Abstract
In neuronal dendrites, septins localize to the base of the spine, a unique position which is sandwiched between the microtubule (MT)-rich dendritic shaft and the actin filament-rich spine. Here, we provide evidence for the association of SEPT6 with MTs in cultured rat hippocampal neurons. In normal cultures, SEPT6 clusters localized to MTs, but not to actin clusters. Only MT-disrupting agents (vincristine and nocodazole), but not microfilament-disrupting one (latrunculin A), induced the redistribution of SEPT6 to the disrupted MTs. The nascent MT fibers that were recovered from vincristine or nocodazole treatments also accompanied SEPT6. Blocking MT disruption by Taxol prevented such phenomena, proving that the redistribution of SEPT6 was due to the MT disruption. Our results indicate that SEPT6 complexes at the base of the dendritic spine are associated with MTs.
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Abbreviations
- DIV:
-
Days in vitro
- IR:
-
Immunoreactivity
- MT:
-
Microtubule
- PBS:
-
Phosphate-buffered saline
- RT:
-
Room temperature
- SEPT:
-
Septin
References
Allen C, Borisy GG (1974) Structural polarity and directional growth of microtubules of Chlamydomonas flagella. J Mol Biol 90:381–402
Allison DW, Chervin AS, Gelfand VI, Craig AM (2000) Postsynaptic scaffolds of excitatory and inhibitory synapses in hippocampal neurons: maintenance of core components independent of actin filaments and microtubules. J Neurosci 20:4545–4554
Ashby MC, Maier SR, Nishimune A, Henley JM (2006) Lateral diffusion drives constitutive exchange of AMPA receptors at dendritic spines and is regulated by spine morphology. J Neurosci 26:7046–7055
Brewer GJ, Torricelli JR, Evege EK, Price PJ (1993) Optimized survival of hippocampal neurons in B27-supplemented Neurobasal, a new serum-free medium combination. J Neurosci Res 35:567–576
Byers B, Goetsch L (1976) A highly ordered ring of membrane-associated filaments in budding yeast. J Cell Biol 69:717–721
Caudron F, Barral Y (2009) Septins and the lateral compartmentalization of eukaryotic membranes. Dev Cell 16:493–506
Cho SJ, Lee H, Dutta S, Song J, Walikonis R, Moon IS (2011) Septin 6 regulates the cytoarchitecture of neurons through localization at dendritic branch points and bases of protrusions. Mol Cells 32:89–98
De Brabander M, De May J, Joniau M, Geuens G (1977) Ultrastructural immunocytochemical distribution of tubulin in cultured cells treated with microtubule inhibitors. Cell Biol Int Rep 1:177–183
Douglas LM, Alvarez FJ, McCreary C, Konopka JB (2005) Septin function in yeast model systems and pathogenic fungi. Eukaryot Cell 4:1503–1512
Fiala JC, Feinberg M, Popov V, Harris KM (1998) Synaptogenesis via dendritic filopodia in developing hippocampal area CA1. J Neurosci 18:8900–8911
Field CM, Kellogg D (1999) Septins: cytoskeletal polymers or signalling GTPases? Trends Cell Biol 9:387–394
Gladfelter AS, Pringle JR, Lew DJ (2001) The septin cortex at the yeast mother-bud neck. Curr Opin Microbiol 4:681–689
Goslin K, Assmussen H, Banker G (1998) Rat hippocampal neurons in low density culture. In: Banker G, Goslin K (eds) Culturing nerve cells, 2nd edn. MIT Press, Cambridge, pp 339–370
Gu J, Firestein BL, Zheng JQ (2008) Microtubules in dendritic spine development. J Neurosci 28:12120–12124
Hartwell LH (1971) Genetic control of the cell division cycle in yeast. IV. Genes controlling bud emergence and cytokinesis. Exp Cell Res 69:265–276
Hu X, Viesselmann C, Nam S, Merriam E, Dent EW (2008) Activity-dependent dynamic microtubule invasion of dendritic spines. J Neurosci 28:13094–13105
Jaworski J, Hoogenraad CC, Akhmanova A (2008) Microtubule plus-end tracking proteins in differentiated mammalian cells. Int J Biochem Cell Biol 40:619–637
Kinoshita M (2006) Diversity of septin scaffolds. Curr Opin Cell Biol 18:54–60
Landis DM, Reese TS (1983) Cytoplasmic organization in cerebellar dendritic spines. J Cell Biol 97:1169–1178
Li X, Serwanski DR, Miralles CP, Nagata K, De Blas AL (2009) Septin 11 is present in GABAergic synapses and plays a functional role in the cytoarchitecture of neurons and GABAergic synaptic connectivity. J Biol Chem 284:17253–17265
Longtine MS, Bi E (2003) Regulation of septin organization and function in yeast. Trends Cell Biol 13:403–409
Longtine MS, DeMarini DJ, Valencik ML, Al-Awar OS, Fares H, De Virgilio C, Pringle JR (1996) The septins: roles in cytokinesis and other processes. Curr Opin Cell Biol 8:106–119
Matus A, Ackermann M, Pehling G, Byers HR, Fujiwara K (1982) High actin concentrations in brain dendritic spines and postsynaptic densities. Proc Natl Acad Sci USA 79:7590–7594
Moon IS, Cho SJ, Jin I, Walikonis R (2007) A simple method for combined fluorescence in situ hybridization and immunocytochemistry. Mol Cells 24:76–82
Oh Y, Bi E (2011) Septin structure and function in yeast and beyond. Trends Cell Biol 21:141–148
Spector I, Shochet NR, Kashman Y, Groweiss A (1983) Latrunculins: novel marine toxins that disrupt microfilament organization in cultured cells. Science 219:493–495
Tada T, Sheng M (2006) Molecular mechanisms of dendritic spine morphogenesis. Curr Opin Neurobiol 16:95–101
Tada T, Simonetta A, Batterton M, Kinoshita M, Edbauer D, Sheng M (2007) Role of septin cytoskeleton in spine morphogenesis and dendrite development in neurons. Curr Biol 17:1752–1758
Weber K, Bibring T, Osborn M (1975) Specific visualization of tubulin-containing structures in tissue culture cells by immunofluorescence. Cytoplasmic microtubules, vinblastine-induced paracrystals, and mitotic figures. Exp Cell Res 95:111–120
Xie Y, Vessey JP, Konecna A, Dahm R, Macchi P, Kiebler MA (2007) The GTP-binding protein Septin 7 is critical for dendrite branching and dendritic-spine morphology. Curr Biol 17:1746–1751
Ziv NE, Smith SJ (1996) Evidence for a role of dendritic filopodia in synaptogenesis and spine formation. Neuron 17:91–102
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This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011-0002668).
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Moon, I.S., Lee, H. & Walikonis, R.S. Septin 6 localizes to microtubules in neuronal dendrites. Cytotechnology 65, 179–186 (2013). https://doi.org/10.1007/s10616-012-9477-7
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DOI: https://doi.org/10.1007/s10616-012-9477-7