Effects of laparoscopy-assisted radical gastrectomy on the expression of intercellular adhesion molecule β1 and integrin 1 in peritoneal mesothelial cells and its significance

Objective To investigate the changes of the expression of intercellular adhesion molecule-1 (ICAM-1) and integrin β1 in peritoneal mesothelial cells during laparoscopy-assisted radical gastrectomy (LARG) and to explore the possible effects of LARG on the peritoneal metastasis. Methods From April to August 2008, LARG was performed for 26 patients with gastric cancer (laparoscopy group), while 20 cases underwent open radical gastrectomy (open group). Peritoneum of right upper belly was collected at 3 operation time points (the beginning, 2 hours, 4 hours). The expressions of ICAM-1 and integrin β1 in peritoneal mesothelial cells at 3 time points were detected by immunohistochemistry. Results With the operation prolonging, the expression of ICAM-1 and integrin β1 was increased gradually in both LARG and open groups. The expression of integrin β1 in two groups was obviously increased at 4-hour time point as compared to the beginning (P<0.05). Besides, there were no significant differences of these two adhesion molecules among the three operation time points between two groups (P>0.05). Conclusions Compared with open surgery, LARG is not associated with a greater effect on the expression of ICAM-1 and integrin β1 in peritoneal mesothelial cells, and may not promote peritoneal metastasis of gastric cancer through increasing the expression of adhesion molecule in peritoneal mesothelial cells.     

Effects of laparoscopy-assisted radical gastrectomy on the expression of intercellular adhesion molecule β1 and integrin 1 in peritoneal mesothelial cells and its significance

Objective To investigate the changes of the expression of intercellular adhesion molecule-1 (ICAM-1) and integrin β1 in peritoneal mesothelial cells during laparoscopy-assisted radical gastrectomy (LARG) and to explore the possible effects of LARG on the peritoneal metastasis. Methods From April to August 2008, LARG was performed for 26 patients with gastric cancer (laparoscopy group), while 20 cases underwent open radical gastrectomy (open group). Peritoneum of right upper belly was collected at 3 operation time points (the beginning, 2 hours, 4 hours). The expressions of ICAM-1 and integrin β1 in peritoneal mesothelial cells at 3 time points were detected by immunohistochemistry. Results With the operation prolonging, the expression of ICAM-1 and integrin β1 was increased gradually in both LARG and open groups. The expression of integrin β1 in two groups was obviously increased at 4-hour time point as compared to the beginning (P<0.05). Besides, there were no significant differences of these two adhesion molecules among the three operation time points between two groups (P>0.05). Conclusions Compared with open surgery, LARG is not associated with a greater effect on the expression of ICAM-1 and integrin β1 in peritoneal mesothelial cells, and may not promote peritoneal metastasis of gastric cancer through increasing the expression of adhesion molecule in peritoneal mesothelial cells.     

Effects of laparoscopy-assisted radical gastrectomy on the expression of intercellular adhesion molecule β1 and integrin 1 in peritoneal mesothelial cells and its significance

Objective To investigate the changes of the expression of intercellular adhesion molecule-1 (ICAM-1) and integrin β1 in peritoneal mesothelial cells during laparoscopy-assisted radical gastrectomy (LARG) and to explore the possible effects of LARG on the peritoneal metastasis. Methods From April to August 2008, LARG was performed for 26 patients with gastric cancer (laparoscopy group), while 20 cases underwent open radical gastrectomy (open group). Peritoneum of right upper belly was collected at 3 operation time points (the beginning, 2 hours, 4 hours). The expressions of ICAM-1 and integrin β1 in peritoneal mesothelial cells at 3 time points were detected by immunohistochemistry. Results With the operation prolonging, the expression of ICAM-1 and integrin β1 was increased gradually in both LARG and open groups. The expression of integrin β1 in two groups was obviously increased at 4-hour time point as compared to the beginning (P<0.05). Besides, there were no significant differences of these two adhesion molecules among the three operation time points between two groups (P>0.05). Conclusions Compared with open surgery, LARG is not associated with a greater effect on the expression of ICAM-1 and integrin β1 in peritoneal mesothelial cells, and may not promote peritoneal metastasis of gastric cancer through increasing the expression of adhesion molecule in peritoneal mesothelial cells.     

Effects of laparoscopy-assisted radical gastrectomy on the expression of intercellular adhesion molecule β1 and integrin 1 in peritoneal mesothelial cells and its significance

Objective To investigate the changes of the expression of intercellular adhesion molecule-1 (ICAM-1) and integrin β1 in peritoneal mesothelial cells during laparoscopy-assisted radical gastrectomy (LARG) and to explore the possible effects of LARG on the peritoneal metastasis. Methods From April to August 2008, LARG was performed for 26 patients with gastric cancer (laparoscopy group), while 20 cases underwent open radical gastrectomy (open group). Peritoneum of right upper belly was collected at 3 operation time points (the beginning, 2 hours, 4 hours). The expressions of ICAM-1 and integrin β1 in peritoneal mesothelial cells at 3 time points were detected by immunohistochemistry. Results With the operation prolonging, the expression of ICAM-1 and integrin β1 was increased gradually in both LARG and open groups. The expression of integrin β1 in two groups was obviously increased at 4-hour time point as compared to the beginning (P<0.05). Besides, there were no significant differences of these two adhesion molecules among the three operation time points between two groups (P>0.05). Conclusions Compared with open surgery, LARG is not associated with a greater effect on the expression of ICAM-1 and integrin β1 in peritoneal mesothelial cells, and may not promote peritoneal metastasis of gastric cancer through increasing the expression of adhesion molecule in peritoneal mesothelial cells.     

Effects of laparoscopy-assisted radical gastrectomy on the expression of intercellular adhesion molecule β1 and integrin 1 in peritoneal mesothelial cells and its significance

Objective To investigate the changes of the expression of intercellular adhesion molecule-1 (ICAM-1) and integrin β1 in peritoneal mesothelial cells during laparoscopy-assisted radical gastrectomy (LARG) and to explore the possible effects of LARG on the peritoneal metastasis. Methods From April to August 2008, LARG was performed for 26 patients with gastric cancer (laparoscopy group), while 20 cases underwent open radical gastrectomy (open group). Peritoneum of right upper belly was collected at 3 operation time points (the beginning, 2 hours, 4 hours). The expressions of ICAM-1 and integrin β1 in peritoneal mesothelial cells at 3 time points were detected by immunohistochemistry. Results With the operation prolonging, the expression of ICAM-1 and integrin β1 was increased gradually in both LARG and open groups. The expression of integrin β1 in two groups was obviously increased at 4-hour time point as compared to the beginning (P<0.05). Besides, there were no significant differences of these two adhesion molecules among the three operation time points between two groups (P>0.05). Conclusions Compared with open surgery, LARG is not associated with a greater effect on the expression of ICAM-1 and integrin β1 in peritoneal mesothelial cells, and may not promote peritoneal metastasis of gastric cancer through increasing the expression of adhesion molecule in peritoneal mesothelial cells.     

Effects of laparoscopy-assisted radical gastrectomy on the expression of intercellular adhesion molecule β1 and integrin 1 in peritoneal mesothelial cells and its significance

Objective To investigate the changes of the expression of intercellular adhesion molecule-1 (ICAM-1) and integrin β1 in peritoneal mesothelial cells during laparoscopy-assisted radical gastrectomy (LARG) and to explore the possible effects of LARG on the peritoneal metastasis. Methods From April to August 2008, LARG was performed for 26 patients with gastric cancer (laparoscopy group), while 20 cases underwent open radical gastrectomy (open group). Peritoneum of right upper belly was collected at 3 operation time points (the beginning, 2 hours, 4 hours). The expressions of ICAM-1 and integrin β1 in peritoneal mesothelial cells at 3 time points were detected by immunohistochemistry. Results With the operation prolonging, the expression of ICAM-1 and integrin β1 was increased gradually in both LARG and open groups. The expression of integrin β1 in two groups was obviously increased at 4-hour time point as compared to the beginning (P<0.05). Besides, there were no significant differences of these two adhesion molecules among the three operation time points between two groups (P>0.05). Conclusions Compared with open surgery, LARG is not associated with a greater effect on the expression of ICAM-1 and integrin β1 in peritoneal mesothelial cells, and may not promote peritoneal metastasis of gastric cancer through increasing the expression of adhesion molecule in peritoneal mesothelial cells.     

Effects of laparoscopy-assisted radical gastrectomy on the expression of intercellular adhesion molecule β1 and integrin 1 in peritoneal mesothelial cells and its significance

Objective To investigate the changes of the expression of intercellular adhesion molecule-1 (ICAM-1) and integrin β1 in peritoneal mesothelial cells during laparoscopy-assisted radical gastrectomy (LARG) and to explore the possible effects of LARG on the peritoneal metastasis. Methods From April to August 2008, LARG was performed for 26 patients with gastric cancer (laparoscopy group), while 20 cases underwent open radical gastrectomy (open group). Peritoneum of right upper belly was collected at 3 operation time points (the beginning, 2 hours, 4 hours). The expressions of ICAM-1 and integrin β1 in peritoneal mesothelial cells at 3 time points were detected by immunohistochemistry. Results With the operation prolonging, the expression of ICAM-1 and integrin β1 was increased gradually in both LARG and open groups. The expression of integrin β1 in two groups was obviously increased at 4-hour time point as compared to the beginning (P<0.05). Besides, there were no significant differences of these two adhesion molecules among the three operation time points between two groups (P>0.05). Conclusions Compared with open surgery, LARG is not associated with a greater effect on the expression of ICAM-1 and integrin β1 in peritoneal mesothelial cells, and may not promote peritoneal metastasis of gastric cancer through increasing the expression of adhesion molecule in peritoneal mesothelial cells.     

Effects of laparoscopy-assisted radical gastrectomy on the expression of intercellular adhesion molecule β1 and integrin 1 in peritoneal mesothelial cells and its significance

Objective To investigate the changes of the expression of intercellular adhesion molecule-1 (ICAM-1) and integrin β1 in peritoneal mesothelial cells during laparoscopy-assisted radical gastrectomy (LARG) and to explore the possible effects of LARG on the peritoneal metastasis. Methods From April to August 2008, LARG was performed for 26 patients with gastric cancer (laparoscopy group), while 20 cases underwent open radical gastrectomy (open group). Peritoneum of right upper belly was collected at 3 operation time points (the beginning, 2 hours, 4 hours). The expressions of ICAM-1 and integrin β1 in peritoneal mesothelial cells at 3 time points were detected by immunohistochemistry. Results With the operation prolonging, the expression of ICAM-1 and integrin β1 was increased gradually in both LARG and open groups. The expression of integrin β1 in two groups was obviously increased at 4-hour time point as compared to the beginning (P<0.05). Besides, there were no significant differences of these two adhesion molecules among the three operation time points between two groups (P>0.05). Conclusions Compared with open surgery, LARG is not associated with a greater effect on the expression of ICAM-1 and integrin β1 in peritoneal mesothelial cells, and may not promote peritoneal metastasis of gastric cancer through increasing the expression of adhesion molecule in peritoneal mesothelial cells.     

Effects of laparoscopy-assisted radical gastrectomy on the expression of intercellular adhesion molecule β1 and integrin 1 in peritoneal mesothelial cells and its significance

Objective To investigate the changes of the expression of intercellular adhesion molecule-1 (ICAM-1) and integrin β1 in peritoneal mesothelial cells during laparoscopy-assisted radical gastrectomy (LARG) and to explore the possible effects of LARG on the peritoneal metastasis. Methods From April to August 2008, LARG was performed for 26 patients with gastric cancer (laparoscopy group), while 20 cases underwent open radical gastrectomy (open group). Peritoneum of right upper belly was collected at 3 operation time points (the beginning, 2 hours, 4 hours). The expressions of ICAM-1 and integrin β1 in peritoneal mesothelial cells at 3 time points were detected by immunohistochemistry. Results With the operation prolonging, the expression of ICAM-1 and integrin β1 was increased gradually in both LARG and open groups. The expression of integrin β1 in two groups was obviously increased at 4-hour time point as compared to the beginning (P<0.05). Besides, there were no significant differences of these two adhesion molecules among the three operation time points between two groups (P>0.05). Conclusions Compared with open surgery, LARG is not associated with a greater effect on the expression of ICAM-1 and integrin β1 in peritoneal mesothelial cells, and may not promote peritoneal metastasis of gastric cancer through increasing the expression of adhesion molecule in peritoneal mesothelial cells.     

Effects of laparoscopy-assisted radical gastrectomy on the expression of intercellular adhesion molecule β1 and integrin 1 in peritoneal mesothelial cells and its significance

Objective To investigate the changes of the expression of intercellular adhesion molecule-1 (ICAM-1) and integrin β1 in peritoneal mesothelial cells during laparoscopy-assisted radical gastrectomy (LARG) and to explore the possible effects of LARG on the peritoneal metastasis. Methods From April to August 2008, LARG was performed for 26 patients with gastric cancer (laparoscopy group), while 20 cases underwent open radical gastrectomy (open group). Peritoneum of right upper belly was collected at 3 operation time points (the beginning, 2 hours, 4 hours). The expressions of ICAM-1 and integrin β1 in peritoneal mesothelial cells at 3 time points were detected by immunohistochemistry. Results With the operation prolonging, the expression of ICAM-1 and integrin β1 was increased gradually in both LARG and open groups. The expression of integrin β1 in two groups was obviously increased at 4-hour time point as compared to the beginning (P<0.05). Besides, there were no significant differences of these two adhesion molecules among the three operation time points between two groups (P>0.05). Conclusions Compared with open surgery, LARG is not associated with a greater effect on the expression of ICAM-1 and integrin β1 in peritoneal mesothelial cells, and may not promote peritoneal metastasis of gastric cancer through increasing the expression of adhesion molecule in peritoneal mesothelial cells.     

烧伤后粘附分子介导中性粒细胞粘附对肺血管通透性的影响

目的观察比较烧伤血清及烧伤后中性白细胞（ＰＭＮ）对肺血管通透性的影响,分析ＰＭＮ粘附及粘附分子ＣＤ１１ｂ／ＣＤ１８在该影响中的介导作用。方法应用离体肺灌流技术,通过肺重量增加（ＬＷＧ）、液体滤过系数（Ｋｆ）和通透性表面积乘积（ＰＳ）分别观察肺水肿程度、肺血管对小分子物质和大分子物质的通透性。结果烧伤血清能使ＬＷＧ、Ｋｆ和ＰＳ明显增加,以Ｋｆ增加最为明显;烧伤后ＰＭＮ也能使Ｋｆ和ＰＳ增加,以ＰＳ增加为明显;用单抗封闭烧伤后ＰＭＮ膜上ＣＤ１１ｂ／ＣＤ１８后,ＰＭＮ在肺血管内的滞留减少,Ｋｆ和ＰＳ值增加被抑制,并以ＰＳ改变为显著。结论（１）被激活的ＰＭＮ释放的介质类物质如氧自由基、蛋白酶等物质对肺微血管内皮细胞（ＰＭＥＣ）的损伤作用部分依赖于ＰＭＮ与内皮细胞的粘附。（２）烧伤后被激活的ＰＭＮ释放的介质类物质主要介导肺血管对小分子物质通透性的影响。烧伤后ＰＭＮ与肺微血管内皮细胞（ＰＭＥＣ）的粘附除了使介质类物质的作用放大外,还介导肺血管对大分子物质通透作用。（３）ＰＭＮ膜上ＣＤ１１ｂ／ＣＤ１８分子可能通过与ＰＭＥＣ细胞间粘附分子的结合,本身具有对内皮细胞的生物学调控作用     

烧伤后白细胞与内皮细胞粘附分子介导作用的研究

为研究白细胞粘附依赖于细胞粘附分子的介导作用,作者通过离体实验观察分析了烧伤血清对外周血中性粒细胞（ＰＭＮ）ＣＤ１１ｂ／ＣＤ１８表达的影响及ＣＤ１１ｂ／ＣＤ１８在烧伤后ＰＭＮ粘附中的介导作用。结果表明：（１）烧伤血清使ＰＭＮＣＤ１１ｂ／ＣＤ１８分子表达和ＰＭＮ与肺微血管内皮细胞（ＰＭＥＣ）的粘附率增高。（２）ＣＤ１１ｂ／ＣＤ１８单抗不仅能使正常ＰＭＮ与ＰＭＥＣ的粘附率下降５０％,也使烧伤血清激活的ＰＭＮ与ＰＭＥＣ粘附率下降至烧伤血清激活前水平。我们认为,严重烧伤能使外周血ＰＭＮＣＤ１１ｂ／ＣＤ１８表达明显增高,ＣＤ１１ｂ／ＣＤ１８不但介导基础状态下的ＰＭＮ粘附,更是介导烧伤后引起的大量ＰＭＮ与ＰＭＥＣ粘附的主要分子。     

肝细胞肝癌患者血清和组织细胞间粘附分子-1及其mRNA的表达

目的了解肝细胞肝癌患者血清和组织细胞间粘附分子-1(ICAM-1)及其mRNA的表达,明确血清可溶性ICAM-1(sICAM-1)的来源。方法应用酶联免疫吸附试验(ELISA)分析、免疫组织化学及逆转录-聚合酶链式反应(RT-PCR)等技术,测定151例肝细胞肝癌(HCC)血清、组织ICAM-1及其mRNA的表达,并与甲胎蛋白(AFP)进行同步分析。结果151例HCCsICAM-1明显高于各对照组,73%的患者sICAM-1＞1000μg/L。肝癌组织中ICAM-1的表达阳性率为94.2%,AFP为62.9%。ICAM-1mRNA的表达与肝细胞的恶变与否及患者血清sICAM-1的水平密切相关,它在癌组织及癌旁组织中的表达率分别为65.1%和30.2%,正常肝组织均无表达。结论HCC患者血清sICAM-1的高水平与其蛋白分子在组织中的过度表达一致,并受其相关基因的调控,肝细胞恶变则是sICAM-1表达的病理学基础。测定sICAM-1对监测HCC及其术后复发具有一定的临床意义。     

肾移植后尿中可溶性细胞间粘附分子-1浓度监测的临床意义

目的：评价肾移植后患者尿中可溶性细胞间粘附分子－１（ｓＩＣＡＭ－１）浓度变化的临床意义。方法：动态检测２０例肾移植患者术后２个月内尿中ｓＩＣＡＭ－１浓度的变化。结果：急性排斥反应（ＡＲ）时,ｓＩＣＡＭ－１的升高较临床诊断提早数天,并且显著高于环孢素Ａ肾中毒组;对甲基氢化泼尼松敏感的排斥反应,抗排斥治疗数天后ｓＩＣＡＭ－１下降到排斥前水平。结论：肾移植术后动态监测受者尿中ｓＩＣＡＭ－１浓度有助于ＡＲ     

细胞间粘附分子-1的反义寡核苷酸在异种心脏移植中的作用

目的探讨细胞间粘附分子1的反义寡核苷酸(ICAM1ASO)在小鼠→大鼠的异种心脏移植中对ICAM1表达以及排斥反应的作用。方法BALB/c小鼠和Lewis大鼠分别作为供者和受者,随机配对建立小鼠→大鼠的异种心脏移植模型。按照供者术前处理不同分为双蒸馏水对照组、寡核苷酸对照组和ICAM1ASO组。各组供者术前6h分别从右颈外静脉注射双蒸馏水、寡核苷酸和ICAM1ASO。术后48h各组取5只受者切取供心进行病理学检查;采用免疫组织化学方法对供心组织ICAM1的表达进行观察;半定量逆转录聚合酶链(RTPCR)法对ICAM1mRNA的表达进行定量分析。每组中余下5只受者继续观察直至供心停跳,记录供心存活时间。结果双蒸馏水对照组和寡核苷酸对照组在移植后48h可观察到供心心跳减慢,出现不同程度的心律不齐、心律紊乱,供心搏动无力;供心病理学检查显示心脏组织中广泛间质充血、水肿、出血及血栓形成,部分心肌髓样变性及溶解并伴有炎性细胞浸润;与移植前BALB/c小鼠心脏对比,内皮细胞和心肌细胞ICAM1表达明显增强;ICAM1mRNA表达也明显增加;供心存活时间分别为(53.6±3.58)h和(55.0±3.16)h。ICAM1ASO组供心ICAM1在蛋白水平和mRNA水平的表达均减弱;排斥反应程度也明显减轻;供心存活时间为(66.4±2.61)h;与寡核苷酸对照组和双蒸馏水对照组比较,差异有统计学意义。结论ICAM1ASO能明显抑制异种移植中供心ICAM1的表达,抑制异种移植后排斥反应的发生和发展,延长移植物的存活时间,其作用具有高度序列特异性。     

细胞间粘附分子-1的反义寡核苷酸在小鼠心脏移植中的作用

目的 探讨细胞间粘附分子-1(ICAM-1)的反义寡核苷酸(ICAM-1-ASO)在小鼠心脏移植中对ICAM-1表达以及在排斥反应中的作用.方法 以BALB/c小鼠为供者,C57小鼠为受者,建立颈部异位心脏移植模型,移植后将受者随机分为3组,每组10只.分别为单纯移植组、对照寡核苷酸组(对照ODN)和ICAM-1-ASO组.各组移植后24 h开始经受者静脉分别注射双蒸水0.3 ml、对照ODN 10 mg/kg和ICAM-1-ASO 10 mg/kg,每天1次,连续5 d.移植后第8天各组随机取5只受者切取移植心,进行病理学检查;采用免疫组织化学方法对移植心组织中ICAM-1的表达进行观察;采用半定量逆转录聚合酶链反应(RT-PCR)对ICAM-1mRNA表达进行定量分析.每组中余下的小鼠继续观察直至移植心停跳,记录各组移植心的存活时间.结果 单纯移植组心脏移植后第8天可观察到明显的排斥反应,移植心心跳减慢、心律不齐、心律紊乱、搏动无力;病理学检查可见大量的淋巴细胞浸润,心肌间质水肿及大片心肌坏死;与移植前对比,内皮细胞和心肌细胞ICAM-1表达明显增强;ICAM-1mRNA表达也明显增加;移植心存活时间平均为(9.8±1.48)d.对照ODN组与单纯移植组差异无统计学意义.而ICAM-1-ASO组与单纯移植组相比,移植心ICAM-1的表达明显减弱,淋巴细胞浸润明显减少,排斥反应程度减轻;移植后第9天心律基本规整,偶有心律不齐,心跳力度较单纯移植组增强;移植心存活时间明显延长至(14.6±1.14)d.结论 ICAM-1-ASO抑制移植心组织中ICAM-1的表达和淋巴细胞的浸润,抑制移植后排斥反应的发生和发展,改善移植物的功能,延长移植物的存活时间,其作用具有序列特异性.     

缺血再灌注对大鼠肺细胞间粘附分子-1表达的影响

目的 观察缺血再灌注（Ｉ／Ｒ）对肺组织细胞间粘附分子－１（ＩＣＡＭ－１）表达的影响，分析ＩＣＡＭ－１表达与肺内中性粒细胞浸润的关系。方法 Ｗｉｓｔａｒ大鼠单肺原位热缺血再灌注损伤模型分７组，左肺缺血９０ｍｉｎ，再灌注时间分别为０、１、２、４、８、１６、２４ｈ。逆转录－聚合酶链式反应（ＲＴ－ＰＣＲ）法及Ｗｅｓｔｅｒｎ ｂｌｏｔ法检测肺组织ＩＣＡＭ－１ｍＲＮＡ及蛋白表达，测定各组肺组织髓过氧化物酶活性     

体外与非体外循环下冠脉旁路术中肺组织黏附分子-1mRNA的表达及其意义

目的观察体外循环下冠状动脉旁路移植术（CABG）及非体外循环冠状动脉旁路移植术（0PQ蛆）术中肺组织细胞间黏附分子-1 mRNA（ICAM-1 mRNA）的表达及细胞定位。方法将冠状动脉粥样硬化性心脏病患者24例随机分为OPCAB组（8例）、CABG组（8例）和CABG＋N-乙酰半胱氨酸（NAC）组（8例）。所有肺组织标本均采用右上肺边缘组织制作,采用免疫组化、原位杂交、计算机图像分析、病理学观察方法,探讨术中肺组织ICAM-1 mRNA的表达、分布以及组织细胞超微结构变化。结果OPCAB组,ICAM-1 mRNA在所取组织中仅少量表达。CABG组。肺组织ICAM-1 mRNA表达强度明显增强,阳性细胞主要定位于支气管内皮细胞、肺间质细胞、血管内皮细胞及血管壁组织细胞。CABG＋N-乙酰半胱氨酸组ICAM-1 mRNA表达明显受抑。结论非体外循环下CABG能明显减少ICAM-1 mRNA表达。体外循环下肺内ICAM-1 mRNA的表达增加是CPB后CABG术后肺损伤发病的分子基础之一。     

大肠癌发病风险与细胞间黏附分子-1基因多态性的关系

目的 探讨中国华北地区汉族人群中细胞间黏附分子-1(ICAM-1)基因编码区单核苷酸多态性(SNPs)与大肠癌发病风险的关系.方法 采用序列特异-聚合酶链反应(PCR-SSP)方法检测87例大肠癌患者(大肠癌组)和102例正常对照者(对照组)ICAM-1基因型和等位基因频率的分布.结果 大肠癌组和对照组ICAM-1-241G/R多态的基因型均为G/G,未检测出R241等位基因.ICAM-1-469K/E多态3种基因型频率(K/K,K/E,E/E)在大肠癌组和对照组中分别是57.47%(50/87)、32.18%(28/87)、10.35%(9/87)和42.16%(43/102)、43.14%(44/102)、14.70%(15/102),与K/E+E/E基因型比较,K/K基因型罹患大肠癌的风险明显增加(OR=1.85,x2=4.406,95%CI:1.04～3.31,P＜0.05);与E等位基因比较,K等位基因携带者增加大肠癌的发病风险(OR=1.58,x2=4.194,95%CI:1.02～2.46,P＜0.05).ICAM-1-469K/E多态的K/K基因型在大肠癌组中与肿瘤分化程度有关(x2=4.564,P＜0.05);而与临床其他病理参数包括性别、年龄、肿瘤部位及Dukes分期无关(P＞0.05).结论 ICAM-1-241G/R多态在我国华北地区汉族人群中不存在多态性;ICAM-1-469K/E多态K等位基因或K/K基因型的存在可明显增加大肠癌的发病风险;ICAM-1-469K/E多态K/K基因型与肿瘤分化程度有关.     

细胞间粘附分子-l在机械通气致肺损伤中的作用

目的 探讨细胞间粘附分子－１（ＩＣＡＭ－１）在机械通气致肺损伤中的作用。方法 ２４只普通健康小猪随机等分为对照组、低潮气量组（Ａ组）、正常潮气量组（Ｂ组）及大潮气量组（Ｃ组）。采用持续给予小猪不同潮气量通气模型,利用免疫组织化学技术、酶联免疫法和髓过氧化物酶（ＭＰＯ）测定法,分别检测不同潮气量组通气１ｄ、３ｄ、７ｄ后肺血管内皮细胞表面ＩＣＡＭ－１的表达量,血清和肺组织匀浆中肿瘤坏死因子α（ＴＮＦ－