Warning: Undefined variable $zfal in C:\Inetpub\vhosts\kidney.de\httpdocs\mlpefetch.php on line 525
Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in C:\Inetpub\vhosts\kidney.de\httpdocs\mlpefetch.php on line 525
Warning: Undefined variable $sterm in C:\Inetpub\vhosts\kidney.de\httpdocs\mlpefetch.php on line 530
 free
Warning: Undefined variable $sterm in C:\Inetpub\vhosts\kidney.de\httpdocs\mlpefetch.php on line 531
 free
 free
 
English Wikipedia
Nephropedia Template TP (
Twit Text
DeepDyve
Pubget Overpricing |  
lüll
Calcium deposition in osteoarthritic meniscus and meniscal cell culture Sun Y; Mauerhan DR; Honeycutt PR; Kneisl JS; Norton HJ; Zinchenko N; Hanley EN Jr; Gruber HEArthritis Res Ther 2010[]; 12 (2): R56INTRODUCTION: Calcium crystals exist in the knee joint fluid of up to 65% of osteoarthritis (OA) patients and the presence of these calcium crystals correlates with the radiographic evidence of hyaline cartilaginous degeneration. This study sought to examine calcium deposition in OA meniscus and to investigate OA meniscal cell-mediated calcium deposition. The hypothesis was that OA meniscal cells may play a role in pathological meniscal calcification. METHODS: Studies were approved by our human subjects Institutional Review Board. Menisci were collected during joint replacement surgeries for OA patients and during limb amputation surgeries for osteosarcoma patients. Calcium deposits in menisci were examined by alizarin red staining. Expression of genes involved in biomineralization in OA meniscal cells was examined by microarray and real-time RT-PCR. Cell-mediated calcium deposition in monolayer culture of meniscal cells was examined using an ATP-induced (45)calcium deposition assay. RESULTS: Calcium depositions were detected in OA menisci but not in normal menisci. The expression of several genes involved in biomineralization including ENPP1 and ANKH was upregulated in OA meniscal cells. Consistently, ATP-induced calcium deposition in the monolayer culture of OA meniscal cells was much higher than that in the monolayer culture of control meniscal cells. CONCLUSIONS: Calcium deposition is common in OA menisci. OA meniscal cells calcify more readily than normal meniscal cells. Pathological meniscal calcification, which may alter the biomechanical properties of the knee meniscus, is potentially an important contributory factor to OA.|Adenosine Triphosphate/pharmacology[MESH]|Adult[MESH]|Aged[MESH]|Anthraquinones/chemistry[MESH]|Calcium/analysis/metabolism[MESH]|Cells, Cultured[MESH]|Child[MESH]|Chondrocalcinosis/metabolism/*pathology[MESH]|Chondrocytes/drug effects/metabolism/*pathology[MESH]|Female[MESH]|Gene Expression[MESH]|Humans[MESH]|Knee Joint/metabolism/*pathology[MESH]|Male[MESH]|Menisci, Tibial/metabolism/*pathology[MESH]|Middle Aged[MESH]|Oligonucleotide Array Sequence Analysis[MESH]|Osteoarthritis, Knee/metabolism/*pathology[MESH]|Phosphate Transport Proteins/genetics/metabolism[MESH]|Phosphoric Diester Hydrolases/genetics/metabolism[MESH]|Pyrophosphatases/genetics/metabolism[MESH]|RNA, Messenger/metabolism[MESH]|Reverse Transcriptase Polymerase Chain Reaction[MESH]|Up-Regulation[MESH] |
