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42 protocols using 6 gingerol

1

Osteoblast-like MG63 Cell Culturing and 6-Gingerol Treatment

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Human osteoblast-like MG63 cells (ATCC CRL-1427) were obtained from American Type
Culture Collection (USA) and maintained in Dulbecco's modified Eagle's medium (DMEM;
Gibco BRL, USA) supplemented with 10% fetal bovine serum (FBS; Gibco BRL) and 100
µg/mL penicillin-streptomycin at 37°C in a humidified atmosphere containing 5%
CO2. Cells were seeded on six-well culture plates at an initial density
of 1×105 cells/mL and grown to approximately 80% confluence. For treatment
with 6-gingerol, MG-63 cells were pretreated with 1% FBS DMEM for 16 h, and then
treated with TNF-α (10 ng/mL) followed by exposure to 6-gingerol (Sigma, USA) with
serial concentrations (0-50 µM) in serum-free DMEM for 24 or 48 h. After the
6-gingerol treatment, the cells were washed with phosphate-buffered saline (PBS; 25
mM sodium phosphate, 150 mM NaCl, pH 7.2) and collected for the following
analyses.
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2

Ginger Compound Modulates Immune Responses

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6-Gingerol (Sigma-Aldrich, St Louis, MO) was dissolved to 3.5 μg/ml of 50% ethanol and diluted with drinking water, as required (the final ethanol concentration was less than 0.01%). The following antibodies were purchased from BD Pharmingen, San Diego, CA: phycoerythrin- (PE-) conjugated anti-Ly6G, fluorescein isothiocyanate- (FITC-) conjugated anti-CD11b, PE-conjugated anti-CXCR2, FITC-conjugated anti-CD4, FITC-conjugated anti-CD8, PE-conjugated anti-IFN-γ, PE-conjugated anti-CD4, PE-conjugated anti-CD8, and FITC-conjugated antiannexin V antibodies. P. aeruginosa (ATCC27853) was obtained from the American Type Culture Collection (ATCC). For the M1 and M2 macrophage analysis, cells were separately stained with monoclonal antibodies specific for F4/80-PE from eBioscience; F4/80-FITC and CD206-PerCP/Cy5.5 from BioLegend, San Diego, CA; and CD80-FITC and iNOS-FITC from BD Transduction Laboratories, San Diego, CA. Bacteria were grown in brain heart infusion (BHI) media (Difco) at 37°C for 18 h, and aliquots were frozen at −80°C.
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3

Streptozotocin-Induced Diabetic Model: Antioxidant and Anti-inflammatory Evaluation

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The diabetes inducing drug, Streptozotocin was purchased from Abcam (ab 142155, Cambridge, UK), 6-gingerol (G1045) was purchased Sigma Aldrich, St. Louis, MO, USA. Antioxidant enzymes like superoxide dismutase (SOD) (ab 65354), Glutathione-S-transferase (GST) (ab 65326), catalase (CAT) (ab 83464) and Trichrome Stain Kit (Connective Tissue Stain) (ab150686) were bought from Abcam, Cambridge, UK. ELISA kits for the assay of inflammation by C-reactive protein (ab 108827), TNF-α (ab 46070), IL-1β (ab 100768), and IL-6 (ab 100772) were procured from Abcam, Cambridge, UK. Primary antibodies (TNF-α) and Goat Anti-Mouse IgG H&L (HRP) (abcam, Cambridge, UK) used in this study were purchased from Abcam, Cambridge, UK. All supplementary chemicals used in this study were of high purity grade obtained from commercial sources.
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4

Fingerprinting of Endocannabinoid System

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Fingerprinting eCS was performed as described elsewhere [20 (link)], with the mobile phase composed of 0.1% formic acid (A) and acetonitrile (B) in water. The conditions of solvent gradient elution were 20% B in 0–3 min, 20% B in 5 min, 30% B in 12 min, 35% B in 16 min, 60% B in 20 min, 80% B in 30 min, 80% B in 34 min, 60% B in 37 min, 20% B in 40 min. Fifteen μL of eCS was run at the flow rate of 0.5 mL/min and 37 °C. All the chemicals were detected at wavelengths of 254 ~ 360 nm. The retention time of each chemical was compared to those of standard chemicals for identification. Chemical standards, such as chlorogenic acid, rosmarinic acid, Eugenol, 6-Gingerol, and aristolochic acid I, were obtained from Sigma-Aldrich (Seoul, Korea).
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5

DPPH-Based Antioxidant Activity Evaluation

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Antioxidant activity of the extracts were estimated using DPPH in vitro method Mensor et al. [18] (link). Test samples were dissolved separately in methanol to get test solution of 1 mg/mL. Series of extract/ pure components (6-gingerol and 6-shogaol; purchased from (Sigma-Aldrich GmbH, Germany) solutions of different concentrations (100, 200, 400, 600, 800 and 1000 µg/mL) were prepared by diluting with methanol. Assays were performed in 96-well, microtiter plates. 140 µL of 0.6 × 10−6 mol/L DPPH were added to each well containing 70 µL of sample. The mixture was shaken gently and left to stand for 30 min in dark at room temperature. The absorbance was measured spectrophotometrically at 517 nm using Cecil-Elect Spectrophotometer. Blank was done in the same way using methanol and sample without DPPH and control was done in the same way but using DPPH and methanol without sample. Ascorbic acid was used as reference antioxidant compound. Every analyse is done in triplicate. The ability to scavenge DPPH radical was calculated by the following equation: DPPH radical scavenging activity(%)=100-[(Abssample-Absblank)×100]/(Abscontrol)] where

Abssample is the absorbance of DPPH radical + sample;

Absblank is the absorbance of sample + methanol;

Abscontrol is the absorbance of DPPH radical + methanol.

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6

Vascular Reactivity Assessment Protocol

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6-Gingerol, Nω-nitro-l-arginine methyl ester hydrochloride (l-NAME), methylene blue (MB), tetraethylammonium chloride (TEA), indomethacin (INDO), aminoguanidine (AG), ribose, bovine serum albumin (BSA), acetylcholine (ACh), and phenylephrine (PE) were purchased from Sigma-Aldrich Co., St Louis, MO, USA, and 4-amino-5-methylamino-2′,7′-difluorofluorescein (DAF-FM) diacetate was purchased from Molecular Probes, NY, USA. All chemicals were dissolved in ultrapure deionized water except for 6-Gingerol, DAF-FM diacetate, and INDO, which were dissolved in dimethyl sulfoxide (DMSO). The final DMSO concentration did not exceed 0.1% that has no effect on vascular reactivity according to our preliminary studies.
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7

Apoptosis Induction in Meningioma Cells

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Human meningioma cell lines (IOMM-Lee, CH157MN) were obtained from Elmar Kirchesa (Institute of Neuropathology, Otto-von-Guericke-University, Germany) and Jerry Jeff Jaboin (Washington University of Medicine, USA) [22 (link)–25 (link)]. Human neuron culture was purchased from ScienceCell Research Laboratories and maintained under the conditions provided by ScienceCell Research Laboratories. Standard laboratory techniques were used to grow and treat these cells. Drug stock solutions were prepared in dimethyl sulfoxide (DMSO). An equal amount of DMSO (0.01 %) was added to untreated control cells. Dose-response studies were conducted to determine the suitable concentration of the drugs used in the experiments [26 (link), 27 (link)]. Cells were treated with 25 μM Limonin (LKT Laboratories), 25 μM Tangeritin (LKT Laboratories), 25 μM 6-Gingerol (Sigma-Aldrich), 25 μM Zerumbone (LKT Laboratories), 25 μM Ganoderic Acid A (ChromaDex), 25 μM Ganoderic Acid DM (ChemFaces), and 25 μM hydroxyurea (Sigma) for 24 h for induction of apoptosis. After treatments, cells were used for determination of the mechanisms of apoptosis.
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8

Preparation of 6-Gingerol Stock Solution

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6-gingerol was obtained from Sigma-Aldrich (St. Louis, MO, USA. catalog # G1046). It was dissolved in DMSO in a stock of 100 mmol/L and was diluted in cell culture media for experimental uses.
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9

Fluorescent Lipophilic Dyes and Immune Cell Markers

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The fluorescent lipophilic dyes, 1,1′-dioctadecyl-3,3,3′,3′-tetramethylindocarbocyanine perchlorate (DiL), 3,3′-dioctadecyloxacarbocyanine perchlorate (DiO) and 1,1′-dioctadecyl-3,3′,3′-tetramethylindotricarbocyanine iodide (DiR), were purchased from Promokine (Heidelberg, Germany); DC-Chol/DOPE Blend was from Avanti Polar Lipids (Alabaster, AL, USA); phalloidin-FITC, O-dianisidine dihydrochloride, myeloperoxidase from human leukocytes, type VIII collagenase, DNase I, (6)-gingerol and (6)-shogaol standards were purchased from Sigma (St. Louis, MO, USA). Rabbit anti-mouse E-cadherin antibody was from Santa Cruz Biotechnology (Santa Cruz, CA, USA). Anti-mouse CD326 (EpCAM) PE-Cy7, anti-mouse CD11b eFluo 450; anti-mouse CD11c APC, and anti-mouse F4/80 antigen PE-Cy7 were purchased from eBioscience (San Diego, CA, USA). Duoset enzyme-linked immunosorbent assay (ELISA) kits were purchased from R&D Systems (Minneapolis, MN, USA).
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10

Comprehensive Phytochemical Protocol Inventory

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Indigo, Aliso B acetate, gentiopicroside, peimine, perillaldehyde, wedelolactone, bergapten, picroside I, berberine, cinnamaldehyde, ephedrine, p-synephrine, 6-shogao, and 6-gingerol were purchased from Sigma-Aldrich. Phellodendrine was purchased from Abcam. Baicalein, baicalin, wogonin, wogonoside, and Ephedra sinica were kindly provided by Y.L. Leu (Chang Gung University, Taiwan). Scutellaria baicalensis (precursor of Baicalein, baicalin, wogonin, wogonoside) and Ephedra sinica were supplied and authenticated by Department of Pharmacy Services, Chang Gung Memorial Hospital at Taoyuan, Taiwan. See Supplementary Information for more details on compound preparation.
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