Improvement of Learning Behavior of Mice by an Antiacetylcholinesterase and Neuroprotective Agent NX42, a Laminariales-Alga Extract

Acetylcholinesterase 억제 및 신경세포 보호 활성을 갖는 다시마목 해조 추출물 NX42의 마우스 학습능력 향상 효과

  • Lee, Bong-Ho (Laboratory of Aging and Degenerative Diseases, Hanbat National University) ;
  • Stein, Steven M. (Department of Medicine, University of Washington)
  • Published : 2004.12.31

Abstract

Brown-alga-derived natural agent NX42, mainly composed of algal polysaccharides and phlorotannins, showed mild but dose-dependent inhibition of acetylcholinesterase with $IC_{50}=600-700\;{\mu}g/mL$. Phlorotannin-rich fraction of NX42 showed substantial increase of the activity by more than one order of magnitude ($IC_{50}=54\;{\mu}g/mL$) and significant protection of SK-N-SH cells from oxidative stress by $H_2O_2$. Learning trials of mice for 5 consecutive days revealed electric-shock treatment during learning period significantly retarded learning process, whereas NX42-treated mice showed significant resistance against leaning deficiency possibly mainly due to anticholinesterase and neuroprotective activities of phlorotannin.

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