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26 protocols using indole 3 carbinol

1

Modulation of GPR15 Expression by AhR Ligands

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A suspension of Indole-3-carbinol (I3C; Sigma-Aldrich, St. Louis, MI) was prepared in corn oil (100 mg/mL). AHR wildtype, Gpr15gfp/,+ mice were orally gavaged with 600 mg/kg (≈150 μL per 20 g mouse) once daily, five times a week for 3 weeks. In separate studies, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD; purchased from AccuStandard, New Haven, CT) was dissolved in DMSO to a stock concentration of 5 μg/mL. Gpr15gfp/,+ mice were i.p. injected with 1 μg/kg or 10 μg/kg (or 40 μL per 20 g mouse) three times a week (every other day) for 3 weeks. Expression of GPR15 on tissue lymphocytes was assessed by flow cytometry. In separate experiments, GPR15-sufficient Ahr+/+ (CD45.1) and Ahr−/− (CD45.2) treated with DMSO or 10 μg/kg of TCDD and expression of GPR15 on tissue lymphocytes was analyzed using GPR15-PE antibody (Biolegend).
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2

Dosing of AhR Ligands in Mice

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2,3,7,8,Tetrachlorodibenzo-p-dioxin (dioxin, TCDD) was obtained from Cambridge Isotopes (Cambridge, MA). A 1 mg/mL stock solution of TCDD in anisole/peanut oil was diluted to yield treatment solutions containing 1 or 10 μg/ mL in peanut oil. 2-(1H-Indol-3-ylcarbonyl)-4-thiazolecar- boxylic acid methyl ester (ITE) was obtained from Tocris (Bio-techne brand, Minneapolis, MN). A 20 mg/mL stock solution of ITE in DMSO was diluted to yield a treatment solution containing 0.8 mg/mL in peanut oil. Indole 3-car- binol (I3C), obtained from Sigma-Aldrich (St. Louis, MO), was suspended in peanut oil (10 mg/mL). The estimated half-life of TCDD is approximately 10 days in mice (Birn-baum 1986 (link); Gasiewicz et al. 1983 (link)), whereas the in vivo absorption, metabolism, distribution, and excretion rates of ITE and I3C in mice remain largely undetermined. There fore, the selected doses and routes of exposure for these AhR ligands were based upon previous reports, thus integrating our results with previous findings in other model systems (Abron et al. 2018 (link); Benson and Shepherd 2011a (link); Boule et al. 2018b (link); Nugent et al. 2013 (link); Quintana et al. 2010b (link); Singh et al. 2016 (link)).
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3

Neuroprotective Effects of PTEN Inhibition

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Nicotine, methyllycaconitine (MLA), a selective α7 nAChR blocker (Gowayed et al., 2019 (link); Papke and Horenstein, 2021 (link)), and a potent PTEN protector (Lee et al., 2019 (link)), indole-3-carbinol (I3C), were purchased from Sigma-Aldrich. The inhibitor of PTEN, SF1670, was purchased from Selleckchem. SF1670 and I3C were dissolved in dimethylsulfoxide (DMSO) first and diluted in saline solution, while nicotine and MLA were dissolved in saline solution directly. Rats had already received intraperitoneal injections of nicotine at 1 mg/kg and MLA at 1 mg/kg once daily for 1 week before surgery and continued receiving intraperitoneal injections of 1 mg/kg nicotine or MLA in sterile saline once daily for 3 week (Teng et al., 2019 (link)), whereas matched control rats received an equal volume of intraperitoneal saline. SF1670 (0.3 mg/kg; Li et al., 2011 (link)) and I3C (2 mg/kg; Lee et al., 2019 (link)) were injected intraperitoneally in nicotine-treated rats simultaneously until the date of surgery to observe the nociceptive effect of PTEN deficiency and analgesic effects for the prevention of PTEN degradation, respectively.
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4

Comprehensive Biochemical Protocol Compendium

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DMBA (7, 12- dimethylbenz(α)anthracene), Indole 3 carbinol (I3C), 5-5′dithiobisnitrobenzoic acid (DTNB) sodium dithionate and malondialdehyde were obtained from Sigma-aldrich, Banglore, India. Xylenol orange, ammonium ferrous sulfate, cyclohexane, 2,6-dichlorophenol-indophenol (DCPIP), reduced nicotinamide adenine dinucleotide (NADH), reduced nicotinamide adenine dinucleotide phosphate (NADPH), bovine serum albumin (BSA), potassium ferricyanide, 1-chloro-2,4-dinitrobenzene (CDNB), glycylglycine, reduced glutathione (GSH), oxidized glutathione (GSSG), ascorbic acid, guiacol, triton X, nitroblue tetrazolium chloride (NBT), hydroxylamine hydrochloride, pyruvate were obtained from Himedia Laboratories, Mumbai, India. All other reagents used in the present study were of analytical grade.
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5

I3C Solubility and Dosing

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Indole-3-carbinol (I3C) was obtained from Sigma-Aldrich (Product Number: 17256, CAS-No.: 700-06-1). For in vitro assays, I3C was dissolved in 100% DMSO and added to the cell culture medium at different concentrations. For in vivo assay, the corresponding dose of I3C suspension is prepared using 10% DMSO, and the solvent was 0.9% sodium chloride solution.
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6

Culturing HepG2 Liver Cancer Cells

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The human liver cancer HepG2 cells were purchased from the Cell Bank of Type Culture Collection of the Chinese Academy of Sciences (Beijing, China) and cultured in DMEM (C11995500BT, Gibco, Waltham, MA, USA) containing 10% fetal bovine serum (FBS, 04-001-1A, BI, Herzliya, Israel) and 1% penicillin and streptomycin (P1400, Solarbio, Beijing, China) under 37 °C and humidified 5% CO2. Indole-3-carbinol (I3C), dissolved in dimethyl sulfoxide (DMSO, D5879, Sigma-Aldrich, St. Louis, MO, USA) was purchased from Sigma-Aldrich (I7256, St. Louis, MO, USA). Pifithrin-α (PFT-α, S1816) was purchased from Beyotime Biotechnology (Shanghai, China).
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7

Analytical Protocols for Botanical Extracts

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Imidazol formate, formic acid, acetonitrile, sulfatase, 2-propanol, 2,2-azinobis-(ethyl-2,3-dihydrobenzothiazoline-6-sulphonic acid) diammonium salt (ABTS), 1,2-benzenedithiol, 3,3′-diindolylmethane (DIM), and indole-3-carbinol (I3C) were obtained from Sigma-Aldrich (Darmstadt, Germany). Glucotropaeolin (GTL) was from AppliChem (Darmstadt, Germany), indole-3-acetonitrile (I3ACN) from Merck (Darmstadt, Germany), and HPLC grade methanol from Chempur (Piekary Śląskie, Poland). Water was purified with a QPLUS185 system from Millipore (Burlington, MA, USA).
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8

Evaluating Dioxin Receptor Modulators

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TCDD (2,3,7,8-tetrachlorodibenzo-p-dioxine), skatole (3-methylindole), indole-3-carbinol (I3C), 1-aminobenzotriazole (ABT) and actinomycin D were from Sigma-Aldrich (Saint-Louis, MO, US). CH-223191 (2-Methyl-2H-pyrazole-3-carboxylic acid-(2-methyl-4-o-tolyl-azophenyl)-amide, an antagonist of TCDD-mediated AhR activation [24 (link), 25 (link)], was from Calbiochem (Merck KGaA, Damstadt, Germany).
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9

Dissolution and Storage of I3C, DIM, and 5-FU

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Indole-3-carbinol (I3C), 3,3-diindolylmethane (DIM), and 5-Fluorouracil (5-FU) were all acquired from Sigma-Aldrich (Saint Louis, Mo, USA); they were dissolved in a mixture of dimethylsulfoxide (DMSO) and corn oil and stored at 4°C in the dark. Immediately before use, I3C, DIM, and 5-FU were dissolved in physiological saline to the required nal concentration used for treatment.
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10

Phytochemical Screening and Antioxidant Evaluation

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The following chemicals were used: methanol, acetonitrile, isopropanol (HPLC grade, Merck, Darmstadt, Germany), formic acid (>96.0%), 2,2-azinobis-(ethyl-2,3-dihydrobenzothiazoline-6-sulphonic acid) diammonium salt-ABTS, 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid-Trolox, caffeic acid, ferulic acid, sinapic acid, quercetin, kaempferol, indole-3-carbinol, indole-3-acetonitrile, 3,3′-diindolylmethane, N-acetyl-l-cysteine, allyl isothiocyanate, sulforaphane (Sigma Aldrich, St. Louis, MO, USA), and glucotropaeolin (AppliChem, Darmstadt, Germany).
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