Oxidative Stress/Angiotensinogen/Renin-Angiotensin System Axis in Patients with Diabetic Nephropathy

• Published in: International journal of molecular sciences Vol. 14; no. 11; pp. 23045 - 23062
• Main Authors: Kamiyama, Masumi, Urushihara, Maki, Morikawa, Takashi, Konishi, Yoshio, Imanishi, Masahito, Nishiyama, Akira, Kobori, Hiroyuki
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 21.11.2013; Molecular Diversity Preservation International (MDPI)
• Subjects: Adult; Aldehydes - metabolism; Angiotensinogen - genetics; Angiotensinogen - metabolism; Blood pressure; Body mass index; Diabetes; Diabetes Mellitus, Type 2 - complications; Diabetes Mellitus, Type 2 - genetics; Diabetes Mellitus, Type 2 - pathology; Diabetic Nephropathies - etiology; Diabetic Nephropathies - genetics; Diabetic Nephropathies - pathology; Diabetic nephropathy; Electronic mail systems; Endocrine system; Enzymes; Female; Gender; Glucose; Health sciences; Heme Oxygenase-1 - metabolism; Humans; Hypertension; Kidney - metabolism; Kidney - pathology; Kidneys; Male; Oxidative stress; Oxidative Stress - genetics; Reactive Oxygen Species - metabolism; Renin-Angiotensin System - genetics; Rodents; United States > US; Japan
• ISSN: 1422-0067; 1661-6596; 1422-0067
• DOI: 10.3390/ijms141123045

Although recent studies have proven that renin-angiotensin system (RAS) blockades retard the progression of diabetic nephropathy, the detailed mechanisms of their reno-protective effects on the development of diabetic nephropathy remain uncertain. In rodent models, it has been reported that reactive oxygen species (ROS) are important for intrarenal angiotensinogen (AGT) augmentation in the progression of diabetic nephropathy. However, no direct evidence is available to demonstrate that AGT expression is enhanced in the kidneys of patients with diabetes. To examine whether the expression levels of ROS- and RAS-related factors in kidneys are increased with the progression of diabetic nephropathy, biopsied samples from 8 controls and 27 patients with type 2 diabetes were used. After the biopsy, these patients were diagnosed with minor glomerular abnormality or diabetes mellitus by clinical and pathological findings. The intensities of AGT, angiotensin II (Ang II), 4-hydroxy-2-nonenal (4-HNE), and heme oxygenase-1 (HO-1) were examined by fluorescence in situ hybridization and/or immunohistochemistry. Expression levels were greater in patients with diabetes than in control subjects. Moreover, the augmented intrarenal AGT mRNA expression paralleled renal dysfunction in patients with diabetes. These data suggest the importance of the activated oxidative stress/AGT/RAS axis in the pathogenesis of diabetic nephropathy.