1. Membrane Transporter/Ion Channel Neuronal Signaling
  2. GABA Receptor

Lesogaberan (AZD-3355) napadisylate is a potent and selective GABAB receptor agonist with an EC50 of 8.

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Lesogaberan napadisylate Chemical Structure

Chemical Structure

CAS No. : 477956-38-0

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Based on 1 publication(s) in Google Scholar

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Lesogaberan (AZD-3355) napadisylate is a potent and selective GABAB receptor agonist with an EC50 of 8.6 nM for human recombinant GABAB receptors. The affinity (Kis) of Lesogaberan napadisylate for rat GABAB and GABAA receptors, as measured by displacement of [3H]GABA binding in brain membranes: 5.1 nM and 1.4 μM, respectively. Lesogaberan napadisylate inhibits transient lower esophageal sphincter relaxation through a peripheral mode of action[1]. IC50 & Target: Ki: 5.1±1.2 nM (rat GABAB), 1.4±0.3 μM (rat GABAA)[1]
EC50: 8.6±0.77 nM (human GABAB receptor)[1] In Vitro: Lesogaberan (3-30 nM) enhances human islet cell proliferation in vitro[2]. In Vivo: Lesogaberan (AZD3355) potently stimulates recombinant human GABAB receptors and inhibits transient lower esophageal sphincter relaxation (TLESR) in dogs, with a biphasic dose-response curve[1].
Oral Lesogaberan (0.08 mg/mL; 48 hours) protects human islet β-cells from apoptosis in islet grafts in mice[2].
Lesogaberan (7 μmol/kg) shows high oral availability (88% in the dog and 100% in the rat) and relatively low systemic clearance in female SpragueDawley rats[1].

In Vitro

Cell Proliferation Assay[2]

Cell Line: Human islet cells
Concentration: 3, 10, and 30 nM
Incubation Time: 4 days
Result: Had a small but nonsignificant promitotic effect at 3 nM, while treatment at higher dosages (10 and 30 nM) led to a 2-3-fold increase in proliferation relative to that of islets cultured in medium alone.
In Vivo
Animal Model: Diabetic NOD/scid mice were implanted with human islets[2]
Dosage: 0.08 mg/mL
Administration: Oral feeding; 48 hours
Result: Significantly reduced the percentages of apoptotic islet cells and increased the frequency of insulin+ β-cells in human islet grafts.
Animal Model: Female Sprague Dawley rats[1]
Dosage: 7 μmol/kg (Pharmacokinetic Analysis)
Administration: Oral
Result: High oral availability (88% in the dog and 100% in the rat) and relatively low systemic clearance. Plasma protein binding was 1% in rat and human plasma.
Clinical Trial
Molecular Weight







Room temperature in continental US; may vary elsewhere.

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    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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