For ACT/TIL - less IL-2 works better. Did I read that right?

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6/2/2014 12:54pm
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So If I read this right which comes from NCT01468818 the patients who do less IL-2 bags have a better response than the ones who do more bags? At least for this type of treatment. Did I read that right?

"In our prior clinical trials of cell transfer using TIL after lymphodepletion with or without

2Gy total body irradiation, patients who experienced an objective response received fewer doses of IL-2 compared to non-responders (p=0.007 and 0.03 respectively)."

I had to read it a couple times too but I think that's what they are saying. 

 

"IL-2 administration has been shown to increase the number of T regulatory cells and in our trials we have found a direct relationship between the number of IL-2 doses and the reconstitution of patients at one week with CD4+ Foxp3+ T regulatory cells.
 
In our analysis of factors that relate to the ability of this treatment to mediate objective responses, we have found a highly significant inverse correlation between reconstitution of CD4+ Foxp3+ T regulatory cells and the likelihood of achieving an objective response.
 
In our prior clinical trials of cell transfer using TIL after lymphodepletion with or without 2Gy total body irradiation, patients who experienced an objective response received fewer doses of IL-2 compared to non-responders (p=0.007 and 0.03 respectively).
 
High levels of the homeostatic T cell growth factor, IL-15, are present in patient serum after the lymphodepleting regimen at the time of cell transfer.
 
These factors raise the possibility that IL-2 administration is not required after cell transfer."