scholarly journals Autophagy and mTOR Pathways Mediate the Potential Renoprotective Effects of Vitamin D on Diabetic Nephropathy

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Suzan A. Khodir ◽  
Rehab M. Samaka ◽  
Omnia Ameen
Keyword(s):  
Oxidative Stress ◽  
Gene Expression ◽  
Vitamin D ◽  
Diabetic Nephropathy ◽  
Creatinine Clearance ◽  
Inflammatory Cytokines ◽  
Serum Glucose ◽  
Diabetic Patients ◽  
Oxidative Stress Markers ◽  
Stress Markers

Introduction. Not only is diabetic nephropathy (DN) the most common cause of end-stage renal disease worldwide, but it also increases the risk of mortality up to fourteen times compared to normoalbuminuric diabetic patients. Aim. The aim of the current study was the evaluation of the renoprotective effects of vitamin D in DN and the possible interplay between autophagy and mTOR pathways. Materials and Methods. Fifty male Wistar albino rats were divided (10/group) into control, DN group, insulin-treated DN group, vitamin D-treated DN group, and combined insulin and vitamin D-treated DN group. Assessments of systolic blood pressure, albuminuria, creatinine clearance, serum glucose, insulin, urea, creatinine, inflammatory cytokines, oxidative stress markers, and rat kidney gene expression of mTOR were performed. Histopathological and immunohistochemical assessments of autophagy marker LC3 in rat kidneys were also performed. Results. DN was associated with significant increases in SBP, urinary albumin, serum glucose, urea, creatinine, inflammatory cytokines, MDA, and mTOR gene expression (P<0.05). However, there was significant decrease in creatinine clearance, serum insulin, GSH, and H score value of LC3 when compared with control group (P<0.05). The combination of insulin and vitamin D treatment significantly restored DN changes when compared with the other treated groups, except in oxidative stress markers where there was an insignificant difference between the combination-treated and insulin-treated groups (P>0.05). Conclusion. It has been concluded that vitamin D is a potent adjuvant therapy in treatment of DN via downregulation of mTOR gene expression, stimulation of autophagy, and antioxidant, anti-inflammatory, and hypotensive effects.

scholarly journals The Significance of Urinary Markers in the Evaluation of Diabetic Nephropathy

2008 ◽  
Vol 27 (3) ◽  
pp. 376-382 ◽  
Author(s):  
Tatjana Cvetković ◽  
Predrag Vlahović ◽  
Vidosava đorđević ◽  
Lilika Zvezdanović ◽  
Dušica Pavlović ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Diabetic Nephropathy ◽  
Urine Concentration ◽  
Control Group ◽  
Diabetic Patients ◽  
Type 2 Diabetic Patients ◽  
Urinary Markers ◽  
Stress Markers

The Significance of Urinary Markers in the Evaluation of Diabetic Nephropathy Oxidative stress is considered to be a unifying link between diabetes mellitus (DM) and its complications, including nephropathy (DN). The aim of this study was to determine the parameters of oxidative injury of lipids and proteins as well as the activity of ectoenzymes in the urine of DN patients. The study included 40 individuals: 10 patients with type 2 diabetes mellitus and microalbuminuria (DMT2-MIA), 10 type 2 diabetic patients with macroalbuminuria (DMT2-MAA), 10 patients with type 1 diabetes and microalbuminuria (DMT1-MIA) and 10 age- and sex-matched healthy subjects (control). In the urine we determined TBA reactive substances (TBARS), reactive carbonyl groups (RCG), and the activity of ectoenzymes N-acetyl-β-d-glucosaminidase (NAG), plasma cell differentiation antigen (PC-1), aminopeptidase N (APN) and dipeptidyl peptidase IV (DPP IV). A higher concentration of TBARS in the urine was found in DMT2-MIA and DMT1-MIA, compared to the control group (p<0.001 and P<0.05). The urine concentration of RCD shows similar results with a significant elevation in the groups with DMT2-MAA and DMT1-MIA, compared to the DMT2-MIA (p<0.001) and control group (p<0.001). Activities of NAG, APN and DPPIV were significantly higher in the urine of DMT2-MAA, compared to the control (p<0.01). The activity of PC-1 was slightly increased in that group, but not significantly. In conclusion, the level of oxidative stress markers and activities of brush border ectoenzymes in the urine may be a useful non-invasive and easily repeatable test in DN.

scholarly journals COMPARATIVE STUDY OF LEVELS OF SELECTIVE OXIDATIVE STRESS MARKERS (MALONDIALDEHYDE, ZINC, AND ANTIOXIDANT VITAMINS A, E, AND C) IN ISCHEMIC AND NON-ISCHEMIC HEART DISEASE PATIENTS SUFFERING FROM TYPE- 2 DIABETES

2018 ◽  
Vol 11 (8) ◽  
pp. 508
Author(s):  
Abd Elgadir A Altoum ◽  
Ahmed L Osman ◽  
Asaad Ma Babker
Keyword(s):  
Oxidative Stress ◽  
Heart Disease ◽  
Vitamin A ◽  
Ischemic Heart Disease ◽  
Serum Vitamin ◽  
Antioxidant Vitamins ◽  
Ischemic Heart ◽  
Diabetic Patients ◽  
Oxidative Stress Markers ◽  
Stress Markers

Objective: The objective of the current study is to compare the levels of oxidative stress markers malondialdehyde (MDA), zinc, and antioxidant Vitamins (A, E, and C) in ischemic heart disease (IHD) and non-IHD patients with diabetes mellitus.Method: This is cross-sectional study group, conducted in the advanced diagnostic center (Khartoum- Sudan) from the period May 2013 to August 2015. Comprised 100 healthy subjects were, control group with mean (fasting blood sugar) 5.61=m mol/L, the age ranged from 22 to 78 years old, the average of the age was 50.1 years. 300 patients (78 IHD and 222 without) as cases groups, the ages ranged from 30 to 80 years. The age average was 51.2 years, all samples were in a state of fasting for 12 h, and the data were collected using a structured questionnaire and direct interview to collect information. Blood specimens were collected from both groups, and plasma levels of MDA, zinc, and antioxidant Vitamins (A, E, and C) were determined.Results: There was a significant difference between the level of serum Vitamin A, E, and MDA in diabetic patients with IHD and those diabetic without IHD (p<0.05). No significant differences in serum Vitamin C level between both groups (p>0.05).Conclusion: Due to the significant differences in serum Vitamin A, E, Zinc, and MDA between diabetics with IHD and diabetics without IHD, these parameters can be used as prognostic markers for prediction of oxidative stress and antioxidant stress of diabetic patients with IHD complications.

scholarly journals Angiotensin II Type 1 Receptor Blockers Reduce Urinary Oxidative Stress Markers in Hypertensive Diabetic Nephropathy

Hypertension ◽  
2006 ◽  
Vol 47 (4) ◽  
pp. 699-705 ◽  
Author(s):  
Susumu Ogawa ◽  
Takefumi Mori ◽  
Kazuhiro Nako ◽  
Taro Kato ◽  
Kazuhisa Takeuchi ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Diabetic Nephropathy ◽  
Angiotensin Ii ◽  
Oxidative Stress Markers ◽  
Stress Markers ◽  
Receptor Blockers
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