Table 2.

Desensitization of CXCR3 by CD26/DPP IV–truncated chemokines

First stimulus*Second stimulusDesensitization(%)
10 nM IP-10(3-77) 1 nM IP-10(1-77) 37 
 0.3 nM IP-10(1-77) 39  
 50 nM Mig(1-103) 34 
 0.3 nM I-TAC(1-73) 29  
3 nM I-TAC(3-73) 0.3 nM IP-10(1-77) 31  
 0.3 nM I-TAC(1-73) 32 
First stimulus*Second stimulusDesensitization(%)
10 nM IP-10(3-77) 1 nM IP-10(1-77) 37 
 0.3 nM IP-10(1-77) 39  
 50 nM Mig(1-103) 34 
 0.3 nM I-TAC(1-73) 29  
3 nM I-TAC(3-73) 0.3 nM IP-10(1-77) 31  
 0.3 nM I-TAC(1-73) 32 
*

The first stimulus did not induce an increase of the intracellular calcium concentration.

Compared to CXCR3-transfected CHO cells that were treated with calcium buffer as a first stimulus (average percent desensitization of 2-4 independent experiments).

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