L 741742 is an effective and highly selective antagonist of the D4 dopamine receptor (Ki: 1700, 770, and 3.5 nM at cloned human D2, D3, and D4 receptors).
TEI-9648, a Vitamin D3 Lactone analogue, is a potent and specific vitamin D receptor (VDR) antagonist. TEI-9648 inhibits VDR/VDRE-mediated genomic actions of 1α,25(OH)2D3. TEI-9648 also inhibits HL-60 cell differentiation induced by of 1α,25(OH)2D3. TEI-9648 has the potential for bone metabolism research[1][2]. TEI-9648 (10-1000 nM) dose-dependently blocks the reciprocal changes of CD11b and CD71 expression associated with HL-60 cell differentiation induced by 1α,25(OH)2D3[1]. TEI-9648 has consistently weaker suppressive effect than TEI-9647[1]. TEI-9648 can not induce cell differentiation even after treatment at 1 μM in HL-60 cell[1]. TEI-9648 alone can not induce activation of NBT-reducing activity or α-NB esterase activity. In contrast, TEI-9648 markedly suppresses the up-regulation induced by 1α,25(OH)2D3 (0.1 nM) in HL-60 cells[1]. [1]. Miura D, et al. Antagonistic action of novel 1α,25-dihydroxyvitamin D3-26, 23-lactone analogs on differentiation of human leukemia cells (HL-60) induced by 1α,25-dihydroxyvitamin D3. J Biol Chem. 1999 Jun 4;274(23):16392-9. [2]. Kazuya Takenouchi, et al. Synthesis and structure-activity relationships of TEI-9647 derivatives as Vitamin D3 antagonists. J Steroid Biochem Mol Biol. 2004 May;89-90(1-5):31-4.
Iloperidone metabolite P95 is a metabolite of the atypical antipsychotic iloperidone . It binds to the serotonin (5-HT) receptor subtype 5-HT2A and α1-, α2B-, and α2C-adrenergic receptors with mean Ki values of 7.08, 21.38, 83.18, and 47.86 nM, respectively, but does not cross the blood-brain barrier.
Mesdopetam (IRL790) is a dopamine D3receptor antagonist with a Ki of 90 nM and an IC50 of 9.8 μM for the human recombinant D3receptor. It exhibits psychomotor stabilizing properties and is utilized in the study of motor and psychiatric complications associated with Parkinson's disease.
Sarizotan (EMD 128130) is an orally active compound that acts as an agonist for serotonin 5-HT 1A receptors and dopamine receptors. It has shown potent activity with IC 50 values of 6.5 nM for rat 5-HT 1A , 0.1 nM for human 5-HT 1A , 15.1 nM for rat D 2 , 17 nM for human D 2 , 6.8 nM for human D 3 , and 2.4 nM for human D 4.2 .