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Conjugated Quantum Dots Allow for the Co-Localization of Endogenous Proteins in Submicroscopic Structures of the Rat Cerebellum

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Abstract:

GABA and glutamate are known as the principal inhibitory and excitatory neurotransmitters in the vertebrate central nervous system, respectively. However, recent electro-physiological and immunogold literature data indicate that GABA may undergo also an excitatory action on presynaptic varicosities of parallel fibers (PFs) in the molecular layer of the rat cerebellum. PFs are axonal extensions, with a cross section of about 0.1 μm, of the glutamatergic granule cells. Such an unexpected excitatory action of GABA indicates clearly the presence of GABA receptors in the PFs of granule cells. We show in this study that quantum dots may be used specifically and efficiently to label two endogenous synaptic proteins, namely R-GABAA-α1 receptors (GABAA Rs) and glutamate transporters (VGLUT1) in order to target their localization in very small structures such as the presynaptic varicosities of the PFs.

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2012.4922

Publication date: June 1, 2012

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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