Click-chemistry-based protocol for detecting 4-octyl-itaconate-alkylated proteins in primary mouse macrophages

Area of Science:

• Biochemistry
• Immunology
• Molecular Biology

Background:

• Inflammation is a key biological process implicated in numerous diseases.
• 4-Octyl itaconate (4-OI) is a known anti-inflammatory agent that functions by alkylating target proteins.
• Understanding the specific protein targets of 4-OI is crucial for developing targeted therapies.

Purpose of the Study:

• To develop and present a novel click-chemistry-based protocol for the detection of 4-OI-alkylated proteins.
• To enable the identification of specific protein targets modified by 4-OI in immune cells.

Main Methods:

• The protocol involves culturing mouse primary bone-marrow-derived macrophages (BMDMs).
• Cells are treated with 4-OI and subsequently with an itaconate-alkyne (ITalk) probe.
• Click chemistry is employed in cell lysates to label the probe, followed by western blot detection of alkylated proteins.

Main Results:

• The study successfully established a protocol for detecting 4-OI-alkylated proteins.
• The ITalk probe, in conjunction with click chemistry, allows for specific identification of modified proteins.

Conclusions:

• This click-chemistry-based method provides a reliable way to detect 4-OI-modified proteins in BMDMs.
• The protocol facilitates the study of 4-OI's mechanism of action at the protein level, aiding in the development of anti-inflammatory strategies.