TGF-β1-stimulation of matrix metalloproteinase-13 expression by down-regulation of miR-203a-5p in rat osteoblasts

2019 ◽  
Vol 132 ◽  
pp. 541-549 ◽  
Author(s):  
S. Saiganesh ◽  
R. Saathvika ◽  
B. Arumugam ◽  
M. Vishal ◽  
V. Udhaya ◽  
...  
2018 ◽  
Vol 119 (7) ◽  
pp. 6181-6193 ◽  
Author(s):  
Vishal Mohanakrishnan ◽  
Arumugam Balasubramanian ◽  
Gokulnath Mahalingam ◽  
Nicola Chennell Partridge ◽  
Ilangovan Ramachandran ◽  
...  

2020 ◽  
Vol 235 (11) ◽  
pp. 7996-8009 ◽  
Author(s):  
Desai Malavika ◽  
Srinivasan Shreya ◽  
Vembar Raj Priya ◽  
Muthukumar Rohini ◽  
Zhiming He ◽  
...  

2013 ◽  
Vol 126 (7) ◽  
pp. 497-506 ◽  
Author(s):  
Javier Beaumont ◽  
Begoña López ◽  
Nerea Hermida ◽  
Blanche Schroen ◽  
Gorka San José ◽  
...  

We have found an association of miR-122 down-regulation with myocardial fibrosis in AS patients, probably through TGF-β1 up-regulation and stimulation of the enzymatic systems involved in extracellular collagen type I synthesis and deposition.


2005 ◽  
Vol 98 (2) ◽  
pp. 194-199 ◽  
Author(s):  
Kiyoshi Migita ◽  
Taichiro Miyashita ◽  
Yumi Maeda ◽  
Takahiko Aoyagi ◽  
Yojiro Kawabe ◽  
...  

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Kanagaraj Gomathi ◽  
Muthukumar Rohini ◽  
Nicola C. Partridge ◽  
Nagarajan Selvamurugan

Abstract Transforming growth factor beta 1 (TGF-β1) functions as a coupling factor between bone development and resorption. Matrix metalloproteinase 13 (MMP13) is important in bone remodeling, and skeletal dysplasia is caused by a deficiency in MMP13 expre-ssion. Runx2, a transcription factor is essential for bone development, and MMP13 is one of its target genes. TGF-β1 promoted Runx2 phosphorylation, which was necessary for MMP13 production in osteoblastic cells, as we previously shown. Since the phosphorylation of some proteins causes them to be degraded by the ubiquitin/proteasome pathway, we hypothesized that TGF-β1 might stabilize the phosphorylated Runx2 protein for its activity by other post-translational modification (PTM). This study demonstrated that TGF-β1-stimulated Runx2 acetylation in rat osteoblastic cells. p300, a histone acetyltransferase interacted with Runx2, and it promoted Runx2 acetylation upon TGF-β1-treatment in these cells. Knockdown of p300 decreased the TGF-β1-stimulated Runx2 acetylation and MMP13 expression in rat osteoblastic cells. TGF-β1-treatment stimulated the acetylated Runx2 bound at the MMP13 promoter, and knockdown of p300 reduced this effect in these cells. Overall, our studies identified the transcriptional regulation of MMP13 by TGF-β1 via Runx2 acetylation in rat osteoblastic cells, and these findings contribute to the knowledge of events presiding bone metabolism.


2002 ◽  
Vol 364 (1) ◽  
pp. 181-190 ◽  
Author(s):  
Heather STANTON ◽  
Linh UNG ◽  
Amanda J. FOSANG

Fragments of fibronectin occur naturally in vivo and are increased in the synovial fluid of arthritis patients. We have studied the 45kDa fragment (Fn-f 45), representing the N-terminal collagen-binding domain of fibronectin, for its ability to modulate the expression of metalloproteinases by porcine articular chondrocytes in vitro. We report that stimulation of cultured chondrocytes, or cartilage explants, with Fn-f 45 increased the levels of matrix metalloproteinase-13 (MMP-13; collagenase-3) released into the conditioned medium in a dose-dependent manner. Increased levels of MMP-13 were due to stimulation of MMP-13 synthesis, rather than release of MMP-13 from accumulated matrix stores. Fn-f 45 also stimulated the synthesis of MMP-3 (stromelysin-1) from cultured chondrocytes and cartilage cultures. The Fn-f 45-induced increase in MMP-3 and MMP-13 synthesis occurred via an interleukin 1-independent mechanism, since the receptor antagonist of interleukin-1 was unable to block the increased synthesis. The gelatinases, MMP-2 and MMP-9, were not modulated by Fn-f 45 in these culture systems. Fn-f 45 also stimulated the release of aggrecan from cartilage explants into conditioned medium. Neoepitope antibodies specific for aggrecan fragments generated by MMPs or aggrecanases showed that the Fn-f 45-induced aggrecan loss was mediated by aggrecanases, and not by MMPs. Extracts of cultured cartilage contained elevated levels of the aggrecanase-derived ITEGE373-G1 domain, whereas levels of the matrix metalloproteinase-derived DIPEN341-G1 domain were unchanged. These studies show that Fn-f 45 can induce a catabolic phenotype in articular chondrocytes by up-regulating the expression of metalloproteinases specific for the degradation of collagen and aggrecan.


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