BackgroundThe tumor suppressor role of lncRNA PTCSC3 has been reported in papillary thyroid carcinoma, our study aimed to investigate its involvement in gastric cancer.MethodsTumor tissues and adjacent healthy tissues were collected from gastric cancer patients. Expression of PTCSC3 and lncRNA Linc-pint in these tissues was analyzed by RT-qPCR. The interaction between PTCSC3 and Linc-pint was analyzed by overexpression experiments. Cell proliferation and stemness were analyzed by CCK-8 assay and cell stemness assay, respectively.ResultsPTCSC3 and lncRNA Linc-pint were both downregulated in tumor tissues than in adjacent healthy tissues of gastric cancer patients. Low levels of PTCSC3 and Linc-pint were closely correlated with poor survival. PTCSC3 and Linc-pint overexpression inhibited tumor growth and cancer cell stemness, while Linc-pint knockdown played an opposite role an attenuated the effects of PTCSC3 overexpression. Expression levels of PTCSC3 and Linc-pint were significantly correlated in tumor tissues but not in adjacent healthy tissues. Overexpression of PTCSC3 and Linc-pint upregulated the expression of each other.ConclusionPTCSC3 inhibits tumor growth and cancer cell stemness in gastric cancer by interacting with lncRNA Linc-pint.

long intergenic non-protein coding rna, p53 induced transcript (linc-pint) has been reported to be downregulated in various cancer cell lines; however, its expression profile and role in gastric cancer remains unknown. The present study aimed to investigate the involvement of linc-pint in gastric cancer. Through quantitative polymerase chain reaction, western blotting and viability assays, it was observed that Linc-pint expression was significantly downregulated in gastric biopsies from patients with gastric cancer, compared with healthy controls. conversely, the expression of hypoxia-inducible factor-1α (HiF-1α) mRNA was significantly upregulated in patients with gastric cancer compared with in healthy controls. using a variety of statistical inference tests, including receiver operating characteristic curve and correlation analyses, it was determined that the expression levels of linc-pint and HiF-1α exhibited a significantly negative correlation in patients with gastric cancer but not in healthy controls. Linc-pint expression was significantly and inversely associated with tumor size but not tumor metastasis. linc-pint overexpression inhibited the proliferation of gastric cancer cells, whereas treatment with exogenous HiF-1α promoted proliferation. linc-pint overexpression downregulated the expression of HiF-1α, whereas exogenous HiF-1α did not significantly alter Linc-pint expression. Furthermore, treatment with exogenous HiF-1α suppressed the inhibitory effects of linc-pint overexpression on the proliferation of gastric cancer cells. in conclusion, overexpression of linc-pint may inhibit the growth of gastric tumors via downregulation of HiF-1α.

Background Non-small-cell lung carcinoma (NSCLC) is the most common type of lung cancer. Circular RNA_0000429 (circ_0000429) is an identified circular RNA (circRNA) that is correlated with cancer progression. However, the role of circ_0000429 in NSCLC remains unknown. In the present study, we aimed to investigate the function of circ_0000429 in NSCLC and the underlying mechanism. Methods The expression patterns of circ_0000429 were determined using qRT-PCR in NSCLC samples and cell lines. The subcellular distribution of circ_0000429 in NSCLC cells was analyzed by fluorescence in situ hybridization (FISH). Cell proliferation was examined utilizing the CCK-8 assay. Cell migration and invasion were evaluated using the transwell assay. We used the bioinformatics software TargetScan and miRanda to predict circRNA–miRNA and miRNA–mRNA interactions. Results Our results showed that circ_0000429 expressions were significantly upregulated in NSCLC tissues and cell lines. Knockdown of circ_0000429 significantly inhibited the cell proliferation, migration, and invasion of NSCLC cells in vitro. Furthermore, we demonstrated that circ_0000429 acted as a sponge to absorb microRNA-1197 (miR-1197) and promoted MADD expression. Conclusion Collectively, our results demonstrated that circ_0000429 exhibited a carcinogenic role by sponging miR-1197 and regulating CMADD expression in NSCLC. These findings provided evidence for understanding the role of circ_0000429 in NSCLC tumorigenesis.

Objective: The objective of this research is to explore the diagnostic value of imaging plus tumor markers in the early detection of lung cancer.Methods: Sixty patients with lung cancer treated in our hospital from January 2018 to January 2019 were selected as group A. They were matched with 60 patients with benign lung disease as group B and 60 healthy subjects examined in our hospital as group C. The carcino-embryonic antigen (CEA), CYFRA21-1, and neuron-specific enolase (NSE) were assessed, and the diagnostic value of tumor markers plus imaging in lung cancer diagnosis was explored.Results: The CEA, CYFRA21-1, and NSE in group A were evidently superior to those in groups B and C, and those in group B were superior to those in group C (all P < 0.001). CEA had the highest sensitivity (56.7%), and NSE had the highest specificity (93.3%). The tumor markers plus imaging had the highest sensitivity for different types of lung cancer, and the sensitivity to early lung cancer (90%) was superior to other diagnostic methods (P < 0.05).Conclusion: The tumor markers plus imaging is of great significance in early lung cancer diagnosis and provides a reference for judging the pathological classification.

e23187 Background: Most patients with lung cancer have psychological problems, which has a significant impact on patients' rehabilitation, treatment and quality of life. Through the distress and quality of life assessment, to understand the risk factors of distress, in order to improve the quality of life of lung cancer patients. Methods: The investigation was consisted of 209 lung cancer patients who were treated in Fourth Hospital of Hebei Medical University from February 2014 to December 2015.Patients were assessed through the use of distress thermometer, problem list, quality of life questionnaire. Lung cancer patients were divided into a significant distress group and a non-significant distress group. Chi-square test was used to analyze the relationship between demographic characteristics, disease information and significant distress. Logistic regression analysis was used to analyze risk factors for distress. The Spearman rank correlation was used to analyze the correlation between the significant distress group and each area of the quality of life questionnaire. The test level was significantly different at P< 0.05. Results: The distress of majority lung cancer patients was 0-4 points, 68 cases were significant distress, significant distress rate was 32.5%. Logistic regression showed PS scores, family residence, informed condition were risk factors of significant distress( P< 0.001 < P= 0.035, P= 0.031). Economic problems were the most common cause of psychological distress in lung cancer patients. Other risk factors included the lack of time and energy to take care for the elderly/children, fear, sadness, dizziness and pain. The significant distress of lung cancer patients was negatively correlated with health status, physical function, emotional function, cognitive function, social function, and was positively correlated with symptoms as fatigue, nausea and vomiting, pain, shortness of breath, insomnia, loss of appetite and constipation. Conclusions: The incidence of significant distress in patients with lung cancer is 32.5%. PS score, fully informed, and family residence are the risks of significant distress in patients. The distress of lung cancer patients is significantly related to the quality of life.