Human Interleukin-6 Recombinant (E.coli)

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Human Interleukin-6 Recombinant (E.coli)

$70.00$2,700.00


accession P05231


Source Optimized DNA sequence encoding Human Interleukin-6 mature chain was expressed in E.Coli
Molecular weight Native human Interleukin-6 is generated by the proteolytic removal of the signal peptide and propeptide, the molecule has a calculated molecular mass of approximately kDa. Recombinant IL-6 is a homodimer protein consisting of amino acid residue subunits, and migrates as an approximately kDa protein under reducing conditions in SDS-PAGE.
Purity >97%, as determined by SDS-PAGE and HPLC
Biological Activity The ED(50) was determined by the dose-dependent stimulation of the proliferation ofmurineTD1 cells was found to be less than.1 ng/ml, corresponding to specific activity ofx107 IU/mg.
Protein Sequence MNSFSTSAFG PVAFSLGLLL VLPAAFPAPV PPGEDSKDVA APHRQPLTSS ERIDKQIRYI LDGISALRKE TCNKSNMCES SKEALAENNL NLPKMAEKDG CFQSGFNEET CLVKIITGLL EFEVYLEYLQ NRFESSEEQA RAVQMSTKVL IQFLQKKAKN LDAITTPDPT TNASLLTKLQ AQNQWLQDMT THLILRSFKE FLQSSLRALR QM
Endotoxin Endotoxin content was assayed using a LAL gel clot method. Endotoxin level was found to be less than.1 ng/µg(1EU/µg).
Presentation Interleukin-6 was lyophilized from a.2 μm filtered PBS solution pH.0.
Reconstitution A quick spin of the vial followed by reconstitution in distilled water to a concentration not less than.1 mg/mL. This solution can then be diluted into other buffers
Storage The lyophilized protein is stable for at least years from date of receipt at -20° C. Upon reconstitution, this cytokine can be stored in working aliquots at° -° C for one month, or at -20° C for six months, with a carrier protein without detectable loss of activity. Avoid repeated freeze/thaw cycles.
Usage This cytokine product is for research purposes only.It may not be used for therapeutics or diagnostic purposes.


Biological Process Acute-phase
Molecular function Cytokine
Molecular function Growth-factor

Methods

Increased TfR expression in CaCo-2 cells is not due to enhanced proliferation.

IL-6
  • Flow cytometry analysis of CaCo-2 cells double stained for CFSE dilution assay and TfR (mouse anti-human TfR stain), after incubation with the following inflammation mediators: TNFα, IL1β, IL-6, a mixture of the three, or CRM from mouse source.

Cells and cultures

  • The human KG1 leukemic cell line, RPMI8226 myeloma (MM) cell line, HepG2 hepatoma cell line, DU145 prostate carcinoma cell line, and A-MB231 breast cancer cell lines were obtained from American Type Culture Collection (ATCC) .
  • The MM cell line INA6 was kindly provided by Dr. Renate Burger (of, ).
  • Bone marrow mononuclear cells were isolated from fresh bone marrow aspirates of patients with myeloma and primary CD138+ myeloma cells were further sorted using CD138 MicroBeads as described previously

Processing whole blood samples

  • Peripheral (PB.1 and PB.2) and cord (CB.1 and CB.2) blood-derived CD34+ cells were obtained from AllCells .
  • Blood collections were performed at AllCells and Meriter Laboratories using standard, 8 ml Vacutainer Cell Processing Tubes (both sodium citrate and sodium heparin-based tubes are acceptable ; , ).
  • Appropriate documentation for informed consent was completed prior to blood collection .
  • Vacutainers were processed within 24 hours of collection.
  • Briefly, the PBMC-containing upper phase was collected and washed with ice-cold PBS .
  • Cells were either frozen down or used directly for purification with the CD34 MicroBead Kit and used according to the manufacturer's protocol.
  • Some samples were treated with Histopaque to minimize the number of red blood cells and centrifuged at 2000 rpm for 20 minutes without braking.
  • The interface containing the PBMCs was removed if samples were treated with histopaque, cells washed again with chilled PBS, centrifuged at 600× g for 15 minutes…
  • Peripheral (PB.1 and PB.2) and cord (CB.1 and CB.2) blood-derived CD34+ cells were obtained from AllCells .
  • Blood collections were performed at AllCells and Meriter Laboratories using standard, 8 ml Vacutainer Cell Processing Tubes (both sodium citrate and sodium heparin-based tubes are acceptable ; , ).
  • Appropriate documentation for informed consent was completed prior to blood collection .
  • Vacutainers were processed within 24 hours of collection.
  • Briefly, the PBMC-containing upper phase was collected and washed with ice-cold PBS .
  • Cells were either frozen down or used directly for purification with the CD34 MicroBead Kit and used according to the manufacturer's protocol.
  • Some samples were treated with Histopaque to minimize the number of red blood cells and centrifuged at 2000 rpm for 20 minutes without braking.
  • The interface containing the PBMCs was removed if samples were treated with histopaque, cells washed again with chilled PBS, centrifuged at 600× g for 15 minutes and either frozen down with CryoStor10 or used directly for purification.
  • CD34+ cell expansion media: StemSpan SFEM , Flt3, SCF, TPO each at a final concentration of 300 ng/ml, IL-6 (100 ng/ml) and IL-3 (10 ng/ml) , supplemented with DNaseI (final concentration at 20 U/ml), and 1× Antibiotic-antimycotic for overnight recovery.
  • efined expansion media: serum-free StemSpan H3000 , animal-free IL-6 , and recombinant human IL-3, , and SCF at the same concentrations listed above.
  • PBMC expansion media: , Supplement , Glutamax , SCF (250 ng/ml), IL-3 (20 ng/ml), Erythropoietin (2 U/ml, ), IGF-1 (40 ng/ml), and Dexamethasone (1 µM, ).
  • PBMCs were resuspended at 1×106 cells/ml for expansion.

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Exposure of IRAK3-depleted THP-1 cells to additional stress results in more inflammation and ROS.

100 ng/ml recombinant IL-6
  • Gene expression was analyzed using qRT-PCR and mROS production was determined by flow cytometry in THP-1 cells exposed to 5.5 mM D-glucose and 9.5 mM D-mannitol (osmotic control) or 15 mM D-glucose (n = 6), and 100 ng/ml IL-6 (n = 6).

Isolation of PBMCs and Monocyte-derived DC Generation

  • The DC generation procedure was followed as previously described by Romani et al.
  • and Kim et al.
  • 6/well) were incubated for 5 days in AIM V medium containing 800 U/mL of animal-free (AF) recombinant interleukin 4 (rhIL-4) and 1000 U/mL AF-recombinant granulocyte-monocyte colony-stimulating factor (rhGM-CSF) to induce immature DC (iDC).
  • Fresh medium containing these cytokines was replaced every 3 days.
  • On day 5, to induce mature DCs (mDCs), iDCs were exposed to a cytokine cocktail containing AF-recombinant IL-1β (1000 U/mL) , IL-6 (1000 U/mL) and TNF-α (1000 U/mL) .
  • After 6 h, a 10 µg/mL final concentration of PolyI:C was added to iDCs and cultured for 48 h. At day 7 or 8, the DC culture supernatant was collected and frozen at −80°C.
  • Then, mDCs were harvested and stained with PE or FITC-conjugated antibodies against CD11c, CD80, CD83, CD86, CD14, and HLA-DR and their appropriate isotype-matched regents .
  • Cell surface expression was…
  • The DC generation procedure was followed as previously described by Romani et al.
  • and Kim et al.
  • 6/well) were incubated for 5 days in AIM V medium containing 800 U/mL of animal-free (AF) recombinant interleukin 4 (rhIL-4) and 1000 U/mL AF-recombinant granulocyte-monocyte colony-stimulating factor (rhGM-CSF) to induce immature DC (iDC).
  • Fresh medium containing these cytokines was replaced every 3 days.
  • On day 5, to induce mature DCs (mDCs), iDCs were exposed to a cytokine cocktail containing AF-recombinant IL-1β (1000 U/mL) , IL-6 (1000 U/mL) and TNF-α (1000 U/mL) .
  • After 6 h, a 10 µg/mL final concentration of PolyI:C was added to iDCs and cultured for 48 h. At day 7 or 8, the DC culture supernatant was collected and frozen at −80°C.
  • Then, mDCs were harvested and stained with PE or FITC-conjugated antibodies against CD11c, CD80, CD83, CD86, CD14, and HLA-DR and their appropriate isotype-matched regents .
  • Cell surface expression was assayed by flow cytometry , and Cellquest was used to analyze the magnitude of surface molecule expression on the mDCs.
  • IL-12 and IL-10 levels were determined by enzyme-linked immunosorbent assay (ELISA) according to manufacturer’s instructions.

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