Related Experiment Video
Updated: Jun 10, 2026
09:45
In Vitro Canine Neutrophil Extracellular Trap Formation: Dynamic and Quantitative Analysis by Fluorescence Microscopy
Published on: August 24, 2018
Pentraxins in innate immunity: lessons from PTX3
Livija Deban1, Sebastien Jaillon, Cecilia Garlanda
1Istituto Clinico Humanitas IRCCS, Via Manzoni 113, 20089 Rozzano, Milan, Italy.
Cell and Tissue Research
|August 5, 2010
Summary
The humoral innate immune system uses soluble pattern recognition molecules (PRMs) like pentraxins to identify threats. Long pentraxin PTX3, produced by immune cells, is crucial for regulating inflammation and tissue repair.
Area of Science:
- Immunology
- Molecular Biology
Background:
- The innate immune system is the body's first defense against pathogens.
- It comprises cellular and humoral components, including soluble pattern recognition molecules (PRMs).
- PRMs are crucial for distinguishing self from non-self and regulating immune responses.
Purpose of the Study:
- To explore the role of pentraxins, key components of humoral innate immunity.
- To highlight the significance of long pentraxin PTX3 in immune regulation.
Main Methods:
- Review of existing literature on innate immunity and pentraxins.
- Analysis of the structural and functional characteristics of short and long pentraxins.
- Examination of PTX3's production, interactions, and functions.
Main Results:
- Pentraxins, including short (C-reactive protein, serum amyloid P-component) and long (PTX3) forms, are vital humoral innate immunity components.
- PTX3, produced by innate immune cells, interacts with various ligands.
- PTX3 plays a key role in modulating inflammation and matrix deposition.
Conclusions:
- Soluble PRMs, exemplified by pentraxins, are essential for innate immunity.
- PTX3 serves as a model for understanding the mechanisms of humoral innate immunity.
- PTX3's functions in inflammation and tissue repair underscore its importance.
Related Concept Videos
01:23Antimicrobial Proteins
Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
01:16Transduction
Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome are...
01:12Bacterial Toxins
Bacterial toxins are sophisticated virulence factors that enable pathogenic bacteria to interact with, invade, and damage host tissues. These toxins fall broadly into two types: protein exotoxins, which are secreted into the environment and target specific host receptors, and lipopolysaccharide endotoxins, which are structural components of the bacterial outer membrane released primarily during bacterial lysis or membrane shedding. Exotoxins generally act more selectively, binding to cell...
01:28Gene Regulation in Microbial Communities: Quorum Sensing
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
01:23Inhibitors of Gram-positive Cell Wall Synthesis
Bacterial cell walls are typically rigid structures composed mainly of peptidoglycan, a mesh-like polymer that provides mechanical strength and maintains cell shape. The synthesis of peptidoglycan is a crucial process in bacterial growth and serves as a primary target for many antibiotics.Mechanism of Action of Beta-Lactam AntibioticsBeta-lactam antibiotics, such as penicillin, inhibit peptidoglycan synthesis in actively growing cells. These antibiotics share a characteristic four-membered...
01:25Mechanism of Antibiotic Resistance in MRSA
Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...