RESUMO
Long non-coding RNA HNF1A-antisense 1 (lncRNA HNF1A-AS1) plays important roles in the progression of human tumors. The aim of this study is to unravel the underlying mechanism of HNF1A-AS1 in non-small cell lung cancer (NSCLC). In the present study, we found that HNF1A-AS1 was upregulation in NSCLC tissues and cell lines. High HNF1A-AS1 expression was associated with patients' advanced TNM stage and lymph node metastasis. Reduced HNF1A-AS1 expression inhibited lung cancer cells proliferation, invasion and increased cells apoptosis rate. Bioinformatics analysis and luciferase reporter assay revealed that HNF1A-AS1 interacted with miR-17-5p by directly targeting it. Rescue experiments showed that miR-17-5p suppression reversed the tumor-suppressing role of HNF1A-AS1 knockdown on NSCLC progression. Conclusion, our data indicated that lncRNA HNF1A-AS1 promoted lung cancer cells proliferation and invasion via regulating miR-17-5p, suggesting that HNF1A-AS1 could act as a potent therapeutic strategy for the treatment of NSCLC patients.
Assuntos
Carcinoma Pulmonar de Células não Pequenas/genética , Carcinoma Pulmonar de Células não Pequenas/patologia , Proliferação de Células/genética , Neoplasias Pulmonares/genética , Metástase Linfática/genética , MicroRNAs/genética , RNA Longo não Codificante/genética , Células A549 , Linhagem Celular Tumoral , Movimento Celular/genética , Regulação Neoplásica da Expressão Gênica/genética , Humanos , Neoplasias Pulmonares/patologia , Metástase Linfática/patologia , Regulação para Cima/genéticaRESUMO
INTRODUCTION: Effects of ischemic postconditioning (IPostC) and adenosine triphosphate (ATP)-mediated pharmacologic postconditioning (ATP-PPostC) on cardiac function were evaluated by speckle tracking imaging (STI)-based echocardiography. AIMS: A myocardial I/R model was induced in rabbits by reversible ligation of the left ventricular branch of coronary artery. Rabbits were randomized into three groups: ischemia and reperfusion (IR) (no further intervention), IPostC, and ATP-PPostC groups. Cardiac function was evaluated by conventional and STI-based echocardiography. Myocardial necrosis, apoptosis, and myocardial mRNAs of apoptosis-related proteins (Bcl-2 and Bax) were evaluated. RESULTS: Speckle tracking imaging (STI)-based echocardiography revealed that IPostC and ATP-PPostC were associated with better preserved global and regional cardiac function, as indicated by significantly increased GLSrsys, GLSrd, GLSsys, SrLsys, SrLd, and SLsys in both groups (all P<.5). Subsequent pathologic studies indicate that the percentage of necrotic myocardium and permillage of apoptotic cells were significantly lower in the IPostC and ATP-PPostC groups than in the IR group (all P<.05). Moreover, both IPostC and ATP-PPostC were associated with increased Bcl-2 mRNA levels and reduced Bax mRNA levels. CONCLUSIONS: IPostC and ATP-PPostC may exert cardioprotective functions by better preservation of cardiac function during the I/R process and at least partly via attenuation of myocardial apoptosis.
