Human chorionic gonadotropin (hCG) interacts directly with recombinant human TSH receptors

Yaron Tomer, Gerold K. Iiuber, Terry F. Davies

Research output: Contribution to journalArticlepeer-review

69 Scopus citations


We have previously shown that highly purified urinary hCG has the potential to both stimulate the intracellular accumulation of cyclic AMP and induce growth of immortalized rat thyroid cells. We have now compared the ability of recombinant human TSH and purified urinary hCG preparations to stimulate Chinese hamster ovary (CHO) cells which have been transfected with the human TSH receptor. Only transfected CHO cells expressing recombinant TSH receptors, but not control CHO cells, were stimulated by hCG to release cyclic AMP in a dose-related manner and the effect of 100 IU of HCG was equivalent to approximately 9.2 uU of rec-hTSH. These data demonstrate that hCG interacts directly with the human TSH receptor.

Original languageEnglish (US)
Pages (from-to)1477-1479
Number of pages3
JournalJournal of Clinical Endocrinology and Metabolism
Issue number6
StatePublished - Jun 1992
Externally publishedYes

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Biochemistry
  • Endocrinology
  • Clinical Biochemistry
  • Biochemistry, medical


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