低剂量率裂变中子长期照射对血清中超氧化物歧化酶和丙二醛的影响

目的 探讨低剂量率裂变中子长期照射对血清总超氧化物歧化酶(SOD)和丙二醛(MDA)的影响.方法 80只SD雄性大鼠按数字表法随机分成对照组和照射组,照射组每天用低剂量率(252Cf,吸收剂量率0.35 mGy/h)裂变中子照射20.5 h,在照射的第28、42、56、70天及停止照射后35 d各取8只大鼠,眼球取血分离血清,用化学比色法测定血清中总SOD活性和MDA含量.结果 与同一时间点对照组血清总SOD活性[(94.19±11.94)×103 U/L]比较,累积剂量为0.3 Gy的照射组血清总SOD活性[(68.75±8.07)×103 U/L]明显下降(P<0.01),其他剂量点与同一时间对照组比较差异无统计学意义(P>0.05).各个剂量点MDA与对照组相比较,差异均无统计学意义(P>0.05).结论 低剂量率(0.35 mGy/h)裂变中子长期照射对雄性大鼠SOD活性和MDA含量无明显影响.

Abstract：

Objective To study the effects of low dose rate netron exposure on the serum superoxide dismutase (SOD) and malondialdehyde(MDA).Methods Eighty male SD rats were randomly divided into the experimental and the control groups. Rats in the experimental group were exposed to 252Cf neutron at 0.35 mGy/h for 20.5 hours. On the 28th, 42nd, 56th, and 70th days during exposure and also 35 days after exposure, 8 rats were chosen from each group and the serum samples were collected to measure the activity of SOD and the content of MDA by colorimetric method.Results When compared with the control group[(94.19±11.94)×103 U/L]on the same day, the activity of serum superoxide dismutase (SOD) in the experimental group with an accumulated low dose rate of 0.3 Gy[(68.75±8.07)×103 U/L] decreased evidently (P<0.01). However, no statistical significance could be seen, when a comparison was made with that of the control group, at any check points (P>0.05). And there was also statistical difference in the contents of MDA at any check points, when a comparison was made between the two groups (P>0.05).Conclusions Our study indicated that prolonged exposure to low dose rate neutron (0.35 mGy/h) had no significant effects on the activity of serum SOD and the content of serum MDA in rats.     

高压氧治疗对肛肠病术后创面愈合的疗效观察

目的 观察高压氧对肛肠病术后创面修复及组织水肿的影响,并探讨其作用机制.方法 将120例肛肠病术后患者根据知情同意原则分为常规治疗组、中药熏治组、高压氧治疗组、常压氧治疗组,每组30人.术后所有患者常规口服抗生素,每天局部换药.术后第1天起常规治疗组不再给予其他干预方式;中药熏治组:给予肛肠Ⅰ号洗液(川椒、艾叶、双花等煎汤取液)坐浴,1次/d,每次15 min,连续15 d;常压氧治疗组:每天常压下吸氧1次,每次60 min,连续15 d;高压氧组:每天给予高压氧治疗1次,0.2 MPa(2.0 ATA)下稳压吸氧60 min,连续15 d.分别记录创面的红活率、愈合速度、愈合时间和组织的消肿情况.结果 高压氧组肛肠病术后创面水肿情况[(0.13±0.51)分],与其他组[(0.81±0.67)～(1.52±0.84)分]比较明显改善(P<0.01),创面愈合时间[(14.30±3.22) d]缩短,与对照组[(17.28±4.34)d]比较,差异有统计学意义(P<0.01).结论 高压氧可以加快肛肠病术后组织消肿,促进创面溃疡愈合.

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Objective To observe the effect of HBO on anorectal wound healing following surgery and tissue edema, and also to explore the mechanism involved.Methods One hundred and twenty anorectal patients were randomly divided into 4 groups: the conventional therapy group, the Chinese medicinal herbal fumigation treatment group, the HBO treatment group, the normobaric oxygen therapy group, each consisting of 30 patients. After surgery, all the patients had oral antibiotics and changed dressings every day. One day after surgery, the conventional therapy group was not intervened any longer. For the Chinese medicinal herbal fumigation treatment group, the patients had sitting baths with No. 1 anorectal fluid (a fluid preparation with Chinese medicinal herbs), once a day, once for 15 min and for a succession of 15 days. Patients in the normobaric oxygen therapy group had normobaric oxygen breathing at normal pressure, once a day, once for 60 min and also for a succession of 15 days. Patients in the HBO therapy group exposed to 0.2 MPa HBO once a day, once for 60 min and also for a succession of 15 days. Then, survival rate of the red wound surface, healing rate and the repercussion of tissues were observed and recorded.Results For patients in the HBO therapy group, swelling in the wound surface (0.13±0.51)after anorectal surgery improved significantly(P<0.01), time of wound healing was shortened(14.30±3.22)d, and significant differences could be seen, when a comparison was made with the conventional therapy group (17.28±4.34)d (P<0.01).Conclusions HBO could hasten the repercussion of tissues following anorectal surgery and improve the healing of would surface.     

高压氧治疗兔创伤性脑损伤的磁共振观察

Objective To observe the effects of HBO therapy on cerebral edema, blood-brain barrier and neural behavioral scores, induced by brain trauma injury in rabbits with magnetic resonance imaging ( MRI). Methods Twenty-four rabbits were randomly divided into three groups: the sham operation group (n =5), with a skull window of only 8 mm in diameter; the control group (n = 10) , sustained with shock injury (shock intensity of 0.2 Mpa) following skull fenestration; the HBO group(n=90), also sustained with shock injury following skull fenestration, but with HBO treatment. Following the development of the model, MRI scans were made at 6th, 24th, 72nd, and 120th hours to calculate the volume of cerebral edema, apparent diffusion coefficient ( ADC), and neurological behavioral scores. Results After HBO treatment, neurological behavioral scores of the HBO group improved significantly, when compared with that of the control group (P＜ 0. 05). MRI showed that abnormality was not noted in the sham operation group. Before treatment, significant cerebral edema and damage of blood-brain barrier could be seen in both the HBO group and the control group. However, following HBO treatment, cerebral edema and blood-brain barrier damage of the HBO group recovered more rapidly, when a comparison was made between the groups (P＜0. 01) and ADC value of the HBO group was lower than that of the control group (P＜0. 05). Conclusions HBO could hasten recovery of the blood-brain barrier damage induced by cerebral damage with hydraulic impetus, reduce cerebral edema, significantly decrease symptoms of brain injury, and reduce disability rate.     

深低温对全脑缺血大鼠海马线粒体功能的影响

目的 研究深低温对全脑缺血大鼠海马线粒体功能的影响,并探讨其在深低温脑保护机制中的作用.方法 建立大鼠体外循环模型,实验动物按随机数字表法分成对照组(8只)、常温缺血组(8只)和低温缺血组(8只).提取海马组织线粒体,观察线粒体呼吸功能、线粒体琥珀酸脱氢酶(succinate dehydrogenase,SDH)、细胞色素氧化酶(cytochrome oxidese,CCO)活性、线粒体膜流动性、线粒体内游离Ca2+和丙二醛(MDA)含量的变化.结果 常温缺血组线粒体Ca2+与MDA含量均较对照组显著升高(P<0.01),而低温缺血组Ca2+与MDA含量较常温缺血组显著降低(P<0.05).常温缺血组呼吸Ⅲ态(R3)、呼吸Ⅳ态(R4)、磷氧比(P/O)及氧化磷酸化效率(OPR)均较对照组显著降低(P<0.05).低温缺血组R3、R4、P/O、OPR均较常温缺血组显著回升(P<0.05).常温缺血组线粒体膜流动性较对照组显著降低(P<0.01),而低温缺血组膜流动性较常温缺血组显著升高(P<0.05).常温缺血组线粒体SDH与CCO活性均较对照组显著降低(P<0.01),而低温缺血组SDH与CCO活性均较常温缺血组显著升高(P<0.05).结论 深低温对全脑缺血大鼠海马线粒体功能具有保护作用.

Abstract：

Objective To detect the effect of deep hypothermia on the function of mitochondria in hippocampus after global ischemia in rats and to explore the protection mechanism. Methods The animal model of cardiopulmonary bypass (CPB) was established in rats that were then randomly divided into three groups,ie,control group,normothermia ischemia group and hypothermia ischemia group,eight rats per group.The mitochondria was extracted from the hippocampus of each rats for observing the mitochondrial respiratory function,the activities of succinate dehydrogenase (SDH),the cytochrome oxidese(CCO),the lnembrane fluidity and the content of intramitochondria free calcium and MDA. Resuits The content of intramitochondria free calcium and MDA in the normothermia ischemia group was increased significantly compared to the control group and that in the hypothermia ischemia group wag decreased significantly compared with the normothermia ischemia group(P<0.05).Respiratory state Ⅲ (R3),respiratory state IV(R4),P/O ratio and oxidative phosphorylation (OPR) in the normothermia ischemia group were decreased significantly compared to the control group (P<0.05).R3,R4,P/O ratio and OPR in the hypothermia ischemia group were increased significantly compared with the normothermia ischemia group (P<0.05).Membrane fluidity in the normothermia ischemia group wag decreased significantly compared to the control group (P<0.01),while that in the hypothermia ischemia group was increased significantly compared with the normothermia ischemia group(P<0.05).The activities of SDH and CCO in the normothermia ischemia group were decreased significantly compared to the control group (P<0.01),while those in the hypothermia ischemia group were increased significantly compared with the normothermia ischemia group (P<0.05). Conclusion Profound hypothermia exerts a protective effect on the function of mitochondria in the hippocampus after global ischemia in rats.     

THE EFFECT OF MEBT/MEBO ON EPIDERMAL REGENERATIVE STEM CELLS

INTRODUCTION 　　As an innovative therapeutic system in burn therapy, Moist exposed burn therapy (MEBT) has been in wide clinical practiced in association with the topical drug of Moist Exposed Burn Ointment (MEBO). It successfully resolved four major clinical problems, i.e. pain, wound infection, progressive necrosis, and healing with scar formation of deep second-degree burn wound. Recently, a new progress, the regeneration and replication of skin tissue in the subcutaneous fat tis…     

Intervention of Astragalus membranaceus on radioactive lung injuries and influence on TNF-α and ET expression

Objective To observe the lung protection of Astragalus membranaceus against radiotherapy to intermediate-stage and terminal thoracic neoplasm, and its influence on TNF-α and ET expression.Methods The patients with intermediate-stage and terminal thoracic neoplasm under radiotherapy were divided into a treatment group and a control group.Patients in the treatment group took 10 ml of Asragalus membranaceus twice a day.for consecutive 6 months from the beginning of radio therapy.TNF-α and ET in the plasma were measured before and after the radiotherapy.The clinical symptom,iconographic changes and lung diffusion were observed from the 15th day of radiotherapy.Results The TNF-α and ET in plasma afterthe radiotherapy were(2.48±0.75)as/ml and(69.32±23.03)pg/ml for the treatment group,and(5.12±1.01)ns/ml and(97.87±37.83)pg/ml for the control group with the statistial difference(x2=7.49,6.57,P<0.001).The decrease of CO diffusion 5 and 10 months after the radiotherapy in the treatment group was statistically different compared with that in the control group(x2=3.98,3.78,P<0.05).There was a statistical difference of the incidence of acute radiation pneumonitis and pulmonary fibrosis between these two groups(P<0.05).Conclusions Astragalus membranaceus could inhibit the excess expression of TNF-α and ET in plasma and reduce the deterioration of diffusion after radiotherapy,so that it can be used for intervention of lung injuries from radiotherapy.     

重型颅脑创伤后脑疝伴失血性休克救治策略

Objective To explore emergency treatment strategies for the patients with brain hernia combined with hemorrhagic shock after severe traumatic brain injury and their effect on prognosis.Methods A retrospective analysis was made on 54 patients (study group) with brain hernia combined with hemorrhagic shock treated with selective treatment strategies from May 2006 to May 2009. Another 48 patients with the same injuries treated with no selective treatment strategies from April 2003 to April 2006 were used as control group. The mortality within one week and the GOS six months after injury were compared in two groups. Results There was no statistical difference in aspects of sex, age, injury mechanism, GCS and blood loss in both groups (P＞0.05). Thirteen patients died in the study group within the first week, with mortality rate of 24.1%. While 16 patients died in the control group at the first week, with mortality rate of 33.3% (P＜0.05). GOS half year after injury in the study group was better than that in the control group (P＜0.05).Conclusion Early selective treatment strategy based on degree of shock may obtain better outcome for patients with brain hernia combined with hemorrhagic shock after severe brain injury.     

重型颅脑创伤后脑疝伴失血性休克救治策略

Objective To explore emergency treatment strategies for the patients with brain hernia combined with hemorrhagic shock after severe traumatic brain injury and their effect on prognosis.Methods A retrospective analysis was made on 54 patients (study group) with brain hernia combined with hemorrhagic shock treated with selective treatment strategies from May 2006 to May 2009. Another 48 patients with the same injuries treated with no selective treatment strategies from April 2003 to April 2006 were used as control group. The mortality within one week and the GOS six months after injury were compared in two groups. Results There was no statistical difference in aspects of sex, age, injury mechanism, GCS and blood loss in both groups (P＞0.05). Thirteen patients died in the study group within the first week, with mortality rate of 24.1%. While 16 patients died in the control group at the first week, with mortality rate of 33.3% (P＜0.05). GOS half year after injury in the study group was better than that in the control group (P＜0.05).Conclusion Early selective treatment strategy based on degree of shock may obtain better outcome for patients with brain hernia combined with hemorrhagic shock after severe brain injury.     

Intervention of Astragalus membranaceus on radioactive lung injuries and influence on TNF-α and ET expression

Objective To observe the lung protection of Astragalus membranaceus against radiotherapy to intermediate-stage and terminal thoracic neoplasm, and its influence on TNF-α and ET expression.Methods The patients with intermediate-stage and terminal thoracic neoplasm under radiotherapy were divided into a treatment group and a control group.Patients in the treatment group took 10 ml of Asragalus membranaceus twice a day.for consecutive 6 months from the beginning of radio therapy.TNF-α and ET in the plasma were measured before and after the radiotherapy.The clinical symptom,iconographic changes and lung diffusion were observed from the 15th day of radiotherapy.Results The TNF-α and ET in plasma afterthe radiotherapy were(2.48±0.75)as/ml and(69.32±23.03)pg/ml for the treatment group,and(5.12±1.01)ns/ml and(97.87±37.83)pg/ml for the control group with the statistial difference(x2=7.49,6.57,P<0.001).The decrease of CO diffusion 5 and 10 months after the radiotherapy in the treatment group was statistically different compared with that in the control group(x2=3.98,3.78,P<0.05).There was a statistical difference of the incidence of acute radiation pneumonitis and pulmonary fibrosis between these two groups(P<0.05).Conclusions Astragalus membranaceus could inhibit the excess expression of TNF-α and ET in plasma and reduce the deterioration of diffusion after radiotherapy,so that it can be used for intervention of lung injuries from radiotherapy.     

重组人白细胞介素-11和姜黄素对中子照射致小鼠肠道损伤的治疗作用

Objective To explore the therapeutic effect of recombinant human interleukin(rhIL-11) and curcumin on jejunal damage in mice after neutron irradiation.Methods 140 male BALB/c mice were randomly divided into 4 groups:20 mice in healthy control group,60 mice in mere irradiation group,30 mice in IL-11 treatment group and 30 mice in curcumin treatment group.The mere irradiation group mice were wholly exposed to 3 Gy neutron irradiation.The treatment groups mice were intraperitoneally enterocoelia once a day for 5 d after irradiation.The mortality of the mice were observed.The mice in the control and mere irradiation groups were killed 6 h,1,3,and 6 d post-irradiation,respectively,and the mice of the 2 treatment groups were killed 3 and 6 d post-irradiation,respectively and the samples of jujunum were colleted.HE staining,argyrophilic of nucleaolar organizer regions staining,Feulgen staining,and image analysis were used to observe the pathology and levels of argyrophilic proteins and DNA.Results The mice in the mere irradiation group all died at 5 d post-irradiation,while 2 mice in the IL-11 treatment group and 3 in the curcumin group survived.Large area necrosis and exfoliation were found in the intestinal epithelial mucosa of the mere irradiated group mice since 6 h to 3 d after irradiation.Crypt cell regeneration was seen occasionally found 3 days later and much more 5 days later.Crypt cell regeneration was obviously found in the intestinal epithelial mucosa and lots of new villi were observed 5 d after irradiation in both treatment groups,however,the amounts of crypt cells and new villi of the curcumin treatment group were less than those of the IL-11 treatment group.The contents of AgNOR and DNA in the intestinal epithelial cells 5 days after irradiation of the 2 treatment groups were all significantly higher than those of the mere irradiation group (F = 0.015-0.035,all P ＜ 0.05) but without significant differences between them.Conclusions Jejunal damage in mice could be induced after 3 Gy neutron irradiation.rhIL-11 and curcumin might reduce the damage and promote the regeneration and repair of the intestinal epithelium.     

选择性肠道去污染对创伤性截瘫家兔小肠组织MDA含量和SOD、GSH-Px的影响

目的探讨选择性肠道去污染(selective decontamination of the digestive tract,SDD)对创伤性截瘫家兔肠道组织丙二醛(malondialdehyde,MDA)含量和超氧化物歧化酶(superoxide dismutase,SOD)、谷胱甘肽过氧物酶(glutathione peroxidase,GSH-Px)的影响,明确SDD对截瘫家兔肠道氧化应激损伤的保护作用。方法建立截瘫家兔模型。选择40只体质量为2.0~2.5kg 6月龄清洁级健康家兔,雌雄不限,随机分为处理组和对照组,每组20只;另外增加正常对照组家兔10只。采用PTA方案[多粘菌素E(P)、妥布霉素(T)和两性霉素B(A)]进行SDD处理4d。4d后处死家兔,采集距回盲部5cm左右小肠标本进行HE染色观察小肠黏膜变化,并检测小肠组织MDA含量和SOD、GSH-Px水平。结果 SDD处理组小肠组织MDA水平较对照组明显降低[(3.58±0.98)nmo L/mgprot vs.(8.19±1.22)nmo L/mgprot,P0.001];处理组SOD活性明显高于对照组[(57.2±9.4)U/mgport vs.(42.7±13.4)U/mgport,P0.001];处理组GSH-Px活性也明显高于对照组[(111.6±12.0)U/mgport vs.(89.7±11.0)U/mgport,P0.001]。相关分析表明,小肠HE染色Chiu病理评分与小肠组织MDA含量呈显著正相关(P0.001,r=0.649),与SOD(r=-0.387)、GSHPx(r=-0.531)活性呈显著负相关(P0.001)。结论 SDD处理截瘫家兔后可减弱肠道脂质过氧化反应,减轻氧化应激损伤,从而保护肠黏膜。     

酚妥拉明和地塞米松对吸入性损伤大鼠肝脏损伤的保护作用及机理

目的　观察酚妥拉明和地塞米松对重度吸入性损伤大鼠肝脏损害的保护作用及机制。方法　将 72只大鼠随机分为A、B、C 3组。对照组 (C组 )腹腔注射生理盐水 ,A组腹腔注射酚妥拉明 ,B组腹腔注射地塞米松。另取 6只非致伤大鼠做伤前值测定 ,再取 6只致伤大鼠 ,伤后 30分钟做伤后值测定。结果　C组谷丙转氨酶 (GPT)、总胆红素 (TBIL)、丙二醛 (MDA)、MDA/超氧化物歧化酶 (SOD)及组织含水量 (WCT)均明显增高 ,组织中一氧化氮 (NO)水平较伤前值变化不大 ,SOD、ATP水平降低。A组和B组中TBIL、GPT、MDA、MDA/SOD、NO明显低于C组 (P <0 .0 1 ) ,A组ATP和SOD明显高于C组 (P <0 .0 1 ) ;B组SOD高于C组 (P<0 .0 1 ) ,B组的ATP则与C组差别不显著 (P >0 .0 5 ) ,B组肝组织含水量低于对照组 (P <0 .0 1 )。结论　酚妥拉明与地塞米松均可能通过调节机体的NO水平进而提高机体抗氧化能力和能量代谢 ,从而对重度吸入性损伤后大鼠的肝脏起保护作用。在改善能量供应和降低MDA方面酚妥拉明效果优于地塞米松     

金丝桃苷对大鼠脑缺血再灌注氧化应激损伤的影响

目的 探讨金丝桃苷（Hyperin，Hyp）对大鼠局灶性脑缺血再灌注氧化应激损伤的影响。方法 （1）模型制备：采用线栓法制备大鼠大脑中动脉缺血模型，缺血2h再灌注。（2）抗氧化实验：40只大鼠随机分成假手术组、模型组、Hyp低剂量组和高剂量组，每组10只。给药组术前连续ig5d，于末次给药30min后行手术。造模24h后检测大鼠脑组织的超氧化物岐化酶（SOD）活性和丙二醛（MDA）含量。（3）病理组织学实验：另取40只大鼠分组和治疗同上，造模24h后，进行神经行为学评分，光镜下观察脑梗死部位病理学改变。结果与模型组比较，神经行为学评分明显降低（P〈0．01）；Hyp—L、Hyp—S剂量组SOD活性均明显提高（P〈0．01），且两组的MDA含量也显著降低（P〈0．05）；镜下观察给药组多数神经元结构较完整，形态相对正常，细胞及间质水肿减轻。结论 Hyp对大鼠局灶性脑缺血再灌注氧化应激损伤有明显保护作用。     

活血生肌类中药对大鼠急性骨骼肌钝挫伤后氧化应激的影响

目的:观察活血生肌类中药对大鼠骨骼肌钝挫伤后组织修复过程中氧化应激的影响。方法:72只雄性SD大鼠随机分为中药治疗组、生理盐水组、自然愈合组,每组24只。采用打击装置造成大鼠右侧腓肠肌中段钝挫伤模型,分别于各组损伤局部注射黄芪丹参注射液、生理盐水和不作处理。另6只作为空白对照(未经任何处理)。于损伤后1、4、7和14天取大鼠腓肠肌测定丙二醛(MDA)含量和过氧化氢酶(CAT)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-px)活性。结果:与生理盐水组和自然愈合组相比,中药治疗组腓肠肌SOD、GSH-px活性在伤后第4、7天显著升高(P<0.05),而CAT活性无明显变化(P>0.05)。中药治疗组腓肠肌MDA含量在伤后第4、7天显著低于生理盐水组和自然愈合组(P<0.05)。结论:活血生肌类中药可明显减轻骨骼肌钝挫伤愈合过程中的氧化性损伤,并显著提高骨骼肌SOD和GSH-px的活性。     

MEBT/MEBO治疗阴茎阴囊皮肤软组织挫裂伤的体会

目的：观察应用烧伤湿性医疗技术(MEBT／MEBO)治疗阴茎阴囊皮肤软组织挫裂伤的临床效果。方法：将68例阴茎阴囊皮肤软组织挫擦伤患者分为二组，治疗组36例用MEBT／MEBO治疗，对照组32例用高效碘，(络合碘)治疗，组间对比观察创面愈合方式、时间和瘢痕生长情况，止痛效果，创面感染发生率，性功能保留情况及药物副作用。结果：MEBT／MEBO治疗阴茎阴囊皮肤软组织挫伤，创面自然愈合时间短并瘢痕少，止痛效果好，创面感染发率低，性功能保留较好，无明显的药物副作用。结论：MEBT／MEBO是一种治疗阴茎阴囊皮肤软组织挫裂伤的最佳方法。     

高温高湿环境下热习服犬肢体火器伤后SOD、MDA含量变化的实验研究

为研究高温高湿环境下热习服犬肢体火器伤后超氧化物歧化酶(SOD)、丙二醛(MDA)含量变化情况,将18只犬随机分为热习服组、常温常湿组、高温高湿组,分别在火器致伤前、后不同时间点检测伤道肌组织中SOD、MDA含量。结果发现,热习服组和高温高湿组中MDA含量均在伤后lh开始升高,其中前者升高幅度明显低于后者,前者达峰值时间为10h,较后者推迟4h且峰值减低(P＜0．05),18h后三组MDA含量无明显差异;热习服组SOD含量在伤后即开始上升,较其他两组早lh,且其4h以后的SOD值高于高温高湿组;高温高湿组在10h时SOD值降至测不出结果,比其他两组早4h。以上结果说明,SOD、MDA参与了高温高湿环境下肢体火器伤后机体的病理生理过程;热习服能在一定程度上缓解伤后机体的病理变化,可作为高温高湿环境下防治肢体战创伤的有效手段。     

猪自体脂肪移植修复皮肤损伤的初步研究

目的　探讨脂肪对猪皮肤损伤的促愈作用 ,为临床皮肤损伤修复提供新的治疗方法。方法　 6只小型香猪背部中线两侧各制备 4个 2 5cm×2 5cm的全层皮肤缺损创面 ,将创面随机分为 4组 ,即空白对照组、脂肪治疗组、碱性成纤维生长因子 (bFGF)治疗组和表皮生长因子(EGF)治疗组 (每组各 12个创面 )。分别于伤后 3、7、14、2 1天采用大体观察和组织学方法动态观察创面愈合情况。结果　伤后 3天和 7天 ,脂肪治疗组肉芽组织形成丰富 ,血管密度大 ,伤腔容积小于其余各组 (P <0 0 1) ;伤后 7天和 14天 ,各组创面逐渐缩小 ,脂肪治疗组创面面积明显小于其余各组(P <0 0 1) ,并且再上皮化的新生表皮较其余各组为厚。结论　自体脂肪移植到局部皮肤创面后能明显促进创面愈合速度 ,提高愈合质量     

运动及补充芦荟对糖尿病大鼠血清抗氧化酶活性的影响

目的 :研究运动及补充芦荟对糖尿病大鼠血清抗氧化酶活性的影响。方法 :以注射链脲佐菌素诱导成年雄性SD大鼠成糖尿病模型 ,观察运动、补充芦荟、运动结合补充芦荟对糖尿病大鼠血清SOD、GSH -Px、CAT、MDA及胰岛素、血糖的影响。结果 :各干预组血清SOD、GSH -Px、CAT活性及胰岛素水平均显著高于糖尿病安静组 (P <0 0 5 ) ,MDA含量及血糖浓度显著低于糖尿病安静组 (P <0 0 5 ) ,其中补充芦荟 +运动组较补充芦荟组和运动组也有显著性差异 (P <0 0 5 )。结果表明 :运动和补充芦荟均可提高糖尿病大鼠血清抗氧化酶活性 ,降低脂质过氧化程度 ,改善胰岛素和血糖水平 ,而以运动结合补充芦荟效果更显著。因此在糖尿病的治疗中 ,采用各种有效措施的综合疗法 ,易取得更为满意的疗效。     

α-硫辛酸对高糖作用下血管内皮细胞ICAM-1表达的影响

目的 观察α-硫辛酸对高糖作用下血管内皮细胞的细胞间黏附分子-1(ICAM-1)表达的影响.方法 实验分3组:正常对照组(NG,5.5mmol/L葡萄糖);高糖组(HG,30mmol/L葡萄糖);药物干预组[30mmol/L葡萄糖+不同浓度α-硫辛酸(50、100、200μmol/L)].脐静脉内皮细胞株在不同条件下孵育48h,采用黄嘌呤氧化酶法测定各组内皮细胞SOD活性,以硫代巴比妥酸为底物检测MDA含量,ELISA法测定各组内皮细胞ICAM-1蛋白浓度,RT-PCR法检测内皮细胞ICAM-1 mRNA表达水平.结果 与NG组相比,HG组内皮细胞SOD活性明显降低(P<0.01),MDA含量、ICAM-1蛋白及mRNA表达水平明显上升(P<0.01);与HG组相比,药物干预组内皮细胞SOD活性明显升高(P<0.01),MDA含量、ICAM-1蛋白及mRNA表达水平明显降低(P<0.05).结论 α-硫辛酸可改善高糖作用下血管内皮细胞的氧化应激,抑制内皮细胞ICAM-1的表达水平.