The MUB40 Peptide for Use in Detecting Neutrophil-Mediated Inflammation Events

Area of Science:

• Immunology
• Cell Biology
• Biochemistry

Background:

• Neutrophil detection is crucial for understanding immune responses.
• Current methods using species-specific antibodies have limitations in certain applications.
• Lactoferrin, abundant in neutrophil granules, is a potential target for detection.

Purpose of the Study:

• To introduce a novel peptide, MUB40, for detecting neutrophils.
• To detail a protocol for using MUB40 in fixed and live-cell imaging of neutrophils.
• To enable the study of neutrophil activation and degranulation.

Main Methods:

• Synthesis of MUB40 peptide.
• Conjugation of MUB40 to a fluorophore.
• Application of MUB40 for staining neutrophils in fixed/permeabilized tissues.
• Utilizing MUB40 in live-cell imaging for neutrophil activation assays.

Main Results:

• MUB40 effectively stains neutrophils by binding to glycosylated lactoferrin.
• MUB40 is excluded from non-activated/non-permeabilized neutrophils due to its inability to penetrate the cell membrane.
• MUB40 demonstrates broad host-range recognition of lactoferrin.
• The peptide allows for simplified, single-step staining protocols.

Conclusions:

• MUB40 provides a novel, broadly applicable reagent for neutrophil detection and activation studies.
• This peptide overcomes limitations of species-specific antibodies, facilitating cross-species research.
• The MUB40 protocol simplifies experimental procedures and reduces reagent redundancy.