小干扰RNA对川崎病血清诱导血管内皮细胞基质金属蛋白酶-9表达的影响

Objective To investigate the matrix metalloproteinase-9 (MMP-9) expression in vascular endothelial cells stimulated by the serum obtained from children with Kawasaki disease (KD) during the acute phase in the absence and presence of MMP-9 small interfering RNA (siRNA). Methods MMP-9 siRNA plasmids were constructed and transduced into vascular endothelial cells (ECV-304) by liposomal transfection. ECV-304 were cultured in 6 different conditional media: KD serum + siRNA negative control, normal serum, KD serum + MMP-9 siRNA1 (pSilencer3.1-MMP1), KD serum + MMP-9 siRNA2 (pSilencer3.1-MMP2), KD serum + γ-globulin, and KD serum. RT-PCR and Western blot were used to detect MMP-9 expression at mRNA and protein levels in ECV-304. Results The mRNA and protein expression of MMP-9 in ECV-304 cultured with 10% serum from KD patients (2.49±0.03, 1.20±0.04) and KD serum + siRNA negative control plasmid (2.45±0.03, 1.15±0.03)were significantly higher than those cultured with 10% serum from normal control children (1.21±0.03, 0.52±0.03, respectively; all P<0.01) and the increased MMP-9 expression could be significantly inhibited by MMP-9 siRNA1, MMP-9 siRNA2 and γ-globulin (100 mg/ml, all P < 0.01) . Conclusions The increase of MMP-9 expression in vascular endothelial cells induced by the serum from KD patients might take part in the formation of coronary artery lesions. Two customized MMP-9 siRNA plasmids (pSilencer3.1-MMP1 and pSilencer3.1-MMP2) can significantly inhibit both MMP-9 mRNA and protein expression.     

肾素血管紧张素拮抗剂对血管紧张素Ⅱ诱导的基质金属蛋白酶高表达的抑制作用

目的 研究血管紧张素转换酶抑制剂卡托普利和血管紧张素Ⅱ(AngⅡ)受体拮抗剂氯沙坦对AngⅡ诱导的血管平滑肌细胞基质金属蛋白酶-1(MMP-1)和MMP-9 mRNA表达的干预作用.方法 体外原代培养雄性Wistar大鼠胸主动脉血管平滑肌细胞,分为对照组、AngⅡ组、卡托普利组、氯沙坦组和卡托普利与氯沙坦联合应用组.收集各组培养终点细胞,以反转录聚合酶链反应(RT-PCR)检测所收集标本中MMP-1和MMP-9 mRNA的表达,观察不同浓度AngⅡ和作用时间对血管平滑肌细胞MMP-1、MMP-9 mRNA表达的影响及卡托普利、氯沙坦的干预作用.结果 MMP-1 mRNA表达随AngⅡ浓度增加及作用时间延长而增加(P＜0.05),AngⅡ浓度为10-6mol/L时最为显著(P＜0.01).一定浓度的卡托普利(5×10-6mol/L)和氯沙坦(5×10-6mmol/L)可抑制AngⅡ的作用(P＜0.05,P＜0.01);AngⅡ为10-7、10-6、10-5、10-4mol/L时,MMP-9 mRNA表达量分别为0.47±0.03、0.86±0.04、0.94±0.14和1.12±0.19,与对照组0.10±0.04比较,差异有统计学意义(P＜0.05或P＜0.01).卡托普利和氯沙坦可抑制AngⅡ对血管平滑肌细胞分泌的MMP-9 mRNA的促进表达作用,以卡托普利和氯沙坦联合应用时抑制作用最强;MMP-9 mRNA的表达随AngⅡ作用时间延长而增加;MMP-9 mRNA较MMP-1表达早.结论 AngⅡ可以诱导血管平滑肌细胞分泌的MMP-1和MMP-9 mRNA高表达,且存在剂量和时间依赖性.卡托普利、氯沙坦可抑制AngⅡ诱导的血管平滑肌细胞MMP-1和MMP-9 mRNA高表达;卡托普利和氯沙坦联合应用时抑制作用最强;这种抑制作用与作用时间相关.

Abstract：

Objective To investigate the effect of angiotensin converting enzyme inhibitor (ACEI) captopril and angiotensin Ⅱ receptor antagonist losartan on the mRNA expression of matrix metalloproteinase (MMP)-1 and MMP-9 in vascular smooth muscle cells induced by angiotensin Ⅱ (Ang Ⅱ ).Methods Male Wistar rats' thoracic aortic vascular smooth muscle cells were cultured in vitro.The cultured cells were divided in to control group,Ang Ⅱ group,captopril group,losartan group,and captopril plus losartan group.Cells in all groups were collected at the culture end-point.MMP-1 and MMP-9 mRNA expressions were detected by RT-PCR method in the collected specimens,and the effects of Ang Ⅱ on MMP-1 and MMP-9 mRNA expression and the intervention effects of captopril and losartan were observed in different Ang Ⅱ concentrations and different action times to vascular smooth muscle cells.Results ( 1 ) MMP-1 mRNA expression gradually increased along with the increments of Ang Ⅱ concentration and the action time (P＜0.05),and the most significant concentration was 10-6 mol/L (P＜0.01).(2)Captopril (5 × 10-6 mol/L) and losartan (5 × 10-6mol/L) inhibited the action of AngⅡ (P＜0.05,P＜0.01).MMP-9 mRNA expression was 0.47±0.03 ,0.86 ± 0.04,0.94±0.14 and 1.12±0.19 vs.0.10±0.04 (P＜0.05,P＜0.01) respectively when Ang Ⅱ concentration was 10-7 ,10-6 ,10-5 and 10-4 mol/L respectively.Captopril (5 × 10-6mol/L) and losartan (5 × 10-6 mol/I) significantly inhibited the MMP-9 mRNA expression which was stimulated by Ang Ⅱ (P＜0.05,P＜0.01),especially in captopril plus losartan group.The MMP-9 mRNA expression increased with the prolonging of stimulating time of Ang Ⅱ,MMP-9 mRNA expression was earlier than that of MMP-1.Conclusions AngⅡ increases the expression of MMP-1 and MMP-9 of vascular smooth muscle cells in a dose-and time-dependence manner.Captopril and losartan inhibit the MMP-1 and MMP-9 mRNA expression of vascular smooth muscle cells induced by Ang Ⅱ ,and the inhibition is the strongest when losartan was combined with captopril.The inhibitive effects is positively correlated to action time.     

脑缺血预处理对脑缺血再灌注大鼠血脑屏障通透性和基质金属蛋白酶-9表达的影响

Objective To investigate the effects of ischemic preconditioning (IP) on blood-brain barrier permeability and matrix metalloproteinase-9 expression after cerebral ischemia reperfusion in rats.Methods A total of 154 Wistar rats were randomly divided into sham operation (n = 14),non-ischemic preconditioning (NIP,n = 70),and IP (n = 70) group.The latter two groups were redivided into 5 subgroups (n = 14 in each subgroup).A middle cerebral artery occlusion model was induced by intraluminal suture method.After 10 minutes IP,re-ischemia for 2 hours and reperfusion for 22 hours were performed at day 1,3,7,14,and 21,respectively.The infarct volume was detected using 2,3,5-triphenyltetrazolium chloride (TTC)staining.The BBB permeability were evaluated by measuring the content of the extravascular exudation of Evan's blue (EB).The degree of cerebral edema was evaluated using the wet-dry weight method.MMP-9 protein and mRNA expression were detected by immunohistochemical staining and in situ hybridization.Results Compared to the corresponding subgroups in the NIP group,the neurological deficit scores,infarct volume,EB content,and brain water content were decreased significantly,and MMP-9 protein and mRNA expression were down-regulated significantly in the day 1,3,and 7 subgroups in the IP group (P ＜ 0.05 or P ＜ 0.01 ).The infarct volume and MMP-9 mRNA expression of the day 1,3,7 subgroups in the IP group were more significantly reduced or down-regulated than those of the day 14 and21 subgroups in the IP group.The EB content,brain water content,and MMP-9 protein expression of the day 3 and 7 subgroups were more significantly lower than those in other subgroups.Among them,they were decreased most significantly in the day 3 subgroup (P ＜ 0.05).Conclusions The changes of IP-induced BBB permeability and the down-regulated MMP-9 expression may play important roles in cerebral ischemic tolerance.     

Regulation of activin receptor-interacting protein 2 expression in mouse hepatoma Hepa1-6 cells and its relationship with collagen type Ⅳ

AIM: To investigate the regulation of activin receptor-interacting protein 2 (ARIP2) expression and its possible relationships with collagen type Ⅳ (collagen Ⅳ) in mouse hepatoma cell line Hepal-6 cells. METHODS: The ARIP2 mRNA expression kinetics in Hepal-6 cells was detected by RT-PCR,and its regulation factors were analyzed by treatment with signal transduction activators such as phorbol 12-myristate 13-acetate (PMA),forskolin and A23187. After pcDNA3-ARIP2 was transfected into Hepal-6 cells,the effects of ARIP2 overexpression on activin type Ⅱ receptor (ActRⅡ) and collagen Ⅳ expression were evaluated. RESULTS: The expression levels of ARIP2 mRNA in Hapel-6 cells were elevated in time-dependent manner 12 h after treatment with activin A and endotoxin LPS,but not changed evidently in the early stage of stimulation (2 or 4 h). The ARIP2 mRNA expression was increased after stimulated with signal transduction activators such as PMA and forskolin in Hepal-6 cells,whereas decreased after treatment with A23187 (25.3% ± 5.7% vs 48.1% ± 3.6%,P < 0.01). ARIP2 overexpression could remarkably suppress the expression of ActRⅡA mRNA in dose-dependent manner,but has no effect on ActRⅡB in Hepal-6 cells induced by activin A. Furthermore,we have found that overexpression of ARIP2 could inhibit collagen Ⅳ mRNA and protein expressions induced by activin A in Hapel-6 cells. CONCLUSION: These findings suggest that ARIP2 expression can be influenced by various factors. ARIP2 may participate in the negative feedback regulation of signal transduction in the late stage by affecting the expression of ActRⅡA and play an important role in regulation of development of liver fibrosis induced by activin.     

Inhibition effect of captopril and losartan on expression of matrix metalloproteinase-1,-9 induced by angiotensin Ⅱ in rat vascular smooth muscle cells

Objective To investigate the effect of angiotensin converting enzyme inhibitor (ACEI) captopril and angiotensin Ⅱ receptor antagonist losartan on the mRNA expression of matrix metalloproteinase (MMP)-1 and MMP-9 in vascular smooth muscle cells induced by angiotensin Ⅱ (Ang Ⅱ ).Methods Male Wistar rats' thoracic aortic vascular smooth muscle cells were cultured in vitro.The cultured cells were divided in to control group,Ang Ⅱ group,captopril group,losartan group,and captopril plus losartan group.Cells in all groups were collected at the culture end-point.MMP-1 and MMP-9 mRNA expressions were detected by RT-PCR method in the collected specimens,and the effects of Ang Ⅱ on MMP-1 and MMP-9 mRNA expression and the intervention effects of captopril and losartan were observed in different Ang Ⅱ concentrations and different action times to vascular smooth muscle cells.Results ( 1 ) MMP-1 mRNA expression gradually increased along with the increments of Ang Ⅱ concentration and the action time (P＜0.05),and the most significant concentration was 10-6 mol/L (P＜0.01).(2)Captopril (5 × 10-6 mol/L) and losartan (5 × 10-6mol/L) inhibited the action of AngⅡ (P＜0.05,P＜0.01).MMP-9 mRNA expression was 0.47±0.03 ,0.86 ± 0.04,0.94±0.14 and 1.12±0.19 vs.0.10±0.04 (P＜0.05,P＜0.01) respectively when Ang Ⅱ concentration was 10-7 ,10-6 ,10-5 and 10-4 mol/L respectively.Captopril (5 × 10-6mol/L) and losartan (5 × 10-6 mol/I) significantly inhibited the MMP-9 mRNA expression which was stimulated by Ang Ⅱ (P＜0.05,P＜0.01),especially in captopril plus losartan group.The MMP-9 mRNA expression increased with the prolonging of stimulating time of Ang Ⅱ,MMP-9 mRNA expression was earlier than that of MMP-1.Conclusions AngⅡ increases the expression of MMP-1 and MMP-9 of vascular smooth muscle cells in a dose-and time-dependence manner.Captopril and losartan inhibit the MMP-1 and MMP-9 mRNA expression of vascular smooth muscle cells induced by Ang Ⅱ ,and the inhibition is the strongest when losartan was combined with captopril.The inhibitive effects is positively correlated to action time.     

Inhibition effect of captopril and losartan on expression of matrix metalloproteinase-1,-9 induced by angiotensin Ⅱ in rat vascular smooth muscle cells

Objective To investigate the effect of angiotensin converting enzyme inhibitor (ACEI) captopril and angiotensin Ⅱ receptor antagonist losartan on the mRNA expression of matrix metalloproteinase (MMP)-1 and MMP-9 in vascular smooth muscle cells induced by angiotensin Ⅱ (Ang Ⅱ ).Methods Male Wistar rats' thoracic aortic vascular smooth muscle cells were cultured in vitro.The cultured cells were divided in to control group,Ang Ⅱ group,captopril group,losartan group,and captopril plus losartan group.Cells in all groups were collected at the culture end-point.MMP-1 and MMP-9 mRNA expressions were detected by RT-PCR method in the collected specimens,and the effects of Ang Ⅱ on MMP-1 and MMP-9 mRNA expression and the intervention effects of captopril and losartan were observed in different Ang Ⅱ concentrations and different action times to vascular smooth muscle cells.Results ( 1 ) MMP-1 mRNA expression gradually increased along with the increments of Ang Ⅱ concentration and the action time (P＜0.05),and the most significant concentration was 10-6 mol/L (P＜0.01).(2)Captopril (5 × 10-6 mol/L) and losartan (5 × 10-6mol/L) inhibited the action of AngⅡ (P＜0.05,P＜0.01).MMP-9 mRNA expression was 0.47±0.03 ,0.86 ± 0.04,0.94±0.14 and 1.12±0.19 vs.0.10±0.04 (P＜0.05,P＜0.01) respectively when Ang Ⅱ concentration was 10-7 ,10-6 ,10-5 and 10-4 mol/L respectively.Captopril (5 × 10-6mol/L) and losartan (5 × 10-6 mol/I) significantly inhibited the MMP-9 mRNA expression which was stimulated by Ang Ⅱ (P＜0.05,P＜0.01),especially in captopril plus losartan group.The MMP-9 mRNA expression increased with the prolonging of stimulating time of Ang Ⅱ,MMP-9 mRNA expression was earlier than that of MMP-1.Conclusions AngⅡ increases the expression of MMP-1 and MMP-9 of vascular smooth muscle cells in a dose-and time-dependence manner.Captopril and losartan inhibit the MMP-1 and MMP-9 mRNA expression of vascular smooth muscle cells induced by Ang Ⅱ ,and the inhibition is the strongest when losartan was combined with captopril.The inhibitive effects is positively correlated to action time.     

Inhibition effect of captopril and losartan on expression of matrix metalloproteinase-1,-9 induced by angiotensin Ⅱ in rat vascular smooth muscle cells

Objective To investigate the effect of angiotensin converting enzyme inhibitor (ACEI) captopril and angiotensin Ⅱ receptor antagonist losartan on the mRNA expression of matrix metalloproteinase (MMP)-1 and MMP-9 in vascular smooth muscle cells induced by angiotensin Ⅱ (Ang Ⅱ ).Methods Male Wistar rats' thoracic aortic vascular smooth muscle cells were cultured in vitro.The cultured cells were divided in to control group,Ang Ⅱ group,captopril group,losartan group,and captopril plus losartan group.Cells in all groups were collected at the culture end-point.MMP-1 and MMP-9 mRNA expressions were detected by RT-PCR method in the collected specimens,and the effects of Ang Ⅱ on MMP-1 and MMP-9 mRNA expression and the intervention effects of captopril and losartan were observed in different Ang Ⅱ concentrations and different action times to vascular smooth muscle cells.Results ( 1 ) MMP-1 mRNA expression gradually increased along with the increments of Ang Ⅱ concentration and the action time (P＜0.05),and the most significant concentration was 10-6 mol/L (P＜0.01).(2)Captopril (5 × 10-6 mol/L) and losartan (5 × 10-6mol/L) inhibited the action of AngⅡ (P＜0.05,P＜0.01).MMP-9 mRNA expression was 0.47±0.03 ,0.86 ± 0.04,0.94±0.14 and 1.12±0.19 vs.0.10±0.04 (P＜0.05,P＜0.01) respectively when Ang Ⅱ concentration was 10-7 ,10-6 ,10-5 and 10-4 mol/L respectively.Captopril (5 × 10-6mol/L) and losartan (5 × 10-6 mol/I) significantly inhibited the MMP-9 mRNA expression which was stimulated by Ang Ⅱ (P＜0.05,P＜0.01),especially in captopril plus losartan group.The MMP-9 mRNA expression increased with the prolonging of stimulating time of Ang Ⅱ,MMP-9 mRNA expression was earlier than that of MMP-1.Conclusions AngⅡ increases the expression of MMP-1 and MMP-9 of vascular smooth muscle cells in a dose-and time-dependence manner.Captopril and losartan inhibit the MMP-1 and MMP-9 mRNA expression of vascular smooth muscle cells induced by Ang Ⅱ ,and the inhibition is the strongest when losartan was combined with captopril.The inhibitive effects is positively correlated to action time.     

糖化终末产物对INS-1细胞基质金属蛋白酶2表达的影响

目的 探讨糖化终末产物(AGEs)对大鼠胰岛细胞株INS-1基质金属蛋白酶2(MMP-2)表达量的影响.方法 培养INS-1细胞,检测MMP-2表达;制备糖化胎牛血清,通过流式细胞仪检测细胞内活性氧簇(ROS)水平,通过逆转录PCR、实时定量PCR和Western印迹方法观察细胞中MMP-2表达量的变化.结果 INS-1细胞中存在MMP-2的表达;AGEs刺激后ROS明显升高(P<0.05),刺激组细胞内MMP-2mRNA表达量和蛋白表达水平均显著高于对照组(P<0.05).结论 提示胰岛β细胞内存在MMP-2表达,AGEs可诱导β细胞MMP-2表达量增高,MMP-2在介导胰岛氧化应激损伤中可能起着重要作用.

Abstract：

Objective To explore the impact of advanced glycation end-products ( AGEs) on matrix metalloproteinase 2 ( MMP-2) expression in cultivated INS-1 cells. Method INS-1 cells were cultivated and MMP-2 expression was analyzed. Glycated serum was prepared for incubating with INS-1 cell. Reactive oxygen species (ROS) was detected by flow cytometry. The intracelluar MMP-2 expression was analyzed by RT-PCR, realtime PCR and Western blot. The MMP-2 cDNA was expressed in cultivated INS-1 cells. Result The level of ROS treated with AGEs was significantly higher than that in the control( P<0.05 ) , and the levels of MMP-2 and its protein expressions turned out as well( P<0. 05). Conclusion The results suggest that MMP-2 was expressed in INS-1 cells. Increased MMP-2 expression in ?cells may be induced by AGEs, suggesting that MMP-2 might play an important role in oxidative stress-mediated islet injury.     

Regulation of activin receptor-interacting protein 2 expression in mouse hepatoma Hepal-6 cells and its relationship with collagen type Ⅳ

AIM： To investigate the regulation of activin receptor-interacting protein 2 （ARIP2） expression and its possible relationships with collagen type Ⅳ （collagen Ⅳ） in mouse hepatoma cell line Hepal-6 cells.
METHODS： The ARIP2 mRNA expression kinetics in Hepal-6 cells was detected by RT-PCR, and its regulation factors were analyzed by treatment with signal transduction activators such as phorbol 12-myristate 13-acetate （PMA）, forskolin and A23187. After pcDNA3- ARIP2 was transfected into Hepal-6 cells, the effects of ARIP2 overexpression on activin type Ⅱ receptor （ActRⅡ） and collagen Ⅳ expression were evaluated.
RESULTS： The expression levels of ARIP2 mRNA in Hapel-6 cells were elevated in time-dependent manner 12 h after treatment with activin A and endotoxin LPS, but not changed evidently in the early stage of stimulation （2 or 4 h）. The ARIP2 mRNA expression was increased after stimulated with signal transduction activators such as PMA and forskolin in Hepal-6 cells, whereas decreased after treatment with A23187 （25.3% ± 5.7% vs 48.1% ± 3.6%, P 〈 0.01）. ARIP2 overexpression could remarkably suppress the expression of ActRⅡA mRNA in dose-dependent manner, but has no effect on ActRⅡB in Hepal-6 cells induced by activin A. Furthermore, we have found that overexpression of ARIP2 could inhibit collagen Ⅳ mRNA and protein expressions induced by activin A in Hapel-6 cells.
CONCLUSION： These findings suggest that ARIP2 expression can be influenced by various factors. ARIP2 may participate in the negative feedback regulation of signal transduction in the late stage by affecting the expression of ActRIIA and play an important role in regulation of development of liver fibrosis induced by activin.     

肺炎衣原体通过上调酰基辅酶A:胆固醇酰基转移酶1诱导人单核细胞株THP-1源性泡沫细胞形成的实验研究

Objective To investigate the expression changes of acyl-coenzyme A: cholesterol acyhransferase 1 (ACAT1) on Chlamydia pneumoniae (C. pn) induced foam cell formation. Methods Human monocytic cell line (THP-1) was induced into macrophages by 160 nmol/L phorbol myristate acetate (PMA)for 48 h, and were randomly allocated into four groups: negative control group (50 μg/ml LDL for 48 h) ; positive control group (50 μg/ml ox-LDL for48 h) ; C. pn infection group (50 μg/ml LDL plus 1× 105,4×105,5×105and 1×106 IFU C.pn for 48 h or 1×106 IFU C.pn for 0,24,48 and 72h); ACAT inhibitor 58-035 plus C. pn infection group (1, 5, 10 μg/ml ACAT inhibitor 58-035 pretreatment for 1 h,50 μg/ml LDL and 1 × 106 IFU C. pn for 48 h). The mRNA and protein expressions of ACATI were determined by RT-PCR and Western blot, respectively. Lipid droplets in cytoplasm were observed by oil red 0 staining. The contents of intracellular cholesteryl esters were detected by enzyme-fluorescence. Results The mRNA and protein expressions of ACATI were significantly up-regulated in positive control cells compared those in negative control cells and further upregulated by C. pn infection in a time-dependent and concentration-dependent manner (all P ＜ 0.05). There were significantly increases in the accumulation of lipid droplets and the ratio of cholesteryl ester to total cholesterol in positive control cells as compared with negative control cells and these were further aggravated by C. pn (at the concentrations of 5× 105 and 1×106IFU for 48 h) and C. pn infection induced increases in the accumulation of lipid droplets and the ratio of cholesteryl ester to total cholesterol could he significantly attenuated by ACAT inhibitor 58-035 (all P ＜ 0.05). Conclusion Chlamydia pneumoniae induces THP-1-derived foam cell formation by up-regulating the expression of ACATI.     

EMMPRIN/CD147对类风湿关节炎患者滑膜成纤维细胞合成基质金属蛋白酶的刺激作用

目的 观察细胞外基质金属蛋白酶诱导剂（EMMPRIN／CD147）对类风湿关节炎（RA）患者滑膜成纤维细胞（FLS）合成基质金属蛋白酶（MMPs）的作用。方法 手术切除的RA患者的滑膜组织，分离成FLS，传代培养。明胶酶谱法测FLS的MMPs含量将FLS与高表达EMMPRIN／CD147的单核细胞株（THP）-1共培养，观察THP-1细胞对FLS MMPs表达量的影响，同时观察EMMPRIN／CD147拮抗肽激活蛋白（AP）-9对FLS MMPs表达的影响。结果 THP-1细胞表达高水平的CD147，而MMP-2、MMP-9的表达水平很低；分离的FLS表达低水平的CD147和一定水平的MMP-2、MMP-9。二者混合培养后，FLS表达MMP-2、MMP-9水平显著升高，随着THP-1细胞数的增加，MMP-2、MMP-9的合成量也增加THP-1对FLS合成MMP-2、MMP-9的刺激作用可被CD147拮抗肽AP-9所抑制。结论 CD147对RA患者FLS合成MMP-2、MMP-9有刺激作用，而这种刺激作用呵被CD147拮抗肽AP-9所抑制。     

Sinomenine reduces invasion and migration ability in fibroblast-like synoviocytes cells co-cultured with activated human monocytic THP-1 cells by inhibiting the expression of MMP-2, MMP-9, CD147

CD147 expressed by monocytes, macrophages, and synoviocytes cells can stimulate the production of matrix metalloproteinases (MMPs) associated with the development of rheumatoid arthritis (RA). We investigated the effects of Sinomenine (SIN) on invasion and migration ability and gene expression of CD147, MMP-2, MMP-9 of fibroblast-like synoviocytes cells (FLS) co-cultured with activated human monocytic THP-1 cells (A-THP-1) in vitro. SIN is a pure alkaloid extracted from the Chinese medical plant Sinomenium acutum. FLS cells were co-cultured with THP-1 cells which were induced to differentiate into macrophages with phorbol 12-myristate 13-acetate (PMA). Cells were treated with different concentrations of SIN. Invasion and migration ability of cells was tested by transwell assays. Western blot analysis and zymographic analysis were adopted to detect the expression of CD147 and MMPs, respectively. RT–PCR was used to determine the expression of mRNA of CD147, MMP-2, and MMP-9. The invasion and migration ability of the co-cultured cells was significantly inhibited by SIN in a concentration-dependent fashion, and at the same time, the levels of CD147, MMP-2, MMP-9 were markedly down-regulated. This inhibitory effect was most notable at concentrations of 0.25 and 1.00 mM (P < 0.01). Our results point to a possible mechanism of SIN on treatment of RA is the inhibitory effect of SIN on cell invasion and migration ability, which strongly correlates with repressing the expression of CD147, MMP-2, and MMP-9.     

9-顺式维甲酸抑制PMA诱导人单核细胞系THP-1表达MMP-9

目的探讨视黄醛X受体（retinoid X receptors,RXRs）特异性激动剂9-顺式维甲酸（9-cisRA）对佛波酯（PMA）诱导人单核细胞系THP-1基质金属蛋白酶-9（MMP-9）表达及活性的影响。方法体外培养THP-1细胞,PMA诱导分化为巨噬细胞,采用9-cisRA对不同浓度PMA组进行干预,应用Realtime-PCR、Westerblotting测定THP-1细胞MMP-9的基因和蛋白水平表达水平,通过Gelatin Zymography法检测MMP-9的酶活性。结果9-cisRA（100nmol/L）对不同浓度PMA组（10、20和40 nmol/L）干预24 h,9-cisRA可明显抑制THP-1细胞MMP-9转录水平,MMP-9的mRNA抑制率分别28%、60%、88%（P<0.01）。MMP-9蛋白水平及酶活性也呈显著下降。结论RXRs特异性激动剂9-cisRA可显著抑制PMA诱导THP-1的MMP-9转录和蛋白水平表达及其酶活性。     

替米沙坦对体外培养THP-1源性巨噬细胞MMP-9与CD40/CD40L表达的影响

目的:通过观察替米沙坦对体外培养的THP-1源性巨噬细胞基质金属蛋白酶9(MMP-9)及白细胞分化抗原CD40/CD40L表达的影响,揭示替米沙坦抗炎作用的可能机制,同时明确替米沙坦的心血管保护作用。方法:用一定浓度的血管紧张素Ⅱ(AngⅡ)(10 000 nmol/L)诱导体外培养的巨噬细胞,与不同浓度的替米沙坦共同孵育,以MMP-9和CD40/CD40L为指标,应用RT-PCR方法分别检测MMP-9和CD40/CD40L mRNA表达。结果:替米沙坦可同时下调AngⅡ刺激后的MMP-9、CD40和CD40L mRNA的表达,有剂量依赖性。替米沙坦100 nmol/L、1 000 nmol/L、10 000 nmol/L时,MMP-9mRNA的表达与AngⅡ组相比分别下降24%、42%及62%;CD40、CD40LmRNA的表达与AngⅡ组相比分别下降24%、39%、55%、16%、32%及40%。结论:替米沙坦体可下调外培养巨噬细胞MMP-9的表达,从而具有抗炎及稳定斑块作用,其作用机制与抑制CD40/CD40L通路有关。     

白藜芦醇抑制可溶性CD40配体作用下巨噬细胞基质金属蛋白酶-9的表达

目的 探讨白藜芦醇抑制可溶性CD40配体(sCD40L)作用下对巨噬细胞基质金属蛋白酶-9(MMP-9)表达的影响.方法 佛波酯诱导人单核细胞株(THP-1)细胞分化为巨噬细胞.依次给予白藜芦醇和可溶性sCD40L孵育细胞,利用半定量反转录-聚合酶链反应(RT-PCR)、蛋白免疫印迹法、明胶酶谱法检测巨噬细胞内MMP-9和组织基质金属蛋白酶抑制因子-1(TIMP-1)基因的转录、蛋白表达和酶活性.结果 给予sCD40L刺激后巨噬细胞内MMP-9基因转录增多(1.53±0.04与0.75±0.01,P<0.05),蛋白分泌明显增加(244 930.8±31 268.6与192 976.8±20 223.1,P<0.05);白藜芦醇可抑制巨噬细胞MMP-9基因转录及蛋白分泌(P<0.01),降低MMP-9酶活性(P<0.05),升高巨噬细胞TIMP-1基因转录和蛋白分泌(P<0.05).结论 白藜芦醇可以抑制CD40途径活化的巨噬细胞内MMP-9的表达,调节MMP-9的活性,这可能是其抗动脉粥样硬化、稳定粥样斑块的作用机制之一.     

CD147基因沉默对兔外周血单核巨噬细胞基质金属蛋白酶表达的影响

目的筛选出高效抑制兔外周血单核巨噬细胞中CD147表达的短链RNA(shRNA)慢病毒载体,观察CD147基因沉默后对基质金属蛋白酶(MMP)的影响。方法兔源CD147 mRNA序列,设计并构建shRNA慢病毒载体,实验分为空白组,阴性组,加CD147 shRNA慢病毒干扰依次为A组、B组、C组、D组,将其分别转染兔外周血单核巨噬细胞,72 h后观察转染效果,用RT-PCR测CD147 mRNA表达,ELISA法测CD147 MMP-2及MMP-9蛋白表达。结果 A、B、C、D组CD147 mRNA及CD147、MMP-2和MMP-9蛋白较空白组显著减少(P<0.01),A组CD147 mRNA和蛋白降低最显著,较空白组分别减少57.7%和50.9%(P<0.01),MMP-2、MMP-9蛋白表达分别减少95.9%和45.4%。结论成功构建并筛选出能高效、且特异阻断CD147基因表达的shRNA慢病毒载体。CD147基因沉默后,MMP-2和MMP-9表达明显减少,可能成为防治动脉粥样硬化新的治疗靶点。     

CD147分子和基质金属蛋白酶在类风湿关节炎滑膜中的表达

目的 探讨类风湿关节炎(RA)滑膜组织CD147的表达及其与基质金属蛋白酶(MMP)-01和MMP-2表达的相关性。方法 采用免疫组织化学SP(streptavidin／peroxidase)染色方法检测11例RA患者受损关节软骨-血管翳接合部（CPJ)滑膜组织中CD147和MMP-1及MMP-2的表达，并与3例骨关节炎（OA)患者滑膜组织CD147和MMP-1及MMP-2的检测相对照。结果 3例OA滑膜组织CD147和MMP-1及MMP-2的表达均为阴性，而11例RA滑膜组织中均有CD147和MMP-1及MMP-2的表达。其中，表达CD147的细胞为单核-巨噬细胞、淋巴细胞和滑膜成纤维样细胞，表达MMP-1及MMP-2的细胞为滑膜成纤维样细胞。统计学分析表明RA滑膜细胞CD147的表达和MMP-1及MMP-2的表达间存在显著相关性。结论 CD147在RA滑膜组织中表达增高，可能是导敏RA受损关节软骨、骨基质降解的重要因素之一。     

NF—κB对外周血单核细胞MMP-9 mRNA表达的影响

目的探讨核因子-κB（NF-κB）对外周血单核细胞基质金属蛋白酶9（MMP-9）mRNA表达的影响,以及二者与冠状动脉粥样硬化斑块不稳定性的关系。方法分离收集冠心病患者的外周血单核细胞,分别在不含血清的RPMI-1640中单独（空白对照组）或者加入氧化低密度脂蛋白（Oox-LDL）（ox-LDL组）孵育24h或先加PDTC（NF-κB抑制剂）（PDTC组）（10^-5mol／L）培育1h后加OX—LDL（40μg／ml）继续孵育24h,收集单核细胞提取总RNA,并用BT-PCR方法测定MMP-9、组织金属蛋白酶抑制物1（TIMP-1）mRNA的表达,采用ELISA法测定上清液中MMP-9、TIMP-1浓度。结果细胞上清液中MMP-9蛋白及单核细胞MMP-9mRNA表达增加（P〈0．01）。与空白对照组比较,ox-LDL组PDTC表达减少（P〈0．05）;TIMP-1 mRNA表达及细胞上清液中TIMP-1蛋白含量在各组间无统计学差异。结论OX-LDL可诱导人单核细胞MMP-9表达增加,并且NF-κB也参与了OX—LDL对MMP-9表达的促进作用,但对TIMP-1表达无影响。     

来氟米特对狼疮肾炎患者T细胞表面共刺激分子谱影响的体外研究

目的 了解来氟米特(LEF)对狼疮肾炎(LN)患者外周血T淋巴细胞表面共刺激分子谱的表达模式有无作用.方法 密度梯度离心法提取LN患者及健康对照外周血单个核细胞(PBMCs),设立4个培养组:空白组,植物血凝素(PHA)组,LEF组,PHA+LEF组.双色标记流式细胞术检测PBMCs中T细胞表面分子CD28,CD40L,淋巴细胞功能相关抗原(LFA)-1a和细胞毒T淋巴细胞相关抗原(CTLA)-4的表达水平.多组间比较采用单因素方差分析.结果 活动性LN组外周血T细胞表面CD28、CD40L、L FA-1a和CTLA-4表达水平较健康对照组明显上调CD28:33.4±6.5和14.4±3.2;CD40L:13.2±3.2和5.4±2.3;LFA-1a:8.5±2.3和2.2±1.1;CTLA-4:4.6±1.5(P均＜0.01);PHA可诱导健康对照T细胞表面CD28和CD40L表达明显上调CD28:26.8±6.7和14.4±3.2;CD40L:13.9±4.9和5.4±2.3(P均＜0.01),但对其CTLA-4和LFA-1α的表达无明显影响(P均＞0.05);而PHA对活动性LN组外周血T细胞表面上述指标表达均有明显上调作用CD28:54.8±9.5和33.4±6.5;CD40L;49.9±9.1和13.3±3.2;LFA-1a:25.5±7.5和8.5±2.3;CTLA-4:10.5±2.8和7.7±1.4(P均＜0.05);LEF活性代谢产物A771726对健康人外周血T细胞表面上述指标的表达无明显影响,但可逆转活动性LN患者外周血T细胞表面的CD40L、LFA-1α过度表达(P均＜0.05),对其CD28和CTLA-4过度表达无明显影响(P均＞0.05);且A771726对PHA所诱导的活动性LN患者外周血T细胞表面CD28、CD40L和LFA-1a表达增加亦有明显抑制(P均＜0.05).结论 LEF可下调活动性LN患者外周血T细胞CD40L和LFA-1a表达,而对其CD28和CTLA-4表达无明显抑制作用,可能是其有效治疗LN的重要机制之一.     

原发性干燥综合征患者唇腺组织中MMP-9与CD147的表达及意义

目的 探讨基质金属蛋白酶(MMP)-9、细胞外基质金属蛋白酶诱导因子(CD147)在原发性干燥综合征(pSS)发病过程中的作用及意义.方法 采用免疫组织化学方法对52例pSS患者、30名正常对照组唇腺中MMP-9、CD147表达进行描述,并对二者表达的相关性进行分析.结果 pSS组MMP-9均阳性高表达,对照组MMP-9亦阳性表达,表达的强度较pSS组低(P<0.05),随淋巴细胞浸润灶数的增加而表达增强.CD147在对照组的23例阳性低表达,PSS组52例CD147阳性高表达,强度较对照组高(P<0.05),随淋巴细胞浸润灶数的增加而表达增强.MMP-9与CD147的表达呈正相关(P<0.01 .结论 MMP-9、CD147在pSS患者唇腺组织中异常表达,均参与pSS的发病过程.