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Aim To investigate the effect of silencing circRNA ciRS-7 on cisplatin resistance of gastric cancer cells and its related mechanism. Methods Cisplatin-resistant gastric cancer cells HGC-27/DDP were constructed, ciRS-7 was silenced and HGC-27/DDP cells were treated with cisplatin. Real-time quantitative PCR (qRT-PCR) was used to detect the expression levels of ciRS-7 and microrNA-944 (miR-944). Cell counting kit-8 (CCK-8) was used to detect cell survival rate. Clone formation assay was used to detect the number of clones. Western blot was used to detect the protein expression levels of CyclinD1, proliferating cell nuclear antigen (PCNA), B-lymphocytoma-2-associated X protein (Bax), B-lymphocytoma-2 (Bcl-2) and cleaved aspartate-specific cysteine proteinase 3 (cleaved-caspase-3). Flow cytometry was used to detect cell apoptosis rate. In situ end labeling (TUNEL) was used to detect apoptosis index. Dual luciferase assay was used to verify the targeting relationship between ciRS-7 and miR-944. Results CiRS-7 was highly expressed in cisplatin-resistant gastric cancer tissues and cells, while miR-944 was low expressed in cisplatin-resistant gastric cancer tissues and cells. The survival rate, clonal formation number, protein expression levels of CyclinD1, PCNA and Bcl-2 in cisplatin-treated HGC-27/DDP cells were significantly reduced by silencing ciRS-7, while ciRS-7 expression level, apoptosis rate, apoptosis index, Bax, cleaved-caspase-3 protein expression levels of cisplatin-treated HGC-27/DDP cells were significantly raised. CiRS-7 targetedly inhibited the expression of miR-944. Conclusions Silencing ciRS-7 can reverse cisplatin resistance of gastric cancer cells, and the mechanism may be related to the promotion of miR-944 expression by silencing ciRS-7.
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<p><b>OBJECTIVE</b>To observe effect of opening point method of ziwu liuzhu on myocardial ischemia in the patient of stroke.</p><p><b>METHODS</b>Thirty cases of stroke with myocardial ischemia were treated with opening acupoint according to time of the combination of reinforcing mother point and reducing son point of the heart channel in nazi method of ziwu liuzhu, and 30 cases in the control group were treated with acupuncture at Guangming (GB 37). Changes of electrocardiogram before and after treatment were recorded.</p><p><b>RESULTS</b>ST-T segment raised significantly 30 min after treatment with ziwu liuzhu needling method as compared with the control group (P < 0.05), the treatment group being better than the control group.</p><p><b>CONCLUSION</b>Excessive and deficient changes of the qi and blood in the meridians and collaterals are correlated with time rhythm, and ziwu liuzhu needling method can increase clinical therapeutic effect.</p>