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EXCHANGE OF TAURINE IN BRAIN SLICES OF ADULT and 7‐DAY‐OLD RATS
Author(s) -
Oja S. S.
Publication year - 1971
Publication title -
journal of neurochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.75
H-Index - 229
eISSN - 1471-4159
pISSN - 0022-3042
DOI - 10.1111/j.1471-4159.1971.tb09590.x
Subject(s) - taurine , efflux , bicarbonate , endocrinology , medicine , incubation , in vivo , chemistry , intracellular , period (music) , biology , biochemistry , amino acid , physics , acoustics , microbiology and biotechnology
— The influx or efflux of taurine in brain slices prepared from adult and 7‐day‐old rats was studied in Krebs‐Ringer bicarbonate‐glucose medium with 0,2 and 10 m m ‐taurine. The exchange of taurine between the slices and the medium was slow, and no steady‐state concentration was reached within the experimental period of 150 min. In both experimental groups there was a net influx of taurine into the slices from 10 m m ‐taurine and a slight net efflux from the slices into 2 m m ‐taurine. The rate of influx from 10 m m ‐taurine was about the same in the two groups after an initial period of faster influx into the slices of adult rats. There was some rapid initial efflux into 0 and 2 m m ‐taurine solutions from the slices from 7‐day‐old rats, but with prolonged incubation these slices were better able to maintain their intracellular taurine than the slices from adult rats. The reasons and significance of the high cerebral concentration of taurine in immature brain in vivo are briefly discussed in the light of the present and earlier studies.