Showing 6 results for Albumin
Manouchehr Nakhjavani, Farid Azmoudeh-Ardalan, Arman Mazouji,
Volume 1, Issue 2 (7-2002)
Abstract
Introduction: The urinary excretion of minimal quantities of albumin (microalbuminuria) is predictive of renal failure and cardiovascular mortality. The detection and prompt treatment of microalbuminuria is crucial to the prevention and progress of renal failure in patients with diabetes. The aim of this study is to evaluate the relative frequency of microalbuminuria in different age groups of men and women attending the diabetes clinic at Imam Khomeini University Hospital.
Methods: 123 patients each provided a 12-hour urine sample, collected in standard fashion. Urinary albumin was measured by immunoturbidometry. The frequency of microalbuminuria (urinary albumin excretion between 30mg and 300mg in a 24-hour sample) was assessed in different age groups in men and women, according to duration of diabetes, glomerular filtration rate (GFR), glycosylated haemoglobin levels (A1C), body mass index (BMI), and both systolic and diastolic blood pressure.
Results: Overall, 20.3% of patients had microalbuminuria, 61.1% normoalbuminuria, and 10.6% macroalbuminuria. Patients with microalbuminuria were significantly older (mean age = 58.5 years) than patients with normal albumin excretion (50.3 years). The male-to-female ratio was highest in patients with microalbuminuria and lowest in those with normoalbuminuria. There was no significant difference in GFR, A1C, and blood pressure between patients with normo-, micro-, or microalbuminuria. There was a significant difference in duration of diabetes between normoalbuminuric (9.3 years) and microalbuminuric patients (11.5 years). There was a significant, inverse correlation between BMI and urinary albumin excretion.
Conclusions: Renal function in patients with type 2 diabetes deteriorates with increasing age and duration of diabetes. Renal impairment is more common in men than women.
Mohammad Afkhami Ardakani, Mojgan Modarresi, Elham Amirchaghmaghi,
Volume 3, Issue 1 (5-2004)
Abstract
Diabetes is one of the most common metabolic diseases. The prevalence of diabetes, which is around 4.5 - 6% in Iran, reaches as high as 14.2% in population of age 30 years and over in Yazd. Microalbuminuria is diagnosable before development of nephropathy and could be detected at an early stage when effective therapy can still be carried out. In this stage near normalization of blood glucose, strict blood pressure control and administration of ACE inhibitors can prevent nephropathic complications.
This study was aimed to determine the correlation among microalbuminuria, age, duration of diabetes, body mass Index, serum triglyceride, serum cholesterol and blood pressure in type 2 diabetic inhabitants of Yazd diabetes research center.
Methods: This cross-sectional study was carried out during November 2002-July 2003 to investigate the correlation between microalbuminuria and assumed risk factors. Two hundred and eighty eight type 2 diabetic patients (141 males and 147 females) were selected through consecutive sampling. Results: Overall prevalence of microalbuminuria was 14.2%. Chi-square analysis revealed the association between microalbuminuria and high diastolic blood pressure (P-value=0.003) and duration of diabetes (P-value = 0.001). No statistically significant correlation was found between microalbuminuria and body mass index, serum triglyceride, serum cholesterol and systolic blood pressure.
Conclusion: Determination of urine albumin/creatinin ratio is an easy method for screening microalbuminuria which is recommended for all diabetics especially those with hypertension and a long term history of diabetes.
Hassan Safaei, Masoud Amini,
Volume 5, Issue 4 (6-2006)
Abstract
Background: Microalbuminuria represents the earliest clinical of renal involvement and reflects the progression of diabetic nephropathy and increased risk of mortality in diabetic patients. The incidence of diabetic nephropathy in type 2 diabetes differs widely by race .The aim of this study was to determine the incidence of and risk factors for microalbuminuria in type 2 diabetic patients.
Methods: As a cohort study 505 (22%male, mean age: 57.4±9.5 years and diabetes duration 10.2±4.7 years at initial registration) type 2 diabetic patients with initial normoalbuminuria were followed prospectively for 5 years in isfahan endocrine and metabolism research center. Patients were evaluated for BMI ,HbA1c, blood pressure, lipid profile, serum creatinine and 24 hours urine albumin. Normoalbuminuria were defined as urine albumin excretion less than or equal to 30 mg/24 h and microalbuminuria as 31-299 mg/24 h. Logistic regression model were used to assess the associations.
Results:176 revealed persistently elevated UAE during follow-up, giving an incidence of 82.3/1000 person-years(95%CI:78/3-86/2). Incidence of microalbuminuria were significantly higher in men than wemen(104.4 and 66.2/1000 person-year, P<0.001).The mean values of HbA1c, duration of diabetes, systolic hypertension and serum creatinin during the follow-up period were significantly higher in the microalbuminuric than in the normoalbuminuric patients. Age, BMI, cholesterol and triglyceride were not significantly different in two groups. Logistic regression analysis revealed that duration of diabetes, HbA1c, high blood pressure and retinopathy during follow-up are independent variables that have a statistically significant influence on the development of microalbuminuria.
Conclusion: These result revealed that microalbuminura in this population of type 2 diabetic patients were common and higher than of other studies. These findings suggest that urine excretion of albumin should be monitored routinely in this patients for detection early stages of nephropathy and effective treatment of microalbuminura and associated risk factors are very important.
Fatemeh Mohammadzadeh, Kobra Omidfar, Ramin Heshmat, Mazaher Rahmani, Bagher Larijani,
Volume 6, Issue 3 (5-2007)
Abstract
Background: Microalbominuria (MA) is early presentation of renal damage which acts as an independent factor of cardiovascular events in these patients. There are various methods for sampling and also different laboratory tests to measuring albominuria. The aim of this study was to compare of different urine collection methods for measuring albominuria using immunoturbidometry assay which has acceptable accuracy and sensitivity after HPLC (High Performance Lipid Chromathography).
Methods: Forty seven diabetic patients were selected for a cross-sectional study in 2006. For all patients 24-h urine sample were collected, also an overnight urine sample (8 hour long) and spot urine sample (morning time) was provided in the next day. The level of albumin in all samples were measured via immunoturbidometry assay. Then the results of agreement coefficient were accounted and comprised with each others.
Results: In this study 47 patients were selected which 46 of them were type 2 and one of them type 1 diabetic. Our results revealed significant correlation between all methods. In addition agreement coefficient (kappa) was accounted for all methods, time 24-h urine in comparison with 8 hours overnight urine, timed 24-h urine in comparison with spot urine and overnight urine samples in comparison with spot urine which were 0.876, 0.936 and 0.807 respectively.
Conclusion: Regarding significant agreement for screening of microalbominuria between different collecting methods, we suggest 8-h overnight or spot urine sampling carry out instead of 24-h urine collection.
Naghmeh Sattarahmady, Ali A. Moosavi-Movahedi,
Volume 7, Issue 1 (7-2007)
Abstract
The interaction of reducing carbohydrates with proteins leads to a cascade of reactions that are known as glycation or Maillard reaction that have important roles in diabetic complications. In this minireview, structural changes of glycated human serum albumin (GHSA) via various sugars in different incubation times, which reported in scientific literature as well as our research, were reported. Our studies showed glycation induced structural changes for Human Serum Albumin (HSA). In glycation process of HSA after 21 days incubation, glucose separates from HSA and induced the formation of molten globule state that is relative to several diseases that originate from molten globule state in proteins. Also, glycation of HSA induced aggregation states and amyloid formation as well as decreased surface tension which plays a role of denaturant for protein as a surfactant. In following, we showed that alginate as a sugar polymer decreased glycation reaction in HSA. Finally, it is compared the structural changes of artificial and in vitro interaction of sugars with HSA as well as diabetic patients HSA. The results show the number of arginine residues in HSA of diabetic patients is more modified relative to lab samples.
Zahra Mirzaeezadeh, Hajar Zarei, Kobra Omidfar,
Volume 13, Issue 3 (3-2014)
Abstract
Background: In this study, using anti-human serum albumin (HSA)-conjugated gold nanoparticles
(AuNPs) as an electrochemical label and mobile crystalline material-41 (MCM-41)–polyvinyl alcohol
(PVA) mesoporous nanocomposite as an immobilization platform, a new immunosensor was
established.
Methods: Field emission scanning electron microscopy (FESEM), cyclic voltammetry (CV), and
differential pulse voltammetry (DPV) have been applied to determine the physicochemical and
electrochemical properties of this hybrid film in immunosensor development.
Results: A suitable attachment between HSA and MCM-41 and also a thick layer deposition of
MCM-41–HSA–PVA film onto the electrode surfaces was observed by FESEM. DPV was employed
for quantitative determination of antigen.
Conclusion: In optimal conditions, this immunosensor could detect HSA in a high linear range (0.5–
200 µg ml
-1
with a low detection limit of 1 ng ml
-1
. This new strategy showed acceptable
reproducibility, stability, and reliability and could also be applied to detect the other antigens.
