| Name: | Rabbit polyclonal antibody to degraded neurofilament NF-L |
| Immunogen: | Proprietary recombinant constrict containing amino acids of human NF-L expressed in and purified from E. coli. |
| HGNC Name: | NEFL |
| UniProt: | P07196 |
| Molecular Weight: | 68-70kDa by SDS-PAGE |
| Host: | Rabbit |
| Isotype: | |
| Species Cross-Reactivity: | Human, rat, mouse, cow, pig |
| RRID: | AB_2923499 |
| Format: | Purified antibody at 1mg/mL in 50% PBS, 50% glycerol plus 5mM NaN3 |
| Applications: | WB, ICC/IF, ELISA, IHC |
| Recommended Dilutions: | WB: 1:1,000-1:2,000. ICC/IF: 1:10,000 IHC: 1:5,000 |
| Storage: | Shipped on ice. Store at 4°C for short term, for longer term at -20°C. Avoid freeze / thaw cycles. |
Immunofluorescence of a section of spinal cord from a rat given a C4 contusion injury 3 days previously. The section was stained with mouse monoclonal to NF-M MCA-3H11 in green and counterstained with RPCA-NF-L-Degen at 1:1,000 in red. The RPCA-NF-L-Degen antibody does not stain the undamaged axons which are strongly positive for the NF-M antibody. However linear arrays of swollen profiles which originated from damaged axons are strongly positive for the rabbit NF-L-Degen antibody but not the NF-M antibody, although there is clearly some staining. The MCA-3H11 epitope, which is in the C-terminal “tail” of NF-M, has either been partially removed or destroyed.
Western blot analysis of different tissue lysates using rabbit pAb to degenerated forms of NF-L, RPCA-NF-L-Degen, dilution 1:2,000 in green: [1] protein standard, [2] rat brain, [3] rat spinal cord, [4] mouse brain, [5] mouse spinal cord, [6] cow spinal cord and [7] pig spinal cord. The strong band at about 68kDa corresponds to full length denatured NF-L protein.
Rabbit Polyclonal Antibody to NF-L DegenoTag™ Peptide
Cat# RPCA-NF-L-Degen
$150.00 – $1,000.00
Neurofilaments are major components of neurons and their axons (1-5). We have recently developed a series of novel reagents which we call DegenoTag™ products. These are antibodies which recognize epitopes in a small segment of the neurofilament NF-L subunit which are normally not accessible to antibodies but which became available on degeneration (6). We propose that these epitopes are made accessible as a result of degeneration induced proteolysis, and in agreement with this hypothesis we could make previously negative control tissues become strongly DegenoTag™ antibody positive by treatment with proteases. In addition fresh CNS tissues did not stain with DegenoTag™ reagents except for a tiny minority of apparently spontaneously degenerating processes. In stark contrast tissues left to sit at room temperature for 4 hours were strongly reactive with DegenoTag™ reagents. We also discovered that our antibodies to the C-terminal of NF-L, such as our rabbit polyclonal RPCA-NF-L-ct and mouse monoclonal MCA-DA2. Our reagents can therefore be used to positively identify both healthy and degenerated processes.
RPCA-NF-L-Degen was raised against a proprietary recombinant immunogen containing amino acids 311-375 of the human NF-L sequence (6,8). The antibody works well on western blots of a variety of species but binds only degenerated processes in sectioned material. It also works well on paraffin embedded histological sections of human brain and is an excellent capture reagent in ELISA. This and other DegenoTag™ reagents can be used to identify degenerating and degenerated processes and also to monitor NF-L degradation in a variety of contexts. Full details of these findings are described in our a BioRχiv and in greater detail in a peer-reviewed publication in Brain Communications. It also works well on paraffin embedded histological sections of rodent CNS tissues, including transgenic mouse models. EnCor also markets other DegenpoTag™ reagents such as MCA-1D44, MCA-6H63 and MCA-1B11, three mouse monoclonal antibodies each with different epitopes on NF-L. We also market a chicken polyclonal with similar specificity e than MCA-6H63 and the rabbit polyclonal CPCA-NF-L-Degen. Mouse select image for larger view.
Chromogenic immunohistochemistry on a formalin fixed paraffin embedded section of an ALS mouse model from the lab of Dr. David Borchelt (6). These heterozygous G85R-SOD1-YFP mice do not develop ALS unless they are primed by injection of mutant SOD1 aggregates, so this is a model of prion induction of pathogenesis. This mouse was injected with mutant SOD1 in the hind limb and degenerated processes were seen in the sciatic nerve, in fibers in the spinal cord and as shown here in the brain stem. Note swollen and sinusoidal Wallerian type profiles. Staining was performed with rabbit pAb to degenerated neurofilament NF-L, RPCA-NF-L-Degen, dilution 1:5,000, detected with DAB (brown) using the Vector Labs ImmPRESS method and reagents with no antigen retrieval. Hematoxylin (blue) was used as the counterstain. Mouse select image for larger view.
1. Hoffman et al. Neurofilament gene expression:a major determinant of axonal caliber. PNAS 84:3472-6 (1987).
2. Perrot R, et al. Review of the Multiple Aspects of Neurofilament Functions, and their Possible Contribution to Neurodegeneration. Mol. Neurobiol. 38:27-65 (2008).
3. Lépinoux-Chambaud C. Eyer J. Review on intermediate filaments of the nervous system and their pathological alterations. Histochem. Cell Biol. 140:13-22 (2013).
4. Liu Q. et al. Neurofilamentopathy in Neurodegenerative Diseases. Open Neurol. J. 5:58–62 (2011).
5. Bacioglu M, et al. Neurofilament light chain in blood and CSF as marker of disease progression in mouse models and in neurodegenerative diseases. Neuron 91:56-66 (2016).
6. Shaw G, et al. Uman Type NF-L Antibodies Are Effective Reagents for the Imaging of Neurodegeneration. BioRχiv DOI 10.1101/2022.08.27.504533 (2022).
7. Norgren N, et al. Monoclonal antibodies selective for low molecular weight neurofilaments. Hybrid Hybridomics 21:53-59 (2002).
8. Shaw G, et al. Uman type neurofilament light antibodies are effective reagents for the imaging of neurodegeneration. Brain Communications doi.org/10.1093/braincomms/fcad067.
