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Comparative biochemical characteristics of the cat and rabbit urinary bladder
Author(s) -
Levin Robert M.,
Haugaard Niels,
Eika Berit,
Packard David,
McGuire Edward J.,
Elbadawi Ahmad,
Wein Alan J.
Publication year - 1994
Publication title -
neurourology and urodynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.918
H-Index - 90
eISSN - 1520-6777
pISSN - 0733-2467
DOI - 10.1002/1520-6777(1994)13:3<307::aid-nau1930130312>3.0.co;2-k
Subject(s) - medicine , rabbit (cipher) , urology , animal study , urinary bladder , urinary system , surgery , statistics , mathematics
The cat and the rabbit are two of the most popular models for the study of lower urinary bladder function. The cat has been used extensively for in vivo studies of spinal and supra‐spinal micturition reflexes. In contrast, the rabbit has been used extensively for the in vitro study of bladder function. Although the cat and rabbit bladders are approximately the same mass, the cat bladder can generate approximately 6 times the intravesical pressure than the rabbit bladder at the same volume (in vitro response to field stimulation). In order to determine it the increased pressure generation is related to increased cellular energetics, we compared the intracellular concentrations of ATP and creatine phosphate (CP), and the enzyme activities of three enzymes which have important functions in cellular energetics: creatine kinase, citrate synthase, and malic dehydrogenase between the cat and rabbit urinary bladder. The results can be summarized as follows: (I) The bladder weight of the cat and rabbit are similar. (2) The isolated cat bladder can generate approximately 6 times the intravesical pressure of the isolated rabbit bladder, (3) The ATP and CP concentrations of the rabbit are significantly greater than the concentrations in the cat bladder, (4) The hydroxyproline concentration is significantly greater in the eat than the rabbit, (5) The maximum activities of creatine kinase, citrate synthase, and malic dehydrogenase are significantly lower in the cat than the rabbit. In general, it is clear that the ability of the cat to generate high intravesical pressures is not correlated with increased tissue high energy phosphate concentrations, or high enzymatic activities of three specific cytosolic or mitochondrial enzymes. © 1994 Wiley‐Liss, Inc.