2. Signaling Pathways
  3. Neuronal Signaling
  4. Sigma Receptor

Sigma Receptor

Sigma Receptor

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Sigma receptors (subtypes sigma-1 and sigma-2) are a unique class of binding sites expressed throughout the mammalian body. The endogenous ligand for these sites has not been identified, but steroid hormones (particularly progesterone), sphingolipid-derived amines and N,N-dimethyltryptamine can bind with fairly high affinity.

The sigma-1 receptor (σ1R) is an endoplasmic reticulum (ER)-resident chaperone protein that acts like an inter-organelle signaling modulator. It participates in many biological processes including nociception, cancer, stroke, memory, drug addiction, cardiac activity, and Alzheimer’s disease. The sigma-2 (σ2R) receptor is overexpressed in various human tumors. It has been validated as a biomarker for proliferating tumors.

Sigma Receptor Isoform Specific Products:

Sigma Receptor Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-125819
    Sigma-1 receptor antagonist 2
    		Antagonist 99.76%
    Sigma-1 receptor antagonist 2 is a potent and selective sigma 1 receptor (σ1 R) antagonist with Kis of 3.88 and 1288 nM for σ1 and σ2 receptor, respectively.
    Sigma-1 receptor antagonist 2
  • HY-153091
    BMY 14802
    		Antagonist 98.96%
    BMY 14802 is a sigma-1 receptor (σ1R) antagonist, as well as an agonist at serotonin (5-HT) 1A and adrenergic alpha-1 receptors. BMY 14802 inhibits abnormal involuntary movement (AIM) in rat Parkinson's disease (PD) model, with down-regulating the expression of AIM.
    BMY 14802
  • HY-116594A
    OPC-14523 hydrochloride
    		Inhibitor 99.95%
    OPC-14523 hydrochloride is an orally active sigma and 5-HT1A receptor agonist, with high affinity for sigma receptors (σ1/2 IC50=47/56 nM), the 5-HT1A receptor (IC50=2.3 nM), and the 5-HT transporter (IC50=80 nM). OPC-14523 hydrochloride shows antidepressant-like activity.
    OPC-14523 hydrochloride
  • HY-103412
    SKF 83959 hydrobromide
    		Modulator 99.86%
    SKF83959 hydrobromide is a potent and selective dopamine D1-like receptor partial agonist. SKF83959 hydrobromide Ki values for rat D1, D5, D2 and D3 receptors are 1.18, 7.56, 920 and 399 nM, respectively. SKF83959 hydrobromide is a potent allosteric modulator of sigma (σ)-1 receptor. SKF83959 hydrobromide belongs to benzazepine family and has improvements on cognitive dysfunction. SKF83959 hydrobromide can be used for the research of Alzheimer's disease and depression.
    SKF 83959 hydrobromide
  • HY-101626
    Sigma-LIGAND-1
    		99.67%
    Sigma-LIGAND-1 is a selective sigma receptor ligand with an IC50s of 16 nM, 19 nM at the DTG site and the PPP site, respectively. Sigma-LIGAND-1 has a Ki of 4000 nM at the dopamine D2 receptor.
    Sigma-LIGAND-1
  • HY-116463
    E1R
    		Agonist 99.83%
    E1R is a positive allosteric modulator of sigma-1 receptors (Sig1R PAM) with cognition-enhancing activity.
    E1R
  • HY-149804
    S1R agonist 2
    		Agonist ≥98.0%
    S1R agonist 2 (Compound 8b) is a selective S1R agonist with Kis of 1.1 nM and 88 nM for S1R and S2R, respectively. S1R agonist 2 exhibits neuroprotection against ROS and NMDA-induced neurotoxicity.
    S1R agonist 2
  • HY-124462
    Trifluperidol hydrochloride
    		Antagonist 99.4%
    Trifluperidol hydrochloride is a Sigma-1 receptor antagonist with a Ki value of 3.3 nM. Trifluperidol hydrochloride is used in the study of psychosis.
    Trifluperidol hydrochloride
  • HY-100155
    4-IBP
    		Agonist 98.90%
    4-IBP is a selective σ1 agonist with a high level of affinity for the σ1 receptor (Ki = 1.
    4-IBP
  • HY-149803
    S1R agonist 1
    		Agonist ≥98.0%
    S1R agonist 1 (Compound 6b) is a selective S1R agonist with Kis of 0.93 nM and 72 nM for S1R and S2R, respectively. S1R agonist 1 exhibits neuroprotection against ROS and NMDA-induced neurotoxicity.
    S1R agonist 1
  • HY-149803A
    S1R agonist 1 hydrochloride
    		Agonist 99.83%
    S1R agonist 1 (Compound 6b) hydrochloride is a selective S1R agonist with Kis of 0.93 nM and 72 nM for S1R and S2R, respectively. S1R agonist 1 hydrochloride exhibits neuroprotection against ROS and NMDA-induced neurotoxicity.
    S1R agonist 1 hydrochloride
  • HY-108512A
    PD 144418 oxalate
    		98.65%
    PD 144418 oxalate is a highly affinity, potent and selective sigma 1 (σ1) receptor ligand (Ki values of 0.08 nM and 1377 nM for σ1 and σ2 respectively). PD 144418 oxalate devoids of any significant affinity for other receptors, ion channels and enzymes. PD 144418 oxalate shows potential antipsychotic activity.
    PD 144418 oxalate
  • HY-19120
    KB-5492 anhydrous
    		Inhibitor 99.50%
    KB-5492 anhydrous is a potent and selective inhibitor of sigma receptor, inhibits specific [3H]1,3-di(2-tolyl)guanidine (DTG) binding to the sigma receptor with an IC50 of 3.15 μM. KB-5492 anhydrous is an anti-ulcer agent.
    KB-5492 anhydrous
  • HY-125820
    Sigma-1 receptor antagonist 3
    		Antagonist 99.47%
    Sigma-1 receptor antagonist 3 (compound135) is a potent and selective Sigma-1 (σ1) receptor antagonist with a Ki of 1.14 nM. Sigma-1 receptor antagonist 3 inhibits Human Ether-a-go-go-Related Gene (hERG) with an IC50 of 1.54 μM. Sigma-1 receptor antagonist 3 has the potential for the neuropathic pain.
    Sigma-1 receptor antagonist 3
  • HY-108515
    (+)-Igmesine hydrochloride
    		Agonist ≥99.0%
    (+)-Igmesine hydrochloride (JO1784) is an orally active and selective σ receptor ligand with neuroprotective and anti-amnesic activities.
    (+)-Igmesine hydrochloride
  • HY-116594
    OPC-14523 free base
    		Agonist
    OPC-14523 free base is an orally active sigma and 5-HT1A receptor agonist, with high affinity for sigma receptors (σ1/2 IC50=47/56 nM), the 5-HT1A receptor (IC50=2.3 nM), and the 5-HT transporter (IC50=80 nM). OPC-14523 free base shows antidepressant-like activity.
    OPC-14523 free base
  • HY-134189A
    EST73502 monohydrochloride
    		Antagonist 99.58%
    EST73502 monohydrochloride is a selective, orally active and blood-brain barrier (BBB) penetrant dual μ-opioid receptor (MOR) agonist and σ1 receptor (σ1R) antagonist, with Kis of 64 nM and 118 nM for MOR and σ1R, respectively. EST73502 monohydrochloride has antinociceptive activity.
    EST73502 monohydrochloride
  • HY-14813
    Cutamesine
    		Agonist
    Cutamesine (SA4503; AGY-94806) is a selective sigma 1 receptor(σ1R) agonist; high affinity for the sigma 1 receptor (IC50= 17.4±1.9 nM); 100-fold less affinity for the sigma 2 receptor.
    Cutamesine
  • HY-14221
    Siramesine
    		Agonist
    Siramesine (Lu 28-179) is a potent sigma-2 receptor agonist. Siramesine has a subnanomolar affinity for sigma-2 receptors (IC50=0.12 nM) and exhibits a 140-fold selectivity for sigma-2 receptors over sigma-1 receptors (IC50=17 nM). Siramesine triggers cell death through destabilisation of mitochondria, but not lysosomes. Anti-cancer activity.
    Siramesine
  • HY-13751A
    SR-31747 free base
    SR-31747 free base is a sigma ligand with immunosuppressive and anti-inflammatory properties. SR-31747 blocks cell proliferation by inhibiting sterol isomerase.
    SR-31747 free base
Sigma Receptor Isoform Comparison

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