scholarly journals Subtractive Cloning Identifies Tissue Inhibitor of Matrix Metalloproteinase-1 (TIMP-1) Increased Gene Expression Following Focal Stroke

Stroke ◽  
1998 ◽  
Vol 29 (2) ◽  
pp. 516-520 ◽  
Author(s):  
Xinkang Wang ◽  
Frank C. Barone ◽  
Raymond F. White ◽  
Giora Z. Feuerstein
1999 ◽  
pp. 583-589 ◽  
Author(s):  
B Hirsch ◽  
I Knoke ◽  
S Leonhardt ◽  
L Pitzel ◽  
H Jarry ◽  
...  

Since structural luteolysis involves deterioration of tissue, the gene expression of matrix-metalloproteinase-1 (MMP-1) and the respective tissue inhibitor of this metalloprotease (TIMP-1) were measured at various times on the day of pro-oestrus and in animals in which the preovulatory prolactin surge was blocked for the duration of 3 cycles by bromocriptine. An additional group of prolactin-blocked rats received a prolactin replacement injection on the afternoon of pro-oestrus. In spontaneously pro-oestrous rats, MMP-1 and TIMP-1 gene expression increased significantly (P<0.01) prior to the occurrence of the preovulatory LH surge but simultaneously with the onset of the preovulatory prolactin surge. When prolactin release was blocked by bromocriptine for 3 cycles, no such changes were observed during the afternoon of pro-oestrus. However, an intraperitoneal injection of bovine prolactin at the time when the preovulatory prolactin surge occurs normally, increased MMP-1 and TIMP-1 gene expression (P<0.01). These results indicate that MMP-1 and TIMP-1 gene expression are stimulated by the preovulatory prolactin surge. Previous work has shown that the preovulatory LH surge activates the enzymatic cascade which leads to increased collagenase activity.


2007 ◽  
Vol 20 (6) ◽  
pp. 825-836 ◽  
Author(s):  
Henning Meier ◽  
Jörg Bullinger ◽  
Alexander Deten ◽  
Grit Marx ◽  
Steffen Rabald ◽  
...  

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