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Immunomodulatory Agents in Inflammatory Conditions

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High glucose Dulbecco’s Modified Eagle Medium (DMEM), trypsin and penicillin–streptomycin, were obtained from Macgene (Beijing, China). Fetal bovine serum (FBS) was from PAN-Biotech (Aidenbach, Germany). Complete/Incomplete Freund’s adjuvant and LPS were from Sigma-Aldrich (St Louis, MO, USA). Bovine type II collagen was from Macklin (Shanghai, China). Methotrexate was obtained from Bidepharm (Shanghai, China). 4% paraformaldehyde was from Bioroyee Biotechnology (Beijing, China). EDTA and DAPI were from Solarbio (Beijing, China). Goat anti-rabbit secondary antibody, endogenous peroxidases blocker and goat serum albumin were from ZSGB-Biotech ((Beijing, China). PMA are purchased from Med Chem Express (MCE). Hoechst 33342 was obtained from TargetMol (Shanghai, China). Sytox Green was from Beyotime (Shanghai, China). Primary antibody of IL-6 was from Bioss (Beijing, China). Primary antibody of TNF-α was from Proteintech (Chicago, IL, USA). Primary antibodies against PI3K/p-PI3K were from Bioworld (St. Louis Park, MN, USA). Primary antibodies against p-Akt and p-mTOR were bought from Cell Signaling Technology (Beverly, MA, USA). Primary antibody against Akt was from Biogot (Nanjing, China). Antibodies of mTOR, MPO, CitH3 were from Abcam (Cambridge, UK).
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Fluorescent Peptide Synthesis and Evaluation

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Amino acids, 2-(naphthalene-2-yl) acetic acid, and O-(benzotriazole-1-yl)-N,N,N,N-tetramethyluronium hexafluorophosphate (HBTU) were purchased from Bidepharm (Shanghai, China). 1-Pyrenemethylamine hydrochloride and trifluoroacetic acid (TFA) were obtained from Energy Chemical (Beijing, China). 2-Cl-Trityl chloride resin was bought from Nankai Resin Co. Ltd (Tianjin, China). N,N-Diisopropylethylamine (DIEA) was purchased from J & K (Beijing, China). Glycine, phenylalanine, tyrosine, and methotrexate were bought from Bidepharm (Shanghai, China). Cy5.5 NHS ester was obtained from APExBIO (USA). ELISA kit for IL-6 was bought from MSKBIO (China). Matrigel was bought from Corning (USA). Tubulin, iNOS, IL-6, and TNF-α antibodies used in western blot were purchased from Abcam (ab7291, ab178945, ab259341, and ab215188, respectively). In immunofluorescence staining, F4/80 was obtained from Bioss (bsm-34028 ​M), iNOs was obtained from Proteintech (18985-1-AP), CD206 was obtained from Abcam (ab64693), CD31 was brought from Servicebio (GB11063-2). DAPI was obtained from Beyotime Biotechnology (Shanghai, China). Commercially available reagents were used without further purification.
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Methotrexate-Hyaluronic Acid Conjugate for Skin Cancer Treatment

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Methotrexate (MTX, purity ≥99%), hyaluronic acid (HA, 8–12 kDa), hyaluronic acid (HA, 100–200 kDa), 1-hydroxypyrrolidine-2,5-dione (NHS, purity ≥98%) and cysteamine hydrochloride were purchased from Bide Pharmatech Ltd. (Shanghai, China). 4M hydrogen chloride solution in 1,4-dioxane was purchased from Infinity Scientific Co. Ltd. (Beijing, China). 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI), 4-dimethylaminopyridine (DMAP), polylactic acid (PLA, 5000 Da), 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and fluorescein isothiocyanate (FITC) were obtained from Sigma-Aldrich Co. Ltd. (St. Louis, MO, USA). Dialysis tubing (500–1000 Da, 3500 Da) was purchased from Merck Chemicals Shanghai Co., Ltd (Shanghai, China). HaCaT cell line and fetal bovine serum (FBS) were purchased from Nanjing KeyGEN Biotech Co., Ltd. (Nanjing, China). DMEM medium, trypsin, and penicillin–streptomycin solution were purchased from Fcmacs Biotechnology Co., Ltd. (Nanjing, China). DAPI and Annexin V-FITC/PI staining kit were obtained from the Beyotime Institute of Biotechnology (Shanghai, China).
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