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3 protocols using anti mll1 antibody

1

Protein Expression Analysis Protocol

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Crude protein in cell lysates was electrophoresed by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and transferred to a polyvinylidene difluoride membrane that was incubated with primary antibodies. Anti-IL-1β, anti-IL-6, and anti-TET1 antibodies were purchased from Thermo Fisher Scientific; anti-TLR5, anti-phospho-NFκB (p65) and anti-DNMT1 antibodies were from Abcam (Cambridge, UK); anti-MyD88, anti-EZH2, anti-H3K27Me3, and anti-H3K4Me3 antibodies were from Cell Signaling Technology (Danvers, MA, USA); anti-NOX4 and anti-DNMT3B antibodies were from Santa Cruz Biotechnology (Santa Cruz, CA, USA); and anti-MLL1 antibody was from Active Motif (Carlsbad, CA, USA). Then, the membranes were incubated with horseradish peroxidase-conjugated secondary antibodies (Pierce, Rockland, IL, USA), and protein bands were detected using an enhanced chemiluminescence western blotting detection kit (Amersham, Little Chalfont, Buckinghamshire, UK).
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2

ChIP-qPCR Analysis of H3K4me3 and MLL1

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As previously described (48 (link)), cells were fixed in 1% paraformaldehyde and glycine. This was followed by lysis and sonication using a Bioruptor Pico (Diagenode) to generate 300–500 bp fragments. Samples were then incubated overnight with anti-H3K4me3 antibody (39159, Active Motif), anti-MLL1 antibody (61296, Active Motif), or isotype control (rabbit polyclonal IgG; ab171870, Abcam), followed by the addition of protein A or protein G Sepharose beads (Thermo Fisher Scientific). Beads were washed; then, DNA was eluted and purified using phenol/chloroform/isoamyl alcohol extraction. The DNA was then precipitated using ethanol. H3K4me3 deposition was measured by qPCR using 2× SYBR PCR mix (Invitrogen), and primers (forward, 5′-TCTCTGACACCTTTGCCTGA-3′; reverse, 5′-CCAGTTCTCTTCCCTTGCAC-3′) were designed to flank the Ifnk promoter using NCBI Primer-BLAST.
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3

Western Blot Analysis of Epigenetic Regulators

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Cell lysates (50 μg protein) were electrophoresed, transferred, and immunoblotted with specific antibodies. Anti-AhR, anti-TET1, and anti-TBP antibodies were purchased from Thermo Fisher Scientific, Inc.; the anti-DNMT1 antibody was from Abcam (Burlingame, CA, USA); the anti-DNMT3B antibody was from Santa Cruz Biotechnology (Santa Cruz, CA, USA); the anti-p16INK4A and anti-EZH2 antibodies were from Cell Signaling Technology, Inc. (Danvers, MA, USA), and the anti-MLL1 antibody was purchased from Active Motif (Carlsbad, CA, USA). The membranes with bound primary antibodies (1:1000) were reacted with horseradish peroxidase (HRP)-conjugated secondary antibodies (Pierce, Rockland, IL, USA), and the protein bands were assessed by a western blotting detection kit (Amersham, Little Chalfont, Buckinghamshire, UK).
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