亲缘单倍体相合外周血造血干细胞移植治疗重症再生障碍性贫血

【摘要】目的探讨改良白消安／环磷酰胺＋抗胸腺细胞球蛋白（Bu／Cy＋ATG）预处理方案在亲缘单倍体造血干细胞移植治疗重症再生障碍性贫血（SAA）临床应用中的有效性和安全性。方法回顾分析河北唐山钢铁集团有限责任公司医院血液肿瘤科自2009年10月至2011年5月间采用亲缘单倍体外周血干细胞移植治疗的3例SAA患者资料。供者均为母亲,1例HLA3／6位点相合,2例HLA4／6位点相合。预处理方案均为改良Bu／Cy＋ATG,具体为白消安0．8m∥kg,每天4次,连用2d;环磷酰胺50mg·kg-1·d-1,连用4d;抗胸腺细胞球蛋白2．5mg·kg-1·d-1,连用4d。环孢素＋短程甲氨蝶呤＋吗替麦考酚酯预防排斥反应。结果3例患者均达完全供者植入,2例合并Ⅱ-Ⅲ度急性移植物抗宿主病（GVHD）,1例患者合并局限型慢性GVHD。3例患者均发生血CMV感染,经抗病毒治疗均得以控制。随访5～25个月,3例患者至今均无病存活。结论初步经验Bu／Cy＋ATG预处理方案经改良用于亲缘单倍体外周血造血干细胞移植治疗SAA安全、有效。     

七氟烷预处理对大鼠在体心肌抗氧化的影响

目的探讨七氟烷预处理对大鼠心肌抗氧化作用。方法 50只健康雄性SD大鼠分为5组：假手术组（C组）、缺血再灌注组（I/R组）、1%、2%、3%七氟烷预处理组（S1组、S2组、S3组）,每组10只,建立大鼠在体心肌缺血再灌注模型。测定再灌注3h后血清MDA、SOD和CK-MB含量。结果 S1、S2、S3组的MDA、CK-MB积明显低于I/P组,且S2组的MDA和CK-MB的水平低于S1、S3组,SOD水平明显高于I/P组（P〈0.01）。结论在心肌缺血再灌注损伤中,七氟烷对心肌的具有保护作用,且浓度为2%的七氟烷保护作用较好。     

腺苷预处理对缺血再灌注心肌血红素加氧酶-1的影响

目的:观察腺苷预处理对心肌缺血再灌注损伤的影响,探讨血红素加氧酶-1(HO-1)在其中的作用.方法:雄性SD大鼠18只,体重(250±16)g,随机分为3组,每组6只:①对照组(C组),②缺血再灌注组(IR组),③腺苷预处理+缺血再灌注组(AP组).采用结扎/放松左冠状动脉前降支建立心肌缺血再灌注损伤模型.再灌注结束后...     

右美托咪定预处理对肝癌切除手术患者的肝缺血再灌注损伤的价值

目的探讨右美托咪定(Dex)预处理对于肝癌切除手术患者的肝缺血再灌注损伤的影响。方法前瞻性选取辽宁省朝阳市第二医院拟实施半肝切除手术治疗的95例原发性肝细胞癌患者作为研究对象,采用随机数字表法分为预处理组48例和常规组47例,预处理组手术前给予Dex 0.7μg/kg,10 min内输注完毕,后以0.4μg/(kg·h)维持至手术结束,常规组给予等量的0.9%氯化钠溶液。比较2组患者的手术时间、术中出血量、输血率、肝血流阻断时间及手术并发症。比较2组患者手术前、手术后24 h的血清丙氨酸氨基转移酶(ALT)、天门冬氨酸氨基转移酶(AST)、谷氨酰转肽酶(GGT)、总胆红素(STB)、结合胆红素(CB)、丙二醛(MDA)、超氧化物歧化酶(SOD)、肿瘤坏死因子-α(TNF-α)、C反应蛋白(CRP)、高迁移率族蛋白B1(HMGB1)、白细胞介素-6(IL-6)水平。结果 2组患者的手术时间、术中出血量、输血率、肝血流阻断时间比较,差异均无统计学意义(P> 0.05)。术前,预处理组和常规组患者的血清ALT、AST、GGT、STB、CB检测值比较,差异均无统计学意义(P> 0.05);术后24 h,预处理组患者的ALT、AST、GGT、STB、CB分别为(330.2±104.0) U/L、(367.1±110.8) U/L、(31.75±7.25) U/L、(65.20±11.35)μmol/L、(37.67±6.29)μmol/L,均低于常规组[(418.6±120.7) U/L、(440.8±127.6) U/L、(38.00±9.52) U/L、(74.18±13.37)μmol/L、(42.52±8.06)μmol/L],差异均有统计学意义(P <0.05)。术前,预处理组和常规组患者的血清MDA、SOD、TNF-α、CRP、HMGB1、IL-6检测值比较,差异均无统计学意义(P> 0.05);术后24 h,预处理组患者的血清MDA、TNF-α、CRP、HMGB1、IL-6分别为(4.36±1.33)μmol/L、(5.20±1.64)μg/L、(34.75±6.83) mg/L、(258.4±41.7)μg/L、(31.28±9.50)μg/L,均低于常规组[(5.11±1.57)μmol/L、(7.00±2.17)μg/L、(43.80±8.53) mg/L、(295.0±46.4)μg/L、(48.64±11.57)μg/L],预处理组的血清SOD[(126.9±25.0) U/L]高于常规组[(113.1±19.6) U/L],差异均有统计学意义(P <0.05)。预处理组患者的手术并发症发生率(12.50%)与常规组(21.28%)比较,差异无统计学意义(P> 0.05)。结论原发性肝细胞癌患者实施半肝切除手术时,术前Dex预处理能显著减轻肝缺血再灌注损伤,保护肝脏功能。     

Effect of preconditioning temperature on cardioprotection during global ischemia-reperfusion in the rat heart

BACKGROUND: Myocardial ischemic preconditioning (PC) is a protective intervention that aims to reduce the deleterious effects of ischemia-reperfusion injury. OBJECTIVES: : To assess the comparative efficacy of ischemic PC induced at hypothermic, normothermic and hyperthermic temperatures on the postischemic recovery of left ventricular contractile and coronary vascular functions in the aortic perfused rat heart model. METHODS: An isolated aorta-perfused (Langendorff) rat heart model was used. Hearts were studied in eight different groups (n=5 each). Unprotected ischemia for 60 min served as control. For the remaining seven groups, ischemia was preceded by PC at 10 degrees C, 20 degrees C, 30 degrees C, 34 degrees C, 37 degrees C, 40 degrees C and 42 degrees C achieved by two episodes of 5 min ischemia at the designated PC temperature and 10 min of reperfusion, respectively. The postischemic recovery in contractile (maximum developed pressure and left ventricular end-diastolic pressure) and coronary vascular functions (coronary flow and coronary vascular resistance) was assessed at the end of 30 min reperfusion. RESULTS: Hyperthermic PC provided optimal preservation and resulted in a 25% increase in the myocardial and 15% increase in the coronary vascular tolerance to ischemia. Normothermic PC resulted in a 21% increase in myocardial and 14% increase in coronary vascular tolerance to ischemia. Hypothermic PC was comparatively less effective and resulted in 11% increase in myocardial and 15% increase in the coronary vascular tolerance to ischemia. The temperature-dependence of PC may be summarized as: PC-42 degrees C > PC-40 degrees C > PC-37 degrees C > PC-34 degrees C > PC-30 degrees C > PC-20 degrees C > PC-10 degrees C. CONCLUSIONS: The results of the present study indicate that the extent of reversibility of the ischemic damage depends on the PC temperature and that optimal preservation occurred at the ideal PC temperature between 40 degrees C and 42 degrees C.