Neurochemical Research

, Volume 34, Issue 11, pp 1962–1968 | Cite as

Regulation of [3H] d-Aspartate Release from Mammalian Isolated Retinae by Hydrogen Sulfide

  • Catherine A. Opere
  • Emmanuel M. Monjok
  • Kaustubh H. Kulkarni
  • Ya Fatou Njie
  • Sunny E. Ohia
Original Paper


Hydrogen sulfide (H2S), can produce pharmacological effects on neural and non-neural tissues from several mammalian species. The present study investigates the pharmacological action of H2S, (using sodium hydrosulfide, NaHS, and/or sodium sulfide, Na2S as donors) on amino acid neurotransmission (using [3H] d-aspartate as a marker for glutamate) from isolated, superfused bovine and porcine retinae. Isolated neural retinae were incubated in Krebs solution containing [3H] d-aspartate at 37°C. Release of [3H] d-aspartate was elicited by high potassium (K+ 50 mM) pulse. Both NaHS and Na2S donors caused an inhibition of K+-evoked [3H] d-aspartate release from isolated bovine retinae without affecting basal [3H] d-aspartate efflux yielding IC50 values of 0.006 and 6 μm, respectively. Furthermore, NaHS inhibited depolarization-evoked release of [3H] d-aspartate from isolated porcine retinae with an IC50 value of 8 μM. The inhibitory action of NaHS on [3H] d-aspartate release from porcine retinae was blocked by propargyglycine, a selective inhibitor of cystathionine γ-lyase (CSE). Our results indicate that H2S donors can inhibit amino acid neurotransmission from both isolated bovine and porcine retinae, an effect that is dependent, at least in part, on intramural biosynthesis of H2S.


Hydrogen sulfide [3H] d-aspartate Retina Neurotransmission 



We acknowledge the expert secretarial assistance of Ms. Carolyn Wahl (University of Houston) in the preparation of this manuscript.


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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Catherine A. Opere
    • 1
  • Emmanuel M. Monjok
    • 2
  • Kaustubh H. Kulkarni
    • 2
  • Ya Fatou Njie
    • 3
  • Sunny E. Ohia
    • 3
  1. 1.Department of Pharmacy Sciences, School of Pharmacy and Health ProfessionsCreighton UniversityOmahaUSA
  2. 2.Department of Pharmacological and Pharmaceutical Sciences, College of PharmacyUniversity of HoustonHoustonUSA
  3. 3.Department of Pharmaceutical Sciences, College of Pharmacy and Health SciencesTexas Southern UniversityHoustonUSA

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