He-Ne激光对慢性萎缩性胃炎大鼠胃黏膜的影响

为探讨He-Ne激光对慢性萎缩性胃炎(CAG)大鼠胃黏膜的影响,将52只成年雄性Wistar大鼠随机分成正常组、非治疗组及各激光治疗组。应用2%水杨酸钠和30%酒精的混合溶液灌胃8周,刺激大鼠胃黏膜,并结合劳累、饥饱失常等多因素方法建立大鼠CAG模型,各治疗组在造模完成后,分别给予不同剂量(6.24J·cm-2,4.80J·cm-2,3.36J·cm-2)的He-Ne激光照射,每日一次,连续20d,观察各组大鼠胃黏膜的变化。发现3.36J·cm-2的He-Ne激光组与非治疗组比较,胃黏膜变厚(P<0.01),炎细胞减少(P<0.05),细胞形态、结构、体积、均恢复或接近正常;CyclinD1的阳性表达率较高(P<0.05)。表明3.36J·cm-2的He-Ne激光照射能够促进CAG大鼠的胃黏膜功能恢复,疗效显著。     

红外线对萎缩性胃炎大鼠PCNA及Bcl-2表达的影响

目的 观察红外线照射在大鼠慢性萎缩性胃炎（chronic atrophic gastritis,CAG）中对增殖细胞核抗原（proliferating cell nuclear antigen,PCNA）和B细胞淋巴瘤/白血病-2（B-cell lymphoma-2,Bcl-2）表达的影响,探讨红外线与胃黏膜癌前病变、细胞凋亡的关系.方法 应用水杨酸钠和酒精的混合溶液灌胃,并结合劳累、饥饱失常等多因素建立大鼠CAG模型,采用红外线灯照射CAG大鼠,免疫组化法检测各组大鼠PCNA及Bcl-2的表达.结果 PCNA及Bcl-2在模型对照组胃黏膜中均呈高表达（P〈0.05）,但在红外线组均无显著降低.结论 红外线照射未能降低PCNA及Bcl-2 的表达,细胞的增殖调节改善作用不明显.     

红外线对CAG大鼠治疗作用的病理学研究

目的:观察红外线对实验性大鼠慢性萎缩性胃炎的治疗作用.方法:采用水杨酸钠、酒精灌胃,刺激大鼠胃粘膜,并结合劳累、饥饱失常等多因素方法连续造模8周,建立慢性萎缩性胃炎(CAG)大鼠模型..红外线治疗采用220V,200W的红外线灯,垂直照射大鼠胃部投影区,1次/日,10min/次,连续照射20天.光镜下观察胃粘膜的炎症程度及壁细胞的形态、结构等,用测微器测量胃粘膜厚度.结果:模型组大鼠体质量明显减轻(P＜0.01),胃粘膜变薄(P＜0.01).光镜下可见胃粘膜层腺体萎缩,炎细胞浸润,部分标本伴有肠上皮化生.红外线治疗组大鼠胃粘膜增厚,与正常对照组比较差异显著(P＜0.01).炎细胞明显减少(P＜0.05),细胞形态、结构、体积均恢复或接近正常.结论:红外线是一种治疗大鼠慢性萎缩性胃炎的有效途径.     

He-Ne激光、微波、红外线和TDP灯照射对血粘度与红细胞影响的比较研究

目的比较研究He-Ne激光、微波、红外线和TDP灯照射对高血粘的影响,探索能否利用He-Ne激光、微波、红外线和TDP灯照射降低血液粘度,改善血循环.方法每份血样等分5份,1份作对照,对另外4份分别作He-Ne激光、微波、红外线和TDP灯照射处理.结果高血粘血样经He-Ne激光、微波、红外线和TDP灯照射作用后,全血表观粘度η降低(P＜0.01)、红细胞电泳率EPM加快(P＜0.01),血沉速度ESR提高(P＜0.01),一氧化氮、全血黏度、全血还原黏度降低(P＜0.01).红细胞变形指数降低(P＜0.01),红细胞聚集时间增加(P＜0.01),红细胞压积降低(P＜0.01),纤维蛋白降低(P＜0.01).结论He-Ne激光、微波、红外线和TDP灯照射能改善高血粘血样的流变特性.而且激光效果最好,依次是TDP灯、微波和红外线.进一步了解物理与临床治疗的密切关系.     

改善血液流变特性的He-Ne激光血管照射技术研究

目的:研究用He-Ne弱激光不同照射方式,对兔红细胞变形指数的影响。方法:选成年大耳白兔21只,随机分成内照射组、外照射组和对照组,每组各7只。照射组采用国产He-Ne激光器,分别作兔耳外周静脉血管外照射和内照射,照射频率1次/24h,照射时间50min/次。照射前、照射一次后、照射7次后,各取静脉血检测全血黏度和红细胞变形指数。对照组正常对照饲养。检测在体血管对He-Ne激光的透过率。结果:内照射组和外照射红细胞变形指数均提高显著(P<0.05);活体血管组织对He-Ne激光的透过率为83.5%。结论:He-Ne激光血管外照射与内照射均能有效提高红细胞变形能力,改善微循环。     

Effect of He-Ne Laser on the Expressions of EGF and EGFR in Gastric Mucosa of Chronic Atrophic Gastritis

To investigate the histological change and the expressions of epidermal growth factor (EGF) and epidermal growth factor receptor (EGFR) in atrophic gastric mucosa in rats so as to appraise the effect of these regulators on the formation of atrophic gastritis, to study the expressions of EGF and EGFR in rats with chronic atrophic gastritis (CAG) after the irradiation of He-Ne laser, and to investigate the relations of He-Ne laser and precancerous lesion or apoptosis. The rats were divided into normal group, model group and laser group. The models of CAG rats were established with enema which was the mixed liquor consisted of sodium salicylate and alcohol, combined with irregular fasting and compulsive sporting as pathogenic factors. He-Ne laser(3.36 J/cm2 ) was used to irradiate CAG rats, once a day for 7 min, 20 days as a course of treatment; the expressions of EGF and EGFR were detected with immunohistochemical method. During the process of antral atrophy, the expressions of EGF and EGFR increased, they were higher in model group than those in normal group (P<0.05). After the irradiation of He-Ne laser, the expressions of EGF and EGFR were obviously lower than those in model group (P<0.05). We draw the conclusion as follows: gastric mucosa of model rat is in a hyper-proliferation status, with high protein expressions of apoptosis suppressor EGF and EGFR. CAG has some correlation with the imbalance between cell proliferation and apoptosis. He-Ne laser (3.36 J/cm2 ) can reduce the expressions of EGF and EGFR, which is an effective physiostimulator to stimulate the gastric mucosa of rat. The appropriate secretions of EGF and EGFR are propitious to the repair and regeneration for the gastric mucosa tissues, thus preventing CAG to canceration.     

635/808 nm双波长半导体激光与632.8 nm氦氖激光照射对术后切口愈合疗效的比较

目的 观察635/808 nm双波长半导体激光与氦氖（He-Ne）激光低强度照射对手术切口愈合疗效的比较.方法 选择非恶性肿瘤手术患者168例,随机分为2组,试验组83例,手术切口予以半导体激光治疗仪低强度照射;阳性对照组85例,手术切口予以He-Ne激光治疗仪照射,以伤口红、肿、热、痛、渗出、裂开等临床表现和不良事件以及切口长度差距为指标观察2组手术切口愈合情况.结果 试验组和对照组切口愈合情况差异无统计学意义（P＞0.05）.结论 双波长半导体激光照射对手术切口愈合的疗效与He-Ne激光治疗效果相当.     

低能量氦氖激光照射增加大鼠心肌血管内皮生长因子的表达

目的　探求低能量氦氖激光照射大鼠心前区 ,对心肌血管内皮生长因子 (VEGF)表达的影响。　方法　采用RT PCR和免疫组织化学染色图像分析的方法 ,实验动物分对照组和激光照射组 ,每组 8只 ,照射组的照射剂量为 6 0 5J cm2 。　结果　VEGF免疫组织化学染色示照射组心肌微血管内皮细胞的着色较重 ,其平均光密度值为 0 2 4 6± 0 0 15 ,明显高于对照组的 0 2 18± 0 0 12 (t=9 0 5 ,P <0 0 5 ) ;心肌组织VEGF16 5的RT PCR产物表达显示 ,激光照射组的VEGF16 5mRNA表达为对照组的 2 79倍。　结论　以剂量为 6 0 5J cm2 的He Ne激光照射大鼠心前区 ,心肌微血管及心肌组织VEGF的表达明显增强。     

氦氖激光照射大鼠心前区对心肌超氧化物歧化酶的影响

目的：为研究低强度激光对自由基代谢的影响,应用不同剂量的氦氖激光照射成年Wistar大鼠的心前区,观察心肌组织中超氧化物歧化酶（SOD）的变化。方法：采用2.87 J/cm^2、7.17 J/cm^2、28.66 J/cm^2三种激光剂量照射成年大鼠心前区,用光化学扩增法检测其心肌SOD含量。结果：能量密度为7.17 J/cm^2的氦氖激光照射,可降低心肌组织的SOD含量,而28.66 J/cm^2的氦氖激光照射,使心肌组织SOD含量升高。结论：氦氖激光照射可改变大鼠心肌SOD含量。     

810 nm弱激光抑制M1型骨髓源性巨噬细胞极化促进脊髓背根神经元轴突生长

目的研究810 nm弱激光对原代培养M1型骨髓源性巨噬细胞(BMDM)表型极化及分泌对背根神经节(DRG)神经元轴突的作用。方法分离培养BMDM,经脂多糖(LPS)联合γ干扰素(IFN-γ)诱导BMDM向M1表型极化,采用流式细胞术检测细胞F4/80和CD16/32表达。将诱导成熟的M1型BMDM随机分为弱激光照射组与对照组。照射组分别采用波长810 nm,0.4J、 4J和10J的弱激光进行照射;对照组不进行照射。照射后24 h,反转录PCR法检测M1型BMDM诱导型一氧化氮合酶(iNOS)的mRNA水平, Western blot法检测iNOS的蛋白水平, ELISA检测培养细胞上清液肿瘤坏死因子α(TNF-α)、白细胞介素1β(IL-1β)、脑源性神经营养因子(BDNF)、神经生长因子(NGF)的含量,免疫荧光细胞化学染色检测神经元核蛋白(NeuN)和β-微管蛋白Ⅲ(β-tubulinⅢ)的表达,确定M1型BMDM上清液培养对DRG神经元轴突生长的影响。结果与对照组相比,各能量参数弱激光照射后24 h, M1型BMDM iNOS mRNA水平均显著下调, 4J弱激光照射组下调最显著; 0.4J及4J弱激光照射组iNOS蛋白水平显著下调, 4J弱激光照射组下调水平较0.4J弱激光照射组更显著。4J和10J弱激光照射组M1型BMDM TNF-α的分泌明显减少,各照射组M1型BMDM IL-1β的分泌明显下调, 0.4J及4J弱激光照射组抑制程度较10J弱激光照射组更为显著。4J弱激光照射组明显促进M1型BMDM的BDNF和NGF分泌。采用照射后的BMDM上清液过继培养DRG 24 h后, 4J及10J弱激光照射组上清液可显著促进DRG神经元轴突的生长。结论弱激光照射可以抑制M1型BMDM表型极化及促炎因子TNF-α、 IL-1β分泌,上调神经营养因子BDNF和NGF的分泌,促进DRG神经元轴突的生长,且呈一定的剂量依赖性。     

HMME-PDT对大鼠致龋模型中变形链球菌抑制作用的研究

目的 探讨不同参数光动力疗法(PDT)在大鼠口腔龋齿预防中的作用.方法 用变形链球菌感染Wistar大鼠口腔,建立龋齿模型.以0.9%生理盐水、0.2%氟化钠为对照组,单纯激光、单纯光敏剂、不同参数PDT为实验组.采用血卟啉单甲醚(HMME)为光敏剂,532 nm半导体激光为光源,每周处理牙齿1次,5周后处死大鼠,Ke...     

云母对大鼠慢性萎缩性胃炎的预防作用及机制研究

目的：研究云母对大鼠慢性萎缩性胃炎的预防作用并探讨其机制。 〖HTH〗方法：以60%的乙醇、20 mmol/L 的去氧胆酸钠和0.1%的氨水在24周建立SD大鼠慢性萎缩性胃炎模型。在造模的同时用云母进行预防实验。实验终期观察鼠胃黏膜大体观及各项病理学指标，并检测血清表皮生长因子和生长激素浓度。 〖HTH〗结果：云母预防组胃黏膜腺体排列规则，无明显的萎缩现象；胃窦部的胃黏膜炎症级别低于模型组（P<0.01）；胃黏膜腺体厚度(L1)和黏膜肌层厚度(L2)之比(L1/L2) 高于模型组（P<0.01）；单位长度内胃黏膜腺体数目高于模型组（P<0.01）。与正常组无明显差别（P>0.05）。胃窦部黏膜增殖细胞核抗原表达阳性的高度及血清表皮生长因子浓度高于模型组(P<0.01，P<0.05),而生长激素浓度与模型组无明显差别。 〖HTH〗结论： 云母对大鼠慢性萎缩性胃炎的形成有预防作用。减少损伤因子的破坏作用、促进胃黏膜细胞增殖及内源性的表皮生长因子分泌，可能是其重要作用机制。     

昆明山海棠对胶原诱导型关节炎大鼠的作用及可能机制

探讨昆明山海棠(THH)对胶原诱导型关节炎(CIA)大鼠的作用及可能机制。取60只大鼠随机分6组,建立CIA大鼠模型,分别采用不同剂量的THH每天灌胃1次,连续30d。动态观察关节炎指数(AI)及关节的病理改变,用RT-PCR及免疫组化法分别检测HIF-1αmRNA及其蛋白的表达。结果显示,THH可明显抑制CIA大鼠的足爪肿胀,减轻滑膜增殖及炎症反应,降低HIF-1α表达,其中以中剂量THH的治疗效果最佳。以上结果表明THH治疗CIA大鼠具有明显疗效,其作用机制可能与降低外周血以及滑膜组织内的HIF-1α的表达有关。     

黑骨藤抗急性痛风性关节炎的实验研究

目的:探讨黑骨藤在急性痛风性关节炎中的治疗效果。方法:健康雄性SD 大鼠60 只,随机等分为空白对照组(NC 组)、模型组(M 组)、秋水仙碱组(C 组)、黑骨藤高剂量组(HD 组)、黑骨藤中剂量组(MD 组)和黑骨藤低剂量组(LD组)。除空白对照组外,其余大鼠均采用尿酸钠制备大鼠痛风性关节炎模型,用秋水仙碱(阳性对照)和不同剂量的黑骨藤灌胃给药治疗。治疗3、5、7 d 后观察各组大鼠关节肿胀情况。治疗7 d 后处死大鼠,取踝关节组织进行病理学检查,应用ELISA检测各组大鼠外周血中IL-1、IL-6、IL-8 及TNF-α的表达。结果:黑骨藤干预组大鼠踝关节肿胀程度明显低于模型组,且治疗7 d 后黑骨藤高剂量组疗效显著高于低剂量组(P<0.05);与模型组相比,黑骨藤治疗组均有较少的炎细胞浸润,且黑骨藤高剂量组趋于正常对照组;黑骨藤干预组炎症因子IL-1、IL-6、IL-8 及TNF-α水平显著低于模型组,呈剂量依赖性。结论:黑骨藤在大鼠急性痛风性关节炎中具有很好的治疗效果,且呈剂量依赖性,其机制可能与黑骨藤降低急性痛风性关节炎大鼠血清炎症因子表达有关。     

苦参凝胶对银屑病大鼠皮肤损伤组织病理学及IL-6、PAR-2水平的影响

目的 研究苦参凝胶对银屑病大鼠皮肤损伤组织病理学及IL-6、蛋白酶活化受体-2(monoclonal antibody to protease activated receptor 2,PAR-2)水平的影响。方法 将60只Wistar大鼠分为对照组、模型组、维A酸组、苦参凝胶高、中、低剂量组，每组10只，观察各组大鼠一般情况、皮肤损伤病理改变、炎症细胞浸润评分、Baker评分及血清和皮肤组织中IL-6、PAR-2水平。结果 维A酸组和苦参凝胶各剂量组大鼠背部皮肤鳞屑、红斑较模型组有所减轻，苦参凝胶组大鼠症状减轻程度优于维A酸组。维A酸组和苦参凝胶各剂量组大鼠背部皮肤病理改变较模型组有不同程度的改善，苦参凝胶中、高剂量组改善程度优于维A酸组。炎症细胞浸润评分、Baker评分及IL-6、PAR-2水平测试，模型组较对照组明显升高（P<0.05），各治疗组较模型组明显降低（P<0.05），苦参凝胶中、高剂量组较维A酸组明显降低（P<0.05）。结论 苦参凝胶对银屑病大鼠皮肤损伤组织病理学表现及IL-6、PAR-2水平具有改善作用。     

Effect of various doses of palm vitamin E and tocopherol on aspirin-induced gastric lesions in rats

This study examined the effects of vitamin E on the prevention of aspirin-induced gastric lesions. The study was divided into two phases. Phase 1 determined the effects of various doses of palm vitamin E on the factors affecting mucosal integrity. Thirty-two male rats of the Sprague-Dawley strain (200-250 g) were randomly divided into four groups. Group I was fed a normal diet (control), Groups II, III and IV were fed a diet supplemented with palm vitamin E in a dose of 60 mg/kg food, 100 mg/kg food and 150 mg/kg food, respectively. The rats were killed after 4 weeks of feeding for the determination of gastric malondialdehyde (MDA), acid and mucus content. There was a significant decrease in gastric MDA and gastric acid in all the palm vitamin E supplemented groups compared to control. However, these doses of palm vitamin E had no significant effect on gastric mucus. The phase 2 study determined the effect of multiple doses of palm vitamin E and tocopherol on the prevention of aspirin-induced gastric lesions. Fifty rats of the same weight and strain were randomized into seven groups. Group I was fed a normal diet; groups II to IV were fed with a palm vitamin E enriched diet in doses of 60 mg, 100 mg and 150 mg/kg food, respectively; groups V to VII were fed with a tocopherol-enriched diet in doses of 20 mg, 30 mg and 50 mg/kg food, respectively. After 4 weeks of feeding with the respective diets the rats were challenged with a single intra-gastric dose of 400 mg/kg body weight aspirin suspended in propylene glycol. The rats were killed 6 h post-aspirin exposure for the determination of gastric lesion index and gastric parameters as mentioned in the phase I study. The gastric lesions index was significantly lower in all the vitamin E groups compared to control. The lowest ulcer index was observed in the groups that received 100 mg of palm vitamin E and 30 mg tocopherol in the diet. However, there was no significant difference in ulcer indices between palm vitamin E and tocopherol-treated groups. The lower ulcer index was only accompanied by lower gastric MDA content. We conclude that both palm vitamin E in doses of 60 mg, 100 mg and 150 mg/kg food as well as tocopherol in doses of 20 mg, 30 mg and 50 mg/kg food are equally effective in preventing aspirin-induced gastric lesions. The most probable mechanism is through their ability in limiting the lipid peroxidation that is involved in aspirin-induced gastric lesions.     

氦-氖激光对小鼠巨噬细胞、淋巴细胞和中性粒细胞内 非特异性酯酶影响的图像分析研究

目的探讨氦-氖(He-Ne)激光照射对机体免疫功能的影响。方法将小鼠随机分成4组,Ⅰ组为对照组,Ⅱ～ⅣV组为He-Ne激光照射的不同时间组,采用a-茶酚醋酸酯法显示非特异性酯酶,并用图像分析系统对小鼠腹腔巨噬细胞、淋巴细胞和中性粒细胞内非特异性酯酶作定量分析。结果各照射组的三种免疫细胞内非特异性酯酶的各项指标均较对照组差异有非常显著性(P＜0.01),各照射组之间比较,差异也均有非常显著性(P＜0.01)。结论He-Ne激光可激活三种免疫细胞,增强机体免疫力。