Department of Pathology Hershey Medical Center The Pennsylvania State University P.O. Box 850 Hershey PA 17033 USA.
Mediators Inflamm. 1995;4(6):413-6. doi: 10.1155/S0962935195000664.
We investigated the effect of transforming factor factor-beta(1) (TGF-beta(1)) on thromboxane B(2) (TXB(2)) and prostaglandin E(2) (PGE(2)) production in in vitro silica dust-exposed rat alveolar macrophages (AM). In the presence of 5 mug of anti-TGF-beta(1) antibodies, TXB(2) production decreased, but PGE(2) production increased. Addition of 2 ng of TGF-beta(1) to the culture medium potentiated TXB(2) production, but PGE(2) production apparently did not change. At 50 ng of TGF-beta(1), TXB(2) production decreased, and PGE(2) production varied. Our data suggest that in rat AM: (1) both endogenous and exogenous TGF-beta(1) regulate TXB(2) production; and (2) in the absence of endogenous TGF-beta(1) the liberation of PGE(2) increases; however, exogenous TGF-beta(1) does not have a regulatory effect on PGE(2).
我们研究了转化生长因子-β1(TGF-β1)对体外二氧化硅粉尘暴露的大鼠肺泡巨噬细胞(AM)中血栓素 B2(TXB2)和前列腺素 E2(PGE2)产生的影响。在存在 5 微克抗 TGF-β1 抗体的情况下,TXB2 的产生减少,但 PGE2 的产生增加。向培养基中添加 2 纳克 TGF-β1 可增强 TXB2 的产生,但 PGE2 的产生显然没有变化。在 50 纳克 TGF-β1 时,TXB2 的产生减少,PGE2 的产生也发生变化。我们的数据表明,在大鼠 AM 中:(1)内源性和外源性 TGF-β1 均可调节 TXB2 的产生;(2)在没有内源性 TGF-β1 的情况下,PGE2 的释放增加;然而,外源性 TGF-β1 对 PGE2 没有调节作用。