ArticleAntioxidants (Basel, Switzerland)2026
Serum Redox Biomarkers in Canine Mast Cell Tumors: Exploratory Associations with Proliferative Activity and Clinicopathological Features.
Article in Antioxidants (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Canine mast cell tumors (MCTs) exhibit heterogeneous biological behavior and provide a clinically relevant setting in which relationships between tumor phenotype and systemic redox homeostasis can be investigated. This exploratory prospective cohort study evaluated complementary circulating redox-related biomarkers representing hydroperoxide-derived oxidant products, antioxidant capacity, lipid peroxidation-related products, and oxidative DNA damage, and examined their associations with clinicopathological features of canine MCTs. Sixty-seven dogs with cytologically and histologically confirmed cutaneous or subcutaneous MCTs were included. Clinical staging was performed using cytological evaluation of lymph nodes, liver and spleen, and excised tumors were classified according to the Patnaik and Kiupel systems. Proliferative activity was assessed using Ki-67, and surgically excised lymph nodes were classified according to the Weishaar HN system. Serum reactive oxygen metabolites (d-ROMs), malondialdehyde (MDA), 8-hydroxy-2'-deoxyguanosine (8-OHdG) and antioxidant capacity using the OXY-adsorbent test were measured before therapeutic intervention. In the unadjusted analysis, serum MDA concentrations were higher in dogs with Ki-67 >23 than in dogs with Ki-67 ≤23 (median 10.8 vs. 7.0 μmol/L; raw
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