Abstract
Using an immunocytochemical technique, we have studied the distribution of fibers and cell bodies containing somatostatin-28 (1-12) [SOM-28 (1-12)], calcitonin gene-related peptide (CGRP), and substance P (SP) in the brainstem of Saimiri sciureus. The distribution of the peptidergic cell bodies was very restricted: perikarya containing SOM-28 (1-12) were only observed in the substantia grisea centralis, while no immunoreactive cell bodies containing CGRP or SP were visualized. Fibers containing SOM-28 (1-12), CGRP, or SP were widely distributed in the brainstem: immunoreactive fibers containing SOM-28 (1-12) showed the most widespread distribution and were the most abundant. The distribution of SOM-28 (1-12)-, CGRP- or SP-immunoreactive fibers was very similar. Colocalization of immunoreactive fibers containing SOM-28 (1-12), CGRP or SP was observed in many brainstem nuclei. A neuroanatomical relationship between CGRP- and SP-immunoreactive fibers was observed, although this relationship was less marked for SOM-28 (1-12) and SP and lower still for SOM-28 (1-12) and CGRP. The widespread distribution of the peptidergic fibers suggests that the studied neuropeptides are involved in many physiological actions.
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Abbreviations
- Ann:
-
Nucleus annularis
- AS:
-
Aquaeductus Sylvii
- BC:
-
Brachium conjunctivum
- BP:
-
Brachium pontis
- Cd:
-
Nucleus caudatus
- CD:
-
Nucleus cochlearis dorsalis
- Cn:
-
Nucleus cuneatus
- CnL:
-
Nucleus cuneatus lateralis
- CM:
-
Centrum medianum thalami
- CoS:
-
Colliculus superior
- CT:
-
Corpus trapezoideum
- CV:
-
Nucleus cochlearis ventralis
- DBC:
-
Decussatio brachii conjunctivi
- DG:
-
Nucleus dorsalis tegmenti (Gudden)
- DPy:
-
Decussatio pyramidum
- DR:
-
Nucleus dorsalis raphae
- DV:
-
Nucleus dorsalis nervi vagi
- FC:
-
Funiculus gracilis
- FRM:
-
Formatio reticularis myelencephali
- FRPo:
-
Formatio reticularis pontis oralis
- FRTM:
-
Formatio reticularis tegmenti mesencephali
- G:
-
Nucleus gracilis
- GC:
-
Substantia grisea centralis
- GCv:
-
Substantia grisea centralis, pars ventralis
- GL:
-
Corpus geniculatum lateralis
- GM:
-
Corpus geniculatum medialis
- GPo:
-
Griseum pontis
- IP:
-
Nucleus interpeduncularis
- LC:
-
Locus coeruleus
- LM:
-
Nucleus lemnisci lateralis
- LP:
-
Nucleus lateralis posterior thalami
- MD:
-
Nucleus medialis dorsalis thalami
- NCI:
-
Nucleus colliculi inferioris
- NCS:
-
Nucleus centralis superior tegmenti
- NIII:
-
Nucleus nervi oculomotorii
- nIV:
-
Nervus trochlearis
- NIV:
-
Nucleus nervi trochlearis
- NR:
-
Nucleus ruber
- NSv:
-
Nucleus tractus spinalis nervi trigemini
- NTS:
-
Nucleus tractus solitarii
- nV:
-
Nervus trigemini
- NVI:
-
Nucleus nervi abducentis
- NVII:
-
Nucleus nervi facialis
- nVIIIa:
-
Nervus acusticus
- NXII:
-
Nucleus nervi hypoglossi
- OI:
-
Nucleus olivaris inferior
- OIm:
-
Nucleus olivaris inferior, accessorius medialis
- OIp:
-
Nucleus olivaris inferior principalis
- OS:
-
Nucleus olivaris superior
- PbL:
-
Nucleus parabrachialis lateralis
- PbM:
-
Nucleus parabrachialis medialis
- pf:
-
Nucleus parafascicularis thalami
- Pp:
-
Nucleus praepositus
- PTc:
-
Nucleus praetectalis
- PuO:
-
Nucleus peripeduncularis oralis thalami
- Pv:
-
Nucleus principalis n. trigemini
- Py:
-
Tractus pyramidalis
- RL:
-
Nucleus reticularis lateralis myelencephali
- RPm:
-
Nucleus reticularis paramedianus myelencephali
- RTP:
-
Nucleus reticularis tegmenti pontis
- SNc:
-
Substantia nigra, pars compacta
- SNd:
-
Substantia nigra, pars diffusa
- TSc:
-
Tractus tectospinalis nervi trigemini
- TTS:
-
Tractus tectospinalis
- VesI:
-
Nucleus vestibularis inferior
- VesL:
-
Nucleus vestibularis lateralis
- VesM:
-
Nucleus vestibularis medialis
- VesS:
-
Nucleus vestibularis superior
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Acknowledgements
This work has been supported by the Universidad de Santander UDES, Bucaramanga (Colombia). The authors wish to thank Professor Gérard Tramu (Université de Bordeaux I, France) for the gift of primary antibodies, and the language service of the Universidad de Santander UDES (Colombia) for supervising the English text. This work is dedicated to Professor Julio Villalobos (Universidad del Valle, Cali, Colombia).
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Duque-Díaz, E., Coveñas, R. Distribution of somatostatin-28 (1-12), calcitonin gene-related peptide, and substance P in the squirrel monkey brainstem: an immunocytochemical study. Anat Sci Int 94, 86–100 (2019). https://doi.org/10.1007/s12565-018-0453-y
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DOI: https://doi.org/10.1007/s12565-018-0453-y