Document Type : Original Article
Department of Clinical Pathology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
Recently, matrix metalloproteinases (MMP), in particular the gelatinases MMP-2 and MMP-9, generally considered as tumor markers for clinical applications. A longitudinal 2-years follow-up survey was performed on dogs with cutaneous tumor. Serum samples were obtained from 22 dogs with different cutaneous tumors and 22 health dogs at the time of surgery and one month, three months and one year after surgery. Gelatin zymography, hematological and biochemical assessment were performed for all serum samples. The serum alkaline phosphatase activity in dogs with malignant tumors was significantly higher than that in dogs with benign tumors and control cases. Latent forms of MMP-2 and MMP-9 were detected in all of the tumor cases. Gelatin zymography showed active form of MMP-9 in 12 cases (three benign and nine malignant tumors) and active form of MMP-2 in one fibrosarcoma case. Serum activity of active-MMP-9 and total MMP-9 was significantly higher in dogs with cutaneous tumors than those in controls. Tumor cases had higher serum activity of active-MMP-9 rather than controls. MMPs and alkaline phosphatase activities in serum were decreased significantly after surgery. Only one case with perianal gland adenoma showed recurrence of tumor four months after surgery in which active form of MMP-9 had identified one month before recurrence. According to the findings, it will be useful to measure ALP, MMP-2 and MMP-9 activities in the serum of dogs with cutaneous tumor for determination of tumor behavior before surgical treatment.
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