NDLI: Mechanism of S100b Release from Rat Cortical Slices Determined Under Basal and Stimulated Conditions

Content Provider	Springer Nature Link
Author	Gürsoy, Murat Levent Büyükuysal, R.
Copyright Year	2009
Abstract	Incubation of rat cortical slices in a medium that was not containing oxygen and glucose (oxygen–glucose deprivation, OGD) caused a 200% increase in the release of S100B. However, when slices were transferred to a medium containing oxygen and glucose (reoxygenation conditions, or REO), S100B release reached 500% of its control value. Neither inhibition of nitric oxide (NO) synthase by L-NAME nor addition of the NO donors sodium nitroprussid (SNP) or hydroxylamine (HA) to the medium altered basal S100B release. Similarly, the presence of SNP, HA or NO precursor l-arginine in the medium, or inhibition of NO synthase by L-NAME also failed to alter OGD- and REO-induced S100B outputs. Moreover, individual inhibition of PKC, PLA$_{2}$ or PLC all failed to attenuate the S100B release determined under control condition or enhanced by either OGD or REO. Blockade of calcium channels with verapamil, chelating the Ca$^{+2}$ ions with BAPTA or blockade of sodium channels with tetrodotoxin (TTX) did not alter OGD- and REO-induced S100B release. In contrast to the pharmacologic manipulations mentioned above, glutamate and α-ketoglutarate added at high concentrations to the medium prevented both OGD- and REO-induced S100B outputs. These results indicate that neither NO nor the activation of PKC, PLA$_{2}$ or PLC seem to be involved in basal or OGD- and REO-induced S100B outputs. Additionally, calcium and sodium currents that are sensitive to verapamil and TTX, respectively, are unlikely to contribute to the enhanced S100B release observed under these conditions.
Starting Page	429
Ending Page	436
Page Count	8
File Format	PDF
ISSN	03643190
Journal	Neurochemical Research
Volume Number	35
Issue Number	3
e-ISSN	15736903
Language	English
Publisher	Springer US
Publisher Date	2009-10-13
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	S100B release Oxygen–glucose deprivation (OGD) Re-oxygenation Neurology Biochemistry Neurosciences
Content Type	Text
Resource Type	Article
Subject	Medicine Biochemistry Cellular and Molecular Neuroscience

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