Abstract:
:The central distal axonopathy induced in dogs by the administration of high doses of clioquinol is contrasted with the central-peripheral distal axonopathy precipitated by intoxication with 2,5-hexanedione. Mature, pure-bred Beagle dogs received a daily oral dose of 400 mg/kg of clioquinol for up to 7 months, or 1 ml per animal (approximately corresponding to 110 mg/kg) of 2,5-hexanedione for up to 5 months. Intoxicated and control animal were killed and perfused at monthly intervals, so that the spatial-temporal development of the lesion could be followed and correlated with clinical symptoms. During the treatment, dogs intoxicated with 2,5-hexanedione developed symptoms of peripheral neuropathy consisting of flaccid weakness, muscle atrophy, hind-limb foot-drop and areflexia. By contrast, the dogs surviving clioquinol intoxication exhibited a stiff-legged gait, hyperreflexia but no muscle atrophy. Light and electron microscope examination of central and peripheral nervous tissue from dogs intoxicated with 2,5-hexanedione revealed giant axonal swelling and distal axonal degeneration. By contrast, dogs receiving clioquinol showed a distal axonal degeneration confined to the optic tract and the long spinal cord tracts, without any visible involvement of peripheral nerves.
journal_name
Acta Neuropatholjournal_title
Acta neuropathologicaauthors
Krinke G,Schaumburg HH,Spencer PS,Thomann P,Hess Rdoi
10.1007/BF00690549subject
Has Abstractpub_date
1979-08-01 00:00:00pages
213-21issue
3eissn
0001-6322issn
1432-0533journal_volume
47pub_type
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