Objective To study the relationship between apoptosis and hypertrophy of the left ventricie (LV) before and after its regression with antihypertensive treatment. Methods Forty 12- week old spontaneously. hypertensive ...Objective To study the relationship between apoptosis and hypertrophy of the left ventricie (LV) before and after its regression with antihypertensive treatment. Methods Forty 12- week old spontaneously. hypertensive rats(SHR were randomly divided into 2 groups, one given enalapril (SHR - d grouP) and the other without treatment (SHR group). Twenty normotensive Wistar Kyoto rats of the same age served as controls (WKY group). The changes of body weight and blood pressure were observed for 3 months. The rats were killed at the 24th week of age. The weight of LV, the body weight (B W), and the ratio of LV/BW were compared between the groups. Then by in situ specific labelling of nuclear DNA fragmentation, the apoptosis in the wall of the left ventricle was compared between them. RcsuIts The index of apoptosis was SHR - d>SHR> WKY The dofference was significant. ConcIusion The hypertrophy of the LV and its regression is very’likely related with the imbalance between the proloferation and death of cells of the muscle in the LV.展开更多
BACKGROUND： Activated clotting factor VII has been demonstrated to exhibit obvious anti-apoptosis effects. OBJECTIVE： To observe the effect of activated clotting factor VII on neuronal apoptosis at different time po...BACKGROUND： Activated clotting factor VII has been demonstrated to exhibit obvious anti-apoptosis effects. OBJECTIVE： To observe the effect of activated clotting factor VII on neuronal apoptosis at different time points following rat intracerebral hemorrhage （ICH）. DESIGN, TIME AND SETTING： A randomized, controlled, animal experiment was performed at the Neurobiological Laboratory of Second Military Medical University from October 2005 to April 2006. MATERIALS： Recombinant-activated clotting factor Vlla （rFVtla） was purchased from Danish Novo Nordisk, Denmark. In situ cell death detection kit-POD kit was purchased from Roche, Switzerland. Caspase-3 activity determination kit from Biovision, USA. METHODS： A total of 72 healthy, male, Sprague Dawley rats, aged 5-8 months, were randomly assigned to three groups （n = 24）： sham-operated, ICH model, and rFVIla. In the ICH model and rFVIla groups, 80.0μL autologous non-clotting blood from rat tails was injected into the right caudate putamen to establish the ICH. The empty microinjector was inserted into the caudate putamen in the sham-operated group. The ICH model and rFVIla groups were subdivided into four subsets separately： 6, 24, 72 hours and 7 days following ICH. The rats in the rFVIla group were injected with 160 μg/kg rFVIla via the dorsal vein of the penis. MAIN OUTCOME MEASURES： Apoptotic cells were detected in the right caudate putamen by TUNEL; caspase-3 activity by spectrophotometry; and rat neurological function was evaluated by neurological functional impairment scales. RESULTS： Rat neurological function was deteriorated at 24, 72 hours, and 7 days following ICH. The TUNEL-positive cells and caspase-3 activity in the right caudate putamen was significantly increased in the ICH rats （P 〈 0.05）; rFVlla treatment reduced the number of TUNEL-positive cells and caspase-3 activity in the right caudate putamen （P 〈 0.05）, and neurological function was significantly improved （P 〈 0.05）. CONCLUSION： rFVIla was applied within 72 hours after tCH, which reduced the amount of neuronal apoptosis and promoted neurological function restoration by possibly inhibiting caspase-3 activity.展开更多
文摘Objective To study the relationship between apoptosis and hypertrophy of the left ventricie (LV) before and after its regression with antihypertensive treatment. Methods Forty 12- week old spontaneously. hypertensive rats(SHR were randomly divided into 2 groups, one given enalapril (SHR - d grouP) and the other without treatment (SHR group). Twenty normotensive Wistar Kyoto rats of the same age served as controls (WKY group). The changes of body weight and blood pressure were observed for 3 months. The rats were killed at the 24th week of age. The weight of LV, the body weight (B W), and the ratio of LV/BW were compared between the groups. Then by in situ specific labelling of nuclear DNA fragmentation, the apoptosis in the wall of the left ventricle was compared between them. RcsuIts The index of apoptosis was SHR - d>SHR> WKY The dofference was significant. ConcIusion The hypertrophy of the LV and its regression is very’likely related with the imbalance between the proloferation and death of cells of the muscle in the LV.
文摘BACKGROUND： Activated clotting factor VII has been demonstrated to exhibit obvious anti-apoptosis effects. OBJECTIVE： To observe the effect of activated clotting factor VII on neuronal apoptosis at different time points following rat intracerebral hemorrhage （ICH）. DESIGN, TIME AND SETTING： A randomized, controlled, animal experiment was performed at the Neurobiological Laboratory of Second Military Medical University from October 2005 to April 2006. MATERIALS： Recombinant-activated clotting factor Vlla （rFVtla） was purchased from Danish Novo Nordisk, Denmark. In situ cell death detection kit-POD kit was purchased from Roche, Switzerland. Caspase-3 activity determination kit from Biovision, USA. METHODS： A total of 72 healthy, male, Sprague Dawley rats, aged 5-8 months, were randomly assigned to three groups （n = 24）： sham-operated, ICH model, and rFVIla. In the ICH model and rFVIla groups, 80.0μL autologous non-clotting blood from rat tails was injected into the right caudate putamen to establish the ICH. The empty microinjector was inserted into the caudate putamen in the sham-operated group. The ICH model and rFVIla groups were subdivided into four subsets separately： 6, 24, 72 hours and 7 days following ICH. The rats in the rFVIla group were injected with 160 μg/kg rFVIla via the dorsal vein of the penis. MAIN OUTCOME MEASURES： Apoptotic cells were detected in the right caudate putamen by TUNEL; caspase-3 activity by spectrophotometry; and rat neurological function was evaluated by neurological functional impairment scales. RESULTS： Rat neurological function was deteriorated at 24, 72 hours, and 7 days following ICH. The TUNEL-positive cells and caspase-3 activity in the right caudate putamen was significantly increased in the ICH rats （P 〈 0.05）; rFVlla treatment reduced the number of TUNEL-positive cells and caspase-3 activity in the right caudate putamen （P 〈 0.05）, and neurological function was significantly improved （P 〈 0.05）. CONCLUSION： rFVIla was applied within 72 hours after tCH, which reduced the amount of neuronal apoptosis and promoted neurological function restoration by possibly inhibiting caspase-3 activity.
