Role of G-proteins in the effects of leptin on pedunculopontine nucleus neurons
The pedunculopontine nucleus (PPN), the cholinergic arm of the reticular activating system, regulates waking and rapid eye movement sleep. Here, we demonstrate immunohistochemical labeling of the leptin receptor signaling isoform in PPN neurons, and investigated the effects of G-protein modulation a...
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2013
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| LEADER | 14107caa a22014297a 4500 | ||
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| 001 | PAPER-24208 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518205601.0 | ||
| 008 | 190411s2013 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-84883740663 | |
| 024 | 7 | |2 cas |a Cyclic Nucleotide-Gated Cation Channels; GTP-Binding Proteins, 3.6.1.-; Leptin; Potassium Channels; Receptors, N-Methyl-D-Aspartate; Sodium Channels; hyperpolarization-activated cation channel | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 030 | |a JONRA | ||
| 100 | 1 | |a Beck, P. | |
| 245 | 1 | 0 | |a Role of G-proteins in the effects of leptin on pedunculopontine nucleus neurons |
| 260 | |c 2013 | ||
| 270 | 1 | 0 | |m Garcia-Rill, E.; Department of Neurobiology and Development Science, Center for Translational Neuroscience, University of Arkansas for Medical Sciences, 4301 West Markham St., Slot 847, Little Rock, AR 72205, United States; email: garciarilledgar@uams.edu |
| 506 | |2 openaire |e Política editorial | ||
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| 520 | 3 | |a The pedunculopontine nucleus (PPN), the cholinergic arm of the reticular activating system, regulates waking and rapid eye movement sleep. Here, we demonstrate immunohistochemical labeling of the leptin receptor signaling isoform in PPN neurons, and investigated the effects of G-protein modulation and the leptin triple antagonist (TA) on the action of leptin in the PPN. Whole-cell patch clamp recordings were performed in rat brainstem slices from 9 to 17 day old pups. Previous results showed that leptin caused a partial blockade of sodium (INa) and h-current (IH) in PPN neurons. TA (100 nM) reduced the blockade of INa (~ 50% reduction) and IH (~ 93% reduction) caused by leptin. Intracellular guanosine 5′-[β-thio]diphosphate trilithium salt (a G-protein inhibitor) significantly reduced the effect of leptin on INa(~ 60% reduction) but not on IH (~ 25% reduction). Intracellular GTPγS (a G-protein activator) reduced the effect of leptin on both INa (~ 80% reduction) and IH (~ 90% reduction). These results suggest that the effects of leptin on the intrinsic properties of PPN neurons are leptin receptor- and G-protein dependent. We also found that leptin enhanced NMDA receptor-mediated responses in single neurons and in the PPN population as a whole, an effect blocked by TA. These experiments further strengthen the association between leptin dysregulation and sleep disturbances. Beck et al. investigated the effects of leptin on the intrinsic properties of neurons from the pedunculopontine nucleus (PPN). Leptin reduced the amplitude of voltage-gated sodium (INa) and hyperpolarization-activated cyclic nucleotide-gated HCN (IH) channels. These effects were antagonized by a leptin receptor (OB-R) antagonist and by the G-protein antagonist GDPβ. Beck et al. investigated the effects of leptin on the intrinsic properties of neurons from the pedunculopontine nucleus (PPN). Leptin reduced the amplitude of voltage-gated sodium (INa) and hyperpolarization-activated cyclic nucleotide-gated HCN (IH) channels. These effects were antagonized by a leptin receptor (OB-R) antagonist and by the G-protein antagonist GDPβ. © 2013 International Society for Neurochemistry. |l eng | |
| 593 | |a Department of Neurobiology and Development Science, Center for Translational Neuroscience, University of Arkansas for Medical Sciences, 4301 West Markham St., Slot 847, Little Rock, AR 72205, United States | ||
| 593 | |a IFIBYNE, CONICET, University of Buenos Aires, Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a AROUSAL |
| 690 | 1 | 0 | |a GDPΒ, GTPΓS |
| 690 | 1 | 0 | |a HYPERPOLARIZATION-ACTIVATED CATION CURRENT |
| 690 | 1 | 0 | |a SODIUM CURRENT |
| 690 | 1 | 0 | |a GUANINE NUCLEOTIDE BINDING PROTEIN |
| 690 | 1 | 0 | |a LEPTIN |
| 690 | 1 | 0 | |a LEPTIN RECEPTOR |
| 690 | 1 | 0 | |a N METHYL DEXTRO ASPARTIC ACID RECEPTOR |
| 690 | 1 | 0 | |a PROTON PUMP |
| 690 | 1 | 0 | |a SODIUM CHANNEL |
| 690 | 1 | 0 | |a ANIMAL CELL |
| 690 | 1 | 0 | |a ANIMAL TISSUE |
| 690 | 1 | 0 | |a ARTICLE |
| 690 | 1 | 0 | |a BRAIN NERVE CELL |
| 690 | 1 | 0 | |a BRAIN SLICE |
| 690 | 1 | 0 | |a BRAIN STEM |
| 690 | 1 | 0 | |a CONTROLLED STUDY |
| 690 | 1 | 0 | |a FEMALE |
| 690 | 1 | 0 | |a MALE |
| 690 | 1 | 0 | |a NONHUMAN |
| 690 | 1 | 0 | |a PATCH CLAMP |
| 690 | 1 | 0 | |a PEDUNCULOPONTINE TEGMENTAL NUCLEUS |
| 690 | 1 | 0 | |a PRIORITY JOURNAL |
| 690 | 1 | 0 | |a PROTEIN FUNCTION |
| 690 | 1 | 0 | |a RAT |
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| 690 | 1 | 0 | |a GDPΒ, GTPΓS |
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| 690 | 1 | 0 | |a ANIMALS |
| 690 | 1 | 0 | |a CYCLIC NUCLEOTIDE-GATED CATION CHANNELS |
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| 690 | 1 | 0 | |a GTP-BINDING PROTEINS |
| 690 | 1 | 0 | |a IMMUNOHISTOCHEMISTRY |
| 690 | 1 | 0 | |a LEPTIN |
| 690 | 1 | 0 | |a MALE |
| 690 | 1 | 0 | |a MEMBRANE POTENTIALS |
| 690 | 1 | 0 | |a NEURONS |
| 690 | 1 | 0 | |a PATCH-CLAMP TECHNIQUES |
| 690 | 1 | 0 | |a PEDUNCULOPONTINE TEGMENTAL NUCLEUS |
| 690 | 1 | 0 | |a POPULATION |
| 690 | 1 | 0 | |a POTASSIUM CHANNELS |
| 690 | 1 | 0 | |a RATS |
| 690 | 1 | 0 | |a RATS, SPRAGUE-DAWLEY |
| 690 | 1 | 0 | |a RECEPTORS, N-METHYL-D-ASPARTATE |
| 690 | 1 | 0 | |a SODIUM CHANNELS |
| 690 | 1 | 0 | |a RATTUS |
| 700 | 1 | |a Mahaffey, S. | |
| 700 | 1 | |a Urbano, F.J. | |
| 700 | 1 | |a Garcia-Rill, E. | |
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