Curative effect of radiotherapy at various doses on subcutaneous alveolar echinococcosis in rats

Background  Alveolar echinococcosis (AE) is a disease in human and animals, and the cure rate is unsatisfactory. This study aimed to investigate the curative efficacy of different doses of locally applied radiotherapy on alveolar echinococcosis in rats.

Methods  Rats infected with Echinococcus multilocularis were randomly divided into 4 groups of 15 rats each: low-, middle-, and high-irradiation groups and a control group. Rats in the control group underwent no treatment, while rats in the irradiation groups received 6-MeV radiotherapy at 20 Gy/8 f, 40 Gy/8 f, and 60 Gy/8 f respectively, once every 3 days for a total of 8 times. One month after radiotherapy, wet weight and AE vesicle inhibitory rate were detected in rats of each group. Histopathologic and ultrastructural observations of tissues with AE lesions were performed.

Results  In the treatment groups, an obvious inhibitory effect was found in AE rats; the inhibitory rates were 50%, 72%, and 82%, respectively. There were also statistical differences in pathological changes and average wet weight of the lesions compared with the control group (P <0.05). In the treatment groups, injuries of various degrees were found in the ultrastructure of the laminated and germinal layers in the capsular wall of AE, and injury was most severe in the high-dose group.

Conclusion  Radiotherapy has a dose-dependent inhibitory effect on the growth of AE.

     

Knee function after anterior cruciate ligament reconstruction with patellar or hamstring tendon: a meta-analysis

Background  There is currently no consensus regarding the best graft type for anterior cruciate ligament reconstruction. Therefore, the aim of this study was to investigate the effects of patellar and hamstring tendon grafts on long-term knee function after anterior cruciate ligament reconstruction.

Methods  This meta-analysis was conducted according to the methodological guidelines outlined by the Cochrane Collaboration. An electronic search of the literature was performed and all trials published between January 1966 and August 2011 comparing knee function after anterior cruciate ligament reconstruction using patellar tendon grafts with knee function after reconstruction with hamstring tendon grafts were pooled. Six studies were included in the final meta-analysis.

Results  Anterior cruciate ligament reconstruction using hamstring tendon grafts resulted in greater pain upon kneeling than reconstruction using patellar tendon grafts (P=0.001). However, both grafts resulted in similar levels of anterior tibial translation, and similar results regarding isokinetic extension/flexion tests, Lysholm scores, and the stair-hop test (P >0.05).

Conclusion  Anterior cruciate ligament reconstruction using patellar or hamstring tendon grafts results in similar long-term knee function.

     

Effect of peritumoral injection of boanmycin hydrochloride within temperature-sensitive in situ gel using Hep-G2 hepatoma nude mice model

Background  Boanmycin hydrochloride, a new antitumor agent, has a short half-life and fast clearance speed in vivo. The aim of this research was to investigate the effectiveness of peritumor injection of boanmycin hydrochloride within temperature-sensitive gel in situ using Hep-G2 hepatoma nude mice model.

Methods  Nude mice with human Hep-G2 tumor in right flank were randomly divided into four groups: normal saline group, in situ gel only group, boanmycin hydrochloride in situ saline group, and boanmycin hydrochloride in situ gel group, and were treated with injection of corresponding agents into peripheral tissue of the tumor. The volume of the tumor and the body weight of the mice were regularly measured, and tumor growth curve was generated. The size, internal echo, and blood flow of the tumors were observed by color Doppler ultrasonography. Histopathologic changes of the tumor after treatment were observed under both optical and transmission electron microscopy.

Results  The tumor growth was significantly inhibited by peritumoral therapy in boanmycin hydrochloride in situ gel group with the tumor inhibitory rate of 86.76%. The blood flow of the tumor was still seen in both normal saline group and in situ gel only group on color Doppler ultrasound. Punctate calcification and dotted blood flow were seen in boanmycin hydrochloride group; however, there was massive calcification and no blood flow in the tumor in the boanmycin hydrochloride in situ gel group. Large areas of necrosis and apoptotic cells were shown by microscopic observation in boanmycin hydrochloride in situ gel group.

Conclusion  Temperature-sensitive boanmycin hydrochloride in situ gel can effectively delay the release of boanmycin hydrochloride and increase its anticancer effects for liver cancer in animal model.

     

Effect of periodontal treatment on glycosylated hemoglobin levels in elderly patients with periodontal disease and type 2 diabetes

Background  Periodontal disease is closely related to type 2 diabetes and is an important complication of diabetes. This study aimed to investigate the effect of periodontal treatment on levels of blood glucose (Glu) and glycosylated hemoglobin (HbA1c) among elderly patients with type 2 diabetes and periodontal disease.

Methods  A total of 107 elderly patients with type 2 diabetes and periodontal disease were selected and divided into two groups according to their HbA1c levels. Group A was a well-controlled diabetic group and group B was uncontrolled. Their probing depth (PD), attachment loss (AL), the value of Glu and HbA1c were analyzed before periodontal treatment and 4 months later.

Results  There was a significant difference in periodontal condition between groups A and B (P <0.01). The periodontal condition for both groups was significantly (P <0.01) improved after periodontal therapy. The effect of treatment in group A was more pronounced than group B, and the difference was significant (P <0.01). After the periodontal treatment, Glu and HbA1c were reduced significantly in both groups (P <0.05).

Conclusions  Periodontal condition is related to the control of Glu level among elderly patients with type 2 diabetes and periodontal disease. Periodontal treatment can effectively reduce the level of Glu and HbA1c as well as improve the periodontal condition in elderly type-2 diabetes patients with periodontal disease.

     

Impact of Fish Oil Enriched Total Parenteral Nutrition on Elderly Patients After Colorectal cancer Surgery

Background  Polyunsaturated omega-3 fatty acids may beneficially influence healing processes and patient outcomes. The aim of this research was to study the clinical efficacy of fish oil enriched total parenteral nutrition in elderly patients after colorectal cancer surgery.

Methods  Fifty-seven elderly patients with colorectal cancer were enrolled in this prospective, randomized, double-blind, controlled clinical trial. All patients received isocaloric and isonitrogenous total parenteral nutrition by continuous infusion (20–24 hours per day) for seven days after surgery. The control group (n=28) received 1.2 g/kg soybean oil per day, whereas the treatment group (n=29) received 0.2 g/kg fish oil and 1.0 g/kg soybean oil per day. Blood samples were taken pre-operatively, and at days one and eight after the operation. The plasma levels of CD4, CD8, CD4/CD8, interleukin 6 (IL-6) and tumor necrosis factor α (TNF-α) were measured. Clinical outcomes were then analysed.

Results  Patient characteristics were comparable between the two groups. At day eight post-surgery, IL-6, TNF-α and CD8 titres were lower in the treatment group when compared to the control group; these results reached statistical significance. In the treatment group, there were fewer infectious complications and incidences of systemic inflammatory response syndrome (SIRS), and shorter lengths of hospital stay were observed. The total cost of medical care was comparable for the two groups. No serious adverse events occurred in either group.

Conclusions  Fish oil 0.2 g/kg per day administrated to elderly patients after colorectal surgery was safe and may shorten the length of hospital stay and improve clinical outcomes.

     

Reduced brain-derived neurotrophic factor expression in cortex and hippocampus involved in the learning and memory deficit in molarless SAMP8 mice

Background  The molarless condition has been reported to compromise learning and memory functions. However, it remains unclear how the molarless condition directly affects the central nervous system, and the functional consequences on the brain cortex and hippocampus have not been described in detail. The aim of this study was to find the molecular mechanism related with learning and memory deficit after a bilateral molarless condition having been surgically induced in senescence-accelerated mice/prone8 (SAMP8) mice, which may ultimately provide an experimental basis for clinical prevention of senile dementia.

Methods  Mice were either sham-operated or subjected to complete molar removal. The animals’ body weights were monitored every day. Learning ability and memory were measured in a water maze test at the end of the 1st, 2nd, and 3rd months after surgery. As soon as significantly prolonged escape latency in the molarless group was detected, the locomotor activity was examined in an open field test. Subsequently, the animals were decapitated and the cortex and hippocampus were dissected for Western blotting to measure the expression levels of brain-derived neurotrophic factor (BDNF) and the tropomyosin related kinase B (TrkB), the high affinity receptor of BDNF.

Results  Slightly lower weights were consistently observed in the molarless group, but there was no significant difference in weights between the two groups (P >0.05). Compared with the sham group, the molarless group exhibited lengthened escape latency in the water maze test three months after surgery, whereas no difference in locomotor activity was observed. Meanwhile, in the cortex and hippocampus, BDNF levels were significantly decreased in the molarless group (P <0.05); but the expression of its receptor, TrkB, was not significantly affected. 

Conclusion  These results suggested that the molarless condition impaired learning and memory abilities in SAMP8 mice three months after teeth extraction, and this effect was accompanied by significantly reduced BDNF expression in the cortex and hippocampus.

     

Sufentanil reduces emergence agitation in children receiving sevoflurane anesthesia for adenotonsillectomy compared with fentanyl

Background  Emergence agitation is a common problem in pediatric anesthesia, especially after sevoflurane induction and maintenance anesthesia. The purpose of this study was to investigate the effect of sufentanil to reduce emergence agitation after sevoflurane anesthesia in children undergoing adenotonsillectomy compared with fentanyl.

Methods  One hundred and five children, aged 3–11 years, were randomly allocated to receive normal saline (control group), sufentanil 0.2 μg/kg (S2) or fentanyl 2 μg/kg (F2) 1 minute after loss of the eyelash reflex. Anesthesia was induced and maintained with sevoflurane. Time to tracheal extubation, recovery time, Paediatric Anesthesia Emergence Delirium (PAED) scale, and emergence behavior were assessed.

Results  The incidence of severe agitation was significantly lower in S2 and F2 groups vs. the control group, 4/32 and 15/34 vs. 24/34 respectively, (P=0.002, 0.009, respectively). PAED scales were significantly different among three groups (P=0.007), and lower in the S2 and F2 groups than in the control group (P=0.007 and P=0.025, respectively). And the incidence of severe agitation and the PAED scale score was significantly different between the S2 and F2 groups (P=0.007, P=0.019, respectively). Time to tracheal extubation and recovery time were similar in all three groups.

Conclusions  Administration of sufentanil at 0.2 μg/kg after induction of anesthesia reduced emergence agitation in children receiving sevoflurane anesthesia for adenotonsillectomy compared with fentanyl. This was without delaying the recovery time or causing significant hypotension.

     

创伤骨科患者创伤严重程度和血浆D二聚体水平的相关分析

Background  The correlation between the plasma D-dimer level and deep vein thrombosis has not been conclusive in various studies. The aim of this research was to study the relationship between plasma D-dimer levels and the severity of orthopedic trauma by retrospective examination of orthopedic trauma cases.

Methods  Clinically acute trauma and non-acute trauma patients were selected and their plasma D-dimer levels were measured. Plasma D-dimer levels in patients of these two groups were compared. The relationship between the plasma D-dimer level and the severity of the trauma was also studied.

Results  There were 548 cases in the acute trauma group and 501 cases in the non-acute trauma group. The levels of plasma D-dimer were significantly higher in the acute trauma group than in the non-acute trauma group (P <0.01). In the acute trauma group, the correlation between the D-dimer level and the number of fractures was a positive linear correlation (r=0.9532).

Conclusions  Elevated plasma D-dimer is common in trauma patients. The D-dimer level and the number of fractures in the trauma patients are closely correlated. D-dimer is not only an indicator for the diagnosis of deep vein thrombosis and pulmonary embolus, but also an indicator of the severity of trauma in acute trauma patients.

     

Comparison of compensatory sweating and quality of life following thoracic sympathetic block for palmar hyperhidrosis: electrocautery hook versus titanium clip

Background  Video-assisted thoracic sympathetic block is an effective, safe, and minimally invasive method for treatment of primary hyperhidrosis. The purpose of this study was to decide which one of using electrocautery hook and titanium clip is the appropriate procedure for primary palmar hyperhidrosis by assessing the compensatory sweating (CS) and quality of life (QOL) of patients after sympathetic block.

Methods  Between October 2007 to August 2010, 120 patients with primary palmar hyperhidrosis were randomly divided into two groups, electrocautery hook group (60 patients) and titanium clip group (60 patients). All patients were treated by sympathetic block at T4 level. The CS was graded based on severity and location; the QOL was classified to 5 different levels based upon the summed total scores (range from 20 to 100) before and after surgery. The variables were compared.

Results  The postoperative follow-up period was 2 months. All patients were cured. Three patients in electrocautery hook group and 1 patient in titanium clip group had a unilateral pneumothorax on chest X-ray, but none of them was necessary to have chest drainage. Neither perioperative mortality nor serious complications such as cardiac arrhythmia or arrest were observed during the operation. No bradycardia or Horner’s syndrome occured. CS was not more common in patients in titanium clip group than in those in electrocautery hook group (P=0.001). Moderate and severe CS was few in all patients, and there was no significant difference between two groups (P=0.193). Most of the patients feel a notable improvement of the the QOL; nevertheless, there was no significant difference between the groups (P=0.588).

Conclusions  Both electrocautery hook and titanium clip used for sympathetic block at the T4 level are effective, safe, and minimally invasive for palmar hyperhidrosis. Because of the lower severity of CS and the similar improvements in the QOL after operation, we prefer to use of titanium clip for treating palmar hyperhidrosis.

     

Influential factors and effect evaluation of the intra-operative puncture biopsy for pancreatic masses

Background  Polyunsaturated omega-3 fatty acids may beneficially influence healing processes and patient outcomes. The aim of this research was to study the clinical efficacy of fish oil enriched total parenteral nutrition in elderly patients after colorectal cancer surgery.

Methods  Fifty-seven elderly patients with colorectal cancer were enrolled in this prospective, randomized, double-blind, controlled clinical trial. All patients received isocaloric and isonitrogenous total parenteral nutrition by continuous infusion (20–24 hours per day) for seven days after surgery. The control group (n=28) received 1.2 g/kg soybean oil per day, whereas the treatment group (n=29) received 0.2 g/kg fish oil and 1.0 g/kg soybean oil per day. Blood samples were taken pre-operatively, and at days one and eight after the operation. The plasma levels of CD4, CD8, CD4/CD8, interleukin 6 (IL-6) and tumor necrosis factor α (TNF-α) were measured. Clinical outcomes were then analysed.

Results  Patient characteristics were comparable between the two groups. At day eight post-surgery, IL-6, TNF-α and CD8 titres were lower in the treatment group when compared to the control group; these results reached statistical significance. In the treatment group, there were fewer infectious complications and incidences of systemic inflammatory response syndrome (SIRS), and shorter lengths of hospital stay were observed. The total cost of medical care was comparable for the two groups. No serious adverse events occurred in either group.

Conclusions  Fish oil 0.2 g/kg per day administrated to elderly patients after colorectal surgery was safe and may shorten the length of hospital stay and improve clinical outcomes.

     

雷帕霉素抑制兔眼后发性白内障的实验研究

目的：探讨雷帕霉素（Rapamycin,RAPA）抑制兔眼后发性白内障发生的有效性及可行性。方法：雄性新西兰大白兔12只，24眼随机分为空白对照组，RAPA 7.5、15和30?ng/ml组,4组均行超声乳化透明晶状体吸除术；实验组灌注液中分别加入不同浓度的RAPA。术后不同时间裂隙灯观察兔眼角膜、房水及晶状体后囊膜混浊情况；3个月后处死动物，分别对4组兔眼行组织病理学及电镜检查。结果：术后12周，RAPA15?ng/ml组和30?ng/ml组后囊混浊发生率较对照组明显减少（P＜0.05）；各组术后裂隙灯下角膜混浊度无明显差异。结论：浓度为15～30?ng/ml的RAPA灌注液可有效抑制兔眼后发性白内障的发生且对角膜无明显的毒性作用。     

全反式维甲酸对兔后发性白内障的抑制作用

目的探讨全反式维甲酸（ATRA）对兔后发性白内障的抑制作用。方法将12只健康家兔（24只眼）随机分为眼用平衡盐液组（空白对照组）和ATRA组（药物实验组）,每组6只兔（12只眼）,在全麻下进行透明晶状体囊外摘除术。分别于术后1、3、7、14、30和60d对术眼进行裂隙灯和眼底检查,并抽取房水置于-80℃保存。用酶联免疫吸附测定术后兔眼房水中的白细胞介素-1β（IL-1β）和转化生长因子-β（TGF-β）的含量。3月后处死动物,分别对两组兔眼进行组织病理学及电镜观察。结果术后房水中IL-1β和TGF-β含量实验组明显低于对照组（P〈0．001）。术后3月实验组晶体后囊透明度优于对照组（P〈0．05）。对照组晶体后囊前覆盖一层晶体上皮细胞,实验组晶体后囊前无明显晶体上皮细胞增殖。结论ATRA可抑制房水中IL-1β和TGF-β的含量,能够有效抑制后发性白内障的发生。     

去整合素防治兔眼后发性白内障的实验研究

目的 探讨去整合素DTY29对体外人晶状体上皮细胞及体内兔眼品状体上皮细胞增殖抑制的有效性及其安全性.方法 （1）体外：将36孔板分为a对照组、b、c、d实验组,每组9孔,培养人品状体上皮细胞,细胞划痕后各组依次加入培养液、0.08μmol/L、0.4 μmol/L和2μmol/L浓度DTY29,于0h、6h、12h、24 h倒置显微镜拍照并测量划痕宽度; （2）体内：雄性新西兰大白兔36只,随机分为对照组A组,实验组：B、C、D组,每组9只兔.术前均测角膜内皮细胞计数.右眼均行透明晶状体皮质超声乳化吸除术,术毕A组前房注入林格氏液0.2 mL,B、C、D组分别注入10 μmol/L、20 μmol/L和40 μmol/L DTY29溶液0.2 mL,术后观察角膜、前房、瞳孔、囊膜浑浊及眼底情况.结果 （1）体外细胞划痕实验：6h、12h、24 h划痕宽度比较,a组较b、c、d组均明显缩小（P＜0.05）; （2）角膜内皮细胞丢失A、B、C组间无统计学意义（P＞0.05）,D组与A、B、C组相比,显著减少（P＜0.05）; （3）A、B组术后1～3 m均有后发性白内障发生,但发生率无统计学意义（P＞0.05）,C、D组未发生后发性白内障; （4）各组均未发生视网膜脱离、脉络膜脱离等严重并发症.结论 DTY29体外或体内均能抑制晶状体上皮细胞增生,其抑制作用与药物浓度呈正相关,在活体内,高浓度DTY29对角膜内皮细胞具有破坏作用,暂未发现其对眼内其他组织造成明显影响,证明低浓度下用药的安全性;最适宜的用药浓度可能在10 μmol/L-20 μmol/L之间,其眼内用药安全性和最适宜浓度仍需进一步探索。     

肝素点眼预防后囊混浊的实验与临床研究

目的 :探讨肝素点眼对白内障囊外摘除术后后囊混浊的作用。方法 :在 2 4只兔建立白内障动物模型 ,随机分为肝素点眼组和对照组 ,行双眼白内障囊外摘除术。 10 0例 ( 10 0眼 )老年性白内障 ,随机分为肝素点眼组和对照组 ,行超声乳化摘除联合人工晶体植入 ,术后应用裂隙灯显微镜及检眼镜观察角膜、前房及后囊混浊情况 ,并对兔后囊膜行组织学检查。结果 :肝素点眼组与对照组前房反应及后囊混浊眼数有显著性差异 (P <0 .0 5 )。结论 :肝素可减少早期前房反应 ,抑制后囊混浊的形成 ,为一种简便、安全而有效的预防后囊混浊的方法     

两种手术治疗原发性闭角型青光眼的疗效及凝血功能变化研究

目的探讨两种手术对原发性闭角型青光眼患者的临床疗效及凝血功能指标的变化差异。方法选取80例(80眼)原发性闭角型青光眼患者为受试对象,随机抽样法分成A、B两组,各40例。A组予以超声乳化联合房角分离术,B组予以小梁切除术。观察对比两组患者手术前后眼压、中央前房深度(CCT)及凝血指标变化情况,记录其术后房角开放180°比率及并发症发生率差异。结果术后,两组眼压均较术前显著降低(P0.05),但组间对比无统计学意义(P0.05);两组CCT检查结果则较术前显著提升(P0.05),且A组B组(P0.05)。术后3个月时,两组患者除PT、TT水平较术前无明显改变(P0.05)外,Fbg水平较术前显著降低,且A组B组(P0.05);aPTT水平则明显升高,且A组B组(P0.05)。A组术后3个月时房角开放180°比率为97.5%,显著高于B组的72.5%(P0.05)。两组受试者术后均无感染性眼内炎、恶性青光眼等严重并发症发生,其中A组并发轻度角膜水肿及前房炎症反应4例(10.0%),B组并发轻度角膜水肿症状6例(15.0%),保守治疗后均恢复正常,术后并发症发生率对比无统计学意义(P0.05)。结论超声乳化联合房角分离术相较于小梁切除术对原发性闭角型青光眼患者视功能和眼压的改善效果更优,手术安全理想,于患者预后恢复有利。     

环形撕囊的形状和大小与后发障形成以及术后人工晶体位置的关系

目的:研究环形撕囊的形状和大小与后发障形成以及术后人工晶体位置之间的关系.方法:对512例(600只眼)行环形撕囊后超声乳化摘除 人工晶体植入术.术后3个月在裂隙灯显微镜下观察患者晶体囊袋结构的变化和人工晶体的位置.结果:A组(410只眼)人工晶体与前囊膜无夹持,B组(126只眼)人工晶体与前囊膜部分夹持,C组(42只眼)人工晶体与前囊膜完全夹持,D组(22只眼)人工晶体与前囊膜虽无夹持但前囊膜环与后囊膜发生紧密粘连.经χ2检验,发现:(1)中心后囊膜发生混浊,C组、D组大于B组(P＜0.01),B组大于A组(P＜0.01).(2)人工晶体光学面在眼内的正位率上A组大于C组(P＜0.01),C组大于B组和D组(P＜0.01).结论:在排除了患者非手术因素的影响后,白内障超声乳化中环形撕囊位置、形状和大小是术后后囊膜中心混浊的发生率以及人工晶体光学面正位率的关键.     

白内障超声乳化术后囊膜破裂的临床分析

目的：探讨白内障超声乳化手术中后囊膜破裂发生的原因、处理方法及对视力的影响.方法：将白内障超声乳化手术中发生后囊膜破裂17例分为2组：A组11例,在超声乳化核块过程中发生后囊膜破裂;B组6例,在注吸皮质和植入人工晶体时发生后囊膜破裂.比较2组术后视力、眼压、瞳孔、人工晶体位置、眼底情况.结果：术后1周,A组角膜水肿、前房反应和玻璃体混浊与B组差异均无统计学意义（P＞0.05）,A组视力低于B组（P＜0.01）.术后3个月,A组最佳矫正视力、瞳孔欠圆和眼底黄斑水肿发生率与B组差异均无统计学意义（P＞0.05）,但2组术后视力均明显好于术前.结论：白内障超声乳化术中发生后囊膜破裂,只要术中及时发现、正确处理,不会产生其他严重并发症,仍可以提高患者的视力,提高超声乳化手术初学者的信心.     

延肾胶囊对残肾系膜细胞凋亡及其细胞外基质代谢的影响

目的探讨"延肾胶囊"对残肾肾小球系膜细胞凋亡及其细胞外基质代谢的影响.方法Wistar大鼠120只,随机分为6组,A组为假手术对照组,B组为5/6肾切除;C,D和E组分别为肾切除 低、中、高剂量延肾胶囊;F组为5/6肾切除 肾衰宁.术后A,B两组给予等容积生理盐水灌胃.定量喂养,自由饮水.于术后15,90天测定各指标,每组每时相点观察10只大鼠.结果术后B组血浆血管紧张素Ⅱ浓度、肾小球系膜细胞增殖指数和凋亡指数、肾组织TGF-β1,CoⅣ,Fas,FasL积分光密度等指标显著高于A组.C,D和E组血浆血管紧张素Ⅱ浓度、肾小球系膜细胞增殖指数、肾组织TGF-β1和CoⅣ积分光密度高于A组,但显著低于B组,随着延肾胶囊剂量增加,上述指标有逐渐降低的趋势;肾小球系膜细胞凋亡指数、Fas和FasL积分光密度等指标显著高于A,B两组,随着延肾胶囊剂量增加,上述指标有逐渐升高趋势.F组血浆血管紧张素Ⅱ浓度、肾小球系膜细胞增殖指数、肾组织TGF-β1和CoⅣ积分光密度,低于B组,但高于D,E两组;肾组织Fas和FasL积分光密度等指标显著高于A和B组,稍低于D、E两组,肾小球系膜细胞凋亡指数与B组无显著差异,显著低于C,D和E3组.结论"延肾胶囊"能显著抑制5/6肾切除大鼠残肾血管紧张素Ⅱ和TGF-β1的高表达,增加Fas和FasL的表达,抑制肾小球系膜细胞过度增生,促进增生的系膜细胞凋亡,稳定残肾小球系细胞数量,减轻细胞外基质的堆积,呈剂量依赖性;"肾衰宁"能抑制系膜细胞增生,但不能促使增生的系膜细胞凋亡.     

组织型纤溶酶原激活剂联合丝裂酶素C在青光眼滤过手术中抗增殖作用的实验研究

目的观察组织型纤溶酶原激活剂(t-PA)与丝裂酶素C(MMC)联合应用在动物青光眼滤过手术中的抗增殖作用。方法将40只新西兰大耳白兔随机分4组:A组为空白对照组,B组为标准对照组,将浸有0.2 mg/ml MMC棉片置于巩膜下5 min;C组为t-PA组,术毕前房注射250μg/mlt-PA 0.1 ml,术后1、3天球结膜下各注射0.3 ml;D组为t-PA联合MMC组,术中将浸有0.1mg/ml MMC的棉片置于巩膜瓣下5min,术毕前房注射200μg/ml t-PA 0.1 ml,术后1、3天球结膜下各注射0.3 ml。术后观察滤过道开放、滤过道新生胶原纤维生成情况及增殖细胞数量。结果 HE染色显示,D组滤过道开放比率较A、B、C组高。Masson三色染色显示,D组滤过道处的胶原较A、B、C组少且疏松。免疫组织化学染色显示,术后观察各时间点,D组PCNA表达较A、B、C组弱,差异有统计学意义(P<0.05)。结论 t-PA和较低浓度MMC在青光眼滤过手术中联合应用,其抗增殖能力较强,有望成为一种有效的抗青光眼术后瘢痕形成的新方法。     

去整合素kistrin对晶状体摘除术后兔晶状体上皮细胞MMP-2蛋白表达的影响

目的研究去整合素kistrin对晶状体摘除术后兔晶状体上皮细胞(LECs)中基质金属蛋白酶2(MMP-2)蛋白表达的影响。方法对40只新西兰大白兔右眼行透明晶状体摘除术(ECLE),术毕随机分为实验组及对照组,实验组囊袋内注入0.2 mL浓度为80 ng/mL的kistrin,对照组注入等量林格液,随机取10只左眼为空白组。分别于术后14 d(实验组A组、对照组B组)及3个月(实验组C组、对照组D组)取后囊膜,以肺癌组织为阳性对照组。应用Western blotting检测兔后囊膜组织及肺癌组织中的蛋白表达量。结果空白组后囊膜MMP-2无蛋白表达,A、B、C、D组均有蛋白表达。B组MMP-2的相对灰度值为0.769±0.011,A组为0.378±0.019;D组为1.015±0.020,C组为0.361±0.013,低于D组(P=0.000);D组相对灰度值较B组升高(P=0.000);A组、C组相对灰度值差异无统计学意义(P=0.217)。结论整合素kistrin可能在晶状体摘除术后MMP-2的表达中发挥重要的作用,这可能与Ⅳ型胶原的分泌减少密切相关。