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Biomedical subjects

M Barrionuevo

Publications and source records attributed to M Barrionuevo.

46 records · Page 3Linked to original sources
PubMed1989

Nutritive utilization of phosphorus in the rat: influence of intestinal resection and dietary medium chain triglycerides and vitamin D3.

The effects of intestinal resection and diet on the digestive and metabolic utilization of phosphorus were studied in adult rats from which 50% of the distal small intestine had been removed and in sham-operated controls. Metabolic parameters were measured both 1 and 3 months after surgery. The loss of half of the distal small intestine led to a decline in digestive utilization of phosphorus 1 month after surgery as reflected in bone mineral content. Digestive efficiency had improved by 3 months after surgery. One month's feeding with a diet in which fat was provided as equal parts of medium chain triglycerides, sunflower seed oil and olive oil instead of 100% olive oil enhanced phosphorus absorption and retention, although this improvement was less evident after 3 months. The negative effects of distal small intestine resection on the nutritive utilization of phosphorus were not only palliated but significantly enhanced by supplementing the diet with vitamin D3 at a rate of 0.08 mg/100 g diet. This dose is within physiological limits, and favors phosphorus deposition in bone tissue.

Animals↗
PubMed1989

Influence of an inhibitor of monoaminooxidase (nialamide) on the serum levels, urinary excretion and plasma clearance of urea, uric acid and creatinine in adult and growing rats.

Serum levels, urinary excretion and plasma clearance of urea, uric acid and creatinine were studied in adult (230 g) and growing (75 g) rats under the influence of nialamide (an IMAO) administered in daily doses of 20 mg/100 g diet during 15 or 30 days in adults and 10 mg/100 g diet during 15 days in growing rats. A pair feeding design was used in both ages. Serum levels of urea rose in adult rats fed nialamide for 30 days while urinary excretion decreased. No change in serum levels were noted in growing rats although urinary excretion showed a net increase. Serum uric acid levels were increased in adult female rats given nialamide for 30 days, while urinary excretion fell in both sexes. Growing rats showed a drop in urinary excretion of uric acid. Serum creatinine levels were unchanged in adult and growing rats after treatment with nialamide, although a marked increase was recorded in urinary excretion in both groups.

Age Factors↗
PubMed1987

Influence of an inhibitor of monoaminooxidase (nialamide) on the absorption and retention of nitrogen in adult rats.

A study was made on adult rats (170 g) of the effect of nialamide (20 mg/100 g of diet), an inhibitor of monoaminooxidase, administered for 15 or 30 days (short or long-term, respectively), with food intake controlled (pair fed), on the absorption and retention of nitrogen, and on the nitrogen content in the liver, the gastronemio and longissimus dorsi muscles and in the small intestine. Nialamide administered for a time which can be considered prolonged (30 days) negatively affects absorption of alimentary protein, while metabolic utilization is reduced when the drug is administered both in the short and the long term. Proteic catabolism is less marked in male rats, due to the hormonal anabolizant situation in this sex. Nitrogen content under the effect of nialamide showed no significant variation in the gastronemio muscle or in the small intestine. There is a clear reduction in the longissimus dorsi muscle and an increase in the liver of those animals of both sexes treated with the drug, with the exception of male rats given nialamide in the long term.

Animals↗
PubMed1987

Comparative study of the influence of an inhibitor of monoaminooxidase (nialamide) on the calcium and phosphorus metabolism in slow and fast-growing rats.

Nialamide was supplied to slow-growing animals in doses of 20 mg/100 g of diet for 15 or 30 days. The dose for fast-growing animals was 10 mg/100 g of diet. The digestive utilization of calcium and phosphorus decreases significantly when adult slow-growing rats receive the drug for 30 days. This fall is already important in fast-growing rats when they receive nialamide for only 15 days. In the same way the falls in the retention of calcium and phosphorus in adult rats are only evident when the period of treatment is through 30 days, even females being in negative balance of phosphorus. The amount of calcium retained decreases significantly in fast-growing rats and so does phosphorus impressively after only 15 days of treatment.

Animals↗
PubMed1985

Study of absorption and retention of nitrogen in fast growing rats--II. Influence of IMAO (nialamide).

A study was made in fast growing rats (65 g) of the nutritive effects of protein and the effect on different organs when influenced by nialamide (IMAO), administered at a dosage of 10 mg/100 g diet, with food intake controlled (pair fed). The administration of nialamide reduces the protein absorbed and retained to a significant degree, both in males and females. No difference was observed between the sexes caused by the effect of the drug, due to the absence of the hormonal anabolizant situation caused by testosterone in adult rats. The administration of nialamide does not significantly modify nitrogen content per 100 g of body weight in any of the organs studied, with the exception of the longissimus dorsi.

Animals↗
PubMed1980

[Intestinal resections in rat: influence on protein absorption (author's transl)].

The effect of resections of 50% and 80% of small intestine, starting from the ileocecal valve on the nutritive utilization of protein, has been studied in rats. As a result of the resections, in the second week after the operation, the intake and weight of the animals decreased in both kinds of resections. The biggest decrease occurred in rats with 80% resection, while the loss of nitrogen in the faeces was greatly increased and, as a result, the digestibility coefficient was significantly reduced. The resected animals tended to recover gradually, but it was hardly noticeable at six and nine weeks after the operation. However, after three months, the recovery, although not total, was quite obvious, and the recovery rate was greater in the rats with 50% than in those with 80% resection.

Animals↗
PubMedDate not supplied

[Nutrition surveys in children attending kindergartens in the city of Cordoba].

A nutritional inquest was carried out in 1857 children attending kindergartens in Córdoba, Argentina, in 1974. Determinations were made for the socioeconomical level each child belonged (NES) and clinical and anthropometric examinations. Nutritional inquests were carried out in 414 of these children, psychological examinations in 51, and biochemical inquests in 61 children.

Argentina↗