The Effects of Retinoic Acid on the Insulin-like Growth Factor Axis in Primary Tissue Culture from Hyperparathyroidism

2006 ◽  
Vol 30 (5) ◽  
pp. 714-720 ◽  
Author(s):  
Chris K.M. Wong ◽  
Teresa Lai ◽  
Jeffrey M.P. Holly ◽  
Malcolm H. Wheeler ◽  
Claire E.H. Stewart ◽  
...  
Endocrinology ◽  
1992 ◽  
Vol 130 (6) ◽  
pp. 3669-3676 ◽  
Author(s):  
K Matsumoto ◽  
C Gaetano ◽  
W H Daughaday ◽  
C J Thiele

Hepatology ◽  
1999 ◽  
Vol 29 (4) ◽  
pp. 1091-1098 ◽  
Author(s):  
Dae-Ghon Kim ◽  
Dae-yeol Lee ◽  
Baik-Hwan Cho ◽  
Kyung-Ran You ◽  
Mi-Young Kim ◽  
...  

1978 ◽  
Vol 190 (2) ◽  
Author(s):  
Ubaldo Armato ◽  
GastoneG. Nussdorfer ◽  
Giuliano Neri ◽  
Enrica Draghi ◽  
PaolaG. Andreis ◽  
...  

1996 ◽  
Vol 134 (4) ◽  
pp. 474-480 ◽  
Author(s):  
Sylvie Babajko ◽  
Michel Binoux

Babajko S, Binoux M. Modulation by retinoic acid of insulin-like growth factor (IGF) and IGF binding protein expression in human SK-N-SH neuroblastoma cells. Eur J Endocrinol 1996;134:474–80. ISSN 0804–4643 Growth in neuroblastoma cells is regulated by insulin-like growth factors (IGFs) whose action is modulated by IGF binding proteins (IGFBPs). In this study, SK-N-SH neuroblastoma cells were shown to produce IGF-II, IGFBP-2, IGFBP-4 and small quantities of IGFBP-6. We have studied the effects of a natural morphogen, retinoic acid (RA), on growth and IGFBP expression in these cells. In all experiments, cells were cultured in serum-free medium and treated with 1 μmol/l RA for 12 h. Cell number increased by almost 50% during the first 24 h after the beginning of treatment. This stimulation was inhibited by 80% or more in the presence of the anti-type 1 IGF receptor antibody α-IR3 and anti-IGF-II antibody. The IGF-II concentrations in the culture media, measured after acidic gel filtration, increased about 1.5-fold and Northern blotting showed a concomitant increase in IGF-II mRNA levels. The mitogenic effect of RA therefore reflects its stimulation of IGF-II production. The availability of IGF-II to the cells may also be enhanced because of the proteolysis of IGFBP-2 to which it is bound. After this initial phase, proliferation ceased despite continued IGF-II production between 24 and 72 h. Both IGFBP-2 and IGFBP-4 production decreased, whereas that of IGFBP-6 increased. These changes appeared both in the protein quantities and in their mRNAs. Insulin-like growth factor binding protein 6 has a strong affinity for IGF-II, 5–10 times that of IGFBP-2 and at least 10 times that of the type 1 IGF receptor, and the arrested proliferation may result, at least in part, from sequestration by IGFBP-6 of the IGF-II secreted. Sylvie Babajko, INSERM U142, Hôpital Saint Antoine, 184 rue du Faubourg, St Antoine, 75571 Paris Cedex 12, France


1988 ◽  
Vol 72 (2) ◽  
pp. 116-126 ◽  
Author(s):  
D. Y. Jiang ◽  
P. S. Hiscott ◽  
I. Grierson ◽  
D. McLeod

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