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Correlation of serum leptin and insulin levels of pregnant protein-restricted rats with predictive obesity variables BJMBR
Macêdo,G.S.; Ferreira,C.L.P.; Menegaz,A.; Arantes,V.C.; Veloso,R.V.; Carneiro,E.M.; Boschero,A.C.; Oller do Nascimento,C.M.P.; Latorraca,M.Q.; Gomes-da-Silva,M.H.G..
During pregnancy and protein restriction, changes in serum insulin and leptin levels, food intake and several metabolic parameters normally result in enhanced adiposity. We evaluated serum leptin and insulin levels and their correlations with some predictive obesity variables in Wistar rats (90 days), up to the 14th day of pregnancy: control non-pregnant (N = 5) and pregnant (N = 7) groups (control diet: 17% protein), and low-protein non-pregnant (N = 5) and pregnant (N = 6) groups (low-protein diet: 6%). Independent of the protein content of the diet, pregnancy increased total (F1,19 = 22.28, P < 0.001) and relative (F1,19 = 5.57, P < 0.03) food intake, the variation of weight (F1,19 = 49.79, P < 0.000) and final body weight (F1,19 = 19.52, P...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Low-protein diet; Pregnancy; Serum leptin; Serum insulin; Body adiposity.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000600014
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Development of the insulin secretion mechanism in fetal and neonatal rat pancreatic B-cells: response to glucose, K+, theophylline, and carbamylcholine BJMBR
Mendonça,A.C.; Carneiro,E.M.; Bosqueiro,J.R.; Crepaldi-Alves,S.C.; Boschero,A.C..
We studied the development of the insulin secretion mechanism in the pancreas of fetal (19- and 21-day-old), neonatal (3-day-old), and adult (90-day-old) rats in response to stimulation with 8.3 or 16.7 mM glucose, 30 mM K+, 5 mM theophylline (Theo) and 200 µM carbamylcholine (Cch). No effect of glucose or high K+ was observed on the pancreas from 19-day-old fetuses, whereas Theo and Cch significantly increased insulin secretion at this age (82 and 127% above basal levels, respectively). High K+ also failed to alter the insulin secretion in the pancreas from 21-day-old fetuses, whereas 8.3 mM and 16.7 mM glucose significantly stimulated insulin release by 41 and 54% above basal levels, respectively. Similar results were obtained with Theo and Cch. A more...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rat islet cell; Glucose; Pancreatic islets; Carbamylcholine; Theophylline; Potassium; Insulin secretion.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000600018
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Duodenal-jejunal bypass normalizes pancreatic islet proliferation rate and function but not hepatic steatosis in hypothalamic obese rats BJMBR
Cantelli,K.R.; Soares,G.M.; Ribeiro,R.A.; Balbo,S.L.; Lubaczeuski,C.; Boschero,A.C.; Araújo,A.C.F.; Bonfleur,M.L..
Modifications in life-style and/or pharmacotherapies contribute to weight loss and ameliorate the metabolic profile of diet-induced obese humans and rodents. Since these strategies fail to treat hypothalamic obesity, we have assessed the possible mechanisms by which duodenal-jejunal bypass (DJB) surgery regulates hepatic lipid metabolism and the morphophysiology of pancreatic islets, in hypothalamic obese (HyO) rats. During the first 5 days of life, male Wistar rats received subcutaneous injections of monosodium glutamate (4 g/kg body weight, HyO group), or saline (CTL). At 90 days of age, HyO rats were randomly subjected to DJB (HyO DJB group) or sham surgery (HyO Sham group). HyO Sham rats were morbidly obese, insulin resistant, hypertriglyceridemic and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Duodenal-jejunal bypass; Hepatic fatty acid metabolism; Hypothalamic obesity; Ki67; Insulin secretion.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000500601
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Effects of systemic administration of ciliary neurotrophic factor on Bax and Bcl-2 proteins in the lumbar spinal cord of neonatal rats after sciatic nerve transection BJMBR
Rezende,A.C.S.; Vieira,A.S.; Rogério,F.; Rezende,L.F.; Boschero,A.C.; Negro,A.; Langone,F..
Ciliary neurotrophic factor (CNTF) is a cytokine that plays a neuroprotective role in relation to axotomized motoneurons. We determined the effect of daily subcutaneous doses of CNTF (1.2 µg/g for 5 days; N = 13) or PBS (N = 13) on the levels of mRNA for Bcl-2 and Bax, as well as the expression and inter-association of Bcl-2 and Bax proteins, and the survival of motoneurons in the spinal cord lumbar enlargement of 2-day-old Wistar rats after sciatic nerve transection. Five days after transection, the effects were evaluated on histological and molecular levels using Nissl staining, immunoprecipitation, Western blot analysis, and reverse transcriptase-polymerase chain reaction. The motoneuron survival ratio, defined as the ratio between the number of...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Ciliary neurotrophic factor; Bax; Neonatal rats; Axotomy; Motoneuron; Immunoprecipitation.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008001100013
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Reduced pancreatic β-cell mass is associated with decreased FoxO1 and Erk1/2 protein phosphorylation in low-protein malnourished rats BJMBR
Rafacho,A.; Giozzet,V.A.G.; Boschero,A.C.; Abrantes,J.L.F.; Cestari,T.M.; Carneiro,E.M.; Bosqueiro,J.R..
A low-protein diet leads to functional and structural pancreatic islet alterations, including islet hypotrophy. Insulin-signaling pathways are involved in several adaptive responses by pancreatic islets. We determined the levels of some insulin-signaling proteins related to pancreatic islet function and growth in malnourished rats. Adult male Wistar rats (N = 20 per group) were fed a 17% protein (normal-protein diet; NP) or 6% protein (low-protein diet; LP), for 8 weeks. At the end of this period, blood glucose and serum insulin and albumin levels were measured. The morphometric parameters of the endocrine pancreas and the content of some proteins in islet lysates were determined. The β-cell mass was significantly reduced (≅65%) in normoglycemic but...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Β-cell mass; Insulin signaling; Low-protein diet; Pancreatic islets; Protein phosphorylation.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009001000010
Registros recuperados: 5
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