6 research outputs found
μ΄νΈλ¦¬μ λ°λ§μ μν (Ti,W)(CN)-Ni λλ Έ κ³ μ©μ²΄ λΆλ§ μ μ‘° λ° μκ²° νΉμ±
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Όλ¬Έ(μμ¬)--μμΈλνκ΅ λνμ :μ¬λ£κ³΅νλΆ,2006.Maste
μλ λ΄λΉ νμ΅μ κ³Όμ μ€ νΌν¨μ§ μΈν¬μμ λ°μνλ λ΄μ¬μ κ°μμ±μ μν
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Όλ¬Έ (λ°μ¬)-- μμΈλνκ΅ λνμ : μμ°κ³Όνλν λμΈμ§κ³Όνκ³Ό, 2019. 2. κΉμμ .Intrinsic plasticity of cerebellar Purkinje cells (PCs) is recently highlighted in the cerebellar local circuits, however, its physiological impact on the cerebellar learning and memory remains elusive. Knocking out one of endoplasmic reticulum membrane-bounded protein, which is stromal interaction molecule type 1 (STIM1), in PC-specific manner causes interesting behavior phenotype. These mice showed normal acquisition of memory, but a day after, they lost almost all memory. Since this memory consolidation deficit was found in every learning paradigm, I suspect that the deficit is based on a common pathway among cerebellar learning circuit. Intriguing results from electrophysiological recording were that these mice showed normal synaptic plasticity but no intrinsic plasticity in the PCs. Through the electrophysiological recordings after gain-up training of the VOR, I found that this learning protocol induces a decrease of both synaptic weight and intrinsic excitability in PCs. The synaptic plasticity was found in both the wild-type and knockout groups. However, intrinsic plasticity was impaired only in the knockout mice. Furthermore, the observed defects in the intrinsic plasticity of PCs led to the formation of improper neural plasticity in the vestibular nucleus (VN) neurons. These results suggest that the synergistic modulation of intrinsic and synaptic plasticity in PCs is required for the changes in the local connectivity between the cerebellum and VN that contribute to the long-term storage of motor memory.μλ νΌν¨μ§ μΈν¬μμ λ°μνλ λ΄μ¬μ κ°μμ±(intrinsic plasticity)μ κ·Όλμ κ·Έ λ°©ν₯μ±μ΄ λ°νμ§λ©°, μλ μ κ²½νλ‘μμμ κ·Έ μν μ λν κΆκΈμ¦μ΄ λ§μμ‘λ€. μ μ μ μ‘°μμ ν΅ν΄μ μν¬μ²΄(endoplasmic reticulum)μ λ§λ¨λ°±μ§ μ€μ νλμΈ STIM1 (Stromal interaction molecule type 1)μ νΌν¨μ§ μΈν¬μμλ§ νΉλ³νκ² μ κ±°ν μμ₯μμλ μμ£Ό ν₯λ―Έλ‘μ΄ νλ νννμ νμΈ ν μ μμλ€. μ΄ μμ₯λ μ μ μꡬλ°μ¬ (Vestibulo-ocular reflexVOR) νλ ¨μ νμμ λ, νμ΅μ μ νμ§λ§ κΈ°μ΅μ κ³΅κ³ ν (consolidation) κ³Όμ μ λ¬Έμ κ° μμ΄ μ₯κΈ° κΈ°μ΅μ κ²°νμ λ°κ²¬ν μ μμλ€. μ΄λ¬ν νμμ λͺ¨λ νμ΅ λ°©λ²μμλ νμΈ ν μ μμκΈ° λλ¬Έμ, μ΄λ₯Ό λ΄λΉνλ μ κ²½νλ‘μμ 곡ν΅μ μΌλ‘ μ§λκ°μΌνλ λΆλΆμ λ¬Έμ κ° μμ κ²μ΄λΌ μΆμΈ‘νμκ³ , κ·Έ λμμ νΌν¨μ§ μΈν¬μ λ΄μ¬μ ν₯λΆμ±μΌλ‘ μ νμλ€. ν₯λ―Έλ‘μ΄ μ μ μ΄ μμ₯μ νΌν¨μ§ μΈν¬μμ μλ
μ€ κ°μμ±(synaptic plasticity)μ μ μμ΄μ§λ§, λ΄μ¬μ κ°μμ±μ κ²°ν λμ΄μμλ€λ μ μ΄λ€. μ μ μꡬλ°μ¬ νλ ¨μ μνν μμ₯μ λ μ νΈμ λ§λ€μ΄ μ κΈ°μ리νμ κΈ°λ‘μ ν΄λ³Έ κ²°κ³Ό, μ μμ₯μ STIM1μ΄ μ κ±°λ μ₯ λͺ¨λμμ νΌν¨μ§ μΈν¬μ μλ
μ€ κ°μμ±μ λ°κ²¬λμμ§λ§, λ΄μ¬μ κ°μμ±μ μ μμ₯μμλ§ λ°κ²¬λμλ€. λν, μ μμ₯μ νΌν¨μ§ μΈν¬μμ λ°μν κ°μμ±μ νΌν¨μ§ μΈν¬μ μ νΈλ₯Ό λ°λ μ μ ν΅ (Vestibular nucleusVN)μμμ μλ
μ€, λ΄μ¬μ κ°μμ±μ λ°μμν€λλ‘ μ λνμμ§λ§, STIM1μ΄ μ κ±°λ μ₯λ μ μ ν΅μμ λ°μνλ κ°μμ± λν λ§κ°μ Έ μμλ€. μ΄λ¬ν κ²°κ³Όλ₯Ό ν΅ν΄ νΌν¨μ§ μΈν¬μμ λ°μνλ λ΄μ¬μ κ°μμ±μ΄ μ μ ν΅μμ λ°μνλ κ°μμ±μ μ€μνκ² μμ©νμ¬ μ₯κΈ°κΈ°μ΅μ μν κΈ°μ΅μ κ³΅κ³ ν κ³Όμ μ νμν μμμμ νμΈ ν μ μμλ€.Abstract iv
Preface v
1. Introduction 1
1.1 Previously suggested hypotheses 2
1.2 Plasticity in VOR circuit 5
2. Results 8
2.1 Behavior test in STIM1PKO mice 8
2.1.1 Consolidation deficit was found in STIM1PKO mice 8
2.1.2 The Consolidation deficit may occur between 1 to 4 hrs after learning 14
2.2 ex vivo recordings from PCs after VOR learning 15
2.2.1 Learning generally induces PF-PC synaptic plasticity in both groups 15
2.2.2 Learning induced intrinsic plasticity showes relevance in memory consolidation 20
2.3 Computational analysis of AP properties in PCs 27
2.4 ex vivo recordings from VN neurons after VOR learning 28
3. Discussion 37
4. Materials and Methods 43
5. References 50
Abstract in Korean (κ΅λ¬Έμ΄λ‘) 59
κ°μ¬μ κΈ 60Docto