Related Experiment Video
Updated: Aug 22, 2026
Expression of Fluorescent Fusion Proteins in Murine Bone Marrow-derived Dendritic Cells and Macrophages
Published on: October 30, 2018
Expression of hemokinin 1 mRNA by murine dendritic cells
Daniel A Nelson1, Ian Marriott, Kenneth L Bost
1Department of Biology, University of North Carolina at Charlotte, 9201 University City Boulevard, Charlotte, NC 28223, USA.
Abstract:
Hemokinin 1 is encoded by preprotachykinin C (PPT-C) mRNA, and has been proposed as a regulator of B and T cell lymphopoiesis. Here we demonstrate the expression of mouse PPT-C mRNA by CD11b+ macrophages, CD11c+ dendritic cells and in the microglial cell line EOC 13.31. Expression was detected in freshly isolated CD11b+CD11c+ bone marrow cells, as well as in M-CSF expanded bone marrow-derived macrophages and GM-CSF expanded bone marrow-derived dendritic cells. There was preferential expression of PPT-C mRNA in dendritic cell subpopulations that were CD11b+, but not B220+ or GR-1+. These studies are the first to demonstrate PPT-C mRNA expression by cells of the myeloid lineage.
Insights
This study reveals that Hemokinin 1, encoded by preprotachykinin C (PPT-C) mRNA, is expressed in myeloid cells like macrophages and dendritic cells. This finding is the first to show PPT-C mRNA expression in the myeloid lineage.
Area of Science:
- Immunology
- Molecular Biology
- Cell Biology
Background:
- Hemokinin 1, encoded by preprotachykinin C (PPT-C) mRNA, has been implicated in regulating B and T cell lymphopoiesis.
- Previous research suggested a role for Hemokinin 1 in immune cell development.
Purpose of the Study:
- To investigate the expression of PPT-C mRNA in myeloid cell populations.
- To identify specific myeloid cell types that express PPT-C mRNA.
Main Methods:
- RT-PCR analysis of PPT-C mRNA expression in various mouse immune cells.
- Flow cytometry for cell surface marker identification (CD11b, CD11c, B220, GR-1).
- Culture of bone marrow-derived macrophages and dendritic cells.
Main Results:
- PPT-C mRNA was detected in CD11b+ macrophages, CD11c+ dendritic cells, and the microglial cell line EOC 13.31.
- Expression was confirmed in M-CSF expanded bone marrow-derived macrophages and GM-CSF expanded bone marrow-derived dendritic cells.
- Preferential PPT-C mRNA expression was observed in CD11b+ dendritic cell subpopulations, excluding B220+ or GR-1+ cells.
Conclusions:
- These findings represent the first demonstration of PPT-C mRNA expression in cells of the myeloid lineage.
- The expression of PPT-C mRNA in macrophages and dendritic cells suggests a potential role for Hemokinin 1 in myeloid cell function and immune regulation.
