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2 protocols using uric acid

1

HPLC-based Metabolite Extraction and Analysis

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High performance liquid chromatography (HPLC) grade acetonitrile and methanol were purchased from Thermo Fisher Scientific Co., Ltd. (Fair Lawn, NJ, USA). Ultra-pure water was obtained from Hangzhou Wahaha Group Co., Ltd. (Hangzhou, China), N,O-bis(trimethylsilyl)trifluoro-acetamide (BSTFA) with 1% trimethylchlorosilane (TMCS), O-methoxyamine-HCl (MOX), succinic-d4 acid were purchased from Sigma–Aldrich (NJ, USA). Adenine, 4% tissue cell fixative, yeast powder, urease activity test kit, hematoxylin-eosin staining (HE) staining kit, Masson staining kit and standards for creatinine, uric acid, hypoxanthine, xanthine, urea, etc. were purchased from Beijing Solarbio Science & Technology Co., Ltd. (Beijing, China) and the purity of the above standands are all greater than 98%. The urea nitrogen test kit was purchased from Nanjing Jiancheng Bioengineering Institute (Nanjing, China). Other chromatographic reagents were obtained from domestic reagent companies.
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2

Quenching CAP-induced Cellular Stress

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Mannitol (200 mM, Catalog Number: M8140, Solarbio, China), sodium pyruvate (10 mM, Catalog Number: SP0100, Solarbio, China), uric acid (100 μM, Catalog Number: IU0150, Solarbio, China), tiron (20 mM, Catalog Number: T104954, Aladdin, China), hemoglobin (20 μM, Catalog Number: H8020, Solarbio, China), and monopotassium phosphate (1 mM, Catalog Number: P7392, Solarbio, China) were used to quench hydroxyl radical (OH·), hydrogen peroxide (H2O2), ozone (O3), superoxide anion (O2·-), nitric oxide (NO·), and electron (e-), respectively.
After treating cells with CAP for 2 or 4 min followed by incubation for 1 h, the quencher of each CAP component was added, separately. Viruses were added to cells and incubated for 1 h. The medium was refreshed, and cells were cocultured with viruses for additional 46 h prior to subsequent analyses.
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