PMID- 2115070 OWN - NLM STAT- MEDLINE DCOM- 19900817 LR - 20190630 IS - 0022-3042 (Print) IS - 0022-3042 (Linking) VI - 55 IP - 2 DP - 1990 Aug TI - Neurofilament proteins are distributed in a diminishing proximodistal gradient along rat sciatic nerve. PG - 453-60 AB - Neurofilament (NF) proteins are distributed in a diminishing proximodistal gradient along rat sciatic nerve when compared with total noncollagen or other proteins in nerve. About a twofold decline of NF proteins can be detected by quantitating nerve proteins that have been separated by gel electrophoresis. A similar decrease of immunoreactivity to each NF subunit is seen in distal nerve segments when noncollagen nerve proteins are immunoblotted. Parallel decreases occur in all three NF proteins, thereby maintaining neurofilament subunit stoichiometry along the neuraxis. The same NF gradient can be detected when the NF contents in nerve branches to the gluteus and gastrocnemius muscles are compared with each other and with those in nerve segments taken from the same proximodistal levels of the parent sciatic nerve. The gradient of NF proteins increases during postnatal development and is readily detected by postnatal day 16. During the same period of development, the heavy NF subunit appears for the first time and is rapidly incorporated throughout the sciatic nerve. Hence, the NF gradient becomes manifest during the development and maturation of the adult form of the axonal cytoskeleton. The basis for the proximodistal gradient of NF proteins in peripheral nerve is presently unknown. The extent of the gradient cannot be accounted for on the basis of diminishing numbers of nerve fibers or increasing amounts of other nerve proteins, e.g., collagen, in distal nerve. An alternative interpretation is that the gradient reflects a low level of NF protein turnover during axonal transport. FAU - Schlaepfer, W W AU - Schlaepfer WW AD - Department of Pathology and Laboratory Medicine, University of Pennsylvania, School of Medicine, Philadelphia 19104-6079. FAU - Bruce, J AU - Bruce J LA - eng GR - NS 15722/NS/NINDS NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - J Neurochem JT - Journal of neurochemistry JID - 2985190R RN - 0 (Intermediate Filament Proteins) RN - 0 (Neurofilament Proteins) RN - 0 (neurofilament protein L) RN - 108688-71-7 (neurofilament protein H) RN - 111365-29-8 (neurofilament protein M) SB - IM MH - Animals MH - Electrophoresis, Polyacrylamide Gel MH - Enzyme-Linked Immunosorbent Assay MH - Immunoblotting MH - Intermediate Filament Proteins/*analysis MH - Molecular Weight MH - Nerve Fibers/analysis MH - Neurofilament Proteins MH - Rats MH - Rats, Inbred Strains MH - Sciatic Nerve/*analysis/growth & development MH - Tissue Distribution EDAT- 1990/08/01 00:00 MHDA- 1990/08/01 00:01 CRDT- 1990/08/01 00:00 PHST- 1990/08/01 00:00 [pubmed] PHST- 1990/08/01 00:01 [medline] PHST- 1990/08/01 00:00 [entrez] AID - 10.1111/j.1471-4159.1990.tb04157.x [doi] PST - ppublish SO - J Neurochem. 1990 Aug;55(2):453-60. doi: 10.1111/j.1471-4159.1990.tb04157.x.