Cardioprotección ejercida por rosuvastatina en corazones de rata sometidos a isquemia - reperfusión
; Hermann, Romina
; Perego, Juliana Andrea ; Penida, Marianela ; Marina Prendes, María Gabriela Otros responsables
Fecha
09/2017
Editorial
Asociación Bioquímica Argentina
Revista
Revista de la Asociación Bioquímica Argentina
Título del libro
Nombre del evento
Fecha del evento
Institución organizadora
ISSN
1515-6761
eISSN
ISBN
Idioma
Español
Tipo del evento
Clasificación temática
Palabras clave
Resumen
Introducción: El uso profiláctico de las estatinas en pacientes con riesgo cardiovascular se ha incrementado últimamente, debido a su asociación con una menor mortalidad y morbilidad, relacionada con cardiopatías isquémicas. La presente investigación tiende a esclarecer si el tratamiento con estatinas induce cambios beneficiosos para aumentar la resistencia a los daños ocasionados por la isquemia reperfusión. Objetivos: Investigar la protección ejercida por la rosuvastatina (R) en un modelo de corazón perfundido Langendorff y su relación con la regulación de la apertura del Poro de Transición de la Permeabilidad Mitoncondrial (PTPM).Materiales y métodos: Se utilizaron corazones de ratas Wistar hembras perfundidos retrógradamente. Se sometieron a 25 minutos de isquemia y 60 minutos de reperfusión (RP). Se administró R 10 minutos antes de la isquemia (R1) y durante toda la reperfusión (R2). Se determinó la respuesta funcional, la liberación de creatina kinasa, el tamaño del infarto, la capacidad de síntesis de ATP y la sensibilidad a la apertura del PTPM. Resultados: Los corazones tratados con R tuvieron una recuperación postisquémica mayor respecto del grupo C (PxF (%) a los 5 min de RP: C 6,8 ± 2,0*; R1 24,3 ± 6,0; R2 19,0 ± 6,0; PDF (%) a los 5 min de RP: C 20,0 ± 3,0**; R1 6,0 ± 1,0; R2 3,8 ± 1,5) no habiéndose encontrado diferencias entre los tratamientos previos y posteriores a la isquemia. Así mismo, en estos corazones se observó un menor daño tisular (CK (UI/g.h) durante los primeros 10 min de RP: C 60 ± 5; R1 32 ± 3; R2 28 ± 6; tamaño del infarto (% AR) C 62,0 ± 1,5; R1 41,6 ± 3,5*; R2 36,3 ± 3,2), mayor capacidad de síntesis de ATP (pmoles/μg de proteínas.min: C 1.82 ± 0,12**; R1, 8.89 ± 0,22; R2 9.30 ± 0,31) y una menor sensibilidad a la apertura del PTPM. Conclusiones: La R mejora la respuesta funcional cardíaca, asociada a una mayor preservación mitocondrial.
Introduction: The prophylactic use of statins in patients with cardiovascular risk has recently increased, due to its association with lower mortality and morbidity related to ischemic heart disease. The present investigation tends to clarify if the treatment with statins induces beneficial changes to increase the resistance to the damages caused by the ischemia reperfusion. Objectives: To investigate the possible protection exerted by rosuvastatin (R) in a Langendorff perfused heart model and its relation with the regulation of the opening of the Mitochondrial Permeability Transition Pore (MPTP). Materials and methods: Hearts from female Wistar rats were used, retrograde perfused, and subjected to 25 minutes of ischemia and 60 minutes of reperfusion (RP). R was given 10 minutes prior to ischemia (R1) or throughout reperfusion (R2). Functional response, creatine kinase (CK) release, infarct size, ATP synthesis capacity and sensitivity to MPTP opening were determined. Results: R-treated hearts had a greater postischemic recovery than the control group ((contractility (%) at 5 min of RP: control 6.8 ± 2*; R1 24.3 ± 6; R2 19 ± 6; left ventricle end diastolic pressure (%) at 5 min of RP: control 20 ± 3**; R1 6 ± 1; R2 3.8 ± 1.5), with no differences between pre-and post-ischemia treatments. Likewise, in these hearts, we observed: lower tissue damage (CK (UI/ g.w) during the first 10 minutes of RP: control 60 ± 5; R1 32 ± 3; R2 28 ± 6; infarct size (% AR) control 62.0 ± 1.5; R1 41.6 ± 3.5*; R2 36.3 ± 3.2), greater ability of ATP synthesis (pmoles/μg of proteins.min: control 1.82 ± 0.12**; R1, 8.89 ± 0,22; R2 9.3 ± 0,31) and lower sensitivity to the opening of the MPTP. Conclusions: R improves the cardiac functional response, associated with greater mitochondrial preservation.
Introduction: The prophylactic use of statins in patients with cardiovascular risk has recently increased, due to its association with lower mortality and morbidity related to ischemic heart disease. The present investigation tends to clarify if the treatment with statins induces beneficial changes to increase the resistance to the damages caused by the ischemia reperfusion. Objectives: To investigate the possible protection exerted by rosuvastatin (R) in a Langendorff perfused heart model and its relation with the regulation of the opening of the Mitochondrial Permeability Transition Pore (MPTP). Materials and methods: Hearts from female Wistar rats were used, retrograde perfused, and subjected to 25 minutes of ischemia and 60 minutes of reperfusion (RP). R was given 10 minutes prior to ischemia (R1) or throughout reperfusion (R2). Functional response, creatine kinase (CK) release, infarct size, ATP synthesis capacity and sensitivity to MPTP opening were determined. Results: R-treated hearts had a greater postischemic recovery than the control group ((contractility (%) at 5 min of RP: control 6.8 ± 2*; R1 24.3 ± 6; R2 19 ± 6; left ventricle end diastolic pressure (%) at 5 min of RP: control 20 ± 3**; R1 6 ± 1; R2 3.8 ± 1.5), with no differences between pre-and post-ischemia treatments. Likewise, in these hearts, we observed: lower tissue damage (CK (UI/ g.w) during the first 10 minutes of RP: control 60 ± 5; R1 32 ± 3; R2 28 ± 6; infarct size (% AR) control 62.0 ± 1.5; R1 41.6 ± 3.5*; R2 36.3 ± 3.2), greater ability of ATP synthesis (pmoles/μg of proteins.min: control 1.82 ± 0.12**; R1, 8.89 ± 0,22; R2 9.3 ± 0,31) and lower sensitivity to the opening of the MPTP. Conclusions: R improves the cardiac functional response, associated with greater mitochondrial preservation.
Colecciones
Aprobación
Revisión
Complementado por
Referenciado por
Licencia Creative Commons
Excepto donde se indique lo contrario, la licencia de este ítem se describe como by-nc-nd
