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)

Methods are described for maintaining hypophysectomized rats (model for panhypopituitarism). Prolactin-secreting pituitary tumors can be induced in rats or mice by administration of estrogens; thyroid stimulating hormone-secreting tumors will occur in some mice after thyroid ablation by radioactive iodine. Estrogens in hamsters usually produce intermediate lobe tumors of the pituitary associated with hypothalamic degeneration. Sex hormone-secreting adrenal tumors can follow surgical gonadectomy in mice. Spontaneous corticoid-secreting adrenal tumors may occur spontaneously in Osborne-Mendel rats. Secretory gonadal tumors have been induced by transplantation of a gonad into the spleen of a gonadectomized host. Both secretory and non-secretory ovarian tumors can be produced by irradiation or chemical carcinogens in mice. In some mice, secretory testicular tumors can be produced by estrogen administration. Thyroid tumors can be induced in rodents by various kinds of goitrogens and irradiation. Parathyroid hyperplasia may occur with spontaneous renal disease in rats. A syndrome simulating diabetes mellitus can occur in rare strains of mice or can be induced by chemical destruction of the islets of Langerhans with alloxan.
 ...
PMID:Experimental endocrinopathies. 17 62

To investigate endocrinological changes associated with severely uncontrolled type 1 (insulin-dependent) diabetes mellitus 27 patients (19 men, eight women) with ketoacidosis or severe ketonuria (= group 1) were examined on admission and after recovery. For comparison 13 non-ketotic patients (seven men, six women), admitted for adjustment of treatment because of poor diabetic control (= group 2), and 20 healthy controls were studied. On admission, the serum testosterone levels in men were lower in group 1 (15.1 +/- 2.0 nmol l-1) (mean +/- SEM) than in group 2 (27.2 +/- 2.8 nmol l-1) (p less than 0.01) and healthy controls (20.6 +/- 2.0 nmol l-1) (p less than 0.05). During treatment the testosterone levels in group 1 rapidly rose to the control level. The serum oestradiol levels in women were low in group 1 both on admission and discharge. The serum prolactin levels were low in female patients in group 1 (119 +/- 17 mIU l-1) compared with the women in group 2 (315 +/- 75 mIU l-1) (p less than 0.05). On admission the serum cortisol levels were higher and their response to 1 mg of dexamethasone was weaker in group 1 than in group 2 and healthy controls. After recovery the serum cortisol levels fell by 15% (p less than 0.01) and the response to 1 mg of dexamethasone returned to normal in group 1. In group 1 during treatment the serum free T4 and reverse T3 levels fell, and the T3 levels rose, whereas the thyroid stimulating hormone (TSH) levels and their responses to TRH remained unchanged.(ABSTRACT TRUNCATED AT 250 WORDS)
 ...
PMID:Hormonal changes in severely uncontrolled type 1 (insulin-dependent) diabetes mellitus. 194 23

In order to evaluate effects of metabolic control on pituitary function in insulin-dependent diabetes exercise, hypoglycaemia (insulin tolerance test), thyrotrophin releasing hormone and gonadotrophin releasing hormone, tests were performed on 25 patients before (Study 1) and after 2 weeks of improved metabolic control (Study 2). Patients were sub-divided into C-peptide negative (CpN, 10 patients with no residual C-peptide secretion) and C-peptide positive (CpP, 15 patients with residual beta-cell function) groups for analysis of results. Exercise induced higher growth hormone responses in CpN patients independent of metabolic control (P less than 0.001). Thyrotrophin releasing hormone induced higher growth hormone responses in CpN patients; this response was threefold greater after improved control (P less than 0.005). Growth hormone and cortisol response to hypoglycaemia and thyroid stimulating hormone and prolactin secretion in response to thyrotrophin releasing hormone were unaffected by residual beta-cell function or metabolic control. Luteinizing hormone response to gonadotrophin releasing hormone in CpN patients was impaired and lower after improved control (P less than 0.002). The results indicate an association between residual pancreatic insulin secretory and hypothalamic/pituitary function, possibly reflecting central neurosecretion of insulin.
 ...
PMID:Effects of improved blood glucose on insulin-induced hypoglycaemia, TRH, GnRH and exercise tests in insulin-dependent diabetes. 211 47

The serum thyroglobulin (Tg) concentration was measured in 97 patients with diabetes mellitus (39 males, 58 females). Hyper Tg-nemia which exceeds the normal range (1.0-26.6 ng/ml) was observed in 10 patients (3 out of 21 cases treated with diet alone, 3 out of 50 cases treated with oral hypoglycemic agents, 4 out of 26 cases treated with insulin). There was no significant correlation between concentrations of serum Tg and triiodothyronine (T3), thyroxine (T4), fasting plasma glucose (FPG), and hemoglobin A1c (HbA1c). However, a positive correlation was observed between serum concentrations of Tg and thyroid stimulating hormone (TSH). Patients with diabetes were divided into three groups according to the mode of treatment (Group I; diet alone, n = 21, Group II; oral hypoglycemic agents, n = 50, Group III; insulin, n = 26). No significant difference in the serum Tg concentration was observed among the three groups. They were also divided into two groups; normal Tg-nemia (Group A, n = 87) and hyper Tg-nemia (Group B, n = 10). There was no difference between levels of T3, T4, FPG, and HbA1c in the two groups. The serum TSH concentration measured by double antibody RIA and two site immunoradiometric assay in Group B was significantly higher than that in Group A. These results suggest that hyper Tg-nemia in patients with diabetes could be due to the increased TSH concentration which reflects latent subclinical primary hypothyroidism in them.
 ...
PMID:Serum thyroglobulin concentration in patients with diabetes mellitus. 331 39

We studied serum TSH, pituitary TSH and alpha and beta-subunits of TSH and their messenger ribonucleic acids (mRNAs) in three models of nonthyroidal illness (NTI) in the rat, ie diabetes mellitus (1 wk after 65 micrograms streptozotocin/g BW IP), turpentine oil-injection (8 to 48 hours after after a dose of 5 microliter/g bw SC), and complete fasting for 72 hours. Euthyroid, hypothyroid (two months after thyroidectomy) and hyperthyroid rats (30 micrograms T4/d X 7, SC) were also studied for comparison. Pituitary TSH, alpha and beta subunits and serum TSH, T4, and T3 were measured by RIA. Pituitary mRNAs coding for common delta and TSH-beta subunits were determined by cytoplasmic dot hybridization technique using specific [32P]-cDNA probes. In all NTI models there were significant decreases in serum levels of TSH, T4, and T3, but no significant changes were observed in the pituitary content of TSH, and alpha and TSH-beta subunits. Hypothyroid rats had an increase in serum TSH, pituitary TSH, and pituitary TSH-beta subunit and a decrease in pituitary alpha subunit. On the other hand, hyperthyroid rats showed a decrease in serum TSH, pituitary TSH, and pituitary TSH-beta subunit, while there was no change in the alpha subunit. A significant reduction in the pituitary TSH-beta mRNA levels was observed in all NTI models and hyperthyroidism, while TSH-beta mRNA was increased in thyroidectomized rats. alpha-mRNA was increased only in the pituitary of hypothyroid rats; there was no appreciable change in the pituitary alpha-mRNA in the various other pituitary groups.(ABSTRACT TRUNCATED AT 250 WORDS)
 ...
PMID:A study of pituitary thyrotropin, its subunits, and messenger ribonucleic acids in nonthyroidal illness. 335 21

The occurrence of HLA Class II expression by thyroid (and other endocrine) epithelia in autoimmune diseases suggests that these cells may facilitate their own destruction by immunogenically presenting autoantigens. This is supported by the findings that Class II+ thyrocytes can specifically stimulate virus-specific and autoreactive T cell clones, and that Class II expression by thyrocytes correlates with the occurrence of thyroid autoantibodies. A variety of factors may contribute to the regulation of Class II expression by thyrocytes: this is induced by interferon (IFN-gamma), and is enhanced by thyroid stimulating hormone (TSH) and by tumour necrosis factor (TNF). Conversely, epidermal growth factor (EGF) suppresses the induction of Class II in thyrocytes. This complex regulation is reflected in differences in HLA-D subregion expression between patients (DR greater than DP greater than DQ). The immune-based mechanisms of thyrocyte Class II regulation are clearly applicable to the on-going disease in an infiltrated thyroid, but the possibility of nonimmune Class II induction deserves attention, particularly in identifying factors which might contribute to the initial autoimmune attack. The possible involvement of such mechanisms in autoimmunity is supported by findings in Type I diabetes in which Class II+ islet beta cells can be found in the absence of infiltration. Further evidence is provided by the observation that a proportion of thyrocytes transformed with SV40 DNA constitutively express Class II molecules. Finally, the 'activated' state of capillary endothelial cells in organs subject to autoimmune attack suggests that they may play an important role in facilitating the autoreactive infiltration of the tissues.
 ...
PMID:Thyrocyte HLA class II expression and regulation in relation to thyroid autoimmunity. 349 11

Indices of thyroid function were measured in 229 healthy term neonates at birth and at 5, 10, and 15 days of age. Results were analysed to assess whether maternal diabetes mellitus, toxaemia of pregnancy, intrapartum fetal distress, duration of labour, method of delivery, asphyxia at birth, race, sex, birthweight, birth length, head circumference, or method of feeding influenced any index. Thyroxine, the free thyroxine index, and free thyroxine concentrations at birth correlated with birthweight. Method of delivery influenced mean thyroxine and free thyroxine index values at birth and at age 5 days. Mean values of triiodothyronine, reverse triiodothyronine, thyroxine binding globulin, and thyroid stimulating hormone were not affected by any of the perinatal factors studied. Birthweight and perhaps method of delivery should be taken into account when interpreting neonatal thyroxine parameters but determination of thyroid stimulating hormone as a screen for congenital hypothyroidism in healthy term neonates circumvents these considerations.
 ...
PMID:Neonatal thyroid function: influence of perinatal factors. 397 86

Assessments were made of 945 consecutive hospital patients with regard to a relation between borderline low thyroid function (recognised by a slightly raised thyroid stimulating hormone), thyroid autoimmunity, serum cholesterol, and coronary heart disease. Men and women with a thyroid autoimmunity, serum cholesterol, and coronary heart disease. Men and women with a thyroid stimulating hormone of 4.0 mU/l or over had a higher prevalence of coronary heart disease than did age-matched controls, and this difference was significant in women. The excess of coronary heart disease was not explained by an excess of other risk factors such as a high cholesterol, hypertension, smoking, and diabetes. Women with thyroid antibodies had a slightly higher prevalence of coronary heart disease despite the unexpected finding of a lower serum cholesterol. The data point to an association between borderline thyroid function and autoimmunity and coronary heart disease which is not mediated through a raised serum cholesterol.
 ...
PMID:Borderline low thyroid function and thyroid autoimmunity. Risk factors for coronary heart disease? 727 32

The prevalence of thyroid antibodies was 2% among 53 healthy Shirazi volunteers, 3% among 30 consecutive patients with goitre, 41% among 17 patients with thyrotoxicosis and 67% among 18 consecutive patients with myxoedema. A surprising finding was that in a sub-group of 9 of the latter, a high incidence of diabetes (55%) was found and when both diseases co-existed, the prevalence of thyroid antibodies was 80% compared with 67% with myxoedema alone. Serum cholesterol was marginally lower in the goitre than the control group (P, 0.05-0.025) but when females alone were compared there was no significant difference. It was also lower in the thyrotoxic group (P, 0.0025) and higher in the myxoedema group (P, 0.0025). Serum triiodothyronine was lower in the goitre group than the controls (P, 0.0005) but again, when females alone were considered, this difference lessened (P, 0.025-0.0125). Serum thyroxine and thyroid stimulating hormone levels showed no significant differences in the goitre and control groups.
 ...
PMID:Prevalence of thyroid antibodies in Shiraz, Iran, an area with iodine deficiency. 727 18

A total of 24 subjects with type I insulin-dependent diabetes mellitus were studied. Cardiac parasympathetic function was measured by supine heart rate variability (HRV) in the respiratory frequency 0.10-0.50 Hz and the sympathetic index was measured as the ratio of HRV between 0.055 and 0.098 Hz to that between 0.004 and 0.5 Hz. Factors assessing diabetic control and complications, and factors unrelated to diabetes but possibly influencing HRV, were recorded. Association with depressed HRV was assessed with correlation, and prediction of depressed HRV was determined with multiple regression. Factors associated with depressed HRV but not independently predictive were renal dysfunction and elevated thyroid stimulating hormone. Elevated glycosylated haemoglobin was not significantly correlated with depressed HRV. Four factors (presence of diabetic retinopathy, male gender, duration of diabetes and increasing age) were significant in the regression and sufficed to predict 81% of the sample variance. The relative weights (beta) were -0.65, 0.40, -0.40 and 0.26, respectively. Supine sympathetic index was not sufficient to demonstrate sympathetic dysfunction. It is proposed that the regression model may be used to identify patients likely to have cardiac parasympathetic autonomic dysfunction.
 ...
PMID:Predicting cardiac autonomic neuropathy in type I (insulin-dependent) diabetes mellitus. 754 17


1 2 3 4 5 6 7 Next >>