Distribution of galanin receptor 2b neurons and interaction with galanin in the zebrafish central nervous system

Eunmi Kim, Inyoung Jeong, Suhyun Kim, Hwan Ki Kim, Dong Won Lee, Boa Kim, Jae Young Seong, Young Ki Bae, Jae Ho Ryu, Hae Chul Park

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Galanin is a multifunctional neuropeptide that is implicated in the modulation of physiological processes, including nociception, cognition, feeding behavior, neuronal growth, and reproduction. The physiological effects of galanin are mediated through its interaction with three different G protein-coupled receptors, i.e., GALR1, GALR2, and GALR3. Unlike mammals, zebrafish have four different receptors for galanin, diversified from GALR1 (GAL1a and GALR1b) and GALR2 (GALR2a and GALR2b). Despite the importance of galanin in the central nervous system (CNS), no information has been reported regarding GalR2 in zebrafish CNS. In this study, we found that galr2a is expressed at low levels in restricted areas of the brain; however, galr2b was widely expressed in CNS including olfactory bulb, midbrain tegmentum, preoptic region, dorsal thalamus, posterior tuberculum, postoptic commissure, hindbrain, and spinal cord. To further analyze the distribution of GALR2b neurons and their interaction with GAL, we generated Tg(galr2b:egfp) zebrafish, which express enhanced green fluorescent protein (EGFP) under the control of a galr2b promoter. Investigation of the CNS of transgenic reporter zebrafish revealed that galr2b:EGFP+ neurons are distributed and interact with galanin-immunoreactive (galanin-IR) cells in various regions of the brain and spinal cord. We found that in some regions of the brain and spinal cord, galanin-IR nerve cells were not observed near galr2b:EGFP neurons, suggesting that GALR2b may have the potential to interact with other ligands instead of galanin in these regions.

Original languageEnglish
Pages (from-to)153-160
Number of pages8
JournalNeuroscience Letters
Volume628
DOIs
Publication statusPublished - 2016 Aug 15

Fingerprint

Galanin Receptors
Galanin
Zebrafish
Central Nervous System
Neurons
Spinal Cord
Receptor, Galanin, Type 1
Brain
Tegmentum Mesencephali
Physiological Phenomena
Rhombencephalon
Nociception
Olfactory Bulb
Feeding Behavior
G-Protein-Coupled Receptors
Neuropeptides
Thalamus
Cognition
Reproduction
Mammals

Keywords

  • Central nervous system
  • Galanin
  • Galanin receptor
  • Neuropeptide
  • Zebrafish

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Distribution of galanin receptor 2b neurons and interaction with galanin in the zebrafish central nervous system. / Kim, Eunmi; Jeong, Inyoung; Kim, Suhyun; Kim, Hwan Ki; Lee, Dong Won; Kim, Boa; Seong, Jae Young; Bae, Young Ki; Ryu, Jae Ho; Park, Hae Chul.

In: Neuroscience Letters, Vol. 628, 15.08.2016, p. 153-160.

Research output: Contribution to journalArticle

Kim, Eunmi ; Jeong, Inyoung ; Kim, Suhyun ; Kim, Hwan Ki ; Lee, Dong Won ; Kim, Boa ; Seong, Jae Young ; Bae, Young Ki ; Ryu, Jae Ho ; Park, Hae Chul. / Distribution of galanin receptor 2b neurons and interaction with galanin in the zebrafish central nervous system. In: Neuroscience Letters. 2016 ; Vol. 628. pp. 153-160.
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AU - Kim, Eunmi

AU - Jeong, Inyoung

AU - Kim, Suhyun

AU - Kim, Hwan Ki

AU - Lee, Dong Won

AU - Kim, Boa

AU - Seong, Jae Young

AU - Bae, Young Ki

AU - Ryu, Jae Ho

AU - Park, Hae Chul

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