CXCL9 and CXCL11 enhance excitatory synaptic transmission in lamina II neurons. (a) Whole-cell patch clamp recording of sEPSCs shows an increase in the frequency of sEPSCs after perfusion of CXCL9 (100 ng/ml, 2 min). However, the amplitude was not changed after perfusion of CXCL9. a1 and a2 are enlarged traces before and after CXCL9 treatment, respectively. ***p < 0.001 versus pretreatment baseline, Student’s t test, n = 5–6 mice/group. (b) sEPSCs frequency not amplitude is increased after perfusion of CXCL11 (100 ng/ml, 2 min). b1 and b2 are enlarged traces before and after CXCL11 treatment, respectively. **p < 0.01 versus pretreatment baseline, Student’s t test, n = 5–6 mice/group. (c) Miniature EPSCs (mEPSCs) were recorded in the present of TTX (500 nM). The mEPSCs frequency, not the amplitude is increased after perfusion of CXCL9 (100 ng/ml, 2 min). c1 and c2 are enlarged traces before and after CXCL9 treatment, respectively. *p < 0.05 versus pretreatment baseline, Student’s t test, n = 3 mice/group. (d) mEPSCs frequency, not the amplitude is increased after incubation of CXCL11. d1 and d2 are enlarged traces before and after CXCL11 treatment, respectively. * p < 0.05 versus pretreatment baseline, Student's t test, n = 3 mice/group.