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Chem. Senses 27: 803-810, 2002
© Oxford University Press 2002

Aggregation of F-Actin in Olfactory Glomeruli: a Common Feature of Glomeruli Across Phyla

Wolfgang Rössler, Josko Kuduz, Friedrich W. Schürmann and Detlev Schild

Physiologisches Institut, Universität Göttingen, Humboldtallee 23, 37073 Göttingen, Germany

Correspondence to be sent to (current address): Wolfgang Rössler, Biozentrum der Universität, Zoologie II, Am Hubland, 97074 Würzburg, Germany. e-mail: roessler{at}biozentrum.uni-wuerzburg.de

Using fluorophore-conjugated phalloidin, we show that filamentous (F)-actin is strongly aggregated in olfactory glomeruli within primary olfactory centers of vertebrates and insects. Our comparative study demonstrates that aggregation of F-actin is a common feature of glomeruli across phyla, and is independent of glomerular architecture and/or the presence or absence of cellular borders around glomeruli formed by neurons or glial cells. The distribution of F-actin in axonal and dendritic compartments within glomeruli, however, appears different between vertebrates and insects. The potential role of the actin-based cytoskeleton in synaptic and structural plasticity within glomeruli is discussed.


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