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

By application of streptozotocin diabetes mellitus is induced in rats: 40 mg/kg body weight streptozotocin produce a fairly serious diabetes with minimal ketosis, 125 mg/kg body weight streptozotocin cause a severe diabetic keto-acidosis. After 72 hours these animals and also a group of control animals receive 8.33 mCi/animal 3H-leucine intraperitoneally. By means of stripping film autoradiograms the rates of uptake of 3H-leucine in different areas of the rat brain are measured. The values of the control animals are compared with those of a fairly serious diabetes and those of a severe diabetic keto-acidosis. In the regions of the neocortex parietalis and of the thalamus the 3H-leucine values of the diabetic animals are considerably lower in comparison with the controls, and that irrespective of the degree of severity of the diabetic disease. Compared with the control animals the 3H-leucine values of diabetic animals decrease according to the degree of severity of the disease within the Ammon's horn and the dentate fascia. Within the Ammon's horn and dentate fascia also the zinc contents change very specifically in different areas with the degree of severity of diabetes mellitus. The zinc is identified on H2S-alcohol fixed brains by means of a photographic development. The particular significance of the Ammon's horn and the dentate fascia concerning diabetic metabolic conditions is discussed.
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PMID:[Autoradiographic studies on protein metabolism and histochemical demonstration of the brain zinc content in diabetes mellitus. 1. Comparison in experimental streptozotocin-induced diabetes]. 16 76

TAKING INTO ACCOUNT AGE, SEX, GEOGRAPHICAL DISTRIBUTION, OBESITY, AND ASSOCIATED CAUSE OF DEATH, IT WAS CONCLUDED THAT: (1) the extent of aortic calcification was much lower in cerebral haemorrhage than in cerebral infarct. In deaths due to cerebral haemorrhage aortic calcification was at about the same level as in those due to cancer of the stomach, while in deaths due to cerebral infarct it was at the same level as in those due to coronary heart disease; (2) the prevalence of large myocardial scar was low in deaths due to cerebral haemorrhage (at about the same level as in those due to prostatic cancer), while in deaths due to cerebral infarct it was more frequent (at the same level as in deaths due to diabetes); (3) the extent of coronary calcification and prevalence of coronary stenosis and fresh myocardial infarction were low in the cerebral haemorrhage and cerebral infarct deaths, but a little lower in the former; and (4) the extent of raised lesions of the aorta and coronary arteries was similar in the cerebral haemorrhage and cerebral infarct deaths, the level of aortic lesions being high and overlapping in level with those in the coronary heart disease and hypertensive deaths, and the levels of coronary lesions being much lower and well below those in the coronary and diabetic hypertensive deaths.
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PMID:Atherosclerosis and myocardial lesions in subjects dying from fresh cerebrovascular disease. 108 1

We were checking the thermal waters of Varazdinske Toplice--sulfuric mineral calcium natrium hydrocarbonic sulfatic hyperthermic (t: 57.8 st. C, H2S: 8.1 mg/l, min: 955 mg/l mvol uk. 24.70 Ca: 50.12 mvol%, HCO3 54.12 mval%, SO4 26.18 mval%) on the sugar level in the patient's blood, suffering from Diabetes mellitus. We were following the state of 35 patients who were on the peroral therapy with the antidiabetics and ADA diet before coming in our hospital. We excluded the medication therapy at the beginning of the experiment. The patients were drinking 1200 ml of mineral water daily and spent 30 min bathing in the same water. The checking lasted 20 days in the average, and the level of GUK was measured every third day. The results are encouraging, further examinations are still lasting.
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PMID:[Use of the Varazdinske Toplice mineral water in the treatment of diabetes mellitus]. 213 62

Because the role of elemental sulfur in human nutrition has not been studied extensively, it is the purpose of this article to emphasize the importance of this element in humans and discuss the therapeutic applications of sulfur compounds in medicine. Sulfur is the sixth most abundant macromineral in breast milk and the third most abundant mineral based on percentage of total body weight. The sulfur-containing amino acids (SAAs) are methionine, cysteine, cystine, homocysteine, homocystine, and taurine. Dietary SAA analysis and protein supplementation may be indicated for vegan athletes, children, or patients with HIV, because of an increased risk for SAA deficiency in these groups. Methylsulfonylmethane (MSM), a volatile component in the sulfur cycle, is another source of sulfur found in the human diet. Increases in serum sulfate may explain some of the therapeutic effects of MSM, DMSO, and glucosamine sulfate. Organic sulfur, as SAAs, can be used to increase synthesis of S-adenosylmethionine (SAMe), glutathione (GSH), taurine, and N-acetylcysteine (NAC). MSM may be effective for the treatment of allergy, pain syndromes, athletic injuries, and bladder disorders. Other sulfur compounds such as SAMe, dimethylsulfoxide (DMSO), taurine, glucosamine or chondroitin sulfate, and reduced glutathione may also have clinical applications in the treatment of a number of conditions such as depression, fibromyalgia, arthritis, interstitial cystitis, athletic injuries, congestive heart failure, diabetes, cancer, and AIDS. Dosages, mechanisms of action, and rationales for use are discussed. The low toxicological profiles of these sulfur compounds, combined with promising therapeutic effects, warrant continued human clinical trails.
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PMID:Sulfur in human nutrition and applications in medicine. 1189 44

Sulfur amino acids (sAAs) are potential candidates as risk factors for cardiovascular disease (CVD). However, we recently reported that chronic hemodialysis patients with CVD had a greater prevalence of malnutrition, hypoalbuminemia, and lower plasma total homocysteine (tHcy) levels than those without CVD. In this cross-sectional study, we examined the relationship of plasma sAAs to CVD and nutritional status in 151 patients with chronic renal failure (CRF) close to the start of regular dialysis treatment (33 +/- 7 days before the first dialysis treatment). Clinical signs of CVD were present in 32% of patients with CRF, 41% had malnutrition assessed by subjective global nutritional assessment (SGNA) score, and 26% had diabetes mellitus (DM). Plasma tHcy levels were high in 91% of patients, as were plasma total cysteine (tCys) levels, whereas plasma methionine (Met) and taurine (Tau) levels were normal. Patients with CRF who had CVD were older, more often malnourished, and had lower tHcy and serum albumin (s-albumin) levels and a greater frequency of DM than those without CVD. Plasma tCys, Met, and Tau levels did not differ between patients with CRF with and without CVD. The tCys-tHcy ratio was higher in patients with CVD and related to SGNA score and DM. Moreover, this ratio, but not tHcy or tCys level, correlated with age and triglyceride, total cholesterol, and apolipoprotein B levels. Malnutrition and hypoalbuminemia were associated with low plasma sAA levels (tHcy, Met, and Tau); tCys was related to s-albumin level, but not SGNA score. Among patients with diabetes, sAA levels did not differ between patients with and without CVD or between malnourished and well-nourished patients. In conclusion, patients with CRF at the start of dialysis treatment with CVD were more often diabetic, malnourished, and had lower s-albumin and tHcy levels and a higher tCys-tHcy ratio than patients with no CVD. tCys-tHcy ratio, but not tHcy or tCys levels per se, was related to cardiovascular risk factors, suggesting that cysteine may have a role in the development of CVD. Malnutrition, hypoalbuminemia, and DM in patients with CRF influence sAA levels, mainly plasma tHcy, which should be considered when evaluating hyperhomocysteinemia as a cardiovascular risk factor.
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PMID:Plasma sulfur amino acids in relation to cardiovascular disease, nutritional status, and diabetes mellitus in patients with chronic renal failure at start of dialysis therapy. 1220 Jul 98

Sulfur amino acid metabolism has been receiving increased attention because of the link to chronic diseases such as cardiovascular disease, Alzheimer's disease, and diabetes. In addition, the role of cysteine and optimal intakes for physiological substrates such as glutathione are currently of considerable interest in human health. Although the dietary indispensability of methionine is not in question, the ability of cysteine to substitute for a portion of its requirement has been the topic of much debate. Methionine is often the most limiting amino acid in the diets of the developing world's population because of its low concentration in cereal grains. Therefore, the ability of cysteine to substitute for methionine requirement is not just biologically interesting; it is also of considerable economic and social importance. The primary goal of this review is to discuss the available evidence on the effect of cysteine substitution for methionine to meet the total sulfur amino acid requirement in adult humans, including an assessment of the methodological features of experiments with conflicting results. Assessment of the requirement experiments for amino acids with complex metabolism such as methionine and cysteine must begin with a careful definition of requirements and what substitution means. As a result of these definitions, a set of criteria for the intakes of methionine that will allow demonstration of the substitution effect have been developed. Some recent publications are assessed using these definitions and criteria, and a possible reason for the conflicting results in the literature is proposed. An approach to estimating tolerable upper intakes is also proposed. Research on in vivo sulfur amino acid metabolism in humans is tremendously difficult, and therefore, we do not wish to be overly critical of the high-quality work of the ambitious and highly intelligent men and women who have conducted various studies. Our goal is to objectively review the data for the reader in a logical and comprehensive manner and propose methods that may avoid difficulties in future studies.
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PMID:The in vivo sparing of methionine by cysteine in sulfur amino acid requirements in animal models and adult humans. 1670 40

Cystathionine gamma-lyase (CSE) is a key enzyme in the trans-sulfuration pathway, which uses L-cysteine to produce hydrogen sulfide (H2S). Functional changes of pancreatic beta cells induced by endogenous H2S have been reported, but the effect of the CSE/H2S system on pancreatic beta cell survival has not been known. In this study, we demonstrate that H2Sat physiologically relevant concentrations induced apoptosis of INS-1E cells, an insulin-secreting beta cell line. Transfection of INS-1E cells with a recombinant defective adenovirus containing the CSE gene (Ad-CSE) resulted in a significant increase in CSE expression and H2S production. Ad-CSE transfection also stimulated apoptosis. The other two end products of CSE-catalyzed enzymatic reaction, ammonium and pyruvate, had no effects on INS-1E cell apoptosis, indicating that overexpression of CSE may stimulate INS-1E cell apoptosis via increased endogenous production of H2S. Both exogenous H2S (100 microM) and Ad-CSE transfection inhibited ERK1/2 but activated p38 MAPK. Interestingly, BiP and CHOP, two indicators of endoplasmic reticulum (ER) stress, were up-regulated in H2S-and CSE-mediated apoptosis in INS-1E cells. After suppressing CHOP mRNA expression, H2S-induced apoptosis of INS-1E cells was significantly decreased. Inhibition of p38 MAPK, but not of ERK1/2, inhibited the expression of BiP and CHOP and decreased H2S-stimulated apoptosis, suggesting that p38 MAPK activation functions upstream of ER stress to initiate H2S-induced apoptosis. It is concluded that H2S induces apoptosis of insulin-secreting beta cells by enhancing ER stress via p38 MAPK activation. Our findings may help unmask a novel role of CSE/H2S system in regulating pancreatic functions under physiological condition and in diabetes.
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PMID:H2S, endoplasmic reticulum stress, and apoptosis of insulin-secreting beta cells. 1743 Aug 88

Despite its long-standing reputation as a foul smelling and toxic gas that is associated with the decay of biological matter,hydrogen sulphide (H2S) has emerged as an important regulator of cardiovascular homoeostasis. H2S promotes a number of cellular signals that regulate metabolism, cardiac function and cell survival. Endogenous H2S bioavailability is regulated by several enzymes involved in the biosynthesis of cysteine. This study by Brancaleone et al. in the current issue of the British Journal of Pharmacology provides novel insights into the impairment of H2S biosynthesis in the setting of diabetes mellitus. The authors report that enzymic H2S biosynthesis is impaired in a murine model of type 1 diabetes and the attenuation in H2S bioavailability is associated with impaired vascular reactivity. This study has profound implications for the use of pharmacological agents to augment endogenous H2S synthesis or agents that release H2S to augment the levels of this gaseous signalling molecule in cardiovascular disease.
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PMID:Potential importance of alterations in hydrogen sulphide (H2S) bioavailability in diabetes. 1880 20

Hypertension represents a serious problem in Romania, as there are over 3 million hypertensive people in our country. There is a high incidence of deaths caused by hypertension.WE PERFORMED AN ANALYTICAL PROSPECTIVE STUDY THAT AIMS TO DETERMINE: prevalence of arterial hypertension in a population from Cluj county, distribution on age and gender, arterial hypertension severity, association of hypertension with other cardiovascular risk factors. Our study included 2266 patients, age 14 years old up to over 90 years old, both masculine and feminine gender, known with hypertension and new-diagnosed ones. Each subject was submitted to an interview based on a questionnaire. Diagnosis of arterial hypertension was established according to ESH criteria that consider as hypertension: values over 140/90 mmHg. Out of all subjects submitted to the study 647 (29.74%) were diagnosed with arterial hypertension and, from these, 102 (15.13%) were new-diagnosed patients.We found out a predominance of arterial hypertension at the age of 51-60 and over 60, an increased involvement of feminine sex; an association of hypertension with other major cardiovascular risk factors: obesity, diabetes, dislypidemia.Arterial hypertension represents an important health problem in Romania due to an increased prevalence, major impact on morbidity and mortality by cardiovascular and cerebro-vascular disease. These facts accentuate the necessity of an early diagnosis, of making people aware of the severity of the disease and it's impact on their lifestyle.
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PMID:Arterial hypertension - prevalence of risk factors and morbide associations that increase cardiovascular risk. 2197 16

The coexistence of hypertension and diabetes results in the rapid development of nephropathy. Hydrogen sulfide (H2S) is claimed to control the vascular and renal functions. This study tested the hypothesis that exogenous H2S lowers the blood pressure and decreases the progression of nephropathy in spontaneously hypertensive rats (SHR) that were diabetic. Eighteen SHR were divided into three groups: SHR, SHR diabetic, and SHR diabetic treated with a group of Wistar-Kyoto rats serving as normotensive nondiabetic control. Diabetes was induced with streptozotocin (STZ) in two groups and one diabetic group received sodium hydrosulfide (NaHS), a H2S donor for 5 weeks. Blood pressure was measured in conscious and anesthetized states and renal cortical blood perfusion in acute studies. Plasma and urinary H2S levels, creatinine concentrations, and electrolytes were measured on three different occasions throughout the 35-day period. Diabetic SHR had higher blood pressure, lower plasma and urinary H2S levels, and renal dysfunction as evidenced by increased plasma creatinine, creatinine clearance, and decreased urinary sodium-to-potassium ratio and renal cortical blood perfusion. NaHS reduced blood pressure, increased H2S levels in plasma and urinary excretion, and reversed the STZ-induced renal dysfunction. The findings of this study suggest that the administration of exogenous H2S lowers the blood pressure and confers protection against the progression of STZ-induced nephropathy in SHR.
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PMID:Exogenous hydrogen sulfide (H2S) reduces blood pressure and prevents the progression of diabetic nephropathy in spontaneously hypertensive rats. 2222 51


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