Matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMP) play a significant role in regulating angiogenesis, the process of new blood vessel formation. Interstitial collagenase (MMP-1), 72 k...Matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMP) play a significant role in regulating angiogenesis, the process of new blood vessel formation. Interstitial collagenase (MMP-1), 72 kDa gelatinase A/type IV collagenase (MMP-2), and 92 kDa gelatinase B/type IV collagenase (MMP-9) dissolve extracellular matrix (ECM) and may initiate and Promote angiogenesis. TIMP-1, TIMP-2, TIMP-3, and possibly,TIMP-4 inhibit neovascularisation. A new paradigm is emerging that matrilysin (MMP-7), MMP-9, and metalloelastase (MMP-12) may block angiogehesis by converting plasndnogen to angiostatin, which is one of the most potent angiogenesis antagonists. MMPs and TIMPs play a complex role in regulating angiogenesis. An understanding of the biochemical and cellular pathways and mechanisms of angiogenesis will provide importal information to allow the control of angiogenesis, e.g. the stimulation of angiogenesis for coronary collateral circulation formation; while the inhibition for treating arthritis and cancer.展开更多
Objective: To discuss the expression and significance of angiostatin, vascular endothelial growth factor and matrix metalloproteinase-9 in the brain tissue of diabetic rats with ischemia reperfusion. Methods: A total ...Objective: To discuss the expression and significance of angiostatin, vascular endothelial growth factor and matrix metalloproteinase-9 in the brain tissue of diabetic rats with ischemia reperfusion. Methods: A total of 60 male Wistar rats were randomly divided into the normal group, sham group, diabetic cerebral infarction group and single cerebral infarction group according to the random number table, with 15 rats in each group. The high sucrose diet and intraperitoneal injection of streptozotocin were performed for the modeling of diabetic rats, while the thread-occlusion method was employed to build the model of cerebral ischemia reperfusion. The immunohistochemical staining was performed to detect the expression of angiostatin, vascular endothelial growth factor(VEGF) and matrix metalloproteinase-9(MMP-9) in the brain tissue. Results: The expression of angiostatin after the reperfusion in the brain tissue of rats in the single cerebral infarction group and diabetic cerebral infarction group was increased 6 h after the reperfusion, reached to the peak on 1 d and then decreased gradually. The expression of angiostatin in the diabetic cerebral infarction group 6 h, 1 d, 3 d and 7 d after the reperfusion was significantly higher than that in the single cerebral infarction group(P<0.05). VEGF began to be increased 1 h after the reperfusion in the single cerebral infarction group and diabetic cerebral infarction group, reached to the peak at 6 h and then decreased gradually. The expression of VEGF in the diabetic cerebral infarction group at each time point after the reperfusion was significantly lower than that in the single cerebral infarction group(P<0.05). MMP-9 began to be be increased 1 h after the reperfusion in the single cerebral infarction group and diabetic cerebral infarction group, reached to the peak on 1 d and then decreased gradually. The expression of MMP-9 in the diabetic cerebral infarction group at each time point after the reperfusion was significantly higher than that in the single cerebral i展开更多
Objective:To explore the anti-tumor activity of tanshinone ⅡA in combined with cyclophosphamide against Lewis mice with lung cancer and the effect on cellular immune function.Methods:Lewis tumor cells were inoculated...Objective:To explore the anti-tumor activity of tanshinone ⅡA in combined with cyclophosphamide against Lewis mice with lung cancer and the effect on cellular immune function.Methods:Lewis tumor cells were inoculated suhcutaneously into the right armpit of mice in each group(n=20) to establish Lewis lung cancer mice model.After model establishment,mice in the model group were given normal saline by lavage,qd.Mice in treatment Ⅰ group were given intraperitoneal injection of TanIIA,15 mg/kg,qd.Mice in treatment Ⅱ group were given intraperitoneal injection of CTX,25 mg/kg,qd.Mice in treatment Ⅲ group were given intraperitoneal injections of TanIIA and CTX,in which the administration method of TanIIA was the same as in treatment Ⅰ group,continuously for 2 weeks,and the dosage of CTX was the same as in treatment Ⅱ group,24 h after model establishment,every other day.Mice were sacrificed 2 weeks after establishment.The tumor tissues were collected to calculate the anti-tumor rate.Immunohistochemistry was used to detect the expressions of Bcl-2,Bax,VEGF,Angiostatin,and Endostatin.FCM was used to detect T lymphocyte subsets in spleen and liver of mice.Results:The tumor weight in treatment Ⅰ,Ⅱ,and Ⅲ groups was significantly lower than that in the model group(P<0.05).The tumor weight in treatment Ⅲ group was significantly lower than that in treatment Ⅰ and Ⅱ groups(P<0.05).The anti-tumor rate in treatment Ⅱ and Ⅲ groups was significantly higher than that in treatment Ⅰ group(P<0.05).Bcl-2 expression in the tumor tissues of treatment Ⅰ,Ⅱ,and Ⅲgroups was significantly lower than that in the model group(P<0.05),while Bax expression was significantly higher than that in the model group(P<0.05).Bcl-2 expression in the tumor tissues of treatment Ⅰ and Ⅱ groups was significantly higher than that in treatment Ⅲ group(P<0.05),while Bax expression was significantly lower than that in treatment Ⅲ group(P<0.05).CD4^+ and CD4^+/CD8^+ in treatment Ⅰ,Ⅱ,and Ⅲ groups were significantly high展开更多
文摘Matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMP) play a significant role in regulating angiogenesis, the process of new blood vessel formation. Interstitial collagenase (MMP-1), 72 kDa gelatinase A/type IV collagenase (MMP-2), and 92 kDa gelatinase B/type IV collagenase (MMP-9) dissolve extracellular matrix (ECM) and may initiate and Promote angiogenesis. TIMP-1, TIMP-2, TIMP-3, and possibly,TIMP-4 inhibit neovascularisation. A new paradigm is emerging that matrilysin (MMP-7), MMP-9, and metalloelastase (MMP-12) may block angiogehesis by converting plasndnogen to angiostatin, which is one of the most potent angiogenesis antagonists. MMPs and TIMPs play a complex role in regulating angiogenesis. An understanding of the biochemical and cellular pathways and mechanisms of angiogenesis will provide importal information to allow the control of angiogenesis, e.g. the stimulation of angiogenesis for coronary collateral circulation formation; while the inhibition for treating arthritis and cancer.
基金supported by Shandong Science and Technology Development Plan Project(No.Y2006C02)
文摘Objective: To discuss the expression and significance of angiostatin, vascular endothelial growth factor and matrix metalloproteinase-9 in the brain tissue of diabetic rats with ischemia reperfusion. Methods: A total of 60 male Wistar rats were randomly divided into the normal group, sham group, diabetic cerebral infarction group and single cerebral infarction group according to the random number table, with 15 rats in each group. The high sucrose diet and intraperitoneal injection of streptozotocin were performed for the modeling of diabetic rats, while the thread-occlusion method was employed to build the model of cerebral ischemia reperfusion. The immunohistochemical staining was performed to detect the expression of angiostatin, vascular endothelial growth factor(VEGF) and matrix metalloproteinase-9(MMP-9) in the brain tissue. Results: The expression of angiostatin after the reperfusion in the brain tissue of rats in the single cerebral infarction group and diabetic cerebral infarction group was increased 6 h after the reperfusion, reached to the peak on 1 d and then decreased gradually. The expression of angiostatin in the diabetic cerebral infarction group 6 h, 1 d, 3 d and 7 d after the reperfusion was significantly higher than that in the single cerebral infarction group(P<0.05). VEGF began to be increased 1 h after the reperfusion in the single cerebral infarction group and diabetic cerebral infarction group, reached to the peak at 6 h and then decreased gradually. The expression of VEGF in the diabetic cerebral infarction group at each time point after the reperfusion was significantly lower than that in the single cerebral infarction group(P<0.05). MMP-9 began to be be increased 1 h after the reperfusion in the single cerebral infarction group and diabetic cerebral infarction group, reached to the peak on 1 d and then decreased gradually. The expression of MMP-9 in the diabetic cerebral infarction group at each time point after the reperfusion was significantly higher than that in the single cerebral i
基金supported by the Scientific and Research Planning Project of Education Department in Hubei Province with the grant number of Q20131106
文摘Objective:To explore the anti-tumor activity of tanshinone ⅡA in combined with cyclophosphamide against Lewis mice with lung cancer and the effect on cellular immune function.Methods:Lewis tumor cells were inoculated suhcutaneously into the right armpit of mice in each group(n=20) to establish Lewis lung cancer mice model.After model establishment,mice in the model group were given normal saline by lavage,qd.Mice in treatment Ⅰ group were given intraperitoneal injection of TanIIA,15 mg/kg,qd.Mice in treatment Ⅱ group were given intraperitoneal injection of CTX,25 mg/kg,qd.Mice in treatment Ⅲ group were given intraperitoneal injections of TanIIA and CTX,in which the administration method of TanIIA was the same as in treatment Ⅰ group,continuously for 2 weeks,and the dosage of CTX was the same as in treatment Ⅱ group,24 h after model establishment,every other day.Mice were sacrificed 2 weeks after establishment.The tumor tissues were collected to calculate the anti-tumor rate.Immunohistochemistry was used to detect the expressions of Bcl-2,Bax,VEGF,Angiostatin,and Endostatin.FCM was used to detect T lymphocyte subsets in spleen and liver of mice.Results:The tumor weight in treatment Ⅰ,Ⅱ,and Ⅲ groups was significantly lower than that in the model group(P<0.05).The tumor weight in treatment Ⅲ group was significantly lower than that in treatment Ⅰ and Ⅱ groups(P<0.05).The anti-tumor rate in treatment Ⅱ and Ⅲ groups was significantly higher than that in treatment Ⅰ group(P<0.05).Bcl-2 expression in the tumor tissues of treatment Ⅰ,Ⅱ,and Ⅲgroups was significantly lower than that in the model group(P<0.05),while Bax expression was significantly higher than that in the model group(P<0.05).Bcl-2 expression in the tumor tissues of treatment Ⅰ and Ⅱ groups was significantly higher than that in treatment Ⅲ group(P<0.05),while Bax expression was significantly lower than that in treatment Ⅲ group(P<0.05).CD4^+ and CD4^+/CD8^+ in treatment Ⅰ,Ⅱ,and Ⅲ groups were significantly high
