Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0011854 (type 1 diabetes)
 20,749 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Immunophenotyping of the early lesion in the pancreatic islets of Langerhans demonstrates a predominance of CD4+ lymphocytes, which may be preceded by an increase in islet macrophages. This observation implies that both types of cells may be involved in autoimmune-mediated beta-cell destruction leading to IDDM. In an attempt to attribute a role to beta-cell antigen-specific CD4-expressing T-cell clones recently isolated from a newly diagnosed IDDM patient, we investigated whether such CD4 T-cells may be pathogenic in an in vitro cytotoxicity assay with HLA-DR-matched antigen-presenting macrophages as target. We report herein that, indeed, beta-cell antigen-specific CD4+ T-cells are capable of lysing macrophages in an antigen-specific fashion. This cytotoxicity is HLA-DR restricted, T-cell receptor complex mediated, and CD4 dependent. These observations imply that both helper T-cells and macrophages may be involved in the disease process via interaction between T-cells and macrophages pulsed with beta-cell antigen.
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PMID:Beta-cell antigen-specific lysis of macrophages by CD4 T-cell clones from newly diagnosed IDDM patient. A putative mechanism of T-cell-mediated autoimmune islet cell destruction. 139 14

Defective glucose counterregulation commonly seen in intensively treated insulin-dependent diabetes (IDDM) is mediated in part by a failure of compensatory stimulation of hepatic glucose production. Since the response of the liver to insulin-induced hypoglycemia normally involves activation of gluconeogenesis, we measured [14C]alanine conversion to [14C]glucose (a qualitative index of gluconeogenesis) and glucose production (using [3-3H]glucose) in seven intensively treated type I diabetic subjects (hemoglobin-A1, 7.1 +/- 0.4%) during low dose infusion of insulin (0.3 mU/kg.min for 210 min). IDDM patients received insulin overnight to maintain euglycemia before study. Although insulin levels rose to a similar extent as those in normal control subjects (n = 6), the fall in plasma glucose was markedly greater in IDDM (2.5 +/- 0.2 vs. 3.64 +/- 0.2 mM in controls; P < 0.01). The glucagon response was totally lost in IDDM, and epinephrine release was delayed and slightly reduced compared to that in control subjects. In contrast to that in normal subjects, hepatic glucose production in the IDDM subjects remained persistently suppressed by about 60% throughout the study. The conversion of alanine and lactate to glucose remained virtually unchanged in the IDDM, whereas in controls it increased 2-fold above baseline during the last hour of the study. Our data suggest that the failure of gluconeogenesis to increase during hypoglycemia is an important factor contributing to the defective hepatic response observed in the intensively treated type I diabetic subjects.
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PMID:Impaired stimulation of gluconeogenesis during prolonged hypoglycemia in intensively treated insulin-dependent diabetic subjects. 140 Aug 74

The epidemiology of diabetes mellitus in Thai children aged 0-15 years was studied in 1985 and compared with a previous study done in 1984. Four hundred and seventy-six questionnaires were sent each year to hospitals in Thailand. In 1984, thirty-six cases of newly diagnosed diabetes mellitus were found of which 35 were IDDM and one was NIDDM. In 1985, twenty-seven cases of new IDDM were found, no case of NIDDM was reported. Two cases of MRD were reported from the Northeastern and Southern part of Thailand. The incidence of IDDM in the whole kingdom of Thailand was 0.19/100,000/year in 1984 and 0.14/100,000/year in 1985. The male to female ratio was 1:1.5 in 1984 and 1:2 in 1985. The peak age at diagnosis showed the main peak at 14 years old in boys. The peak age of girls preceded boys by 1-2 years in 1984 and 1985. Similar findings in 1984 and 1985 were the onset of symptoms showing a seasonal variation with highest frequency in winter with a slight change of increased incidence in the rainy season of 1985. There was an increased incidence of IDDM in families with lower educational and socioeconomic levels. The newly diagnosed IDDM with DKA was 16.2, and 19.5 per cent in 1984 and 1985. The incidence of IDDM in Thai children, aged 0-15 years seems to be the lowest compared to other countries previously described which might be due to some genetic and environmental including diet, micronutrient, eating habits and life-style which might play a role in the difference.
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PMID:The epidemiology of insulin-dependent diabetes mellitus (IDDM): report from Thailand. 140 45

The evaluation of the risk of traffic accidents among drivers with IDDM and the grounds for excluding them from a driver's license are topical issues, because the E.C. is issuing strict new guidelines. The risk of diabetic patients being involved in traffic accidents as reported in foreign studies and calculated from Dutch data, does not exceed that which is to be expected on account of the prevalence of DM. This justifies a flexible policy for the licensing of drivers with diabetes mellitus.
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PMID:[Diabetic patients: no danger on the road]. 140 15

The acute and chronic effects of hypoglycemia on cognitive and psychomotor performance are reviewed. Studies involving pediatric and adult subjects, both with and without diabetes were evaluated. The preponderance of studies suggest that hypoglycemia can be an unintended yet frequent result of treatment of patients with IDDM. Significant cognitive and psychomotor deficits were reported even with mild episodes of hypoglycemia. Early age of diabetes onset and frequent episodes of hypoglycemia were found to be highly related to significant deficits in intellectual and academic performance. Patients evidencing performance deficits did not always report symptoms of hypoglycemia. Recovery of cognitive functioning lagged restoration of euglycemia but typically returned to baseline levels of performance. Recommendations for improved patient care are provided.
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PMID:Acute and chronic effects of hypoglycemia on cognitive and psychomotor performance. 140 20

The effect of race on differences in metabolic control was examined in patients with non-insulin-dependent (NIDDM) and insulin-dependent (IDDM) diabetes mellitus. Data were collected on HbA1c, age, duration of diabetes, age at onset, family function, stress, body mass index, waist/hip ratio, total cholesterol, insulin dose, diet, and physical activity. Among those with NIDDM, black patients had significantly higher HbA1c levels than their white counterparts. This difference persisted after adjustment for covariates. Among patients with IDDM, black subjects were found to have higher HbA1c levels, body mass index, and total cholesterol levels than their white counterparts. After correction for diabetes duration, relative insulin dose, physical activity, body mass index, and cholesterol, black women had significantly higher HbA1c levels than black men, white men, or white women. We conclude that race and sex differences do affect the metabolic control of patients with diabetes mellitus.
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PMID:Race-related differences in metabolic control among adults with diabetes. 141 33

The traditional role of twin studies has been to assess the relative role of genetic factors as a first step in defining the genetic architecture of complex traits. This has been based on the realization that monozygotic pairs (MZ) share all their genes, while dizygotic pairs (DZ) share 50% of their genes on average. Thus, greater similarity of MZ pairs compared to DZ pairs has been taken as prima facie evidence of the role of genetic factors. This is true provided the environmental similarity of MZ pairs is not greater than for DZ pairs for effects relevant to the trait in question. This first step in genetic studies was carried out long ago in many research areas, but not in others. More detailed knowledge of the genetic architecture of traits is then obtained by other means. In this paper, we give a brief overview of some results for metabolic diseases (ischaemic heart disease, hypertension, subarachnoid haemorrhage, NIDDM and IDDM) using the classical twin approach in a large, unselected population-based twin cohort. We also outline approaches to using twins that we believe will continue to be useful, particularly for the study of environmental effects.
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PMID:Twin studies in metabolic diseases. 141 22

Standard regression models for disease incidence data can be used to test for associations between a disease and measured genetic and environmental factors and their interactions. Complications arise when the gene is not observed, requiring segregation and linkage analysis approaches, or when the candidate gene(s) are found to be highly polymorphic, as in the HLA region. We propose a Bayesian approach to the latter problem, in which the log relative risks for all alleles at a given locus are taken to be independent and exchangeable, assuming there is no preferential zygotic assortment and negligible recombination. Multi-locus problems can be addressed either by adding exchangeable interaction terms or by adopting a multivariate prior for haplotype effects. Some simulations based on our current work on family studies of IDDM are discussed.
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PMID:Empirical Bayes methods for testing associations with large numbers of candidate genes in the presence of environmental risk factors, with applications to HLA associations in IDDM. 141 24

A retrospective analysis was performed on 70 patients with diabetes mellitus who required nutritional support over the 10-yr period 1979-1989. Information was available for 65 patients, of whom 55 had non-insulin-dependent diabetes mellitus (NIDDM). Enteral nutrition (EN, 750-2200 kcal/day) was given to 40 NIDDM patients (group A) and 6 insulin-dependent diabetic (IDDM) patients (group B), and parenteral nutrition (PN, 1600-2400 kcal/day) was given to 18 NIDDM patients (group C) and 4 IDDM patients (group D). Three NIDDM patients required both types of feeding. Preadmission diabetes treatment remained the same during feeding for 31% of the total group (38% of group A, 33% of group B, 23% of group C, and 0% of group D). The NIDDM patients in group C who received insulin during PN required a high daily dose of approximately 100 U. The IDDM patients on PN required an increase of 225% from their preadmission daily dose. The likelihood of a patient requiring a major change from preadmission diabetes therapy depended mainly on the severity of the underlying illness and on the type of feeding (greater with PN) but not on preadmission therapy, age of patient, or type of EN (cyclic vs. continuous). Hypoglycemic episodes were uncommon in all groups. There were no significant differences between the prefeeding and feeding blood glucose levels and HbA1c results.
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PMID:Management of diabetic patients requiring nutritional support. 142 78

IDDM and eating disorders are common conditions in young women. Whether a specific association exists between these two disorders remains controversial. Some studies have suggested an increased incidence of eating disorders in young women with IDDM, whereas others have not detected such an increase. These differences may be attributable, at least in part, to methodological issues in study design, measurement tools, and relatively small sample sizes. Whether the prevalence of eating disorders in IDDM is increased will be resolved only by larger studies that use standardized diagnostic interviews. We suspect that certain aspects of IDDM and its management may trigger the expression of an eating disorder in susceptible individuals. Required dietary restraint and weight gain related to diabetes management are the factors most likely to be implicated. Eating disorders are relatively common in young women with IDDM and may contribute to impaired metabolic control with hypoglycemia and DKA, and to long-term microvascular complications of diabetes. Omission or reduction of required insulin, an extremely common means of weight control in these young women, is likely an important factor in this regard. Further research is required to determine more precisely the relationship between IDDM and eating disorders, and the effects of eating disorders on metabolic control and chronic complications of IDDM.
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PMID:Eating disorders and IDDM. A problematic association. 142 9


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