Developmental patterns of ganglioside sialosylation coincident with neuritogenesis in cultured embryonic chick brain neurons.

• Verfasst von: Rosenberg, Abraham [VerfasserIn]
• Verfasst von: Sauer, Anke [VerfasserIn]
• Verfasst von: Noble, Ernest P. [VerfasserIn]
• Verfasst von: Groß, Hans Jürgen [VerfasserIn]
• Verfasst von: Chang, Ruth [VerfasserIn]
• Verfasst von: Brossmer, Reinhard [VerfasserIn]
• Titel: Developmental patterns of ganglioside sialosylation coincident with neuritogenesis in cultured embryonic chick brain neurons.
• Verf.angabe: Abraham Rosenberg, Anke Sauer, Ernest P. Noble, Hans-Jürgen Gross, Ruth Chang, Reinhard Brossmer
• E-Jahr: 1992
• Jahr: 25 May 1992
• Umfang: 6 S.
• Fussnoten: Artikel-Version: 4. Januar 2021 ; Gesehen am 24.06.2024
• Titel Quelle: Enthalten in: The journal of biological chemistry
• Ort Quelle: Bethesda, Md. : ASBMB Publications, 1905
• Jahr Quelle: 1992
• Band/Heft Quelle: 267(1992), 15, Seite 10607-10612
• ISSN Quelle: 1083-351X
• DOI: doi:10.1016/S0021-9258(19)50060-6
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1892108380

Abstract

Chick brain precursor neurons were observed to introduce sialic acid biosynthetically into only three specific gangliosides: monosialosyl lactosyl ceramide (GM3), disialosyl lactosyl ceramide (GD3), and disialosyl gangliotrihexosyl ceramide (GD2), when sialic acid was labeled metabolically by its obligate precursor, [3H] ManNAc. Sialosyl donor CMP-[3H]NeuAc supplied in the culture medium gave rise uniquely to surface-labeled GD3. Thus sialosyl transferase/GD3 synthase activity is expressed both intraneuronally and in the neuronal exofacial surface. Upon epidermal growth factor-induced onset of neurite outgrowth, labeled complex sialosyl gangliotetrahexosyl ceramide species of gangliosides began to appear in the embryonic neuronal plasma membrane. However, intraneuronal and exofacial sialosyl transferase/GD3 synthase activities remained constant, with or without neurite outgrowth. Moreover, simpler species of gangliosides maintained a steady quantitative sialosyl level (1.6 +/- 0.2 micrograms of sialic acid/mg of protein), whereas more complex species completely absent before neurite outgrowth accrued and reached 4.8 +/- 0.9 micrograms of sialic acid/mg of protein with full neurite development. This analysis of developmental patterns of ganglioside sialosylation has provided evidence that stable neurite outgrowth depends upon generation by the neuron of special plasma membrane with a massive content of complex higher species of gangliosides.