Summary
Fluorescence histochemistry has been used to study the effects of 6-hydroxydopamine (6-OHDA) (100 mg/kg injected into the dorsal lymph sac) on adrenaline-containing nerves in the large intestine, mesentery, lung, bladder and heart atria of the toad Bufo marinus. A gradual decrease both in fluorescence intensity and in number of detectable fibres during the first 4 hours after 6-OHDA was accompanied by a build-up of fluorescence in the nonterminal regions. These phenomena have been discussed in relation to the time course of the degeneration produced by 6-OHDA in noradrenergic nerves of higher vertebrates. Almost complete “chemical sympathectomy” was seen after one day, and it was not till 13 days that regenerating nerve fibres were seen in any organ. In the large intestine, however, re-innervation was slower, being first noted after 39 days. The time course of regeneration has been compared with that following sympathectomy in various mammalian organs.
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Gillard, S.M., Read, J.B. Fluorescent histochemical studies on the effects of 6-hydroxydopamine on adrenaline-containing nerves in the toad. Z. Zellforsch. 118, 493–511 (1971). https://doi.org/10.1007/BF00324616
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DOI: https://doi.org/10.1007/BF00324616