contractility

Vesnarinone HCl (OPC-8212 HCl) is an orally active phosphodiesterase 3 (PDE3) inhibitor.Vesnarinone HCl modulates calcium and potassium ions, increasing calcium flux and decreasing potassium flux.Vesnarinone HCl is a new positive inotropic compound that enhances myocardial contractility and can be be used in heart failure studies.

Silperisone HCl (RGH-5002) blocks sodium and calcium channels in cells, decreases excitability and contractility of muscle cells, reduces peripheral tone, and acts as a muscle relaxant and peripheral vasodilator. Silperisone HCl is used to treat recurrent painful myoclonus due to spinal cord injury, abnormal hypertonia due to cerebrovascular disease, dystonia symptoms, cone tension syndrome, multiple sclerosis myospasm and myelitis. silperisone is a sodium channel protein type 2 alpha channel blocker. silperisone is an organosilicon similar to tolperisone, an organosilicon compound with centrally acting muscle relaxant properties.

Nifedipine (Procardia) is a dihydropyridine calcium channel blocking agent. Nifedipine inhibits the transmembrane influx of extracellular calcium ions into myocardial and vascular smooth muscle cells, causing dilatation of the main coronary and systemic arteries and decreasing myocardial contractility. This agent also inhibits the drug efflux pump P-glycoprotein which is overexpressed in some multi-drug resistant tumors and may improve the efficacy of some antineoplastic agents.

Theophylline monohydrate (Quibron) appears to inhibit phosphodiesterase and prostaglandin production, regulate calcium flux and intracellular calcium distribution, and antagonize adenosine. Theophylline monohydrate is a natural alkaloid derivative of xanthine isolated from the plants Camellia sinensis and Coffea arabica. Physiologically, this agent relaxes the bronchial smooth muscle, produces vasodilation (except in cerebral vessels), stimulates the CNS, stimulates the cardiac muscle, induces diuresis, and increases gastric acid secretion; it may also suppress inflammation and improve contractility of the diaphragm.

Tetraethylammonium chloride is a quaternary ammonium compound. It is a non-selective potassium channel blocker. It is a good substrate for organic cation transporter proteins and has antitumor properties.

Levosimendan (OR1259) is a calcium sensitizer used in the management of acutely decompensated congestive heart failure. It increases the sensitivity of the heart to calcium, thus increasing cardiac contractility without a rise in intracellular calcium. Levosimendan exerts its effect by increasing calcium sensitivity of myocytes by binding to cardiac troponin C in a calcium-dependent manner.

APJ receptor agonist 8 is a small molecule agonist of the APJ receptor, enhancing load-independent cardiac contractility in isolated perfused rat hearts. It mimics the action of the endogenous ligand Apelin and has an EC50 of 21.5 µM.

Fropofol (2-fluoro-1,3-diisopropylbenzene) is a non-anesthetic small molecule that specifically reduces myocardial contractility and inhibits myofilament contraction. It can be used in research on hypertrophic cardiomyopathy and cardiovascular diseases.

TRV120027 TFA is a β-arrestin-1-biased agonist of the angiotensin II receptor type 1 (AT1R) and engages ß-arrestins while blocking G-protein signaling.

ORM-3819 is a potent and selective PDE III inhibitor. ORM-3819 promotes cardiac contractility through Ca(2+) sensitization.

Neuropeptide Y (NPY), a neuropeptide, plays roles in regulating appetite, vasoconstriction, cardiac contractility, and intestinal secretion, acting as an agonist for NPY receptors Y1, Y2, and Y5. Expressed ubiquitously, NPY modulates cellular responses by selectively inhibiting forskolin-induced cAMP accumulation in L-M(TK-) cells expressing rat Y1 or Y2 and in HEK293 cells expressing rat Y5, more so than in cells expressing rat Y4 receptors (EC50s = 0.15, 2.7, 0.66, and >1,000 nM, respectively). Additionally, it elevates perfusion pressure in isolated guinea pig hearts (EC30 = 1.3 nM) and, when administered intracerebroventricularly at 300 pmol/animal, it notably increases food intake in rats.

RO 363 is an effective inotropic stimulant and is a cardiovascular modulator that decreases diastolic blood pressure and pronounces increases in myocardial contractility. Ro 363 is an effective and highly selective β1-adrenoceptor agonist.

Pseudoginsenoside RT1, isolated from the fruit of Randia siamensis, exhibits acute ichthyotoxic activity and can cause a decrease in blood pressure, an increase in heart rate, and heightened spontaneous contractility of the uterus.

13-Hydroxylupanine, a characteristic alkaloid of sweet lupins, inhibits ganglionic transmission, reduces cardiac contractility, and induces contraction of uterine smooth muscle [1].

Acotiamide hydrochloride is a selective, orally active, reversible acetylcholine ester (AChE) inhibitor (IC50: 1.79 μM) that increases gastric contractility, accelerates delayed gastric emptying, and can be used to study functional dyspepsia and intestinal inflammation in gastric motility disorders.

Simendan is a compound utilized for treating heart failure. It belongs to the categories of hydrazone derivatives and pyridazine derivatives, and it exhibits properties as a calcium sensitizer and positive inotropic agent, enhancing myocardial contractility.

PD 122860 is a dihydropyridine with calcium channel blocking and sodium channel stimulating properties. In the rat heart, PD 122860 increased left ventricular contractility, decreased coronary resistance and altered the shape of the electrocardiogram T-wa

Pyrromecaine is a local anesthetic used for surface anesthesia. Pyromecaine has a wide spectrum of antiarrhythmic action, exerts a favorable effect on the contractility of the left ventricle, and on the myocardial blood flow following the ligation of the

(Phe2,Orn8)-Oxytocin, a selective V1 vasopressin agonist, exhibits sustained contractility in rabbit epididymis, achieving an EC50 value of 280 nM [1].

(Phe2,Orn8)-Oxytocin acetate, a selective V1 vasopressin agonist, demonstrates pronounced contractility induction in rabbit epididymis, characterized by a sustained response with an EC50 value of 280 nM [1].

Cyclic GMP is an endogenous second messenger that initiates interferon production in response to cytoplasmic DNA. It activates the stimulator of interferon genes (STING), triggering a signaling cascade that results in the production of type I interferons and other immune mediators. The conjugate of cyclic GMP and AMP, known as Cyclic-GMP-AMP, can induce the phosphorylation and nuclear translocation of IRF3, thereby enhancing antiviral immune responses. Additionally, Cyclic GMP may activate PDE to degrade cAMP, inhibit the myocardial calcium current ICa, and regulate cardiac contractility. The derivative 8-Br-cGMP exhibits antiplatelet activity, and Cyclic GMP is used in research related to antiviral immunity and cardiovascular diseases.

Ouabain is a cardiac steroid that binds to and inhibits the activity of Na(+), K(+)-ATPase. This compound enhances myocardial contractility, stabilizes heart rate, and promotes the growth of cardiac, vascular, and neural cells both in vitro and in vivo.

Ro 363 hydrochloride is an effective, highly selective agonist of β 1-adrenoceptor. Ro 363 hydrochloride is an effective inotropic stimulant. Ro 363 hydrochloride is a cardiovascular regulator, which can reduce diastolic blood pressure and significantly increase myocardial contractility.

1,2-Dipentadecanoyl-rac-glycerol (DG(15:0 15:0 0:0)) is a compound referenced in studies examining the effect of insulin on the content of 1,2-diacylglycerol in rat hearts. Insulin is observed to increase the amount of 1,2-diacylglycerol containing specific fatty acid compositions in the heart, which may be linked to cardiac contractility.