A, Janex-1 attenuated PDGF-BB-induced phosphorylation of STAT3 and JNK. B and C, Quantification of pSTAT3 and pJNK protein expression shown in A by normalizing to α-Tubulin level. *P < 0.05 vs vehicle-treated cells (−); #P < 0.05 vs PDGF-BB-treated groups for each individual protein, respectively, n=3. D, Knockdown of JAK3 by shRNA (Ad-shJAK3) attenuated PDGF-BB-induced STAT3 and JNK phosphorylation. E and F, Quantification of pJAK3, pSTAT3 and pJNK levels shown in D by normalizing to α-Tubulin level, respectively. *P < 0.05 vs scramble shRNA (Ad-shScr)-transduced cells; #P < 0.05 vs Ad-shScr-transduced cells with PDGF-BB, for each individual protein, respectively, n=3.