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右美托咪定对失血性休克大鼠多器官损伤的影响

Effects of dexmedetomidine on multiple organ injury induced by hemorrhagic shock in rats
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摘要 目的 研究右美托咪定(Dexmedetomidine, DEX)对失血性休克(hemorrhagic shock,HS)大鼠多器官损伤的影响。方法 健康雄性SD大鼠24只,随机分为三组:生理盐水对照组(NS组)、失血性休克模型组(HS组)、右美托咪定治疗组(HS+D组),每组大鼠8只。NS组股静脉给予5 mL/kg生理盐水;HS组建立失血性休克模型;HS+D组复苏前0.5 h腹腔注射右美托咪定100 μg/kg。右颈总动脉置入套管针,连接换能器监测实验期间平均动脉压(MAP)。复苏后 6 h 放血,处死动物,检测血清肿瘤坏死因子-ɑ(TNF-α)、白细胞介素-6(IL-6)、白细胞介素-8(IL-8)和氧化亚氮(NO)浓度。检测血氧分压(PaO2)及谷丙转氨酶(ALT)、谷草转氨酶(AST)、尿素氮(BUN)及血肌酐(Cr)浓度,取部分肺、肝、肾组织,检测髓过氧化物酶(MPO)活性。HE染色观察肺、肝、肾组织病理学改变。结果 与NS组TNF-α(pg/mL)、IL-6(pg/mL)、IL-8(pg/mL)、NO(μmol/L)(178.87±36.23、368.12±46.96、198.42±46.28、36.45±8.04)比较,HS组血清中TNF-α、IL-6、IL-8、NO(1216.96±97.36、2686.68±178.651、998.01±101.42、546.73±106.22)浓度升高(P〈0.01);与HS组比较,HS+D组TNF-α、IL-6、IL-8、NO (428.5465.48、1656.31±121.57、468.19±88.31、387.34±87.15) 浓度降低(P〈0.01)。与NS组PaO2(112±11)mm Hg及ALT(U/L)、AST(U/L)、BUN(μmol/L)、Cr(μmol/L)(62.0±10.2、82.3±11.5、7.38±0.89、42.8±8.2)分别比较,HS组PaO2(81±7)降低,ALT、AST、BUN、Cr(195.2±17.8、203.0±10.3、18.21±1.72、63.9±7.1) 浓度升高;与HS组比较,HS+D组PaO2(95±13)mm Hg升高(P〈0.01),ALT、AST、BUN、Cr (126.6±11.3、109.4±12.2、10.63±4.78、49.8±6.4)浓度降低(P〈0.01)。与NS组肺、肝、肾组织MPO活性(U/g,1.2±0.2、2.5±0.4、1.9±1.7)比较,HS组肺、肝、肾组织MPO活性(5.3±0.6、16.7±1.8、9.2±1.1)升高(P〈0.01);与HS组比较,HS+D组肺、肝、肾组织MPO活性(3.8±0.4、12.8±1.2、6.8±0.8)降低(P〈0.01)。与NS组比较,HS组肺、肝、肾组织有明显的病理学损伤;与HS组比较,HS+D组肺、肝、肾组织病理学损伤减轻。结论 右美托咪定能减轻失血性休克大鼠肺、肝、肾损伤,其机制与抑制炎性反应有关。 Objective To investigate effects of dexmedetomidine on hemorrhagic shock (HS) induced multiple organ injury in rats. Methods Male Sprague - Dawley (SD) rats were randomly divided into three groups ( n = 8 ) : normal saline control group ( NS group ) ; hemorrhage shock group (HS group) ; HS + dexmedetomidine group (HS + D group). NS group was given saline (5 mL/kg, iv) alone, HS group received hemorrhage and resuscitation; HS + D group was given dexmedetomidine (100 μg/kg, ip) thirty minutes before resuscitation; the arterial catheter was placed in the right carotid artery and then was connected to a pressure transducer for the measurement of mean arterial pressure (MAP). Hemorrhage was performed by withdrawing blood into a heparinized syringe (0. 025 mL/g) over 10 minutes to lower MAP to 40 mm Hg to 50 mm Hg, MAP was maintained constantly by further blood drawing or reinfusion as needed for 60 minutes. Then, resuscitation was performed by reinfusing the remaining shed blood supplemented with normal saline (2 times the maximum blood volume drawn) over 10 minutes. The animals were sacrificed at 8 h after resuscitation and arterial blood samples were drawn for the measurement of tumor necrosis factor - α (TNF - α), interleukin - 6 ( IL - 6), interleukin - 8 ( IL - 8) , nitric oxide (NO), PaO2, ALT, AST, BUN and Cr. The lung, liver and kidney of all rats were removed for evaluation myeloperxidase (MPO) activity and histological characteristics. Results Compared with NS group, HS resulted in the increase of TNF-α, IL-6, IL-8, NO [ (1216.96 ± 97.36) pg/mL, (2686.68 ± 178.65) pg/mL, (998.01 ± 101.42) pg/mL, (546.73 ± 106.22) μmo/mL] in serum, while these parameters [ (428.54 ±65.48) pg/mL, ( 1656.31 ± 121.57) pg/mL, (468.19 ±88.31) pg/mL, (387.34 ± 87.15) μmol/L] in HS + D group was lower than that in HS group (P 〈 0.01 ). Compared with NS group, HS resulted in the decrease of PaO2 (81 ± 7 mm Hg) and the increase of ALT, AST, BUN, Cr [ (1216.96 ±97.36) U/L, (2686.68 + 178.65) U/L, (998.01 ± 101.42) μmol/L, (546.73 ±106.22) μmol/L] concentration, while PaO2 [ (95 ± 13) mm Hg] in HS + D group was higher than that in HS group and the ALT, AST, BUN, Cr [(126.6 ± 11.3) U/L, (109.4 + 12.2) U/L, (10.63 ±4.78) μmol/L, (49.8 ±6.4) μmol/L] concentration in HS group were lower than those in NS group (P 〈 0.01 ). The MPO activity [ (5.3 ± 0.6) U/g, ( 16.7 ± 1.8 ) U/g, (9.2 ± 1.1 ) U/g] of lung, liver, kidney tissue in HS group were higher than those in NS group, while these parameters [ (3.8 ±0.4) U/g, (12.8 ±1.2) U/g, (6.8 ±0.8) U/g] in HS + D group were lower than those in HS group (P 〈 0.01 ). Compared with NS group, HS induced marked lung, liver, kidney histological injury, which were less pronounced in HS + D group. Conclusion Dexmedetomidine attenuates lung, liver, kidney injury induced by hemorrhagic shock in rats.
作者 夏明珠 姜远旭 戴中亮 李亚丽 Xia Ming-zhu;Jiang Yuan-xu;Dai Zhong-liang;Li Ya-li(Hubei Community Health Service Center,Luohu Hospital Group,Shenzhen 518020,China)
出处 《中国急救医学》 CAS CSCD 北大核心 2018年第8期676-680,I0004,共6页 Chinese Journal of Critical Care Medicine
基金 深圳市科技研发基金(JCYJ20160422142317026)
关键词 细胞因子 右美托咪定(DEX) 失血性休克(Hs) 多器官损伤 Cytokine Dexmedetomidine ( DEX ) Hemorrhagic shock ( HS ) Multipleorgan injury
作者简介 夏明珠(1978-),女,主管护师,E—mail:xiamingzhu2010@126.com。;通信作者:李亚丽(1970-),女,硕士,主任医师,E—mail:13613051840@163.com。
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