SMN2-Stablizer-27 is a stablizer of survival of motor neuron 2 (SMN2), and a post-translationally stablizing SMN protein for the treatment of spinal muscular atrophy (SMA).
The Survival of Motor Neurons (SMN) protein participates in RNA splicing. Decreases in SMN, typically a consequence of defects in the smn1 gene, result in the death of motor neurons and lead to the neurodegenerative disease, spinal muscular atrophy (SMA). Cuspin-1 is a small molecule upregulator of SMN that has been shown in vitro to increase levels of SMN in SMA patient fibroblasts by 50% at 18 μM. Its mechanism of action is thought to involve increased phosphorylation of ERK to initiate Ras-Raf-MEK signaling, which results in an increased rate of SMN translation.
Urocortin II is a neuropeptide hormone and member of the corticotropin-releasing factor (CRF) family which includes mammalian CRF , urocortin , urocortin III , frog sauvagine, and piscine urotensin I.1 Mouse urocortin II shares 34 and 42% sequence homology with rat CRF and urocortin . It is expressed in mouse paraventricular, supraoptic, and arcuate nuclei of the hypothalamus, the locus coeruleus, and in motor nuclei of the brainstem and spinal ventral horn. Urocortin II selectively binds to CRF1 over CRF2 receptors (Kis = 0.66 and >100 nM, respectively) and induces cAMP production in CHO cells expressing CRF2 (EC50 = 0.14 nM). In vivo, urocortin II suppresses nighttime food intake by 35% in rats when administered intracerebroventricularly at a dose of 1 μg. Urocortin II (0.1 and 0.5 μg, i.c.v) stimulates fecal pellet output, increases distal colonic transit, and inhibits gastric emptying in mice.2References1. Reyes, T.M., Lewis, K., Perrin, M.H., et al. Urocortin II: A member of the corticotropin-releasing factor (CRF) neuropeptide family that is selectively bound by type 2 CRF receptors. Proc. Natl. Acad. Sci. U.S.A. 98(5), 2843-2848 (2001).2. Martinez, V., Wang, L., Million, M., et al. Urocortins and the regulation of gastrointestinal motor function and visceral pain. Peptides 25(10), 1733-1744 (2004). Urocortin II is a neuropeptide hormone and member of the corticotropin-releasing factor (CRF) family which includes mammalian CRF , urocortin , urocortin III , frog sauvagine, and piscine urotensin I.1 Mouse urocortin II shares 34 and 42% sequence homology with rat CRF and urocortin . It is expressed in mouse paraventricular, supraoptic, and arcuate nuclei of the hypothalamus, the locus coeruleus, and in motor nuclei of the brainstem and spinal ventral horn. Urocortin II selectively binds to CRF1 over CRF2 receptors (Kis = 0.66 and >100 nM, respectively) and induces cAMP production in CHO cells expressing CRF2 (EC50 = 0.14 nM). In vivo, urocortin II suppresses nighttime food intake by 35% in rats when administered intracerebroventricularly at a dose of 1 μg. Urocortin II (0.1 and 0.5 μg, i.c.v) stimulates fecal pellet output, increases distal colonic transit, and inhibits gastric emptying in mice.2 References1. Reyes, T.M., Lewis, K., Perrin, M.H., et al. Urocortin II: A member of the corticotropin-releasing factor (CRF) neuropeptide family that is selectively bound by type 2 CRF receptors. Proc. Natl. Acad. Sci. U.S.A. 98(5), 2843-2848 (2001).2. Martinez, V., Wang, L., Million, M., et al. Urocortins and the regulation of gastrointestinal motor function and visceral pain. Peptides 25(10), 1733-1744 (2004).
L-AP4 (L-APB) monohydrate is a potent and specific agonist for the group III mGluRs, with EC50s of 0.13, 0.29, 1.0, 249 μM for mGlu4, mGlu8, mGlu6 and mGlu7 receptors, respectively[1][2]. L-AP4 (5-30 μg, intrathecal inhection 4-5 days) significantly increases the paw withdrawal threshold in response to application of von Frey filaments in eight nerve-ligated rats in a dose-dependent manner. Intrathecal administration of different doses of L-AP4 is not associated with any evident motor dysfunction[2].Intrathecal injection of 30 μg of L-AP4 does not significantly alter the paw withdrawal latency in these normal rats[2].Topical application of 5 to 50 μM L-AP4 to the spinal cord significantly inhibited the evoked response of neurons to touch, pressure, pinch, and von Frey filaments in a concentration-dependent fashion[2]. Animal Model: Rats.[2] [1]. Selvam C, et al. Increased Potency and Selectivity for Group III Metabotropic Glutamate Receptor Agonists Binding at Dual sites. J Med Chem. 2018 Mar 8;61(5):1969-1989. [2]. Chen SR, et al. Distinct roles of group III metabotropic glutamate receptors in control of nociception and dorsal horn neurons in normal and nerve-injured Rats. J Pharmacol Exp Ther. 2005 Jan;312(1):120-6.