Cas：199433-58-4 (free base)
Y-39983 (free base), also known as Y-33075, is a potent and selective inhibitor of ROCK family with IC50 value of 3.6nM for ROCK. Y-39983 attenuates experimental autoimmune encephalomyelitis via inhibition of demyelination. Y-39983 downregulates RhoA/Rho-associated kinase expression during its promotion of axonal regeneration. Y-39983, promotes regeneration of crushed axons of retinal ganglion cells into the optic nerve of adult cats.
Chemical Formula: C16H16N4O
Exact Mass: 280.1324
Molecular Weight: 280.331
Elemental Analysis: C, 68.55; H, 5.75; N, 19.99; O, 5.71
Related CAS #: 173897-44-4 (2HCl) 199433-58-4 (free base)
InChi Code: InChI=1S/C16H16N4O/c1-10(17)11-2-4-12(5-3-11)16(21)20-14-7-9-19-15-13(14)6-8-18-15/h2-10H,17H2,1H3,(H2,18,19,20,21)/t10-/m1/s1
Appearance: Solid powder
Purity: >98% (or refer to the Certificate of Analysis)
Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.
Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).
Solubility: Soluble in DMSO
Shelf Life: >2 years if stored properly
Drug Formulation: This drug may be formulated in DMSO
Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).
HS Tariff Code: 2934.99.9001
Y-33075 (Y-39983) is a potent ROCK inhibitor, with an IC50 of 3.6 nM. Y-33075 also inhibits PKC and CaMKII more potently than Y-27632, and the IC50s of Y-27632 and Y-33075 for PKC are 9.0 μM and 0.42 μM, respectively, whereas the IC50s of Y-27632 and Y-33075 for CaMKII are 26 μM and 0.81 μM, respectively. The IC50s of Y-27632 and Y-33075 for PKC is 82 and 117 times those for ROCK, respectively, whereas the IC50s of Y-27632 and Y-33075 for CaMKII is 236 and 225 times those for ROCK, respectively. Y-33075 (Y-39983, 10 μM) extends neurites in the retinal ganglion cells (RGCs) compared with those in RGCs treated without Y-39983. Y-33075 (Y-39983, 1 μM) inhibits the contraction of rabbit ciliary artery segments evoked by histamine in Ca2+-free solutions. Y-33075 (10 μM) shows no effect on the [Ca2+]i increase with the high-potassium (high-K) solution.
In rabbits, Y-39983 (≥0.01%) significantly lowers intraocular pressure (IOP) at 2 hours after topical administration. In monkeys, Y-39983 (0.05%)-treated eyes show significant reduction of IOP between 2 and 7 hours after topical administration. Y-39983 (100 μM) increases the regenerating axons of retinal ganglion cells (RGCs) in the eyes of the rats.
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