Expression of insulin-like growth factor receptor, IGF-1, and IGF-2 in primary and metastatic osteosarcoma

J Surg Oncol. 1998 Sep;69(1):21-7. doi: 10.1002/(sici)1096-9098(199809)69:1<21::aid-jso5>;2-m.


Background and objectives: We have previously shown that insulin-like growth factor (IGF)-responsive murine sarcomas demonstrate inhibition of local and metastatic disease growth when implanted in an IGF-deficient host animal. In this experiment, we tested whether IGF receptor (IGF-R) and ligands were expressed in human primary and metastatic osteosarcomas.

Methods: Fifty-two specimens of human osteosarcoma tumor from 48 patients were assayed for IGF-R, IGF-1, and IGF-2 using reverse transcriptase polymerase chain reaction.

Results: Twenty-one of 46 tumors analyzed had levels of expression of IGF-R greater than or equal to the positive control cell line. Twenty-seven of 44 expressed levels of IGF-1 greater than or equal to the positive control, as did 21 of 38 cases assayed for IGF-2. No differences were found between 40 primary tumor samples and 12 metastatic lesions in mean levels of IGF-R, IGF-1, or IGF-2. There was a moderately strong correlation between expression of IGF-R and IGF-1, suggesting that autocrine stimulation may be an important mechanism for stimulation of osteosarcoma proliferation.

Conclusions: A significant proportion of osteosarcoma tumors express IGF-R and ligands. Higher levels of expression were not correlated with metastatic lesions.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bone Neoplasms / metabolism*
  • Bone Neoplasms / pathology
  • Bone Neoplasms / secondary
  • Humans
  • Insulin-Like Growth Factor I / metabolism*
  • Insulin-Like Growth Factor II / metabolism*
  • Osteosarcoma / metabolism*
  • Osteosarcoma / pathology
  • Osteosarcoma / secondary
  • Polymerase Chain Reaction
  • Receptor, IGF Type 1 / metabolism*
  • Receptor, IGF Type 2 / metabolism*


  • Receptor, IGF Type 2
  • Insulin-Like Growth Factor I
  • Insulin-Like Growth Factor II
  • Receptor, IGF Type 1