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The effect of various aminoglycoside antibiotics on glycogen phosphorylase activity in liver and kidney medulla of rabbit
Authors:T Lietz  J Bry?a
Institution:Institute of Biochemistry, University of Warsaw, Poland.
Abstract:Glycogen phosphorylase activity in both liver and kidney medulla of rabbit was stimulated in the presence of caffeine by various aminoglycoside antibiotics in the following rank order: gentamicin greater than neomycin greater than amikacin = kanamycin greater than or equal tobramycin, while streptomycin did not affect the enzyme activity. In contrast, in the presence of AMP, the stimulatory action of antibiotics was not observed. Since in the gentamicin-treated rabbits stimulation of glycogen phosphorylase activity by about 30% in both liver and kidney medulla was accompanied by a decrease of liver glycogen content by about 60% it is likely that a decline in liver glycogen level following antibiotic treatment is due to an increased glycogen phosphorylase activity.
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