Journal of Oriental Neuropsychiatry (동의신경정신과학회지)

The Korean Society of Oriental Neuropsychiatry (대한한방신경정신과학회)
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Inhibitory Effect of Inflammatory Cytokines Secretion from Brain Neuroglial Cells by RADIX ASPARAGI

천문동(天門冬)에 의한 뇌신경교세포(腦神經膠細胞)로부터 염증성(炎症性) 세포활성물질(細胞活性物質) 분비(分泌)의 억제(抑制) 효과(效果)

  • Kang Heong-Won (Dept. of Neuropsychiatry, College of Oriental Medicine, Won Kwang University) ;
  • Lyu Yeong-Su (Dept. of Neuropsychiatry, College of Oriental Medicine, Won Kwang University)
  • 강형원 (원광대학교 한의과대학 신경정신과학교실) ;
  • 류영수 (원광대학교 한의과대학 신경정신과학교실)
  • Published : 1998.08.30
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Abstract

Substantial evidence has accumulated that Alzheimer's disease is associated with a local inflammatory reaction in senile plaques which may be immunemediated, and includes extensive Brain Neuroglial invasion, lymphocytic infiltration, cytokine deposition. Tumor necrosis factor a (TNF-a) is a cytokine which plays an important immunoenhancing role in the local acute and chronic inflammatory response in response to a variety of stimuli. The neuropeptide, substance P, can stimulate secretion of TNF-a from Brain Neuroglial cells. Neuroglia have substance P receptors in the central nervous system. WQ investigated whether RADIX ASPARAGI inhibits secretion of TNF-a from primary cultures of Brain Neuroglial cells containing both astrocyte (∼90%) and microglia (∼10%). RADIX ASPARAGI dose-dependently inhibited the TNF-a secretion induced by substance P plus lipopolysaccharide (LPS). In cultures enriched for micoglia (>95% pure). LPS stimulated the secretion of TNF-a but substance P caused no enhancement. Because there was no synergism between substance P and LPS in the microglial cultures it is resonable to substance P madiated enhancement of TNF-a secretion. IL-1 is a modulator of TNF-a secretion in the immune system. Also IL-1 has been shown to elevate TNF- a secretion from LPS-stimulated Brain Neuroglial cells while having no effect on Brain Neuroglial cells in the absence of LPS. We therfore investigated whether IL-1 mediates the RADIX ASPARAGI inhibition of TNF-a secretion form primary Brain Neuroglial cells. Treatment of RADIX ASPARAGI to mixed cultures stimulated with both substance P and LPS decreased TNF-a secretion to the level observed with LPS alone. These results indicate that RADIX ASPARAGI possess strong antiinflammatory activity in the cental nervous system by inhibition of inflammatory cytokines secretion from Brain Neuroglial cells.

Keywords

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