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8 protocols using flupenthixol

1

Dissecting NE and DA Receptor Signaling

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The following drugs were intraperitoneally administered to dissect the relative contributions of NE and DA receptor signaling to behavior: nepicastat (100 mg/kg, DBH inhibitor) (Synosia Therapeutics, Basel, Switzerland); prazosin (0.5 mg/kg, α1AR antagonist) (Sigma-Aldrich, St. Louis, MO); propranolol (5 mg/kg, βAR antagonist) (Sigma-Aldrich); atipamezole (1 mg/kg, α2AR antagonist) (Sigma-Aldrich), flupenthixol (0.25 mg/kg, nonspecific DA receptor antagonist) (Sigma-Aldrich); SCH-23390 (0.03) mg/kg, D1 receptor antagonist) (Sigma-Aldrich); L-741,626 (10 mg/kg, D2 receptor antagonist) (Sigma-Aldrich). Doses selected were based on previous studies and pilot experiments to control for confounding effects such as motor impairment (Lustberg et al. 2020a (link), 2022 ; Mitchell et al., 2008 (link); Pina and Cunningham 2014 (link); Yan et al., 2016 (link)). Because the 0.03 mg/kg dose of SCH-23390 suppressed general motor activity, we also tested 0.01 and 0.006 mg/kg doses. All drugs were dissolved in bacteriostatic saline except prazosin and L-741,626. prazosin was first dissolved in 1.5 % DMSO and 1.5 % Cremophor EL before being added to saline, and L-741,626 was first dissolved in 10 % ethanol and 1.5 % Cremophor EL before being added to saline. The corresponding vehicle that each drug was dissolved in was used as a control.
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2

Fluorine-Containing Dopaminergic Agents Protocol

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The following fluorine‐containing dopaminergic agents were used: F‐DOPA (Advanced Biochemical Compounds, Radeberg, Germany), F‐tyrosine (SynQuest, Alachua, FL, USA), F‐L‐tyrosine (Tokyo Chemical Industry, Tokyo, Japan), haloperidol (a dopamine D2 receptor antagonist; Sigma, St. Louis, MO, USA), GBR13069 dihydrochloride (GBR13069 dihydrochloride; a dopamine transporter inhibitor; Tocris, Bristol, UK), GBR12909 dihydrochloride (GBR12909; a dopamine transporter inhibitor; Tocris), 3‐bis‐(4‐fluorophenyl) methoxytropane hydrochloride (3‐bis‐FPMT; a dopamine transporter inhibitor; Tocris), flupenthixol (a non‐selective dopamine receptor antagonist; Sigma), and fenfluramine (a serotonin releaser; Sigma).
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3

Mycobacterial Strain Characterization

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The M. tuberculosis strains used in this study were obtained from the culture collection maintained at the Mycobacteriology Laboratory (Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa) and comprised the M. tuberculosis H37Rv ATCC27294T, M. tuberculosis H37RvΔkatG [3 (link)] and seven drug-resistant clinical strains (Table 1). Mycobacterium bovis BCG Pasteur ATCC35734 expressing GFP (BCG-GFP) was kindly provided by Prof. M. Niederweis (University of Alabama at Birmingham, USA). Isoniazid, rifampicin, ofloxacin, amikacin, capreomycin, verapamil, flupenthixol, thioridazine, chlorpromazine, haloperidol, and the efflux substrate ethidium bromide were obtained from Sigma-Aldrich (St. Louis, MO, USA).
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4

Dopamine Receptor Antagonist Infusion in Striatum

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Cannulae for striatal infusions were obtained from Plastics One (Roanoke, VA). The D1/D2 dopamine receptor antagonist flupenthixol (Sigma) was infused bilaterally into the dorsal striatum at corrdinates AP = 1.5 mm, ML = ±1.5 mm DV = -2.5 at 15μg/0.5μL/hemisphere. The drug was prepared in aCSF (used as vehicle control) 5 minutes previous to the 1h-long oral intake tests.
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5

Comprehensive Pharmacological Library Acquisition

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Acepromazine (A7111), Amoxapine (A129), Clozapine (C6305), Flupenthixol (F114), Fluspirilene (F100), Haloperidol (H1512), Loxapine (L106), Molindone (M1818), Ondansetron (O3639), Pimozide (P1793), Reserpine (R0875), Spiperone (S7395), Triflupromazine (T2896), Prochlorperazine (P9178), Trifluoperazine (T8516), Thioridazine (T9025), TMZ (T2577), Chlorpromazine (C8138) and Fluphenazine (F4765) were purchased from Sigma. Perphenazine (125), Thiostrepton (522), Thioguanosine (347), Parthenolide (550) and Bepridil (368) were purchased from Prestwick. Promazine (46674) and Promethazine (46682) were purchased from Fluka.
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6

Quantifying Dopamine D1 Receptor Binding

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Autoradiography was performed as previously described to quantify dopamine type 1-like receptor (D1) binding [40 (link)–44 (link)]. Briefly, slides were pre-incubated for 60 min at room temperature in 50 mM Tris HCl buffer. Then, 2.5 nM of [3H] SCH 23390 (specific activity = 85 Ci/mmol) and 40 nM of ketanserin (both acquired from PerkinElmer, Waltham, MA, USA) were added to the re-incubation buffer, and the slides were incubated for an additional 60 min at room temperature. Non-specific binding was determined in the presence of 1 μM of flupenthixol (Sigma-Aldrich, St. Louis, MO, USA). Slides were washed 2× for 5 min in pre-incubation buffer, followed by a brief immersion in dH2O, all at 4 °C. This experiment was performed following a protocol adapted from [45 (link)].
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7

Flupenthixol Intraperitoneal Administration

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Flupenthixol (cis-(Z)-Flupenthixoldihydrochlorid, Sigma Aldrich) was dissolved in physiological saline (Braun, Melsungen Germany). Intraperitoneal injections were in a volume of 1 ml/kg 60 min. prior test onset.
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8

Pharmacological Dissection of Neuromodulator Contributions

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The following drugs were intraperitoneally administered to dissect the relative contributions of NE and DA receptor signaling to behavior: nepicastat (100 mg/kg, DBH inhibitor) (Synosia Therapeutics, Basel, Switzerland); prazosin (0.5 mg/kg, α1AR antagonist) (Sigma-Aldrich, St. Louis, MO); propranolol (5 mg/kg, βAR antagonist) (Sigma-Aldrich); atipamezole (1 mg/kg, α2AR antagonist) (Sigma-Aldrich), flupenthixol (0.25 mg/kg, nonspecific DA receptor antagonist) (Sigma-Aldrich); SCH-23390 (0.03) mg/kg, D1 receptor antagonist) (Sigma-Aldrich); L-741,626 (10 mg/kg, D2 receptor antagonist) (Sigma-Aldrich). Doses selected were based on previous studies and pilot experiments to control for confounding effects such as motor impairment (Lustberg et al 2020a (link), Lustberg et al 2022 (link), Mitchell et al 2008 (link), Pina & Cunningham 2014 (link), Yan et al 2016 (link)). Because the 0.03 mg/kg dose of SCH-23390 suppressed general motor activity, we also tested 0.01 and 0.006 mg/kg doses. All drugs were dissolved in bacteriostatic saline except prazosin and L-741,626. prazosin was first dissolved in 1.5% DMSO and 1.5% Cremophor EL before being added to saline, and L-741,626 was first dissolved in 10% ethanol and 1.5% Cremophor EL before being added to saline. The corresponding vehicle that each drug was dissolved in was used as a control.
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