Hi Everybody,

I buy and try the pGreenFire construct to check the activity of P53. (3rd generation lentivirus for people who have issue to find the info).

I transfected and selected for my RPE1 cells, and then tried their p53 activities with 10Gy of radiation. I tested  for 1 & 3 hours post-radiation:

1h: P53 protein level increase of 4fold and p21 by 2 folds (westernblot) but luciferase activity increase at 1.02 fold....

3h: P53 protein level increase 1.43 fold and p21 at 5 fold but luciferase 1.39 fold increase (Standart deviation is big but statistically significant).

GFP fluorescence is really heterogeneous and after radiation, I don't see an increase.

I just wanted to comment it in case some people wanted to have information about the construct before buying it. In my hand, it is not worth because of low sensitivity... I did not find any useful information in internet before buying it, so I just wanted to share my experience.

If someone have nice suggestions of how to compare p53 activity (rather than a westernblot of p21 target) in 2 different conditions, I will be happy to listen it!!

Thanks

val

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