Anti-CNPase antibody [11-5B] (ab6319)

IHC-P image of CNPase staining on rat brain sections using ab6319 (1/1600). heat mediated antigen retrieval on paraffin embedded sections was performed using citric acid. The sections were then blocked with 1% BSA for 10 min at 21°C. The primary antibody was incubated for 16 hours at 21°C. The sections were then incubated in Goat anti-mouse (Biotin) at 1:200.

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Lane 1: Wild-type HAP1 whole cell lysate (40 µg)
Lane 2: CNPase knockout HAP1 whole cell lysate (40 µg)
Lane 3: Human Brain whole cell lysate (20 µg)

Lanes 1 - 3: Merged signal (red and green). Green - ab6319 observed at 48 kDa. Red - loading control, ab181602, observed at 37 kDa.

ab6319 was shown to recognize CNPase in wild-type HAP1 cells as signal was lost at the expected MW in CNPase knockout cells. Additional cross-reactive bands were observed in the wild-type and knockout cells. Wild-type and CNPase knockout samples were subjected to SDS-PAGE. Ab6319 and ab181602 (Rabbit anti-GAPDH loading control) were incubated overnight at 4°C at 5 μg/ml and 1/20000 dilution respectively. Blots were developed with Goat anti-Mouse IgG H&L (IRDye^® 800CW) preabsorbed ab216772 and Goat anti-Rabbit IgG H&L (IRDye^® 680RD) preabsorbed ab216777 secondary antibodies at 1/20000 dilution for 1 hour at room temperature before imaging.

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Overlay histogram showing SH-SY5Y cells stained with ab6319 (red line). The cells were fixed with 80% methanol (5 min) and then permeabilized with 0.1% PBS-Tween for 20 min. The cells were then incubated in 1x PBS / 10% normal goat serum / 0.3M glycine to block non-specific protein-protein interactions followed by the antibody (ab6319, 2µg/1x10⁶ cells) for 30 min at 22ºC. The secondary antibody used was DyLight^® 488 goat anti-mouse IgG (H+L) (ab96879) at 1/500 dilution for 30 min at 22ºC. Isotype control antibody (black line) was mouse IgG1 [ICIGG1] (ab91353, 2µg/1x10⁶ cells) used under the same conditions. Acquisition of >5,000 events was performed. This antibody gave a positive signal in SH-SY5Y cells fixed with 4% paraformaldehyde (10 min)/permeabilized with 0.1% PBS-Tween for 20 min used under the same conditions.

IHC image of CNPase staining in human cerebral cortex formalin fixed paraffin embedded tissue section, performed on a Leica Bond™ system using the standard protocol F. The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH6, epitope retrieval solution 1) for 20 mins. The section was then incubated with ab6319, 5µg/ml, for 15 mins at room temperature and detected using an HRP conjugated compact polymer system. DAB was used as the chromogen. The section was then counterstained with haematoxylin and mounted with DPX.

For other IHC staining systems (automated and non-automated) customers should optimize variable parameters such as antigen retrieval conditions, primary antibody concentration and antibody incubation times.

ab6319 staining CNPase in Mouse brain tissue sections by Immunohistochemistry (IHC-Fr - frozen sections). Tissue was fixed with formaldehyde, permeabilized with 0.1% Triton and blocked with mouse on mouse blocking solution for 1 hour at 20°C. Samples were incubated with primary antibody (1/100) for 8 hours at 4°C. An Alexa Fluor^® 488-conjugated Goat anti-mouse IgG polyclonal (1/200) was used as the secondary antibody.

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ab6319 staining CNPase in the rat oligodendrocytes by ICC/IF (Immunoytochemistry/immunofluorescence). Cells were fixed with paraformaldehyde, permeabilized with methanol and blocked with 5% BSA for 1 hour at 37°C. Samples were incubated with primary antibody (1/100 in PBS) for 18 hours at 4°C. An Alexa Fluor^® 594-conjugated Goat anti-mouse IgG polyclonal (1:200) was used as the secondary antibody.

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ab6319 staining mouse brain tissue sections by IHC-FoFr.  Sections were PFA fixed and permeabilized in 0.1% Triton X-100 prior to blocking in 0.5% TNB for 30 minutes at 25°C. The primary antibody was diluted 1/250 and incubated with the sample for 18 hours at 25°C. An Alexa Fluor^® 488 conjugated goat anti-mouse antibody, diluted 1/250, was used as the secondary.

Image demonstrates a 2-D depth projection through the superficial cortex.

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ab6319 staining CNPase in Dog Cerebellum tissue sections by Immunohistochemistry (IHC-P - paraformaldehyde-fixed, paraffin-embedded sections). Tissue was fixed with formaldehyde and blocked with 1% BSA for 10 minutes at 21°C; antigen retrieval was by heat mediation in a citrate buffer. Samples were incubated with primary antibody (1/1500 in blocking buffer) for 2 hours at 21°C. A Biotin-conjugated Goat anti-mouset IgG polyclonal (1/200) was used as the secondary antibody.

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ICC/IF image of ab6319 stained SKNSH cells. The cells were 4% formaldehyde fixed (10 min) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody ab6319 at 10µg/ml overnight at +4°C. The secondary antibody (pseudo-colored green) was Alexa Fluor^® 488 goat anti- mouse (ab150117) IgG (H+L) preadsorbed, used at a 1/1000 dilution for 1h. Alexa Fluor^® 594 WGA was used to label plasma membranes (pseudo-colored red) at a 1/200 dilution for 1h at room temperature. DAPI was used to stain the cell nuclei (pseudo-colored blue) at a concentration of 1.43µM for 1hour at room temperature.

ab6319 at a 1/200 dilution staining rat spinal cord tissue sections from a 4% PFA transcardially perfused animal by Immunohistochemistry (Frozen sections). The tissue was paraformaldehyde fixed and incubated with the antibody for 18 hours. Bound antibody was detected using an HRP conjugated goat anti-mouse polyclonal antibody.

This image is courtesy of an Abreview submitted by Nancy Nutile-McMenemy.

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