口腔健康状况与冠心病关系的临床研究

目的探讨口腔健康状况与冠心病的相关关系；方法选取冠心病与非冠心病人各30例，方法：①比较两组间口腔健康状况的差异（包括牙周指数-PD、GI、PLI，牙周病牙数、缺牙数、龋病牙数）；②比较两组间龈下菌斑中血链球菌数和产黑色素茵群数的差异；③调查两组间与口腔健康和冠心病相关因素的差异（包括每天刷牙次数、口腔健康和冠心病关系知晓率、年龄、性别、文化程度、体重指数、吸烟、饮酒、嗜成食、规律运动习惯）。结果①单因素分析发现：两组在PD、PLI、牙周病牙数、缺牙数、龋病牙数、龈下菌斑中血链球菌可培养菌总数方面差异具有统计学意义（P〈0．05）；在每天刷牙次数、规律运动习惯及嗜成食方面差异也具有统计学意义（P〈0．05）；②Logistic多元逐步回归分析后，两组的龈下菌斑中血链球菌可培养菌总数和牙周袋探诊深度PD差异具有统计学意义（P〈0．05）。结论口腔健康状况尤其是牙周的健康状况与冠心病高度相关．应将牙周病的预防与控制提高到新的高度来认识，口腔科和心血管内外科医师都应将宣传、防治牙周病的知识作为自己应承担的责任与义务。     

Dynamic Imaging of Autophagy-lysosomal Pathway and Autophagy Function Following Pulmonary Hypoxia/Reoxygenation In Vitro

Alterations of the autophagy-lysosomal pathway(ALP) and autophagy have been involved in lung ischemia-reperfusion(I/R) injury. However, dynamic imaging of ALP function under lung I/R injury particularly is not fully understood. Here we depicted the live-cell fluorescence imaging of autophagosome to monitor ALP activation and autophagy function. The p As Red2-N1-LC3 vectors were transfected into CRL-2192 NR8383(an alveolar macrophage cell line) and CCL149(an alveolar epithelial cell line) successfully. 0-h, 2-h, 4-h, and 6-h hypoxia/0-h, 2-h, 4-h, and 6-h reoxygenation were then induced with an ALP inhibitor(3-MA) or activator(rapamycin) in the culture of transfected cells separately. ALP activation was conformed by up-regulating AMPK and beclin1 expression. Apoptosis was not obvious in 2-h hypoxia/2-h reoxygenation. p As Red2-N1-LC3 CCL149 and p As Red2-N1-LC3 NR8383 cells revealed gradually enhanced As Red2 from 2-h to 6-h hypoxia/reoxygenation. As Red2 varied sensitively to 3-MA and rapamycin interventions during 2-h hypoxia/reoxygenation. Our data provides a simple method of autophagosome imaging to monitor ALP activation and autophagy function in lung I/R injury.     

钙预处理对未成熟心肌的保护作用

目的 观察钙预处理对未成熟心肌的影响.方法 采用Langendorff离体灌注模型,分为3组,缺血再灌组(I/R):离体心脏灌注10 win、工作心15 min后停灌45 min恢复灌注15 min,转为工作心模型30 min;心脏缺血预处理组(IPC):离体灌注10 min转为工作心15 min,反复2次缺血5min/再灌5min,停灌45min后恢复灌注15min,转为工作心模型30min;钙预处理组(CP):离体心脏灌注10 min、工作心15 min后,反复3次45 s无钙KH液灌流/5 min KH液灌流,停灌45 min后恢复灌注15 min,转为工作心模型30 min.以血流动力学指标、生化指标和心肌超微结构作为观察指标.结果 IPC与CP组比较,血流动力学指标、生化指标和心肌超微结构等方面均无明显差异;CP、IPC与I/R组比较,左心室功能恢复、三磷酸腺苷含量(ATP)(11.53±1.85、13.40±1.96比4.27±0.83,P＜0.01)、超氧化物歧化酶(SOD)活性(230.47±11.72、236.28±12.69比124.17±6.20,P＜0.01)、心肌线粒体Ca2+ATP酶活性(17.86±1.39、16.38±1.27比6.78 ±0.64,P＜0.01)和心肌线粒体合成ATP的能力(104.29±9.60、102.43±9.53比50.83±4.75,P＜0.01)明显增强,在心肌含水量(75.32±1.25、73.29±1.26比84.23±2.03,P＜0.01)、丙二醛含量(1.32±0.12、1.23±0.11比2.61±0.37,P＜0.01)、肌酸激酶(53.17±5.32、57.47±5.62比123.65±9.63,P＜0.01)和乳酸脱氢酶漏出率(32.16±3.23、34.48±3.43比85.43±5.93,P＜0.01)、心肌细胞内(2.54 ±0.32、2.17±0.22比4.48±0.74,P＜0.01)和心肌线粒体Ca2+含量(35.91±4.01、36.85±3.97比68.29±6.90,P＜0.01)明显减少;CP、IPC组心肌超微结构损伤较I/R组明显减轻.结论 钙预处理对未成熟心肌具有明显保护作用

Abstract：

Objective To investigate the protective effects of Ca2+ preconditioning on isolated immature myocardium.Methods Isolated working rabbit heart model was used,and 18 rabbits were randomly divided into 3 groups:ischemic/reperfusion (I/R) group receiving 45 min ischemia followed by 45 min reperfusion;myocardial ischemic preconditioning (IPC) group receiving 5 min ischemia and 5 min reperfusion 2 times before 45 min ischemia followed by 45 min reperfusion;Ca2 + preconditioning (CP)group receiving no-Ca2 + preconditioning before 45 min ischemia followed by 45 min reperfusion.The hemodynamics,biochemistry and myocardial ultrastructure were tested.Results The hemodynamics,biochemistry and myocardial ultrastructure had no significant diferrence between CP group and IPC group.As compared with I/R group,in CP and IPC groups,the left ventricular function recovery,adenosine triphosphate content (ATP) (11.53 ± 1.85,13.40 ± 1.96 vs 4.27 ±0.83,P＜0.01),superoxide dismutase (SOD)activity (230.47± 11.72,236.28 ± 12.69 vs 124.17 ±6.20,P＜0.01),Ca2+-ATPase activity of mitothondia ( 104.29 ± 9.60,102.43 ± 9.53 vs 50.83 ± 4.75,P＜0.01 ) and synthesized ATP activity of mitochondria ( 104.29 ±9.60,102.43 ±9.53 vs 50.83 ±4.75 ,P ＜0.01 ) were improved,and myocardial water content ( 75.32 ± 1.25,73.29 ± 1.26 vs 84.23 ± 2.03 ,P＜0.01 ),malondialdehyde content ( 1.32 ± 0.12,1.23 ± 0.11 vs 2.61 ± 0.37 ,P＜0.01 ),the dehydrogenase (32.16 ± 3.23,34.48 ± 3.43 vs 85.43 ± 5.93,P ＜0.01 ) and creatine kinase leakage (53.17 ±5.32,57.47±5.62 vs 123.65 ±9.63 ,P ＜0.01 ),myocardial cell Ca2+ content (2.54 ±0.32,2.17 ±0.22 vs 4.48 ±0.74 ,P ＜0.01 ) and mitochondrial Ca2+ content(35.91 ±4.01,36.85 ±3.97 vs 68.29 ±6.90,P ＜0.01 ) were reduced.The ultra.structure injury was milder in CP group and ICP group than in I/R group.Conclusion CP has signifcantly protective effects on immature myocardium.     

老年胃部术后中、上段食管癌外科治疗的临床分析

目的 探讨胃手术后老年中、上段食管癌患者外科治疗的技术难点及围手术期管理.方法 回顾性分析45例胃手术后老年中、上段食管癌患者临床资料,包括手术术式、围手术期并发症等资料.结果 食管上段癌19例,食管中段癌26例.TNM分期:Ⅰ期16例,Ⅱa期18例,Ⅱb期9例,Ⅲ期2例.手术方式:病变食管切除,重建食管43例,其中残胃3例、结肠代食管40例;空肠造口术2例.术后临床治愈39例(86.67％),病情改善4例(8.89％);死亡2例(4.44％).术后30 d并发症12例(17.78％),共22例次.术后32例随访5年,1,3,5年生存率分别为78.13％,56.25％和21.88％.结论 有胃手术史的老年食管中、上段癌患者,严格掌握手术适应证,加强围术期管理,采用结肠代食管或残胃代食管可延长患者生存期,改善生活质量.     

金属硫蛋白对供心细胞bcl-2、bax和Fas蛋白表达的影响

金属硫蛋白(MT)是普遍存在于各种生物体内的具有多种生物学功能的可诱导蛋白，多种生理及病理情况下均有MT的变化。B淋巴细胞瘤／白血病2蛋白(bcl-2)、bcl-2家族bax蛋白、肿瘤坏死因子Fas抗原等蛋白的表达在细胞凋亡中起重要作用，近来研究亦表明MT与细胞凋亡密切相关，其对供心保存后bcl-2，bax和Fas等相关凋亡蛋白表达的影响尚未可知，我们通过腹腔注射ZnSO4诱导MT在心肌的表达就此做进一步研究．     

陈旧性创伤性主支气管断裂的临床特征和手术技巧

目的探讨陈旧性创伤性主支气管断裂的临床特征和吻合方法,提高诊断及治疗效果。方法17例陈旧性创伤性主支气管断裂患者,14例行支气管端端吻合术,2例行右肺上叶袖状切除术,1例左全肺切除术。5例用丝线或涤纶线间断全层缝合,6例用微桥线间断全层缝合,6例用prolene线行环部连续加膜部间断缝合。5例用带血管蒂的肋间肌包埋吻合口。结果围术期有3例出现胸腔积液;1例出现乳糜胸;随访2例出现刺激性咳嗽,镜下见肉芽组织增生。结论支气管纤维镜是明确陈旧性创伤性主支气管断裂诊断的重要手段;术中须彻底切除狭窄段支气管瘢痕,用prolene线行环部连续加膜部间断缝合既简化操作且临床效果满意。