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7 protocols using il 6 elisa kit

1

Quantifying Pro-inflammatory Cytokines

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Pro-inflammatory cytokine concentration of IL-1β in the cell culture supernatant was determined by using the Human IL-1β enzyme-linked immunosorbent assay (ELISA) Kit (EK0392, BOSTER, Wuhan, China) following the supplier’s protocol.
IL-6 ELISA Kit (EK0411, BOSTER, Wuhan, China).
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2

Intestinal Permeability Biomarkers Assessment

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Diamine oxidase (DAO) and D-lactate (D-LA) are two markers of intestinal permeability. ELISA kits (CSB-E10090m, CUSABIO, Wuhan, China; JLC084, JKBIO, Shanghai, China) were used to assess the serum level of DAO and D-LA. The entire procedure was carried out in accordance with the manufacturer’s instructions. According to the manufacturer’s instructions, IL-6 ELISA Kit (EK0411, BOSTER, Wuhan, China) and TNF-ELISA Kit (EK0527, BOSTER, Wuhan, China) were used to determine the serum concentrations of the inflammatory factor interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α). At 450 nm, the OD value was measured.
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3

CMS Rat Model and STAT3 Inhibition

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An STAT3 inhibitor (CAS no.14556632-40-8; product no. SH-4-54; purity >98%) was purchased from Med Chem Express Co., Ltd. (USA). Anti-MMP-9 (catalog no. # ab38898), Anti-P-STAT3 (catalog no. # ab32143), STAT3 (catalog no. # ab68153) Anti-P-JAK2 (catalog no. # ab32101), JAK2 (catalog no. # ab108596), and anti-β-actin (catalog no. # ab8229) antibodies were obtained from Abcam (Cambridge, MA, USA). The sequences of the forward and reverse primers for MMP-9 and GAPDH were designed using primer 3 and synthesized by Jinsirui Co., Ltd. (Nanjing, China). The IL-6 ELISA kit (catalog no. # EK0410) was purchased from Boster Biotechnology Co., Ltd. (Wuhan, China). The QIAGEN miRNeasy mini kit (catalog no. # 217004) was obtained from QIAGEN (Germany). The TaKaRa PrimeScript RT reagent kit (catalog no. #RR036A) and TaKaRa TB Green Premix Ex Taq (catalog no. #RR820A) were purchased from TaKaRa (Japan). ProLong™ Gold antifade reagent (P36931) was obtained from Invitrogen (Thermo Fisher Scientific, USA). The CMS rat model was established in an automatically adjusted low-pressure hypobaric chamber (DYC-300, Guizhou Fenglei Oxygen Chamber Co., Ltd., Guizhou, China).
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4

Quantification of Immune Markers in Serum

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The levels of MCP-1, IL-6, IL-10, and Arg1 in serum were measured by mouse MCP-1 ELISA Kit, IL-6 ELISA Kit, IL-10 ELISA Kit (Bosterbio, Wuhan, China), and Arg1 ELISA Kit (Cusabio, Wuhan, China) with the instructions provided by manufacturers. The absorbance was read using a microplate reader (Multiskan Spectrum, Thermo).
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5

Quantifying Inflammatory Cytokine Levels

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The concentrations of interleukin 6 (IL-6), interleukin 1β (IL-1β), and tumor necrosis factor α (TNF-α) in medium were evaluated by IL-6 ELISA KIT, IL-1β ELISA KIT, and TNF-α ELISA KIT (Boster, Wuhan, China) as instructed by the manufacturer, respectively. The absorbance was measured under a microplate spectrophotometer (Olympus).
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6

Quantification of secreted IL-6 and IL-8 from CAFs and NFs

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For the collection of conditional medium (CM), CAFs or NFs (1.25 × 105 cells) were seeded in the collagen-coated flat bottom six-well plate and maintained in DMEM medium (Gibco) containing 1% or 10% FBS (Gibco) for 48 h. The medium was harvested and centrifuged at 800 × g for 5 min. The clear supernatant was then collected as CM.
For detection of the amount of secreted human IL-6, IL-8 in CAF-CM, or NF-CM, the enzyme-linked immunosorbent assay (ELISA) assay was performed using ELISA assay kit purchased from Boster Biological Technology: IL6 ELISA kit (Boster, Cat#EK0410), IL8 ELISA kit (Boster, Cat#EK0413). Dilution (1:10) was performed on the CM before quantifying the amount of cytokines according to the manufacturer’s protocol.
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7

Quantifying IL-6 Secretion in CAFs vs. NAFs

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To detected IL-6 production by CAFs and NAFs, cells were seeded in a six-well plate cultured at incubated at 37 °C and 5% CO2 humidified atmosphere. As the cells grown to 80% confluence, then cultured with fresh serum-free media and the supernatant was collected at 24 h. The IL-6 ELISA Kit was purchased from Boster Biological Technology (Pleasanton, CA). The measurement according to the manufacturer’s instructions.
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