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	Changes of membrane-bound and soluble proteins of frontal rat brain cortex induced by morphine Ujčíková, Hana The aim of this Ph.D. thesis was to analyze the morphine-induced changes of frontal brain cortex protein composition in rats exposed to increasing doses of morphine (10-50 mg/kg) for prolonged period of time (10 days). The first part of this work was oriented to the analysis of the phenomenon of hypersensitization/superactivation of adenylyl cyclase (AC), which is regarded as one of the crucial molecular mechanisms causing drastic pathological consequences of drug addiction. The increase of AC activity represents a "compensatory" response and is functionally related to the desensitization of G protein response to prolonged morphine exposure of target cells. The clear desensitization of µ-OR- and δ-OR-stimulated G protein response by morphine was demonstrated in our laboratory by analysis of the dose-response curves of DAMGO and DADLE-stimulated, high-affinity [35 S] GTPγS binding in plasma membranes isolated from frontal brain cortex of rats exposed to morphine according to the same protocol as that used in my Ph.D. thesis (10-50 mg/kg, 10 days). The κ-OR-stimulated [35 S] GTPγS binding was unchanged. It has been determined the amount of all AC isoforms (AC I-IX) in plasma membranes (PM) isolated from control and morphine-treated rats which were sacrificed 24 hours since the last dose of morphine.... Detailed record
	Changes of membrane-bound and soluble proteins of frontal rat brain cortex induced by morphine Ujčíková, Hana ; Svoboda, Petr (advisor) ; Mikšík, Ivan (referee) ; Farghali, Hassan (referee) The aim of this Ph.D. thesis was to analyze the morphine-induced changes of frontal brain cortex protein composition in rats exposed to increasing doses of morphine (10-50 mg/kg) for prolonged period of time (10 days). The first part of this work was oriented to the analysis of the phenomenon of hypersensitization/superactivation of adenylyl cyclase (AC), which is regarded as one of the crucial molecular mechanisms causing drastic pathological consequences of drug addiction. The increase of AC activity represents a "compensatory" response and is functionally related to the desensitization of G protein response to prolonged morphine exposure of target cells. The clear desensitization of µ-OR- and δ-OR-stimulated G protein response by morphine was demonstrated in our laboratory by analysis of the dose-response curves of DAMGO and DADLE-stimulated, high-affinity [35 S] GTPγS binding in plasma membranes isolated from frontal brain cortex of rats exposed to morphine according to the same protocol as that used in my Ph.D. thesis (10-50 mg/kg, 10 days). The κ-OR-stimulated [35 S] GTPγS binding was unchanged. It has been determined the amount of all AC isoforms (AC I-IX) in plasma membranes (PM) isolated from control and morphine-treated rats which were sacrificed 24 hours since the last dose of morphine.... Detailed record
	Changes of membrane-bound and soluble proteins of frontal rat brain cortex induced by morphine Ujčíková, Hana The aim of this Ph.D. thesis was to analyze the morphine-induced changes of frontal brain cortex protein composition in rats exposed to increasing doses of morphine (10-50 mg/kg) for prolonged period of time (10 days). The first part of this work was oriented to the analysis of the phenomenon of hypersensitization/superactivation of adenylyl cyclase (AC), which is regarded as one of the crucial molecular mechanisms causing drastic pathological consequences of drug addiction. The increase of AC activity represents a "compensatory" response and is functionally related to the desensitization of G protein response to prolonged morphine exposure of target cells. The clear desensitization of µ-OR- and δ-OR-stimulated G protein response by morphine was demonstrated in our laboratory by analysis of the dose-response curves of DAMGO and DADLE-stimulated, high-affinity [35 S] GTPγS binding in plasma membranes isolated from frontal brain cortex of rats exposed to morphine according to the same protocol as that used in my Ph.D. thesis (10-50 mg/kg, 10 days). The κ-OR-stimulated [35 S] GTPγS binding was unchanged. It has been determined the amount of all AC isoforms (AC I-IX) in plasma membranes (PM) isolated from control and morphine-treated rats which were sacrificed 24 hours since the last dose of morphine.... Detailed record

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