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Titolo:
2 MITOGENIC REGIONS OF MYELIN BASIC-PROTEIN INTERACT WITH DIFFERENT RECEPTORS TO INDUCE SCHWANN-CELL PROLIFERATION IN A CAMP-DEPENDENT PROCESS
Autore:
TZENG SF; DEIBLER GE; NEUBERGER TJ; DEVRIES GH;
Indirizzi:
EDWARD HINES JR VET ADM HOSP,BLDG 1,ROOM D400J,5TH AVE & ROOSEVELT RDHINES IL 60141 VIRGINIA COMMONWEALTH UNIV,MED COLL VIRGINIA,DEPT BIOCHEM & MOLEC BIOPHYS RICHMOND VA 23298 NIMH,CEREBRAL METAB LAB BETHESDA MD 20892 AMGEN INC BOULDER CO 00000
Titolo Testata:
Journal of neuroscience research
fascicolo: 6, volume: 42, anno: 1995,
pagine: 758 - 767
SICI:
0360-4012(1995)42:6<758:2MROMB>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
FIBROBLAST GROWTH-FACTORS; PERIPHERAL-NERVE; P53; DEGENERATION; GANGLIOSIDES; MACROPHAGES; LYMPHOCYTES; ASTROCYTES; RESPONSES; DOMAINS;
Keywords:
SCHWANN CELL PROLIFERATION; MYELIN BASIC PROTEIN; INTRACELLULAR CAMP; FGF RECEPTOR; GANGLIOSIDE GM1;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
S.F. Tzeng et al., "2 MITOGENIC REGIONS OF MYELIN BASIC-PROTEIN INTERACT WITH DIFFERENT RECEPTORS TO INDUCE SCHWANN-CELL PROLIFERATION IN A CAMP-DEPENDENT PROCESS", Journal of neuroscience research, 42(6), 1995, pp. 758-767

Abstract

Previous studies have shown that myelin basic protein (MBP) is mitogenic for Schwann cells (SCs) in the presence of elevated intracellular cAMP, Two mitogenic regions of MBP have been identified: one mitogenicregion within the first 44 residues of the amino-terminus (1-44) and the other mitogenic region within the terminal 15 residues of the carboxyl end of the molecule (152-167), Unlike the mitogenic effect of a myelin enriched fraction (MEF), the mitogenic effect of MBP was not reduced by the addition of the lysosomal inhibitor, ammonium chloride, These data indicate that MBP causes SC proliferation by direct interaction of MBP with a surface receptor. Using Scatchard analysis of the binding of MBP to SCs, we report that treatment with forskolin does not cause the upregulation of receptors for MBP, Moreover, MBP blocks the cross-linking of I-125-bFGF with two fibroblast growth factor (FGF) receptors having apparent molecular weights of 140 kDa and 120 kDa, respectively, Since neither TGF-beta nor PDGF-BB displaced cell surface bound I-125-MBP, we conclude that MBP binds to the FGF receptor rather than other growth factor receptors. Furthermore, only MBP(1-44) interacted with ganglioside GM1, whereas MBP(152-167) did not interact with this ganglioside, These results are consistent with the view that ganglioside GM1 mediates the mitogenic effects of MBP(1-44), while the FGF receptor mediates the mitogenic effect of MBP(152-167). Intracellular cAMP of SCs was transiently increased after the addition of macrophage conditioned medium, suggesting that macrophages may produce factors invivo which can transiently elevate intracellular cAMP levels, allowing a wave of SC proliferation in response to MBP-related mitogens. (C) 1995 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 22:50:41