High-resolution characterization of a PACAP-EGFP transgenic mouse model for mapping PACAP-expressing neurons

Michael C. Condro, Anna Matynia, Nicholas N. Foster, Yukio Ago, Abha K. Rajbhandari, Christina Van, Bhavaani Jayaram, Sachin Parikh, Anna L. Diep, Eileen Nguyen, Victor May, Hong Wei Dong, James A. Waschek

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Pituitary adenylate cyclase-activating polypeptide (PACAP, gene name Adcyap1) regulates a wide variety of neurological and physiological functions, including metabolism and cognition, and plays roles in of multiple forms of stress. Because of its preferential expression in nerve fibers, it has often been difficult to trace and identify the endogenous sources of the peptide in specific populations of neurons. Here, we introduce a transgenic mouse line that harbors in its genome a bacterial artificial chromosome containing an enhanced green fluorescent protein (EGFP) expression cassette inserted upstream of the PACAP ATG translation initiation codon. Analysis of expression in brain sections of these mice using a GFP antibody reveals EGFP expression in distinct neuronal perikarya and dendritic arbors in several major brain regions previously reported to express PACAP from using a variety of approaches, including radioimmunoassay, in situ hybridization, and immunohistochemistry with and without colchicine. EGFP expression in neuronal perikarya was modulated in a manner similar to PACAP gene expression in motor neurons after peripheral axotomy in the ipsilateral facial motor nucleus in the brainstem, providing an example in which the transgene undergoes proper regulation in vivo. These mice and the high-resolution map obtained are expected to be useful in understanding the anatomical patterns of PACAP expression and its plasticity in the mouse. J. Comp. Neurol. 524:3827–3848, 2016.

Original languageEnglish
Pages (from-to)3827-3848
Number of pages22
JournalJournal of Comparative Neurology
Issue number18
StatePublished - 15 Dec 2016
Externally publishedYes


  • Adcyap1
  • RRID:AB_10049744
  • RRID:AB_10058149
  • RRID:AB_10073917
  • RRID:AB_10563748
  • RRID:AB_10680176
  • RRID:AB_177621
  • RRID:AB_177621
  • RRID:AB_2336201
  • RRID:IMSR_MMRRC:012011
  • RRID:SciRes_000137
  • RRID:nlx_143660
  • central nervous system
  • facial nerve axotomy
  • neuropeptide
  • pituitary adenylyl cyclase-activating polypeptide
  • reporter mouse


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