Plasma semicarbazide-sensitive amine oxidase activity in type 1 diabetes is related to vascular and renal function but not to glycaemia

• Published in: Diabetes & vascular disease research Vol. 11; no. 4; pp. 262 - 269
• Main Authors: Januszewski, Andrzej S, Mason, Nick, Karschimkus, Connie S, Rowley, Kevin G, Best, James D, O’Neal, David N, Jenkins, Alicia J
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.07.2014
• Subjects: Semicarbazide-sensitive amine oxidase; renal dysfunction; type 1; inflammation; diabetes; oxidative stress
• ISSN: 1479-1641; 1752-8984; 1752-8984
• DOI: 10.1177/1479164114532963

Purpose: Associations of semicarbazide-sensitive amine oxidase (SSAO) activity with renal and vascular function, oxidative stress, glycaemia and diabetes complications were determined. Methods: Plasma SSAO activity in 94 type 1 diabetes (T1DM) patients, including 34 with microvascular complications T1DM CX[+], and in 96 healthy subjects (CON) was measured by production of benzaldehyde using high-performance liquid chromatography (HPLC). Results: SSAO activity (mean ± SD) was greater in T1DM than in CON (1049 ± 294 vs 749 ± 204 mU/L; p < 0.00001) and was higher in T1DM CX[+] vs complication-free DM subjects (1148 ± 313 mU/L vs 982 ± 269 mU/L; p = 0.01). In T1DM, SSAO activity correlated with renal dysfunction [estimated glomerular filtration rate (eGFR): r = −0.44; p = 0.0001; cystatin C: r = 0.47; p = 0.0001] and markers of inflammation [soluble vascular cell adhesion molecule-1 (sVCAM-1): r = 0.41, p = 0.0001; soluble intercellular adhesion molecule-1 (sICAM-1): r = 0.33, p = 0.002] and was inversely related to small artery elasticity (SAE) (r = −0.23, p = 0.03). In CON, SSAO activity correlated with HbA1c (r = 0.26; p = 0.02). Conclusion: In T1DM, SSAO activity correlates with renal dysfunction, but not with glycaemia, and may promote vascular inflammation and be a therapeutic target.