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Biomedical subjects

F Zurlo

Publications and source records attributed to F Zurlo.

26 records · Page 2Linked to original sources
PubMed1988

What energy level is required to avoid nutrient depletion after surgery in oropharyngeal cancer?

The rate of energy expenditure was repeatedly measured by indirect calorimetry both in the basal state (BMR) and in the resting fed state (RMR) in 8 middle-aged male patients operated for oropharyngeal cancer. In the postsurgical phase, two sequential energy levels were administered by nasogastric tube: (1) a 'maintenance' level (days 3-5) at 1.4 X measured presurgery BMR; (2) a 'supramaintenance' level (days 6-9) at 1.7 X measured BMR on day 6. Before surgery the patients had a BMR averaging (23.7 +/- 1.0 kcal/kg.day). After surgery BMR increased to 27.6 +/- 2.7 kcal/kg.day (day 6), then it decreased to 24.4 +/- 1.4 kcal/kg.day (day 10). The difference between RMR and BMR yielded a nutrient-induced thermogenesis averaging 5 +/- 1 and 8.5 +/- 2% (p less than 0.05) on levels 1 and 2, respectively. It is concluded that an energy level corresponding to 1.4 X presurgery BMR is sufficient to maintain energy and substrate equilibrium in nondepleted patients, whereas 1.7 X BMR induces positive protein and fat balances concomitant to a decrease efficiency of energy utilization.

Adult↗
PubMed1986

In vitro effects of glucidamine on adrenergic stimulated lipolysis and on lipoprotein lipase activity in human adipose tissue.

Glucidamine, a purified glycoprotein-mucopolysaccharide complex displays dose-dependent lipolytic effect on human adipose tissue in vitro. On adipose tissue lipoprotein lipase activity glucidamine exhibits an heparin-like effect in eluting the enzyme from the tissue stores to the medium of incubation. No activating effects of glucidamine on lipoprotein lipase eluted from human adipose tissue was observed.

Adipose Tissue↗
PubMed1986

Subcutaneous and visceral fat distribution according to sex, age, and overweight, evaluated by computed tomography.

Subcutaneous and visceral fat distribution as related to sex, age, and overweight was studied in 130 subjects and 10 women with Cushing's disease. Fat depots were evaluated by computed tomography at one thoracic and one abdominal level. Adipose tissue (density range - 50 to 250 Hansfield units) was highlighted and the fat areas were measured by a laser planimeter. The ratio between subcutaneous and visceral fat areas (S:V ratio) was assumed as an index. Ratios of both nonobese and obese groups were significantly higher in females than in males. Ratios decreased markedly over age 60. There was a significant inverse correlation between age and S:V ratios in females (r = 0.65; p less than 0.001) and in males (r = 0.61; p less than 0.001). Statistically significant correlations were found between S:V ratios at thoracic and abdominal levels. In Cushing's patients, the S:V ratio at the abdominal level was significantly lower than in controls matched for age, sex, and body mass index.

Adipose Tissue↗
PubMed1986

Variability of resting energy expenditure in healthy volunteers during fasting and continuous enteral feeding.

The magnitude of variability in resting energy expenditure (REE) during the day was assessed in nine healthy young subjects under two nutritional conditions: 1) mixed nutrient (53% carbohydrate, 30% fat, 17% protein) enteral feeding at an energy level corresponding to 1.44 REE; and 2) enteral fasting, with only water allowed. In each subject, six 30-min measurements of REE were performed using indirect calorimetry (hood system) at 90-min intervals from 9 AM to 5 PM. The mean REE and respiratory quotient were significantly (p less than .01) greater during feeding than during fasting (1.08 +/- 0.07 [SEM] vs. 1.00 +/- 0.06 kcal/min and 0.874 +/- 0.007 vs. 0.829 +/- 0.008 kcal/min, respectively). Mean postprandial thermogenesis was 4.9 +/- 0.4% of metabolizable energy administered. The intraindividual variability of REE throughout the day, expressed as the coefficient of variation, ranged from 0.7% to 2.0% in the fasting condition and from 1.2% to 4.1% in the feeding condition. There was no significant difference between the REE measured in the morning and that determined in the afternoon.

Adolescent↗
PubMedDate not supplied

Effects of L-carnitine supplemented total parenteral nutrition on lipid and energy metabolism in postoperative stress.

During episodes of trauma carnitine-free total parenteral nutrition (TPN) may result in a reduction of the total body carnitine pool, leading to a diminished rate of fat oxidation. Sixteen patients undergoing esophagectomy were divided randomly in two equal isonitrogenous groups (0.2 g/kg.day). Both received TPN (35 kcal/kg.day; equally provided as long-chain triglycerides and glucose) over 11 days without (group A) and with (group B) L-carnitine supplementation (12 mg/kg.day = 75 mumol/kg.day). Compared with healthy controls, the total body carnitine pool prior to the operation was significantly reduced in both groups, suggesting a state of semistarvation and muscle wasting. In group A the plasma levels of total carnitine and its subfractions (free carnitine, short- and long-chain acylcarnitine) remained stable during the study whereas in group B the total plasma carnitine concentration rose mainly due to an increase in free carnitine. In group A the cumulative urinary carnitine losses were 11.5 +/- 2.6 mmol (= 15.5 +/- 3.1% of the estimated total body carnitine pool). In group B 3.1 +/- 1.9 mmol (= 11.1 +/- 7.6%) of the infused carnitine was retained in the immediate postoperative phase until day 6, but this amount was completely lost at completion of the study period. No significant differences in the respiratory quotient or in the plasma levels of triglycerides, free fatty acids, and ketone bodies were observed, between or within the groups, before the operation and after 11 days of treatment. It is concluded that the usefulness of carnitine supplementation during postoperative TPN was not apparent in the present patient material.

Adult↗