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FFECT OF EXCITATOXICITY ON Ca2+/CaM PK II ACTIVITY IN RAT HIPPOCAMPAL SLICES
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- Author:
- No author available
- Journal Title:
- ACTA PHARMACEUTICA SINICA
- Issue:
- 8
- DOI:
- 10.3321/j.issn:0513-4870.1998.08.001
- Key Word:
- 大鼠海马脑片;兴奋毒性;钙/钙调素依赖性蛋白激酶II
Abstract： 用离体孵育的大鼠海马脑片模型,研究兴奋毒性与Ca2+/CaM PK II活性的关系.结果表明,外源性谷氨酸或NMDA均可抑制Ca2+/CaM PK II的活性,此活性的抑制可被MK801完全拮抗,而DNQX却无明显拮抗作用;无胞外Ca2+时,谷氨酸导致的酶活性抑制程度不如有胞外Ca2+时显著;无胞外Mg2+时,谷氨酸导致的酶活性抑制程度比有胞外Mg2+时显著.结果提示兴奋毒性对Ca2+/CaM PK II活性的抑制与NMDA受体介导的兴奋毒性有关.
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