低强度激光血管内照射对实验性糖尿病兔血液流变性质的影响

本实验用３８只实验性糖尿病兔,分别采用１．２ｍｗ、１．５ｍｗ、２．２ｍｗ×５０分钟三组不同剂量Ｈｅ—Ｎｅ激光,分两批作一次性血管内照射,测定其红细胞变形能力等８项血液流变学指标,并观察指标随时间的变化。结果表明：（１）激光照射后血液粘度降低,红细胞聚集性降低,且在２４小时内就有反映,５—７天仍然有效;（２）能提高红细胞变形能力,以照射后第３天最明显。５—７天后会回复照射前水平。此结果可为低强度激光血管内照射临床应用选择照射频度提供参考（３）可改善红细胞刚度,但时间上反映较迟     

高胆固醇血兔红细胞变形能力的改变及其防治

本实验利用激光衍射法研究正常家兔和高胆固醇血兔的红细胞变形能力及衍射图的改变。结果表明：高胆固醇血兔在喂胆固醇粉４周后其红细胞的变形能力和红细胞衍射图开始发生明显改变。血清胆固醇水平增加所引起的脂质过氧化产物的异常增高和脂质过氧化作用致使红细胞膜硬度的增加是导致红细胞变形能力恶化的重要原因。由于黑茶的抗氧化和阻断脂质过氧化物连锁反应的作用,口服黑茶可以有效地改善红细胞的变形能力。     

大强度训练及恢复后大鼠红细胞变形能力和红细胞膜蛋白的变化

目的 :探讨运动对红细胞变形性和红细胞膜蛋白的影响及其相互关系。方法 :设计不同强度的训练方案 ,用激光衍射法测定红细胞变形能力 ,用SDS PAGE方法测定一定体积大鼠红细胞膜中的重要蛋白带 3蛋白 (band 3)和肌动蛋白 (actin)的含量 ,研究运动即刻和恢复后红细胞变形性及膜蛋白的变化。结果 :长期的运动训练会促进大鼠红细胞变形能力的改善和红细胞膜band 3蛋白和actin的良好发展 ,一次大强度训练会引起红细胞膜band 3蛋白和actin含量的减少 ,大鼠红细胞变形能力降低 ,一周和二周的大强度训练会提高恢复期大鼠红细胞的变形能力和红细胞膜band 3蛋白和actin含量。结论 :运动训练造成的红细胞膜蛋白含量的变化 ,导致了红细胞膜结构的改变 ,从而影响红细胞变形能力 ,可能是训练对红细胞变形能力的作用机制之一。     

低强度氦氖激光对缺血性疾病患者红细胞变形性影响的临床研究

目的：探讨低强度氦氖激光对临床中风等缺血性疾病患者红细胞变形能力影响情况。方法：临床采集不同缺血性疾病患者新鲜血样,检测各组红细胞变形能力情况。对中风患者血样进一步分组,给予不同剂量的氦氖激光处理,讨论临床低强度氦氖激光量效关系,探讨具有临床疗效的有效剂量情况。结果：各疾病病组红细胞变形能力较正常对照组红细胞变形能力为低;缺血疾病组样品经低强度氦氖激光照射后,其红细胞变形能力较未经激光照射组有显著不同。结论：显示体外人红细胞变形能力因患者疾病情况、红细胞状态、低强度氦氖激光临床治疗输出功率等因素有不同。     

低强度He-Ne激光对红细胞胞浆内游离钙离子浓度的影响

低强度He-Ne激光对红细胞变形性的影响已得到广泛的认可和应用,但其具体调节机制尚不明确,通过研究低强度He-Ne激光对红细胞胞浆内钙离子浓度的影响,探讨其对红细胞变形性影响的机制。采用A23187处理过的红细胞,分别用5 mW和9 mW激光照射后,观察红细胞胞浆内钙离子浓度变化。结果显示:低强度He-Ne激光照射后的红细胞与无照射组的红细胞相比,红细胞胞浆内钙离子浓度显著降低,但在本实验中钙离子浓度的降低与激光照射剂量无显著相关。由此得出结论:降低红细胞胞浆内钙离子浓度可能是低强度He-Ne激光调节红细胞变形性的重要机制。     

激光生物学技术研究高脂血症大鼠红细胞变形能力改变及其机制

目的:通过研究红细胞膜流动性以及红细胞骨架结构的改变,进一步探讨高脂血症大鼠红细胞变形能力改变的机制。方法:16只Wistar大鼠随机分为两组:高血症组和对照组。高脂组给予高脂饮食。16周后,腹主动脉采血,采用酶比色法检测血浆甘油三脂、胆固醇含量;并利用激光衍射法测定红细胞变形指数、取向指数,荧光偏振法测定红细胞膜流动性,激光共聚焦显微镜观测红细胞骨架改变和红细胞F-actin的含量。结果:发现高脂血症大鼠红细胞的变形指数、取向指数以及红细胞膜的流动性显著降低(P<0.05),红细胞形态和骨架发生改变,F-actin含量显著降低(P<0.05)。结论:高脂血症大鼠红细胞变形能力降低与红细胞膜结构改变有一定的关系。     

低强度激光对人红细胞生物物理特性的影响

研究不同功率的低强度He-Ne激光对正常人体红细胞流变学特性影响。以正常人体红细胞为研究对象,测量了低强度He-Ne激光在不同照射时间、不同功率条件下红细胞的变形、取向、膜流动性、膜的微粘度和渗透脆性的变化情况。结果表明:照射后红细胞的变形性和膜流动性增强、渗透脆性下降。照射对红细胞流变学特性影响显著,其中激光能量为0.24 J、照射血样为2 mL时取得的照射效果最佳。     

低强度激光鼻腔照射对血脂异常作用的研究

目的：观察低强度激光（650nm／5mw）鼻腔照射疗法对血脂异常的作用。方法：30例原发性血脂异常患者随机分为两组,分别接受药物（舒降之）治疗和低强度激光鼻腔照射疗法,测定治疗前后的血脂水平。结果：在调整饮食的基础上,低强度激光经鼻腔照射使病人的血清总胆固醇水平降低了5．8％（P=0．031）,甘油三酯降低了8．8％;低强度激光鼻腔照射在有效调整血脂的同时,使谷丙转氨酶（J唧）水平下降了23．1％（P=0．022）,对肝功能具有保护作用。结论：与舒降之相比,低强度激光鼻腔照射疗法的调脂效果虽然相对较弱,但基于安全性的考虑,在饮食控制无效或肝功能异常的病人中使用低强度激光鼻腔照射仍然具有一定的应用价值。     

低强度激光照射对老龄小鼠的抗氧化系统的影响

目的：研究低强度激光照射对机体抗氧化系统的影响。方法：采用不同剂量的低强度He-Ne激光照射老龄小鼠肝区,照射后观察T－SOD,Cn-SOD,Mn-SOD,T-AO,GSH-PX,GSH,MDA等指标。结果：能量密度分别为2．48J／cm^2,12．48J／cm^2,18．72J／cm^2的低强度He-Ne激光可提高,Cu,Zn-SOD,Mn-SOD,总SOD,及GSH－PX活性,可提高GSH含量和总抗氧化能力,降低MDA含量,其中以能量密度为18．72J／cm^2最为显著,使老龄小鼠以上各项指标恢复接近正常水平。结论：低强度激光照射可以提高机体抗氧化酶的活性和抗氧化剂的含量,增强机体抗氧化能力。     

低浓度戊二醛对红细胞膜力学特性的影响

采用显微动态图像分析技术无扰、实时、在位地研究了低于0．005％浓度的戊二醛对年轻、老龄红细胞膜变形能力的作用．实验结果表明随着戊二醛浓度的增加,年轻、老龄红细胞膜的弯曲弹性模量明显变大,而老龄红细胞增加幅度更大;且随着戊二醛固定时间的延长,年轻、老龄红细胞膜变形能力的差距越来越大．说明作为免疫分析中常用固定剂的戊二醛对年轻、老龄红细胞细胞骨架的影响差异较大。研究结果可为适当选取在免疫分析测定中,以及以年轻红细胞作为药物载体时需采用的戊二醛浓度提供依据。     

低强度532nm与633nm激光血管内照射生物效应比较

目的：研究同等照射条件的低强度532nm与633nm激光血管内照射对家兔白细胞计数与淋巴细胞凋亡的影响,比较两种激光生物效应的特点。方法：用532nm和633nm激光对健康日本大耳白家兔血管内照射,平均照射功率均设在5mW左右,照射总能量约12J。两组家兔均于照前及照后1d、4d、7d、11d进行外周血白细胞计数,于照前及照后1d、5d进行淋巴细胞凋亡分析。结果：532nm激光照射后,家兔外周血白细胞计数表现为先显著升高后趋向恢复,633nm激光照射后白细胞计数变化类似,但与照前相比升高不明显;与照前相比,两组家免外周血淋巴细胞凋亡比例于照后1d均明显降低,照后5d均显著升高;两组家兔相比,照射后白细胞计数差别明显,但淋巴细胞凋亡比例差异不显著。结论：同等照射条件下,低强度532nm与633nm激光照射血液的生物效应相似,都可以促进白细胞的代谢更新,只是532nm激光的效应略强一些。     

低强度激光联合照射犊鼻穴和口咽部对膝骨关节炎兔细胞因子IL-1β及TNF-α的影响

目的：探讨携带针灸补泻信息的激光联合多部位照射对膝骨关节炎兔血清和关节液中细胞因子的影响。方法：40只新西兰兔随机分成对照组、模型组、穴位照射组和联合照射组。兔左侧膝关节腔内注入木瓜蛋白酶造成关节炎的病理模型,穴位照射组和联合照射组分别以低能量激光（输出功率10—20mW）连续照射犊鼻穴和携带针灸补泻信息的脉冲激光联合照射口咽部及犊鼻穴,10min／d,5d为1个疗程,连续3个疗程。采用放射免疫的方法测定血清及关节液中相关细胞因子含量的变化,常规病理学切片观察膝关节软骨组织形态学变化。结果：与对照组比较,模型组血清和关节液中IL-1B及TNF—α含量均显著升高（P〈0．01）;与模型组比较,穴位照射组和联合照射组血清和关节液中IL-1β及TNF—α含量均下降,但以联合照射组效果显著（P〈0．05）;穴位照射组和联合照射组之间的IL-1B及TNF-饯含量未表现出显著性差异（P〉0．05）。结论：激光联合照射口咽部和犊鼻穴和激光照射犊鼻穴都能减少细胞因子IL-1β及TNF-α的生成,减轻关节软骨细胞的结构损伤,起到保护关节软骨、防治骨性关节炎的作用,但联合多部位照射效果优于单独穴位照射。     

Toxicity bioassay in Sprague-Dawley rats exposed to 20 kHz triangular magnetic field for 90 days

Sprague-Dawley rats (10 each of male and female per group for sham and magnetic field exposed) were exposed in a carrousel irradiator to 20 kHz intermediate frequency (IF) magnetic field at 6.25 microT rms for 8 h/day, 5 days/week for 90 days. Urine analysis (pH, serum glucose, protein, ketone bodies, RBC, WBC, bilirubin, urobilinogen, and specific gravity), blood analysis [WBC, RBC, hemoglobin, hematocrit, mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), thrombocyte count, and leucocyte count], blood biochemistry (total protein, blood urea nitrogen, creatinine, glucose, total bilirubin, total cholesterol, aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, and lactate dehydrogenase), and histopathological analysis for organs such as liver, kidney, testis, ovary, spleen, brain, heart, and lung were performed on day 90. Results showed no significant differences in the above analyses between IF magnetic field exposed and sham control rats. Therefore, we conclude that there were no significant toxicities in rats exposed to 20 kHz IF triangular magnetic field-exposure for 90 days.     

HeNe激光对瘢痕组织影响的实验研究

目的 :寻求瘢痕组织的康复疗法。方法 :家兔 2 0只 ,在臀部一侧人工形成瘢痕。随机分为激光治疗组和对照组 ,每组 1 0只。对激光治疗组家兔于术后第 3天开始用低能量 He Ne激光照射治疗 ,每天一次 ,每次1 5分钟 ,连续照射 1 0天。于术后第 2 0天 ,将家兔全部处死 ,对每只做过实验的臀部 ,均整块地切其软组织做病理检查。结果 :激光治疗组感染消失和切口愈合平均天数分别为 4 .2天和 5.9天。对照组感染消失和切口愈合平均天数分别为 1 2 .9天和 1 4 .8天。显微镜下可见表皮增厚 ,瘢痕及横纹肌退变等异常改变。这些变化以激光治疗组为最轻 ,与对照组比 P<0 .0 1 ,有非常显著差异。结论 :早期应用 He Ne激光照射治疗 ,有防治瘢痕形成及促进瘢痕软化的作用。     

Effect of zinc on the lipid peroxidation and the antioxidant defense systems of the alloxan-induced diabetic rabbits

The effects of oral zinc supplementation on lipid peroxidation and the antioxidant defense system of alloxan (80-90 mg/kg)-induced diabetic rabbits were examined. Forty-five New Zealand male rabbits, 1 year old, weighing approximately 2.5 kg, were allocated randomly and equally as control, diabetic, and zinc-supplemented diabetic groups. After diabetes was induced, zinc-supplemented diabetic rabbits had 150 mg/L of zinc as zinc sulfate (ZnSO(4)) in their drinking tap water for 3 months. The feed and water consumption was higher in diabetic groups than (P<0.01) healthy rabbits. The body weight was lower in diabetic rabbits compared to control. The blood glucose levels were higher in diabetic groups than controls. The elevated plasma malondialdehyde (MDA) levels were determined in the diabetic group (P<0.01). The glutathione peroxidase (GSH-Px), catalase (CAT), superoxide dismutase (SOD), glutathione (GSH), and ceruloplasmin levels in the diabetic group were decreased by the effect of diabetes but there was no difference between zinc-supplemented diabetic and control rabbits. Serum zinc concentrations were lower in diabetic rabbits but iron (Fe) and copper (Cu) levels in sera were not different among the groups. As a result, it was concluded that daily zinc supplementation could reduce the harmful effects of oxidative stress in diabetics.     

磁处理水对家兔血脂影响的实验研究

目的:探讨饮用磁处理水时间的长短与降低家兔血脂的关系。方法:72只家兔平均分四组A组基础饲料组,饮自来水;B、C、D高脂饲料组,B组对照组饮自来水;C组治疗1组,30天后饮磁处理水,治疗30天后采耳血,分别测血清TC、TG、HDL-c、LDL-c水平。D组治疗2组,30天后饮磁处理水,治疗100天后采耳血,分别测血清TC、TG、HDL-c、LDL-c水平。结果:B组家兔血清TC、TG、HDL-c、LDL-c水平显著高于A组,(P<0.01);C组家兔TC、LDL-c水平显著低与B组(P<0.01);,但也显著高于A组(P<0.01);TG、HDL-c水平与B组相比无显著差异(P>0.05)。D组家兔血清TC、TG、LDL-c水平与B组相比均有明显下降(P<0.01),与A组比较差异无显著性(P>0.05),而HDL-c水平与A组比较明显上升(P<0.01)。结论:长期饮用磁处理水可以显著降低家兔血清高胆固醇含量,并恢复到正常状态。     

Impaired erythrocyte deformability precedes vascular changes in experimental diabetes mellitus.

The effect of diabetes on the red blood cell (RBC) deformability and its association with histological vascular changes was investigated in 35 streptozotocin-induced diabetic Wistar rats in a 30-day experiment and compared to 10 controls. RBC deformability was significantly impaired in the diabetic rats on day 5 (p < 0.001) and continued to deteriorate until day 20. On the 20 (th) day, the diabetic rats were randomly divided into two groups (group A: insulin-treated; group B: non-insulin-treated). A slight, non-significant (p = 0.20) improvement in RBC deformability was noticed in the insulin-treated group. In vitro incubation of RBCs with insulin did not improve the acquired RBC rigidity in either diabetic group. In contrast, it caused a significant reduction in RBC-deformability in the controls. On day 30, histological examination of arterial specimens from various sites revealed moderate to significant thickening in medium- and small-size artery and arteriole walls in both diabetic groups, with no evidence of diabetes-related changes in large, elastic-type arteries. No vascular changes were noticed in nine diabetic rats that succumbed between days 10 and 15. The results of this study indicate that reduced RBC deformability is an early manifestation of abnormal blood rheology in experimental diabetes, and precedes the evolution of vascular changes.     

不同激光照射方法对周围神经再生的影响

为研究不同半导体激光照射方法对周围神经损伤的影响,将96只家兔随机分为3周,6周,9周,12周4个观察期组,每个观察期组又随机分为不同照射方法的治疗组和对照组。建立动物模型后,各照射组在术后1d开始照射治疗,激光功率为10mw,每次照射10rain,每天一次,连续照射10d。照射治疗A组对准损伤神经吻合部位进行照射,照射治疗B组照射家兔L5、L6脊髓节段,照射治疗c组在对准吻合处进行照射同时还要照射L5、L6脊髓节段,对照组激光输出功率为零。实验结果表明低能量半导体激光照射能促进轴突再生,改善再生神经功能,以同时照射损伤周围神经部位和相应脊髓节段效果最为显著。     

Fluctuation of thrombin-antithrombin III complex in patients with acute myocardial infarction: influence of low-dose heparin administration.

The haemostatic parameters were studied within 14 days of acute myocardial infarction (AMI) in 103 patients randomly allocated into a group receiving low-dose heparin or into a group treated without anticoagulants. Patients with isotopic evidence of deep vein thrombosis were excluded from the analysis. An important formation of thrombin-antithrombin III complex (TAT) in the plasma was detected in the early stage of the disease. It was accompanied by an activation of plasma intrinsic fibrinolysis (IF), an elevation of fibrinogen and its degradation products (FDP) and a reduction of extrinsic plasma fibrinolytic activity (EF) together with normal levels of factor X, antithrombin III (AT III), protein C and alpha-2-antiplasmin. Sequentially studies periods of the disease revealed a diminution of TAT complex concentration in the plasma on the seventh day of AMI together with a rise of the both plasma fibrinolytic activities (IF, EF) as well as an elevation of fibrinogen and its degradation products, returning to the initial values on the 14 day of AMI. In the patients treated with heparin the augmentation of TAT complex in the plasma was prolonged until the fifth day of AMI. Moreover, heparin administration was connected with significantly higher levels of AT III and protein C along with a lower concentration of factor X and FDP on the seventh day of the disease. The fluctuation of fibrinolytic activities (IF, EF) in the plasma was heparin-independent. The present results indicate that low-dose heparin treatment modulates the plasmatic fluctuation of TAT complex as well as factor X, AT III and protein C levels in patients with acute myocardial infarction.     

He-Ne激光照射对血液及其组分荧光光谱影响的实验研究

为研究弱激光照射对人血液携氧能力的影响及机制,我们用荧光仪分别测量了He-Ne激光照射前后正常血液及其组分（血浆、红细胞）的荧光光谱,研究了激光照射导致的光谱变化,并分析了光谱变化与血液携氧能力改变的关系。实验结果显示：全血液标本在490nm及614nm附近有荧光峰值;血浆的荧光则主要分布在420－500nm之间;红细胞在500nm及614nm附近有荧光。He-Ne激光照射后,全血液及红细胞在614nm处的荧光谱都有较明显的变化,且较相似。由此可得出结论,He-Ne激光照射可影响血液的携氧能力。