Characterization of Gastric and Neuronal Histaminergic Populations Using a Transgenic Mouse Model

Angela K. Walker, Won Mee Park, Jen Chieh Chuang, Mario Perello, Ichiro Sakata, Sherri Osborne-Lawrence, Jeffrey M. Zigman

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12 Scopus citations

Abstract

Histamine is a potent biogenic amine that mediates numerous physiological processes throughout the body, including digestion, sleep, and immunity. It is synthesized by gastric enterochromaffin-like cells, a specific set of hypothalamic neurons, as well as a subset of white blood cells, including mast cells. Much remains to be learned about these varied histamine-producing cell populations. Here, we report the validation of a transgenic mouse line in which Cre recombinase expression has been targeted to cells expressing histidine decarboxylase (HDC), which catalyzes the rate-limiting step in the synthesis of histamine. This was achieved by crossing the HDC-Cre mouse line with Rosa26-tdTomato reporter mice, thus resulting in the expression of the fluorescent Tomato (Tmt) signal in cells containing Cre recombinase activity. As expected, the Tmt signal co-localized with HDC-immunoreactivity within the gastric mucosa and gastric submucosa and also within the tuberomamillary nucleus of the brain. HDC expression within Tmt-positive gastric cells was further confirmed by quantitative PCR analysis of mRNA isolated from highly purified populations of Tmt-positive cells obtained by fluorescent activated cell sorting (FACS). HDC expression within these FACS-separated cells was found to coincide with other markers of both ECL cells and mast cells. Gastrin expression was co-localized with HDC expression in a subset of histaminergic gastric mucosal cells. We suggest that these transgenic mice will facilitate future studies aimed at investigating the function of histamine-producing cells.

Original languageEnglish (US)
Article numbere60276
JournalPloS one
Volume8
Issue number3
DOIs
StatePublished - Mar 29 2013

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ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

Cite this

Walker, A. K., Park, W. M., Chuang, J. C., Perello, M., Sakata, I., Osborne-Lawrence, S., & Zigman, J. M. (2013). Characterization of Gastric and Neuronal Histaminergic Populations Using a Transgenic Mouse Model. PloS one, 8(3), [e60276]. https://doi.org/10.1371/journal.pone.0060276