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5 protocols using n acetyl aspartic acid d3

1

Comprehensive Metabolite Analysis by HPLC-MS

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High-performance liquid chromatography (HPLC)-grade ammonium acetate from Sigma, acetonitrile, methanol, chloroform, and water were procured from Burdick & Jackson (Morristown, NJ). Mass spectrometry-grade formic acid was purchased from Sigma-Aldrich (St Louis, MO).) Metabolite standards and internal standards, including N-acetyl Aspartic acid-d3, tryptophan-15N2, sarcosine-d3, glutamic acid-d5, thymine-d4, gibberellic acid, trans-zeatin, jasmonic acid, 15N anthranilic acid, and Testosterone-d3, were purchased from Sigma-Aldrich (St. Louis, MO).
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2

Metabolite Extraction and Quantification

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HPLC grade ammonium acetate, acetonitrile, methanol, chloroform, ethanol, hexane, and water were procured from Burdick & Jackson (Morristown, NJ). MS grade formic acid, standard compounds and isotope labeled standards, including N-acetyl aspartic acid-d3, tryptophan-15N2, sarcosine-d3, glutamic acid-d5, thymine-d4, gibberellic acid, trans-zeatin, jasmonic acid, 15N anthranilic acid, and testosterone-d3, were purchased from Sigma-Aldrich (St. Louis, MO).
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3

Comprehensive Metabolomics Analytical Protocol

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Sources for reagents were: HPLC-grade acetonitrile and water (Burdick & Jackson); mass spectrometry-grade formic acid and ammonium acetate (Sigma-Aldrich); calibration solution containing multiple calibrants in a solution of acetonitrile, trifluroacetic acid, and water (Agilent Technologies); metabolite standards and internal standards, including N-acetyl Aspartic acid-d3, Tryptophan-15N2, Sarcosine-d3, Glutamic acid-d5, Thymine-d4, Gibberellic acid, Trans-Zeatine, Jasmonic acid, 15N Anthranilic acid, and Testosterone-d3 (Sigma-Aldrich).
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Comprehensive Metabolite Profiling Approach

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High-performance liquid chromatography (HPLC)-grade ammonium acetate, acetonitrile, methanol, chloroform and water were procured from Burdick & Jackson (Morristown, NJ). MS grade formic acid, standards and internal standards, N-acetyl aspartic acid-d3, tryptophan-15N2, sarcosine-d3, glutamic acid-d5, thymine-d4, gibberellic acid, trans-zeatin, jasmonic acid, anthranilic acid-15N, and testosterone-d3, were purchased from Sigma-Aldrich (St. Louis, MO). Mixture of LPC 17:0/0:0, PG 17:0/17:0, PE 17:0/17:0, PC 17:0/17:0, TAG 17:0/17:0/17:0, SM 18:1/17:0, MAG 17:0, DAG 16:0/18:1, CE 17:0, ceramide 18:1/17:0, PA 17:0, PI 17:0/20:4, and PS 17:0/17:0. were obtained from Avanti polar lipids (USA) (Supplementary Table S1).
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5

Metabolomic Profiling of Eosinophilic Esophagitis

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Using mass spectrometry, 48 metabolites were measured and compared between children with active EoE and unaffected controls.
Metabolites and internal standards, including N-acetyl aspartic acid-d3, [15N]2 Tryptophan, Glutamic acid-d5, Thymine-d4, Gibberellic acid, Trans-Zeatine, Jasmonic acid, [15N] Anthranilic acid, and Testosterone-d3, were purchased from Sigma-Aldrich (St. Louis, MO).
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