Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0011849 (diabetes)
 277,896 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

To find a simple and accurate test of autonomic nervous dysfunction in diabetes mellitus, 41 insulin-dependent diabetics and 25 controls were investigated. The diabetics, none of whom had symptoms of autonomic dysfunction, were tested for retinopathy and sensory neuropathy. Each subject also performed maximal deep-breathing procedures while undergoing electrocardiographic recording: in normal subjects the intervals are shortened during inspiration and prolonged during expiration, and a difference in the heart rate between inspiration and expiration of 10% or less seems to indicate autonomic dysfunction. This difference was calculated as an E:I ratio of the mean of the longest R-R interval during maximal expiration to the mean of the shortest during maximal inspiration. Ten of the 18 patients found to have sensory neuropathy had abnormal E:I ratios, and among those with absent ankle reflexes the proportion was even higher (9 out of 11). The E:I ratio also seemed to be as accurate as traditional tests for autonomic dysfunction and easier to perform. Diabetics with autonomic dysfunction have an increased risk of acute cardiorespiratory death during and after surgery, and maximal deep breathing and calculation of the E:I ratio may be a useful test to perform on diabetics at risk.
 ...
PMID:Respiratory influence on heart rate in diabetes mellitus. 43 83

The association between an objective measure of diabetic retinopathy and skeletal muscle capillary basal lamina thickness was examined in a group of 30 male insulin-treated diabetic subjects, mean age (+/- SD) 44.6 +/- 13.2 yr, duration of diabetes 21.2 +/- 11.2 yr, % ideal body weight (% IBW) 106 +/- 11%. In addition, muscle capillary basal lamina width was measured in a group of 18 nondiabeitc men, mean age 40.7 +/- 16.3 yr and % IBW 118 +/- 23%. The muscle capillary width of the diabetic subjects was significantly greater than that of the nondiabetic group (P less than 0.01), but the values of the two overlapped considerably. In the diabetic group, there was a significant association of basal lamina width with age (P less than 0.01) but not with duration of diabetes. The association between extent of retinopathy and muscle capillary basal lamina width was not strong. The findings of the study do not therefore support the use of an estimate of muscle capillary basal lamina thickness as a single representative measure of diabetic microangiopathy.
Diabetes 1979 Sep
PMID:The association between diabetic retinopathy and skeletal muscle capillary basal lamina thickening corrected for the influence of age and duration of diabetes. 46 12

ADP-induced platelet aggregation was investigated in patients with diabetes mellitus at various stages of the development of retinopathy. Two parameters were used to evaluate the aggregation activity of platelets: the degree of aggregation and the dysaggregation percentage. There was revealed a direct correlation between the platelet hyperaggregation and the degree of diabetic retinopathy. A sharp elevation of the degree of aggregation and low dysaggregation percentage (up to its complete absence) were noted in patients with proliferating retinopathy; this could be supposed to be due to the supervention of the activating action of the altered vascular wall on the platelet aggregation. No reduction of platelet hyperaggregation under the effect of a brief treatment with such drugs as prodectin and dicion was revealed.
 ...
PMID:[Platelet aggregation in diabetes mellitus at various stages of development of retinopathy]. 47 73

N-Acetyl-beta-D-glucosaminidase (NAG) activity has been measured in the serum and urine of primary and secondary diabetics and in primary diabetics with microangiopathy. NAG activity has also been measured in the tears of diabetics with ocular complications and diabetics with no ocular changes. Results have shown significantly higher levels of urinary NAG in diabetics with proteinuria (p less than 0.001) and proteinuria and retinopathy (p less than 0.001). There was no correlation between urinary NAG activity and serum creatinine (r = 0.28) or urinary NAG and the degree of proteinuria (r = 0.24). Increased urinary NAG levels were also observed in secondary diabetes associated with haemochromatosis and acromegaly. Significantly higher serum NAG levels were found in newly diagnosed diabetics (p less than 0.01) and significantly lower levels in chemical diabetics (p less than 0.01). Compared to non-diabetic controls tear NAG levels were significantly higher in the diabetic controls (p less than 0.01), in diabetics with retinopathy (p less than 0.01), and in diabetics with cataract formation (p less than 0.05). An assessment of this enzyme is made in relation to the development of diabetic microangiopathy.
 ...
PMID:N-Acetyl-beta-D-glucosaminidase levels and diabetic microangiopathy. 48 3

The study was designed to show whether there was any relation between muscle capillary basement membrane thickness, HLA-antigens, anti-insulin antibodies and proliferative retinopathy. Electron microscopic measurements of muscle capillary basement membrane thickness were performed on muscle biopsies from 15 insulin-dependent diabetics and severe proliferative retinopathy, 24 insulin-dependent diabetics with minimal retinopathy and 18 age- and sex matched non-diabetics. All the patients had had diabetes for 20 years or more. None had biochemical or clinical evidence of diabetic nephropathy. Basement membrane thickness was measured according to the methods of Siperstein and Williamson. Muscle capillary basement membrane thickening occurred in 32 of 39 diabetics, using the Siperstein method, but patients with proliferative retinopathy did not exhibit thicker basement membranes than patients with no or minimal changes in the retina. There were apparent differences in HLA-antigens between diabetics with and without proliferative retinopathy, but they did not reach statistical significance. There was no correlation between muscle capillary basement membrane thickness and the quantity of insulin antibodies. The results indicate that factors other than basement membrane thickening and genetic factors in the HLA-region, are responsible for the development of proliferative retinopathy.
 ...
PMID:Basement membrane thickness, insulin antibodies and HLA-antigens in long standing insulin dependent diabetics with and without severe retinopathy. 48 71

The flow properties of blood are abnormal in diabetes. The red cell deformability (RCD) is reduced and depends on the metabolic state, the red cell aggregation (RCA) and plasma viscosity are increased independent of the metabolism. 157 diabetics were studied according the following nosological factors: duration of diabetes, type of therapy, ophthalmoscopic status, metabolic state and general health status. Although a deterioration of the flow properties of blood can be observed in long-term diabetics, in patients receiving antidiabetic drugs or insulin and in cases of pronounced retinopathy, these changes can all be attributed to a higher incidence of insufficiently controlled metabolism and the presence of subsequent diseases. There is some evidence that the rheological changes cannot be neglected considering the development and progression of diabetic microangiopathy.
 ...
PMID:Hemorrheological abnormalities in different states of diabetic retinopathy. Effect of metabolic control and subsequent diseases. 49 81

Plasma fibrinogen was measured in 285 diabetics (age range 15-85 years) and 209 controls (age range 23-74 years). Plasma fibrinogen concentration showed a positive skew distribution and an approximate normal distribution was obtained by log transformation. The mean log plasma fibrinogen in the diabetics was significantly increased (p less than 0.0001). Patients treated with a sulphonylurea (n = 81) had the highest mean log plasma fibrinogen concentration and this was significantly higher than in patients treated with insulin (n = 76; p less than 0.01), biguanides (n = 28; p less than 0.01) or sulphonyluera plus biguanides (n = 38; p less than 0.05). The biganide treated group had the lowest mean log plasma fibrinogen concentrations. No correlation was found between plasma fibrinogen and blood glucose, duration of diabetes or the presence of complications. Subjects with proliferative retinopathy (n = 38) had a similar mean plasma fibrinogen to those with background retinopathy (n = 55). Twenty-two maturity onset diabetics treated with a sulphonylurea and followed prospectively showed a significant increase in plasma fibrinogen after five months (p less than 0.0001), while a control diet treated group showed no alteration in plasma fibrinogen. It is concluded that plasma fibrinogen is significantly increased in diabetics and apart from age, the main factor related to the increase is treatment with sulphonylureas. It remains speculative whether this association has any correlation with long term cardiovascular morbidity.
 ...
PMID:Plasma fibrinogen in diabetes mellitus. 49 35

To study the possible role of an "increased thrombotic tendency" in the vascular complications of diabetes several tests of haemostatic function were carried out on 91 men and 63 women with diabetes aged 35-54 years and the results compared with findings in 686 men and 393 women of the same age in the Northwick Park Heart Study. Mean values for factors VII and X, fibrinogen, and platelet adhesiveness were higher in the diabetics, but mean fibrinolytic activity and whole blood platelet counts were lower. Antithrombin III values were also higher in the diabetics, which may have constituted a protective response to other changes favouring the onset of vascular disease. Diabetics with retinopathy had higher factor VII and antithrombin III values, and those with proteinuria had higher values for factor VII, fibrinogen, and platelet adhesiveness than those without these complications. These findings suggest a potentially important association between a thrombogenic tendency and vascular disease in diabetes. Nevertheless, prospective data are needed to clarify whether the haemostatic abnormalities precede the onset of clinically manifest vascular complications or are a consequence of them.
 ...
PMID:Haemostatic variables associated with diabetes and its complications. 50 77

Consideration given to the literature data about the diabetogenic effect of prolactin, the basal prolactin secretion was investigated in 98 patients with diabetes mellitus. A significantly increased basal prolactin level was established. The influence of age, sex, disease duration, type of diabetes, blood sugar level, mode of treatment and vascular complications upon prolactinemia was studied. Significantly higher prolactinemia was found in insulin treated patients and insignificantly -- in diabetics with retinopathy. The correlation of prolactinemia with glycemia, insulinemia and lipacidemia is low. That provides gounds to admit that hyperprolactinemia plays no essential role as an additional diabetogenic factor in the patients with diabetes mellitus. The causal relationship between hyperprolactinemia and diabetes still remains not well elucidated.
 ...
PMID:[Basal prolactin secretion in diabetes mellitus]. 51 54

The levels of the minor hemoglobin A1 components were measured in a consecutive series of 102 diabetic patients who were extensively studied for signs of diabetic retinopathy. We found a statistically significant relationship between metabolic control, as reflected by the hemoglobin A1 level, and the severity of diabetic retinopathy in patients with diabetes diagnosed before 30 years of age (P less than or equal to .001). We did not demonstrate a significant correlation between metabolic control and the severity of retinopathy in patients with diabetes diagnosed after the age of 30 years. We found significantly more severe retinopathy among patients with longer duration of the disease, in men, in whites, in diabetics diagnosted before 30 years of age who were treated with lower insulin doses, and in obses patients with the onset of diabetes after the age of 30 years.
 ...
PMID:Hemoglobin A1 and diabetic retinopathy. 51 7


<< Previous 1 2 3 4 5 6 7 8 9 10 Next >>