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

We applied a simplified version of the method suggested by Sugihara-May (Nature 1990: 344: 734-41) to study the control of heart rate (HR) in subjects with diabetes mellitus. The method aims to predict the future of an observation, if a series of observations on the same phenomenon is available. The method quantifies the fact that the series is predictable more or less longtime in the future. A random series is only shortly predictable in the future. HR and blood pressure were measured from beat to beat (by the Finapres system) for about 0.5 hours in 11 subjects with diabetes mellitus and normal blood pressure (group D) and in 10 controls subjects (group N). The subjects were sitting in a temperature-controlled quiet room, isolated from all external stimuli. The 2 groups were matched for age, and had the same weight and height. No difference was observed in mean-value and standard deviation (SD) of BP and HR between the 2 groups. Groups N/D: SBP = 112 +/- 11/123 +/- 11 mmHg, NS; DBP = 64 +/- 9/67 +/- 12 mmHg, NS; HR = 70 +/- 10/69 +/- 7 b/min, NS. Standard deviation of PAS = 5.5 +/- 1.6/5.7 +/- 1.9 mmHg, NS and SD of DBP = 3.5 +/- 0.9/3.4 +/- 1.2 mmHg, NS. The SD of HR (3.0 +/- 0.5/2.3 +/- 1.0 b/min in groups N/D) was somewhat lower in diabetics than in control subjects but the difference was not significant.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[Chaotic aspect of heart rate and blood pressure in diabetic patients]. 148 56

The purpose of the study was to investigate the development of microangiopathic complications in North African sand rats with diabetes induced by a long-term standard laboratory diet. Hyperinsulinaemic rats, whether non-diabetic obese or diabetic, developed capillary basement membrane (CBM) thickening in the skin; in insulin-dependent animals, this change was diffuse. Many PAS positive areas were demonstrated in skeletal muscle and myocardium, together with evidence of microangiopathy; the primary myocardial lesion in insulin-dependent disease was ischaemic fibrosis. The kidney was also affected with marked basement membrane thickening in Bowman's capsule and glomerular capillaries; glomerulosclerosis and tubular changes were found in insulin-dependent disease. No evidence of diabetic retinopathy was found, and there was a high incidence of cataract.
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PMID:Diabetes mellitus in sand rats (Psammomys obesus): microangiopathy during development of the diabetic syndrome. 174

Three hundred and forty-four cases of active primary tuberculosis admitted to the National Sanatorium Seiransou Hospital from 1980 to 1987 were studied and compared with 101 cases admitted from 1966 to 1969. None had a previous history of tuberculosis, and all were diagnosed via positive smears for acid-fast bacilli and/or positive Mycobacterium tuberculosis cultures. The age distribution showed that in the recent cases, the highest incidence among the male patients was observed in the middle-age group (30-59 yr) and in the older age group (over 60 yr) among the female patients. In the earlier cases, the younger (under 29 yr) and middle-age groups showed a higher incidence than the older age group for both sexes. However, when the prevalence rate was calculated for recent and past cases using the total population of the districts where the patients lived, it was observed that tuberculosis was most prevalent among the older age group for both sexes. Seventy percent of these cases were admitted to the hospital due to self-conscious symptoms, and 20% were referred as a result of mass-screening chest X-ray examinations. The rest of cases were discovered by routine radiographs taken during admission for unrelated illnesses. Some of the middle- and older-aged patients had predisposing factors, such as diabetes mellitus, gastric ulcers and malignancy, in their past histories or as complicating diseases. Twenty percent of all cases had a family history of tuberculosis. In most cases, a second family member was admitted with tuberculosis within 10 years after the first family member's presentation; however, some cases developed after 30-40 years. This fact suggests a possible hereditary or genetic disposition rather than direct transmission of M. tuberculosis. Drug resistance was observed in 5-19% of the primary cases, highest in the younger age group, in whom tuberculous lesions revealed on chest X-rays were unilateral rather than bilateral as in the older patients. Radiograph findings were primarily infiltrative in the past, whereas cavitation was the prominent feature in recent cases. Tuberculin skin testing was 90% positive in all groups except the older-age males, whose positivity rate was 71%. In the past, 25% of the cases were treated with both surgery and chemotherapy, including SM, PAS and INH, whereas only 2.5% were operated in recent cases. There were 11 cases (3.2%) of extrapulmonary tuberculosis that included involvement of the urinary tract, larynx, ribs and cervical lymph nodes.(ABSTRACT TRUNCATED AT 400 WORDS)
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PMID:[Clinical comparison of active primary tuberculosis in recent years and the past]. 178

The contribution of obesity and/or diabetes to liver pathology in the morbidly obese patient is controversial. We studied the liver biopsies of 100 consecutive patients undergoing gastric bypass surgery for morbid obesity. Multiple morphologic parameters were analyzed and graded independently, without knowledge of the clinical history, liver function tests, and oral glucose tolerance results of the patients. Six percent of the entire group demonstrated no fat, 42% mild fat, 20% moderate fat, and 24% severe fatty metamorphosis of the liver. Twenty-three percent of the patients had central vein fibrosis, 23% sinusoidal fibrosis, 19% bridging fibrosis, and 4% cirrhosis. Thirty-six percent of the patients had some degree of steatohepatitis, 66% possessed so-called glycogen nuclei of hepatocytes, 6% had PAS-positive thickening of blood vessels in the portal tracts, and 1% had lipogranulomas. The degree of fatty metamorphosis and fibrosis was analyzed in three separate groups, categorized by the glycemic status of the patient: 46 patients with normal glucose tolerance (NGT), 23 patients with impaired glucose tolerance (IGT), and 31 patients with non-insulin-dependent diabetes mellitus (NIDDM). Increasing severity of fatty metamorphosis from the normoglycemic obese to the diabetic obese patients was found, which was statistically significant by chi 2 analysis. Four of the six patients showing no fatty metamorphosis were normoglycemic. Glycogen nuclei and PAS-positive blood vessels were significantly more prevalent in the diabetic obese than in the normal obese. In conclusion, the distribution of significant liver histopathology in the morbidly obese patient correlates in severity with the degree of impaired glycemic status.
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PMID:Liver pathology in morbidly obese patients with and without diabetes. 153 87

Diabetic cheiroarthropathy (DCA) or pseudosclerodermatous hand of the diabetic is characterized by nonpainful limited extension of the proximal metacarpophalangeal and/or interphalangeal joints with spontaneous flexum of the fingers. The mechanism of lesion formation is poorly known but apparently associates neurogenic, vascular and cutaneous phenomena. Fifteen patients with DCA (9 men, 6 women; range 20-74 years) were studied by capillaroscopy, photoplethysmography and skin biopsy. Eleven had type 1 diabetes and 4 type 2 over periods ranging from 1 to 42 years (mean 19.9 years). Diabetic retinopathy was noted 10/15 times, nephropathy 5/15 times and neuropathy of the lower limbs 13/15 times. All patients had at least one of these abnormalities. In capillaroscopy, "Shoal of fish" features of diabetic microangiopathy were found only 4 times, but minor dystrophy was noted in 12 cases. In digital photoplethysmography, a drop in digital systolic pressure or an increase in pulse time was noted in 5 cases. The Hillestad test was less than or equal to 2 in 8 patients. Histological study showed constant dermal collagenous fibrosis in diseased skin, which was also found in normal skin in 6/13 patients. PAS staining showed a thickening of vascular basal membrane 14/15 times in diseased skin and 11/13 times in normal skin. The relation between DCA and microangiopathy is discussed in terms of collagen metabolism abnormalities observed during diabetes.
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PMID:[Diabetic cheiroarthropathy. Microcirculatory aspects]. 231 10

In rats with streptozotocin-induced diabetes antioxidant protection of diabetic angiopathy was performed by flunarizine (10 mg/kg/day) and aligeron (10 mg/kg/day), applied intraperitoneally during 2.5 months of diabetes. Diabetic vascular complications were assessed by morphologic determination of PAS-positive mucopolysaccharides and measurement of vascular wall thickness in addition to quantitative estimation of lipid hydroperoxides, thromboxane A2/prostacyclin disbalance and plasma beta-thromboglobulin changes. Both drugs prevented development of diabetic angiopathy in rats by inhibition of lipid peroxidation, prostanoid synthesis and platelet activity, but the effect of flunarizine was more pronounced, which could be explained by its additional blocking effect of abnormal calcium flux into vascular cells. The free radical scavenging action of flunarizine and aligeron was investigated.
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PMID:Streptozotocin-induced diabetes in rat. III. Antioxidant protection of vascular complications by flunarizine and aligeron. 253 Dec 58

Diabetic nephropathy develops in many diabetic patients as consequence of glomerulosclerosis. On the basis of a series of recent observations it is suggested that a combination of metabolic and hemodynamic changes is responsible for the pathogenesis of diabetic nephropathy. Since the glomerular filtration unit has been characterized to consist of collagen type IV and minor components like laminin, fibronectin and heparan sulfate proteoglycan, influence of diabetes on basement membrane (BM) components has been studied. Biochemical alterations of glomerular BM consist of an increased nonenzymatic glucosylation of type IV collagen leading to unphysiological crosslinking. This, in turn, may result in alteration of the size selective properties of the glomerular filtration unit. Changes in composition of glomerular BM have recently been described. An increased synthesis of type IV collagen with concomitant decrease of heparan sulfate proteoglycan may lead to alteration of the charge selective barrier and consequently to increased permeability of the glomerular BM. Permanently unbalanced synthesis of BM components finally results in obliteration of the capillary lumen. In late state nephropathy intrinsic basement membrane components are no longer produced. Instead, massive accumulation of PAS positive material occurs.
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PMID:Pathobiochemical aspects of diabetic nephropathy. 297 77

In this chapter we have presented information on the development of large vessel damage in diabetes mellitus. A series of changes occur independent of the presence of atherosclerosis. The abnormalities include accumulation of PAS-positive material, laminin, fibronectin, type IV collagen and connective tissue with lack of acid mucopolysaccharides, and deposition of calcium. It is of particular interest that accumulation of PAS-positive material and lack of acid mucopolysaccharides are recognized as the histological markers of diabetic microangiopathy. These changes are in agreement with the hypothesis of a non-atherosclerotic large vessel damage, that is, diabetic macroangiopathy. From this standpoint the working hypothesis of a specific diabetic macroangiopathy should generate new ways to study the mechanism of the large vessel disease of diabetes over and above the traditional concept of classical atherosclerosis.
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PMID:Pathology of macrovascular disease. 297 20

Streptozotocin diabetes in rats was complicated by spontaneous hypertension (SHR) and myocardial infarction (MIC), considered as "risk groups". Renal function was assessed on the basis of blood urea nitrogen (BUN) and albuminuria. BUN increased by 36% in Wistar diabetic group, by 100% in SHR + diabetes, and by 51% in MIR + diabetes. Morphologic changes were assessed by estimation of PAS-positive glycosaminoglycans and measurement of vascular wall thickness of glomerular arterioles. The risk groups showed exaggerated tendency for development of diabetic angiopathy. A significant imbalance between TXA2 and prostacyclin was found, which was reflected by TXB2/6-keto-PGF1 alpha (the stable metabolites of TXA2 and prostacyclin, respectively) ratio, which increased by 38% in Wistar diabetic rats, by 61% in SHR + diabetes, and by 133% in MIR + diabetes. These changes correlated very well with increased platelet aggregability (r = 0.70; p less than 0.05) and with increased lipid peroxide level (r = 0.60; p less than 0.05), but neither with total plasma cholesterol (r = 0.20), nor with plasma triglycerides (r = 0.34). Lipid peroxides increased 5-fold in Wistar diabetic rats, 6-fold in SHR + diabetes, and 5.5-fold in MIR + diabetes. A causative relationship between TXA2/PGI2 imbalance and lipid peroxide changes on one hand, and diabetic angiopathy, on the other, was suggested.
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PMID:Streptozotocin-induced diabetes in rat. I. Influence of hypertension and myocardial infarction on the development of vascular complications. 322 39

In a previous work, Segers and adl., the histological and histochemical study of the features of cellulitis is performed, expliciting the importance in this lipodystrophy of microangiopathy PAS positive. As a complement of that work, we study a group of 254 patients, all females, which came to us to be treated for their cellulitis, general clinical and local laser therapy. All of these patients presenting microangiopathy of their dermohipodermic capillary vessel confirmed by biopsy. These cases were divided in four groups according to the existence or not family antecedents of diabetes mellitus, and positivity or negativity to the test of glucose overcharge, sensibilized with corticoid (Fajans-Conn). The results are extensively described and discussed, and considerations are made referring to the aetiopathogenesis of both entities, diabetes and micro-pathological angiopathy, that could be generically and/or immunologically related.
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PMID:[Cellulitis. Study of microangiopathy in 254 cases]. 391 89


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