Effects of He-Ne laser irradiation on chronic atrophic gastritis in rats

AIM: To study the effects of He-Ne laser irradiation on experimental chronic atrophic gastritis (CAG) in rats.METHODS: Sixty-three male adult Wistar rats were randomly divided into five groups including normal control group, model control group and three different dosages He-Ne laser groups. The chronic atrophic gastritis (CAG)model in rats was made by pouring medicine which was a kind of mixed liquor including 2% sodium salicylate and 30% alcohol down the throat for 8 wk to stimulate rat gastric mucosa, combining with irregular fasting and compulsive sporting as pathogenic factors; 3.36, 4.80, and 6.24J/cm2doses of He-Ne laser were used, respectively for three different treatment groups, once a day for 20 d. The pH value of diluted gastric acid was determined by acidimeter,the histopathological changes such as the inflammatory degrees in gastric mucosa, the morphology and structure of parietal cells were observed, and the thickness of mucosa was measured by micrometer under optical microscope.RESULTS: In model control group, the secretion of gastric acid was little, pathologic morphological changes in gastric mucosa such as thinner mucous, atrophic glands, notable inflammatory infiltration were found. After 3.36 J/cm2 dose of He-Ne laser treatment for 20 d, the secretion of gastric acid was increased (P＜0.05), the thickness of gastric mucosa was significantly thicker than that in model control group (P＜0.01), the gastric mucosal inflammation cells were decreased (P＜0.05). Morphology, structure and volume of the parietal cells all recuperated or were closed to normal.CONCLUSION: 3.36J/cm2 dose of He-Ne laser has a significant effect on CAG in rats.

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.

Morphological and pathologic changes of experimental chronic atrophic gastritis (CAG)and the regulating mechanism of protein expression in rats

Objective： To study the pathologic change and molecular regulation in cell proliferation and apoptosis of gastric mucosa in rats with chronic atrophic gastritis （CAG）, and evaluate the possible mechanisms. Methods： Rats were administered with 60% alcohol or 2% salicylate sodium, 20 mmol/L deoxycholate sodium and 0.1% ammonia water to establish chronic atrophic gastritis （CAG） models. The gastric specimens were prepared for microscopic view with hematoxylin and eosin （H-E） and alcian blue （A-B） stain. The number of infiltrated inflammatory cells, the thickness of the mucosa gland layer （μm） and the number of gastric glands were calculated. The damage of barrier in mucosa with erosion or ulceration, and the thickness of mucin were examined by scanned electron microscope （SEM）. The levels of PGE2, EGF （epiderminal growth factor） and gastrin in the serum were measured with radioimmunoassay or ELISA method. The immunohistochemistry method was used to observe the number of G cells, the expression of protein of EGFR （EGF receptor）, C-erbB-2, p53, p6 and bcl-2 in gastric tissue. Results： Under SEM observation, the gastric mucosa was diffused erosion or ulceration and the thickness of mucin was decreased. Compared with normal rats, the grade of inflammatory cell infltration in CAG rats was elevated, whereas the thickness and number of gastric gland were significantly lower （P〈0.05）. Compared with normal level of （0.61±0.28） μg/L, EGF in CAG （2.24±0.83） μg/L was significantly higher （P〈0.05）. The levels of PGEz and gastrin in serum were significantly lower in CAG rats than that in normal rats （P〈0.05）. Immunohistochemistry detection showed that the number of G cell in antrum was lower in CAG group （P〈0.05）. Imrauno-stain showed EGFR protein expression in the basal and bilateral membrane, and the cytoplasma in atrophic gastric gland, while negative expression was observed in normal gastric epithelial cells. Positive staining of p53 and p 16 protein was localized in the nucleus of epithelial cells. The former was higher positively expressed in atrophic gland, while the later was higher positively stained in normal gastric tissue, bcl-2 protein was positively stained in the cytoplasma in atrophic gastric gland, while very weakly stained in normal gastric tissue. Conclusion： The pathological findings in gastric gland accorded with the Houston diagnostic criteria of antrum-predominant CAG. CAG in rats was related with the damage of barrier in gastric mucosa and the misbalance of cell proliferation and apoptosis. There was high protein expression of oncogene, while inhibitor of suppressor gene in CAG rats indicated high trend of carcinogenesis.

红外线、He-Ne激光照射对CAG大鼠胃酸的影响

目的:探讨红外线、He-Ne激光对慢性萎缩性胃炎(CAG)大鼠胃酸的影响。方法:将63只成年雄性Wistar大鼠随机分成正常组、模型组,红外线组及各激光照射组。应用2%水杨酸钠和30%酒精的混合溶液灌胃8周,刺激大鼠胃粘膜,并结合劳累、饥饱失常等多因素方法建立大鼠CAG模型,照射组在建模完成后,分别给予红外线、不同剂量的He-Ne激光照射,每日一次。照射20天后,观察各组大鼠胃酸的变化。结果:红外线组及3.36J/cm2的He-Ne激光组与模型组比较,胃酸分泌明显增多。结论:红外线及3.36J/cm2的He-Ne激光照射能够促进CAG大鼠的胃酸分泌,对大鼠CAG有较好的治疗作用。

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。

The Effect of Laser Acupuncture on the Levels of IL-2,IL-6 and TGF-β1in Serum of Rats with Atrophic Gastritis

Objective： To study the effect of three different methods such as medicine, acupuncture and laser acupuncture on the levels of interleukin 2 （IL-2）, inter- leukin 6 （IL-6） and transforming growth factor-β1 （TGF-β1） in rat＇s serum with chronic atrophic gastritis. Methods： 9 rats were randomly selected from 60 rats as normal con- trol group, and the other rats were used to replicate the animal model of chronic atrophic gastritis with comprehensive method, 5 rats were randomly inspected at the 8th week in the process of creating model for gastric mucosa pathological examination; when gastric mucosa shows CAG symptoms such as various degree of congestion, bleeding, atrophy, metaplasia, the model rats were randomly divided into model group, medicine group, acupuncture group and laser acupuncture group. The rats of medicine group were chron- ically administered with yanshenjianwei capsule and Kangfuxin Liquid; the groups of acupuncture and laser acupuncture selected Zusanli acupuncture as acupuncture points, after the treatment for 14 d, blood was removed, double antibody sandwich en- zyme linked immunosorbent assay （ELISA） was used to detect the levels of IL-2, IL-6 and TGF-β1 in serum. Results： Compared with normal group, the contents of IL-2, IL-6 and TGF-β1 in serum of model rats increased （P〈0.05 or P〈0.01）. Medicine, acupuncture and laser acupuncture could reduce the contents of IL-2, IL-6 and TGF-β1, IL-2 in serum of the medicine group and laser acupuncture group was signifi- cantly decreased （P〈0.05）; IL-6 in acupuncture group and laser acupuncture group were significantly decreased （P〈0.05 or P〈0.01）;and the most significant is laser acupuncture group （P〈0.01）. Medicine, acupuncture and laser acupuncture could significantly reduce TGF-β 1 content in serum （P〈0.05 or P〈0.01）, and the particularly significant was laser acupuncture（P〈0.01）. Conclusion： Laser acupuncture has the function of reducing the inflammatory response and adjusting immune function. It earl effectively reduce the ex- pression level of IL-2, IL-6 and TGF- β1 in serum of rats with chronic atrophic gastri- tis, and its effects are better than traditional acupuncture and medicine.

红外线、氦氖激光照射对慢性萎缩性胃炎(CAG)大鼠血液流变恢复的影响

目的 探讨红外线、激光照射对慢性萎缩性胃炎 (CAG)大鼠的血液流变的影响。方法 复制大鼠CAG动物模型 ,并设置正常组和模型组对照 ,采用不同强度的He Ne激光、红外线分别照射CAG大鼠胃部。对大鼠的全血和血浆的血液粘度进行了观测比较。结果 CAG模型组与正常对照组大鼠的血液流变有显著性差异 ,而治疗中的激光组和红外线组与模型组血液流变也均有明显差异。结论 患有CAG的大鼠其血液流变将发生改变。经过红外线、激光照射治疗 ,随着病情的好转 ,其血液流变学指标也大有改善 ,趋于正常。

中药复方清化饮对慢性萎缩性胃炎大鼠血清IL-10、NO、GAS及血浆MTL的影响

目的探讨中药复方清化饮对大鼠慢性萎缩性胃炎(CAG)胃黏膜病理与血清白细胞介素-10(IL-10)、一氧化氮(NO)、胃泌素(GAS)及血浆胃动素(MTL)的影响。方法将53只Wistar大鼠随机分为空白组8只和CAG造模组45只,予建立病证结合CAG大鼠模型。抽检大鼠确认造模成功后,将CAG造模组余下40只大鼠随机分为模型组、维酶素组、中药低、中、高剂量组各8只。予相应药物干预30d后处死大鼠,腹主动脉取血并留取胃组织,分析各组大鼠胃黏膜病理与血清IL-10、NO、GAS及血浆MTL浓度。结果与空白组比较,模型组大鼠见不同程度的胃黏膜萎缩,血清IL-10、GAS浓度降低,血清NO、血浆MTL含量升高(P<0.01)。与模型组比较,清化饮可不同程度改善胃黏膜病理情况,升高血清IL-10、GAS浓度,降低血清NO、血浆MTL含量(P<0.05或P<0.01),且高剂量组疗效更为显著(P<0.01)。结论中药复方清化饮可调控血清IL-10、NO、GAS及血浆MTL的表达失衡,有效逆转CAG大鼠胃黏膜病变。

表皮生长因子对大鼠早期萎缩性胃炎形成的干预作用

目的 探讨表皮生长因子 (EGF)对大鼠早期胃粘膜萎缩的干预作用。 方法 将15只大鼠平均分为3组 ,均给予三联致萎缩因素 (60%酒精、20mmol/L去氧胆酸钠、0.1%氨水 )灌胃 ,1组加EGF10μg/kg隔日皮下注射共24周 ,另1组加2ml注射用水 ,隔日皮下注射共24周作为对照。观察3组大鼠胃大体标本及组织学变化。结果 加EGF者与其他两组比 ,胃窦、胃体部炎症程度降低 ,固有层厚度增高 ,固有腺面积百分比和胃体部固有腺中壁细胞数增多。 结论

胃萎清对慢性萎缩性胃炎大鼠胃黏膜超微结构的影响

目的:通过观察慢性萎缩性胃炎(CAG)大鼠胃黏膜腺上皮主细胞、壁细胞超微结构的变化,探讨健脾清热活血中药胃萎清对CAG大鼠胃黏膜超微结构的影响,初步揭示胃萎清对CAG的作用机制。方法:将CAG大鼠随机分为6组:对照组、模型组、胃萎清高、中、低剂量组及叶酸组。以N-甲基-N'-硝基-N'-亚硝基胍(MNNG)合饥饱失常法建立CAG大鼠模型,观察各组大鼠胃黏膜超微结构的变化。结果:与对照组比较,模型组大鼠胃黏膜主细胞核固缩,胞浆中出现大量空泡样变;壁细胞染色质浓缩,线粒体嵴数量减少。与模型组比较,胃萎清高、中剂量组大鼠胃黏膜主细胞核仁结构尚均一,粗面内质网基本整齐;壁细胞核质比较规则,线粒体嵴增多。胃萎清低剂量组大鼠胃黏膜主细胞细胞核核仁形态较模型组规则;壁细胞细胞核形态改变,线粒体数量减少。叶酸组大鼠胃黏膜主细胞细胞核染色质较正常,胞浆出现空泡样变;壁细胞染色质固缩,线粒体嵴数量较模型组多。结论:胃萎清能在一定程度上改善胃黏膜腺上皮主细胞、壁细胞的超微结构,推测胃萎清能改善CAG患者不适症状的机制之一可能是改善胃黏膜超微结构。

加味当归芍药散对慢性萎缩性胃炎大鼠JAK2/STAT3信号通路的影响

目的探讨加味当归芍药散对慢性萎缩性胃炎(CAG)大鼠JAK2/STAT3信号通路的影响。方法将60只SD大鼠随机分为正常组和造模组,采用N-甲基-N’-硝基-N-亚硝基胍(MNNG)复合法建立CAG大鼠模型;将造模成功的大鼠随机分为模型组、摩罗丹组(0.5 g·kg^(-1))和加味当归芍药散高、中、低剂量组(16、8、4 g·kg^(-1)),每组10只;灌胃给药,每日1次,连续8周。采用HE染色法观察大鼠胃黏膜组织病理变化;ELISA法检测胃黏膜组织中白细胞介素6(IL-6)、肿瘤坏死因子α(TNF-α)的含量;Real-time PCR法检测胃黏膜组织JAK2、STAT3 mRNA表达水平;Western Blot法检测胃黏膜组织JAK2、p-JAK2、STAT3、p-STAT3蛋白表达水平;免疫组化法检测胃黏膜组织中Bcl-2、Bcl-xl、Bax、BAD蛋白表达水平。结果与正常组比较,模型组大鼠胃黏膜萎缩明显;胃黏膜组织中的IL-6、TNF-α含量显著升高(P<0.01);STAT3 mRNA表达水平显著升高(P<0.01);p-JAK2/JAK2、p-STAT3/STAT3值显著升高(P<0.01);Bax、Bad蛋白表达水平显著升高(P<0.01),Bcl-2、Bcl-xl蛋白表达水平显著降低(P<0.01)。与模型组比较,当归芍药散给药组大鼠的胃黏膜萎缩明显改善;胃黏膜组织中的IL-6、TNF-α含量明显降低(P<0.05,P<0.01);STAT3 mRNA表达显著下调(P<0.01);p-JAK2/JAK2、p-STAT3/STAT3值显著降低(P<0.01);Bax、Bad蛋白表达水平显著降低(P<0.01),Bcl-2、Bcl-xl蛋白表达水平显著升高(P<0.01)。结论加味当归芍药散能够明显改善CAG大鼠的胃黏膜萎缩状态,可能与下调JAK2/STAT3信号通路,减少炎症因子生成及细胞凋亡有关。

健胃消胀片对慢性萎缩性胃炎大鼠胃黏膜病理及超微结构的影响

目的评价健胃消胀片对慢性萎缩性胃炎大鼠胃黏膜超微结构改变的影响。方法以110只SPF级SD雄性大鼠为研究模型,随机选取10只为正常组,剩余100只进行造模,并随机分为正常组、模型组、对照组(即胃复春组)和健胃消胀片底、中、高剂量6组。除正常组常规饲养管理外,其余各组每天以脱氧胆酸钠、水杨酸钠交替灌胃并以MNNG作为饮用水造慢性萎缩性胃炎(CAG)模型,连续12周。在实验大鼠造模第5周,胃复春组(剂量:1.0 g/kg)和健胃消胀片低、中、高剂量组(剂量:0.5 g/kg、1.0 g/kg和2.0 g/kg)开始灌胃给药,其余各组予2 m L生理盐水灌胃,给药7周,第12周末取材,并对胃黏膜进行HE染色观察和扫描电镜观察。结果造模7周后动物均出现毛松、光泽偏黄、进食量及活动量减少、大便溏薄等症状;第12周,模型组大鼠死亡率较高,体重减轻明显。电镜扫描结果显示,正常组胃黏膜上皮细胞排列整齐,细胞间隙无增宽;模型组胃黏膜上皮细胞见坏死,巨噬细胞粘附,上皮细胞间隙明显变宽,胃小凹开口变大;随着健胃消胀片剂量的上升,各组胃黏膜上皮细胞坏死程度逐渐减轻直至无坏死,细胞间隙和胃小凹开口逐渐恢复正常,最终未见炎性细胞粘附。病理结果提示模型组大鼠胃黏膜表现符合重度CAG改变,治疗后各治疗组死亡率均显著低于模型组(P<0.05),死亡率由低到高顺序为0.00%(正常组)、29.4%(高剂量组)、31.3%%(低剂量组)、35.3%(对照组)、41.2%(中剂量组)、72.2%(模型组)。结论胃复春与健胃消胀片对实验性CAG大鼠的胃黏膜均有一定的保护作用,其中健胃消胀片高剂量组(相当于临床用量26.7倍)的作用最明显。

激光针灸治疗大鼠慢性萎缩性胃炎实验研究

目的观察激光针灸对大鼠慢性萎缩性胃炎的治疗作用,为临床应用提供实验依据。方法 60只Wistar大鼠随机分为正常对照组、模型对照组、给药组、针刺组和激光针灸组5组,采用复合法复制大鼠慢性萎缩性胃炎模型,分别给予药物灌胃、针刺和激光针灸治疗14d,观察各组大鼠外观、胃黏膜状态及病理组织学变化。结果模型对照组大鼠体质量较正常对照组显著降低(P<0.01),胃扩张,胃黏膜变薄(P<0.05),腺体萎缩或消失,炎性细胞浸润;治疗后各组大鼠状态均有好转,激光针灸组疗效尤为显著,未见胃扩张,胃黏膜厚度较模型对照组明显增加(P<0.05),细胞结构、形态正常,腺体排列规整,无腺体萎缩现象。结论激光针灸可明显改善慢性萎缩性胃炎大鼠外观、胃黏膜状态及病理形态学表现,疗效优于给药和针刺。