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Related Experiment Video

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Fast and Efficient Expression of Multiple Proteins in Avian Embryos Using mRNA Electroporation

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Formyl peptide receptor expression in birds.

M A Panaro¹, A Cianciulli, S Lisi

¹Department of Human Anatomy and Histology, University of Bari, Bari, Italy. ma.panaro@anatomia.uniba.it

Immunopharmacology and Immunotoxicology

|April 28, 2007

Summary

N-formyl-methionyl-leucyl-phenylalanine (fMLP) in chick embryo brain cells triggers immune responses, suggesting avian G-protein-coupled receptors may function as fMLP receptors, similar to mammals.

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Area of Science:

Immunology
Neuroscience
Cell Biology

Background:

N-formyl-methionyl-leucyl-phenylalanine (fMLP) is a key bacterial chemotactic factor.
Human N-formyl peptide receptors (FPRs) mediate fMLP signaling via G-protein-coupled receptors (GPCRs).
Avian FPRs and fMLP effects remain largely uncharacterized.

Purpose of the Study:

To investigate the effects of fMLP on avian brain cells.
To explore the potential presence and function of fMLP receptors in birds.

Main Methods:

Primary cell cultures from 10-day chick embryo brains were stimulated with fMLP.
Assays included superoxide anion and nitric oxide release, protein phosphorylation, and pertussis toxin treatment.
Immunoblotting with anti-human FPR1 antibody and sequence homology searches were performed.

Main Results:

fMLP induced superoxide anion and nitric oxide release and protein phosphorylation in avian brain cells.
These responses were inhibited by pertussis toxin, indicating GPCR involvement.
Anti-human FPR1 antibody bound to avian brain cell membranes, and avian GPCRs showed homology to human FPR1.

Conclusions:

Avian brain cells respond to fMLP, suggesting functional FPRs.
Avian 7-transmembrane (7TM) GPCRs, potentially chemokine receptors like CXCR4, may act as fMLP receptors in birds.