Entry
Name
Morphine addiction - Homo sapiens (human)
Description
Morphine is an alkaloid from the plant extracts of opium poppy. Although morphine is highly effective for the treatment of pain, it is also known to be intensely addictive. We now know that the most important brain-reward circuit involves dopamine (DA) -containing neurons in the ventral tegmental area (VTA) of the midbrain and their target areas in the limbic forebrain, in particular, the nucleus accumbens (NAc) and frontal regions of cerebral cortex. Morphine can cause indirect excitation of VTA dopamine neurons by reducing inhibitory synaptic transmission mediated by GABAergic neurons. The chronic use of morphine is characterized by adaptive changes in neurons and neuronal communication; such adaptations (e.g., 'superactivation' of adenylyl cyclase) must underlie altered behaviour associated with morphine dependence and withdrawal syndrome, as well as drug-induced craving and relapse to drug use.
Class
Human Diseases; Substance dependence
BRITE hierarchy
Pathway map
Drug
D01340 Naloxone hydrochloride (JP18/USP)
D01383 Meperidine hydrochloride (USP)
D02095 Naltrexone hydrochloride (USP)
D04716 Levomethadyl acetate (USAN)
D04973 Methadyl acetate (USAN)
D10478 Naldemedine tosylate (JAN/USAN)
D10612 Benzhydrocodone (USAN/INN)
D10692 Benzhydrocodone hydrochloride (USAN)
D10812 Nalmefene hydrochloride hydrate (JAN)
D11620 Naloxone hydrochloride dihydrate
D12660 Alphacetylmethadol (INN)
D12661 Betacetylmethadol (INN)
Other DBs
Organism
Homo sapiens (human) [GN:
hsa ]
Gene
134 ADORA1; adenosine A1 receptor [KO:K04265 ]
140679 SLC32A1; solute carrier family 32 member 1 [KO:K15015 ]
200959 GABRR3; gamma-aminobutyric acid type A receptor subunit rho3 [KO:K05190 ]
2550 GABBR1; gamma-aminobutyric acid type B receptor subunit 1 [KO:K04615 ]
2554 GABRA1; gamma-aminobutyric acid type A receptor subunit alpha1 [KO:K05175 ]
2555 GABRA2; gamma-aminobutyric acid type A receptor subunit alpha2 [KO:K05175 ]
2556 GABRA3; gamma-aminobutyric acid type A receptor subunit alpha3 [KO:K05175 ]
2557 GABRA4; gamma-aminobutyric acid type A receptor subunit alpha4 [KO:K05175 ]
2558 GABRA5; gamma-aminobutyric acid type A receptor subunit alpha5 [KO:K05175 ]
2559 GABRA6; gamma-aminobutyric acid type A receptor subunit alpha6 [KO:K05175 ]
2560 GABRB1; gamma-aminobutyric acid type A receptor subunit beta1 [KO:K05181 ]
2561 GABRB2; gamma-aminobutyric acid type A receptor subunit beta2 [KO:K05181 ]
2562 GABRB3; gamma-aminobutyric acid type A receptor subunit beta3 [KO:K05181 ]
2563 GABRD; gamma-aminobutyric acid type A receptor subunit delta [KO:K05184 ]
2564 GABRE; gamma-aminobutyric acid type A receptor subunit epsilon [KO:K05185 ]
2565 GABRG1; gamma-aminobutyric acid type A receptor subunit gamma1 [KO:K05186 ]
2566 GABRG2; gamma-aminobutyric acid type A receptor subunit gamma2 [KO:K05186 ]
2567 GABRG3; gamma-aminobutyric acid type A receptor subunit gamma3 [KO:K05186 ]
2568 GABRP; gamma-aminobutyric acid type A receptor subunit pi [KO:K05189 ]
2569 GABRR1; gamma-aminobutyric acid type A receptor subunit rho1 [KO:K05190 ]
2570 GABRR2; gamma-aminobutyric acid type A receptor subunit rho2 [KO:K05190 ]
2770 GNAI1; G protein subunit alpha i1 [KO:K04630 ]
2771 GNAI2; G protein subunit alpha i2 [KO:K04630 ]
2773 GNAI3; G protein subunit alpha i3 [KO:K04630 ]
2775 GNAO1; G protein subunit alpha o1 [KO:K04534 ]
2790 GNG10; G protein subunit gamma 10 [KO:K04545 ]
2791 GNG11; G protein subunit gamma 11 [KO:K04546 ]
2792 GNGT1; G protein subunit gamma transducin 1 [KO:K04548 ]
2793 GNGT2; G protein subunit gamma transducin 2 [KO:K04549 ]
3760 KCNJ3; potassium inwardly rectifying channel subfamily J member 3 [KO:K04997 ]
3762 KCNJ5; potassium inwardly rectifying channel subfamily J member 5 [KO:K04999 ]
3763 KCNJ6; potassium inwardly rectifying channel subfamily J member 6 [KO:K05000 ]
3765 KCNJ9; potassium inwardly rectifying channel subfamily J member 9 [KO:K05002 ]
55879 GABRQ; gamma-aminobutyric acid type A receptor subunit theta [KO:K05192 ]
773 CACNA1A; calcium voltage-gated channel subunit alpha1 A [KO:K04344 ]
774 CACNA1B; calcium voltage-gated channel subunit alpha1 B [KO:K04849 ]
9568 GABBR2; gamma-aminobutyric acid type B receptor subunit 2 [KO:K04615 ]
Compound
D02271 Morphine hydrochloride hydrate (JP18)
Reference
Authors
Bailey CP, Connor M
Title
Opioids: cellular mechanisms of tolerance and physical dependence.
Journal
Reference
Authors
Williams JT, Christie MJ, Manzoni O
Title
Cellular and synaptic adaptations mediating opioid dependence.
Journal
Reference
Authors
Gintzler AR, Chakrabarti S
Title
Post-opioid receptor adaptations to chronic morphine; altered functionality and associations of signaling molecules.
Journal
Reference
Authors
Bonci A, Williams JT
Title
A common mechanism mediates long-term changes in synaptic transmission after chronic cocaine and morphine.
Journal
Reference
Authors
Liu JG, Anand KJ
Title
Protein kinases modulate the cellular adaptations associated with opioid tolerance and dependence.
Journal
Reference
Authors
Shoji Y, Delfs J, Williams JT
Title
Presynaptic inhibition of GABA(B)-mediated synaptic potentials in the ventral tegmental area during morphine withdrawal.
Journal
Reference
Authors
Zhang Y, Chen Q, Yu LC
Title
Morphine: a protective or destructive role in neurons?
Journal
Reference
Authors
Tso PH, Wong YH
Title
Molecular basis of opioid dependence: role of signal regulation by G-proteins.
Journal
Reference
Authors
Johnson SW, North RA
Title
Opioids excite dopamine neurons by hyperpolarization of local interneurons.
Journal
Reference
Authors
Madhavan A, Bonci A, Whistler JL
Title
Opioid-Induced GABA potentiation after chronic morphine attenuates the rewarding effects of opioids in the ventral tegmental area.
Journal
Reference
Authors
Bonci A, Williams JT
Title
Increased probability of GABA release during withdrawal from morphine.
Journal
Reference
Authors
Morikawa H, Paladini CA
Title
Dynamic regulation of midbrain dopamine neuron activity: intrinsic, synaptic, and plasticity mechanisms.
Journal
Reference
Authors
Xi ZX, Stein EA
Title
GABAergic mechanisms of opiate reinforcement .
Journal
Reference
Authors
Kalivas PW
Title
Neurotransmitter regulation of dopamine neurons in the ventral tegmental area.
Journal
Reference
Authors
Jalabert M, Bourdy R, Courtin J, Veinante P, Manzoni OJ, Barrot M, Georges F
Title
Neuronal circuits underlying acute morphine action on dopamine neurons.
Journal
Reference
Authors
Chakrabarti S, Gintzler AR
Title
Phosphorylation of Gbeta is augmented by chronic morphine and enhances Gbetagamma stimulation of adenylyl cyclase activity.
Journal
Reference
Authors
Ferrer-Alcon M, La Harpe R, Garcia-Sevilla JA
Title
Decreased immunodensities of micro-opioid receptors, receptor kinases GRK 2/6 and beta-arrestin-2 in postmortem brains of opiate addicts.
Journal
Related pathway
KO pathway