TH2 Cells From the article it seems that VEGF is implicated in asthma via the production of TH2 cells. The inhibition of TH2 action is a common thread in a number of drug candidates. CAT, for example, is in a pI aimed at IL13, for example. The link below points to a good referrence for keeping those cytokines straight 8-) <A HREF="http://www.copewithcytokines.de/cope.cgi" target="_blank">http://www.copewithcytokines.de/cope.cgi</A>