Caracterización y cuantificación de células progenitoras endoteliales de ratas espontáneamente hipertensas alimentadas con fructosa

Authors
Lembo, Carina; Renna, Nicolas Federico; Diez, Emiliano Raúl; Vázquez Prieto, Marcela; Miatello, Roberto Miguel
Publication Year
2010
Language
Spanish
Format
article
Status
Published version
Description
Objective: To examine alterations in participation of endothelial progenitor cells (EPC) because of insulin resistance (IR) associated with an experimental model of metabolic syndrome (MS) generated by chronic administration of fructose to spontaneously hypertensive rats (SHR) Material and methods: WKY and SHR rats, male, were distributed into 4 groups (n = 8 c/u): WKY: control; FFR: WKY receiving fructose in drinking water to 10% (v/v) for 6 weeks , SHR; FFHR: SHR receiving fructose in drinking water to 10% (v/v) for 6 weeks. At the end of the protocol the following variables were determined: systolic blood pressure, biochemical variables, HOMA index, levels of EPC quantified by flow cytometry in peripheral blood and bone marrow, immunofluorescence in cell culture to identify markers CD34 and VEGFR-2, EPC colony count and NAD(P)H-oxidase activity in aortic tissue. Results: We confirmed the experimental model based on metabolic variables analyzed. A decrease in the levels of CPE, in peripheral blood and bone marrow, which becomes more important groups of animals treated with fructose was observed .In these groups there are also fewer colonies of developed EPC in cell culture and exhibit an increased levels of oxidative stress, estimated by the activity of NAD(P)H-oxidase. Conclusion: the SM caused by chronic administration of fructose in FFHR has proven to generate a decrease in the levels of CPE, as well as its functional capacity. The intracellular mechanisms that produce this phenomenon could be triggered by the degree of IR presented in this experimental model.
Objective: To examine alterations in participation of endothelial progenitor cells (EPC) because of insulin resistance (IR) associated with an experimental model of metabolic syndrome (MS) generated by chronic administration of fructose to spontaneously hypertensive rats (SHR) Material and methods: WKY and SHR rats, male, were distributed into 4 groups (n = 8 c/u): WKY: control; FFR: WKY receiving fructose in drinking water to 10% (v/v) for 6 weeks , SHR; FFHR: SHR receiving fructose in drinking water to 10% (v/v) for 6 weeks. At the end of the protocol the following variables were determined: systolic blood pressure, biochemical variables, HOMA index, levels of EPC quantified by flow cytometry in peripheral blood and bone marrow, immunofluorescence in cell culture to identify markers CD34 and VEGFR-2, EPC colony count and NAD(P)H-oxidase activity in aortic tissue. Results: We confirmed the experimental model based on metabolic variables analyzed. A decrease in the levels of CPE, in peripheral blood and bone marrow, which becomes more important groups of animals treated with fructose was observed .In these groups there are also fewer colonies of developed EPC in cell culture and exhibit an increased levels of oxidative stress, estimated by the activity of NAD(P)H-oxidase. Conclusion: the SM caused by chronic administration of fructose in FFHR has proven to generate a decrease in the levels of CPE, as well as its functional capacity. The intracellular mechanisms that produce this phenomenon could be triggered by the degree of IR presented in this experimental model.
Fil: Lembo, Carina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina
Fil: Renna, Nicolas Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas; Argentina
Fil: Diez, Emiliano Raúl. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina
Fil: Vázquez Prieto, Marcela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina
Fil: Miatello, Roberto Miguel. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina
Subject
Endothelial progenitor cells
Systolic blood pressure
Metabolic syndrome
Fructose-fed hypertensive rats
Fisiología
Medicina Básica
CIENCIAS MÉDICAS Y DE LA SALUD
Access level
Open access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/80580