Abstract:
:The mechanism by which animals develop tolerance to the antiepileptic effects of the carbonic anhydrase (CA) inhibitor, acetazolamide, was explored using a quantitative immunocytochemical method. Cerebral cortex sections of DBA/2J mice susceptible to audiogenic seizures and of C57BL/6J nonsusceptible mice were stained with antibody to mouse CA II in controls and following treatment with acetazolamide (40 and 200 mg/kg) for 1, 3, and 5 days. The percentage increases in CA II fluorescent intensity of cells from C57 mice treated with 40 and 200 mg/kg acetazolamide over those of untreated mice were 22 and 36%, respectively, after 1 day, 32 and 40%, respectively, after 3 days, and 17 and 40%, respectively, after 5 days of treatment. The corresponding percentage increases in fluorescent intensity of cells from DBA mice over controls were 13 and 32%, respectively, after 1 day, 17 and 41%, respectively, after 3 days, and 26 and 58%, respectively, after 5 days of treatment. The fluorescent intensity of cells from untreated DBA mice was 35% greater than those of untreated C57 mice. In C57 mice the maximum amount of CA II per cell at each dose occurred 24 h after acetazolamide treatment, whereas the amount in DBA mice continued to increase with time and dose up to 5 days. The differences between the two strains can be explained by changes in distribution of CA II to subcellular locations or by defects in phosphorylation of the molecule.
journal_name
Epilepsiajournal_title
Epilepsiaauthors
Banks DA,Anderson RE,Woodbury DMdoi
10.1111/j.1528-1157.1986.tb03576.xsubject
Has Abstractpub_date
1986-09-01 00:00:00pages
510-5issue
5eissn
0013-9580issn
1528-1167journal_volume
27pub_type
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