Electroacupuncture has been shown to improve cerebral blood flow in animal models of stroke. However, it is unclear whether electroacupuncture alters mi RNA expression in the cortex. In this study, we examined changes...Electroacupuncture has been shown to improve cerebral blood flow in animal models of stroke. However, it is unclear whether electroacupuncture alters mi RNA expression in the cortex. In this study, we examined changes in the cerebral cortical mi RNA profile, cerebral blood flow and neurological function induced by electroacupuncture in a rat model of stroke. Electroacupuncture was performed at Renzhong（GV26） and Neiguan（PC6）, with a frequency of 2 Hz, continuous wave, current intensity of 3.0 m A, and stimulation time of 1 minute. Electroacupuncture increased cerebral blood flow and alleviated neurological impairment in the rats. mi RNA microarray profiling revealed that the vascular endothelial growth factor signaling pathway, which links cell proliferation with stroke, was most significantly affected by electroacupuncture. Electroacupuncture induced changes in expression of rno-mi R-206-3p, rno-mi R-3473, rno-mi R-6216 and rno-mi R-494-3p, and these changes were confirmed by quantitative real-time polymerase chain reaction. Our findings suggest that changes in cell proliferation-associated mi RNA expression induced by electroacupuncture might be associated with the improved cerebral blood supply and functional recovery following stroke.展开更多
The expression of micro RNA-19b（mi R-19b） in acute necrotizing pancreatitis（ANP） and its functional role in acinar cell necrosis of SD rats were investigated. Twelve SD rats were divided into two groups randomly, ...The expression of micro RNA-19b（mi R-19b） in acute necrotizing pancreatitis（ANP） and its functional role in acinar cell necrosis of SD rats were investigated. Twelve SD rats were divided into two groups randomly, including control group and ANP group. The rat ANP models were established by intraperitoneal injection of L-arginine（2400 mg/kg body weight）, and equal volume of 0.9% Na Cl was injected in the control group. Mi RNA chip assay was performed to examine the expression of mi RNAs in the pancreas in two different groups. Besides, to further explore the role of mi R-19 b in ANP in vitro, taurolithocholic acid 3-sulfate disodium salt（TLC-S）（200 μmol/L） was administrated to treat the rat pancreatic acinar cell line, AR42 J, for establishing the ANP cells model. The quantitative real-time PCR（q RT-PCR） was adopted to measure the mi R-19 b expression. Moreover, the mimic mi RNA, mi RNA antisense oligonucleotide（AMO） and control vector were used to transfect AR42 J cells, the expression of mi R-19 b was confirmed by q RT-PCR and the necrotizing rate of AR42 J cells was detected with AO/EB method. The expression of mi R-19 b was significantly higher in ANP group than in control group as displayed by the mi RNA chip assay. Furthermore, after inducing necrosis of AR42 J cells in vitro, the expression of mi R-19 b was significantly increased by 2.51±0.14 times in comparison with the control group. As revealed by q RT-PCR assay, the expression of mi R-19 b was 5.94±0.95 times higher in the mimic mi RNA group than in the control vector group, companied with an obviously increased acinar cell necrotizing rate（50.3%±1.5% vs. 39.6%±2.3%, P〈0.05）. Moreover, the expression of mi R-19 b in the mi RNA AMO group was 0.38±0.15 times lower than in the control vector group, and the cell necrosis rate was much lower accordingly（23.1%±3.3% vs. 39.6%±2.3%, P〈0.05）. Besides, there was no significant difference between the control vector cells and the cells without treatment（P〈0.05）. The expression of mi R-19 b was significantly induced in ANP. In addition, up-regulation of mi R-19 b could promote the necrosis of pancreatic acinar cells and mi R-19 b deficiency could decrease the rate of pancreatic acinar cell necrosis.展开更多
基金supported by the National Natural Science Foundation of China,No.81173416
文摘Electroacupuncture has been shown to improve cerebral blood flow in animal models of stroke. However, it is unclear whether electroacupuncture alters mi RNA expression in the cortex. In this study, we examined changes in the cerebral cortical mi RNA profile, cerebral blood flow and neurological function induced by electroacupuncture in a rat model of stroke. Electroacupuncture was performed at Renzhong（GV26） and Neiguan（PC6）, with a frequency of 2 Hz, continuous wave, current intensity of 3.0 m A, and stimulation time of 1 minute. Electroacupuncture increased cerebral blood flow and alleviated neurological impairment in the rats. mi RNA microarray profiling revealed that the vascular endothelial growth factor signaling pathway, which links cell proliferation with stroke, was most significantly affected by electroacupuncture. Electroacupuncture induced changes in expression of rno-mi R-206-3p, rno-mi R-3473, rno-mi R-6216 and rno-mi R-494-3p, and these changes were confirmed by quantitative real-time polymerase chain reaction. Our findings suggest that changes in cell proliferation-associated mi RNA expression induced by electroacupuncture might be associated with the improved cerebral blood supply and functional recovery following stroke.
文摘目的探讨mi RNA-144在骨髓增生异常综合征(MDS)患者外周血中的表达情况及其临床意义。方法收集MDS患者24例,健康对照12例,q RT-PCR检测外周血mi RNA-144相对表达量,统计分析mi RNA-144在MDS中的表达情况及与其预后相关性。结果 mi RNA-144在MDS亚型难治性血细胞减少伴单系病态造血(RCUD)、难治性血细胞减少伴多系病态造血(RCMD)、难治性贫血伴环形铁粒幼细胞(RARS)、难治性贫血伴原始细胞增多-1(RAEB-1)及难治性贫血伴原始细胞增多-2(RAEB-2)中的相对表达量分别为3.81、3.64、4.56、6.49及8.73,均显著高于健康对照组,P<0.01;mi RNA-144在预后好和预后差组中的相对表达量分别为3.81和7.18,差异具有统计学意义,P<0.01。结论 mi RNA-144在MDS中高表达,且可作为潜在的预后评估指标。
文摘The expression of micro RNA-19b（mi R-19b） in acute necrotizing pancreatitis（ANP） and its functional role in acinar cell necrosis of SD rats were investigated. Twelve SD rats were divided into two groups randomly, including control group and ANP group. The rat ANP models were established by intraperitoneal injection of L-arginine（2400 mg/kg body weight）, and equal volume of 0.9% Na Cl was injected in the control group. Mi RNA chip assay was performed to examine the expression of mi RNAs in the pancreas in two different groups. Besides, to further explore the role of mi R-19 b in ANP in vitro, taurolithocholic acid 3-sulfate disodium salt（TLC-S）（200 μmol/L） was administrated to treat the rat pancreatic acinar cell line, AR42 J, for establishing the ANP cells model. The quantitative real-time PCR（q RT-PCR） was adopted to measure the mi R-19 b expression. Moreover, the mimic mi RNA, mi RNA antisense oligonucleotide（AMO） and control vector were used to transfect AR42 J cells, the expression of mi R-19 b was confirmed by q RT-PCR and the necrotizing rate of AR42 J cells was detected with AO/EB method. The expression of mi R-19 b was significantly higher in ANP group than in control group as displayed by the mi RNA chip assay. Furthermore, after inducing necrosis of AR42 J cells in vitro, the expression of mi R-19 b was significantly increased by 2.51±0.14 times in comparison with the control group. As revealed by q RT-PCR assay, the expression of mi R-19 b was 5.94±0.95 times higher in the mimic mi RNA group than in the control vector group, companied with an obviously increased acinar cell necrotizing rate（50.3%±1.5% vs. 39.6%±2.3%, P〈0.05）. Moreover, the expression of mi R-19 b in the mi RNA AMO group was 0.38±0.15 times lower than in the control vector group, and the cell necrosis rate was much lower accordingly（23.1%±3.3% vs. 39.6%±2.3%, P〈0.05）. Besides, there was no significant difference between the control vector cells and the cells without treatment（P〈0.05）. The expression of mi R-19 b was significantly induced in ANP. In addition, up-regulation of mi R-19 b could promote the necrosis of pancreatic acinar cells and mi R-19 b deficiency could decrease the rate of pancreatic acinar cell necrosis.
基金supported by grants from the Sichuan Science and Technology Project(2013ZZ0004)the Shanghai Institutes for Biological Science,Chinese Academy of Sciences&the Sichuan Huiyang Life Science and Technology Corp.Research Program(Y363S21763)+1 种基金National Basic Research Program of China(2011CB510104)a Zhejiang Sci-Tech University Grant(1204807-Y)
