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Query: UMLS:C0011849 (diabetes)
 277,896 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

These studies examine the effect of cholesterol feeding in normal rats and in rats with streptozotocin-induced diabetes mellitus. Four groups were studied: normal rats fed either a standard rat chow or a standard rat chow supplemented with cholesterol and diabetic rats fed standard chow or standard chow plus cholesterol. Diabetic rats fed a standard diet excreted more creatinine and urea in the urine, had higher levels of blood urea nitrogen, and lower serum albumin levels than rats fed standard diet plus cholesterol. Blood glucose levels were similar in the two groups; however, diabetic rats given cholesterol had a greater body weight at the end of the study than diabetic rats eating standard chow. Urine volumes and sodium and potassium excretion in the urine were greater in diabetic rats fed a standard diet than in those fed a high cholesterol diet. Diabetic rats fed a standard diet had distinctive renal lesions characterized by swelling of tubular epithelial cells with clearing of cytoplasm. The nephron segments involved by this striking vacuolar change were the distal convoluted tubule and the thick limbs of Henle's loop. These lesions were identical to those described by Armanni-Ebstein in severely glycosuric patients. These lesions were not observed in any of the animals of the other three groups (including diabetic rats fed a high cholesterol diet). Glomeruli were normal in animals of all groups. Thus, cholesterol administration prevents the development of the Armanni-Ebstein lesions in diabetic rats despite persistent hyperglycemia. The mechanism by which cholesterol administration prevents the accumulation of glycogen in distal tubule cells has not been elucidated. It is suggested that glycogen accumulation in distal tubular segments may explain the greater urine volumes, natriuresis, kaliuresis, and proteinuria observed in diabetic animals fed a standard diet when compared with rats fed the same diet plus cholesterol.
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PMID:A high cholesterol diet ameliorates renal tubular lesions in diabetic rats. 235 86

Circulating liver membrane antibodies (LMAb) were examined in 71 patients with non-insulin-dependent diabetes mellitus (NIDDM) without liver dysfunction and 16 cases of KK mouse as a model of obese diabetic animals. LMAb were detected in 10 NIDDM patients (14.1%). Fasting blood glucose, glycosylated serum albumin (G-Alb), and glycosylated hemoglobin A1 (HbA1) levels were compared with LMAb-positive and negative groups. The G-Alb levels and HbA1 levels of the LMAb-positive group were significantly higher (p less than 0.05 and p less than 0.01, respectively) than those of the LMAb-negative group. In addition, there were no differences in histological findings in KK mouse liver between the LMAb-positive and negative cases. These results revealed that the state of continued high blood glucose directly or indirectly influence the autoimmunity and clinical features of NIDDM patients.
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PMID:Detection of liver membrane antibodies in patients with non-insulin-dependent diabetes mellitus. 235 76

Camostat mesilate is a developed derivative of gabexate mesilate for oral administration and is known to be one of the most potent protease inhibitors. We administered this drug to 15 patients with advanced diabetic nephropathy at a daily dose of 600 mg for 4 to 6 weeks. All patients had been treated with conventional therapy including angiotensin-converting enzyme inhibitors, and their diseases had stabilized for at least 2 weeks before the camostat mesilate therapy. Urinary protein excretion decreased promptly from 4.8 +/- 0.6 to 2.9 +/- 0.4 gm/day (mean +/- SEM, p less than 0.01) and serum albumin level increased from 2.7 +/- 0.2 gm/dl to 2.9 +/- 0.2 gm/dl (mean +/- SEM, p less than 0.05) within 4 to 6 weeks. The amount of plasma fibrinogen significantly decreased from 419.7 +/- 42.3 mg/dl to 306.6 +/- 28.3 mg/dl (mean +/- SEM, p less than 0.01), and urinary total fibrinogen degradation product excretion over 24 hours also decreased from 26,118 +/- 9,696 to 18,072 +/- 7,107 micrograms/day (mean +/- SEM, p less than 0.05). The value for serum creatinine level did not change during this intervention. We suggest that camostat mesilate suppresses the hypercoagulable state originating from diabetes mellitus, and changes the permselectivity of the glomerular capillary wall. These effects of camostat mesilate may improve the prognosis of diabetic nephropathy.
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PMID:Effect of camostat mesilate for the treatment of advanced diabetic nephropathy. 239 38

Young adult rats were immunized with either in vitro glucosylated or unmodified rat serum albumin (RSA) followed by induction of the diabetic state. At various times after streptozotocin administration, sera were evaluated for specific antibody response using the enzyme-linked immunosorbent assay while urine was monitored for the presence of albumin by radial immunodiffusion. The data indicate that glucosylated RSA is capable of eliciting the production of antibodies, but unmodified RSA is not. The specificity of the generated antibodies appears to be directed toward the glucitol-lysine residues of the modified albumin. Preimmunization of rats with glucosylated RSA followed by induction of diabetes causes a rapid decline in specific antibody titers and greatly enhances the rate of progression to albuminuria. These results demonstrate that in vitro and in vivo glucosylation of an endogenous protein provide products with identical antigenicity. They also suggest an animal model for the study of diabetic autoimmunity involving glucosylated endogenous proteins.
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PMID:Accelerated onset of albuminuria in diabetic rats preimmunized with glucosylated rat serum albumin. 241 26

The distribution of total serum zinc between serum albumin and alpha 2-macroglobulin was evaluated by ultracentrifugation in patients with cirrhosis of the liver, insulin-dependent diabetes mellitus, or chronic renal failure. We found that the alpha 2-macroglobulin bound zinc fraction amounts to approximately 6 and 5% of the total serum zinc in patients with cirrhosis of the liver and diabetes mellitus, which corresponds to the distribution in controls. In patients with chronic renal failure, however, the alpha 2-macroglobulin-bound zinc fraction only constitutes approximately 2%, which is significantly less than in controls. Our findings indicate that most of the total serum zinc is bound to serum albumin.
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PMID:Distribution of serum zinc between albumin and alpha 2-macroglobulin in patients with different zinc metabolic disorders. 241 56

In order to study the in vivo clearance of model immune complexes, radiolabelled aggregated rat gamma globulin (ARG), aggregated human serum albumin (AHSA) and 59Fe-tagged erythrocytes were intravenously injected into control, and insulin-deficient and insulin-treated rats with streptozotocin-induced diabetes. Plasma clearance and organ uptake were measured. The rate of plasma clearance of ARG was studied at trace (18 micrograms) and near-saturating (10 mg) doses. AHSA was cleared slowly from the circulation, and there were no observed differences between the study groups. At trace doses of ARG, plasma clearance was similar in the three animal groups; however, at the higher dose, clearance was significantly slowed in both insulin-deficient and insulin-treated diabetic rats as compared to control animals (P less than 0.01). Organ uptake of AHSA was similar in all study groups. Hepatic uptake at 10 min after injection of ARG was comparable in control and insulin-deficient rats; however, the rate of removal from the liver was significantly slowed in these diabetic rats. Insulin-treated diabetic rats had less hepatic-associated ARG, as compared to the other animals, throughout the study. Splenic uptake of ARG was comparable in both control and insulin-treated animals, but was significantly less in insulin-deficient diabetic animals. These alterations in plasma clearance and tissue localization of ARG in diabetic animals suggest that abnormal phagocytosis may contribute to the elevated levels of circulating immune complexes that have been demonstrated in diabetic subjects.
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PMID:Alterations in plasma clearance and tissue localization of model immune complexes in rats with streptozotocin-induced diabetes. 243 17

Serum viscosity's increase in diabetes has been linked to the presence of microvascular sequelae and to changes in serum protein composition. The major change is a decline in albumin and an increase in the levels of acute-phase proteins. In this study, albumin and five acute phase proteins--alpha-1 acid glycoprotein, alpha-1 antitrypsin, haptoglobin, ceruloplasmin, and C-reactive protein--were measured. Levels in adult diabetes (principally type II) were compared with those in both subjects with glucose intolerance and control subjects (healthy subjects and nondiabetic ambulatory patients). Haptoglobin, alpha-1 acid glycoprotein, and C-reactive protein increased markedly in both diabetes and glucose intolerance; ceruloplasmin and alpha-1 antitrypsin increased more marginally. Serum albumin level decreased more strikingly as hyperglycemia advanced. Acute-phase proteins also increased in advanced glucose intolerance as in established diabetes. The acute-phase protein elevation did not differ with degree of control or duration of diabetes. When diabetics were divided into those with and without clinically detectable evidence of microvascular sequelae, elevation of haptoglobin, C-reactive protein and alpha-1 acid glycoprotein, and depression of albumin were found to progress with number of sequelae. The levels of these proteins, particularly haptoglobin, were also highly correlated with serum viscosity expressed as viscosity number. Mild serum albumin depression and a more striking acute-phase protein elevation are greater in diabetes with microangiopathy, develop in glucose intolerance, and contribute substantially to elevated plasma viscosity in diabetes.
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PMID:Increased levels of acute-phase serum proteins in diabetes. 247 61

Mortality and hospitalization rates for pneumonia have increased among older Americans during recent years (1979-86), despite a national commitment to the reduction of premature deaths from pneumonia. A prospective study of deaths and hospitalizations attributable to pneumonia was conducted among 5,474 subjects ages 55 and older who participated in the NHANES I Epidemiologic Followup Study. Prevalent chronic conditions, health behaviors, and nutritional status indicators, measured at baseline, were examined in relation to pneumonia hospitalization and death during 12 years of followup. Mortality and hospitalization rates for pneumonia were higher among men than women, and higher among those ages 65 and older than among those 55-64 of both sexes. Risk of pneumonia death was higher among subjects with a history of congestive heart failure, stroke, cancer, or diabetes. Risk of pneumonia hospitalization was higher among subjects with a history of chronic obstructive pulmonary disease and among men who were current smokers. Daily alcohol consumption did not increase risk of pneumonia in this study population. Four measures of nutritional status were examined taking age, prevalent chronic conditions, and cigarette smoking into account: body mass index, arm muscle area, and serum albumin and hemoglobin levels. Risk of pneumonia death was 2.6 times higher in men in the lowest quartile, compared with men in the highest quartile, of body mass index. Similarly, the risk was 4.5 times higher among men in the lowest quartile of arm muscle area. Risk of death from pneumonia was 3.6 times higher among women in the lowest quartile of serum albumin levels compared with women in the highest quartile. Relative risks for these nutritional status indicators remained elevated after adjusting for age and the medical history risk factors. These risk factors should be taken into account when designing and evaluating pneumonia vaccination trials and community prevention programs.
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PMID:Prospective study of pneumonia hospitalizations and mortality of U.S. older people: the role of chronic conditions, health behaviors, and nutritional status. 250 6

This study investigated hemodynamic changes in diabetic rats and their relationship to changes in vascular albumin permeation and increased metabolism of glucose to sorbitol. The effects of 6 wk of streptozocin-induced diabetes and three structurally different inhibitors of aldose reductase were examined on 1) regional blood flow (assessed with 15-microns 85Sr-labeled microspheres) and vascular permeation by 125I-labeled bovine serum albumin (BSA) and 2) glomerular filtration rate (assessed by plasma clearance of 57Co-labeled EDTA) and urinary albumin excretion (determined by radial immunodiffusion assay). In diabetic rats, blood flow was significantly increased in ocular tissues (anterior uvea, posterior uvea, retina, and optic nerve), sciatic nerve, kidney, new granulation tissue, cecum, and brain. 125I-BSA permeation was increased in all of these tissues except brain. Glomerular filtration rate and 24-h urinary albumin excretion were increased 2- and 29-fold, respectively, in diabetic rats. All three aldose reductase inhibitors completely prevented or markedly reduced these hemodynamic and vascular filtration changes and increases in tissue sorbitol levels in the anterior uvea, posterior uvea, retina, sciatic nerve, and granulation tissue. These observations indicate that early diabetes-induced hemodynamic changes and increased vascular albumin permeation and urinary albumin excretion are aldose reductase-linked phenomena. Discordant effects of aldose reductase inhibitors on blood flow and vascular albumin permeation in some tissues suggest that increased vascular albumin permeation is not entirely attributable to hemodynamic changes. We hypothesize that 1) increases in blood flow may reflect impaired contractile function of smooth muscle cells in resistance arterioles and 2) increases in vascular 125I-BSA permeation and urinary albumin excretion reflect impaired vascular barrier functional integrity in addition to increased hydraulic conductance secondary to microvascular hypertension associated with decreased vascular resistance.
Diabetes 1989 Oct
PMID:Prevention of hemodynamic and vascular albumin filtration changes in diabetic rats by aldose reductase inhibitors. 250 78

A radioimmunoassay for glycated serum protein (GSP) was developed using monoclonal antibody to glucitollysine and polystyrene beads coated with Coomassie-Brilliant-Blue (CBB) as adsorbent for serum protein. The monoclonal antibody was raised by immunizing BALB/c mice with reduced glycated LDL and fusing their spleen cells with mouse myeloma cells. CBB-coated polystyrene beads were introduced to absorb a constant amount of serum protein. The protein adsorbed on the CBB-coated beads was reduced by NaHB4, and after treatment with radiolabeled antibody, the radioactivity of each bead was counted with an automatic gamma-counter. The standard glycated protein used was reduced glycated human serum albumin, in which 8 of 59 lysine residues were glycated. The intra- and interassay coefficients of variation of GSP were 4.8-6.5% and 1.6-6.0%, respectively. The GSP level of diabetic patients was significantly higher than that of normal controls (1.97 +/- 1.23 vs. 0.47 +/- 0.21 nmol/mg-protein; mean +/- SD, p less than 0.001). The GSP levels of patients with insulin-dependent and non-insulin-dependent diabetes mellitus were 3.03 +/- 1.05 and 1.51 +/- 1.00 nmol/mg-protein, respectively. A good correlation was found between the levels of GSP and hemoglobin A1c (HbA1c) (r = 0.85, p less than 0.001). In patients admitted to the hospital for diabetes education and glycemic control, the GSP level decreased 43 +/- 12% with the decrease in the fasting plasma glucose level (39 +/- 13%) and the mean daily plasma glucose level (MPG, 47 +/- 15%) in a four week period after admission, whereas the HbA1c level decreased only 13 +/- 6% during this period.(ABSTRACT TRUNCATED AT 250 WORDS)
Diabetes Res 1989 May
PMID:Radioimmunoassay of glycated serum protein using monoclonal antibody to glucitollysine and coomassie-brilliant-blue-coated polystyrene beads. 251 33


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