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10 protocols using ab6102

1

Immunofluorescence and Western Blot Analyses

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Primary antibodies used for immunofluorescence assays were: mouse mAb anti-glycoprotein E of DENV (ab41349, Abcam), mouse mAb SA02-BG12 anti N protein of JUNV (Sánchez et al., 1989) , mouse mAb anti-hnRNP A2 (ab6102, Abcam), rabbit Ab anti-hnRNP K (R332, Cell Signaling), rabbit Ab anti-T7 (ab9115, Abcam) and rabbit immunosera obtained in our laboratory: anti-DENV-2, anti-JUNV and anti-VSV. Goat anti-mouse IgG conjugated to fluorescein isothiocyanate (FITC) or rhodamine (TRITC), used as secondary antibodies were purchased from Sigma-Aldrich.
Western blot analysis was performed employing mouse mAb anti-hnRNP A2 (ab6102, Abcam), rabbit Ab anti hnRNP K (R332, Cell Signalling), mouse mAb anti-glyceraldehyde 3-phosphate dehydrogenase (GAPDH, ab8245, Abcam), rabbit Ab anti-T7 (ab9115, Abcam) or rabbit Ab anti-histone H4 (sc-8660 R, Santa Cruz Biotechnology) as primary antibodies and peroxidase anti-rabbit IgG (W4011, Promega) or peroxidase anti-mouse Ig G (A9044, Sigma-Aldrich) as secondary antibodies.
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2

Western Blot Analysis of EV Markers

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50 μL of EV samples from Sham and TAC EV was directly mixed with 5x SDS sample buffer, boiled at 95°C for 3 minutes and then separated on a SDS‐PAGE gel. The total loaded protein amount was calculated by the intensity of Coomassie blue stain. The membrane was blocked in 5% skim milk solution and incubated overnight with an antibody directed against hnRNA A2B1 (Ab6102, Abcam, 1:5000), CD63 (Ab1318, Abcam, 1:1000), Flotillin 1 (Ab133497, Abcam, 1:10 000), TSG101 (Ab83, Abcam, 1:1000), H3 (Ab1791, Abcam, 1:1000) and SERCA2a (custom antibody from 21st Century Biochemicals, 1:3000). The membrane was then incubated with a horseradish peroxidase‐conjugated secondary antibody (Sigma) and developed with Western Lighting chemiluminescence reagent (PerkinElmer).
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3

Immunofluorescence Assay for hnRNPA2B1

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Cancer cells were seeded onto sterile slides into 24-well culture plates. Then, fixed cells with 4% paraformaldehyde for 20 min when reached a confluence of 80%. Following permeabilized membranes with 0.1% Triton X-100 for 10 min, blocked antigens with 10% goat serum for 30 min in room temperature. Cells were then incubated with anti-hnRNPA2B1 (ab6102, Abcam) at a 1:100 dilution overnight at 4 °C, followed by further incubation at room temperature for 1 h with AlexaFluor Plus 555 goat anti-mouse IgG secondary antibody (A32727, Thermo) and then labeled DNA with DAPI for 10 min.
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4

Immunocytochemistry of Myogenic Markers

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C2C12 myoblast cells were washed with PBS in a laminar flow hood and fixed with 4% paraformaldehyde for 10 min at RT in a chemical hood. Cells were permeabilized with 0.25% Triton-X100 in PBS containing 2% bovine serum albumin (Sigma) for 1 hr at RT. Cells were incubated with primary antibody at 4°C overnight, then incubated with secondary antibody at RT for 1 hr. Primary antibodies included mouse anti-Hnrnpa2b1 (ab6102, Abcam) at 1:200, mouse-anti-myogenin (ab82843, Abcam), and a mouse anti-MHC MF-20 (Developmental Studies Hybridoma Bank, University of Iowa) at undiluted, ‘neat’ concentration. Alexa Fluor secondary antibodies (Molecular Probes) were used at a 1:1,000 dilution.
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5

RIP Assay for hnRNPA2B1 RNA Binding

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EZ-Magna RIP RNA Binding Protein Immunoprecipitation Kit (17–700, Millipore) was used to perform RIP assays following the protocol. Anti-hnRNPA2B1 (ab6102, Abcam) antibody and normal mouse Ig (GCS200621, Millipore) were used to immunoprecipitated with target RNA or as a negative control. Finally, RNA was subjected to qRT-PCR analysis as described above to detect the enrichment between indicated RNA binding to hnRNPA2B1.
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6

Antibodies for Neurodegeneration Assays

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Anti-hnRNP A1 antibodies were obtained from Abcam (ab4791- rabbit polyclonal, ab5832 - mouse monoclonal) and Millipore (05-1521- mouse monoclonal; 04-1469 – mouse monoclonal). The anti-hnRNP A1 antibodies are specific for hnRNP A1-M9 and have been shown to overlap the M9 immunodominant epitope recognized by IgG isolated from MS patients [24 (link)]. Isotype-matched anti-rabbit IgGs were obtained from Abcam (ab107866) and Millipore (12-370). Antibodies were added to the culture media of SK-N-SH cells at a concentration of 8 ug/ml for each assay as determined in previous studies [12 ]. Primary antibodies utilized for protein detection by Western blot were as follows: spastin (SPG4-Abcam ab38150), paraplegin (SPG7-Abcam ab154989), spartin (SPG20-Abcam ab94950), and hnRNP A1-(Millipore 05-1521). Antibodies were used at manufacturers recommended concentration. Antibodies utilized for immunochemistry in granule studies were as follows: TAR-DNA Binding Protein (TDP-43 (Millipore MABN45)), GW-182 (Abcam ab70522), or hnRNP A2/B1 (Abcam ab6102).
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7

Western Blot Analysis of Hnrnpa2b1

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Western blot was performed according to standard protocols. Equal volumes (20 µl) of fractions were then resolved on a 4–12% Bis-Tris SDS-PAGE gel and transferred to a nitrocellulose membrane (Bio-Rad). Primary antibodies included mouse anti-Hnrnpa2b1 (1:200; ab6102, Abcam) and monoclonal rabbit anti-GAPDH (14C10) conjugated to HRP (1:2000; Cell Signaling, 3683S).
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8

Antibodies for Neurodegeneration Assays

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Anti-hnRNP A1 antibodies were obtained from Abcam (ab4791- rabbit polyclonal, ab5832 - mouse monoclonal) and Millipore (05-1521- mouse monoclonal; 04-1469 – mouse monoclonal). The anti-hnRNP A1 antibodies are specific for hnRNP A1-M9 and have been shown to overlap the M9 immunodominant epitope recognized by IgG isolated from MS patients [24 (link)]. Isotype-matched anti-rabbit IgGs were obtained from Abcam (ab107866) and Millipore (12-370). Antibodies were added to the culture media of SK-N-SH cells at a concentration of 8 ug/ml for each assay as determined in previous studies [12 ]. Primary antibodies utilized for protein detection by Western blot were as follows: spastin (SPG4-Abcam ab38150), paraplegin (SPG7-Abcam ab154989), spartin (SPG20-Abcam ab94950), and hnRNP A1-(Millipore 05-1521). Antibodies were used at manufacturers recommended concentration. Antibodies utilized for immunochemistry in granule studies were as follows: TAR-DNA Binding Protein (TDP-43 (Millipore MABN45)), GW-182 (Abcam ab70522), or hnRNP A2/B1 (Abcam ab6102).
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9

hnRNPA2B1 RNA Binding Immunoprecipitation

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EZ-Magna RIP RNA Binding Protein Immunoprecipitation Kit (17-700 , Millipore) was used to perform RIP assays following the protocol. Anti-hnRNPA2B1 (ab6102, Abcam) antibody and normal mouse Ig (GCS200621, Millipore) were used to immunoprecipitated with target RNA or as a negative control.
Finally, RNA was subjected to qRT-PCR analysis as described above to detect the enrichment between indicated RNA binding to hnRNPA2B1.
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10

Immunofluorescent Localization of hnRNPA2B1

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Cancer cells were seeded onto sterile slides into 24-well culture plates. Then, xed cells with 4% paraformaldehyde for 20 min when reached a con uence of 80%. Following permeabilized membranes with 0.1% Triton X-100 for 10 min, blocked antigens with 10% goat serum for 30 min in room temperature.
Cells were then incubated with anti-hnRNPA2B1 (ab6102, Abcam) at a 1:100 dilution overnight at 4 °C, followed by further incubation at room temperature for 1 h with AlexaFluor Plus 555 goat anti-mouse IgG secondary antibody (A32727, Thermo) and then labeled DNA with DAPI for 10 min.
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