FMP Publications

Our publications are recorded in a searchable database since 2010, updates will be added regularly.

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Cannabinoid Type 2 Receptors Mediate a Cell Type-Specific Plasticity in the Hippocampus
Stempel(*), A. V., Stumpf(*), A., Zhang(*), H. Y., Ozdogan(*), T., Pannasch(*), U., Theis(*), A. K., Otte(*), D. M., Wojtalla(*), A., Racz(*), I., Ponomarenko, A., Xi(*), Z. X., Zimmer(*), A.; Schmitz(*), D.
Neuron, 90:795-809

Tags: Behavioral Neurodynamics (Korotkova/Ponomarenko)

Abstract: Endocannabinoids (eCBs) exert major control over neuronal activity by activating cannabinoid receptors (CBRs). The functionality of the eCB system is primarily ascribed to the well-documented retrograde activation of presynaptic CB1Rs. We find that action potential-driven eCB release leads to a long-lasting membrane potential hyperpolarization in hippocampal principal cells that is independent of CB1Rs. The hyperpolarization, which is specific to CA3 and CA2 pyramidal cells (PCs), depends on the activation of neuronal CB2Rs, as shown by a combined pharmacogenetic and immunohistochemical approach. Upon activation, they modulate the activity of the sodium-bicarbonate co-transporter, leading to a hyperpolarization of the neuron. CB2R activation occurred in a purely self-regulatory manner, robustly altered the input/output function of CA3 PCs, and modulated gamma oscillations in vivo. To conclude, we describe a cell type-specific plasticity mechanism in the hippocampus that provides evidence for the neuronal expression of CB2Rs and emphasizes their importance in basic neuronal transmission.

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Leibniz-Forschungsinstitut für Molekulare Pharmakologie im Forschungsverbund Berlin e.V. (FMP)
Campus Berlin-Buch
Robert-Roessle-Str. 10
13125 Berlin, Germany
+4930 94793 - 100 
+4930 94793 - 109 (Fax)

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