Affordable Access

Intraneuronal guanylyl-imidodiphosphate injection mimics long-term synaptic hyperpolarization in Aplysia.

Publication Date
  • Research Article
  • Chemistry


The phosphodiesterase (3':5'-cyclic AMP 5'-nucleotidohydrolase, EC inhibitor thepohylline enhances both the amplitude and duration of a long-lasting synaptic hyperpolarization in identified neuron R15 in Aplysia californica. Intraneuronal injection into R15 of glanylyl-imidodiphosphate, an adenylate cyclase [ATP pyrophosphate-lyase (cyclizing), EC] activator, results in a deep and long-lasting hyperpolarization of the cell, similar to that produced by synaptic stimulation. Biochemical analysis confirms that guanylyl-imidodiphosphate activates adenylate cyclase in Aplysia californica nervous tissue, without affecting phosphodiesterase activity. These observations suggest that adenosine 3':5'-cyclic monophosphate plays a role in long-lasting synaptic inhibition and are consistent with a post-synaptic site of action for adenosine 3':5'-cyclic monophosphate.

There are no comments yet on this publication. Be the first to share your thoughts.