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10 protocols using butoxamine

1

Preparation of Compound Stock Solutions

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100 mM stock solutions of all screened compounds were prepared in individual, sterile amber vials. All stock solutions were dissolved in sterile DMSO, except L-arginine, which was solubilized using dH2O, due to solubility constraints. Sterile cell-culture grade DMSO, tamsulosin hydrochloride, nifedipine, isoproterenol, butoxamine, adenosine and L-arginine were obtained from Sigma Aldrich. PGE1, PGE2, rolipram, L-arginine, ondansetron, celecoxib, diclofenac, mirabegron, sildenafil, atropine, vardenafil and tiotropium were obtained from Cayman Chemical. Y-27632 dihydrochloride was obtained from R&D Systems. Stock solutions when unused were stored at −20 °C
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2

Pharmacological Modulation of α7nAChR in Mice

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Male mice (8–12 weeks of age, 20–25 g) were used for all experiments. Wild-type C57Bl/6 mice were purchased from the National Cancer Institute (Frederick, MD), α7nAChR−/− mice (B6.129S7-Chrna7tm1Bay/J) were obtained from Jackson Laboratories (Bar Harbor, ME), and WT (α7nAChR+/+) progeny were used as controls in Figures 1 and 2. Rag1−/− mice (B6.129S7-Rag1tm1Mom/J) were obtained from Jackson Laboratories. Butoxamine (β2-adrenergic receptor antagonist), salbutamol (β2-adrenergic receptor agonist), nicotine (nicotinic acetylcholine receptor agonist), and LPS (from Escherichia coli O111:B4) were purchased from Sigma-Aldrich (St. Louis, MO).
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3

Pharmacological Effects of Adrenergic Agents

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Dobutamine (selective β-adrenergic receptor agonist; cardiotonic agent), terbutaline (selective β2-adrenergic receptor agonist; used as a fast-acting bronchodilator or short-term asthma treatment), metoprolol (selective β1-adrenergic receptor antagonist; treat high-blood pressure, chest pain due to poor blood flow to the heart) and butoxamine (selective β2-adrenergic receptor antagonist; not clinically) were purchased from Sigma Co. (St. Louis, MO, USA). Pertussis toxin (PTX; a protein-based AB5-type exotoxin) was purchased from Tocris Co. (Minneapolis, MN, USA). Hexamethonium (non-depolarising ganglionic blocker) was purchased from Santa Cruz (Ave. Delaware, CA, USA). Dobutamine, terbutaline, metoprolol, butoxamine, hexamethonium and PTX were dissolved in saline. All drugs were prepared just before use. A blood glucose meter, a lancing device and strips were purchased from Roche Diagnostics (Sandhofer Strasse, Mannheim, Germany). The mouse insulin ELISA kit was purchased from Shibayagi Co. (Shibukawa, Japan).
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4

Intrathecal and Intraperitoneal Drug Administrations

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PDTC, Phentolamine, Propranolol, atenolol, SR5923A, butoxamine and NE were purchased from Sigma-Aldrich and freshly prepared in 0.9% saline. PDTC was injected intrathecally for consecutive 7 days with one injection per day and other drugs were injected intraperitoneally; the routes of drug administration and doses used in this study are based on prior reports45 (link),49 (link).
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5

Molecular Expression and Behavioral Effects of Neuroactive Compounds

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O-(Carboxymethyl) hydroxylamine hemihydrochloride (AOAA, an inhibitor of CBS), propranolol (Prop, an antagonist of β adrenergic receptor), phentolamine (Phen, an antagonist of α adrenergic receptor), atenolol, SR 59230 A and butoxamine, norepinephrine (NE) and capsaicin (CAP) were purchased from Sigma-Aldrich and were freshly prepared in 0.9% normal saline. AOAA or NE was intraperitoneally injected once daily for consecutive 7 days for molecular expression experiments and for behavioral test.
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6

Noradrenaline and Butoxamine Effects on Human Hair Follicles

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Noradrenaline (Sigma-Aldrich, 489350) stock solution was prepared freshly by dissolving in a sterile aqueous solution containing 0.1% ascorbic acid and 0.9% NaCl to a final concentration of 10 mM. Butoxamine (Sigma-Aldrich, B1385) was dissolved in ultrapure water to a final concentration of 10 mM as a stock solution. Isolated human hair follicles were incubated with William’s E medium containing 0.1 mM Noradrenaline or 0.1 mM Butoxamine.
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7

Antagonizing β₂-ADR in VEGF-secreting cells

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Mycoplasma free keratinocyte derived VEGF secreting A-431 cells14 (link) (Cat#CRL-1555, ATCC, MD, USA)
was authenticated using short tandem repeat profiling and cultured in
Dulbecco’s Modified Eagle’s Medium (Cat#30–2002, ATCC)
supplemented with 10% FBS (Cat#30–2020, ATCC). The cells were then serum
and growth factor starved for 12 h and treated with selective β₂
ADR antagonists butoxamine (Cat#B1385, Sigma) or ICI-118,551 (ICI) (Cat#0821,
Tocris, MN, USA). Forskolin was procured from Sigma, MO, USA.
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8

Norepinephrine Modulates Pancreatic Cancer Cell Proliferation

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The IncuCyte S3 live-cell analysis system (Sartorius, Göttingen, Germany) was used for kinetic monitoring of cell proliferation of pancreatic cancer cells. PK4A-Luc and R211-Luc cells were seeded at 104/well in 24-well plates in the presence of increasing concentrations of norepinephrine (cat. #A9512; Sigma-Aldrich) (10−6–10−8 M) with or without the adrenergic receptor inhibitors atenolol (10−6  M; cat. # A7655; Sigma-Aldrich) or butoxamine (10−6  M; cat. # B1385; Sigma-Aldrich). Phase-contrast images were acquired every hour for 96 h and cell proliferation was monitored by analyzing the occupied area (% confluence) of cell images over time.
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9

Macrophage Cytokine Response to Norepinephrine

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Islet macrophages were cultured immediately following isolation at 5000 cells per well in 24-well plates. Cells were cultured in presence of norepinephrine (1 × 10−6 or 1 × 10−8 M; Sigma-Aldrich) for 4 hours before being harvested for further analysis of cytokines or mRNA (Norgen Biotek RNA isolation kit). Antagonists prazosin (Sigma-Aldrich) and butoxamine (Sigma-Aldrich) were added at concentration of 1 × 10−8 M.
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10

Investigating β2 Adrenergic Receptor Function

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For the purpose of investigating β2 adrenergic receptor function, the antagonist butoxamine or the agonist clenbuterol (Sigma-Aldrich) were administered via i.p. injection (5 mg/kg). For acute treatments, injections were performed 2 h prior to imaging. For chronic treatments, injections were performed for 5 consecutive days and imaging was performed 24 h after the last injection.
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