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Sildenafil Stops Progressive Chamber, Cellular, and Molecular Remodeling and Improves Calcium Handling and Function in Hearts With Pre-existing Advanced Hypertrophy due to Pressure-Overload
i thought this was interesting... sure it's just rats/mice/whatever..
does anyone know the effect in humans?
SIL (viagra) arrested further progressive chamber dilation, dysfunction, fibrosis, and molecular remodeling, increasing myocardial protein kinase G activity. Isolated myocytes from TAC-SIL hearts displayed greater sarcomere shortening and relaxation, and enhanced Ca[SUP]2+[/SUP] transients and decay compared to non-treated TAC hearts. SIL treatment restored gene and protein expression of sarcoplasmic reticulum Ca[SUP]2+[/SUP] uptake ATPase (SERCA2a) phospholamban (PLB), and increased PLB phosphorylation (S16) ? consistent with improved calcium handling. Both the phosphatase calcineurin (Cn) and protein kinase C-α (PKCα) can lower pPLB and depress myocyte calcium cycling. Cn expression and PKCa activation (outer membrane translocation) were enhanced by chronic TAC, and reduced by SIL treatment. PKCδ and PKCε expression also rose with TAC but were unaltered by SIL treatment.
i thought this was interesting... sure it's just rats/mice/whatever..
does anyone know the effect in humans?
SIL (viagra) arrested further progressive chamber dilation, dysfunction, fibrosis, and molecular remodeling, increasing myocardial protein kinase G activity. Isolated myocytes from TAC-SIL hearts displayed greater sarcomere shortening and relaxation, and enhanced Ca[SUP]2+[/SUP] transients and decay compared to non-treated TAC hearts. SIL treatment restored gene and protein expression of sarcoplasmic reticulum Ca[SUP]2+[/SUP] uptake ATPase (SERCA2a) phospholamban (PLB), and increased PLB phosphorylation (S16) ? consistent with improved calcium handling. Both the phosphatase calcineurin (Cn) and protein kinase C-α (PKCα) can lower pPLB and depress myocyte calcium cycling. Cn expression and PKCa activation (outer membrane translocation) were enhanced by chronic TAC, and reduced by SIL treatment. PKCδ and PKCε expression also rose with TAC but were unaltered by SIL treatment.