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Mike Webster

What is the main mechanism of action Sacubitril/Valsartan?

Chuck Smallman  Follow

New data: post hoc secondary analysis of 8399 patients from the Prospective Comparison of ARNI With an ACE-Inhibitor to Determine Impact on Global Mortality and Morbidity in Heart Failure (PARADIGM-HF) trial.
In patients with heart failure with reduced ejection fraction, sacubitril/valsartan significantly improved nearly all KCCQ physical and social activities compared with enalapril, with the largest responses in household chores and sexual relationships. In addition to reduced likelihood of cardiovascular death, all-cause mortality, and heart failure hospitalization, sacubitril/valsartan may improve limitations in common activities in these patients.
Article Effects of Sacubitril/Valsartan on Physical and Social Activ...


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Bunny97  Follow




Interesting data recently published about mechanisms of sacubitril.
The molecular mechanisms of Valsartan are strongly associated with the prevention of hypertrophy. In contrast, Sacubitril acts by preventing the breakdown of endogenous vasoactive peptides, including natriuretic peptides (ANP, BNP, and CNP), thereby limiting myocardial cell death. In the combination drug, molecular synergy may reverse or reduce left ventricular extracellular matrix remodeling (LVEMR), reduce cardiomyocyte cell death, and, via Valsartan, enhance the effects of Sacubitril. Remarkably, the molecular mechanisms of Sacubitril and Valsartan alone are not associated with LVEMR, and it is only their combination that activates these molecular processes.
https://www.nature.com/articles/s41540-017-0013-4

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Dave Belyea  Follow




To confirm cardioprotective property usually use two methods: 
1. Measurement of Troponin T and I 
2. Assessment of size and extent of scar or fibrosis by Late Gadolinium Enhancement by CMR
In recent article by M. Packer et all. confirmed differences in Troponin levels between sacubitril/valsartan and enalapril groups within 4 weeks and were sustained at 8 months, P<0.0001 for the difference between groups at both time points.
From article: "Furthermore, although differences in the levels of troponin between the 2 treatment groups were small, even very low levels of troponin release are believed to reflect ongoing myo- cardial injury (possibly related to increased wall stress),40 and even small increases in the levels of troponin reflect a higher risk of disease progression in heart failure".
http://circ.ahajournals.org/content/early/2014/11/17/CIRCULATIONAHA.114.013748

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Brian Dean  Follow

I ask about protective property of SAC/VAL on I/R damage. This work give us answer...
Conclusion: Reperfusion therapy with SAC/VAL offers acute infarct-sparing benefits similar to VAL, however, LV function at 72h post MI is significantly preserved with SAC/VAL compared to VAL, which may indicate superior long-term benefits of SAC/VAL in prevention of MI-induced heart failure.
Please see:
Conference Paper Reperfusion Therapy With Sacubitril/Valsartan Attenuates Inf...


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David Mott  Follow




Francisco, good results, my congratulations!

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Angela Aldas  Follow

Thanks Sergey! We will soon submit these results as a full text to a peer reviewed journal. I hope the Paradise-AMI clinical trial ongoing brings us new data regarding SAC-VAL cardioprotection in humans during acute STEMI phase

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Life is Beautiful  Follow

Mechanisms of action of novel therapeutics for heart failure.
The ARNi LCZ696 is split into the ARB valsartan and the neprilysin-inhibitor sacubitril. Valsartan abrogates signalling via the AT1 receptor, inhibiting deleterious effects mediated by Ang-II such as vasoconstriction, hypertrophy, and fibrosis in major cardiovascular organs. Sacubitril prevents breakdown of endogenous natriuretic peptides (ANP, BNP, and CNP), thereby augmenting their beneficial actions in cardiovascular disease. The overall effects of ARNi are vasodilatation, natriuresis, and diuresis, as well as inhibition of fibrosis and hypertrophy. Ularitide selectively targets NPR-A, whereas cenderitide activates both NPR-A and NPR-B. Both peptides increase intracellular cGMP, which in turn leads to inhibition of the renin–angiotensin–aldosterone system and attenuation of fibrosis, hypertrophy, and vasoconstriction. sGC activators such as cinaciguat, riociguat, and vericiguat augment the enzymatic activity of sGC (as do serelaxin and NRG-1, via NO), resulting in increased generation of cGMP, and beneficial cardiovascular effects through PKG activity. Upstream of Ang-II, aliskiren directly inhibits renin. Inotroptes include adrenoceptor agonists (dobutamine), PDE3 antagonists (enoximone, milrinone), calcium sensitizers (levosimendan), and a direct activator of cardiac myosin (omecamtiv mecarbil). Abbreviations: ACE, angiotensin-converting enzyme; ADRB1, β1-adrenergic receptor; Ang-I/II, angiotensin I/II; ANP, A-type natriuretic peptide; ARB, angiotensin-receptor blocker; ARNi, angiotensin receptor–neprilysin inhibitor; AT1, type-1 angiotensin II receptor; BNP, B-type natriuretic peptide; CNP, C-type natriuretic peptide; ErbB2/4, receptor tyrosine-protein kinase erbB2/4; NO, nitric oxide; NOS, NO synthase; NPR-A/B, atrial natriuretic peptide receptor 1/2; NRG-1, neuregulin-1; PDE3, phosphodiesterase-3; pGC, plasma-membrane-bound guanylate cyclase; PKA, protein kinase A; PKC, protein kinase C; PKG, protein kinase G; RXFP1, relaxin receptor 1; sGC, soluble guanylate cyclase.
Article New medical therapies for heart failure


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Bobby Tatro  Follow

Medscape: Can't make it to Paris? Visit the virtual ENTRESTO® (sacubitril/valsartan) booth from the ESC-Heart Failure 2017 Congress
Frequently asked questions from health care professionals about ENTRESTO
Sacubitril blocks the breakdown of natriuretic peptides produced in the body. Natriuretic peptides help reduce both strain on the heart and blood pressure. They also protect the heart from developing fibrosis, or scar tissue, that occurs in heart failure.
My notes: 1) ...protect the heart from developing fibrosis - it is long time process, I thinks 6 and more month. 2) ...or scar tissue - maybe this medications influence on cardiomyocyte death or apoptosis...?!

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Daniel TerBush  Follow




From article The Mechanism Of Action Of LCZ696:
Nevertheless, the precise mechanism by which LCZ696 reduces cardiovascular mortality in HF patients is uncertain.
https://www.cfrjournal.com/articles/mechanism-action-lcz696

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Christian Altorfer  Follow

New information:
Sacubitril/Valsartan Attenuates Fibrosis and Improves Left Ventricular Function in a Rabbit Model of HFrEF. Circulation. 2017;136:A24021
Conference Paper Abstract 24021: Sacubitril/Valsartan Attenuates Fibrosis and...


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