Effect of allogeneic platelet transfusion on migration and invasion of human lung cancer A549 cells and its mechanism of action / 中国肿瘤生物治疗杂志

@#[Abstract] Objective: To observe the effect of allogeneic platelets transfusion on the invasion and metastasis of human lung cancer A549 cells, and to preliminarily explore its mechanism of action. Methods: Eighty-nine patients with advanced lung cancer, who had received platelet transfusion in the Chemotherapy Department of Fourth Hospital of Hebei Medical University between January 2017 and December 2018, were enrolled in this study. The study cells were randomized into Ctrl group (A549 cells co-incubated with culture medium), Before group, and After group (A549 cells co-incubated with plasma Before and After platelet transfusion, respectively). The migration and invasion of A549 cells co-cultured with plasma before and after platelet transfection were detected by Scratch and Transwell experiments. The expression of MMPs, TIMPs and epithelial-mesenchymal transition (EMT) related proteins E-cadherin, N-cadherin and Vimentin, as well as vascular endothelial growth factor (VEGF) and its receptor 2 (VEGFR2) were detected by Western blotting (WB) method. Results: The scratch healing ability of A549 cells in After group was significantly higher than that of Ctrl group and Before group [(73.67±2.60)% vs (58.33±2.33)%, (35.33±2.03) %; P<0.01, vs Ctrl group; P<0.05, vs Before group], and there was also a significant difference between Before group and Ctrl group (P<0.05). The results of cell migration experiment showed that the number of transmembrane cells in After group was significantly higher than that in Ctrl group and Before group [(69.67±7.84) vs (18±2.08) and (39.33±2.03), all P<0.01]. The cell invasion experiment showed that the number of transmembrane cells in After group was significantly higher than that in Ctrl group and Before group [(59.34±3.46) vs (18.34±1.56) and (37.58±2.79), all P<0.01]. When A549 cells were co-incubated with plasma before and after platelet transfusion for 48 h, it was found that the expressions of MMP9 and MMP2 were increased (P<0.05), while their inhibitors TIMP1 and TIMP2 were decreased (P<0.01); the expressions of EMT-related proteins N-cadherin and Vimentin were increased (P<0.05), but E-cadherin was decreased (P<0.01); the expressions of angiogenesis related proteins VEGF and VEGFR2 were increased (P<0.05). Conclusion: Alloplatelets transfusion can promote the invasion and metastasis of lung cancer A549 cells, which may be realized by regulation of the expressions of EMT, metallomatrix protease and vascular growth factor-related proteins.

Effect of Shengmai capsules on MMP-3&TIMP-1 of cardiac muscle in rats with chronic congestive heart failure / 中华中医药杂志

Objective:To research the effect of Shengmai capsules on the matrix metalloproteinase(MMPs)& tissue inhibitor of metalloproteinase(TIMPs)in chronic congestive heart failure(CHF)rats.Methods:75 SD female rats weredivided randomly into 5 groups:sham-operation group(A),CHF model group(B),CHF model treated by Shengmai capsules group(Shengmai capsule group,C),CHF model treated by Captopril group(Captopril group,D),CHF model treated by Shengmai capsule and Captopril group(shengmai capsule&captopril group,E),15 rats each group.Suprarenal abdominal artery constriction was operated to prepare CHF rat models.After 7 week treating respectively,the contents of MMP-3&TIMP-1 of cardiac muscle in rats were detected.Results:The content of cardiac MMP-3 was higher in group B than in group A(P

Matrix metalloproteinases in human gliomas: activation of matrix metalloproteinase-2 (MMP-2) may be correlated with membrane-type-1 matrix metalloproteinase (MT1-MMP) expression

To evaluate possible roles of matrix metalloproteinase (MMP)-1, -2, tissue inhibitor of metalloproteinase (TIMP)-1, -2 and membrane-type-1 matrix metalloproteinase (MT1-MMP) in invasion of human gliomas, expressions of these proteins were investigated in ten cases of human glioma and two meningioma tissues and eight human glioma cell lines. In gelatin zymography, MMP-2 activities of glioblastomas were higher than astrocytomas. The activated form of MMP-2 was seen in five of six cases of glioblastomas, but not in astrocytomas. MMP-9 activity was detected in all cases of malignant astrocytomas but the reactivity of MMP-9 was weaker than that of MMP-2. MT1-MMP mRNA expression in glioblastomas was higher than that in astrocytomas. Five cases of glioblastomas with activated form of MMP-2 had MT1-MMP expressions. In vitro, human glioma cell lines with high expression of MT1-MMP also showed high MMP-2 activity. TIMP-1 transcripts were constitutively present in almost all glioma tissues and cell lines, whereas TIMP-2 mRNA were weak especially in malignant gliomas. Imbalance of TIMP-2/MMP-2 was observed using immunoprecipitation analysis in a glioma cell line. High expression of MMP-2 and MT1-MMP is possibly involved in invasiveness of malignant glioma.

Matrix metalloproteinases in human gliomas: activation of matrix metalloproteinase-2 (MMP-2) may be correlated with membrane-type-1 matrix metalloproteinase (MT1-MMP) expression

To evaluate possible roles of matrix metalloproteinase (MMP)-1, -2, tissue inhibitor of metalloproteinase (TIMP)-1, -2 and membrane-type-1 matrix metalloproteinase (MT1-MMP) in invasion of human gliomas, expressions of these proteins were investigated in ten cases of human glioma and two meningioma tissues and eight human glioma cell lines. In gelatin zymography, MMP-2 activities of glioblastomas were higher than astrocytomas. The activated form of MMP-2 was seen in five of six cases of glioblastomas, but not in astrocytomas. MMP-9 activity was detected in all cases of malignant astrocytomas but the reactivity of MMP-9 was weaker than that of MMP-2. MT1-MMP mRNA expression in glioblastomas was higher than that in astrocytomas. Five cases of glioblastomas with activated form of MMP-2 had MT1-MMP expressions. In vitro, human glioma cell lines with high expression of MT1-MMP also showed high MMP-2 activity. TIMP-1 transcripts were constitutively present in almost all glioma tissues and cell lines, whereas TIMP-2 mRNA were weak especially in malignant gliomas. Imbalance of TIMP-2/MMP-2 was observed using immunoprecipitation analysis in a glioma cell line. High expression of MMP-2 and MT1-MMP is possibly involved in invasiveness of malignant glioma.

Effects of phycocyanin on the expressions of matrix metalloproteinase 2 and 9 after cerebral ischemia-reperfusion in rats / 中国海洋药物

Objective To study the effects of phycocyanin on the expressions of matrix metalloproteinase 2 and 9(MMP-2 and MMP-9) after focal cerebral ischemic reperfusion in rats.Methods A rat middle cerebral artery occlusion/reperfusion(MCAO/R) model was built up using the intraluminal filament method and treated by phycocyanin.The brain water content(BWC) was calculated with dry-wet method and the Evans blue(EB) of the brain was measured with the method of colorimetry.The expressions of MMP-2 and MMP-9 were determined by immunohistochemical assay.Results The BWC and EB of the brain increased after cerebral ischemic reperfusion and peaked at reperfusion 2d,and decreased after applying phycocyanin.In control group,the upregulation of MMP-2 began at ischemic reperfusion 24h,reached a maximum at 3～7d,then subsided gradually,but was still in high level at 14d.In phycocyanin group,the expressing time-phase pattern of MMP-2 was similar to and significantly lower than that in control group at same time.In control group,the upregulation of MMP-9 began at ischemic reperfusion 6h,increased at 12h and reached a maximum at 2d,then subsided gradually at 3d to sham group level at 14d.In the phycocyanin group,the expression of MMP-9 was significantly lower than that in control group,and the time-phase pattern of MMP-9 was similar to that in control group.Conclusions Phycocyanin might play an neuroprotective effect by down regulating the expressions of MMP-2 and MMP-9 to reduce brain edema after cerebral ischemic reperfusion.