大黄素诱导细胞凋亡对不同类型急性胰腺炎腺泡死亡方式的影响

Objective To investigate the effect of Chinese medicine emodin on death patterns of pancreaticacinar cells in different types of aute pancreatitis and explore its possible mechanism. Methods Rat acute edematous pancreatitis models and acute necrotic pancreatitis models were estab-lished and treated with emodin. Alternations of apoptosis, NF-κB mRNA, Pax mRNA and TNF-α mRNA expression in pancreatic tissue were studied with in situ TUNEL and RT-PCR. Results Nega-tive correlation was found between apoptosis and the severity of pancreatic damage. Following the treatment with emodin, more apoptosis than necrosis was observed in all treaded groups of acute pan-creatitis and the severity of pancreatic histological pathologic damage was dramatically improved. Local expression of NF-κB mRNA and Bax mRNA increased. Conclusion Pancreas aeinar death patterns of apoptosis are induced by emodin. Emodin might regulate the acinar cell death patterns by changing the activation of NF-κB and the expression of bax to lessen the severity.     

脑死亡时猪肝脏功能及组织学改变的研究

Objective To observe how brain death affects the hepatic morphology and function of pigs and explore the roles of NF-κB. Methods Under general anaesthesia twelve healthy pigs were allocated randomly to two groups:control group(6 pigs),with non-inflacted Foley balloon catheter placed in the cerebral ventricle for 24 h,and brain death group,6 pigs,with estabhshment of brain death for 24 h.The serum and hepatic tissues in the same locus were taken at 6 h,12 h,and 24 h after the initial conformation of brain death.AST and ALT were determined by automatic biochemistry analyzer.IL-1βwas determined by ELISA.The NF-κB mRNA was determined by Real-time PCR and the NF-κB p65 by immunohistochemistry. Results The AST,ALT,IL-1β in serum,the NF-κB mRNA and the NF-κB p65 in hepatic tissues in brain death group were higher than those in control group and they all increased with the time(P<0.05).In brain death group,hepatocytes were edematous lightly after 12 hours,and the swelling progressively deteriorated after 24 hours,but there were no necrosis. Conclusion The activated NF-κB by brain death promoted the synthesis and release of inflammatory mediators,resulting in the hepatic dysfunction.     

脑死亡时猪肝脏功能及组织学改变的研究

Objective To observe how brain death affects the hepatic morphology and function of pigs and explore the roles of NF-κB. Methods Under general anaesthesia twelve healthy pigs were allocated randomly to two groups:control group(6 pigs),with non-inflacted Foley balloon catheter placed in the cerebral ventricle for 24 h,and brain death group,6 pigs,with estabhshment of brain death for 24 h.The serum and hepatic tissues in the same locus were taken at 6 h,12 h,and 24 h after the initial conformation of brain death.AST and ALT were determined by automatic biochemistry analyzer.IL-1βwas determined by ELISA.The NF-κB mRNA was determined by Real-time PCR and the NF-κB p65 by immunohistochemistry. Results The AST,ALT,IL-1β in serum,the NF-κB mRNA and the NF-κB p65 in hepatic tissues in brain death group were higher than those in control group and they all increased with the time(P<0.05).In brain death group,hepatocytes were edematous lightly after 12 hours,and the swelling progressively deteriorated after 24 hours,but there were no necrosis. Conclusion The activated NF-κB by brain death promoted the synthesis and release of inflammatory mediators,resulting in the hepatic dysfunction.     

胰腺癌组织中程序性细胞死亡因子4与细胞色素C的关系

Objective To study the relationship between the expression of cytochrome c ( Cyt c) and programmed cell death 4 (PDCD4) in pancreatic cancer, and investigate the pathway of PDCD4 inducing the apoptosis of pancreatic cancer cells. Methods Pancreatic cancer specimens from 69 patients who received pancreatic resection from 1990 to 2002 in First Affiliated Hospital of China Medical University were collected. The expression of Cyt c in the 69 paraffin specimens of pancreatic cancer was detected by immunohistochemistry, and the expression of Cyt c in 8 samples of cold-preserved fresh pancreatic cancer and normal pancreatic tissues were detected by Western blot. The expression of PDCD4 and Cyt c in pancreatic cancer was analyzed by paired t test and chi-square test. Results Compared with normal pancreatic tissues, the expression of Cyt c in pancreatic cancer was significantly decreased. The positive expression rate of Cyt c in 69 samples of pancreatic cancer was 41% (28/69). The expression of Cyt c was positive in most patients with positive expression of PDCD4, and the expression of PDCD4 was negative in most patients with negative expression of Cyt c. The expression of PDCD4 and Cyt c was closely correlated with each other (χ2= 10.52, P < 0.05). Conclusions There is a close relationship between the expression of PDCD4 and Cyt c in pancreatic cancer. PDCD4 may induce the apoptosis of pancreatic cancer cells through mitochondrial pathway.     

In vitro lipofectamine mediated NF-κB decoy oligodeoxynucleotides transfection of Kupffer cells

Objective To study the transfection effects of nuclear factor-KappaB(NF-κB)decoy oligodeoxynucleotides(ODN) to Kupffer cells (KCs) mediated by lipofectamine,and investigate it's suppression effects on KCs activation. Methods Twenty-four Wistar rats were divided into three groups (n=8).(1)Control group,in which the normal KCs were isolated.(2)LPS group,in which 1 ms/L LPs was added to the culture system.(3)NF-κB decoy ODN group,in which KCs were transduced with NF-κB decoy ODN (4μg×105KCs)prior to LPS stimulation.The transfection efficiency Was assayed,and the phagocytosis function,NF-κB(P65) translocation,CD40 mRNA expression of KCs were also detected respectively. Results Kupffer cells were obviously activated after LPS stimulation.the phagocytosis function was reinforced.the activity of NF-κB transloeated from cytoplasm into nucleus was obviosly increaced.The co-stimulatory molecules expression(CD40 mRNA)significantly increased compared with control group(t=4.01,P<0.01).NF-κB decoy oligodeoxynucleotides can efficiently transfected into KCs mediated by lipofectamine,which can obviously suppress KCs activation,and downregulate the expression of downstream gene(compared with LPS group,t=4.89,P<0.01). Condusion NF-κB decoy ODN can efficiently transfect into KCs and inhibit it's activation.     

In vitro lipofectamine mediated NF-κB decoy oligodeoxynucleotides transfection of Kupffer cells

Objective To study the transfection effects of nuclear factor-KappaB(NF-κB)decoy oligodeoxynucleotides(ODN) to Kupffer cells (KCs) mediated by lipofectamine,and investigate it's suppression effects on KCs activation. Methods Twenty-four Wistar rats were divided into three groups (n=8).(1)Control group,in which the normal KCs were isolated.(2)LPS group,in which 1 ms/L LPs was added to the culture system.(3)NF-κB decoy ODN group,in which KCs were transduced with NF-κB decoy ODN (4μg×105KCs)prior to LPS stimulation.The transfection efficiency Was assayed,and the phagocytosis function,NF-κB(P65) translocation,CD40 mRNA expression of KCs were also detected respectively. Results Kupffer cells were obviously activated after LPS stimulation.the phagocytosis function was reinforced.the activity of NF-κB transloeated from cytoplasm into nucleus was obviosly increaced.The co-stimulatory molecules expression(CD40 mRNA)significantly increased compared with control group(t=4.01,P<0.01).NF-κB decoy oligodeoxynucleotides can efficiently transfected into KCs mediated by lipofectamine,which can obviously suppress KCs activation,and downregulate the expression of downstream gene(compared with LPS group,t=4.89,P<0.01). Condusion NF-κB decoy ODN can efficiently transfect into KCs and inhibit it's activation.     

经皮电刺激防治失神经骨骼肌萎缩机制研究

Objective To investigate the effect of electric stimulation on changes of nuclear factor-κB (NF-κB)and muscle Ring Finger-1(MuRF1)d denervated muscles,and explore the mechanism of muscle atrophy prevention bv electric stimulation. Methods Gastroonemius muscle denervation was created by transecting the right sciatic nerve in 54 Wister rats.The animals were then randomized to two groups,one with electric stimulation one without.Levels of NF-κB and MuRF1 mRNA and protein in the gastrocnemius muscle were detcetcd by RT-PCR and western Blot at different intervals after denervation.The ratio of muscle wet weight was analyzed for comparison. Results The level of mRNA and protein of increased correspondingly at different intervals after denervation(P<0.05).The group with electric stimulus had lower levels of NF-κB and MuRF1 of mRNA and protein,and higher muscle wet weight comparing to the denervation group.Conclusion Electric stimulation delays denervation muscle atrophy by inhibiting the NF-κB/MuRF1 pathways.     

经皮电刺激防治失神经骨骼肌萎缩机制研究

Objective To investigate the effect of electric stimulation on changes of nuclear factor-κB (NF-κB)and muscle Ring Finger-1(MuRF1)d denervated muscles,and explore the mechanism of muscle atrophy prevention bv electric stimulation. Methods Gastroonemius muscle denervation was created by transecting the right sciatic nerve in 54 Wister rats.The animals were then randomized to two groups,one with electric stimulation one without.Levels of NF-κB and MuRF1 mRNA and protein in the gastrocnemius muscle were detcetcd by RT-PCR and western Blot at different intervals after denervation.The ratio of muscle wet weight was analyzed for comparison. Results The level of mRNA and protein of increased correspondingly at different intervals after denervation(P<0.05).The group with electric stimulus had lower levels of NF-κB and MuRF1 of mRNA and protein,and higher muscle wet weight comparing to the denervation group.Conclusion Electric stimulation delays denervation muscle atrophy by inhibiting the NF-κB/MuRF1 pathways.     

单肺通气吸入不同氧分量对兔肺组织NF-κB的影响

Objective To study the effects of fraction of inspired oxygen on nuclear factor-κB (NF-κB) of lung tissue in rabbit one-lung ventilation(OLV) models.Methods 12 white Japanese rabbits were randomly divided into 2 groups(n=6).Bronchial intubation was performed with artificial double-lumen tube,and right OLV was conducted for 2 h and then tollowed tow-lung ventilation(TLV) for 1 h.Fraction of inspired oxygen was set as 1.0(group A) or 0.6(group B).NF-κB in lung tissue was detected,and arterial blood gases were analyzed before OLV,at 30 min of OLV and 30 min after TLV reversion.Pathology of lung tissue was examined and wet/dry(W/D) of lung weight was measured.Results After TLV restore,the oxygenation index was higher and lower than 300 in group B and group A,respectively.The W/D,the activation and the level of NF-κB in left lung tissue was less in group B than in group A (P＜0.01),and pathological change in left lung tissue was lighter in group B than in group A.Conclusion OLV with 60% oxygen may attenuate lung injury by decreasing the activation and the level of NF-κB in lung tissue.     

The roles of inflammatory transmitters in the mechanism of acute severe pancreatitis

ObjectiveTo study the pathogenesis of acute severe pancreatitis(ASP). Methods: Minic models of rats with ASP were replicated. Retrograde injection of 3.5% sodium traurodeoxideocholic acid into them via pancreatic-bile duct with the catheters to abdominal aorta and peripheral blood vessel was performed. Then the concentrations of plasmic TXA2 and PGF1α were measured by RIA. The changes of pancreatic morphology were observed by macroscopy and microscopy,and microcirculation observed by intravital microscopy. Results: The concentration of plasmic TXA2 is rapidly deereased in abdominal aorta perfusion. The changes of pancreatic morphology and microcirculation and the concentration of plasmic TXA2 is significantly different(P<0.01). Conclusion: The ob-stacle of pancreatic microcirculation is the cause and effect.     

胫骨干骨折的手术治疗对策

目的：明确不同固定器械在胫骨干不同骨折类型固定中的特点，以指导临床应用。方法：68例胫骨干骨折，行加压钢板螺钉、交锁髓内钉、单侧外固定架固定后，作临床疗效分析。结果：加压钢板固定组42例，感染5例，骨不连1例，平均愈合时间3．8个月；交锁髓内钉固定组13例，无感染及骨不连，平均愈合时间5．4个月；单侧外固定架组13例，骨不连1例，踝关节背伸受限3例，平均愈合时间4．5个月。结论：胫骨骨折交锁髓内钉固定并发症少，功能恢复好，适用范围广，但要注意及时进行动力加压。加压钢板及外固定架固定应选择各自的最佳适应证，以达到理想的疗效。     

不同方法重建指尖离断静脉回流的疗效分析

目的：探讨不同方法重建指尖离断静脉回流的疗效。方法：2008年3月-2013年2月收治指尖离断患者80例,38例吻合指侧方静脉重建回流,术中吻合动静脉比例1：1或1：2或2：2,平均1：2;22例吻合指腹静脉重建回流,术中吻合动静脉比例1：1;20例未吻合静脉,术中仅吻合1条动脉,行侧切口或甲床放血。观察各组治疗效果。结果：吻合指侧方静脉组手指全部成活,无一例发生回流障碍;吻合指腹静脉组19例发生静脉危象,其中4例手指坏死;未吻合静脉组20例均发生回流障碍,其中6例手指坏死。58例获随访,随访时间6~28个月。吻合指侧方静脉组32例,指尖外形佳、指腹饱满;吻合指腹静脉组14例,指体轻度萎缩,指甲生长不平整;未吻合静脉组12例,指体萎缩明显。吻合指侧方静脉组指甲生长近平整,长度长于其他两组[（14.4±3.2）mm比（12.5±2.3）mm和（12.2±2.2）mm],远侧指间关节活动度大于其他两组[（63±5）°比（48±3）°和（45±7）°],两点分辨觉小于其他两组[（4.6±0.4）mm比（7.1±1.2）mm和（7.3±0.6）mm],感觉级别高于其他两组[S（3.45±0.39）级比S（2.57±0.42）级和S（2.55±0.49）级],差异均具有显著性（P〈0.05）。吻合指腹静脉组和未吻合静脉组在指甲长度、运动和感觉方面差异无统计学意义（P〉0.05）。结论：吻合指侧方静脉能有效解决指尖再植静脉回流问题,可避免回流障碍,成活率高,促进指甲生长,可恢复 DIPJ 活动度及感觉。     

膝关节后交叉韧带断裂治疗临床分析

目的 对35例膝关节后交叉韧带断裂治疗进行临床分析,重点探讨了有关交叉韧带断裂的治疗问题。方法 经明确诊断后,分析采用胫骨附着处撕脱骨折复位固定手术治疗26例、早期髌韧带中1／3移植重建3例、单纯长腿石膏固定6例。结果 本组病例全部进行随访,随访时间13个月－5年,胫骨附着处撕脱骨折复位固定及髋韧带中1／3移植重建29例为优良、单纯长腿石膏固定6例为差。结论 后交叉韧带断裂后应该及时给予手术修复;膝后外侧手术入路,操作简单,暴露充分;少于3个月的陈旧性病例仍适应手术治疗。