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Rapid Magnetic-microbead Method for Efficient Purification of Low-density Neutrophils

Rapid Magnetic-microbead Method for Efficient Purification of Low-density Neutrophils

Published on: November 11, 2025

Pentraxins and Fc receptors.

Jinghua Lu¹, Kristopher D Marjon, Carolyn Mold

¹Structural Immunology Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA.

Immunological Reviews

|October 11, 2012

Summary

Pentraxins, innate immune molecules, function like antibodies by binding pathogens and activating immune cells. This review highlights their crucial role in immunity beyond complement activation.

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Area of Science:

Immunology
Molecular Biology
Biochemistry

Background:

Pentraxins are innate pattern recognition molecules involved in host defense against pathogens and cellular debris.
Fc receptors mediate antibody functions, crucial for adaptive immunity.
Both pentraxins and antibodies play roles in managing acute and chronic inflammation and infections.

Purpose of the Study:

To review the structural and functional evidence linking innate pentraxins with adaptive Fc receptor functions.
To explore the broader role of pentraxins in immunity, extending beyond complement activation.
To establish pentraxins as innate counterparts to antibodies.

Main Methods:

Review of structural biology studies, including crystal structures of pentraxins with Fc receptors.
Analysis of functional assays demonstrating pentraxin-Fc receptor interactions and downstream signaling.
Comparison of binding affinities and activation mechanisms between pentraxins and antibodies.

Main Results:

Pentraxins recognize Fc receptors on cell surfaces and in solution with affinities comparable to antibodies.
Pentraxin aggregation and pathogen opsonization activate Fc receptors and macrophages.
Structural data reveals similarities between pentraxin-Fc receptor and antibody-Fc receptor recognition.

Conclusions:

Pentraxins possess functions analogous to antibodies, acting as 'innate antibodies'.
These findings suggest a more significant role for pentraxins in immune responses than previously understood.
The interplay between pentraxins and Fc receptors represents a key bridge between innate and adaptive immunity.