Species differences in presynaptic serotonin autoreceptors: mainly 5-HT1B but possibly in addition 5-HT1D in the rat, 5-HT1D in the rabbit and guinea-pig brain cortex

1991 ◽  
Vol 343 (4) ◽  
pp. 353-364 ◽  
Author(s):  
N. Limberger ◽  
R. Deicher ◽  
K. Starke



1957 ◽  
Vol 190 (1) ◽  
pp. 157-162 ◽  
Author(s):  
S. A. Kaplan ◽  
S. N. Stein

Slices of guinea pig brain cortex were suspended in a medium containing inorganic ions (in concentrations similar to those present in plasma), glucose and glutamate. They were shaken for 90 minutes at 37°C in oxygen, the partial pressure of which was varied from 1 to 11 atm. absolute. Raising the pressure above 4 atm. absolute resulted in the slices losing considerable quantities of potassium. At 6 atm. absolute the slices accumulated considerably less glutamic acid than they did at 1 atm. These findings suggest that brain cells are unable to maintain their normal concentrations of these two substances when exposed to oxygen at high pressure and suggest a possible mechanism for the origin of the disturbances of function in the central nervous system of animals exposed to high pressures of oxygen.





1962 ◽  
Vol 9 (3) ◽  
pp. 281-288 ◽  
Author(s):  
K. Mase ◽  
Y. Takahashi ◽  
K. Ogata




1996 ◽  
Vol 353 (3) ◽  
pp. 281-289 ◽  
Author(s):  
M. B�hlen ◽  
K. Fink ◽  
C. B�ing ◽  
M. G�thert


1992 ◽  
Vol 282 (2) ◽  
pp. 377-385 ◽  
Author(s):  
C H Lee ◽  
J F Dixon ◽  
M Reichman ◽  
C Moummi ◽  
G Los ◽  
...  

Li+, beginning at a concentration as low as 1 mM, produced a time- and dose-dependent increase in accumulation of [3H]Ins(1,4,5)P3 and [3H]Ins(1,3,4,5)P4 in acetylcholine (ACh)-stimulated guinea-pig brain cortex slices prelabelled with [3H]inositol and containing 1 mM-inositol in the final incubation period. Similar results were obtained by mass measurement of samples incubated with 10 mM-Li+ by using a receptor-binding assay, although the percentage stimulation of Ins(1,4,5)P3 accumulation by Li+ was somewhat less by this assay. The increase in accumulation of Ins(1,4,5)P3 and Ins(1,3,4,5)P4 by Li+ was absolutely dependent on the presence of ACh. In the absence of added inositol, 1-5 mM-Li+ produced smaller increases in Ins(1,4,5)P3, but the Li(+)-dependent increase in Ins(1,3,4,5)P4 was not as affected by inositol omission. In previous studies with cholinergically stimulated rat and mouse brain cortex slices, Li+ inhibited accumulation of Ins(1,4,5)P3 in rat and inhibited Ins(1,3,4,5)P4 accumulation in rat and mouse [Batty & Nahorski (1987) Biochem. J. 247, 797-800; Whitworth & Kendall (1988) J. Neurochem. 51, 258-265]. We found that Li+ inhibited both Ins(1,4,5)P3 and Ins(1,3,4,5)P4 accumulation in these species, but we could reverse this inhibition by adding 10-30 mM-inositol; we then observed a Li(+)-induced increase in Ins(1,4,5)P3 and Ins(1,3,4,5)P4. The species differences observed in the absence of supplemented inositol were explained by the fact that a much higher concentration of inositol was required to bring the Li(+)-elevated levels of CDP-diacylglycerol (CDPDG) down to baseline in the rat and mouse. These data suggest that inositol is more rate-limiting for phosphatidylinositol synthesis in the presence of Li+ in rat and mouse, which can account for the previous reports of inhibition of Ins(1,4,5)P3 and Ins(1,3,4,5)P4 accumulation by this ion in these species. Thus, in all species examined. Li+ could be shown to increase accumulation of Ins(1,4,5)P3 and Ins(1,3,4,5)P4 in cholinergically stimulated brain cortex slices if the slices were supplemented with sufficient inositol to bring the Li(+)-elevated level of CDPDG down to near baseline, as seen in the absence of Li+. In guinea-pig brain cortex slices, increases in Ins(1,4,5)P3 and Ins(1,3,4,5)P4 accumulation could then be seen at Li+ concentrations as low as 1 mM, which falls within the therapeutic range of plasma concentrations in the treatment of manic-depressive disorders. These observations may have therapeutic implications.



1996 ◽  
Vol 117 (2) ◽  
pp. 384-388 ◽  
Author(s):  
Claire Roberts ◽  
Jeannette Watson ◽  
Melanie Burton ◽  
Gary W. Price ◽  
Brian J. Jones


1996 ◽  
Vol 300 (1-2) ◽  
pp. 79-82 ◽  
Author(s):  
Klaus Fink ◽  
Carsten Böing ◽  
Manfred Göthert


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