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| Ueno,M.; Bezerra,R.M.N.; Silva,M.S.; Tavares,D.Q.; Carvalho,C.R.; Saad,M.J.A.. |
| Insulin stimulates the tyrosine kinase activity of its receptor resulting in the tyrosine phosphorylation of pp185, which contains insulin receptor substrates IRS-1 and IRS-2. These early steps in insulin action are essential for the metabolic effects of insulin. Feeding animals a high-fructose diet results in insulin resistance. However, the exact molecular mechanism underlying this effect is unknown. In the present study, we determined the levels and phosphorylation status of the insulin receptor and pp185 (IRS-1/2) in liver and muscle of rats submitted to a high-fructose diet evaluated by immunoblotting with specific antibodies. Feeding fructose (28 days) induced a discrete insulin resistance, as demonstrated by the insulin tolerance test. Plasma... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Fructose; Insulin receptor; Pp185 phosphorylation. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000001200004 |
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| Bezerra,R.M.N.; Ueno,M.; Silva,M.S.; Tavares,D.Q.; Carvalho,C.R.O.; Saad,M.J.A.; Gontijo,J.A.R.. |
| Rats fed a high-fructose diet represent an animal model for insulin resistance and hypertension. We recently showed that a high-fructose diet containing vegetable oil but a normal sodium/potassium ratio induced mild insulin resistance with decreased insulin receptor substrate-1 tyrosine phosphorylation in the liver and muscle of normal rats. In the present study, we examined the mean blood pressure, serum lipid levels and insulin sensitivity by estimating in vivo insulin activity using the 15-min intravenous insulin tolerance test (ITT, 0.5 ml of 6 µg insulin, iv) followed by calculation of the rate constant for plasma glucose disappearance (Kitt) in male Wistar-Hannover rats (110-130 g) randomly divided into four diet groups: control, 1:3 sodium/potassium... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: High-fructose diet; Insulin resistance; Blood pressure; Hypertriglyceridemia; Plasma cholesterol. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000900008 |
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| Breder,J.S.C.; Pires,A.L.R.; Azevedo,F.F.; Apolinário,P.P.; Cantaruti,T.; Jiwani,S.I.; Moraes,Â.M.; Consonni,S.R.; Araújo,E.P.; Adams,G.G.; Saad,M.J.A.; Lima,M.H.M.. |
| The use of specially designed wound dressings could be an important alternative to facilitate the healing process of wounds in the hyperglycemic state. Biocompatible dressings combining chitosan and alginate can speed up wound healing by modulating the inflammatory phase, stimulating fibroblast proliferation, and aiding in remodeling phases. However, this biomaterial has not yet been explored in chronic and acute lesions of diabetic patients. The aim of this study was to evaluate the effect of topical treatment with a chitosan-alginate membrane on acute skin wounds of hyperglycemic mice. Diabetes mellitus was induced by streptozotocin (60 mg · kg-1 · day-1 for 5 days, intraperitoneally) and the cutaneous wound was performed by removing the epidermis using... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: C57BL/6J mice; Wound healing; Wound dressing; Polysaccharides; Diabetes. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000100602 |
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| Sasse,A.D.; Chen,E.; Carvalho,C.R.O.; Gontijo,J.A.R.; Brenelli,S.L.; Saad,M.J.A.. |
| Insulin stimulates the tyrosine kinase activity of its receptor, resulting in the phosphorylation of its cytosolic substrate, insulin receptor substrate 1 (IRS-1). IRS-1 is also a substrate for different peptides and growth factors, and a transgenic mouse "knockout" for this protein does not have normal growth. However, the role of IRS-1 in kidney hypertrophy and/or hyperplasia was not investigated. In the present study we investigated IRS-1 protein and tyrosine phosphorylation levels in the remnant kidney after unilateral nephrectomy (UNX) in 6-week-old male Wistar rats. After insulin stimulation the levels of insulin receptor and IRS-1 tyrosine phosphorylation were reduced to 79 ± 5% (P<0.005) and 58 ± 6% (P<0.0001), respectively, of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insulin receptor; Insulin receptor substrate; Unilateral nephrectomy; Insulin action. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001000004 |
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| Brenelli,S.L.; Campos,S.D.S.; Saad,M.J.A.. |
| Experiments were carried out in vitro with three viscous polysaccharides (guar gum, pectin, and carboxymethylcellulose (CMC)) of similar initial viscosity submitted to conditions that mimic events occurring in the stomach and duodenum, and their viscosity in these situations was compared to their actions on postprandial hyperglycemia in normal human subjects. Guar gum showed greater viscosity than the other gums during acidification and/or alkalinization and also showed larger effects on plasma glucose levels (35% reduction in maximum rise in plasma glucose) and on the total area under the curve of plasma glucose (control: 20,314 ± 1007 mg dl-1 180 min-1 vs guar gum: 18,277 ± 699 mg dl-1 180 min-1, P<0.01). Pectin, which showed a marked reduction in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Viscosity of dietary fiber; Glucose tolerance test; Insulin; Guar gum; Carboxymethylcellulose; Pectin. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001200009 |
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