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Culturing and Maintaining Clostridium difficile in an Anaerobic Environment
Published on: September 15, 2013
Simplified purification method for Clostridium difficile toxin A
Si-Wu Fu1, Jing Xue, Ya-Li Zhang
1PLA Institute for Digestive Medicine, Nanfang Hospital, First Military Medical University, Guangzhou 510515, Guangdong Province, China. fusiwu2001@sina.com
World Journal of Gastroenterology
|August 17, 2004
Summary
A new method simplifies the purification of Clostridium difficile (C. difficile) toxin A. This enhanced purification technique is efficient and suitable for large-scale toxin A production.
Area of Science:
- Microbiology
- Biochemistry
Background:
- Clostridium difficile infections are a significant healthcare concern.
- Toxin A is a key virulence factor of C. difficile.
Purpose of the Study:
- To develop and optimize a purification method for Clostridium difficile toxin A.
Main Methods:
- Anaerobic culture of C. difficile filtrate using dialysis bags.
- Purification via ammonium sulfate precipitation, acid precipitation, and ion-exchange chromatography (DEAE-Toyopearl).
Main Results:
- Single band on native-PAGE and Ouchterlony double immunodiffusion confirmed toxin A purity.
- Estimated molecular weight of 550,000.
- Characterization of purified toxin A including protein concentration, lethal dose, cytotoxic titer, and haemagglutinate activity.
Conclusions:
- The modified purification method is simple, convenient, and effective.
- This method shows potential for large-scale purification of C. difficile toxin A.
