ISSN:
1432-2072
Keywords:
Lithium
;
5-Hydroxytryptamine
;
5-HT1 receptor
;
5-HT2 receptor
;
a 2-Adrenoceptor
;
8-OH-DPAT
;
Clonidine
;
Mouse
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract Lithium administration (LiCl, 10 mmol/kg, SC on day 1, followed by 3 mmol/kg twice daily subsequently) for 14 days to mice produced attenuation of the hypothermic response to injection of 8-hydroxy-2-(di-n-propyla-mino)tetralin (8-OH-DPAT, 0.5 mg/kg SC). Head twitch responses to the 5-HT-receptor agonist 5-methoxy-N,N-dimethyltryptamine (2.5 mg/kg IP) and to precursor loading with carbidopa (25 mg/kg, IP) and 5-hydroxytryptophan (100 mg/kg IP) were similarly attenuated. By contrast with this reduction of 5-hydroxytryptamine (5-HT) function mediated by the 5-HT1A and 5-HT2 receptor sub-types, repeated lithium administration had no effect on the motor response to a putative 5-HT1B receptor agonist 5-methoxy-3(1,2,3,6-tetrahydropyridin-4-yl)1H indole (RU 24969, 3 mg/kg IP). Alpha2 adrenoceptor function, assessed by the sedation response to clonidine (0.25 mg/kg, IP), was also attenuated by repeated lithium administration. It is proposed that these actions may explain the emergence of lithium as an adjunct to the treatment of refractory depressive illness.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00174065
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