Neurofilament Light Polypeptide
Neurofilament Light Polypeptide - Related Videos
04:33
Fluorescence Photoactivation Imaging of Neurofilament Transport in Myelinated Mouse Axons
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2025
Source: Boyer, N. P. et. al., Imaging and Analysis of Neurofilament Transport in Excised Mouse Tibial Nerve. J. Vis. Exp. (2020) This video demonstrates the fluorescence photoactivation method to analyze neurofilament transport in myelinated axons of peripheral nerves. By tracking photoactivated green fluorophore-tagged neurofilaments, the technique provides insights into axonal transport in neurodegenerative diseases.
07:35
Non-chromatographic Purification of Recombinant Elastin-like Polypeptides and their Fusions with Peptides and Proteins from Escherichia coli
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Cited by 48 •
2014
Elastin-like polypeptides are stimulus-responsive biopolymers with applications ranging from recombinant protein purification to drug delivery. This protocol describes the purification and characterization of elastin-like polypeptides and their peptide or protein fusions from Escherichia coli using their lower critical solution temperature phase transition behavior as a simple alternative to chromatography.
09:42
Using SecM Arrest Sequence as a Tool to Isolate Ribosome Bound Polypeptides
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Cited by 6 •
2012
We describe here a technique that is now routinely used to isolate stably bound ribosome nascent chain complexes (RNCs). This technique takes advantage of the discovery that a 17 amino acid long SecM "arrest sequence" can halt translation elongation in a prokaryotic (E. coli) system, when inserted into (or fused to the C-terminus) of virtually any protein.
10:15
Isolation of Ribosome Bound Nascent Polypeptides in vitro to Identify Translational Pause Sites Along mRNA
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Cited by 2 •
2012
A technique to identify translational pause sites on mRNA is described. This procedure is based on isolation of nascent polypeptides accumulating on ribosomes during in vitro translation of a target mRNA, followed by the size analysis of the nascent chains using a denaturing gel electrophoresis.
09:52
Imaging and Analysis of Neurofilament Transport in Excised Mouse Tibial Nerve
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Cited by 2 •
2020
We describe fluorescence photoactivation methods to analyze the axonal transport of neurofilaments in single myelinated axons of peripheral nerves from transgenic mice that express a photoactivatable neurofilament protein.
FAQs
Because neurofilaments help preserve axonal shape and caliber, disruption of an axon can change the amount of NfL available outside the damaged fiber. Detectable NfL therefore provides evidence consistent with neuroaxonal injury or degeneration, rather than a direct readout of a behavioral state. Its value lies in connecting structural neural damage with observed clinical or behavioral changes.
Measurement differs by biological compartment. Cerebrospinal fluid generally contains the more direct signal after axonal injury, whereas smaller amounts reach the bloodstream. Sensitive immunoassays are therefore important, particularly for blood-based measurements. Comparing these sources requires attention to what each reflects, but neither automatically identifies the affected behavior, disease, or precise site of injury.
NfL is best interpreted as a marker of neuroaxonal integrity, not as a behavior-specific molecule. A higher measurement can support the presence of neural injury or degeneration, but the source does not establish that it distinguishes one diagnosis from another. Behavioral neuroscience studies should therefore relate NfL to cognition, movement, or behavior while retaining clinical and biological context.
A basic research workflow is to obtain cerebrospinal fluid or blood, quantify NfL with a sensitive immunoassay, and interpret the result alongside relevant behavioral or clinical observations. The assay supplies a molecular measure of neuroaxonal change; behavioral testing supplies the functional context. Together, these measurements can examine whether behavioral changes coincide with evidence of neural injury.
Longitudinal measurement can help track disease activity or evaluate treatment response, because repeated NfL results may be compared with changes over time. In this application, the value is not a single number in isolation but its relationship to the course of neurological disease and associated cognition, movement, or behavior. The source does not specify a universal threshold for response.
In behavior-focused research, NfL can serve as a bridge between observable changes and underlying neural pathology. Investigators may examine whether altered cognition, movement, or behavior occurs alongside evidence of neuroaxonal injury. This approach strengthens biological interpretation, but NfL alone cannot show that a specific behavior caused the injury or that one behavioral pattern has a unique NfL signature.