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Biomedical subjects

T M Hayes

Publications and source records attributed to T M Hayes.

At least 55 records · Page 3Linked to original sources
PubMed1981

Comparative study of subcutaneous, intramuscular, and intravenous administration of human insulin.

Human insulin derived from porcine insulin was given subcutaneously (s.c.), intramuscularly (i.m.), and intravenously (i.v.) to normal men. The dosage for all three routes was 0 . 075 IU/kg body weight. Diluting medium was administered by s.c. injection to obtain control values. Somatostatin (100 microgram/h) was given to inhibit pancreatic beta cell secretion. The plasma glucose responses to s.c. injection of this insulin into the anterior abdominal wall and to i.m. injection into the thigh were similar with respect to the extent, onset, and duration of effect. Plasma glucose fell from mean (+/- SE) pre-injection values of 4 . 3 +/- 0 . 15 and 4 . 4 +/- 0 . 27 mmol/l, to 3 . 06 +/- 0 . 25 and 2 . 98 +/- 0 . 16 mmol/l by 90 to 105 min for s.c. and i.m. studies, respectively, thereafter returning to mean basal level by 6 h after i.m. injection, but remaining about 0 . 5 mmol/l below basal level after s.c. injection. A much more sudden, but short-lived, hypoglycaemic response occurred after i.v. insulin, with plasma glucose failing from 4. 50 +/- 0 . 42 to 1 . 45 +/- 0 . 16 mmol/l by 25 min, returning to mean basal value after 3 1/2 h. The mean (+/- SE) peak insulin levels after s.c. and i.m. injection were 0 . 13 +/- 0 . 01 and 0 . 18 +/- 0 . 04 pmol/ml at 90 and 60 min, respectively. After i.v. injection the maximum plasma insulin concentration of 6 . 9 +/- 0 . 73 pmol/ml was seen at 2 min. No adverse side-effects were observed.

Adult↗
PubMed1981

Human insulin: study of safety and efficacy in man.

The safety and efficacy of a new highly purified neutral soluble human insulin produced by conversion of porcine insulin was compared with a highly purified neutral soluble porcine insulin in six normal men. The insulins were administered by subcutaneous injection at a dose of 0.075 U/kg body weight. Somatostatin was infused during the experiment to suppress endogenous insulin secretin. No difference was found in the plasma glucose, insulin, or metabolite responses. Thus the potency, onset, and duration of effect were identical with the two insulins. No short-term side effects to either insulin were observed. Highly purified, semi-synthetic human insulin offers a safe and effective means to explore the possible advantages of homologous human insulin in the management of diabetes mellitus.

Adult↗
PubMed1981

A randomised controlled trial of the effect of low fat diet advice on dietary response in insulin independent diabetic women.

Type 2 (insulin independent) diabetic women were randomly allocated to receive advice for low fat diets or low carbohydrate diets. By 24 h weighted dietary intakes before and after a mean interval of six months, patients in the low fat group had reduced their fat intake from 41% to 31% of total energy, while carbohydrate percentage of total energy intake increased from 38% to 46%. Percentage energy intake from fat and carbohydrate in the control group remained unchanged. Body weight fell in both groups especially for patients in the low fat group who were obese (weight/height2 greater than or equal to 28 kg/m2). Mean plasma glucose, HbA1, and triglycerides were unchanged. Mean plasma total cholesterol fell significantly in the low fat group compared with the controls (p less than 0.001), but there was no significant difference in the small reduction of high density lipoprotein cholesterol observed in both groups. Thus, adherence to low fat diets occurred without deterioration of diabetes and with benefit for weight and total cholesterol.

Adult↗
PubMed1981

Candidal infections and populations of Candida albicans in mouths of diabetics.

The prevalence of oral candidosis and the frequency of isolation of Candida albicans and its density and distribution have been determined in the mouths of 50 patients with diabetes mellitus and 50 healthy volunteers matched for age, sex, dental status and smoking habits. Three of the diabetic patients were found to have a chronic oral candidosis. According to an imprint culture technique, the oral carrier rate and density of C albicans were both higher in the diabetic group as a whole than in the control subjects. Smoking was associated with an increased prevalence of the yeast in diabetes mellitus. Diabetics wearing dentures had higher candidal density than those without a prosthesis. No differences in candidal status could be detected according to the degree of control of diabetes, mode of treatment, duration of diabetes or the patient's age. Local factors such as smoking and the presence of dentures, particularly when worn continuously, interact with diabetes mellitus in promoting candidal colonisation of the mouth. Attention to these predisposing factors could reduce the incidence of thrush in diabetics.

Adolescent↗
PubMed1978

Oxygen availability from the blood and the effect of phosphate replacement on erythrocyte 2,3-diphosphoglycerate and haemoglobin-oxygen affinity in diabetic ketoacidosis.

Eleven patients with diabetic ketoacidosis were given intravenous phosphate in doses (mean 118 mmol; range 83--320 mmol) adequate to maintain normal plasma phosphate, in addition to a standard treatment regime. Prevention of hypophosphataemia stimulated recovery of the initially low red-cell 2,3-diphosphoglycerate concentrations (10.6 +/- 5.8 (SD) mumol/g Hb) after twenty-four hours. In ten control patients (initial concentration 8.1 +/- 4.4 mumol/g Hb) treated without phosphate replacement, significantly lower red-cell 2,3-diphosphoglycerate concentrations were found between 2 and 6 days after admission (forty-eight hour value for control patients 14.6 +/- 1.6 and for phosphate-treated patients 18.9 +/- 4.1 mumol/g Hb; p less than 0.01). However, no effect on in vivo p 50 or on the availability of oxygen from the blood resulted from the higher 2,3-diphosphoglycerate levels. Maintenance of normal plasma phosphate levels by intravenous phosphate is, therefore, not indicated to improve tissue oxygenation in diabetic ketoacidosis.

Adolescent↗
PubMed1978

Adipose tissue cellularity: effect on insulin and thyroxine.

The influence of insulin and thyroxine on the cellularity of adipose tissue in the rat epididymal fat pad has been studied. Incorporation of (3H) thymidine into the DNA of fat cells and stroma was measured together with fat cell size and number in rats pre-treated with either one of these hormones. There was an increase in fat pad weight in insulin treated rats which was due to 'lipid filling' of existing adipocytes and not increased proliferation of new fat cells. Thyroxine treated rats showed a decrease in fat pad weight caused by a decrease in size of individual fat cells. Cell number remained unaffected by either treatment.

Adipose Tissue↗
PubMed1975

Register of newly diagnosed diabetic children.

In November 1972 the British Diabetic Association sponsored a register to which notification was invited of all new cases of diabetes occurring in children aged 0-15 years in Great Britain and Ireland. More than 2000 cases were notified in the first two years. Notification suggested that there was a minimum yearly incidence of 7-67 cases per 100 000, though incidences varied from year to year and by geographical area. Several reports of simultaneous onset of diabetes in sibs of different ages provided evidence of clustering. A seasonal variation in incidence was found in children aged 5-15 years with peaks in the autumn and winter. The age distribution was bimodal with a main peak at about 11 years and a secondary peak at about 5 years. The sex ratio showed a male excess from 0-4 years and from 11-15 years and a female excess from 5-10 years. Overall there were slightly more male cases. Altogether 11% of patients had a first-degree relative with diabetes. The register and several investigations based on it will continue.

Adolescent↗
PubMed1975

The effect of age on deoxyribonucleic acid synthesis in rat adipose tissue.

1. Rats of four different age groups were injected intraperitoneally with labelled thymidine and killed 1, 7 or 12 days later. 2. The epididymal fat-pads were separated into fat-cells and stromal elements by collagenase digestion. 3. The incorporation of labelled thymidine into the deoxyribonucleic acid (DNA) of both fractions was greatest in the 6-week-old animals. Uptake was significantly decreased in 12- and 15-week-old animals and was lowest in 22-week-old rats.

Adipose Tissue↗