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Biomedical subjects

D Costagliola

Publications and source records attributed to D Costagliola.

At least 127 records · Page 7Linked to original sources

Insulinemic and glycemic indexes of six starch-rich foods taken alone and in a mixed meal by type 2 diabetics.

The glycemic index concept neglects the insulin secretion factor and has not been systematically studied during mixed meals. Six starch-rich foods were tested alone and in an isoglucido-lipido-protidic meal in 18 NIDDs and compared with a glucose challenge. These test meals were randomly assigned using a three factor experiment design. All three tests contained 50 g carbohydrate; mixed meals were adjusted to bring the same amount of fat (20 g), protein (24 g), water (300 mL), and calories (475 kcal) but not the same amount of fiber. Whatever the tested meals, foods elicited a growing glycemic index hierarchy from beans to lentils, rice, spaghetti, potato, and bread (mean range: 0.21 +/- 0.12-92 +/- 0.12, p less than 0.001). Mixing the meals significantly increased the insulinemic indexes (p less than 0.05) and introduced a positive correlation between glycemic and insulinemic indexes (n = 6, r = 0.903; p less than 0.05). The glycemic index concept remains discriminating, even in the context of an iso-glucido-lipido-protidic meal. Insulinemic indexes do not improve discrimination between foods taken alone in type 2 diabetics: they only discriminate between foods during mixed meals, similarly to glycemic indexes.

Adult↗

Modifications of hemato-biological parameters in pregnant women in a migrating population in northern Cameroon: prevalence of anemia, iron and folates deficiencies.

The wholesale displacement of a population can have nutritional consequences for the migrants. With this in mind, the prevalences of anemia and of iron and folic acid deficiencies were studied in a group of 90 pregnant women living in northeast Benoue, an area situated in northern Cameroon where a development project was initiated in 1973. This project aimed at moving a population from the extreme northern highlands to the fertile valley of the Benoue. The following hemato-biological parameters were measured: hemoglobin, hematocrit, mean cell hemoglobin concentration, plasma iron, transferrin saturation, serum concentrations of folates, prealbumin, transferrin, protides and their fractions. The investigation showed that anemia, as well as iron and folic acid deficiencies, were rare when using World Health Organization criteria. The anemia prevalence, judged on a hemoglobin level of less than 11 g per 100 ml, is 8%, iron deficiency prevalence is 10% (plasma iron level below 50 micrograms per 100 ml), and folic acid deficiency prevalence is 3% (serum folic acid level below 3 ng per ml). However, 40% of the pregnant women had a level of transferrin saturation below 15%. In non deficient subjects, we observed a decrease between the first and second trimesters of pregnancy in hemato-biological parameters linked to anemia or to nutritional status (hemoglobin, hematocrit, plasma iron, transferrin saturation, prealbumin). The nutritional conditions in the area appeared sufficient to prevent deficiencies which are frequently observed in pregnant women in Africa.

Anemia↗

Sucrose or honey at breakfast have no additional acute hyperglycaemic effect over an isoglucidic amount of bread in type 2 diabetic patients.

Exclusion of simple sugars from the diabetic diet is not always followed by patients and may not even be as crucial as was hitherto thought. We tested three types of mixed breakfasts (400 kcal, 50 g HCO) including an isoglucidic amount either of white bread (30 g), honey (20 g) or sucrose (15 g), at the critical morning period i.e. for breakfast, in a group of 21 Type 2 (non-insulin-dependent) diabetic patients (6 well- and 15 badly controlled). Mean plasma glucose and insulin levels were comparable on the three occasions: respectively with bread, sucrose and honey, peak glucose values were 18 mmol/l, 17.7 mmol/l and 17.5 mmol/l in the uncontrolled group versus 13.9 mmol/l, 12.8 mmol/l and 12.7 mmol/l in the well-controlled group. Peak insulin values were 33.6 mU/1,34.0 mU/l and 36.3 mU/l (p greater than 0.05) in uncontrolled patients against 57.5 mU/l, 54.8 mU/l and 52.5 mU/l in well-controlled subjects (p greater than 0.05). The mean increment in peak plasma glucose values for the three breakfasts was as follows: 6.9 mmol/l, 6.3 mmol/l and 6.2 mmol/l for the uncontrolled group against 7.2 mmol/l, 5.9 mmol/l and 6.2 mmol/l in well-controlled subjects; the mean increment in peak plasma insulin levels was 21.8 mU/l,22.0 mU/l and 24.2 mU/l in the controlled group versus 38.2 mU/l, 32.0 mU/l and 34.7 mU/l in the well-controlled subjects, all values being non-significantly different (p greater than 0.05). We conclude that, in acute conditions, simple sugars have no additional hyperglycaemic effect over an isoglucidic amount of bread in well-and in badly controlled Type 2 diabetic patients, even at breakfast.

Adult↗

Rotation of the cell nucleus in living cells: a quantitative analysis.

Nuclear rotation is observed in a variety of cell types. However, few quantitative analyses are reported and the significance of this phenomenon is still unclear. To investigate this type of nuclear movement, we performed a quantitative analysis in mouse L-929 fibroblasts, a cell line chosen since it displays a high nuclear rotational activity. Analyses were performed using time-lapse microcinematography. The relationship between nuclear rotation and other cellular phenomena such as the cell cycle and locomotion were studied. Then, we investigated the rotation in a population of sister cells to study whether it is genetically determined. Finally, we performed a qualitative analysis of nuclear rotation in different cultured cell lines. Results show that nuclear rotations preferentially occur during the phases of the cell cycle which surround mitosis.

Animals↗

Sucrose taken during mixed meal has no additional hyperglycaemic action over isocaloric amounts of starch in well-controlled diabetics.

The hyperglycaemic effect of 20 g sucrose taken at the end of a regular mixed meal by diabetic patients was measured in six adult type 1 diabetics, C-peptide negative, controlled by the artificial pancreas, and twelve adult type 2 diabetics, with fasting plasma glucose levels below 7.2 mmol/l (130 mg/100 ml) and post-prandial plasma glucose levels below 10.0 mmol/l (180 mg/100 ml), treated by diet alone or with glibenclamide and/or metformin. All the patients were given on consecutive days, in random order, two mixed meals of grilled meat, green beans, and cheese, as well as a cake made either of rice, skimmed milk, and saccharine (meal A) or rice, skimmed milk, and 20 g sucrose (meal B). The meals contained equal amounts of calories and of carbohydrate. There was no difference between the meals in plasma glucose curves and plasma insulin or insulin infusion rate variations whether in peak values, peaking times, or areas under the curves, in either group of patients. Sparing use of sucrose taken during mixed meals might help well-controlled diabetic patients to comply with their daily dietary prescription while maintaining good blood glucose control.

Adult↗

In situ arrangement of nor-bearing chromosomes in the interphase nucleus of Aotus trivirgatus.

The spatial organization of the two nucleolus-organizing region (NOR)-bearing chromosomes during interphase was studied in Aotus trivirgatus fibroblasts, using nucleoli as ultrastructural markers. Their distribution was examined by measuring the distances between them in 30 reconstructed nuclei, and comparing these experimental values with the theoretical ones obtained by simulation. Results were as follows: (1) the nucleoli are arranged in a polarized manner inside the nucleus; (2) the nucleoli are tightly bound to the nuclear envelope at two opposites sites; (3) the distance between the two nucleoli is variable, and is shorter than it would be if the two nucleoli were distributed at random. These findings indicate that the NOR-bearing chromosomes are fixed at the nuclear envelope in two opposite areas. They are also consistent with the hypothesis that each chromosome occupies a separate domain inside the nucleus. They can be interpreted according to the model in which chromosome arrangement within the interphase nucleus is based on the separation of the diploid complement into two independent haploid sets.

Animals↗

[Retirement, psychological well-being and health: longitudinal study of a population of Parisian executives].

A longitudinal study was carried out on a sample of 155 french male managers in order to test the hypothesis that retirement has negative effects on health and life satisfaction in upper white-collar workers. At wave 1 (in 1976) of the study, these 155 managers were all working full time. At wave 2 (in 1979), 105 were retired and 50 were still working full time. Results from the comparison of these two groups do not support this hypothesis. On the other hand, the data suggest that some psychological factors assessed at wave 1 are, independently of retirement, significantly related to changes occurred in health and life satisfaction between the two waves of the study.

Administrative Personnel↗

The risk of diabetic control: a comparison of hospital versus general practice supervision.

Two groups of insulin-treated outpatients (one followed up at the Hotel-Dieu Hospital and the second mainly supervised by general practitioners) were chosen at random in 1978. The two populations were comparable in age, age at diagnosis, sex, level of education, overall activity and socio-professional and economic status. Outpatients followed up in the diabetic unit had better blood glucose control, with about the same number of hypoglycaemic reactions as patients followed up in general practice. This better control was associated with more social activity and less visits to the physician, despite the fact that patients attending the hospital spent more money on their diet and had more daily insulin injections. All these differences remain significant after adjustment for the duration of diabetes. It may be inferred that attempts to improve control in insulin-treated patients are associated with a more active life and with no increase in the frequency of hypoglycaemic reactions.

Blood Glucose↗

Cellular proliferation in the spleen of DBA/2 mice infected with a myeloproliferative sarcoma virus(MPSV).

Cellular proliferation kinetics were investigated in the spleens of DBA/2 mice infected with a myeloproliferative sarcoma virus (MPSV) at three distinct phases of spleen growth: the rapid-growth phase, the slow-growth phase and the regression phase. Using injection of tritiated thymidine in vivo and autoradiographic techniques, we showed that most blast cells proliferate rapidly (cell cycle is equal to 10 h) even during the slow-growth phase. Very massive and rapid cell loss was found during the rapid-growth phase (cell loss factor phi = 80%). By comparing the decrease in specific splenic activity after in vivo injection of 125IUdR and 3HTdR, we were able to show a large reutilization of tritiated thymidine (R = 57%), visible less than 7 h after injection of isotopic DNA precursors. Thus, MPSV-infected spleen cells were shown, for the most part, to be short-lived cells: almost one-half mature into erythrocytes and the others rapidly die in situ.

Animals↗

[Adaptation to life events: its measure and effect upon health. A review from 1975 to 1978 (author's transl)].

Results which appeared since 1975 concerning the measure of adaptation to life events and its possible relation with health status are analysed. A part of research is devoted to determining good measures of this adaptation. The research workers agree on the use of scales built from lists of varying events weighted according to the principles described in the article. With regard to the association of these events with health, this review confirms the positive results obtained in the case of some unique severe events, and the imprecise results in the case of events taken together and requiring a more complex adaptation. From the point of view of the epidemiologist, we make three inferences: retrospective studies should be avoided, distinction between mental health and physical health should be deemphasized, studies of adaptative life events should be pursued individually rather than as a whole.

Adaptation, Psychological↗

Lifelong variations in heart rates in SPF Sprague Dawley rats of both sexes. Statistical correlations with body weights.

In unanesthetized Sprague Dawleys, SPF, of both sexes, housed in DL12:12 (100lux), at a temperature of 18--23 degrees C and a hygrometry of 60--75%, the measurements of heart frequencies during most part of their life point out a continuous decrease with age and an always higher (40--20 c.min-1) heart rate in females than in males. Significant correlations between heart rate and body weight can account for these heart rates variations. Between the ages of 72 and 589 days, which corresponds to the growth period, a linear relationship was established between Log heart rate (y; c. min-1) and Log body weight (x; gram); for males: Log y = 0.122 Log X +Log 938 and for females: Log y = -0.166 Log X + Log 1217. After the age of 600 days, which corresponds to senescence, decreases in heart rate as well as in body weight were observed in both sexes.

Age Factors↗

Incubation time for AIDS.

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Acquired Immunodeficiency Syndrome↗

A rational attitude toward serum alanine aminotransferase measurement by blood banks, based on a longitudinal study of a cohort of repeat blood donors.

A cohort of 879 blood donors was followed over a 3-year period. Of the 3858 units of blood collected, 112 (2.9%), obtained from 64 donors, had an alanine aminotransferase (ALT) activity over 45 IU per L; of these, 39 had a single ALT elevation. The incidence of ALT increase was 2.01 per 100 units, or 5.1 per 100 donors, per year. The pattern of elevated ALT was followed in 72 donors, 54 of whom were from the 64 cited above. At the second blood donation (BD2), about 5 months later, 62.5 percent had a normal ALT value, and most (91%) retained those values at blood donation 3 (BD3). However, 19 (70.3%) of the 27 whose ALT levels had not returned to normal at BD2 had an increased value at BD3. These results led to the formulation of the following algorithm to improve the management of blood donors; at the first donation, the ALT assay is done after the blood collection, but, at the next donation, the ALT level is measured before donation if the preceding ALT activity had been abnormal. If ALT is elevated, blood is not collected. Three consecutive ALT elevations are a criterion for permanent exclusion of the donor.

Alanine Transaminase↗

Telephone versus face to face interviewing as a means of collecting data relevant to the management of diabetes among general practitioners in France: a randomized design.

Successful patient education requires planed programs with specific target populations. As general practitioners see 85% of noninsulin-dependent diabetics in France, this study was designed to test the feasibility of the telephone as a method for data collection within the context of a random sample of general practitioners in the Paris region. In addition, data were collected assessing physician's perceptions of various barriers and facilitators to the management of this illness. The study demonstrated the feasibility of phone interviews among general practitioners, as no significant differences were found in response rates or for any single variable collected on the telephone versus "face-to-face". Treatment patterns were described and results indicated that 77% of general practitioners agreed to participate in a subsequent study and, of these 93% agreed to the participation of their noninsulin-dependent patients.

Data Collection↗