运动训练中服用“高效强力饮”对心血管功能的效应

本文研究了一种中药水剂——高效强力饮对44名中长跑和游泳运动员运动能力的影响。测试结果表明:服药组与对照组相比,心搏量、射血分数和△D%均有明显增高;而运动后血乳酸水平,平均动脉压和总外周阻力均明显下降。这些都表明服药组有氧代谢能力方面有改善。     

乳酸左氧氟沙星氯化钠注射液细菌内毒素检测中显色基质法的研究

目的：建立一种快速检测乳酸左氧氟沙星氯化钠注射液内细菌内毒素的方法。方法：使用显色基质鲎试剂对不同批号的乳酸左氧氟沙星氯化钠注射液分别进行干扰试验,考察确立乳酸左氧氟沙星氯化钠注射液内毒素定量检查法。结果：表明标准曲线的线性相关系数r≥0.98,乳酸左氧氟沙星在2mg/ml浓度无干扰作用。结论：显色基质法具有灵敏、快速、能定量、重复性好的特点,可用于乳酸左氧氟沙星氯化钠注射液细菌内毒素含量的检测。     

Antioxidative and hepatoprotective effect of CGX, an herbal medicine, against toxic acute injury in mice

Aim

CGX, a modified traditional Chinese herbal drug whose name means “liver cleaning,” is used to treat various liver disorders. This study investigated the protective effects of CGX and its mechanisms.

Material and methods

After pretreating ICR mice twice daily with CGX (po, 50 or 100 mg/kg) or distilled water for three consecutive days, acute liver injury was induced by a single injection of CCl₄ (ip, 10 mL/kg of 0.2% in olive oil) (n = 8 per group).

Results

Pretreatment with CGX significantly attenuated the elevation in biochemical parameters, such as alanine transaminase (ALT), aspartate transaminase (AST), and lactate dehydrogenase (LDH) in serum, and the malondialdehyde concentrations in liver tissue. Pretreatment with CGX significantly restored the reduction of catalase activity and glutathione (GSH) content, but not superoxide dismutase (SOD) activity, and it inhibited the CCl₄-induced high expression of iNOS and TNF-α in hepatic tissue.

Conclusion

This study showed that CGX has hepatoprotective effects against free radical-induced acute injury via primarily antioxidative properties.     

新疆维吾尔族、汉族正常成人和汉族白血病患者粒细胞LDH活性及其同工酶测定

本文测定了26名维吾尔族正常成人及25名汉族正常成人血液中粒细胞的LDH总活力及其同工酶。其结果是:维吾尔族LDH总活力为2224.8±1232.0单位/10~(10)细胞,汉族LDH总活力为2949.3±1062.7单位/10~(10)细胞,两民族间无显著差异。其同工酶谱顺序为维吾尔族LDH_3>LDH_2>LDH_4>LDH_1>LDH_5>,而汉族为LDH_3>LDH_2>LDH_1>LDH_4>LDH_5。同时,我们还测定了11例汉族不同类型白血病患者血液中粒细胞的LDH及其同工酶谱,与正常人比较有很大不同。     

蛇床子素预处理对大鼠心脏缺血再灌注损伤的作用

目的:探讨蛇床子素(osthole,Ost)预处理对大鼠心脏缺血再灌注损伤的作用及其机制。方法:建立大鼠心脏缺血再灌注损伤模型。30只雄性SD大鼠随机平均分为Ost组、模型组和假手术组。假手术组和模型组手术前1 h给予生理盐水(50 mg·kg~(-1),腹腔注射),Ost组缺血前1 h给予Ost(50 mg·kg~(-1),腹腔注射),模型组和Ost组血管夹夹闭左冠状动脉前降支,置于32℃温箱30 min后松开血管夹,4 h后收集各组大鼠心脏和血清。HE染色后观察心脏病理学形态学变化,Western blotting检测P38,p-P38和p-NF-κB;RT-PCR检测白细胞介素-6(interleukin-6,IL-6)、IL-1β和肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)的心脏表达和分泌;ELISA检测乳酸脱氢酶(lactic dehydrogenase,LDH)、心肌型肌酸激酶同工酶(creatine kinase-MB,CK-MB)、肌酸激酶(creatine kinase,CK)、IL-6、IL-1β和TNF-α的水平。结果:与假手术组比较,模型组病理改变,p-P38、p-NF-κB、LDH、CK-MB、CK、IL-6、IL-1β和TNF-α表达均明显增加(P0.05),但P38和NF-κB表达无明显差异。与模型组比较,Ost组病理改变,p-NF-κB、LDH、CK-MB、CK、IL-6、IL-1β和TNF-α表达明显减少(P0.05),但p-P38表达进一步增加,而P38和NF-κB表达仍无明显变化。结论:Ost预处理可通过抑制炎症反应发挥对大鼠心脏缺血再灌注损伤的保护作用,其作用机制与促进P38信号通路激活相关。     

小鼠腹腔注射乳酸钠林格液最大耐受量的研究

目的　评价小鼠腹腔注射乳酸钠林格液 (简称林格液 )的安全性。方法　采用小鼠一次性腹腔注射最大耐受量的方法 ,观察给药后一般状况、血液、呼吸及心率等指标。结果　小鼠一次性腹腔注射最大量 (5 0 0ml/kg)林格液后 ,观察 7天 ,小鼠全部存活 ;血液各项指标均无异常 ;给药前后呼吸、心率对比无明显改变 ;解剖未见明显异常。结论　小鼠腹腔注射林格液最大耐受量为 5 0 0ml/kg。     

乳酸脱氢酶测定对评估机采单个供者血小板保存中损伤的价值

目的探讨测定LDH作为保存SDP的损伤评价标准的价值。方法选择19份SDP样本均分为2组,放置于血小板摇床内保存,保存24 h为实验组,保存1~3 h为对照组,检测并比较2组间LDH值。结果SDP保存24 h后与1~3 h的LDH值存在显著性差异。结论选择悬浮SDP血浆检测LDH水平可评估保存SDP损伤。     

腺苷脱氨酶、溶菌酶和乳酸脱氢酶联合检测对恶性胸(腹)水诊断价值

分析43例恶性胸(腹)水的腺苷脱氨酶(ADA),溶菌酶(LZM)以及乳酸脱氢酶(LDH),其中93％ADA活力低于30u/L,83.7％LZM浓度低于30mg/L,而95.3％LDH高于80IU。发现ADA、LZM的低值及LDH增高是恶性重要特征,而ADA与LDH呈负相关,其特异性优于LZM与LDH。     

LDH、HBDH、LDH同工酶和胆红素在MA和MDS鉴别中的作用研究

目的探讨血清乳酸脱氢酶（LDH）、α-羟丁酸脱氢酶（HBDH）、乳酸脱氢酶同工酶（LDH-i）和胆红素在巨幼细胞贫血（MA）和骨髓增生异常综合征（MDS）鉴别诊断中的作用。方法采用Hitachi-7170/7600型全自动生化分析仪、随机配套试剂、标准程序进行检测,空腹测定MA及MDS患者血清LDH、HBDH、LDH-i及胆红素;应用SPSS13.0统计软件进行统计学处理。结果 32例MA患者8,3.1%表现不同程度黄疸,以间接胆红素（IBIL）增高为主7,9.5%伴LDH、HBDH和LDH-i增高,多数增高达3～10倍;MDS患者血清LDH、HBDH、LDH-i及胆红素基本处于正常范围,且显著低于MA患者（P〈0.01）。MA患者组LDH和HBDH均与总胆红素（TBIL）及IBIL呈显著正相关（P﹤0.05）。LDH-i与TBIL（r=0.59,P=0.096）和IBIL（r=0.60,P=0.091）无相关性,但LDH、HBDH和LDH-i的水平两两相关（P﹤0.01）。结论 MA患者血清LDH、HBDH、LDH-i和胆红素均明显高于MDS患者,MA患者LDH、HBDH、LDH-i与胆红素的增高与骨髓内原位溶血、红细胞破坏增加有关,因此,LDH、HBDH、LDH-i与胆红素的测定对于MA、MDS两者鉴别诊断具有指导意义。     

Variations of p38 MAPK and sICAM-1 with therapeutic effect of different resuscitation fluids on severe traumatic patients

OBJECTIVE: To investigate the dynamic variation and action mechanism of sICAM-1 and p38 mitogen-activated protein kinases (MAPK) signal transduction in human severe trauma and resuscitation, as well as the effect of lactated Ringer's solution(LR), 7.5% sodium chloride solution(HS) and 20% albumin injection(ALB) on the incidence and mortality of multiple organ dysfunction syndrome (MODS). METHODS: Seventy-two severe trauma patients (ISS score 16-43) were divided into ISS < or = 25 and ISS > 25 groups (each group was subdivided into LR, HS and ALB groups). ELISA was used to measure the concentration of sICAM-1. Western blot was used to measure the expression of p38 MAPK. RESULTS: Compared with LR group, the transfusion volume needed for maintaining systolic blood pressure > or = 90 mm Hg was significantly decreased in HS and ALB groups (P < 0.05). Compared with the control group, the concentration of blood sICAM-1 and the expression of p38 MAPK was elevated from 4 to 48 hours after trauma in all experimental groups (P < 0.05-0.01). At 4, 12, and 24 hours, there was significant correlation between the expression of p38 MAPK and sICAM-1 (P < 0.01). Compared with LR group, sICAM-1 and p38 MAPK in HS and ALB groups were decreased (P < 0.05). sICAM-1 and p38 MAPK were significantly higher in the group of ISS > 25 than that of ISS < or = 25 (P < 0.05). MODS incidence and mortality were significantly higher in the group of ISS > 25 than that of ISS < or = 25 (P < 0.05). MODS incidence and mortality were lower in HS and ALB groups than LR group (P < 0.05). CONCLUSIONS: The up-regulation of polymorphonuclear neutrophil-endotheliocytes (PMN-EC) adhesion may be due to the increased sICAM-1 expression during severe trauma. The up-regulation of sICAM-1 expression is correlated with the activation of p38 MAPK. During severe trauma, the levels of sICAM-1 and p38 MAPK, as well as the incidence and mortality of MODS are lower when HS and ALB are used than single lactated LR solution is used.