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6 protocols using e el r0505c

1

Hemin and CORM-2 Inflammasome Modulation

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Hemin (no. 51280), zinc protoporphyrin IX (ZnPPIX) (no.282820), Carbon monoxide (CO)-releasing molecule 2 (CORM-2) (no.288144), and dextran 4000 Da (FD-4) (46944) were obtained from Sigma-Aldrich (St. Louis, MO, USA). Dimethylsulfoxide (DMSO) (D3870), phosphate buffer saline (PBS) (P1020), and 4% paraformaldehyde (P1110) were obtained from Beijing Solarbio Science & Technology Co. Ltd. (Beijing, China). CORM-2 was dissolved in 0.5% of DMSO at 37°C in a sterile incubator for 24 h, and the resulting inactive CORM-2 (iCORM-2) was used as a negative control. Antibodies used were to caspase-1 (ab1872; Abcam, Shanghai, China), gasdermin D (GSDMD) (ab219800; Abcam, Shanghai, China), and caspase-11 p20 (sc-374615; Santa Cruz Biotechnology, Texas, USA). Enzyme-linked immunosorbent assay (ELISA) kits included rat tumor necrosis factor-α (TNF-α) (E-EL-R0019c), rat interleukin-1β (IL-1β) (E-EL-R0012c), rat IL-18 (E-EL-R0567c), and rat high mobility group box protein 1 (HMGB1) (E-EL-R0505c) (Elabscience Biotechnology Co., Ltd., Wuhan, China). The ELISA results were analyzed using a Multiskan Spectrum spectrophotometer (Thermofisher Scientific, Waltham, MA, USA).
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2

Rat Inflammation Biomarker ELISA Assays

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Rat IL-1β (EK301BHS), TNF-α (EK382HS), and IL-6 (EK306/3) enzyme-linked immunosorbent assay (ELISA) kits were purchased from Multisciences Biotech (Hangzhou, Zhejiang, China). Rat HMGB1 (E-EL-R0505c), thromboxane B2 (TXB2, E-EL-R0965c), 6-keto prostaglandin F1 alpha (6-keto-PGF1α, E-EL-0054c) ELISA kits were procured commercially (Elabscience Biotechnology, Wuhan, Hubei, China). Rabbit polyclonal antibodies against HMGB1 (#6893S), receptor for advanced glycation end products (RAGE, #6996S), p-NF-κB p65 (#3033S), NF-κB p65 (#8242S), Janus kinase (JNK; #9252s), p-JNK (#4668s), ERK (#9102S), p-ERK (#4376s), p38 MAPK (#8690S), p-p38 MAPK (#4511S), and glyceraldehyde 3-phosphate dehydrogenase (GAPDH; #5174S) were purchased from Cell Signaling Technology (Beverly, MA, United States). Rabbit monoclonal antibodies against VCAM-1 (#ab134047) and mouse monoclonal antibodies against ICAM-1 (#ab171123) were purchased from Abcam (Cambridge, MA, United States).
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3

Quantification of Inflammatory Mediators in Rats

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Twenty-four hours after the last administration, 2 mL of venous blood was collected from each experimental rat by subclavian venipuncture. The concentrations of TgAbs, HMGB1, TNF-α, IL-6, IL-1β and monocyte chemoattractant protein-1 (MCP-1) in rats were detected with ELISA kits according to the manufacturer’s protocol (TgAbs: #m1003044, Kangting, Tianjin, China; HMGB1: E-EL-R0505c, Elabscience, China; TNF-α: EK382/3-96, Multisciences, China; IL-6: ER306/3-96, China; IL-1β: E-EL-R0012c, Elabscience, China; MCP-1: E-EL-R0633c, Elabscience, China). The secretion of HMGB1, TNF-α, IL-6, IL-1β and MCP-1 by cell lines was detected with ELISA kits according to the manufacturer’s protocol (HMGB1: E-EL-H1554c, Elabscience, China; TNF-α, EK182HS-48, Multisciences, China; IL-6, EK106/2-48, Multisciences, China; IL-1β: E-EL-H0149c, Elabscience, China; MCP-1: E-EL-H6005, Elabscience, China).
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4

Assessing Inflammatory Markers in Rat Model

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Blood was collected at 4 weeks after treatment with sivelestat sodium hydrate while rats were under anesthesia (35 mg/kg pentobarbital) and centrifuged at 12,000 × g for 10 min at 4°C. The supernatant was collected and used to determine the levels of TNF-α (EM010-96) and IL-6 (EM004-96) production and using commercial enzyme-linked immunosorbent assay (ELISA; ExCell Bio, Taichang, China) kits and an ELISA reader (Bio-Rad Laboratories, Inc.) at 405 nm. Nitrite concentrations were measured using a commercial kit (A038; Nanjing Jiancheng Biology Engineering Institute, Nanjing, China) and an ELISA reader (Bio-Rad Laboratories, Inc.) at 540 nm. HMGB1 secretion were measured using a commercial kit (E-EL-R0505c; Elabscience Biotechnology Co., Ltd., Wuhan, China) at 450 nM.
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5

Multiplex Protein Detection in Biological Fluids

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Cold‐inducible RNA‐binding protein (SEG886Hu and SEG886Ra, Cloud‐Clone Corp.), mitochondrial transcription factor A (TFAM; SEH050Hu, Cloud‐Clone Corp.), interleukin 6 (IL‐6; E‐EL‐H0109c and E‐EL‐R0015c, Elabscience), interleukin 1 beta (IL‐1β; E‐EL‐R0012c, Elabscience), tumour necrosis factor‐alpha (TNF‐α; E‐EL‐R2856c, Elabscience) and high mobility group protein B1 (HMGB1; E‐EL‐R0505c, Elabscience) ELISA kits were used to detect these molecules in the UW solution, human serum and rat serum.
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6

Blood Sampling and ELISA Analysis in Rat Model

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On the 3rd day, after HRV monitoring, 6 rats from each group were anesthetized with isoflurane inhalation [17 (link), 18 (link)]; then, the chest cavity was dissected, and 2 mL of blood was taken from the right atrium for ELISA and 2 mL for flow cytometry (FCM). For ELISA, blood was preserved at room temperature for 2 h prior to centrifugation at 3000 r/min at 4°C for 10 min; then, the upper layer of the serum was separated and stored in the refrigerator at -80°C for detection. For FCM, fresh blood was taken for testing. According to the manufacturer's instructions [19 (link)], the serum levels of TNF-α, IL-1α, IL-10, IL-6, HMGB1, and sCD14 were determined with ELISA.
The main related antibodies include: rat anti-TNF-α (lot number: E-EL-R0019c, manufacturer: Elabscience), rat anti-IL-1α (lot number: E-EL-R0011c, manufacturer: Elabscience), rat anti-IL-6 (lot number: E-EL-R0015c, manufacturer: Elabscience), rat anti-IL-10 (lot number: E-EL-R0016c, manufacturer: Elabscience), rat anti-HMGB-1 (lot number: E-EL-R0505c, manufacturer: Elabscience), and rat anti-sCD14 (lot number: CSB-E11178r, manufacturer: Cusabio).
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