C16 (drug)

C16 (drug)
CAS Number 608512-97-6
PubChem (CID) 6490494
ChemSpider 4990932
ECHA InfoCard 100.211.648
Chemical and physical data
Formula C13H8N4OS
Molar mass 268.293 g/mol
3D model (Jmol) Interactive image

C16 or PKRi is a drug which acts as a selective inhibitor of the enzyme double-stranded RNA-dependent protein kinase (PKR). It has been shown to effectively inhibit PKR function in vivo and has neuroprotective and nootropic effects in animal studies.[1][2][3][4][5][6]

See also


  1. Jammi NV, Whitby LR, Beal PA. Small molecule inhibitors of the RNA-dependent protein kinase. Biochemical and Biophysical Research Communications. 2003 Aug 15;308(1):50-7. PMID 12890478
  2. Shimazawa M, Hara H. Inhibitor of double stranded RNA-dependent protein kinase protects against cell damage induced by ER stress. Neuroscience Letters. 2006 Dec 6;409(3):192-5. PMID 17055645
  3. Ingrand, S.; Barrier, L.; Lafay-Chebassier, C.; Fauconneau, B.; Page, G. N.; Hugon, J. (2007). "The oxindole/imidazole derivative C16 reduces in vivo brain PKR activation". FEBS Letters. 581 (23): 4473–4478. doi:10.1016/j.febslet.2007.08.022. PMID 17761171.
  4. Chen, H. M.; Wang, L.; d'Mello, S. R. (2008). "A chemical compound commonly used to inhibit PKR, {8-(imidazol-4-ylmethylene)-6H-azolidino[5,4-g] benzothiazol-7-one}, protects neurons by inhibiting cyclin-dependent kinase". European Journal of Neuroscience. 28 (10): 2003–2016. doi:10.1111/j.1460-9568.2008.06491.x. PMC 3320856Freely accessible. PMID 19046382.
  5. Couturier J, Morel M, Pontcharraud R, Gontier V, Fauconneau B, Paccalin M, Page G. Interaction of double-stranded RNA-dependent protein kinase (PKR) with the death receptor signaling pathway in amyloid beta (Abeta)-treated cells and in APPSLPS1 knock-in mice. Journal of Biological Chemistry. 2010 Jan 8;285(2):1272-82. PMID 19889624
  6. Zhu PJ, Huang W, Kalikulov D, Yoo JW, Placzek AN, Stoica L, Zhou H, Bell JC, Friedlander MJ, Krnjevic K, Noebels JL, Costa-Mattioli M (2011). "Suppression of PKR Promotes Network Excitability and Enhanced Cognition by Interferon-γ-Mediated Disinhibition". Cell. 147 (6): 1384–1396. doi:10.1016/j.cell.2011.11.029. PMC 3569515Freely accessible. PMID 22153080.

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