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1.
Acta cir. bras ; 25(2): 132-136, Mar.-Apr. 2010. graf, tab
Article in English | LILACS | ID: lil-540487

ABSTRACT

Purpose: To evaluate the placental glycogen storage and fetal development in the pregnancy of neonatally streptozocin-induced diabetic rats and to establish relation with glycemia and insulin levels. Methods: At the birth day, 147 female rats were randomly distributed in two experimental groups: 1) Non-diabetic Group (Control, n=45) - received the vehicle; 2) Diabetic Group (STZ, n=102) - received 100 mg streptozocin/kg in neonatal period. At day 0 of pregnancy, adult female rats were included in the control group when presented glycemia below 120 mg/dL and, in the group STZ with glycemia between 120 and 300 mg/dL. At day 21 of pregnancy, blood samples were collected for glycemia and insulin determination, and placentas withdrawn for placental glycogen determination. The newborns (NB) were classified in small (SGA), appropriate (AGA) and large (LGA) for gestational age. Results: Rats STZ presented higher glycemia at days 0 and 14 of pregnancy. At end of pregnancy, rats STZ showed higher proportion of NB SGA and LGA; reduced rate of NB AGA and unaltered glycemia, insulin and placental glycogen determinations. Conclusion: Mild diabetes altered the maternal glycemia in the early pregnancy, impairing future fetal development, but it caused no alteration on insulin and placental glycogen determination, confirming that this glycemic intensity was insufficient to change glycogen metabolism.


Objetivo: Avaliar os estoques de glicogênio placentário e o desenvolvimento fetal na prenhez de ratas com diabete moderado induzido no período neonatal e relacionar com glicemia e níveis de insulina. Métodos: No dia de nascimento, foram distribuídas aleatoriamente 147 ratas em dois grupos experimentais: 1) Grupo Não-diabético (Controle, n=45) - recebeu o veículo; 2) Grupo Diabético (STZ, n=102) - recebeu 100 mg streptozocin/kg peso corpóreo. No dia 0 de prenhez, foram incluídas ratas controle que apresentassem glicemia baixo de 120 mg/dL e, no grupo STZ, com glicemia entre 120 e 300 mg/dL. No 21º dia de prenhez, amostras de sangue foram coletadas para glicemia e determinação de insulina e as placentas foram retiradas para determinação de glicogênio placentário. Os recém-nascidos (RN) foram classificados em pequeno (PIP), adequado (AIP) e grande (GIP) para idade de prenhez. Resultados: As ratas STZ apresentaram glicemias maiores nos dias 0 e 14 de prenhez. No final da prenhez, as ratas STZ mostraram maior proporção de RN PIP e GIP, taxa reduzida de RN AIP e inalteração em glicemia, insulina e na determinação de glicogênio placentário. Conclusão: O diabete moderado alterou a glicemia materna no início da prenhez, prejudicando o futuro desenvolvimento placentário e fetal, mas não causou nenhuma alteração na determinação de insulina e de glicogênio placentário, confirmando que esta intensidade de glicêmica foi insuficiente para modificar o metabolismo de glicogênio.


Subject(s)
Animals , Female , Male , Pregnancy , Rats , Diabetes Mellitus, Experimental/metabolism , Glycogen/blood , Insulin/blood , Placenta/metabolism , Pregnancy in Diabetics/metabolism , Diabetes Mellitus, Experimental/chemically induced , Pregnancy in Diabetics/chemically induced , Random Allocation , Rats, Wistar , Severity of Illness Index , Streptozocin
2.
Rev. bras. ativ. fís. saúde ; 6(2): 39-46, 2001. ilus, tab
Article in Portuguese | LILACS | ID: lil-314658

ABSTRACT

O objetivo do presente estudo foi avaliar os efeitos do treinamento físico intenso sobre parâmetros relacionados ao metabolismo de carboidratos nas condiçöes de repouso e pós-exercício em ratos. Para isso foram utilizados ratos machos jovens wistar, distribuídos em 4 grupos: sedentário repouso(SR), treinado repouso(TR), sedentário agudo(SA) e treinado agudo(TA). Os animais dos grupos TR e TA foram submetidos a seis semanas de treinamento que consistiu na realizaçäo de 4 séries de 10 saltos na piscina, suportando uma carga equivalente a 50 porcento do valor corporal, 5 vezes/semana. Ao final de 6 semanas os animais foram sacrificados nas condiçöes de repouso(SR e TR) e pós-exercício(SA e TA). Coletou-se sangue para a determinaçäo da glicose, insulina e lactato, e tecidos muscular (porçöes branca e vermelha do gastrocnêmio), cardíaco e hepático para as concentraçöes de glicogênio.Após a realizaçäo aguda de esforço, ambas as porçöes musculares apresentaram maiores concentraçöes de glicogênio no grupo T. Ambos os grupos S e T, apresentaram um aumento da glicose sérica e do lactato sangüíneo pós-exercício. Os resultados apontam um favorecimento do perfil metabólico pela açäo do treinamento, promovendo aumento das reservas glicídicas na porçäo muscular branca.(au)


Subject(s)
Animals , Rats , Exercise , Glycogen/blood , Energy Metabolism/physiology , Exercise Therapy/adverse effects
3.
Alexandria Medical Journal [The]. 1998; 40 (1): 60-73
in English | IMEMR | ID: emr-47482

ABSTRACT

Lithium [Li] is used widely in different psychiatric disorders. It has variable and inconclusive effects on glucose tolerance. The objective of the study was to examine the effects of lithium on plasma glucose [G], glucagon and insulin, and their responses to IV G in male wistar rats. Plasma G, glucagon [by RIA], insulin [by RIA], and serum Li [by flame photometry] were measured before and 30 min after IV Li chloride [4 mEq/kg] in 10 normal and 10 streptozotocin induced diabetic rats [under light ether anaesthesia]. These parameters were also determined before, at 30 and 90 min following combined IV administration of Li chloride [4 mEq/kg] and G [0.5 g/kg] in 10 normal and 10 diabetic rats. In normal rats, Li injection resulted in a significant increase in mean plasma G [55%] and glucagon [91%]. This was associated with a significant drop in mean plasma insulin [71%]. Combined Li and G administration was followed by an increase in both mean plasma G [42%] and glucagon [98%]; a further elevation was observed at 90 min. The addition of G to Li failed to alter the inhibitory effect of the latter on plasma insulin which persisted till 90 min.. In diabetic rats, mean fasting plasma G and glucagon were significantly higher than those in normal rats, while mean plasma insulin was significantly lower [p < 0.001]. Administration of Li was associated with a further significant increase in plasma G and glucagon and a decrease in plasma insulin. Addition of G to Li failed to alter the responses of mean plasma G, glucagon and insulin, when compared to Li alone. These changes did not persist at 90 min as in normal rats. Serum Li levels [basal and after Li injection] were comparable in normal and diabetic rats. We conclude that acute Li administration is associated with an increase in plasma glucose in both normal and diabetic rats. This hyperglycemia is due to accelerated glucagon and diminished insulin secretion


Subject(s)
Animals, Laboratory , /chemically induced , Rats , Lithium/blood , Blood Glucose/analysis , Insulin/blood , Glycogen/blood
5.
Rev. bras. biol ; 51(1): 211-4, fev. 1991. tab, ilus
Article in English | LILACS | ID: lil-113698

ABSTRACT

Extensöes de sangue periférico de aves (macho e fêmea), foram submetidas a um estudo topoquímico que permitiu as seguintes conclusöes: com o PAS, a presença de glicogênio nos trombócitos e alguns heterófilos; com o azul de bromofenol (proteína) positividade em todos os elementos celulares, com intensa reatividade da regiäo equatorial dos grânulos fusiformes de heterófilos; com o método da orto-toluidina-água oxigenada (mieloperoxidase), reatividade discutível nos polimorfonucleares e negativa nos demais tipos de células e com Sudan black (lipídios) uma positividade em alguns heterófilos, eosinófilos e monócitos


Subject(s)
Animals , Blood Cells/chemistry , Chickens , Histocytochemistry/methods , Azo Compounds , Glycogen/blood , Lipids/blood , Periodic Acid-Schiff Reaction , Peroxidase/blood , Proteins/blood
7.
Indian J Physiol Pharmacol ; 1975 Apr-Jun; 19(2): 86-9
Article in English | IMSEAR | ID: sea-108090

ABSTRACT

Changes in blood levels of Glucose, Pyruvic acid, Lactic acid, Glycogen, Free Fatty Acids and total Serum Cholesterol have been studied in normal healthy human adults under the effect of mental stresses of pre-examination tension and pre-operative apprehension. A highly significant rise in all the parameters was noted.


Subject(s)
Blood Glucose/analysis , Cholesterol/blood , Educational Measurement , Fatty Acids, Nonesterified/blood , Female , Glycogen/blood , Humans , Lactates/blood , Lipids/blood , Male , Pyruvates/blood , Stress, Psychological , Surgical Procedures, Operative
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