Enhancement of human neutrophil survival and activation by TGF-beta 1.
Transforming growth factor beta (TGF-beta) is a multifunctional growth factor which promotes the inflammatory process. We have investigated the effect of TGF-beta 1 on neutrophil survival, recruitment and activation. These last steps are essential for their participation in the inflammatory response. Our results demonstrate that TGF-beta 1 at a concentration of 20-40 ng/ml is a potent neutrophil chemotactic factor. The chemotactic activity induced by TGF-beta 1 is greater than that induced by fMLP (10(-8) M). Furthermore, TGF-beta 1 (20-30 ng/ml) induces neutrophil activation demonstrated by an increase of respiratory burst and phagocytosis. Finally, TGF-beta 1 also enhances human neutrophil survival (43 to 93%) at concentrations as low as 2 to 20 ng/ml. This study provides evidence that TGF-beta 1 is capable of recruiting and activating neutrophils at inflammatory sites and enhances their survival.
Lagraoui
M
M
BioChem Therapeutics, Laval, Québec, Canada.
Gagnon
L
L
D002470:Cell Survival / Q000187:drug effects; D002630:Chemotactic Factors / Q000494:pharmacology; D006801:Humans; D066298:In Vitro Techniques; D007249:Inflammation / Q000209:etiology; D009504:Neutrophils / Q000166:cytology / Q000187:drug effects* / Q000502:physiology; D010587:Phagocytosis / Q000187:drug effects; D011994:Recombinant Proteins / Q000494:pharmacology; D016897:Respiratory Burst / Q000187:drug effects; D016212:Transforming Growth Factor beta / Q000494:pharmacology*
D002630:Chemotactic Factors; D011994:Recombinant Proteins; D016212:Transforming Growth Factor beta