文章摘要
刘朝晖,陈景藻,李康樗,曹云新.不同声压级次声对大鼠海马细胞凋亡的影响[J].中华物理医学与康复杂志,2004,(3):
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不同声压级次声对大鼠海马细胞凋亡的影响
  
DOI:
中文关键词: 次声  细胞凋亡  海马  大鼠
英文关键词: Infrasound  Apoptosis  Hippocampus  Rat
基金项目:全军医学科学技术研究“十五”计划指令性课题(No.01L071)
作者单位
刘朝晖,陈景藻,李康樗,曹云新 710032西安第四军医大学放射医学教研室(刘朝晖、陈景藻、李康樗)免疫学教研室(曹云新) 
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中文摘要:
      目的探讨8Hz,90dB/130dB次声作用对海马细胞凋亡的影响。 方法将雄性SD大鼠88只随机分为11个组,即对照组、90 dB次声作用1 d组、7 d组、14 d组、21 d组及28 d组,130 dB次声作用1 d组、7 d组、14 d组、21 d组及28 d组,每组8只。采用细胞分离技术、荧光染色和流式细胞仪观察大鼠脑海马细胞凋亡率。 结果与对照组比较,90 dB/1 d组、130 dB/1 d组、130 dB/7 d组次声作用后,海马细胞未显示凋亡率增高(P>0.05);90 dB/7 d组、90 dB/14 d组、90 dB/21 d组、130 dB/14 d组、130 dB/21 d组次声作用后,海马细胞凋亡率显著增高(P<0.01,P<0.05),90 dB/21 d组比90 dB/14 d组明显回落(P<0.01),但仍高于对照组(P<0.05),90 dB/14 d组海马细胞凋亡率达到高峰(P<0.01),90 dB/28 d组及130 dB/28 d组与对照组相比,差异无显著性意义(P>0.05)。 结论8 Hz,90 dB/130 dB次声作用一定时间后,均可导致海马细胞凋亡数量显著增高,尤以90 dB/14 d组效应最强;8 Hz,90 dB/130 dB次声作用对大鼠海马细胞具有损伤效应。随作用时间延长,海马细胞对8 Hz,90 dB/130 dB次声作用均可产生适应性。
英文摘要:
      Objective To study the effect of infrasound on apoptosis of hippocampal cells. MethodsEighty-eight male SD rats were randomized into eleven groups: control group, 90dB/1d,7d,14d, 21d and 28d infrasound exposure groups;130dB/1d, 7d, 14d, 21d and 28d infrasound exposure groups. Infrasonic exposure groups were put into an infrasound field with 8Hz, 90dB or 130dB, each day for 2h. Acute cell separation and flow cytometer (FCM) techniques were used for measurement of apoptosis ratio in hippocampal cells. ResultsCompared with the control group, no increase of apoptosis ratio was recorded in 90dB/1d, 130dB/1d and 130dB/7d infrasound exposure groups(P>0.05),but there are increases of that in 90dB/7d (P<0.01), 90dB/14d (P<0.01), 90dB/21d (P<0.05), 130dB/14d (P<0.01) and 130dB/21d (P<0.05) infrasound exposure groups, reaching the peak level in 90dB/14d group (P<0.01 vs all the others), restoring in 90dB/28d and 130dB/28d infrasound exposure groups (P>0.05). ConclusionThe results showed that 8Hz, 90dB/130dB infrasound definitely induced increases of apoptosis ratio in the hippocampus cells after certain time of exposure, suggesting that there are damages occurred by infrasound field with 90dB or 130dB and some adaptation of the hippocampal cells ensued after a certain period of time.
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