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5 protocols using aspartate transaminase

1

Biochemical Analyses of Macroporous Resin

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D101 macroporous resin was purchased from the chemical plant of Nankai University (Tianjin, China). Aspartate transaminase (AST, Code No. C010-1), alanine aminotransferase (ALT, Code No. C009-1), myeloperoxidase (MPO, Code No. A044), lactate dehydrogenase (LDH, Code No. A020-1), malondialdehyde (MDA, Code No. A003-1), superoxide dismutase (SOD, Code No. A001-1), and glutathione (GSH, No. A005) kits were obtained from Nanjing Jiancheng Institute of Biotechnology (Nanjing, China). Hematoxylin (Code No. ZLI9606), eosin (Code No. ZLI9612), and diaminobenzidine (DAB, Code No. ZLI9632) staining kits were purchased from Zhongshan Golden Bridge Biotechnology (Beijing, China). Tissue Protein Extraction Kit (Code No. KGP2100) and Nuclear and Cytoplasmic Protein Extraction kit (Code No. KGP150) were obtained from KEYGEN Biotech. Co., Ltd. (Nanjing, China). Bicinchoninic acid Protein Assay Kit (BCA, Code No. P0012S) was purchased from Beyotime Institute of Biotechnology (Shanghai, China). RNAiso Plus (Code No. 9109), PrimeScript™ RT reagent Kit with gDNA Eraser (Perfect Real Time) (Code No. RR047A) and SYBR® Premix Ex Taq™ II (Tli RNaseH Plus) (Code No. RR820A) were purchased from TaKaRa Biotechnology Co., Ltd. (Dalian, China).
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2

Evaluating Hepatoprotective Compounds in Vitro

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PTS (purity >99%) was purchased from Meilunbio (Dalian, Liaoning Province, China). DOX was purchased from Sigma-Aldrich (St. Louis, MO, United States). Alanine transaminase (ALT) and aspartate transaminase (AST) were from Nanjing Jiancheng Institute of Biotechnology (Nanjing, China). Malondialdehyde (MDA), superoxide dismutase (SOD), and glutathione (GSH) kits were purchased from Solarbio (Beijing, China). Hematoxylin–eosin (H & E) and Masson staining kits were from Beyotime Biotechnology (Shanghai, China). 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) was provided by Roche Diagnostics (Basel, Switzerland). TUNEL staining kits (Green) were from Beyotime Biotechnology. The bicinchoninic acid (BCA) protein assay kit was from Thermo Scientific, lysis buffer and phenylmethanesulfonylfluoride (PMSF) were obtained from Beyotime Biotechnology. Human recombinant Trx-1 was from Med Chem Express (HY-P73431).
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3

Scleromitron Diffusum Flavonoid Extraction

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Scleromitron diffusum (Willd.) R. J. Wang (10 batches) were purchased from Jiangxi and identified by Prof. Tianai Gao from Shanxi Provincial Food and Drug Inspection Institute. Cellulase was obtained from Zhejiang Yinuo Biotechnology Co., Ltd (Zhejiang, China). The 36 flavonoid standards (seen in Table 3) were purchased from Sigma-Aldrich and Steraloids. Fenofibrate, formic acid, methanol, isopropanol, and acetonitrile were HPLC grade from Sigma. Macroporous adsorbent resin AB-8 was obtained from Chengdu Grecia Chemical Technology Co., Ltd. 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide (MTT), RMPI 1640 medium, fetal bovine serum (FBS), and trypsin were purchased from Wuhan Servicebio Biological Technology Co., Ltd (Wuhan, China). Triglyceride (TG), total cholesterol (TC), aspartate transaminase (AST), alanine transaminase (ALT), γ-Glutamyltranspeptidase (γ-GT), superoxide dismutase (SOD), glutathione (GSH), lactate dehydrogenase (LDH), alkaline phosphatase (ALP), and malondialdehyde (MDA) assay kits were supplied by Nanjing Jiancheng Bio-engineering Institute (Nanjing, China). Ethanol, methanol, formic acid, and acetonitrile were of chromatographic grade.
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4

Evaluation of Hepatoprotective Potential

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BBR (Sigma-Aldrich; Merck KGaA), BBR standard (Dalian Meilun Biotech Co., Ltd.), silymarin (Shanghai Yuanye Biotechnology Co., Ltd.), CCl4 (Xilong Chemical Co., Ltd.), detection kits for ROS, total superoxide dismutase (T-SOD), catalase (CAT), malondialdehyde (MDA), glutathione (GSH), aspartate transaminase (AST), alanine transaminase (ALT) and alkaline phosphatase (ALP) (all from Nanjing Jiancheng Bioengineering Institute), RNA extract (Google Biotechnology Co., Ltd., Wuhan, China), alcohol, isopropanol and trichloromethane (all from Sinopharm Chemical Reagent Co., Ltd.) were purchased from the suppliers indicated. HyPure™ molecular biology grade water was purchased from HyClone; GE Healthcare Life Sciences. The RevertAid First Strand cDNA Synthesis kit was procured from Thermo Fisher Scientific, Inc. FastStart Universal SYBR Green Master (Rox) was supplied by Roche Diagnostics. Primers were synthesized by Sangon Biotech Co., Ltd.
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5

Antioxidant Properties of Chitosan

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CS of food grade (90.32% deacetylated, average molecular weight of 37 kDa) was provided by Aoxin Pharmaceutical Co. Ltd. (Taizhou, China). The compounds 2,2′-azobis-(2-amidinopropane)-dihydrochloride (AAPH), 1,1-diphenyl-2-picrylhydrazyl (DPPH), fluorescein disodium, pyrogallic acid, and 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid (Trolox) of high purity were obtained from Sigma-Aldrich (St.Lousi, MO, USA). Glycyrrhizic acid (GA) was purchased from Xi’an Liqun Pharmaceutical Co. Ltd. (Xi’an, China). Ascorbic acid (VC), sodium selenite, acetic acid, and other reagents of analytical grade were obtained from local commercial suppliers (Sinopharm Chemical Reagent Co., Ltd., Shanghai, China, etc). The assay kits for measuring protein content, alanine transaminase (ALT), aspartate transaminase (AST), lactic dehydrogenase (LDH), glutathione (GSH), thiobarbituric acid-reactive substances (TBARS), superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) were supplied by Jiancheng Bioengineering Institute (Nanjing, China).
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