TGFB1 and infection: However, overexpression of CARP resulted in a MOI-dependent inhibition of TGF-β1 release in response to phenylephrine; a 50% decrease was evident at an MOI of 50 compared with the level seen when an equivalent amount of control GFP-expressing virus was used for infection (0.97±0.11 fold in the CARP MOI 50/PE test vs 1.92±0.28 fold in the GFP MOI 50/PE control; P<0.05).