Nitric Oxide Regulates Activity-Dependent Neuroprotective Protein (ADNP) in the Dentate Gyrus of the Rodent Model of Kainic Acid-Induced Seizure

作者：Cosgrave Anna S; McKay Jennifer S; Morris Richard; Quinn John P; Thippeswamy Thimmasettappa^*

来源：Journal of Molecular Neuroscience, 2009, 39(1-2): 9-21.

DOI：10.1007/s12031-008-9169-0

• NOS blockers
• cGMP
• sGC blocker
• Hilar neurons
• Dentate granule cells

The dentate gyrus (DG) of the normal rat brain contains activity-dependent neuroprotective protein (ADNP) which is widely distributed in the cytoplasm of neurons and astrocytes. Treatment with nitric oxide (NO) synthase (NOS) inhibitor N(G)-nitro-l-arginine methyl ester (l-NAME) caused a decrease in ADNP expression in granule cells which persisted 3 days post-treatment. However, treatment with neuronal-specific NOS inhibitor, 7-nitroindazole (7-NI), or soluble guanylyl cyclase inhibitor, ODQ, did not change ADNP expression in the DG. We have previously shown that kainic acid (KA)-induced seizure increases neuronal NOS in neurons and inducible NOS in glia cells and suppresses ADNP in the hippocampus (Cosgrave et al., Neurobiol Dis 30(3):281-292, 2008). In the DG, l-NAME treatment prior to KA causes ADNP synthesis in granule cells by 3 h which was later restricted to the subgranular zone by 3 days. 7-NI and ODQ had no effect. Double immunostaining for neuronal marker NeuN and ADNP revealed a significant decrease of both ADNP( ) neurons and of total neuron numbers (NeuN( )) in the hilus of animals having KA-induced seizure that had been pretreated with l-NAME implying that NO and ADNP may act together to protect hilar neurons. Overall, these observations suggest that NO regulates ADNP in the DG under both basal and pathophysiological conditions.

• 出版日期2009-9