摘要
目的探讨急性和重复性心理应激对大鼠某些细胞免疫功能的影响。方法将60只Sprague-dawley(SD)大鼠随机分为6组,每组10只,3个应激组分别接受为期1、14和28 d束缚应激(6 h/d),相应的3个对照组不接受任何应激处理。分别测定大鼠在应激和非应激状态下脾自然杀伤(NK)细胞活力和T淋巴细胞增殖活力。结果反复应激束缚14和28 d组大鼠的脾质量[14 d:(623.75±62.10)mg vs(985.98±127.79)mg,28 d:(672.50±49.82)mg vs(1 055.75±94.96)mg]、脾指数[14 d:(0.20±0.01)vs(0.27±0.02),28 d:(0.19±0.01)vs(0.27±0.02)]、胸腺质量[14 d:(319.88±76.30)mg vs(512.25±106.06)mg,28 d:(312.75±48.00)mg vs(488.13±34.56)mg]及胸腺指数[14d:(0.10±0.02)vs(0.15±0.03),28 d:(0.09±0.01)vs(0.13±0.02)]均低于相应的对照组大鼠,同时,反复应激组大鼠的脾脏T淋巴细胞增殖功能[(14 d时ConA5 mg/L:(57 587.75±9 958.97)cpm vs(154 919.88±4 961.22)cpm,14 d时ConA2.5 mg/L:(52 323.50±530.71)cpm vs(102 047.63±3 329.69)cpm;28 d时ConA5.0 mg/L:(52 350.00±2 500.89)cpm vs(153 460.88±11 971.49)cpm,28 d时ConA2.5 mg/L:(42 322.38±403.85)cpm vs(100 068.63±11 326.51)cpm]及脾脏NK细胞的活力也低于相应的对照组大鼠;而急性应激束缚1 d组大鼠的各项指标与对照组相比无明显差异。结论反复应激刺激对大鼠的某些细胞免疫功能具有抑制效应。
Objective To explore the effect of acute and repeated psychological stress on certain cellular immune function in rats. Methods 60 SD rats were randomly divided into 6 groups, each consisting of 10 rats. The rats in three stress groups were subjected to either a single day or 14, 28 days of restraint (6 h/d), and those in the corresponding control groups were transferred to the testing room without any treatment. Spleen natural killer cell activity and T-lymphocyte proliferation of acutely stressed and unstressed rats were measured. Results The results showed that the spleen weight[ 14 d:(623.75 ± 62. 10)mg vs (985.98 ± 127.79 )rag, 28 d: (672. 50 ± 49. 82)mg vs ( 1 055.75 ± 94. 96)mg], spleen index [ 14 d: (0. 20 ± 0. 01 ) vs (0. 27 ±0. 02), 28 d: (0. 19 ±0. 01) vs (0.27 ± 0.02) ], thymus gland weight[ 14 d: (319. 88 ± 76. 30) mg vs (512.25 ± 106.06) mg,28 d: (312. 75 ±48. 00)mg vs (488. 13 ±34. 56) mg] and thymus gland index[ 14 d: (0. 10 ±0.02) vs (0. 15 ±0. 03) ,28 d : (0. 09 ± 0.01 ) vs (0. 13 ± 0. 02 ) ] in the repeated stress group were lower than those of their corresponding control groups. The results also showed that repeated stress could cause a significant impairments of T-lymphocyte proliferation[ ConA 5.0 mg/L for 14 d: (57 587.75 ± 9 958.97) cpm vs ( 154 919. 88 ±4 961.22) cpm, ConA 2. 5 mg/L for 14 d: ( 52 323. 50 ± 530. 71 ) cpm vs ( 102 047.63 ± 3 329. 69) cpm; ConA 5 mg/L for 28 d : (52 350. 00 ± 2 500. 89 ) cep vs ( 153 460. 88 ± 11 971.49 ) cpm, ConA 2.5 mg/L for 28 d : (42 322. 38 ± 403. 85 ) cep vs ( 100 068. 63 ± 11 326.51 ) cpm ] and spleen natural killer cell activities when compared with their corresponding control groups. Condusion Repeated psychological stress could be associated with the cellular immune suppression.
出处
《中国职业医学》
CAS
北大核心
2009年第1期11-13,17,共4页
China Occupational Medicine
关键词
大鼠
心理应激
细胞免疫功能
Rat
Psychological stress
Cellular immune function