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Carbenoxolone disodium salt

Manufactured by Merck Group
Sourced in United States

Carbenoxolone disodium salt is a laboratory reagent used in various research applications. It is a sodium salt derivative of carbenoxolone, which is a synthetic compound with potential pharmacological properties. The core function of this product is to serve as a research tool for investigating biological processes and molecular interactions in controlled laboratory settings.

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12 protocols using carbenoxolone disodium salt

1

Methylglyoxal Toxicity Assay Protocol

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Methylglyoxal (MG), propidium iodide, [3(4,5-dimethylthi-azol-2-yl)-2,5-diphenyl tetrazolium bromide] (MTT), neutral red, carbenoxolone disodium salt (CBX), aminoguanidine hemisulfate salt (AG), standard glutathione, o-phthaldialdehyde, metaphosphoric acid, L-glutamate, N-methyl-D-glucamine, 4-(2-hydroxyethyl) piperazine-L-ethanesulfonic acid (HEPES), and cell culture materials were purchased from Sigma (Saint Louis, MO, USA). Dulbecco's modified Eagle medium (DMEM) and Dulbecco's phosphate-buffered saline (DPBS) were purchased from Gibco BRL (Carlsbad, CA, USA). Fetal bovine serum was obtained from Cultilab (Campinas, SP, Brazil), and L-[2,3-3H] glutamate was purchased from Amersham International (United Kingdom). Polyclonal anti-EAAT1 (GLAST) and anti-EAAT2 (GLT-1) were purchased from Abcam (Cambridge, MA, USA), anti-EAAT3 was purchased from Novus Biologicals (Littleton, CO, USA), and polyclonal anti-glyoxalase 1 was purchased from Santa Cruz Biotechnology Inc. (Dallas, Texas, USA). All other chemicals were purchased from local commercial suppliers.
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2

Antagonists of P2 Purinergic Receptors

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P2 receptor antagonists: Pyridoxal phosphate-6-azo (benzene-2,4-disulfonic acid) tetrasodium salt hydrate (PPADS), MRS2211, MRS2179, MRS2159, A438079, Brilliant Blue G, ATP-2′, 3′-dialdehyde (OxATP), niflumix acid, carbenoxolone disodium salt, and apyrase were purchased from Sigma-Aldrich (St. Louis, MO, United States). NF449, NF023, and Evans Blue tetrasodium salt were purchased from Tocris Bioscience (Abingdon, United Kingdom). Suramin hexasodium salt was purchased from Aladdin (Shanghai, China). Anti-His monoclonal antibody was purchased from EARTHOX Life Sciences (Millbrae, CA, United States). Anti-ETX monoclonal antibody was developed previously by colleagues in our laboratory. HRP-coupled goat anti-mouse IgG antibody was purchased from TransGen Biotech (Beijing, China). The ATP assay kit was purchased from Calbiochem-Merck (Darmstadt, Germany). MTS (3-(4, 5-dimethylthiazol-2-yl) -5(3-carboxymethoxyphenyl) -2-(4-sulfopheny)-2H-tetrazolium, inner salt) was purchased from Promega Corporation (Madison, WI, United States).
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3

Cyclophosphamide Metabolism Modulation

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Cyclophosphamide (CYP) was purchased from LKT laboratories, Inc., (St. Paul, MN, USA). Corn oil, 18α-glycyrrhetinic acid (GA) and carbenoxolone disodium salt (CBX) were purchased from Sigma-Aldrich (St. Louis, MO, USA). Bay K8644 was purchased from Wako Pure Chemical Industries, Ltd. (Osaka, Japan).
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4

Pharmacological Modulation of Neurotransmission

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Carbachol (carbamylcholine chloride), kainate (kainic acid monohydrate), quinpirole, (+)- sulpiride, (+)-SKF-38393, PD168,077, carbenoxolone disodium salt, picrotoxin were purchased from Sigma (Sigma-Aldrich, Buchs, Switzerland); SYM2206 and L745.870 were from Tocris Bioscience (Bristol, UK); AP-5 (DL-2-amino-5-phosphopentanoic acid) was from Alexis Biochemicals (San Diego, CA); R(+)-SCH23390 HCl was from Research Biochemical International (Sigma-Aldrich, Buchs, Switzerland).
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5

HPLC Extraction of Glucocorticoids

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All HPLC grade solvents used in the extraction protocol and glucose-6-phosphate were obtained from Merck (Darmstadt, Germany). Ultrapure water was obtained using an Arium®-pro ultrapure system (Sartorius, Goettingen, Germany). Dimethyl sulfoxide (99.9%), cortisone, hydrocortisone, carbenoxolone disodium salt, and glucose 6-phosphate dehydrogenase were purchased from Sigma-Aldrich (St. Louis, MO, USA). Mixed gender pooled human liver microsomes were purchased from Sekisui XenoTech (Kansas, KS, USA). NADP+/H was obtained from Cayman Chemical (Ann Arbor, MI, USA).
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6

Carbenoxolone and Probenecid Stock Preparation

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Carbenoxolone disodium salt (≥98%; Sigma Aldrich) and water-soluble Probenecid (77 mg/ml; Invitrogen) were dissolved in Hanks’s Balanced Salt Solution (HBSS 1X, Life Technologies; calcium chloride, magnesium chloride, magnesium sulfate) to develop stock concentrations of each compound. Spironolactone was purchased from Selleckchem (#52-01-7).
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7

Assessing Carbenoxolone and Probenecid Effects

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Carbenoxolone disodium salt (≥98%; Sigma Aldrich) and water-soluble Probenecid (77 mg/mL; Thermo Fisher Scientific) were dissolved in Hanks’s Balanced Salt Solution (HBSS 1X, Gibco, Thermo Fisher Scientific); with calcium chloride, magnesium chloride, magnesium sulfate) to develop stock solutions of each compound. For in vitro assays, the blockers were added to culture medium only once, on day 0, whereas for chick-CAM assays, the blockers were applied once daily for 7 days. Final concentrations of 100 μM CBX or 1mM PBN were used for each assay.
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8

Carbenoxolone Inhibits 11β-HSD Enzymes

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Carbenoxolone disodium salt (Sigma C4790) was dissolved in 0.1M
sterile phosphate buffered saline. Experimental birds received a
~100mg/kg I.M. injection (see below), which inhibits 11ß-HSD1
and 11ß-HSD2-based activity and effects in rodents (Heine and Rowitch, 2009 (link); Jellinck et al., 1993 (link)).
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9

Pharmacological Modulation of Olfactory Bulb Oscillations

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Rats were initially anesthetized using isoflurane and implanted with a guide-electrode complex in the left and right OB. Following implantation, isoflurane was substituted for KX anesthesia (see above for further information). LFPs were recorded bilaterally and when a stable fast oscillation was visible (80–130 Hz). NBQX (2 μg, Sigma, n = 7), Bicuculline methiodide (0.05 μg, Sigma, n = 5) and Carbenoxolone disodium salt (1 μg, Sigma, n = 4) were infused into the bulb. Saline was infused to the opposite bulb. For infusion, internal cannulae (28 gauge, Bilaney) that extended 2 mm below the tip of the guides were inserted for 60 s followed by 60 s infusion of NBQX, bicuculline, CBX or saline (volume 0.5 μl). Rats were recorded for up to 30 min post infusion.
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10

Characterizing Apoptosis Pathway Inhibitors

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Carbenoxolone disodium salt was purchased from Sigma (St. Louis, MO, USA), and a 100 mmol/L stock solution was prepared in H2O. Probenecid was purchased from Sigma, and a 200 mmol/L stock solution was prepared in DMSO. The drugs used for the flow cytometry experiments were QVD-OPh (#OPH001, R&D Systems, Minneapolis, MN, USA, 10 mmol/L stock solution in DMSO), S63-845 (Chemietek, Indianapolis, IN, USA, 10 mmol/L stock solution in DMSO), and ABT737 (Selleckchem, Houston, TX, USA, 10 mmol/L stock solution in DMSO).
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