title: Bombycis corpus extract (BCE) protects hippocampal neurons against excitatory amino acid-induced neurotoxicity.
abstract: Bombycis corpus (BC) or Bombyx Batryticatus, a batryticated silkworm and white-stiff silkworm, is a drug consisting of the dried larva of silkworm, Mobyz mori L., dead and stiffened due to the infection of Beauveria (Bals.) Vuill. In a previous paper (Kim et al., Pharmacol. Res., 43, 12-16, 2001), BC was shown to protect amyloid-beta-induced cytotoxicity. In the present study, we have found that BCE can prevent or reduce the neurotoxic actions in the hippocampus of the glutamate agonists N-methyl-D-aspartic acid (NMDA) in vitro or alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) and kainic acid in vitro. Pre-treatment with BCE (0, 1, 2, 5, and 10 microg/ml for 6-8 h) protected primary hippocampal cultures from embryonic day 18 (E18) embryos against NMDA-induced toxicity (0.1, 1, 10, and 50 nM/ml). BCE added either with NMDA (1 mM) or 1 h later had lesser, but still significant, protective actions. BCE also reduced NMDA-induced toxicity (1 mM). BCE (10 microg/ml) protected cultured neurons against the neurotoxic actions of either AMPA (25 microM) or kainic acid (1 mM) as well. Because the release of glutamate has been implicated in the neural damage after cerebral ischemia and other neural insults, these results suggest that BCE may contribute significantly to protect human brain to such damage.
authors.affiliation: National Research Laboratory for Glycobiology, MOST and Department of Biochemistry and Neurobiology, College of Oriental Medicine, Dongguk University, Kyungju City, Kyungbuk, Korea.
authors.forename: Byung-Soo
authors.initials: BS
authors.lastname: Koo
authors.forename: Hyun-Guk
authors.initials: HG
authors.lastname: An
authors.forename: Sung-Kwon
authors.initials: SK
authors.lastname: Moon
authors.forename: Young-Choon
authors.initials: YC
authors.lastname: Lee
authors.forename: Hyung-Min
authors.initials: HM
authors.lastname: Kim
authors.forename: Jeong-Heon
authors.initials: JH
authors.lastname: Ko
authors.forename: Cheorl-Ho
authors.initials: CH
authors.lastname: Kim
mesh_terms: D000818:Animals; D012831:Bombyx; D002452:Cell Count; D002470:Cell Survival / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D018690:Excitatory Amino Acid Agonists / Q000633:toxicity*; D006624:Hippocampus / Q000166:cytology / Q000187:drug effects* / Q000196:embryology; D007608:Kainic Acid / Q000633:toxicity; D008518:Medicine, East Asian Traditional; D016202:N-Methylaspartate / Q000633:toxicity*; D009474:Neurons / Q000166:cytology / Q000187:drug effects; D018696:Neuroprotective Agents / Q000008:administration & dosage / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D014020:Tissue Extracts / Q000008:administration & dosage / Q000494:pharmacology*
chemical_list: D018690:Excitatory Amino Acid Agonists; D018696:Neuroprotective Agents; D014020:Tissue Extracts; D016202:N-Methylaspartate; D007608:Kainic Acid