Related Experiment Videos
[Expression and bioactivity analysis of staphylococcal enterotoxin C2]
Qiao Xue1, Yue-Bin Ying, Ying-Qiu Pan
1Department of Biopharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310031, China.
Yao Xue Xue Bao = Acta Pharmaceutica Sinica
|July 20, 2006
Summary
The staphylococcal enterotoxin C2 (SEC2) gene was cloned and expressed as a soluble protein in E. coli. This recombinant SEC2 protein effectively activated mouse lymphocytes, leading to significant tumor cell death.
Area of Science:
- Microbiology
- Immunology
- Biotechnology
Background:
- Staphylococcal enterotoxins are potent immune activators.
- Understanding the specific functions of staphylococcal enterotoxin C2 (SEC2) is crucial for potential therapeutic applications.
Purpose of the Study:
- To clone and express the staphylococcal enterotoxin C2 (SEC2) gene as a soluble fusion protein in E. coli.
- To investigate the immunomodulatory effects of SEC2 on mouse lymphocytes.
- To evaluate the anti-tumor activity mediated by SEC2-activated lymphocytes.
Main Methods:
- Cloning of the SEC2 gene into a GST fusion vector (pGEX-4T-1).
- Expression and purification of the GST-SEC2 fusion protein in E. coli BL21.
- Thrombin digestion to obtain recombinant SEC2 (rSEC2).
- In vitro lymphocyte activation assays and assessment of tumor cell cytotoxicity.
Main Results:
- Successful cloning and expression of the SEC2 gene, yielding purified rSEC2.
- rSEC2 demonstrated a dose-dependent stimulation of mouse lymphocyte proliferation.
- Activated lymphocytes exhibited potent cytotoxic effects against B16, K562, and K562-AD tumor cells.
Conclusions:
- The cloned and expressed rSEC2 protein effectively activates mouse lymphocytes.
- rSEC2-induced lymphocyte activation leads to significant tumor cell lysis.
- This study provides a foundation for exploring SEC2 as a potential immunotherapeutic agent against specific tumors.