Abstract:
BACKGROUND:The Na+,K+-ATPase plays an important role for ion homeostasis in virtually all mammalian cells, including neurons. Despite this, there is as yet little known about the isoform specific distribution in neurons. RESULTS:With help of superresolving stimulated emission depletion microscopy the spatial distribution of Na+,K+-ATPase in dendritic spines of cultured striatum neurons have been dissected. The found compartmentalized distribution provides a strong evidence for the confinement of neuronal Na+,K+-ATPase (α3 isoform) in the postsynaptic region of the spine. CONCLUSIONS:A compartmentalized distribution may have implications for the generation of local sodium gradients within the spine and for the structural and functional interaction between the sodium pump and other synaptic proteins. Superresolution microscopy has thus opened up a new perspective to elucidate the nature of the physiological function, regulation and signaling role of Na+,K+-ATPase from its topological distribution in dendritic spines.
journal_name
BMC Neuroscijournal_title
BMC neuroscienceauthors
Blom H,Rönnlund D,Scott L,Spicarova Z,Widengren J,Bondar A,Aperia A,Brismar Hdoi
10.1186/1471-2202-12-16subject
Has Abstractpub_date
2011-01-27 00:00:00pages
16issn
1471-2202pii
1471-2202-12-16journal_volume
12pub_type
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