title: The phylogenic expression of plasmolipin in the vertebrate nervous system.
abstract: Plasmolipin is a plasma membrane proteolipid is a major myelin membrane component (Cochary et al., 1990). In this study we report the phylogenic expression of plasmolipin in the vertebrate nervous system. Using Western blot analysis with polyclonal antibodies, we have analyzed membrane fractions, including myelin, from elasmobranchs, teleosts, amphibians, reptiles, birds and mammals. On the basis of immune detection, plasmolipin appears to be restricted to the mammalian nervous system. Comparison of the central and peripheral nervous systems of mammals showed only minor differences in the level of plasmolipin in these two regions. Within mammals, little quantitative differences were observed when rat, human and bovine membrane fractions were compared. The late evolutionary expression of plasmolipin which results in its restriction to mammals makes it unique among the (major) myelin proteins. The potential physiologic significance of these data are discussed.
authors.affiliation: Division of Neurobiology, Nathan Kline Institute, Orangeburg, NY.
authors.forename: V S
authors.initials: VS
authors.lastname: Sapirstein
authors.forename: C E
authors.initials: CE
authors.lastname: Nolan
authors.forename: I
authors.initials: I
authors.lastname: Fischer
authors.forename: E
authors.initials: E
authors.lastname: Cochary
authors.forename: S
authors.initials: S
authors.lastname: Blau
authors.forename: C J
authors.initials: CJ
authors.lastname: Flynn
mesh_terms: D000663:Amphibians; D000818:Animals; D001717:Birds; D015153:Blotting, Western; D001923:Brain Chemistry; D002417:Cattle; D002462:Cell Membrane / Q000737:chemistry; D005399:Fishes; D006801:Humans; D008322:Mammals; D008565:Membrane Proteins; D009186:Myelin Sheath / Q000737:chemistry; D062806:Myelin and Lymphocyte-Associated Proteolipid Proteins; D009419:Nerve Tissue Proteins; D009420:Nervous System / Q000737:chemistry*; D010525:Peripheral Nerves / Q000737:chemistry; D010802:Phylogeny; D011510:Proteolipids / Q000032:analysis*; D051381:Rats; D012104:Reptiles; D013116:Spinal Cord / Q000737:chemistry; D014018:Tissue Distribution
chemical_list: D008565:Membrane Proteins; D062806:Myelin and Lymphocyte-Associated Proteolipid Proteins; D009419:Nerve Tissue Proteins; C048897:PLLP protein, human; C489076:Pllp protein, rat; D011510:Proteolipids