In vitro: SR-3677 had an IC50 of ~3 nM in enzyme and cell based assays and had an off-target hit rate of 1.4% against 353 kinases, and inhibited only 3 out of 70 nonkinase enzymes and receptors. Pharmacology studies showed that SR-3677 was efficacious in both, increasing ex vivo aqueous humor outflow in porcine eyes and inhibiting myosin light chain phosphorylation. SR-3677 inhibited only three adrenergic receptors: α1a, α1b, and α2a with 53%, 68%, and 76% inhibition, respectively, at 3 ?M inhibitor concentration, which indicates IC50 values in the 1 ?M range or ~300 times higher than the IC50 against ROCK-II in cell-based assays. In vivo: Continuous exposure of 25 ?M SR-3677 increases the outflow facility by 60% at 1 h perfusion, increasing to 70-80% for the 2-5 h time points (p < 0.01). This 70-80% increase in outflow is the maximal response that can be attained and is achieved at doses 2-4-fold lower than needed for Y-27632, a well studied ROCK inhibitor.TM tissue derived from the eyes perfused with 25 ?M SR-3677 shows a very faint band for p-MLC suggesting greater than 90% inhibition of Rho kinase in the TM tissue at this dose.
| Molecular Weight | 408.45 |
| Formula | C22H24N4O4 |
| CAS Number | 1072959-67-1 |
| Solubility (25°C) | 10mM in DMSO |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
| Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
| Related ROCK Products |
|---|
| Akt/ROCK-IN-1
Akt/ROCK-IN-1 (B12) is a dual inhibitor for Akt and ROCK, with the IC50s of 0.023 nM and 1.47 nM, respectively. |
| Scaff10-8
Scaff10-8, bound to RhoA, inhibits the AKAP-Lbc-mediated RhoA activation. |
| ROCK-IN-6
ROCK-IN-6 is a potent and selectiveROCK2 inhibitor with an IC50 of 2.19 nM. |
| ROCK-IN-4
ROCK-IN-4 is a potent ROCK inhibitor maintaining NO releasing ability. |
| ROCK-IN-32
ROCK-IN-32 is a ROCK inhibitor, with an IC50 value of 11 nM for ROCK2. |
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