Phosphorylation of insulin-like growth factor binding protein-1 in patients with insulin-dependent diabetes mellitus and severe trauma.

Frost R., Bereket A. , Wilson T., Wojnar M., Lang C., Gelato M.

The Journal of clinical endocrinology and metabolism, cilt.78, ss.1533-5, 1994 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 78
  • Basım Tarihi: 1994
  • Doi Numarası: 10.1210/jcem.78.6.7515391
  • Dergi Adı: The Journal of clinical endocrinology and metabolism
  • Sayfa Sayıları: ss.1533-5


We have determined the lever of phosphorylated insulin-like growth factor binding protein-1 (pIGFBP-1)(1) In serum during two catabolic states: diabetes mellitus and trauma. Human sera were Incubated with [I-125]IGF-I for 2 h followed by non-denaturing PAGE. [I-125]IGF-I/IGFBP-1 complexes from serum co-migrated with a pure p(4)IGFBP-1 standard. Complex formation was specifically inhibited by unlabeled IGF-I. The migration of IGF-I/pIGFBP-1 complexes was retarded by IGFBP-1 antibodies, but not by antibodies against IGFBP-2 or IGFBP-3. Sera from three severely traumatized patients had up to 12-fdd more pIGFBP-1 than sera from age-matched controls. The level of pIGFBP-1 was reduced in all three patients upon hospital discharge. Sera from three patients with insulin dependent diabetes mellitus (IDDM) and severe ketoacidosis (DKA) had more pIGFBP-1 than controls. Administration of insulin to DKA patients lowered the level of pIGFBP-1. The present study shows that IGFBP-1 exists as a free, high affinity, phosphorylated form in vivo during two catabolic states.