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Forskningsartikel2011Vetenskapligt granskad

Evaluation of plasma activity of matrix metalloproteinase-2 and -9 in dogs with myxomatous mitral valve disease

Bersås Ljungvall, Ingrid; Rajamäki, Minna M; Crosara, Serena; Olsen, Lisbeth H; Kvart, Clarence; Borgarelli, Michele; Höglund, Katja; Häggström, Jens


Objective-To investigate whether plasma activity of matrix metalloproteinase (MMP)-2 and -9 was associated with severity of myxomatous mitral valve disease (MMVD) in dogs and to assess potential associations between MMP activity and dog characteristics, echocardiographic variables, systolic arterial blood pressure (SAP), heart rate, cardiac troponin I (cTnI) concentration, and C-reactive protein concentration.Animals-75 client-owned dogs.Procedures-Severity of MMVD was assessed by use of echocardiography. Plasma activity of latent (pro-MMP) and active MMP-2 and -9 was analyzed via zymography. Plasma concentration of cTnI was analyzed with a high-sensitivity cTnI assay, and C-reactive protein concentration was analyzed with a canine-specific ELISA.Results-Pro MMP-9, active MMP-9, and pro MMP-2 were detected, but active MMP-2 was not. No significant differences were found in MMP concentrations among the 4 MMVD severity groups. Activity of pro MMP-9 decreased with decreases in SAP and was higher in male dogs than in female dogs. Activity of MMP-9 decreased with increases in left ventricular end-systolic dimension and with decreases in SAP and cTnI concentration. Left ventricular end-systolic dimension was the variable most strongly associated with MMP-9 activity. No associations were found between the activity of pro MMP-2 and investigated variables.Conclusions and Clinical Relevance-Plasma MMP-9 activity decreased with increases in the end-systolic left ventricular internal dimension and decreases in SAP Hence, evaluation of MMP-9 activity has the potential to provide unique information about the myocardial remodeling process in dogs with MMVD. (Am J Vet Res 201172:1022-1028)

Publicerad i

American Journal of Veterinary Research
2011, Volym: 72, nummer: 8, sidor: 1022-1028