Quantified Coexpression Analysis of Central Amygdala Subpopulations

eNeuro. 2018 Feb 6;5(1):ENEURO.0010-18.2018. doi: 10.1523/ENEURO.0010-18.2018. eCollection Jan-Feb 2018.

Abstract

Molecular identification and characterization of fear controlling circuitries is a promising path towards developing targeted treatments of fear-related disorders. Three-color in situ hybridization analysis was used to determine whether somatostatin (SOM, Sst), neurotensin (NTS, Nts), corticotropin-releasing factor (CRF, Crf), tachykinin 2 (TAC2, Tac2), protein kinase c-δ (PKC-δ, Prkcd), and dopamine receptor 2 (DRD2, Drd2) mRNA colocalize in male mouse amygdala neurons. Expression and colocalization was examined across capsular (CeC), lateral (CeL), and medial (CeM) compartments of the central amygdala. The greatest expression of Prkcd and Drd2 were found in CeC and CeL. Crf was expressed primarily in CeL, while Sst-, Nts-, and Tac2-expressing neurons were distributed between CeL and CeM. High levels of colocalization were identified between Sst, Nts, Crf, and Tac2 within the CeL, while little colocalization was detected between any mRNAs within the CeM. These findings provide a more detailed understanding of the molecular mechanisms that regulate the development and maintenance of fear and anxiety behaviors.

Keywords: Amygdale; Coexpression; Crf; Nts; Prkcd; Somatostatin; Sst; Tac2; fear.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Central Amygdaloid Nucleus / metabolism*
  • Corticotropin-Releasing Hormone / metabolism
  • Fear / physiology*
  • Male
  • Mice, Inbred C57BL
  • Neurons / metabolism*
  • Neurotensin / metabolism
  • Protein Kinase C-delta / metabolism
  • Protein Precursors / metabolism
  • RNA, Messenger / metabolism
  • Receptors, Dopamine D2 / metabolism
  • Somatostatin / metabolism
  • Tachykinins / metabolism

Substances

  • DRD2 protein, mouse
  • Protein Precursors
  • RNA, Messenger
  • Receptors, Dopamine D2
  • Tachykinins
  • preprotachykinin
  • Neurotensin
  • Somatostatin
  • Corticotropin-Releasing Hormone
  • Protein Kinase C-delta