RESUMO
OBJECTIVE: We evaluated whether replacing a proportion of saturated fat with vegetable oils in the diet of young children increases trans fatty acid intake. STUDY DESIGN: Dietary counseling aimed to reach a dietary fat ratio of unsaturated to saturated fat of 2:1 within a total fat intake of 30% to 35% of energy (E%). Four-day food records of 813 3-year-old children were analyzed, and serum phospholipid fatty acid compositions of 25 randomly selected intervention children and 17 control children were analyzed. RESULTS: trans fatty acid intake of the intervention and control children was small (0.8 E% and 0.6 E%, respectively; P <.001). The relative content of serum phospholipid trans 18:1 was closely similar in intervention and control children (1.0% and 0.9% of all fatty acids, respectively). Trans fatty acid intake and serum trans 18:1 correlated poorly with children's serum cholesterol and HDL cholesterol concentrations and inversely with serum phospholipid arachidonic to linoleic acid ratio (r = -0.373). CONCLUSIONS: Trans fatty acid intake of children in Finland is minimal. Dietary intervention replacing saturated with unsaturated fatty acids is safe because it does not increase trans fatty acid intake or the relative content of trans fatty acids in the serum phospholipid fraction.
Assuntos
Colesterol na Dieta/administração & dosagem , Dieta com Restrição de Gorduras , Gorduras Insaturadas na Dieta/administração & dosagem , Gorduras na Dieta/administração & dosagem , Ácidos Graxos Insaturados/administração & dosagem , Ácidos Graxos/administração & dosagem , Fosfolipídeos/sangue , Ácido Araquidônico/sangue , Arteriosclerose/prevenção & controle , Pré-Escolar , Colesterol/sangue , HDL-Colesterol/sangue , Aconselhamento , Gorduras Insaturadas na Dieta/análise , Ingestão de Energia , Ácidos Graxos/análise , Ácidos Graxos Insaturados/análise , Finlândia , Humanos , Isomerismo , Ácido Linoleico/sangue , Prontuários Médicos , Fosfolipídeos/análise , Óleos de Plantas/administração & dosagem , Estudos Prospectivos , Fatores de RiscoRESUMO
OBJECTIVE: To investigate cholesterol-lowering efficacy and safety of plant stanol ester margarine in healthy 6-year-old children already consuming a low-saturated-fat, low-cholesterol diet. STUDY DESIGN: Eighty-one intervention children from the STRIP project, a randomized prospective trial aimed at reducing exposure of young children to the known environmental atherosclerosis risk factors, were recruited to this double-blind crossover study at 6 years of age. In randomized order the families were advised to replace daily 20 g of the child's dietary fat intake with plant stanol ester margarine or control margarine for 3 months. The washout period lasted 6 weeks. Statistical analysis was performed according to intention-to-treat principle with analysis of variance for crossover design. RESULTS: The mean daily plant stanol ester margarine consumption was 18.2 g (1.5 g plant stanol). The well-tolerated plant stanol ester margarine reduced serum total and low-density lipoprotein cholesterol concentrations by 5.4% and 7.5%, respectively (P =.0001 for both). The serum high-density lipoprotein cholesterol and triglyceride concentrations and alpha-tocopherol to low-density lipoprotein cholesterol ratio remained unchanged. The serum beta-carotene to low-density lipoprotein cholesterol ratio decreased by 19% (P =.003). CONCLUSION: Plant stanol ester margarine significantly diminishes serum total and low-density lipoprotein cholesterol concentration without adverse clinical effects in healthy children who already consume a low-saturated-fat, low-cholesterol diet but decreases the serum beta-carotene to low-density lipoprotein cholesterol ratio.
Assuntos
Colesterol/sangue , Hipolipemiantes/administração & dosagem , Lipoproteínas LDL/sangue , Margarina , Sitosteroides/administração & dosagem , Criança , Pré-Escolar , Estudos Cross-Over , Gorduras na Dieta/administração & dosagem , Método Duplo-Cego , Finlândia , Humanos , Hipolipemiantes/efeitos adversos , Lactente , Lipoproteínas LDL/efeitos dos fármacos , Margarina/efeitos adversos , Estudos Prospectivos , Valores de Referência , Sitosteroides/efeitos adversos , Fatores de TempoRESUMO
OBJECTIVE: To evaluate the contribution of the type of milk on serum cholesterol ester fatty acids in infants receiving mixed feeding, we analyzed 3-day dietary records and serum cholesterol ester fatty acid composition of 397 seven-month-old infants. STUDY DESIGN: The infants received, in addition to solid food, only one type of milk: human milk (n = 218), a ready-to-use liquid formula (n = 139), a powdered formula (n = 33), or soy formula (n = 7). RESULTS: Mean fat intakes were low and varied from 28% to 31% of energy; the milks provided 43% to 64% of the fat. The mean polyunsaturated/saturated fat ratios of solid foods were from 0.52 to 0.63 and of milks from 0.20 to 0.45. Breast-fed infants' relative serum linoleic acid (18:2n-6) concentration was low (51.2%), whereas infants fed liquid formula had low serum oleic acid (18:1n-9) in accordance with low oleic acid content in that formula. The breast-fed infants had markedly higher serum concentrations of arachidonic acid (20:4n-6) and docosahexaenoic acid (22:6n-3) than the infants fed any of the formulas. CONCLUSION: The typical fatty acid patterns of breast- or formula-fed infants were still evident in 7-month-old infants who already received 60% to 70% of their energy from solid food. Marked differences were seen also in the relative concentrations of docosahexaenoic acid and arachidonic acid despite their small contribution in cholesterol esters.
Assuntos
Aleitamento Materno , Ácidos Graxos/sangue , Alimentos Infantis/análise , Leite Humano/química , Gorduras na Dieta/administração & dosagem , Gorduras/análise , Ácidos Graxos/análise , Feminino , Humanos , Lactente , MasculinoRESUMO
OBJECTIVE: To determine the influence of gender, apolipoprotein E phenotypes, and diet on the interindividual variances in serum lipid and lipoprotein concentrations in children at 7 and 13 months of age. STUDY DESIGN: Prospective randomized intervention trial. Half of 1062 families with 7-month-old infants received dietary and lifestyle counseling aimed at partially replacing saturated fat with mono- and polyunsaturated fat and reducing exposure to other known atherosclerosis risk factors. This study comprises all trial children who at 8 months of age received, in addition to solid food, only breast milk or only formula (N = 553). Forward stepwise multiple regression analysis was used in the evaluation of the contributions of gender, apolipoprotein E phenotype, and diet. RESULTS: Apolipoprotein E phenotypes, gender, and milk type provided independent information concerning serum lipid values at 7 and 13 months of age (three-way ANOVA, p < 0.01). At 7 months, milk type was the most significant predictor of total, non-high-density lipoprotein and high-density lipoprotein cholesterol and apolipoprotein B and A1 concentrations. At 13 months when the effects of gender (5%) and apolipoprotein E type (5%) were excluded, diet predicted only 2% of the variance in serum cholesterol concentration. The apolipoprotein E type predicted 8% of the variance in non-high-density lipoprotein cholesterol concentration and 7% of the variance in apolipoprotein B concentration (p < 0.001), together explaining only 3% of the variance in serum high-density lipoprotein cholesterol and apolipoprotein A1 concentrations. CONCLUSIONS: At 7 months of age diet is an important predictor of serum lipid and lipoprotein concentrations. At the age of 13 months the apolipoprotein E phenotype significantly predicts the concentrations of serum non-high-density lipoprotein cholesterol and apolipoprotein B. However, at both ages apolipoprotein E phenotype, gender, and diet together explain only from 1.4% to 15.5% of the variance in serum lipids and apolipoproteins, suggesting that other, presumably genetic, factors are major determinants.
Assuntos
Apolipoproteínas E/genética , Arteriosclerose/prevenção & controle , Lipídeos/sangue , Análise de Variância , Apolipoproteínas E/sangue , Aleitamento Materno , Colesterol/sangue , Gorduras na Dieta , Feminino , Humanos , Lactente , Lipoproteínas/sangue , Masculino , Fenótipo , Estudos Prospectivos , Valores de Referência , Fatores de Risco , Fatores SexuaisRESUMO
Jejunal biopsy was performed without selection in 110 of 201 children with insulin-dependent diabetes mellitus; serum reticulin antibody, antigliadin antibody by enzyme-linked immunosorbent assay, and serum IgA were studied in all 201 children. Seven children had severe jejunal villous atrophy, giving a prevalence of celiac disease of at least 3.5%. Of the serum tests used, antigliadin antibody with ELISA was the most sensitive. Four patients adhered to a gluten-free diet, and their jejunal structure became normal; three had subsequent gluten provocation, and the jejunal mucosa relapsed in every one. Six had HLA-B8 and -DR3 antigens, and one had B15 and -DR4 phenotypes. In most patients, a gluten-free diet had little effect on insulin dosage, urinary excretion of glucose, or serum level of hemoglobin A1.
Assuntos
Doença Celíaca/complicações , Diabetes Mellitus Tipo 1/complicações , Anticorpos/imunologia , Doença Celíaca/dietoterapia , Doença Celíaca/patologia , Criança , Dietoterapia , Ensaio de Imunoadsorção Enzimática , Gliadina/imunologia , Antígenos HLA/genética , Humanos , Jejuno/patologia , Fenótipo , Reticulina/imunologiaRESUMO
The defect of epithelial diamino acid transport in lysinuric protein intolerance (LPI) results from an abnormality of the basolateral cell membranes. Therefore the lysine deficiency, which is one of the consequences of this defect, cannot be corrected by oral administration of lysine, either in free or peptide form. In search of useful lysine derivatives, we studied in patients with LPI the absorption after oral administration of homocitrulline and epsilon N-acetyllysine. Acetyllysine, but not homocitrulline, normalized the subnormal plasma lysine concentrations.
Assuntos
Erros Inatos do Metabolismo dos Aminoácidos/tratamento farmacológico , Citrulina/análogos & derivados , Lisina/análogos & derivados , Lisina/deficiência , Administração Oral , Adolescente , Adulto , Criança , Pré-Escolar , Citrulina/administração & dosagem , Feminino , Humanos , Lisina/administração & dosagem , Lisina/sangue , MasculinoRESUMO
Prefeeding and sequential postprandial plasma amino acid concentrations were measured in 31 healthy preterm infants with gestational ages between 33 and 37 weeks at the ages of 4 to 12 days, to characterize changes after quantitatively and qualitatively different protein loads. All infants had previously been fed with human milk. The infants received a normal feed of pooled human milk (true protein 0.8 gm/dl) or of adapted or nonadapted milk formula (protein 1.5 gm/dl) from a bottle. The concentrations of all essential and several nonessential amino acids, including arginine and ornithine, rose sharply in plasma. Glycine decreased, and alanine increased slowly. Postprandial alterations in plasma total amino acids seemed to reflect the protein content of the different milks. In preterm infants, fed at three- to four-hour intervals, plasma amino acid concentrations fluctuate continuously. Thus in long-term studies and in screening, samples should be taken immediately before feeds. Postprandial plasma amino acid measurements may prove to be a useful means for testing the infant's ability to handle the protein or individual amino acid loads in various feeds.
Assuntos
Aminoácidos/sangue , Alimentação com Mamadeira , Alimentos Infantis , Recém-Nascido Prematuro , Leite Humano , Aminoácidos/análise , Humanos , Alimentos Infantis/análise , Recém-Nascido , Proteínas do Leite/análise , Leite Humano/análiseRESUMO
In lysinuric protein intolerance, a disease resulting from an autosomal recessive disorder of diamino acid transport, citrulline, unlike arginine and lysine, is absorbed normally from the intestine. In 19 patients with LPI, the status after 2 years of treatment with citrulline or citrulline + lysine was compared with that during the preceding period of treatment with arginine. Administration of citrulline led to improved protein nutrition, as indicated by increases in daily protein intake, blood hemoglobin values, and plasma albumin and valine concentrations. Normal excretion of orotic acid indicated adequate urea cycle function. Seven of the nine stunted children had marked catch-up growth. Of four patients biopsied twice and having initially severe fatty degeneration of the liver, two had improved histology. However, hepato- and splenomegaly, and several biochemical abnormalities in the serum remained unchanged. Giving additional lysine did not enhance the favorable effect, but in some patients provoked abdominal cramps and diarrhea. Citrulline is the most valuable agent for treatment of LPI. Although not curative, it corrects the deficiency of the urea cycle intermediates and protects the patients from hyperammonemia and its consequences.