. Results Recently miRNAs was a hot topic for osteogenesis. More and more materials showed its important role in ossification, but its definite mechanism was notclear. Conclusion Osteogenesis can be strengthened by miRNAs technology, which has a bright future and may also provide the molecular mechanism. The study on miRNAs of osteogenesis can provide a model to analyze and compare the osteogenetic effects of novel drugs.
Objective To summarize the stemness regulation mechanism of microRNA on invasion, metastasis and chemoresistance of gastric cancer stem cells (GCSCs), and to explore the anti-tumor therapy based on miRNA targeting GCSCs. Method The literatures about the research progress of miRNA and GCSCs at home and abroad in recent years were collected and reviewed. Results MiRNA could regulate a series of important cellular processes such as proliferation, apoptosis, differentiation and epithelial-mesenchymal transition of GCSCs by participating in the expression of related target genes, which was associated with poor prognosis and high mortality of gastric cancer patients. Silencing or restoring the expression of candidate miRNA of GCSCs could provide a novel and promising approach for the treatment of gastric cancer. Conclusions GCSCs have an important relationship with the malignant biological behavior of gastric cancer, and studies have confirmed that miRNA play an important regulatory role in GCSCs. Therefore, miRNA can be used as a potential target for the treatment of gastric cancer. By regulating the expression of specific miRNA, it can inhibit tumor invasion and metastasis, and improve the sensitivity of chemotherapy drugs.