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

We have demonstrated that in rhesus monkeys, 18 months of diabetes alters the end-diastolic pressure, end-diastolic volume relations without hypertrophy. Accumulation of collagen in the myocardial interstitium was the apparent basis for abnormal left ventricular performance. Neither collagen concentration nor left ventricular performance were signigicantly affected by dietary lipid composition. These myocardial abnormalities occurred at a stage when coronary atherosclerosis was limited. However, the relative influence of coronary atherosclerosis and myocardial alterations during more prolonged lipid feeding remains to be determined.
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PMID:Altered myocardial function and collagen in diabetic rhesus monkeys on atherogenic diet. 11 54

Baboon and human articular and growth cartilage was extracted with 4M guanidinium chloride in the presence of proteolysis inhibitors. After dialysis against 8M urea pH 6.8 the proteins were separated from proteoglycans by ion-exchange chromatography. The concentrated and reduced protein fractions was analyzed by SDS-PAGE. Bands corresponding to collagen and to 6 major non-collegenous proteins were found. Two of the latter were identified with the link-proteins. By using small columns and microconcentration procedures, a gel-electrophoretic analysis of link-proteins extracted from small pieces of cartilage was performed and ten cases of osteochondrodysplasias were studied. No abnormalities were detected in the following syndromes: achondroplasia, diastrophic dwarfism, thanatophoric dwarfism, Jeune disease, spondyloepiphyseal dysplasia congenita, Kozlowski syndrome, osteogenesis imperfecta, polyepiphyseal dysplasia with diabetes mellitus.
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PMID:Link-proteins and non-collagenous proteins from normal and chondrodysplastic cartilages. 11 15

Platelet aggregation and adhesion are commonly increased in diabetes mellitus. These abnormalities may in part be responsible for the increased incidence of vascular disease in diabetics. We have investigated the effects of diet, diet plus glibenclamide, and diet plus gliclazide on plasma glucose control and platelet function in 10 newly diagnosed maturity-onset diabetics who had not previously been treated. Before treatment, the mean postprandial plasma glucose value was 13,4 +/- 0,8 mmol/l, which fell insignificantly on dietary treatment, to 12,2 +/- 1,0 mmol/l (P greater than 0,05). Both glibenclamide and gliclazide, when added to the diet, significantly lowered mean plasma glucose values to 9,3 +/- 0,8 mmol/l and 7,8 +/- 0,8 mmol/l respectively (P less than 0,05). Platelet aggregation in response to 1 mumol adenosine diphosphate (ADP) was increased in the diet period, whereas aggregation in response to 10 mumol and 100 mumol was normal. This suggests an increased sensitivity of the platelets to ADP in diabetic patients. The addition of both glibenclamide and gliclazide reduced the magnitude of the response to within the normal range. Platelet aggregation in response to 10 mumol adrenaline and 750 micrograms/ml collagen was significantly reduced by glibenclamide (P less than 0,05). We conclude that sulphonylurea therapy appears to reduce the increased platelet aggregation which occurs in diabetics. This may play a role in the prevention of vascular disease.
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PMID:Effects of the sulphonylurea drugs gliclazide and glibenclamide on blood glucose control and platelet function. 12 45

Using [14-C]lysine protocollagen substrate prepared from chick embryo tibiae, lysyl hydroxylase activity was found in the 17 000 times g supernatant and particulate fractions obtained from homogenates of isolated rat renal glomeruli. Specific activities using the latter as an enzyme source were about 20-30% that of the supernatant. [14-C]Hydroxylysine formation was proportional to substrate and enzyme concentration, and to time for up to 120 min of incubation. Omission of alpha-ketoglutarate and ascorbate in the incubational assay markedly depressed activity. Hydroxylation of substrate by supernatant enzyme from streptozotocin diabetic rats was significantly increased over that of normal. In contrast, the activity of supernatant fractions from glomeruli of pancreatectomized, normoglycemic animals did not differ from that of non-operated controls. It is concluded that elevated glomerular lysine hydroxylase activity accompanies the increased glomerular collagen synthesis found in streptozotocin diabetes, and that chronic hyperglycemia may be implicated in these changes.
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PMID:Glomerular protocollagen lysyl-hydroxylase activity in streptozotocin diabetes. 12 80

The chronologic ages of human subjects were determined experimentally by enzymatic digestion of tendon collagen samples. Determined age closely matched actual age for individuals dying with a variety of major diseases. Juvenile diabetics did not fit this pattern; their experimentally determined ages were significantly greater than their actual ages. This raises the possibility of relationships between diabetes mellitus, changes in connective tissue, and accelerated aging.
Diabetes 1975 Oct
PMID:Apparent accelerated aging of human collagen in diabetes mellitus. 17 Jan 54

The activities of the four enzymes catalyzing intracellular post-translational modifications of the collagen polypeptide chains were assayed in the kidneys of rats with streptozotocin diabetes. When the changes in the four enzyme activities were expressed per milligram of protein in the 15,000 X g supernatant of the kidney homogenates, there were no changes in any of the enzyme activities at four weeks and only slight increases in the prolyl and lysyl hydroxylase activities at 12 weeks after the induction of diabetes. When the changes were expressed as total enzyme activities per two kidneys, again no changes were found in any enzyme activity at four weeks, but at 12 weeks significant increases were found in all four enzyme activities, namely prolyl hydroxylase, lysyl hydroxylase, collagen galactosyltransferase, and collagen glucosyltransferase. The data would be consistent with an increased collagen synthesis in diabetic kidneys, but they do not support the hypothesis that there might be specific changes in some of these enzyme activities or in the level of certain posttranslational modifications of the collagen polypeptide chains in this disease.
Diabetes 1976 Nov
PMID:Intracellular enzymes of collagen biosynthesis in rat kidney in streptozotocin diabetes. 18 46

Numerous general metabolic systems are disturbed in association with psoriasis: the frequency of diabetes mellitus and of hyperuricaemia, lipid disturbances and a decrease in folates as a result of their excessive consumption by the skin. Cutaneous metabolism is also altered. Numerous compounds are formed in excess from glucose: amino acids, fatty acids and sterols, lactic acid--the formation of which persists in the corneal layer, ribose and ribulose--synthesised as a result of glucose-6-phosphate-dehydrogenase hyperactivity (role of the increased catabolism of dehydro-epi-androsterone) and uronic acids. The accumulation of glycogen is probably due to excessive synthesis and impaired breakdown. These abnormalities may exist to a lesser extent in healthy skin. In the corneal layer there are lipid vacuoles visible under the electron microscope. Lipogenesis is increased. The same may apply to lipolysis (blood NEFA are increased). Esterification of cholesterol is decreased. The utilisation of ATP by cell membranes is probably diminished (low ATP ase activity). The absence of formation of keratohyaline is due to persistence of the repression which normally prevents it in the mucus body. Renewal of collagen appears increased. The synthesis of DNA is increased in the lesions and neighbouring areas. It is possible that these various abnormalities are dependent upon modifications in the regulator systems of cyclic AMP and GMP, variations in which are however discussed.
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PMID:[The biochemistry of psoriasis]. 18 76

There is a definite need for replacement estrogen therapy in menopausal women exhibiting vasomotor symptoms or osteoporosis, particularly if the woman has had bilateral oophorectomy. There is a less clearly defined need in women complaining of emotional symptoms. Atrophic vaginitis and trigonitis is usually best treated with topical application of estrogen, which does not have systemic side effects if used weekly; more frequent use can lead to vascular absorption. Some of the problems associated with estrogen replacement are dose-related and can be eliminated by using smaller dosages. Uterine bleeding can usually be controlled by administering cyclically with progesterine. Hypertension, thrombosis, and adenocarcinoma are problems associated with administration of exogenous estrogens; use should be undertaken with great care in women exhibiting these conditions and patients should be followed closely to make sure such conditions are not developing. Other conditions which may worsen with estrogen therapy are diabetes mellitus, seizure disorders, migraine, multiple sclerosis, collagen diseases, cholelithiasis, and hyperlipidemia. None except hyperlipidemia is an absolute contraindication but risk/benefit ratios must be considered carefully in these cases.
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PMID:Estrogens for the menopause. Maximizing benefits, minimizing risks. 19 9

Gingiva from alloxan and streptozotocin-diabetic rats exhibited markedly enhanced collagenolytic activity in tissue culture. This effect was eliminated by puromycin or by repeated freeze-thawing of the tissue prior to incubation. Soluble extracts of the diabetic gingiva in situ were found to contain breakdown products of collagen similar in size to the reaction products generated by tissue collagenase. These fragments were not detected in the control tissue. This study indicates that experimental diabetes stimulates the synthesis of gingival collagenase in culture and that a similar effect occurs in vivo.
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PMID:Enhanced collagenase activity in diabetic rat gingiva: in vitro and in vivo evidence. 21 Feb

The effect of the sulphonylureas gliclazide (S 852) and glibenese on platelet function, blood lipid levels and the control of diabetes, was prospectively evaluated in 12 maturity-onset diabetic subjects by means of a double-blind crossover study. Including the pretrial period, platelet aggregation in response to collagen was uniformly lower than in matched normal controls, but neither drug produced any additional effect on platelet function. Control of blood glucose levels was no better than with comparable agents, and no measurable changes occurred in blood lipid levels. The drugs had no significant side-effects and were well tolerated. It is concluded that neither agent offers special advantages over other sulphonylureas, particularly in regard to platelet function.
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PMID:An evaluation of the effects of some sulphonylureas on platelet function. 32 25


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