生长抑素治疗急性胰腺炎的临床研究

目的　探讨生长抑素治疗急性胰腺炎的临床效果。方法　应用人工合成的生长抑素类似物———奥曲肽治疗急性胰腺炎患者 38例 ,结果与 5 9例非奥曲肽治疗组对照。观察了两组以及奥曲肽治疗前后血清淀粉酶及腹腔液淀粉酶的含量 ,比较两组并发症的发生率。结果　奥曲肽治疗组中 ,17例急性水肿性胰腺炎 (AEP)患者、2 1例急性坏死性胰腺炎 (ANP)患者血清淀粉酶及 19例ANP患者腹腔液淀粉酶含量在治疗前分别为 :(932± 6 7)IU/L、(12 47± 43)IU/L、(988± 47)IU/L ;治疗后 48h分别为 (2 74± 5 7)IU/L、(432± 37)IU/L、(176± 32 )IU/L ,治疗前后差异均有显著意义 (P均 <0 0 5 )。奥曲肽治疗组中 2 1例ANP患者发生并发症 18例次 ,非奥曲肽治疗组 2 6例ANP患者发生并发症 38例次。结论　奥曲肽能有效降低血清淀粉酶和腹腔液淀粉酶的活性 ,改善临床症状 ,降低并发症的发生率。     

生长激素对急性坏死性胰腺炎大鼠肠粘膜上皮细胞凋亡的影响

目的观察生长激素 (GH)对急性坏死性胰腺炎 (ANP)大鼠早期肠粘膜上皮细胞凋亡的调节作用。方法ANP模型大鼠分ANP组和ANP加GH治疗组 ,假手术组 (SO组 )作为对照。分别用DNA琼脂糖凝胶电泳、流式细胞仪分析和dUTP缺口末端标记法研究肠粘膜细胞凋亡 ,免疫组织化学方法检测肠粘膜凋亡相关蛋白FasL及Bax表达。结果ANP大鼠各时点肠粘膜DNA电泳均可见典型的凋亡“梯形”条带 ,而GH治疗组仅于 3h出现“梯形”条带。术后 3h、6h、12h、2 4h肠粘膜脱落细胞凋亡比例分别为 :SO组为 (5 4± 4) %、(2 8± 6 ) %、(39± 5 ) %、(2 9± 11) % ,ANP组为 (5 0± 11) %、(80± 9) %、(4 8± 17) %、(5 0± 10 ) % ,术后 6h较SO组明显增高 (P <0 0 1) ;GH治疗组 ,(4 8± 11) %、(2 7± 15 ) %、(4 2± 7) %、(30± 10 ) % ,与SO组各时点比较差异无显著意义 ,且术后 6h较ANP组降低(P <0 0 1)。术后 3h、6h、12h、2 4h各时点肠粘膜细胞凋亡指数分别为 :SO组为 (6± 2 )、(8± 2 )、(11±1)、(5± 1) ,ANP组为 (18± 4)、(2 0± 3)、(15± 2 )、(14± 2 ) ,较SO组明显增高 (P <0 0 1) ;GH治疗组为(10± 2 )、(10± 2 )、(13± 2 )、(14± 4) ,其中术后 3h、6h较ANP组降低 (P <0 0 1)。FasL及Bax蛋白在假手术组呈弱表达 ,AN     

选择性肠道脱污染预防急性坏死性胰腺炎继发感染的实验研究

目的　通过急性坏死性胰腺炎(ANP)动物模型,探讨选择性消化道脱污染(SDD)预防胰腺继发感染的作用。方法　Wistar大鼠60只,向总胆胰管逆行输入人工胆汁复制ANP模型,随机设立正常对照组、假手术对照组、ANP组和SDD治疗组,观察胰肠组织学、胰淀粉酶、肠道菌群、脏器细菌移位率和死亡率的变化。结果　SDD使ANP动物胰腺和小肠粘膜病理改变减轻,胰淀粉酶水平下降(P＜0.05),并使ANP时肠道菌群的紊乱状态得以恢复,肠粘膜和肠内容物双歧杆菌/大肠杆菌比值(B/E)分别由-0.37±0.72升至1.73±1.23(P＜0.01)和由0.88±0.77升至无穷大。SDD组72h脏器细菌移位率由59.5%降至33.3%(P＜0.05),72h死亡率由58.8%降至14.3%(P=0.005)。结论　SDD通过减轻肠道菌群紊乱状态,减少细菌移位,有利于预防ANP继发感染。     

生长抑素对猴急性坏死性胰腺炎的治疗作用

目的 观察生长抑素（ＳＳ）对猴实验急性坏死性胰腺炎（ＡＮＰ）的治疗作用。方法 经胰管开口逆行注入胆汁与胰蛋白酶混合液，制成ＡＮＰ模型。１２只猴平均分为两组：对照组不给予ＳＳ治疗，治疗组模型成后１小时开始持续以每小时１０μｇ／ｋｇ输注ＳＳ。结果 对照组死亡率１００％，平均存活时间为３０．８±８．８小时；治疗组死亡率为５０％，平均生存时间５３．３±２３．５小时，Ｐ〈０．００１；治疗组与对照组相比，血淀     

生长抑素减轻大鼠急性坏死性胰腺炎的肠屏障损害

目的　观察生长抑素对大鼠急性坏死性胰腺炎 (ANP)肠屏障损害和肠道内毒素移位的影响。方法　采用胰管逆行灌注法复制大鼠ANP模型 ,随机分为正常对照组 (n =6 )、假手术组(n =18)、ANP组 (n =2 0 )和生长抑素治疗组 (n =19)。观察胰腺病理、血淀粉酶、肿瘤坏死因子(TNFα)和白细胞介素 (IL) 1β、肠上皮细胞间紧密连接、肠通透性 (血浆D 乳酸 )、循环内毒素和病死率的变化。结果　生长抑素减轻了ANP早期胰腺病理改变〔8h组织学评分由 (4 2± 0 3)降至 (2 0±0 4) ,P <0 0 1〕 ;72h血淀粉酶由 (6 2 31± 44 6 1)U/L降至 (2 6 48± 1798)U/L ,P <0 0 5 ;72hTNFα由(4 7± 2 4)pg/ml降至 (2 3± 2 1)pg/ml,IL 1β由 (10 3± 40 )pg/ml降至 (5 0± 2 4)pg/ml,P均 <0 0 5 ;肠上皮细胞间紧密连接的破坏减轻 ;2 4h血浆D 乳酸由 (14 7± 4 9) μg/ml降至 (8 0± 4 2 ) μg/ml,P <0 0 1;2 4h血浆内毒素由 (0 6 11± 0 2 10 )EU/ml降至 (0 336± 0 110 )EU/ml,P <0 0 1;ANP大鼠 72h病死率由 5 9%降至 17% ,P <0 0 5。结论　生长抑素可减轻ANP大鼠的肠屏障损害 ,对肠道内毒素移位有抑制作用 ,可降低ANP大鼠的病死率。     

地塞米松治疗急性坏死性胰腺炎的实验研究

目的探讨地塞米松治疗急性坏死性胰腺炎(ANP)的机理.方法经胰胆管逆行注射牛磺胆酸钠法诱导SD大鼠ANP,治疗组(n=24)模型诱导30 min后注射地塞米松0.2 mg/100 g鼠重,对照组(n=24)注射等量生理盐水,两组分别于4 h和12 h各处死8只鼠测血清肿瘤坏死因子α(TNFα)、淀粉酶,并行胰腺坏死程度评分、检测胰腺腺胞细胞凋亡,余下8只鼠作生存期观察.结果治疗组4 h、12 h TNFα分别为(17.8±2.7) pg/ml和(8.5±1.6) pg/ml,胰腺腺胞细胞凋亡指数分别为(36.94±4.12)%和(32.79±3.31)%,生存时间为(33.4±21.5) h; 对照组上述各项指标依次为(53.6±18.7) pg/ml和(37.2±11.1) pg/ml (P<0.01)、(4.37±1.24)%和(5.12±2.11)%(P<0.01)及(14.6±5.7) h (P<0.01),两组胰腺坏死程度评分差异有显著性意义(P<0.01).结论地塞米松能通过抑制TNFα调控细胞凋亡,细胞凋亡对胰腺具有保护作用.     

急性坏死性胰腺炎肠黏膜NFκB介导的细胞因子过度表达及生长激素的作用

目的　本研究旨在动态观察急性坏死性胰腺炎 (ANP)大鼠肠黏膜核因子κB(NFκB)及其介导的细胞因子 ,包括肿瘤坏死因子α(TNFα)、白介素 1(IL 1β)、诱导型一氧化氮合成酶 (iNOS)、细胞间黏附分子 (ICAM 1)和单核细胞趋化蛋白 (MCP 1)mRNA的变化 ,探讨其在ANP并发肠道衰竭发生中的作用 ;并观察生长激素 (GH)对NFκB活化及细胞因子表达的下调作用。方法　SD大鼠72只 ,随机分为三组 :假手术组 (SO) ;ANP组 ;ANP +GH组。GH治疗组术后皮下注射GH溶液(0 75U/kg体重 ) ,非治疗组则注射等容积生理盐水作对照。大鼠胆胰管内逆行注射 5 %牛磺胆酸钠溶液制备ANP模型。提取肠组织RNA ,逆转录聚合酶链反应 (RT PCR)研究术后 6,12 ,2 4h肠黏膜TNFα、IL 1β、iNOS、ICAM 1、MCP 1mRNA表达。术后 3 ,6,12 ,2 4h免疫组化法检测肠黏膜NFκB的活化情况。结果　ANP组大鼠肠黏膜TNFα、IL 1β、iNOS、ICAM 1和MCP 1mRNA表达较SO组增高 ,其中TNFα和IL 1βmRNA表达于术后 6h达峰值 ,且较SO组差异显著 (TNFα :1 0 3± 0 17vs0 3 4± 0 0 7;IL 1β :0 91± 0 0 8vs 0 3 9± 0 0 6,P <0 0 5 ) ;iNOS和ICAM 1mRNA表达于术后 12h达峰值 ,较SO组差异显著 (iNOS :0 62± 0 10vs 0 0 4± 0 0 2 ;ICAM 1:1 48± 0 3 3v     

雷公藤多甙联合生长抑素治疗对大鼠急性坏死性胰腺炎肠道细菌移位的影响

目的 探讨雷公藤多甙联合生长抑素治疗对大鼠急性坏死性胰腺炎(ANP)肠道细菌移位的影响. 方法 逆行胰胆管穿刺注射3.5%牛磺胆酸钠(0.2 ml/100 g)诱导ANP大鼠模型.分为5组:假手术组(SO)、坏死组(ANP)、生长抑素治疗组(ANP+S)、雷公藤多甙治疗组(ANP+T)、雷公藤多甙+生长抑素治疗组(ANP+T+S).术后禁食12 h,不禁水.各组均随机标记6只观察术后生存时间.术后24h,观察血清淀粉酶、血清脂肪酶活性,血浆内毒素水平,脏器细菌培养结果,胰腺和回肠黏膜病理学变化及大鼠存活率. 结果 雷公藤多甙与生长抑素联合治疗ANP大鼠,可以显著降低血清淀粉酶、血清脂肪酶活性;减轻胰腺组织和肠黏膜炎症细胞浸润、水肿;降低血浆内毒素水平和脏器细菌培养阳性率;提高ANP大鼠存活率. 结论 ANP大鼠存在肠道细菌移位;雷公藤多甙联合生长抑素的治疗可减轻ANP大鼠胰腺和肠道损伤,加强肠道的生物学屏障,降低肠源性细菌及内毒素移位发生率,阻止ANP的发展.     

急性胰腺炎时胰腺缺血与细胞因子相关性的实验研究

目的探讨大鼠急性胰腺炎(AP)时胰腺缺血和细胞因子过度释放的关系.方法以牛磺胆酸钠诱导大鼠AP,20只为急性水肿性胰腺炎(AEP)模型、20只为急性坏死性胰腺炎(ANP)模型,另取10只正常大鼠作为对照.术后12 h处死各组10只大鼠,取血和胰腺组织,检测肿瘤坏死因子α(TNF-α)和白细胞介素10(IL-10)水平,观察胰腺病理变化,并以多普勒超声仪检测大鼠胰腺血流(PBF).结果AEP大鼠血清和胰腺中TNF-α和IL-10水平均升高,分别为(186±13)、(210±30) pg/ml和(660±29)、(669±62) pg/ml;ANP大鼠两者分别为(337±56)、(443±60) pg/ml和(124±12)、(202±38)     

肺泡巨噬细胞活化在急性坏死性胰腺炎大鼠肺损伤中的作用

目的　探讨肺泡巨噬细胞活化在急性坏死性胰腺炎 (ANP)肺损伤中的作用。　方法30只成年SD大鼠随机分为正常对照组、ANP后 1、3、6、12h组 ,每组 6只。逆行性胰胆管注射 3%牛磺酸钠建立ANP大鼠模型 ,正常对照组大鼠自胆胰管内逆行注入生理盐水。经支气管肺泡灌洗获取肺泡巨噬细胞 ,检测支气管肺泡灌洗液中蛋白含量、肺组织髓过氧化物酶 (MPO)水平、肺泡巨噬细胞分泌肿瘤坏死因子α(TNFα)及一氧化氮 (NO)水平。以反转录聚合酶链反应 (RT PCR)法测定肺泡巨噬细胞TNFαmRNA、诱导型一氧化氮合酶 (iNOS)mRNA表达情况。行肺、胰腺组织病理学检查并评分。结果　ANP大鼠肺损伤随着病情进展而逐渐加重 ;肺组织MPO及支气管肺泡灌洗液中蛋白含量逐渐升高 ,12h达最高值 ,分别为 (10 78± 0 5 8)U/g和 (2 0 11 0± 10 5 5 ) μg/ml;肺泡巨噬细胞分泌TNFα、NO水平逐渐升高 ,至 6h达到高峰 ,分别为 (16 2 4 2± 149 2 )pg/ml和 (88 8± 6 5 ) μmol/L ,12h又回落。ANP发生后 ,肺泡巨噬细胞TNFαmRNA、iNOSmRNA的表达情况与TNFα、NO的变化趋势相似。ANP大鼠各组指标与正常对照组相比差异均有显著性意义 (P <0 0 5 )。组织学评分结果表明 ,随着胰腺损伤的加重肺损伤也逐渐加重。肺泡巨噬细胞TNFαmRNA、iNOSmRNA     

选择性消化道灭菌对急性胰腺炎肠源性内毒素血症的预防作用

目的探讨选择性消化道灭菌(SDD)对肠源性内毒素血症的预防作用.方法 Wistar大鼠60只,胰管逆行灌注法复制急性坏死性胰腺炎(ANP)模型,设立正常对照组、假手术组、ANP组和SDD治疗组(ANP后喂服三联抗生素),记录发病72小时组织学、血清TNFα、IL-1β、肠道菌群、血浆D-乳酸(肠通透性指标)和内毒素含量及病死率. 结果 SDD使ANP胰腺和小肠病理改变减轻,TNFα水平下降(P<0.01).ANP时肠道大肠杆菌等条件致病菌过度繁殖,双歧杆菌数量减少,SDD抑制了致病菌的繁殖,双歧杆菌数量不变,双歧杆菌/大肠杆菌比值(B/E值)回升(P<0.01).SDD组血浆D-乳酸由(8.05±3.05) mg/L降至(3.95±1.83) mg/L(P<0.01),门静脉内毒素由(0.423±0.155) EU/ml下降至(0.227±0.084) EU/ml(P<0.01).ANP组72小时病死率为58.8%,SDD组为14.3%(P=0.005).结论 SDD可减少肠道革兰氏阴性菌含量,保护正常菌群,维护肠屏障,减轻了ANP时肠源性内毒素血症,有助于提高ANP的生存率.     

急性胰腺炎胰腺微循环血小板内皮细胞粘附分子-1的表达

目的　探讨急性胰腺炎 (AP)胰腺微循环中血小板内皮细胞粘附分子 1 (PECAM 1 )表达的变化规律。方法　Wistar大鼠 48只 ,诱发AP动物模型 ,用流式细胞仪分析脾静脉血中白细胞PECAM 1的表达。结果　与正常组相比 ,各实验组多形核白细胞 (PMN)PECAM 1的表达下调 ,在急性坏死性胰腺炎 (ANP)组差异有显著性 ,ANP 2h组 [(63 .0± 1 9.2 ) % ,P <0 .0 5] ,ANP 4、6h组[(38.1± 2 1 .2 ) %、(32 .9± 1 4 .5) % ,P <0 .0 0 1 ] ;淋巴细胞PECAM 1的表达轻度下调 ,差异无显著性(P >0 .0 5)。结论　胰腺微循环中PMNPECAM 1表达的下调说明PMN的激活 ,可促进PMN外渗 ;抑制PMNPECAM 1的过度表达可能是治疗AP和 /或阻断AP向坏死型转化的一种潜在途径     

中药胰必清对急性坏死性胰腺炎兔肠道细菌移位的影响

目的探讨中药胰必清对急性坏死性胰腺炎(ANP)兔肠道细菌移位的影响。方法逆行胰管注射5％的牛磺胆酸钠溶液制作ANP模型。45只日本大耳兔随机分为假手术组(A组,15只)、ANP组(B组,15只)、ANP加中药治疗组(C组,15只)。观察各组血浆内毒素、胃动素(MTL)水平的改变,术后24 h血肿瘤坏死因子(TNF)-a水平,以及胰腺、肺、肠系膜淋巴结细菌培养情况。结果术后第3天和第7天,C组和B组血浆内毒素水平为(112±14)Eu·ml-1比(321±14)Eu·ml-1(P<0.01),(105±9)Eu·ml-1比(178±32)Eu·ml-1(P<0.05);术后24 h血清TNF-a水平:B组为(2.83±0.31)μg·L-1,明显高于C组(1.87±0.22)μg·L-1(P<0.05)。C组肠系膜淋巴结细菌培养阳性率明显低于B组(4/14比9/9,P<0.01),胰腺、肺组织的细菌培养阳性率亦低于B组(3/14比8/9,2/14比7/9,P<0.05);B组血浆MTL水平较术前明显降低(P<0.05),而C组则较术前明显升高(P<0.05),术后1、3、7 d,C组MTL水平均明显高于B组(P<0.05)。结论ANP时存在着胃肠运动障碍,中药胰必清可促进胃肠运动和肠内容物的排出,保护肠粘膜屏障,从而减少肠道细菌移位。     

牛磺胆酸钠诱导的急性坏死性胰腺炎大鼠脏器功能障碍观察

目的 探讨急性坏死性胰腺炎大鼠脏器功能障碍及病程演进规律.方法 大鼠分为两组,急性坏死性胰腺炎(acute necrosis pancreatitis,ANP)组64只,对照组48只.采用经胰管逆行注射5%牛磺胆酸钠诱导ANP,对照组予胰管内注射生理盐水.分别于模型诱导后3、6、9、12、18、24 h(每一时间点各8只大鼠)处死,测定大鼠呼吸、体温、心率、血白细胞、肝肾功能及血气分析,另有16只ANP大鼠观察其24 h生存率.结果 ANP组24 h生存率为75%.ANP组在模型制备后3 h体温、心率、血白细胞明显高于对照组(P<0.05),6 h血清乳酸脱氢酶水平显著升高(2 613 vs 1822 IU/L.P<0.05),9 h血清肌酐水平显著升高(27.5vs 18.7 μmol/L,P<0.05),12 h动脉血PaO2显著降低(7.8vs 12.5 kPa,P<0.05),18 h之后各脏器处于衰竭期.对照组无脏器功能障碍表现.ANP组各时间点胰腺病理学评分显著高于对照组.结论 在5%牛磺胆酸钠诱导的ANP病程中,3 h后出现全身炎症反应综合征,6 h出现肝功能障碍,9 h后进入多脏器功能障碍期,18 h后进入多脏器衰竭期.     

水通道蛋白1在急性坏死性胰腺炎大鼠胰腺组织的表达及其意义

Objective To study the expression of aquaporin 1 ( AQP1 ) in pancreas and its pathogenic role in rats with experimental acute necrotizing pancreatitis (ANP). Methods Forty-eight male Sprague-Dawley rats were randomly divided into two groups : control group ( n = 24 ) and ANP group ( n = 24). Six rats in each group were sacrificed at 3,6,12 and 18 h after induction of experimental models. Quantity of ascites and levels of serum amylases were measured at each time point. Serum AQPI was determined by ELISA. Pathological changes of pancreatic tissues were examined. Capillary permeability in pancreatic tissues was tested by Evans Blue (EB) extravasation method. AQPI expression in pancreatic tissues was detected by immunohistochemieal staining, Western blot and fluorescence quantitative polymerase chain reaction (FQ-PCR). Results (1) Serum amylase level at 3,6,12, and 18 h in control group was (1308±759) ,(1077±508), (1325±761),(1328±762) U/L,and that in ANP group was (9102± 2199), (8799±1634), (9398±1473), (9484±862) U/L respectively. The concentration of EB in pancreatic tissues at each time point in control group was (205.61±32.99), (141.46±27.18 ), (96.94± 26.79), (61.43±24.82) mg/L, and that in ANP group was ( 273.59±23.47 ), ( 253.51±31.68 ), (221.15±73.68 ), (185.28±42.35) ,respectively. There was significandy difference between two groups. Serum AQP1 level in control group at each point was ( 74.08±11.80), (78.49±9.06 ), (75.77± 7.37 ), ( 72.75±13.87 ) mg/L, and that in AN P group was (73.29±9.61 ), ( 62.85±7.28 ), (62.07± 4.39 ), (46.33±11.91 ) mg/L, respectively ( P < 0.01 ). ( 2 ) Protein expression of AQPI in pancreatic tissues detected by immunohistochemical staining in control group at each time point was 114.13±7.92, 122.39±7.99,145.98±6.48,113.98±6.48, and that in ANP group was 80.07±14.89,110.54± 4.45,103.77±10.48,99.18±6.95;Protein expression of AQP1 in pancreatic tissues detected by Western blot in control group at each time point was 1.19±0.33,1.02±0.25,0.90±0.33,1.06±0.20,and that in ANP group was 0.83±0.11,0.96±0.21,0. 58±0.28,0.72±0.14, respectively ( P < 0.05 ). ( 3 ) The mRNA level of AQP1 gene expressed in pancreas in control group at each time point was 0.91±0.22,1.01±0.83,0.48±0.23,0.61±0.51,and that in ANP group was 2.13±0.63,2.02±1.40, 2.07±0.86,2.49±2.47,respectively (P<0.01).Condusion The expression of AQP1 wasdown-reg-ulated in pancreas in rats with ANP,which might could play an important role in the pathogenesis of capil-lary leak syndrome.     

水通道蛋白1在急性坏死性胰腺炎大鼠胰腺组织的表达及其意义

Objective To study the expression of aquaporin 1 ( AQP1 ) in pancreas and its pathogenic role in rats with experimental acute necrotizing pancreatitis (ANP). Methods Forty-eight male Sprague-Dawley rats were randomly divided into two groups : control group ( n = 24 ) and ANP group ( n = 24). Six rats in each group were sacrificed at 3,6,12 and 18 h after induction of experimental models. Quantity of ascites and levels of serum amylases were measured at each time point. Serum AQPI was determined by ELISA. Pathological changes of pancreatic tissues were examined. Capillary permeability in pancreatic tissues was tested by Evans Blue (EB) extravasation method. AQPI expression in pancreatic tissues was detected by immunohistochemieal staining, Western blot and fluorescence quantitative polymerase chain reaction (FQ-PCR). Results (1) Serum amylase level at 3,6,12, and 18 h in control group was (1308±759) ,(1077±508), (1325±761),(1328±762) U/L,and that in ANP group was (9102± 2199), (8799±1634), (9398±1473), (9484±862) U/L respectively. The concentration of EB in pancreatic tissues at each time point in control group was (205.61±32.99), (141.46±27.18 ), (96.94± 26.79), (61.43±24.82) mg/L, and that in ANP group was ( 273.59±23.47 ), ( 253.51±31.68 ), (221.15±73.68 ), (185.28±42.35) ,respectively. There was significandy difference between two groups. Serum AQP1 level in control group at each point was ( 74.08±11.80), (78.49±9.06 ), (75.77± 7.37 ), ( 72.75±13.87 ) mg/L, and that in AN P group was (73.29±9.61 ), ( 62.85±7.28 ), (62.07± 4.39 ), (46.33±11.91 ) mg/L, respectively ( P < 0.01 ). ( 2 ) Protein expression of AQPI in pancreatic tissues detected by immunohistochemical staining in control group at each time point was 114.13±7.92, 122.39±7.99,145.98±6.48,113.98±6.48, and that in ANP group was 80.07±14.89,110.54± 4.45,103.77±10.48,99.18±6.95;Protein expression of AQP1 in pancreatic tissues detected by Western blot in control group at each time point was 1.19±0.33,1.02±0.25,0.90±0.33,1.06±0.20,and that in ANP group was 0.83±0.11,0.96±0.21,0. 58±0.28,0.72±0.14, respectively ( P < 0.05 ). ( 3 ) The mRNA level of AQP1 gene expressed in pancreas in control group at each time point was 0.91±0.22,1.01±0.83,0.48±0.23,0.61±0.51,and that in ANP group was 2.13±0.63,2.02±1.40, 2.07±0.86,2.49±2.47,respectively (P<0.01).Condusion The expression of AQP1 wasdown-reg-ulated in pancreas in rats with ANP,which might could play an important role in the pathogenesis of capil-lary leak syndrome.     

水通道蛋白1在急性坏死性胰腺炎大鼠胰腺组织的表达及其意义

Objective To study the expression of aquaporin 1 ( AQP1 ) in pancreas and its pathogenic role in rats with experimental acute necrotizing pancreatitis (ANP). Methods Forty-eight male Sprague-Dawley rats were randomly divided into two groups : control group ( n = 24 ) and ANP group ( n = 24). Six rats in each group were sacrificed at 3,6,12 and 18 h after induction of experimental models. Quantity of ascites and levels of serum amylases were measured at each time point. Serum AQPI was determined by ELISA. Pathological changes of pancreatic tissues were examined. Capillary permeability in pancreatic tissues was tested by Evans Blue (EB) extravasation method. AQPI expression in pancreatic tissues was detected by immunohistochemieal staining, Western blot and fluorescence quantitative polymerase chain reaction (FQ-PCR). Results (1) Serum amylase level at 3,6,12, and 18 h in control group was (1308±759) ,(1077±508), (1325±761),(1328±762) U/L,and that in ANP group was (9102± 2199), (8799±1634), (9398±1473), (9484±862) U/L respectively. The concentration of EB in pancreatic tissues at each time point in control group was (205.61±32.99), (141.46±27.18 ), (96.94± 26.79), (61.43±24.82) mg/L, and that in ANP group was ( 273.59±23.47 ), ( 253.51±31.68 ), (221.15±73.68 ), (185.28±42.35) ,respectively. There was significandy difference between two groups. Serum AQP1 level in control group at each point was ( 74.08±11.80), (78.49±9.06 ), (75.77± 7.37 ), ( 72.75±13.87 ) mg/L, and that in AN P group was (73.29±9.61 ), ( 62.85±7.28 ), (62.07± 4.39 ), (46.33±11.91 ) mg/L, respectively ( P < 0.01 ). ( 2 ) Protein expression of AQPI in pancreatic tissues detected by immunohistochemical staining in control group at each time point was 114.13±7.92, 122.39±7.99,145.98±6.48,113.98±6.48, and that in ANP group was 80.07±14.89,110.54± 4.45,103.77±10.48,99.18±6.95;Protein expression of AQP1 in pancreatic tissues detected by Western blot in control group at each time point was 1.19±0.33,1.02±0.25,0.90±0.33,1.06±0.20,and that in ANP group was 0.83±0.11,0.96±0.21,0. 58±0.28,0.72±0.14, respectively ( P < 0.05 ). ( 3 ) The mRNA level of AQP1 gene expressed in pancreas in control group at each time point was 0.91±0.22,1.01±0.83,0.48±0.23,0.61±0.51,and that in ANP group was 2.13±0.63,2.02±1.40, 2.07±0.86,2.49±2.47,respectively (P<0.01).Condusion The expression of AQP1 wasdown-reg-ulated in pancreas in rats with ANP,which might could play an important role in the pathogenesis of capil-lary leak syndrome.     

水通道蛋白1在急性坏死性胰腺炎大鼠胰腺组织的表达及其意义

Objective To study the expression of aquaporin 1 ( AQP1 ) in pancreas and its pathogenic role in rats with experimental acute necrotizing pancreatitis (ANP). Methods Forty-eight male Sprague-Dawley rats were randomly divided into two groups : control group ( n = 24 ) and ANP group ( n = 24). Six rats in each group were sacrificed at 3,6,12 and 18 h after induction of experimental models. Quantity of ascites and levels of serum amylases were measured at each time point. Serum AQPI was determined by ELISA. Pathological changes of pancreatic tissues were examined. Capillary permeability in pancreatic tissues was tested by Evans Blue (EB) extravasation method. AQPI expression in pancreatic tissues was detected by immunohistochemieal staining, Western blot and fluorescence quantitative polymerase chain reaction (FQ-PCR). Results (1) Serum amylase level at 3,6,12, and 18 h in control group was (1308±759) ,(1077±508), (1325±761),(1328±762) U/L,and that in ANP group was (9102± 2199), (8799±1634), (9398±1473), (9484±862) U/L respectively. The concentration of EB in pancreatic tissues at each time point in control group was (205.61±32.99), (141.46±27.18 ), (96.94± 26.79), (61.43±24.82) mg/L, and that in ANP group was ( 273.59±23.47 ), ( 253.51±31.68 ), (221.15±73.68 ), (185.28±42.35) ,respectively. There was significandy difference between two groups. Serum AQP1 level in control group at each point was ( 74.08±11.80), (78.49±9.06 ), (75.77± 7.37 ), ( 72.75±13.87 ) mg/L, and that in AN P group was (73.29±9.61 ), ( 62.85±7.28 ), (62.07± 4.39 ), (46.33±11.91 ) mg/L, respectively ( P < 0.01 ). ( 2 ) Protein expression of AQPI in pancreatic tissues detected by immunohistochemical staining in control group at each time point was 114.13±7.92, 122.39±7.99,145.98±6.48,113.98±6.48, and that in ANP group was 80.07±14.89,110.54± 4.45,103.77±10.48,99.18±6.95;Protein expression of AQP1 in pancreatic tissues detected by Western blot in control group at each time point was 1.19±0.33,1.02±0.25,0.90±0.33,1.06±0.20,and that in ANP group was 0.83±0.11,0.96±0.21,0. 58±0.28,0.72±0.14, respectively ( P < 0.05 ). ( 3 ) The mRNA level of AQP1 gene expressed in pancreas in control group at each time point was 0.91±0.22,1.01±0.83,0.48±0.23,0.61±0.51,and that in ANP group was 2.13±0.63,2.02±1.40, 2.07±0.86,2.49±2.47,respectively (P<0.01).Condusion The expression of AQP1 wasdown-reg-ulated in pancreas in rats with ANP,which might could play an important role in the pathogenesis of capil-lary leak syndrome.     

水通道蛋白1在急性坏死性胰腺炎大鼠胰腺组织的表达及其意义

Objective To study the expression of aquaporin 1 ( AQP1 ) in pancreas and its pathogenic role in rats with experimental acute necrotizing pancreatitis (ANP). Methods Forty-eight male Sprague-Dawley rats were randomly divided into two groups : control group ( n = 24 ) and ANP group ( n = 24). Six rats in each group were sacrificed at 3,6,12 and 18 h after induction of experimental models. Quantity of ascites and levels of serum amylases were measured at each time point. Serum AQPI was determined by ELISA. Pathological changes of pancreatic tissues were examined. Capillary permeability in pancreatic tissues was tested by Evans Blue (EB) extravasation method. AQPI expression in pancreatic tissues was detected by immunohistochemieal staining, Western blot and fluorescence quantitative polymerase chain reaction (FQ-PCR). Results (1) Serum amylase level at 3,6,12, and 18 h in control group was (1308±759) ,(1077±508), (1325±761),(1328±762) U/L,and that in ANP group was (9102± 2199), (8799±1634), (9398±1473), (9484±862) U/L respectively. The concentration of EB in pancreatic tissues at each time point in control group was (205.61±32.99), (141.46±27.18 ), (96.94± 26.79), (61.43±24.82) mg/L, and that in ANP group was ( 273.59±23.47 ), ( 253.51±31.68 ), (221.15±73.68 ), (185.28±42.35) ,respectively. There was significandy difference between two groups. Serum AQP1 level in control group at each point was ( 74.08±11.80), (78.49±9.06 ), (75.77± 7.37 ), ( 72.75±13.87 ) mg/L, and that in AN P group was (73.29±9.61 ), ( 62.85±7.28 ), (62.07± 4.39 ), (46.33±11.91 ) mg/L, respectively ( P < 0.01 ). ( 2 ) Protein expression of AQPI in pancreatic tissues detected by immunohistochemical staining in control group at each time point was 114.13±7.92, 122.39±7.99,145.98±6.48,113.98±6.48, and that in ANP group was 80.07±14.89,110.54± 4.45,103.77±10.48,99.18±6.95;Protein expression of AQP1 in pancreatic tissues detected by Western blot in control group at each time point was 1.19±0.33,1.02±0.25,0.90±0.33,1.06±0.20,and that in ANP group was 0.83±0.11,0.96±0.21,0. 58±0.28,0.72±0.14, respectively ( P < 0.05 ). ( 3 ) The mRNA level of AQP1 gene expressed in pancreas in control group at each time point was 0.91±0.22,1.01±0.83,0.48±0.23,0.61±0.51,and that in ANP group was 2.13±0.63,2.02±1.40, 2.07±0.86,2.49±2.47,respectively (P<0.01).Condusion The expression of AQP1 wasdown-reg-ulated in pancreas in rats with ANP,which might could play an important role in the pathogenesis of capil-lary leak syndrome.     

水通道蛋白1在急性坏死性胰腺炎大鼠胰腺组织的表达及其意义

Objective To study the expression of aquaporin 1 ( AQP1 ) in pancreas and its pathogenic role in rats with experimental acute necrotizing pancreatitis (ANP). Methods Forty-eight male Sprague-Dawley rats were randomly divided into two groups : control group ( n = 24 ) and ANP group ( n = 24). Six rats in each group were sacrificed at 3,6,12 and 18 h after induction of experimental models. Quantity of ascites and levels of serum amylases were measured at each time point. Serum AQPI was determined by ELISA. Pathological changes of pancreatic tissues were examined. Capillary permeability in pancreatic tissues was tested by Evans Blue (EB) extravasation method. AQPI expression in pancreatic tissues was detected by immunohistochemieal staining, Western blot and fluorescence quantitative polymerase chain reaction (FQ-PCR). Results (1) Serum amylase level at 3,6,12, and 18 h in control group was (1308±759) ,(1077±508), (1325±761),(1328±762) U/L,and that in ANP group was (9102± 2199), (8799±1634), (9398±1473), (9484±862) U/L respectively. The concentration of EB in pancreatic tissues at each time point in control group was (205.61±32.99), (141.46±27.18 ), (96.94± 26.79), (61.43±24.82) mg/L, and that in ANP group was ( 273.59±23.47 ), ( 253.51±31.68 ), (221.15±73.68 ), (185.28±42.35) ,respectively. There was significandy difference between two groups. Serum AQP1 level in control group at each point was ( 74.08±11.80), (78.49±9.06 ), (75.77± 7.37 ), ( 72.75±13.87 ) mg/L, and that in AN P group was (73.29±9.61 ), ( 62.85±7.28 ), (62.07± 4.39 ), (46.33±11.91 ) mg/L, respectively ( P < 0.01 ). ( 2 ) Protein expression of AQPI in pancreatic tissues detected by immunohistochemical staining in control group at each time point was 114.13±7.92, 122.39±7.99,145.98±6.48,113.98±6.48, and that in ANP group was 80.07±14.89,110.54± 4.45,103.77±10.48,99.18±6.95;Protein expression of AQP1 in pancreatic tissues detected by Western blot in control group at each time point was 1.19±0.33,1.02±0.25,0.90±0.33,1.06±0.20,and that in ANP group was 0.83±0.11,0.96±0.21,0. 58±0.28,0.72±0.14, respectively ( P < 0.05 ). ( 3 ) The mRNA level of AQP1 gene expressed in pancreas in control group at each time point was 0.91±0.22,1.01±0.83,0.48±0.23,0.61±0.51,and that in ANP group was 2.13±0.63,2.02±1.40, 2.07±0.86,2.49±2.47,respectively (P<0.01).Condusion The expression of AQP1 wasdown-reg-ulated in pancreas in rats with ANP,which might could play an important role in the pathogenesis of capil-lary leak syndrome.