強化されたERK活動は,シナプス可塑性を増やすことによってケタミン抗うつ効果を拡張する.
Z Zack Ma1,2, Natalie J Guzikowski1,2, Ji-Woon Kim1,2
1Department of Pharmacology, Vanderbilt University, Nashville, TN, USA.
まとめ
ケタミンの維持
科学分野:
- 神経科学
- 薬理学について
- 分子精神医学
背景:
- 繰り返されたケタミン療法は迅速な抗うつ効果をもたらすが,副作用を引き起こすため,単一投与から持続的な作用のための戦略が必要である.
- ケタミンの抗うつ作用は,重要な神経経路であるCA3-CA1シナプスのシナプス強化に関連しています.
研究 の 目的:
- ケタミンの抗うつ効果を細胞内シグナル伝達経路を標的として延長する方法を調査する.
- ケタミンの持続効果を媒介する二重特異性リン酸酶6 (DUSP6) と細胞外シグナル調節キナーゼ (ERK) の役割を調査する.
主な方法:
- ケタミンの投与後にERKの活性を増強するために,DUSP6の薬理学的抑制.
- CA3-CA1シナプスのシナプス増強の評価
- 動物モデルにおける抗うつ剤のような行動効果の評価.
- 興奮神経細胞におけるトロポミオシン受容体キナーゼB (TrkB) の選択的消去により,その役割が決定される.
主要な成果:
- DUSP6を阻害すると,CA3- CA1シナプスのケタミン誘発シナプス強化が増加した.
- ケタミンの抗うつ剤のような行動効果を最大2ヶ月間延長した.
- シナプスおよび行動上の結果に対するDUSP6抑制の効果は,刺激性ニューロンにおけるTrkBシグナル伝達に依存していた.
結論:
- DUSP6抑制による細胞外信号調節キナーゼ (ERK) 活性が一時的に増加すると,ケタミンの抗うつ効果が持続する.
- 下流の細胞内信号伝達,特にTrkBに依存する経路をターゲットにすることで,ケタミンの治療効果を延ばすための有望な戦略を提供します.
- このアプローチは,単回投与のケタミンによる持続的な抗うつ作用の臨床的必要性を解決します.
さらに関連する動画
05:42Elevated Plus Maze Test Combined with Video Tracking Software to Investigate the Anxiolytic Effect of Exogenous Ketogenic Supplements
Published on: January 7, 2019
30.7K
09:51Recording Synaptic Plasticity in Acute Hippocampal Slices Maintained in a Small-volume Recycling-, Perfusion-, and Submersion-type Chamber System
Published on: January 1, 2018
11.5K
関連する概念動画
Electroconvulsive Therapy
18
Electroconvulsive therapy (ECT), or shock therapy, remains a critical biomedical intervention for severe, treatment-resistant depression. While its origins can be traced back to Hippocrates' observations that malaria-induced convulsions alleviated mental illness, modern ECT has evolved significantly from its earlier, more primitive applications. First introduced in 1938 by Ugo Cerletti and his colleagues, ECT involves inducing controlled seizures using electrical currents. In its early...
18
Antidepressant Drugs: MAOIs and Other Agents
164
Atypical antidepressants, including bupropion (Wellbutrin), mirtazapine (Remeron), nefazodone (Serzone), trazodone (Desyrel), and vilazodone (Viibryd), offer unique mechanisms of action. Bupropion weakly inhibits dopamine and norepinephrine reuptake, aiding depression treatment and smoking cessation, with a low risk of sexual dysfunction. Mirtazapine enhances serotonin and norepinephrine neurotransmission, leading to sedation, increased appetite, and weight gain. As a result, it helps treat...
164
Drugs Affecting Neurotransmitter Release or Uptake
876
Certain drugs can affect how neurotransmitters called catecholamines, are released or taken back up in the adrenergic neuron. They can have different effects on the body's sympathetic transmission. Reserpine, a natural compound found in the Rauwolfia shrub, blocks a transporter called vesicular monoamine transporter (VMAT), which leads to a buildup of catecholamines in the cell and reduces sympathetic transmission. Another drug called guanethidine works in multiple ways, including blocking...
876
Antiepileptic Drugs: Potassium Channel Activators
127
Ezocgabine or retigabine, an antiepileptic drug of remarkable efficacy, has revolutionized the management of seizures. It is a potassium channel activator, explicitly targeting the family of Q subtype potassium channels. It enhances the transmembrane potassium currents, regulating neuronal excitability. This action stabilizes the resting membrane potential, a pivotal factor in mitigating the hyperexcitability that characterizes epilepsy.
Ezogabine has gained approval as an adjunctive treatment...
Ezogabine has gained approval as an adjunctive treatment...
127
Sedatives and Hypnotics Drugs: Miscellaneous Agents
129
Sedatives and hypnotics encompass a wide range of substances, each with its unique mechanism of action, uses, and potential adverse effects.
Melatonin congeners like ramelteon (Rozerem) and tasimelteon (Hetlioz) selectively bind to melatonin receptors (MT1 and MT2) and thus mimic the actions of melatonin, a hormone that regulates sleep-wake cycles. Tasimelteon is primarily used for non-24-hour sleep-wake disorder, common in blind patients. They are also used to treat conditions like insomnia...
Melatonin congeners like ramelteon (Rozerem) and tasimelteon (Hetlioz) selectively bind to melatonin receptors (MT1 and MT2) and thus mimic the actions of melatonin, a hormone that regulates sleep-wake cycles. Tasimelteon is primarily used for non-24-hour sleep-wake disorder, common in blind patients. They are also used to treat conditions like insomnia...
129
Long-term Depression
30.4K
Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
30.4K
