A rat model of middle cerebral artery permanent occlusion was established using the modified Longa method. Successfully established model animals were treated by blood-letting puncture at twelve Jing-Well points of th...A rat model of middle cerebral artery permanent occlusion was established using the modified Longa method. Successfully established model animals were treated by blood-letting puncture at twelve Jing-Well points of the hand, and/or by injecting mannitol into the caudal vein twice daily. Brain tissue was collected at 24, 48 and 72 hours after modeling, and blood was collected through the retinal vein before Evans blue was injected, approximately 1 hour prior to harvesting of brain tissue. Results showed that Evans blue leakage into brain tissue and serum nitric oxide synthase activity were significantly increased in model rats. Treatment with blood-letting punctures at twelve Jing-Well points of the hand and/or injection of mannitol into the caudal vein reduced the amount of Evans blue leakage into the brain tissue and serum nitric oxide synthase activity to varying degrees. There was no significant difference between single treatment and combined treatment. Experimental findings indicate that blood-letting punctures at twelve Jing-Well points of the hand can decrease blood-brain barrier permeability and serum nitric oxide synthase activity in rats following middle cerebral artery occlusion, and its effect is similar to that of mannitol injection alone and Jing-Well points plus mannitol injection.展开更多
Vacuum well point is a new but faint soft ground treatment method. This work focuses on the consolidation behavior of a reconstituted soft clayey specimen under vacuum well point combined with surcharge loading. The l...Vacuum well point is a new but faint soft ground treatment method. This work focuses on the consolidation behavior of a reconstituted soft clayey specimen under vacuum well point combined with surcharge loading. The laboratory test was conducted through a vacuum-surcharge consolidation apparatus, and the vacuum loading scheme was adopted for vacuum pressure application to investigate the vacuum effect on soil consolidation. In the testing process, some key parameters such as vacuum pressure, pore water pressure and settlement deformation were timely recorded. Furthermore, the water content, void ratio and permeability coefficient of samples collected after loading were measured to reflect the consolidation characteristics. By comparing with the membrane system and membraneless system, something different was found for the vacuum well point method. The results indicate that the consolidation behavior of an axisymmetric single vacuum well point is almost identical to the behavior of vacuum preloading combined with prefabricated vertical drain(PVD), except for the distribution of the vacuum pressure along the well drain due to the structure of the vacuum well point. And the vacuum well point method may be useful for the improvement of soft clayey deposit in a certain depth.展开更多
OBJECTIVE:To observe the effects of electro-acupuncture(EA) at related Jing-well Points(HT 9,PC 9,KI 1 and LU 11) in rats with vascular dementia(VD) and discuss the relative mechanism.METHODS:A randomized controlled a...OBJECTIVE:To observe the effects of electro-acupuncture(EA) at related Jing-well Points(HT 9,PC 9,KI 1 and LU 11) in rats with vascular dementia(VD) and discuss the relative mechanism.METHODS:A randomized controlled animal experiment was designed.A total of 104 rats were involved in the present study and divided randomly into 4 groups:sham-operation group,model group,Jing-well Points group,and medication group.The VD model was established according to the modified 4-vessel occlusion(4-VO) method.VD rats in the Jing-well Points group were treated by EA at the related Jing-well Points(HT 9,PC 9,KI 1 and LU 11) while those in the medication group were treated with nimotop.The step-down avoidance test was performed before and after treatment in all rats.Latency and error frequency indexed memory function were recorded.Nitric oxide(NO) levels and superoxide dismutase(SOD) activity in both cerebral tissue and serum were detected after the treatment course.RESULTS:A total of 42 rats were included in the final analysis.Compared with the model group,the latency in the Jing-well Points group was significantly prolonged(P<0.01) and the error frequency was significantly decreased(P<0.05) after therapy;the decrease in NO levels in both brain tissue and serum was significant(P<0.05 and P<0.01,respectively);and the increase in SOD activity was also significant(P<0.01).There was no significant difference in latency,error frequency,NO levels and SOD activity between the Jing-well Points group and medication group.CONCLUSION:EA at related Jing-well Points can remarkably improve memory impairment in VD rats.Moreover,decreasing the overproduction of NO and strengthening the ability of eliminating free radicals may provide therapeutic potential for the treatment of VD.展开更多
OBJECTIVE:To observe the effects of bloodletting puncture at Jing-Well points in the distal ends of the finger and toe on survival rate,survival time,and brain edema in rats with cerebral ischemia.METHODS:Fifty-four m...OBJECTIVE:To observe the effects of bloodletting puncture at Jing-Well points in the distal ends of the finger and toe on survival rate,survival time,and brain edema in rats with cerebral ischemia.METHODS:Fifty-four male Sprague-Dawley rats were randomly divided into five groups:normal,sham operation,model,bloodletting puncture at Jing-Well points in distal ends of finger and toe,and puncture without bloodletting at these points.Middle cerebral artery occlusion models were established according to Longa's method.The brains were taken 48 h after the model was established.Brain water content,brain density,brain coefficient,survival rate,and survival time in each group were measured.RESULTS:After bloodletting puncture,the survival time of the rats was prolonged,their brain water content and brain coefficient were reduced,and brain density was increased.CONCLUSION:Bloodletting puncture at Jing-Well points in the distal ends of the finger and toe can improve function in ischemic brain edema.展开更多
基金sponsored by the Open Research Fund of Zhejiang First-foremost Key Subject-Acupuncture & Moxibustion,No. ZTK2010A07
文摘A rat model of middle cerebral artery permanent occlusion was established using the modified Longa method. Successfully established model animals were treated by blood-letting puncture at twelve Jing-Well points of the hand, and/or by injecting mannitol into the caudal vein twice daily. Brain tissue was collected at 24, 48 and 72 hours after modeling, and blood was collected through the retinal vein before Evans blue was injected, approximately 1 hour prior to harvesting of brain tissue. Results showed that Evans blue leakage into brain tissue and serum nitric oxide synthase activity were significantly increased in model rats. Treatment with blood-letting punctures at twelve Jing-Well points of the hand and/or injection of mannitol into the caudal vein reduced the amount of Evans blue leakage into the brain tissue and serum nitric oxide synthase activity to varying degrees. There was no significant difference between single treatment and combined treatment. Experimental findings indicate that blood-letting punctures at twelve Jing-Well points of the hand can decrease blood-brain barrier permeability and serum nitric oxide synthase activity in rats following middle cerebral artery occlusion, and its effect is similar to that of mannitol injection alone and Jing-Well points plus mannitol injection.
基金Projects(41202220,41472278)supported by the National Natural Science Foundation of ChinaProject(20120022120003)supported by the Research Fund for the Doctoral Program of Higher Education,ChinaProject(2652012065)supported by the Fundamental Research Funds for Central Universities,China
文摘Vacuum well point is a new but faint soft ground treatment method. This work focuses on the consolidation behavior of a reconstituted soft clayey specimen under vacuum well point combined with surcharge loading. The laboratory test was conducted through a vacuum-surcharge consolidation apparatus, and the vacuum loading scheme was adopted for vacuum pressure application to investigate the vacuum effect on soil consolidation. In the testing process, some key parameters such as vacuum pressure, pore water pressure and settlement deformation were timely recorded. Furthermore, the water content, void ratio and permeability coefficient of samples collected after loading were measured to reflect the consolidation characteristics. By comparing with the membrane system and membraneless system, something different was found for the vacuum well point method. The results indicate that the consolidation behavior of an axisymmetric single vacuum well point is almost identical to the behavior of vacuum preloading combined with prefabricated vertical drain(PVD), except for the distribution of the vacuum pressure along the well drain due to the structure of the vacuum well point. And the vacuum well point method may be useful for the improvement of soft clayey deposit in a certain depth.
文摘OBJECTIVE:To observe the effects of electro-acupuncture(EA) at related Jing-well Points(HT 9,PC 9,KI 1 and LU 11) in rats with vascular dementia(VD) and discuss the relative mechanism.METHODS:A randomized controlled animal experiment was designed.A total of 104 rats were involved in the present study and divided randomly into 4 groups:sham-operation group,model group,Jing-well Points group,and medication group.The VD model was established according to the modified 4-vessel occlusion(4-VO) method.VD rats in the Jing-well Points group were treated by EA at the related Jing-well Points(HT 9,PC 9,KI 1 and LU 11) while those in the medication group were treated with nimotop.The step-down avoidance test was performed before and after treatment in all rats.Latency and error frequency indexed memory function were recorded.Nitric oxide(NO) levels and superoxide dismutase(SOD) activity in both cerebral tissue and serum were detected after the treatment course.RESULTS:A total of 42 rats were included in the final analysis.Compared with the model group,the latency in the Jing-well Points group was significantly prolonged(P<0.01) and the error frequency was significantly decreased(P<0.05) after therapy;the decrease in NO levels in both brain tissue and serum was significant(P<0.05 and P<0.01,respectively);and the increase in SOD activity was also significant(P<0.01).There was no significant difference in latency,error frequency,NO levels and SOD activity between the Jing-well Points group and medication group.CONCLUSION:EA at related Jing-well Points can remarkably improve memory impairment in VD rats.Moreover,decreasing the overproduction of NO and strengthening the ability of eliminating free radicals may provide therapeutic potential for the treatment of VD.
基金Supported by High Technology Fund of Japanese Ministry of Education,Culture,Sports,Science and Technology:Clinical and Experimental Research on the Influence of Acupuncture and Chinese Medicine Herb on Recovery of Nerve Ending Damage(No.343) Open Fund Key Projects of Zhejiang Provincial Top Key Discipline of Acupuncture and Massage(No.ZTK2010A07)
文摘OBJECTIVE:To observe the effects of bloodletting puncture at Jing-Well points in the distal ends of the finger and toe on survival rate,survival time,and brain edema in rats with cerebral ischemia.METHODS:Fifty-four male Sprague-Dawley rats were randomly divided into five groups:normal,sham operation,model,bloodletting puncture at Jing-Well points in distal ends of finger and toe,and puncture without bloodletting at these points.Middle cerebral artery occlusion models were established according to Longa's method.The brains were taken 48 h after the model was established.Brain water content,brain density,brain coefficient,survival rate,and survival time in each group were measured.RESULTS:After bloodletting puncture,the survival time of the rats was prolonged,their brain water content and brain coefficient were reduced,and brain density was increased.CONCLUSION:Bloodletting puncture at Jing-Well points in the distal ends of the finger and toe can improve function in ischemic brain edema.