Biomaterial Database

The expression of myelin-associated glycoprotein in regenerating cat sciatic nerve. 1988

H J Willison, and B D Trapp, and J D Bacher, and R H Quarles

Developmental and Metabolic Neurology Branch, NINCDS, Bethesda, MD 20892.

A model of peripheral nerve regeneration in the cat in which freshly severed proximal axons penetrate a permanently transected distal stump, composed of quiescent Schwann cells has been used to study the pattern of myelin protein expression during myelination associated with axonal regeneration. The expression of the myelin-associated glycoprotein (MAG) and the compact myelin proteins P0 and P1 has been analyzed by immunoassays at sequential distances down the regenerating nerve. In the most proximal regenerating zone of this model, MAG is expressed at a significantly higher level (7.9% of normal) than P0 (2.3% of normal) or P1 (1.7% of normal). In addition, elevated levels of MAG are sustained farther into the distal stump than those of P0 and P1. These results are similar to the pattern of accumulation of myelin proteins seen during normal feline development and indicate that MAG, which is localized in part to the periaxonal Schwann cell membranes, may play an important role in the early events of establishing and maintaining the relationship between Schwann cell and axon. Neither MAG, nor P0, were detected in non-myelinating Schwann cells in the distal stump, although it is possible that they are present at levels below the detection threshold of the assays, which are approximately 0.1% of normal.

UI	MeSH Term	Description	Entries
D007700	Kinetics	The rate dynamics in chemical or physical systems.
D008970	Molecular Weight	The sum of the weight of all the atoms in a molecule.	Molecular Weights,Weight, Molecular,Weights, Molecular
D009185	Myelin Proteins	MYELIN-specific proteins that play a structural or regulatory role in the genesis and maintenance of the lamellar MYELIN SHEATH structure.	Myelin Protein,Protein, Myelin,Proteins, Myelin
D009416	Nerve Regeneration	Renewal or physiological repair of damaged nerve tissue.	Nerve Tissue Regeneration,Nervous Tissue Regeneration,Neural Tissue Regeneration,Nerve Tissue Regenerations,Nervous Tissue Regenerations,Neural Tissue Regenerations,Regeneration, Nerve,Regeneration, Nerve Tissue,Regeneration, Nervous Tissue,Regeneration, Neural Tissue,Tissue Regeneration, Nerve,Tissue Regeneration, Nervous,Tissue Regeneration, Neural
D012016	Reference Values	The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.	Normal Range,Normal Values,Reference Ranges,Normal Ranges,Normal Value,Range, Normal,Range, Reference,Ranges, Normal,Ranges, Reference,Reference Range,Reference Value,Value, Normal,Value, Reference,Values, Normal,Values, Reference
D002415	Cats	The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801)	Felis catus,Felis domesticus,Domestic Cats,Felis domestica,Felis sylvestris catus,Cat,Cat, Domestic,Cats, Domestic,Domestic Cat
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012584	Sciatic Nerve	A nerve which originates in the lumbar and sacral spinal cord (L4 to S3) and supplies motor and sensory innervation to the lower extremity. The sciatic nerve, which is the main continuation of the sacral plexus, is the largest nerve in the body. It has two major branches, the TIBIAL NERVE and the PERONEAL NERVE.	Nerve, Sciatic,Nerves, Sciatic,Sciatic Nerves
D018992	Myelin-Associated Glycoprotein	A myelin protein found in the periaxonal membrane of both the central and peripheral nervous systems myelin sheaths. It binds to cells surface receptors found on AXONS and may regulate cellular interactions between MYELIN and AXONS.	Large Myelin-Associated Glycoprotein Isoform,Sialic Acid Binding Ig-Like Lectin 4A,Sialic Acid Binding Ig-like Lectin 4,Siglec-4,Small Myelin-Associated Glycoprotein Isoform,Large Myelin Associated Glycoprotein Isoform,Myelin Associated Glycoprotein,Sialic Acid Binding Ig Like Lectin 4A,Sialic Acid Binding Ig like Lectin 4,Siglec 4,Small Myelin Associated Glycoprotein Isoform

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