Summary
We report a detailed comparative immunocytochemical mapping of enkephalin, CCK and ACTH/gb-endorphin immunoreactive nerves in the central nervous system of rat and guinea pig. Enkephalin immunoreactivity was detected in many groups of nerve cell bodies, fibers and terminals in the limbic system, basal ganglia, hypothalamus, thalamus, brain stem and spinal cord. β-endorphin and ACTH immunoreactivity was limited to a single group of nerve cell bodies in and around the arcuate nucleus and in fibers and terminals in the midline areas of the hypothalamus, thalamus and mesencephalic periaqueductal gray with lateral extensions to the amygdaloid area. Cholecystokinin immunoreactive nerve fibers and terminals displayed a distribution similar to that of enkephalin in many regions; but striking differences were also found. An immunocytochemical doublestaining technique, which allowed simultaneous detection of two different peptides in the same tissue section, showed that enkephalin-, CCK- and ACTH/β-endorphin-immunoreactive nerves although closely intermingled in many brain areas, occurred separately. The distributions of nerve terminals containing these neuropeptides showed striking overlaps and also paralleled the distribution of opiate receptors. This may suggest that enkephalin, CCK, ACTH and β-endorphin may interact with each other and with opiate receptors.
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Abbreviations
- CA:
-
Commissura anterior
- CAI:
-
Capsula interna
- CO:
-
Chiasma opticum
- CPF:
-
Cortex piriformis
- CSDD:
-
Commissura supraoptica dorsalis, pars dorsalis (Ganser)
- CSDV:
-
Commissura supraoptica dorsalis, pars ventralis (Meynert)
- FMP:
-
Fasciculus medialis prosencephali
- FOR:
-
Formatio reticularis
- GD:
-
Gyrus dentatus
- GP:
-
Glubus pallidus
- H:
-
Habenula
- HI:
-
Hippocampus
- S:
-
Subiculum
- SGCD:
-
Substantia grisea centralis, pars dorsalis
- SGCL:
-
Substantia grisea centralis, pars lateralis
- SGPV:
-
Substantia grisea periventricularis
- SNC:
-
Substantia nigra, zona compacta
- SNL:
-
Substantia nigra, pars lateralis
- ST:
-
Stria terminalis
- STP:
-
Stria terminalis, pars precommissuralis
- TD:
-
Tractus diagonalis (Broca)
- TO:
-
Tractus opticus
- TSHT:
-
Tractus septohypothalamicus
- TUOP:
-
Tuberculum olfactorium, pars corticalis
- SUM:
-
Decussatio supramamillaris
- a:
-
Nucleus accumbens
- ac:
-
Nucleus amygdaloideus centralis
- aco:
-
Nucleus amygdaloideus corticalis
- am:
-
Nucleus amygdaloideus medialis
- ar:
-
Nucleus arcuatus
- cp:
-
Nucleus caudatus putamen
- dcgl:
-
Nucleus dorsalis corporis geniculati lateralis
- em:
-
Eminentia mediana
- fm:
-
Nucleus paraventricularis, pars magnocellularis
- fp:
-
Nucleus paraventricularis, pars parvocellularis
- ha:
-
Nucleus anterior (hypothalami)
- hd:
-
Nucleus dorsomedialis (hypothalami)
- hl:
-
Nucleus lateralis (hypothalami)
- hp:
-
Nucleus posterior (hypothalami)
- hpv:
-
Nucleus periventricularis (hypothalami)
- hv:
-
Nucleus ventromedialis (hypothalami)
- ip:
-
Nucleus interpeduncularis
- mcgm:
-
Nucleus marginalis corporis geniculatic medialis
- mm:
-
Nucleus mammillaris medialis
- ml:
-
Nucleus mammillaris lateralis
- mh:
-
Nucleus medialis habenulae
- p:
-
Nucleus pretectalis
- pf:
-
Nucleus parafascicularis
- pom:
-
Nucleus preopticus medialis
- pop:
-
Nucleus preopticus periventricularis
- posc:
-
Nucleus preopticus, pars suprachiasmatica
- pt:
-
Nucleus paratenialis
- pvs:
-
Nucleus periventricularis stellatocellularis
- re:
-
Nucleus reuniens
- sc:
-
Nucleus suprachiasmaticus
- sl:
-
Nucleus septi lateralis
- so:
-
Nucleus supraopticus
- st:
-
Nucleus interstitialis striae terminalis
- tad:
-
Nucleus anterior dorsalis thalami
- tam:
-
Nucleus anterior medialis thalami
- tav:
-
Nucleus anterior ventralis thalami
- td:
-
Nucleus tractus diagonalis (Broca)
- th:
-
Nuclei thalami
- tl:
-
Nucleus lateralis thalami
- tlp:
-
Nucleus lateralis thalami, pars posterior
- tm:
-
Nucleus medialis thalami
- tml:
-
Nucleus medialis thalami, pars lateralis
- tmm:
-
Nucleus medialis thalami, pars medialis
- tpo:
-
Nucleus posterior thalami
- tr:
-
Nucleus reticularis thalami
- tv:
-
Nucleus ventralis thalami
- tvd:
-
Nucleus ventralis thalami, pars dorsomedialis
- tvm:
-
Nucleus ventralis medialis thalami, pars magnocellularis
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Stengaard-Pedersen, K., Larsson, L.I. Comparative immunocytochemical localization of putative opioid ligands in the central nervous system. Histochemistry 73, 89–114 (1981). https://doi.org/10.1007/BF00493136
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DOI: https://doi.org/10.1007/BF00493136