当前位置： SCI文献检索 > GENERAL AND COMPARATIVE ENDOCRINOLOGY期刊下所有文献 > Influence of insulin-like growth factors and insulin on the [35S]sulfate uptake by cartilage of the axolotl (Ambystoma mexicanum).

Influence of insulin-like growth factors and insulin on the [35S]sulfate uptake by cartilage of the axolotl (Ambystoma mexicanum).

Abstract：

:The actions of mammalian insulin-like growth factors (IGF-I and IGF-II) and insulin on skeletal growth of the axolotl, Ambystoma mexicanum, were examined by monitoring the in vitro uptake of [35S]sulfate by cartilage. Both growth factors stimulated sulfate uptake significantly at a concentration of 13 nM. The increase after incubation with 130 nM insulin was similar (uptake ca. 160% of control), but the effect was not significant. Further, the binding of 125I-IGF-I and 125I-IGF-II was studied in the skeletal tissue by quantitative in vitro autoradiography. Specific binding sites for both growth factors were localized in the perichondrial tissue. 125I-IGF-II binding sites were saturated at the used doses. Scatchard and Hill plots demonstrate heterogeneous binding sites exhibiting positive cooperativity. IGF-II was more effective than IGF-I in competitively displacing both labeled ligands. Insulin only slightly affected the binding at the highest concentrations. These results indicate that the insulinlike growth factors regulate skeletal growth in urodeles as in mammals.

journal_name

Gen Comp Endocrinol

journal_title

General and comparative endocrinology

authors

Schneider A,Hanke W

doi

10.1006/gcen.1996.0145

subject

Has Abstract

pub_date

1996-10-01 00:00:00

pages

92-102

issue

1

eissn

0016-6480

issn

1095-6840

pii

S0016-6480(96)90145-8

journal_volume

104

pub_type

杂志文章

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