TRPV1 and central nervous system cancer: To evaluate which TRPV1 5'UTR variant was expressed in glioma samples, we analyzed the expression of TRPV1 5'UTR variants in different glioma biopsies, from grade I to IV (n = 84) obtained from mixed patients (Supplementary Table 2), in normal brain (NB; n= 3) and in normal human astrocytes (NHA; n = 3) samples, by RT/PCR analysis.