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蛋白活性實(shí)驗(yàn)-TNF-a活性蛋白

蛋白活性實(shí)驗(yàn)-TNF-a活性蛋白

TNF-a是內(nèi)源性的熱原,能夠引起發(fā)熱、凋亡細(xì)胞死亡、炎癥和抑制腫瘤發(fā)生。據(jù)報(bào)道,TNF-a可以抑制A549細(xì)胞的增殖和誘導(dǎo)凋亡,在刺激后細(xì)胞上清液中IL-1的濃度會增加。

 

實(shí)驗(yàn)方法:因此,A549細(xì)胞在DMEM孵化TNFa(1 ng / mL,10 ng / mL)2 h,4 h,8 h,24小時(shí)、48小時(shí),然后細(xì)胞被倒置顯微鏡觀察,IL-1β被ELISA檢測細(xì)胞上清液中。

 

實(shí)驗(yàn)結(jié)果TNF-a (10ng/mL)孵育72h后觀察細(xì)胞凋亡(見圖一)。

 

 

A                                                     B

Figure 1. Effect of TNF-a on A549 cells.

(A) A549 cells cultured in DMEM, stimulated with 10ng/mL TNF-a for 72h;

(B) (B)Unstimulated A549 cells cultured in DMEM for 72h.

 

TNF-a孵化后(10 ng / mL)8 h,IL-1β顯著增加的細(xì)胞上清液(見表一)。

 

Sample (cell supernatant of A549 cells)

O.D. value

Corrected

Concentration of IL-1β (ng/mL)

stimulated with TNF-β (10ng/mL)

1.210

1.046

52.0

unstimulated

0.187

0.023

4.9

Table1.Effect of TNF-β on A549 cells by ELISA.

STD (ng/mL)

O.D. value

Corrected

150

3.363

3.199

75

1.630

1.466

37.5

0.974

0.810

18.75

0.442

0.278

9.375

0.271

0.107

4.6875

0.180

0.016

2.34375

0.168

0.004

 




The standard curve was demonstrated as follows