Crossref journal-article
American Physiological Society
Journal of Neurophysiology (24)
Abstract

Long-term depression (LTD) of synaptic transmission can be induced by several mechanisms, one thought to involve Ca2+-dependent activation of postsynaptic nitric oxide (NO) synthase and subsequent diffusion of NO to the presynaptic terminal. We used the stable NO donor S-nitroso- N-acetylpenicillamine (SNAP) to study the NO-dependent form of LTD at Schaffer collateral-CA1 synapses in vitro. SNAP (100 μM) enhanced the induction of LTD via a cascade that was blocked by the N-methyl-d-aspartate receptor antagonist d-2-amino-5-phosphonopentanoic acid (50 μM), NO guanylyl cyclase inhibitor 1H-[1,2,4] oxadiazolo [4,3-a] quinoxalin-1-one (10 μM), and the PKG inhibitor KT5823 (1 μM). We further show that LTD induced by low-frequency stimulation in the absence of SNAP also is blocked by KT5823 or Rp-8-(4-chlorophenylthio)-guanosine 3′,5′-cyclic monophosphorothioate (10 μM), cyclic guanosine 3′,5′ monophosphate-dependent protein kinase (PKG) inhibitors with different mechanisms of action. Furthermore SNAP-facilitated LTD was blocked when release from intracellular calcium stores was inhibited by ryanodine (10 μM). Finally, two cell-permeant antagonists of the cyclic ADP-ribose binding site on ryanodine receptors also were able to block the induction of LTD. These results support a cascade for induction of homosynaptic, NO-dependent LTD involving activation of guanylyl cyclase, production of guanosine 3′,5′ cyclic monophosphate and subsequent PKG activation. This process has an additional requirement for release of Ca2+from ryanodine-sensitive stores, perhaps dependent on the second-messenger cyclic ADP ribose.

Bibliography

Reyes-Harde, M., Potter, B. V. L., Galione, A., & Stanton, P. K. (1999). Induction of Hippocampal LTD Requires Nitric-Oxide-Stimulated PKG Activity and Ca2+Release From Cyclic ADP-Ribose-Sensitive Stores. Journal of Neurophysiology, 82(3), 1569–1576.

Authors 4
  1. Magali Reyes-Harde (first)
  2. Barry V. L. Potter (additional)
  3. Antony Galione (additional)
  4. Patric K. Stanton (additional)
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Dates
Type When
Created 7 years, 8 months ago (Dec. 25, 2017, 12:29 a.m.)
Deposited 2 months ago (June 29, 2025, 1:41 a.m.)
Indexed 2 months ago (June 29, 2025, 2:10 a.m.)
Issued 25 years, 11 months ago (Sept. 1, 1999)
Published 25 years, 11 months ago (Sept. 1, 1999)
Published Print 25 years, 11 months ago (Sept. 1, 1999)
Funders 0

None

@article{Reyes_Harde_1999, title={Induction of Hippocampal LTD Requires Nitric-Oxide-Stimulated PKG Activity and Ca2+Release From Cyclic ADP-Ribose-Sensitive Stores}, volume={82}, ISSN={1522-1598}, url={http://dx.doi.org/10.1152/jn.1999.82.3.1569}, DOI={10.1152/jn.1999.82.3.1569}, number={3}, journal={Journal of Neurophysiology}, publisher={American Physiological Society}, author={Reyes-Harde, Magali and Potter, Barry V. L. and Galione, Antony and Stanton, Patric K.}, year={1999}, month=sep, pages={1569–1576} }