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  • Title: Molecular specificity of L2 monoclonal antibodies that bind to carbohydrate determinants of neural cell adhesion molecules and their resemblance to other monoclonal antibodies recognizing the myelin-associated glycoprotein.
    Author: Noronha AB, Ilyas A, Antonicek H, Schachner M, Quarles RH.
    Journal: Brain Res; 1986 Oct 22; 385(2):237-44. PubMed ID: 2430667.
    Abstract:
    L2 monoclonal antibodies and HNK-1 have been shown to bind to related carbohydrate determinants in the myelin-associated glycoprotein (MAG) and several adhesion molecules of the nervous system including neural cell adhesion molecule (N-CAM), L1 and J1. It is shown here that MAG is the principal component in human white matter binding the L2 antibodies, but the most prominent antigens with the L2 epitopes in human gray matter are of higher Mr. It is also shown that the L2 antibodies resemble HNK-1 in binding to some 19-28 kDa glycoproteins and some sulfated, glucuronic acid-containing sphingoglycolipids of the peripheral nervous system (PNS). In addition, monoclonal and polyclonal antibodies raised to human MAG are shown to cross react with bovine N-CAM due to the presence of common carbohydrate constituents. The results further emphasize the shared antigenicity between MAG, N-CAM and other adhesion molecules. In addition, they demonstrate that the L2 antibodies belong to a family of monoclonal antibodies (including HNK-1, human IgM paraproteins associated with neuropathy, and others) that are characterized by reactivity against carbohydrate determinants shared by human MAG, the 19-28 kDa glycoproteins of the PNS and the sulfated, glucuronic acid-containing sphingoglycolipids of the PNS.
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