The myofibroblast is a source of angiogenin (265 ± 5 pg/ml in serum-free media after 24 h), quantified by ELISA. n ≥ 3. B. Confluent 18Co cells were equilibrated in serum-free media for 30min, then exposed to TNF-α (10 ng/ml) ± BK (100 nM) in the presence or absence of 26-2F, a neutralizing ANG antibody, for up to 4h. C. The relative levels of pPKD and COX-2 levels (D) following exposure to TNF-α (10 ng/ml) ± BK (100 nM) are shown graphically, expressed as the mean ± S.E. n ≥ 3.