Related Experiment Video

Updated: Oct 11, 2025

Antigen-Capture Enzyme-Linked Immunosorbent Assay for Specific Detection of Mycoplasma pneumoniae
06:04

Antigen-Capture Enzyme-Linked Immunosorbent Assay for Specific Detection of Mycoplasma pneumoniae

Published on: February 24, 2023

2.6K

Community-Acquired Respiratory Distress Syndrome Toxin: Unique Exotoxin for M. pneumoniae

Xiaoling Su1, Xiaoxing You2, Haodang Luo1

  • 1The Affiliated Nanhua Hospital, Department of Clinical Laboratory, Hengyang Medical School, University of South China, Hengyang, China.

Frontiers in Microbiology
|December 6, 2021
PubMed

Insights

Mycoplasma pneumoniae infection causes respiratory illness. Its exotoxin, CARDS TX, triggers inflammation and cell damage, offering targets for new treatments and vaccines.

Area of Science:

  • Microbiology
  • Immunology
  • Toxicology

Background:

  • Mycoplasma pneumoniae is a common cause of respiratory infections, including atypical and community-acquired pneumonia (CAP).
  • CARDS TX is the sole exotoxin produced by M. pneumoniae, known for its ADP-ribosyltransferase (ADPRT) activity and role in cellular vacuolization.
  • CARDS TX exacerbates respiratory conditions like asthma and COPD when co-infecting.

Purpose of the Study:

  • To review the structural features, functional activities, and cellular mechanisms of CARDS TX.
  • To elucidate the entry pathways and inflammatory effects of CARDS TX within host cells.
  • To provide insights for developing clinical diagnostics and vaccines against M. pneumoniae.

Main Methods:

  • Review of existing literature on CARDS TX structure and function.
  • Analysis of studies detailing CARDS TX's interaction with host cells and receptors.
  • Examination of research on CARDS TX-induced inflammatory responses and pathogenic effects.

Main Results:

  • CARDS TX possesses ADPRT activity and induces cell vacuolization, swelling, and mucus hypersecretion.
  • The toxin enters host cells via receptor binding and is translocated to the endoplasmic reticulum.
  • CARDS TX triggers significant inflammatory responses, contributing to disease pathogenesis.

Conclusions:

  • CARDS TX is a key virulence factor in Mycoplasma pneumoniae infections.
  • Understanding CARDS TX's mechanism of action is crucial for therapeutic and diagnostic advancements.
  • This review provides a foundation for future research into M. pneumoniae pathogenesis and control strategies.
Keywords:
ADP-ribosyltransferaseMycoplasma pneumoniaeasthmacommunity acquired respiratory distress syndrome toxinvacuolization

More Related Videos

Following in Real Time the Impact of Pneumococcal Virulence Factors in an Acute Mouse Pneumonia Model Using Bioluminescent Bacteria11:32

Following in Real Time the Impact of Pneumococcal Virulence Factors in an Acute Mouse Pneumonia Model Using Bioluminescent Bacteria

Published on: February 23, 2014

15.2K
Methods for Detecting Cytotoxic Amyloids Following Infection of Pulmonary Endothelial Cells by Pseudomonas aeruginosa07:27

Methods for Detecting Cytotoxic Amyloids Following Infection of Pulmonary Endothelial Cells by Pseudomonas aeruginosa

Published on: July 12, 2018

5.7K

Related Concept Videos

Pneumonia I: Introduction01:30

Pneumonia I: Introduction

Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
387
Pneumonia II: Pathophysiology01:29

Pneumonia II: Pathophysiology

The pathophysiology of pneumonia involves the following steps:
923
Pneumonia III: Complications and Assessment01:30

Pneumonia III: Complications and Assessment

Pneumonia poses the potential for numerous complications that warrant consideration. These complications include the following:
523
Special Staining Techniques01:13

Special Staining Techniques

Specialized staining techniques play a vital role in microbiology by enabling the visualization of specific bacterial structures that remain undetectable with standard microscopy methods. These techniques not only enhance the structural visualization of bacterial cells but also provide critical insights into their pathogenicity and classification. Additionally, they support diagnostic and research endeavors in microbiology by identifying key bacterial features.Capsule Staining for Virulence...
581
Other Unique Bacteria01:18

Other Unique Bacteria

Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic...
131
Gene Regulation in Microbial Communities: Quorum Sensing01:28

Gene 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,...
131