Gangliosides stimulate bradykinin B2 receptors to promote calmodulin kinase II-mediated neuronal differentiation

Journal of Biochemistry
Yoshinori KanatsuHideyoshi Higashi

Abstract

Gangliosides mediate neuronal differentiation and maturation and are indispensable for the maintenance of brain function and survival. As part of our ongoing efforts to understand signaling pathways related to ganglioside function, we recently demonstrated that neuronal cells react to exogenous gangliosides GT1b and GD1b. Both of these gangliosides are enriched in the synapse-forming area of the brain and induce Ca(2+) release from intracellular stores, activation of Ca(2+)/calmodulin-dependent protein kinase II (CaMKII) and activation of cdc42 to promote reorganization of cytoskeletal actin and dendritic differentiation. Here, we show that bradykinin B2 receptors transduce these reactions as a mediator for ganglioside glycan signals. The B2 antagonist Hoe140 inhibited ganglioside-induced CaMKII activation, actin reorganization and early development of axon- and dendrite-like processes of primary cultured hippocampal neurons. Furthermore, we confirmed by yeast reporter assay that major b-series gangliosides, GT1b, GD1b and GD3, stimulated B2 bradykinin receptors. We hypothesize that this B2 receptor-mediated ganglioside signal transduction pathway is one mechanism that modulates neuronal differentiation and maturation.

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Citations

Mar 14, 2012·Biochemical and Biophysical Research Communications·Ayaka ShimazakiHideyoshi Higashi
Aug 6, 2015·Cytometry. Part a : the Journal of the International Society for Analytical Cytology·Isis C NascimentoHenning Ulrich
Sep 16, 2015·The Journal of Reproduction and Development·Seon-Ung HwangSang-Hwan Hyun
May 6, 2015·Trends in Biochemical Sciences·Cara-Lynne Schengrund

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