GPCR/G Protein

(R)-(-)-α-Methylhistamine dihydrobromide is a potent and selective agonist of the H3 histamine receptor, exhibiting a Kd of 50.3 nM. This compound has been shown to enhance memory retention and alleviate memory impairment in rat models, making it a valuable tool for research on cognitive function and neuropharmacology. Its ability to penetrate the blood-brain barrier further establishes its utility in neurological studies.

HTMT dimaleate is a potent agonist of histamine H1 and H2 receptors. It exhibits significantly enhanced activity, being 40,000 times more effective than histamine in mediating H2 receptor effects in natural suppressor cells. This compound is valuable for research focused on immunological responses and histamine receptor signaling pathways.

BMY-25368 hydrochloride is a potent antagonist of the histamine H2 receptor, functioning primarily as a gastric acid secretion inhibitor. By competitively inhibiting gastric secretion stimulated by histamine, it also effectively antagonizes secretion induced by Pentagastrin, Bethanechol, and food intake. This reagent is applicable in research focused on understanding gastric physiology and the modulation of acid secretion.

Histamine dehydrogenase, Microorganism (EC 1.4.99) is a homodimeric enzyme that facilitates the oxidative deamination of histamine in conjunction with an electron carrier. This enzyme plays a crucial role in histamine metabolism and its regulation within biological systems. It is applicable in studies related to neurotransmission, immune response, and the mechanisms underlying allergic reactions. Researchers may utilize this enzyme to explore its potential roles in various physiological and pathological processes involving histamine.

Dimethindene is a selective histamine H1 receptor antagonist known for its ability to inhibit histamine-mediated processes. This compound has been shown to impair cutaneous wound healing through its antagonistic action. Additionally, Dimethindene is capable of blocking potassium (K+) currents, making it valuable for research applications focused on skin physiology and ion channel modulation.

Azelastine is a potent and selective antagonist of the histamine H1 receptor. It demonstrates significant antihistaminic activity, making it valuable for research into allergic rhinitis and asthma. Additionally, Azelastine has potential applications in studying diabetic hyperlipidemia and SARS-CoV-2-related pathophysiology.

Aminopotentidine is a potent antagonist of the histamine H2 receptor, exhibiting KB values of 220 nM for human H2 receptors and 280 nM for guinea pig H2 receptors. This compound is utilized in studying gastric acid secretion and has applications in gastrointestinal research. Additionally, it serves as a valuable precursor for the synthesis of [125I] iodo derivatives, facilitating radiolabeling studies.

(Rac)-Levomepromazine-d3 hydrochloride is a labeled form of the racemic compound Methotrimeprazine, belonging to the phenothiazine class. This reagent exhibits antagonist activity at various neurotransmitter receptor sites, including dopaminergic, cholinergic, serotonin, and histamine receptors. It is primarily used as a stable isotope for research applications, enabling in-depth studies of pharmacological interactions and the metabolic pathways of related compounds.

LML134 is a highly selective inverse agonist of the Histamine 3 receptor (H3R), demonstrating an impressive affinity with Ki values of 0.3 nM for hH3R cAMP and 12 nM for hH3R binding. This compound exhibits rapid brain penetration, resulting in significant H3R occupancy and a swift disengagement from its target. LML134 holds promise for investigating therapeutic strategies for sleep disorders by modulating histaminergic signaling pathways.

Brompheniramine is a selective histamine H1 receptor antagonist primarily utilized as an antihistamine agent. With a Kd of 6.06 nM, it effectively alleviates symptoms of allergic rhinitis. In addition to its antihistaminic properties, brompheniramine exhibits anticholinergic, antidepressant, and anesthetic effects, making it suitable for various research applications related to allergy and inflammation. The compound also interacts with hERG, calcium, and sodium channels, with IC50 values of 0.90 μM, 16.12 μM, and 21.26 μM, respectively.

Triprolidine hydrochloride is a potent histamine H1 antagonist that effectively alleviates symptoms associated with allergic conditions. It exhibits properties that provide spinal cord motor and sensory blockade, making it valuable for research applications in allergic rhinitis and other histamine-mediated disorders. This compound facilitates the study of antihistamine effects and their underlying mechanisms in various biological contexts.

ST-1006 is a potent agonist of the histamine H4 receptor, characterized by a pKi value of 7.94. This compound exhibits significant anti-inflammatory activity, making it a valuable tool for research into inflammatory processes and related diseases. Its potential applications include studies in immunology and the modulation of allergic responses, providing insights into therapeutic strategies targeting the H4 receptor pathway.

Oxomemazine is a phenothiazine-derived antagonist targeting the histamine H1 receptor. It exhibits notable antihistamine and anticholinergic properties, making it useful in research related to cough treatments. Additionally, Oxomemazine demonstrates a selective blockade of the muscarinic M1 receptor with a significant affinity difference compared to the M2 receptor. Studies have shown its protective effects against anaphylactic microshock in guinea pigs, highlighting its potential for further pharmacological investigation.

Cetirizine Impurity C dihydrochloride is an impurity of cetirizine, which acts as a selective H1 receptor antagonist. This compound demonstrates significant inhibition of histamine activity, contributing to its use in studies of allergic responses and histamine-mediated disorders. Its characterization is essential for ensuring the purity and efficacy of cetirizine in pharmaceutical formulations and research applications.

CB-64D is a dual agonist of sigma receptor 1 and sigma receptor 2, exhibiting Ki values of 16.5 nM and 3063 nM, respectively. It has been shown to induce apoptosis in SK-N-SH cancer cells, highlighting its potential role in cancer research. This compound can serve as a valuable tool for investigating the biological functions of sigma receptors and their implications in various pathologies.

Perphenazine-d6 fumarate is a deuterated derivative of Perphenazine, primarily acting as a dopamine D2 and D3 receptor antagonist with Ki values of 0.56 nM and 0.43 nM, respectively. Additionally, it demonstrates affinity for the 5-HT2A and Alpha-1A adrenergic receptors. This compound exhibits notable biological activities, including the inhibition of cancer cell proliferation and the induction of apoptosis. Perphenazine-d6 fumarate is useful in research addressing mental health disorders, cancer mechanisms, and inflammatory processes.

Perphenazine dihydrochloride is a potent antagonist of dopamine receptors, primarily targeting D2 and D3 subtypes, with Ki values of 0.56 nM and 0.43 nM, respectively. Additionally, it exhibits activity against 5-HT2A and α1A adrenergic receptors. This compound demonstrates significant biological activity by inhibiting cancer cell proliferation and inducing apoptosis. Perphenazine dihydrochloride is particularly useful in research focused on mental disorders, oncology, and inflammatory processes.

CB2R agonist 4 is a selective agonist for the cannabinoid receptor 2 (CB2R), exhibiting an EC50 value of 6.9 μM. This compound can induce cellular apoptosis, promote reactive oxygen species (ROS) production, and contribute to protein misfolding. Due to its cytotoxic effects observed in various tumor cell lines, CB2R agonist 4 is a valuable tool for cancer research applications.

D-Mannitol-d is a deuterium-labeled form of D-Mannitol, a polyol with significant applications in both food and pharmaceutical research. It functions primarily as an osmotic diuretic, utilized to alleviate tissue edema, while also promoting the absorption of calcium and magnesium through cecal fermentation. Additionally, D-Mannitol-d is instrumental in studies related to metabolic processes, including the induction of brown fat formation via β3-adrenergic receptor activation, potentially contributing to improved insulin sensitivity and reduced blood glucose levels. Its unique properties make it valuable for maintaining osmotic pressure in plant cell cultures, particularly when cellular integrity is compromised.

(R)-Verapamil is an enantiomer of the calcium channel blocker Verapamil, primarily acting on sodium channels with an IC50 of 3.19 μM. It exhibits agonistic activity on somatostatin receptor 2 (SSTR2), with an EC50 of 1.3 μM. In preclinical studies, (R)-Verapamil has demonstrated the ability to downregulate TXNIP protein expression and inhibit β-cell apoptosis in diabetic mouse models, contributing to effective blood glucose control. Additionally, it can be utilized as a PET tracer to assess P-glycoprotein function, making it a valuable tool in metabolic and pharmacological research.

SSB-2548 is a selective inhibitor of the chemokine receptor CXCR-4. It has demonstrated significant efficacy in inhibiting the proliferation and migration of acute myeloid leukemia cells, while also promoting apoptosis. Its favorable gastrointestinal absorption profile makes SSB-2548 a valuable tool for investigating the underlying mechanisms of leukemia and exploring potential therapeutic interventions.

Dabuzalgron hydrochloride is a selective agonist of the α-1A adrenergic receptor, primarily indicated for the management of urinary incontinence. This compound has demonstrated protective effects against Doxorubicin-induced cardiotoxicity by maintaining mitochondrial integrity and function. Its pharmacological properties make it a valuable tool in research focused on adrenergic signaling and cardiac health.

Olanzapine hydrochloride is a selective antagonist of serotonin receptors (5-HT2A/2C, 5-HT3) and dopamine receptors (D1, D2). It exhibits high affinity binding to various targets, including H1, muscarinic M1-5, and adrenergic α1 receptors, contributing to its pharmacological profile. This atypical antipsychotic is primarily used in research focusing on neuropharmacology, the treatment of schizophrenia, and mood disorders, providing valuable insights into the modulation of neurotransmitter systems.

2'-Hydroxyflavanone is a flavanone that functions as a platelet aggregation inhibitor. It demonstrates significant bioactivity by inhibiting platelet aggregation induced by arachidonic acid and adenosine diphosphate, with IC50 values of 47.8 μM and 147.2 μM, respectively. Additionally, 2'-hydroxyflavanone has been implicated in inhibiting cancer cell proliferation and inducing apoptosis, making it valuable for research in cancer and inflammatory pathways.

AB1 is a highly selective antagonist of the sphingosine-1-phosphate receptor 2 (S1P2) with an IC50 of 3.5 nM. It effectively inhibits S1P signaling pathways, leading to the suppression of tumor cell migration, angiogenesis, and the expression of the profibrotic mediator CTGF, while promoting apoptosis in cancer cells. This compound demonstrates significant potential for research focused on solid tumors and their microenvironment.