background strain #65306; Long-Evans rat #65288; Iar:Long-Evans #65289; Transgene #65306; (1) Parvalbumin (PV) promoter #65306; mouse derived (MGI:97821). PV is calcium-binding protein. (2) tetracycline transactivator (tTA) #65306; Fusion protein of tetracycline repressor (Escherichia coli-derived) and VP16 (Herpes simplex virus-derived). In the absence of Doxycycline (Dox), tTA binds to tetracycline-responsive element (TRE) and expression of TRE-controlled genes can be induced. Vector #65306; pBlueScript (Stratagene), pBACe3.6 (CHORI)
tetracycline transactivator(tTA) is expressed in Parvalbumin-positive cells (neurons). In the absence of Dox, tTA binds to TRE and expression of TRE-controlled genes can be induced only in the Parvalbumin-positive cells. Expression of TRE-controlled genes can be repressed by Dox. (Tet-Off system)