Insulin-like growth factors in sheep thyroid cells: action, receptors and production.
Insulin-like growth factors in sheep thyroid cells: action, receptors and production.
复制标题
绵羊甲状腺细胞中的胰岛素样生长因子:作用、受体和产生。
DOI:
10.1016/0006-291x(88)90219-7
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发表时间:
1988
影响因子:
3.1
通讯作者:
Burrow,GN
中科院分区:
文献类型:
--
作者:
Bachrach,LK;Eggo,MC;Hintz,RL;Burrow,GN
Sheep thyroid cells cultured in serum-free medium were used to study the biologic activity, binding, and production of the insulin-like growth factors (IGFs). IGF-I, IGF-II, and insulin stimulated thyroid cell division. Abundant, specific IGF receptors on sheep thyroid cell membranes were identified by binding displacement studies. Maximal specific binding of [125I]-labeled IGF-I and IGF-II to 25 ug of membrane protein averaged 21% and 27% respectively. The presence of type I and type II IGF receptors was confirmed by polyacrylamide gel electrophoresis of [125I]IGFs covalently cross-linked to cell membranes. Under reducing conditions. [125I]IGF-I bound to a moiety of approximate Mr =135,000 and [125I]IGF-II to a moiety of approximate Mr=26,000. Cross-linking of [125I]IGF-I to medium conditioned by thyroid cells indicated the presence of four IGF binding proteins with apparent Mr=34,000, 26,000, 19,000 and 14,000. Thyroid cells also secreted IGF-I and II into the medium. IGF synthesis was enhanced consistently by recombinant growth hormone. These data indicate that sheep thyroid cells are a site for IGF action, binding, and production and provide further evidence that IGFs may modulate thyroid gland growth in an autocrine or paracrine manner.
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影响因子:
4.8
作者:
W. Valente;P. Vitti;L. Kohn;M. Brandi;C. Rotella;R. Toccafondi;D. Tramontano;S. Aloj;F. Ambesi
通讯作者:
F. Ambesi
影响因子:
3.5
作者:
P. Roger;P. Servais;J. Dumont
通讯作者:
J. Dumont
影响因子:
3.9
作者:
Guy Fayet;S. Hovsépian
通讯作者:
S. Hovsépian
DOI:
10.1016/0006-291x(87)90650-4
发表时间:
1987
影响因子:
3.1
作者:
Rosenfeld,RG;Conover,CA;Hodges,D;Lee,PD;Misra,P;Hintz,RL;Li,CH
通讯作者:
Li,CH
DOI:
10.1016/0006-291x(86)90280-9
发表时间:
1986
影响因子:
3.1
作者:
Rosenfeld,RG;Hodges,D;Pham,H;Lee,PD;Powell,DR
通讯作者:
Powell,DR