CP-94, 253: a selective serotonin1B (5-HT1B) agonist that promotes satiety

Psychopharmacology (Berl). 1997 Jun;131(3):264-70. doi: 10.1007/s002130050292.


The selective 5-HT1B agonist CP-94,253 (3- (1,2,5,6-tetrahydro-4-pyridyl)-5-propoxypyrrolo[3, 2-b] pyridine) (5-40 mumol/kg) reduced the intake of both pellets and a 10% solution of sucrose (ID50 = 12.5 and 22.8 mumol/kg, respectively) in mildly deprived rats. Time-sampled observations revealed that CP-94,253 terminated feeding earlier, without disrupting the continuity of feeding. CP-94,253 increased standing but did not promote resting during satiation. Microstructural analysis of licking indicated that CP-94,253 decreased the frequency, but not the size, of bursts and clusters of licks without altering oral motor efficiency. The peripherally acting 5-HT1B agonist, CP-93,129 (3-(1,2,5,6-tetrahydropyrid-4-yl)pyrrolo[3,2-b]pyrid-5-one) had no effect on food intake. These results imply that CP-94,253 probes a role for central 5-HT1B receptors in the regulation of meal size and duration, but that recruitment of other 5-HT receptor subtypes may be needed for the full expression of satiety.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Behavior, Animal / drug effects
  • Eating / drug effects
  • Male
  • Pyridines / pharmacology*
  • Rats
  • Rats, Sprague-Dawley
  • Receptor, Serotonin, 5-HT1B
  • Receptors, Serotonin / drug effects*
  • Satiation / drug effects*
  • Serotonin Receptor Agonists / pharmacology*


  • CP 94253
  • Pyridines
  • Receptor, Serotonin, 5-HT1B
  • Receptors, Serotonin
  • Serotonin Receptor Agonists