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Molar mass487.36 g·mol−1
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SB-258585 is a drug which is used in scientific research. It acts as a potent, selective and orally active 5-HT6 receptor antagonist, with a Ki of 8.9nM.[1] It is used in its 125I radiolabelled form to map the distribution of 5-HT6 receptors in the brain.[2][3]

SB-258585 and other 5-HT6 antagonists show nootropic effects in animal studies,[4][5] as well as antidepressant and anxiolytic effects,[6] and have been proposed as potential novel treatments for cognitive disorders such as schizophrenia and Alzheimer's disease.


  1. ^ Hirst WD, Minton JA, Bromidge SM, Moss SF, Latter AJ, Riley G, et al. (August 2000). "Characterization of [(125)I]-SB-258585 binding to human recombinant and native 5-HT(6) receptors in rat, pig and human brain tissue". British Journal of Pharmacology. 130 (7): 1597–605. doi:10.1038/sj.bjp.0703458. PMC 1572217. PMID 10928963.
  2. ^ Roberts JC, Reavill C, East SZ, Harrison PJ, Patel S, Routledge C, Leslie RA (April 2002). "The distribution of 5-HT(6) receptors in rat brain: an autoradiographic binding study using the radiolabelled 5-HT(6) receptor antagonist [(125)I]SB-258585". Brain Research. 934 (1): 49–57. doi:10.1016/S0006-8993(02)02360-0. PMID 11937069.
  3. ^ East SZ, Burnet PW, Leslie RA, Roberts JC, Harrison PJ (September 2002). "5-HT6 receptor binding sites in schizophrenia and following antipsychotic drug administration: autoradiographic studies with [125I]SB-258585". Synapse. 45 (3): 191–9. doi:10.1002/syn.10097. PMID 12112397.
  4. ^ Stean TO, Hirst WD, Thomas DR, Price GW, Rogers D, Riley G, et al. (April 2002). "Pharmacological profile of SB-357134: a potent, selective, brain penetrant, and orally active 5-HT(6) receptor antagonist". Pharmacology, Biochemistry, and Behavior. 71 (4): 645–54. doi:10.1016/S0091-3057(01)00742-0. PMID 11888556.
  5. ^ Loiseau F, Dekeyne A, Millan MJ (January 2008). "Pro-cognitive effects of 5-HT6 receptor antagonists in the social recognition procedure in rats: implication of the frontal cortex". Psychopharmacology. 196 (1): 93–104. doi:10.1007/s00213-007-0934-5. PMID 17922111.
  6. ^ Wesołowska A, Nikiforuk A, Stachowicz K (September 2007). "Anxiolytic-like and antidepressant-like effects produced by the selective 5-HT6 receptor antagonist SB-258585 after intrahippocampal administration to rats". Behavioural Pharmacology. 18 (5–6): 439–46. doi:10.1097/FBP.0b013e3282d28f9c. PMID 17762512.