The Effects of Polygala Tenuifolia DM Fraction on CT105-injuried Neuronal Cells

원지 디클로로메탄분획이 CT105에 의한 신경세포 상해에 미치는 영향

  • Lee Sang Won (Department of Oriental Neuropsychiatry Medicine, College of Oriental Medicine, Wonkwang University) ;
  • Kim Sang Ho (Department of Oriental Neuropsychiatry Medicine, College of Oriental Medicine, Wonkwang University) ;
  • Kim Tae Heon (Department of Oriental Neuropsychiatry Medicine, College of Oriental Medicine, Wonkwang University) ;
  • Kang Hyung Won (Department of Oriental Neuropsychiatry Medicine, College of Oriental Medicine, Wonkwang University) ;
  • Lyu Yeoung Su (Department of Oriental Neuropsychiatry Medicine, College of Oriental Medicine, Wonkwang University)
  • 이상원 (원광대학교 한의과 대학 한방신경정신과 교실) ;
  • 김상호 (원광대학교 한의과 대학 한방신경정신과 교실) ;
  • 김태헌 (원광대학교 한의과 대학 한방신경정신과 교실) ;
  • 강형원 (원광대학교 한의과 대학 한방신경정신과 교실) ;
  • 류영수 (원광대학교 한의과 대학 한방신경정신과 교실)
  • Published : 2004.04.01

Abstract

Alzheimer's disease(AD) is a geriatric dementia that is widespread in old age. In the near future AD will be the commom disease in public health service. Although a variety of oriental presciptions in study POD(Polygala tenuifolia extracted from dichlorometan) have been traditionally utilized for the treatment of AD, their pharmacological effects and action mechanisms have not yet fully elucidated. It has been widely believed that AP peptide divided from APP causes apoptotic neurotoxicity in AD brain. However, recent evidence suggests that CT105, carboxy terminal 105 aminoacids peptide fragment of APP, may be an important factor causing neurotoxicity in AD. SK-N-SH cells expressed with CT105 exhibited remarkable apoptotic cell damage. Based on morphological observations by phase contrast microscope and NO formation in the culture media, the CT105-induced cell death was significantly inhibited by POD. In addition, AD is one of brain degeneration disease. So We studied on herbal medicine that have a relation of brain degeneration. From old times, In Oriental Medicine, PO water extract has been used for disease in relation to brain degeneration. We were examined by ROS formation, neurite outgrowth assay and DPPH scravage assay. Additionally, we investigated the association between the CT105 and neurite degeneration caused by CT105-induced apoptotic response in neurone cells. We studied on the regeneratory and inhibitory effects of anti-Alzheimer disease in pCT105-induced neuroblastoma cell lines by POD. Findings from our experiments have shown that POD inhibits the synthesis or activities of CT105, which has neurotoxityies and apoptotic activities in cell line. In addition, treatment of POD(>50 ㎍/㎖ for 12 hours) partially prevented CT(105)-induced cytotoxicity in SK-N-SH cell lines, and were inhibited by the treatment with its. POD(>50 ㎍/㎖ for 12 hours) repaired CT105-induced neurite outgrowth when SK-N-SH cell lines was transfected with CT105. As the result of this study, In POD group, the apoptosis in the nervous system is inhibited, the repair against the degerneration of Neuroblastoma cells by CT105 expression is promoted. Decrease of memory induced by injection of scopolamin into rat was also attenuted by POD, based on passive avoidance test. Taken together, POD exhibited inhibition of CT105-induced apoptotic cell death. POD was found to reduce the activity of AchE and induced about the CA1 in rat hippocampus. Base on these findings, POD may be beneficial for the treatment of AD.

Keywords

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