uterine smooth muscle

Ritodrine hydrochloride (NSC 291565) binds to and activates beta-2 adrenergic receptors of myometrial cells in the uterus, which decreases the intensity and frequency of uterine contractions. Ritodrine hydrochloride (NSC 291565) is a phenethylamine derivative with tocolytic activity. Specifically, Ritodrine hydrochloride (NSC 291565) probably activates adenyl cyclase, thereby increasing production of cyclic adenosine monophosphate (cAMP), which in turn enhances the efflux of calcium from vascular smooth muscle cells. A lack of intracellular calcium prevents uterine myometrial contractions. In addition, this agent may directly inactivate myosin light chain kinase, a critical enzyme necessary for the initiation of muscle contractions.

Isoxsuprine hydrochloride (Isolait) is a beta-adrenergic agonist that causes direct relaxation of uterine and vascular smooth muscle.

14-Deoxyandrographolide is a bioactive compound of Andrographis paniculata with hepatoprotective efficacy. It desensitizes hepatocytes to TNF-α-mediated apoptosis through the release of TNFRSF1A release.

Neuromedin C is a bombesin-like neuropeptide that stimulates uterine smooth muscle contraction and the release of gastrin , somatostatin, and amylase in rats. Neuromedin C is a truncated form of gastrin-releasing peptide corresponding to the GRP amino acids 18-27. It inhibits GRP and bombesin binding to rat pancreatic membranes (IC50s = 0.4 and 2.2 nM, respectively), which can be reduced by sodium chloride and guanylyl imidodiphosphate . Neuromedin C induces scratching and mast cell degranulation in mice when administered intradermally at doses ranging from 1 to 300 nmol/site, which is inhibited by the BB2 bombesin receptor agonist RC-3095 and reduced in mast cell-deficient mice. Neuromedin C (3.2 nmol/kg, i.p.) reduces rat glucose consumption by approximately 50% for up to one hour.

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

PDC31 (THG113.31; ILGHXDYK) is a D-amino acid-based oligopeptide that acts as an allosteric and non-competitive inhibitor of the FP Prostaglandin Receptor, used primarily as a smooth muscle contractile agent. It effectively reduces the strength and duration of uterine contractions in vivo, offering potential for preterm labor and primary dysmenorrhea (PD) research. Additionally, PDC31 enhances the Ca2+-dependent large-conductance K+-channel in human myometrial cells [1] [2].

C16 globotriaosylceramide is an endogenous sphingolipid found in mammalian cell membranes that is synthesized from C16 lactosylceramide . C16 globotriaosylceramide acts as a receptor for Shiga toxin in B cell-derived Raji cells and THP-1 monocytes. It accumulates in endothelial cells, pericytes, vascular smooth muscle cells, renal epithelial cells, dorsal ganglia neuronal cells, and myocardial cells in patients with Fabry disease. C16 globotriaosylceramide is also upregulated in plasma of patients with ovarian carcinoma compared to those with benign ovarian tumors or uterine fibroids.

15(S)-15-methyl PGE2 is a potent, metabolically stable analog of PGE2. It is a potent gastric antisecretory and antiulcer compound. 15(S)-15-methyl PGE2 binds to human myometrium with twice the affinity of PGE2 and is ten times more potent than PGE1 in contracting uterine smooth muscle.

Isoxsuprine Free Base is a beta-adrenergic agonist that causes direct relaxation of uterine and vascular smooth muscle. Its vasodilating actions are greater on the arteries supplying skeletal muscle than on those supplying skin. It is used in the treatment of peripheral vascular disease and in premature labor.

Sigetin affects the transport of calcium and magnesium in uterine smooth muscle and can be used in fetal development.

3-Epioleanolic acid and oleanonic acid possess varying degrees of agonist activity on uterine smooth muscle with minor changes in the molecular structure affecting its intrinsic activity on uterine muscle.