Immunohistochemical demonstration of peptides, serotonin and dopamine-beta-hydroxylase-like material in the nervous system of the leech Hirudo medicinalis.
Research article published in Histochemistry (1982)
Abstract
The central ganglia of the leech, Hirudo medicinalis, were processed for the immunohistochemical localisation of bombesin-, substance P-, cholecystokinin-, vasoactive intestinal polypeptide-, enkephalin-, serotonin- and dopamine-beta-hydroxylase-related substances. To varying extents all of the substances were localised in neuropile processes, and all, with the exception of substance P, were associated with specific perikarya. The most prominent neuropeptides, in terms of the number of immunoreactive neurones, were cholecystokinin and vasoactive intestinal peptide. The dopamine-beta-hydroxylase positive neurones are thought to be octopaminergic, and the serotonin monoclonal antibody revealed positive staining in the Retzius cells. We were unable to demonstrate the coexistence of pairs of substances in any neurones in the leech ganglia.
Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.
Summary
The central ganglia of the leech, Hirudo medicinalis, were processed for the immunohistochemical localisation of bombesin-, substance P-, cholecystokinin-, vasoactive intestinal polypeptide-, enkephalin-, serotonin- and dopamine-beta-hydroxylase-related substances. To varying extents all of the...
Why This Matters for Hirudotherapy
This immunohistochemical study localized multiple neuropeptides and neurotransmitters—including bombesin, substance P, cholecystokinin, vasoactive intestinal polypeptide, enkephalin, serotonin, and dopamine-beta-hydroxylase—in the central ganglia of Hirudo medicinalis, identifying CCK and VIP as most prominent by neuron count, serotonin in the characteristic Retzius cells, and putative octopaminergic neurons. This work is directly relevant to ASH's domain as it characterizes the neurochemical anatomy of the medicinal leech species central to hirudotherapy. The study contributes foundational neurobiology of H. medicinalis, though it does not address secretome composition, therapeutic applications, or clinical hirudotherapy outcomes.
Citation
Immunohistochemical demonstration of peptides, serotonin and dopamine-beta-hydroxylase-like material in the nervous system of the leech Hirudo medicinalis.
Osborne et al. · Histochemistry, 1982
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