Platelet serotonin uptake and 3H-imipramine binding in panic disorder

J Affect Disord. 1989 Jul-Aug;17(1):77-81. doi: 10.1016/0165-0327(89)90026-8.

Abstract

Platelet serotonin uptake and 3H-imipramine binding were measured in eight patients with panic disorders and nine controls. The Vmax of serotonin uptake was significantly elevated in patients compared to controls (77 +/- 14 vs. 50 +/- 4 pmol/10(8) platelets/min; P less than 0.05) while Km values were not different (1.46 +/- 0.41 vs. 1.24 +/- 0.20 microM). 3H-Imipramine binding to ruptured platelet membranes was not significantly different between patients and controls for either Bmax (395 +/- 71 vs. 412 +/- 107 fmol/mg protein) or Kd (0.90 +/- 0.18 vs. 1.09 +/- 0.30 nM). The implications for a serotonergic dysfunction in panic disorders are discussed.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Agoraphobia / blood*
  • Blood Platelets / metabolism*
  • Carrier Proteins*
  • Fear / physiology*
  • Female
  • Humans
  • Imipramine / pharmacokinetics*
  • Male
  • Panic / physiology*
  • Phobic Disorders / blood*
  • Receptors, Drug*
  • Receptors, Neurotransmitter / metabolism*
  • Serotonin / blood*

Substances

  • Carrier Proteins
  • Receptors, Drug
  • Receptors, Neurotransmitter
  • imipramine receptor
  • Serotonin
  • Imipramine