scholarly journals Inhibitory Effect of Juniperonic Acid (Δ-5c,11c,14c,17c-20:4, ω-3) on Bombesin-Induced Proliferation of Swiss 3T3 Cells

2008 ◽  
Vol 31 (9) ◽  
pp. 1786-1789 ◽  
Author(s):  
Jun-ichi Morishige ◽  
Naoki Amano ◽  
Kaoru Hirano ◽  
Hiroaki Nishio ◽  
Tamotsu Tanaka ◽  
...  
1983 ◽  
Vol 212 (2) ◽  
pp. 465-472 ◽  
Author(s):  
K D Brown ◽  
D M Blakeley

Pre-colostrum and colostrum from goats cause a marked inhibition of the binding of 125I-labelled epidermal growth factor (125I-EGF) to Swiss 3T3 cells. The ability of these secretions to inhibit 125I-EGF binding is closely correlated with the ability to stimulate DNA synthesis in quiescent 3T3 cell cultures, suggesting that goat mammary secretions may contain an EGF-related mitogen. However, the material in colostrum which inhibits 125I-EGF binding to Swiss 3T3 cells is a basic protein with Mr greater than 20000 and is thus quite different from mouse and human EGF. Furthermore, the colostral-mediated inhibition of 125I-EGF binding, although rapid and apparently competitive, differs from the inhibition of binding induced by native, unlabelled EGF. Thus, the inhibitory effect of colostrum is markedly decreased when the assay temperature is shifted from 37 degrees C to 4 degrees C whereas unlabelled EGF is an effective competitive inhibitor at both 37 degrees C and 4 degrees C. Incubation of cells with EGF causes a reduction in cell surface EGF receptors whereas exposure to colostrum does not induce down-regulation of the EGF receptor. Our results suggest that the colostral factor does not bind directly to EGF receptors but inhibits 125I-EGF binding by an indirect mechanism which involves a temperature-sensitive step.


1991 ◽  
Vol 266 (29) ◽  
pp. 19139-19141
Author(s):  
H. Arita ◽  
K. Hanasaki ◽  
T. Nakano ◽  
S. Oka ◽  
H. Teraoka ◽  
...  

FEBS Letters ◽  
1989 ◽  
Vol 244 (2) ◽  
pp. 469-472 ◽  
Author(s):  
Shizu Takeda ◽  
Hiromi Sugiyama ◽  
Shunji Natori ◽  
Kazuhisa Sekimizu

1989 ◽  
Vol 161 (2) ◽  
pp. 489-495 ◽  
Author(s):  
Ai Ohnishi ◽  
Ken Yamaguchi ◽  
Masatoshi Kusuhara ◽  
Kaoru Abe ◽  
Satoshi Kimura

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