scholarly journals An interchangeable role for kainate and metabotropic glutamate receptors in the induction of rat hippocampal mossy fiber long‐term potentiation in vivo

Hippocampus ◽  
2015 ◽  
Vol 25 (11) ◽  
pp. 1407-1417 ◽  
Author(s):  
James L. Wallis ◽  
Mark W. Irvine ◽  
David E. Jane ◽  
David Lodge ◽  
Graham L. Collingridge ◽  
...  
Keyword(s):  
Glutamate Receptors ◽  
Metabotropic Glutamate Receptors ◽  
Mossy Fiber ◽  
Long Term Potentiation ◽  
Metabotropic Glutamate ◽  
Term Potentiation

scholarly journals Metabotropic Glutamate Receptor Antagonist AIDA Blocks Induction of Mossy Fiber-CA3 LTP In Vivo

2005 ◽  
Vol 93 (5) ◽  
pp. 2668-2673 ◽  
Author(s):  
Kenira J. Thompson ◽  
Mario L. Mata ◽  
James E. Orfila ◽  
Edwin J. Barea-Rodriguez ◽  
Joe L. Martinez
Keyword(s):  
Mossy Fiber ◽  
Long Term Potentiation ◽  
Initial Slope ◽  
Maximal Response ◽  
Excitatory Postsynaptic Potential ◽  
Sprague Dawley ◽  
Metabotropic Glutamate ◽  
Term Potentiation

Metabotropic glutamate receptors (mGluR) are implicated in long-term memory storage. mGluR-I and mGluR-II antagonists impede various forms of learning and long-term potentiation (LTP) in animals. Despite the evidence linking mGluR to learning mechanisms, their role in mossy fiber-CA3 long-term potentiation (LTP) is not yet clear. To explain the involvement of mGluR-I in memory mechanisms, we examined the function of the mGluR-I antagonist 1-aminoindan-1, 5-dicarboxylic acid (AIDA) on the induction of mossy fiber-CA3 LTP in vivo in male Sprague Dawley and Fischer 344 (F344) rats. Acute extracellular mossy fiber (MF) responses were evoked by stimulation of the MF bundle and recorded in the stratum lucidum of CA3. The excitatory postsynaptic potential (EPSP) magnitude was measured by using the initial slope of the field EPSP slope measured 2–3 ms after response onset. After collection of baseline MF-CA3 responses at 0.05 Hz, animals received either ((±))-3-(2-carboxypiperazin-4-yl)-propyl-1-phosphonic acid ( N-methyl-d-aspartate-R antagonist, 10 mg/kg ip), naloxone (opioid-R antagonist, 10 mg/kg ip), or AIDA (mGluR antagonist, 1 mg/kg ip or 37.5 nmol ic). LTP was induced by two 100-Hz trains at the intensity sufficient to evoke 50% of the maximal response. Responses were collected for an additional 1 h. AIDA blocked induction of LTP in the mossy fiber pathway ( P < 0.05) in both strains of rats after systemic and in Sprague Dawley rats after intrahippocampal injection.

A molecular switch activated by metabotropic glutamate receptors regulates induction of long-term potentiation

Nature ◽  
1994 ◽  
Vol 368 (6473) ◽  
pp. 740-743 ◽  
Author(s):  
Z. A. Bortolotto ◽  
Z. I. Bashir ◽  
C. H. Davies ◽  
G. L. Collingridge
Keyword(s):  
Glutamate Receptors ◽  
Metabotropic Glutamate Receptors ◽  
Long Term Potentiation ◽  
Molecular Switch ◽  
Metabotropic Glutamate ◽  
Term Potentiation
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