Title : Mechanism of depletion of O6-methylguanine-DNA methyltransferase activity in rat tissues by O6-Benzyl-2'-deoxyguanosine. Role of metabolism.

Pub. Date : 1996 May-Jun

PMID : 8797031






15 Functional Relationships(s)
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1 Mechanism of depletion of O6-methylguanine-DNA methyltransferase activity in rat tissues by O6-Benzyl-2"-deoxyguanosine. O(6)-benzyl-2'-deoxyguanosine O-6-methylguanine-DNA methyltransferase Rattus norvegicus
2 O6-Benzyl-2"-deoxyguanosine (O6-BzldGuo) was found to be a potent inhibitor of O6-methylguanine-DNA methyltransferase (MGMT) activity in vivo, despite its demonstrated lower activity compared to O6-benzylguanine (O6-BzlGua) for inactivation of MGMT in cell cultures or cell free extracts. O(6)-benzyl-2'-deoxyguanosine O-6-methylguanine-DNA methyltransferase Rattus norvegicus
3 O6-Benzyl-2"-deoxyguanosine (O6-BzldGuo) was found to be a potent inhibitor of O6-methylguanine-DNA methyltransferase (MGMT) activity in vivo, despite its demonstrated lower activity compared to O6-benzylguanine (O6-BzlGua) for inactivation of MGMT in cell cultures or cell free extracts. O(6)-benzyl-2'-deoxyguanosine O-6-methylguanine-DNA methyltransferase Rattus norvegicus
4 O6-Benzyl-2"-deoxyguanosine (O6-BzldGuo) was found to be a potent inhibitor of O6-methylguanine-DNA methyltransferase (MGMT) activity in vivo, despite its demonstrated lower activity compared to O6-benzylguanine (O6-BzlGua) for inactivation of MGMT in cell cultures or cell free extracts. O(6)-benzyl-2'-deoxyguanosine O-6-methylguanine-DNA methyltransferase Rattus norvegicus
5 O6-Benzyl-2"-deoxyguanosine (O6-BzldGuo) was found to be a potent inhibitor of O6-methylguanine-DNA methyltransferase (MGMT) activity in vivo, despite its demonstrated lower activity compared to O6-benzylguanine (O6-BzlGua) for inactivation of MGMT in cell cultures or cell free extracts. O(6)-benzyl-2'-deoxyguanosine O-6-methylguanine-DNA methyltransferase Rattus norvegicus
6 O6-Benzyl-2"-deoxyguanosine (O6-BzldGuo) was found to be a potent inhibitor of O6-methylguanine-DNA methyltransferase (MGMT) activity in vivo, despite its demonstrated lower activity compared to O6-benzylguanine (O6-BzlGua) for inactivation of MGMT in cell cultures or cell free extracts. O(6)-benzyl-2'-deoxyguanosine O-6-methylguanine-DNA methyltransferase Rattus norvegicus
7 O6-Benzyl-2"-deoxyguanosine (O6-BzldGuo) was found to be a potent inhibitor of O6-methylguanine-DNA methyltransferase (MGMT) activity in vivo, despite its demonstrated lower activity compared to O6-benzylguanine (O6-BzlGua) for inactivation of MGMT in cell cultures or cell free extracts. O(6)-benzyl-2'-deoxyguanosine O-6-methylguanine-DNA methyltransferase Rattus norvegicus
8 O6-Benzyl-2"-deoxyguanosine (O6-BzldGuo) was found to be a potent inhibitor of O6-methylguanine-DNA methyltransferase (MGMT) activity in vivo, despite its demonstrated lower activity compared to O6-benzylguanine (O6-BzlGua) for inactivation of MGMT in cell cultures or cell free extracts. O(6)-benzylguanine O-6-methylguanine-DNA methyltransferase Rattus norvegicus
9 At doses above 50 mg/kg, O6-BzldGuo completely suppresses the MGMT activity in liver, lung and brain for 12 to 18 hrs following treatment. O(6)-benzyl-2'-deoxyguanosine O-6-methylguanine-DNA methyltransferase Rattus norvegicus
10 O6-BzldGuo is metabolized mainly in the liver, and possibly in kidney and lung, to yield the more potent MGMT inhibitors O6-BzlGua and O6-Benzyl-7,8-dihydro-8-oxoguanine (O6-Bzl(8-OX)Gua), that reach maximum levels following the decline of the parent compound both in tissues and the circulation. O(6)-benzyl-2'-deoxyguanosine O-6-methylguanine-DNA methyltransferase Rattus norvegicus
11 O6-BzldGuo is metabolized mainly in the liver, and possibly in kidney and lung, to yield the more potent MGMT inhibitors O6-BzlGua and O6-Benzyl-7,8-dihydro-8-oxoguanine (O6-Bzl(8-OX)Gua), that reach maximum levels following the decline of the parent compound both in tissues and the circulation. O(6)-benzylguanine O-6-methylguanine-DNA methyltransferase Rattus norvegicus
12 O6-BzldGuo is metabolized mainly in the liver, and possibly in kidney and lung, to yield the more potent MGMT inhibitors O6-BzlGua and O6-Benzyl-7,8-dihydro-8-oxoguanine (O6-Bzl(8-OX)Gua), that reach maximum levels following the decline of the parent compound both in tissues and the circulation. O(6)-benzyl-8-oxoguanine O-6-methylguanine-DNA methyltransferase Rattus norvegicus
13 O6-BzldGuo is metabolized mainly in the liver, and possibly in kidney and lung, to yield the more potent MGMT inhibitors O6-BzlGua and O6-Benzyl-7,8-dihydro-8-oxoguanine (O6-Bzl(8-OX)Gua), that reach maximum levels following the decline of the parent compound both in tissues and the circulation. o6-bzl O-6-methylguanine-DNA methyltransferase Rattus norvegicus
14 O6-BzldGuo is metabolized mainly in the liver, and possibly in kidney and lung, to yield the more potent MGMT inhibitors O6-BzlGua and O6-Benzyl-7,8-dihydro-8-oxoguanine (O6-Bzl(8-OX)Gua), that reach maximum levels following the decline of the parent compound both in tissues and the circulation. 8-ox O-6-methylguanine-DNA methyltransferase Rattus norvegicus
15 Although O6-BzldGuo may cause the initial drop of MGMT activity, continued prolonged suppression is likely due to the persistence of its MGMT-inhibiting metabolites. O(6)-benzyl-2'-deoxyguanosine O-6-methylguanine-DNA methyltransferase Rattus norvegicus