• 제목/요약/키워드: Presenilin 2

검색결과 43건 처리시간 0.026초

INCREASE OF INTRACELLULAR $CA^{2+}$ AND CYTOTOXICITY INDUCED BY NEURO-TOXICANTS IN PC12 CELLS CARRYING MUTANT PRESENILIN-2

  • Shin, Im-Chul;Hwang, In-Young;Song, Youn-Sook;Park, Cheol-Beom;Oh, Ki-Wan;Lee, Myung-Koo;Kim, Young-Kyu;Hong, Jin-Tae
    • 한국독성학회:학술대회논문집
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    • 한국독성학회 2002년도 Current Trends in Toxicological Sciences
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    • pp.111-111
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    • 2002
  • Many cases of early onset autosomal dominant inherited forms of Alzheimer's disease (AD) are caused by mutation in the genes encoding presenilin-2 (PS-2) on chromosome 1. It is characterized by amyloid deposition and associated with loss of neuron. However, molecular mechanisms underlying the role of PS-2 mutation in the pathogenic AD are not known.(omitted)

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A Correspondence between Aging-related Reduction of Neprilysin and Elevation of Aβ-42 or γ-Secretase Activity in Transgenic Mice Expressing NSE-controlled APPsw or Human Mutant Presenilin-2

  • Lim Hwa-J.;Kim Yong-K.;Sheen Yhun-Y.
    • Biomolecules & Therapeutics
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    • 제14권2호
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    • pp.106-109
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    • 2006
  • Neprilysin (Nep) is known to be important to degrade $A{\beta}$ derived from amyloid precursor protein (APP) by cleavage with $\beta-and\;\gamma$-secretases. In order to determine whether a correspondence between $A{\beta}-42/{\gamma}-secretase$ activity and Nep levels exists in postnatal aging of transgenic mice expressing either neuron-specific enolase (NSE)-controlled human mutant presenilin-2 (hPS2m) or APPsw alone, the levels of Nep expression and $A{\beta}-42/{\gamma}-secretase$ activity were examined age of 5, 12, and 20 months, respectively. The levels of Nep expression in both types of transgenic brains were decreased relative to those of control mice in a aging-related manner, while the level of $A{\beta}-42/{\gamma}-secretase$ activity was reversibly increased. Thus, changes in $A{\beta}-42$ may all reflect variation in amounts of Nep enzyme.

Mutant Presenilin 2 Causes Abnormality in the Brain Lipid Profile in the Development of Alzheimer's Disease

  • Nguyen, Hong Nga;Son, Dong-Ju;Lee, Jae-Woong;Hwang, Dae-Youn;Kim, Young-Kyu;Cho, Jeong-Sik;Lee, Ung-Soo;Yoo, Hwan-Soo;Moon, Dong-Cheul;Oh, Ki-Wan;Hong, Jin-Tae
    • Archives of Pharmacal Research
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    • 제29권10호
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    • pp.884-889
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    • 2006
  • Mutation in the presenilin 2 (PS2mt) is known to be one of factors involved in the development of Alzheimer's disease (AD). It was recently revealed that an abnormality of lipid metabolism is a phenomenon occurring in AD. Therefore, the aim of this study was to investigate the potential relationship between the mutation of PS2 and alterations of the lipid profile within the brain. The results showed there increases in the levels of cholesterol, low density lipoprotein and triglyceride, but a decrease in the level of high density lipoprotein in brain tissues expressing mutant PS2. These findings indicated that PS2mt is involved in the abnormalities of the lipid profile, which could cause or result in the development of AD.

알츠하이머 질환 마우스에서 중첩주파수를 활용한 미세전류가 인지능력 개선에 미치는 효과 (Effect of Microcurrent Wave Superposition on Cognitive Improvement in Alzheimer's Disease Mice Model)

  • 김민정;이아영;조동식;조은주
    • 한국산학기술학회논문지
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    • 제20권5호
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    • pp.241-251
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    • 2019
  • 본 연구에서는 Alzheimer's disease(AD) 마우스 모델에서 미세전류의 적용을 통한 인지능력 개선 효과를 확인하였다. ICR 마우스에 amyloid beta($A{\beta}$)를 뇌 내 주입하여 인지능력 손상을 유도한 후, 4가지 파형의 미세전류를 각각 적용하여 손상된 인지능력에 미치는 미세전류의 영향을 검토하였다. AD 마우스의 공간 및 물체 인지능력을 확인하기 위해 행동실험을 실시한 결과, novel object recognition test와 Morris water maze test에서 $A{\beta}$로 인해 손상되었던 인지능력이 미세전류 적용군에서 유의적으로 개선됨을 확인하였으며, 지질과산화 반응으로 인한 malondialdehyde의 뇌 내 생성량 또한 감소하였다. 뇌 조직에서 AD 관련 단백질 발현을 측정한 결과, 특히 미세전류 Wave4 [STEP FORM 파형(0, 1.5, 3, 5V), 중첩Hz 적용] 적용군에서 $A{\beta}$ 생성 관련 단백질인 ${\beta}$-secretase, presenilin 1, presenilin 2의 발현이 감소하였고 신경영양인자인 brain-derived neurotrophic factor 단백질 발현이 증가하였다. 이 결과를 바탕으로 AD 마우스에서 미세전류를 이용한 손상된 인지능력에 대한 개선 효과를 확인하였으며, AD 예방 및 치료를 위한 비약물적인 방법으로서 적용할 수 있을 것으로 기대된다.

인삼산사복합방(人蔘山査複合方)이 Alzheimer성 치매 병태(病態) 생쥐의 뇌조직 손상에 미치는 효과 (Effects of Ginseng Radix plus Crataegi Fructus on the injury of brain tissue in the mice with Alzheimer's disease induced by ${\beta}$ amyloid peptide(${\beta}A$).)

  • 한신희;길기정
    • 대한본초학회지
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    • 제21권4호
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    • pp.123-131
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    • 2006
  • Objectives : This research was investigated the effect of the Ginseng Radix plus Crataegi Fructus on the injury of brain tissue in the mice with Alzheimer's disease induced by ${\beta}A$. Methods : Observed a change of the injury of brain tissue and reduced the infarction area of hippocampus in the mice with Alzheimer's disease induced by ${\beta}A$. Results : 1. The Gin-CF extract reduced the infarction area of hippocampus, and controlled the injury of brain tissue in the mice with Alzheimer's disease induced by ${\beta}A$. 2. The Gin-CF extract reduced the Tau protein, GFAP protein, and presenilin1/presenilin2 protein (immunohistochemistry) of hippocampus in the mice with Alzheimer's disease induced by ${\beta}A$. Conclusion : These results suggest that the Ginseng Radix plus Crataegi Fructus extract may be effective for the prevention and treatment of Alzheimer's disease. Investigation into the clinical use of the Ginseng Radix plus Crataegi Fructus extract for Alzheimer's disease is suggested for future research.

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트레드밀 운동이 mutant (N141I) presenilin-2 유전자를 이식한 알츠하이머질환 모델 생쥐 뇌의 Aβ-42, cytochrome c, SOD-1, 2와 Sirt-3 단백질 발현에 미치는 영향 (The Effects of Treadmill Exercise on Cognitive Performance, Brain Mitochondrial Aβ-42, Cytochrome c, SOD-1, 2 and Sirt-3 Protein Expression in Mutant (N141I) Presenilin-2 Transgenic Mice of Alzheimer's Disease)

  • 구정훈;엄현섭;강은범;권인수;염동철;안길영;오유성;백영수;조인호;조준용
    • 생명과학회지
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    • 제20권3호
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    • pp.444-452
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    • 2010
  • 본 연구의 목적은 PS-2 (N141I) 알츠하이머 형질전환 모델 생쥐를 대상으로 트레드밀 운동이 뇌의 세포질과 미토콘드리아의 $A{\beta}$-42, cytochrome c, SOD-1, 2 and Sirt-3 단백질 발현에 미치는 효과를 알아보는데 있다. 우선 알츠하이머 형질전환 생쥐를 Non-Tg-sedentary (n=5), Non-Tg-treadmill exercise (n=5) 집단과 Tg-sedentary (n=5), Tg-treadmill exercise (n=5) 집단으로 구분하고 트레드밀 운동을 통한 신경보호 효과를 검증하기 위해 Tg와 Non-Tg집단에 12주간 트레드밀 운동을 수행한 후 인지능력을 살펴보고 뇌의 세포질과 미토콘드리아의 $A{\beta}$-42, cytochrome c, anti-oxidant enzymes (SOD-1, SOD-2)와 Sirt-3 단백질을 분석하였다. 먼저 트레드밀운동은 Tg 집단에서 인지능력의 개선을 나타냈으며 미토콘드리아의 $A{\beta}$-42와 세포질의 cytochrome c 단백질의 감소와 항산화 효소인 SOD-1, SOD-2를 유의하게 증가시켰다. 게다가 트레드밀 운동은 모든 집단에서 Sirt-3 단백질의 발현을 증가시켰다. 따라서 트레드밀 운동은 인지능력의 향상과 세포 내 스트레스를 유발하는 $A{\beta}$-42를 억제시켜 알츠하이머 질환을 개선시킬 수 있는 효과적인 방법이라고 생각된다.