5-HT、iFABP在重症急性胰腺炎肠功能障碍患者中的水平及临床价值
2010-11-24薛育政刘宗良俞宪民陆宇峰戴泓尹群李建平
薛育政 刘宗良 俞宪民 陆宇峰 戴泓 尹群 李建平
·论著·
5-HT、iFABP在重症急性胰腺炎肠功能障碍患者中的水平及临床价值
薛育政 刘宗良 俞宪民 陆宇峰 戴泓 尹群 李建平
目的检测重症急性胰腺炎(SAP)伴肠功能障碍患者血5-羟色胺(5-HT)及尿液中肠脂肪酸结合蛋白(iFABP )水平,探讨其临床应用价值。方法ELASA法检测42例SAP伴肠功能障碍患者入院第1天、第3天及第7天血5-HT及尿iFABP的水平,同时记录肠鸣音次数;以20例健康体检人员作为对照组。结果健康对照组平均肠鸣音次数为(5.6±2.3)次/min。SAP组入院第1天、第3天及第7天肠鸣音次数分别为(2.3±0.7)次/min、(1.7±0.2)次/min与(3.1±1.1)次/min,均较健康对照组显著减少(P值均lt;0.01)。对照组血5-HT含量为(86.7±9.5)ng/ml,SAP组第1天、第3天、第7天含量分别为(112.0±17.8)ng/ml、(130.5±19.7)ng/ml、(107.9±16.3)ng/ml;对照组尿iFABP 含量为(90.5±19.8)pg/ml,SAP组分别为(1250.2±425.3)pg/ml、(1586.9±523.4)pg/ml、(1154.6±394.0)pg/ml。SAP组的血5-HT和尿iFABP含量均较对照组显著增加(P值均lt;0.01);SAP组第3天的含量又较第1天及第7天显著增高,而第1天与第7天之间无显著差异。结论在SAP早期检测血5-HT及尿iFABP可有效评估患者的肠功能状况,有潜在的临床应用价值。
胰腺炎,急性坏死性; 5-羟色胺; 脂肪酸结合蛋白质类; 肠功能障碍
血清5-羟色胺(5-hydroxytryptamine, 5-HT)及尿肠脂肪酸结合蛋白(intestinal fatty acid binding protein, iFABP)在临床上多用于胃肠动力及肠缺血的评估。由于重症急性胰腺炎(severe acute pancreatitis, SAP)多伴发肠功能障碍,而一旦发生肠功能障碍,极易导致肠腔内条件致病菌迅速繁殖,产生大量细菌毒素,又因肠黏膜通透性增高,细菌毒素易位,从而对胰腺造成二次打击,加重病情发展[1-2]。为此,本试验检测SAP伴肠功能障碍患者的血5-HT及尿iFABP水平,探讨其临床应用价值。
材料与方法
一、一般资料
选取2007年1月至2009年1月间我院收治的SAP伴肠功能障碍患者42例,诊断参照Frossard等[1]的标准。其中男30例,女12例,年龄24~72岁,平均49岁;胆源性26例,高脂血症性11例,暴饮暴食3例,特发性2例;APACHEⅡ评分为8.9±0.9。患者入院后即予胃肠减压、抑酸、抑制胰酶活性及减少胰酶分泌等治疗,有明显感染者则给予抗生素。同时选择我院健康体健人员20例作为对照组。
二、血5-HT及尿iFABP测定
取患者入院第1天、第3天及第7天晨起空腹静脉血3 ml,迅速分离血清,置-70℃低温冰箱保存;同时留晨尿5 ml,置-20℃冰箱保存。采用酶联免疫吸附试验法检测血5-HT及尿iFABP含量,试剂盒均由上海拜力生物科技有限公司提供,操作按说明书进行。
三、肠鸣音记录
于入院第1天、第3天及第7天动态监测肠鸣音。将腹部分为4个象限,平均每个象限听诊5 min,计算平均每分钟肠鸣音次数。
四、统计学方法
结 果
一、平均肠鸣音次数的变化
健康对照组平均肠鸣音次数为(5.6±2.3)次/min。SAP组于入院第1天、第3天及第7天肠鸣音次数分别为(2.3±0.7)次/min、(1.7±0.2)次/min与(3.1±1.1)次/min,均较健康对照组显著减少(P值均lt;0.01);入院第3天肠鸣音次数最少,至第7天,肠鸣音次数趋于正常。
二、血5-HT及尿iFABP含量变化
对照组血5-HT含量为(86.7±9.5)ng/ml,SAP组第1天、第3天、第7天含量分别为(112.0±17.8) ng/ml、(130.5±19.7)ng/ml、(107.9±16.3)ng/ml;对照组尿iFABP 含量为(90.5±19.8)pg/ml,SAP组分别为(1250.2±425.3)pg/ml、(1586.9±523.4)pg/ml、(1154.6±394.0)pg/ml。SAP组的含量均较对照组显著增加(Plt;0.01);SAP组第3天的含量又较第1天及第7天显著增高,而第1天与第7天之间无显著差异。
SAP伴肠功能衰竭患者在入院第1天、第3天血5-HT与尿iFABP浓度呈显著性正相关(r值分别为0.41、0.32,Plt;0.01或0.05),至入院第7天两者无相关性(r=0.19,Pgt;0.05)。
讨 论
SAP时由于肠功能障碍及肠黏膜通透性增高,细菌毒素易发生易位,造成二次感染及内毒素血症,加重对胰腺损伤,诱发多器官功能障碍(MODS),最终导致患者病死。及时诊断急性胰腺炎有无伴发肠功能障碍对控制病情进展、提高SAP抢救成功率具有重要临床意义。目前临床多通过观察有无肠鸣音或其强弱来评估肠功能状况,缺乏客观及灵敏的评估指标。
5-HT,又名血清素(serotonin),约90%由肠嗜铬细胞合成。5-HT作为自体活性物质,对胃肠道蠕动及呕吐反射具有重要调节作用。生理状态下,5-HT主要通过激动胃肠道平滑肌的相应受体,使胃肠道张力增加,肠蠕动加快[3-4]。
iFABP是一种分子质量为15 000的小分子蛋白,主要存在于小肠绒毛上皮细胞中,对脂肪酸的转运及贮存具有重要作用,目前主要用于评估肠黏膜缺血再灌注损伤[5-6]。健康人群尿液及血液中iFABP浓度极低。急性胰腺炎,尤其SAP时,因血小板聚焦及肠黏膜血管收缩,致肠黏膜上皮细胞缺血缺氧,导致其通透性增高[7-8],从而使iFABP从胞质中漏出,由血液而进入尿液中。
本研究结果显示,SAP患者入院第1天,肠功能发生障碍,肠鸣音次数显著减少,于第3天最少,至第7天时趋于正常。同时患者血5-HT及尿iFABP水平在入院第1天显著升高,于第3天达到顶峰,第7天时又恢复至入院时水平。相关性分析结果显示入院第1、3天SAP伴肠功能障碍患者血清5-HT与尿液iFABP浓度呈正性相关,至第7天时相关性则不明显。表明在SAP早期检测血5-HT及尿iFABP可有效评估患者的肠功能状况,这一结果有潜在的临床应用价值。
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2010-01-20)
(本文编辑:屠振兴)
Levelandclinicalsignificanceof5-HTandiFABPinsevereacutepancreatitispatientswithintestinaldysfunction
XUEYu-zheng,LIUZong-liang,YUXian-min,LUYu-feng,DAIHong,YINQun,LIJian-ping.
DepartmentofGastroenterology,ThirdHospitalofWuxi,Wuxi214041,China
LIJian-ping,Email:wxsylijp@163.com
ObjectivesTo determine the level and clinical significance of 5-hydroxytryptamine (5-HT) and intestinal fatty acid binding protein (iFABP) in patients of severe acute pancreatitis (SAP) with intestinal dysfunction.MethodsThe serum and urine in 42 cases of SAP with intestinal dysfunction were collected at day 1, 3 and 7 after admission, respectively. The numbers of bowel sounds were recorded. 20 health subjects were selected as the control.ResultsThe numbers of bowel sounds in health subjects were 5.6±2.3 /min. The numbers of bowel sounds in SAP patients at day 1, 3 and 7 were 2.3±0.7 /min, 1.7±0.2 /min and 3.1±1.1 /min, respectively; which were significantly lower than that in the control group (Plt;0.01). The level of 5-HT in the control group was(86.7±9.5)ng/ml,while the levels of 5-HT in the SAP patients at day 1, 3 and 7 were (112.0±17.8) ng/ml, (130.5±19.7) ng/ml, (107.9±16.3) ng/ml. The level of urine iFABP in the control group was (90.5±19.8)pg/ml, while the levels of urine iFABP in the SAP patients were (1250.2±425.3) pg/ml, (1586.9±523.4) pg/ml, (1154.6±394.0) pg/ml. The levels of 5-HT and urine iFABP in the SAP patients all were significantly higher than those in the control group (Plt;0.01). The levels of 5-HT and urine iFABP in the SAP patients at day 3 were significantly higher than those in the day 1 and day 7, while there was no significant difference between the two groups.ConclusionsDetermination of serum 5-HT and urine iFABP in patients with early SAP could effectively evaluate the intestinal function, and it may have potential clinical significance.
Pancreatitis,acute necrotizing; 5-hydroxytryptamine; Fatty acid-binding proteins; Intestinal dysfunction
10.3760/cma.j.issn.1674-1935.2010.02.004
无锡巿科委社会发展计划(CSZ00831),无锡巿卫生局中医药科研项目(ZZD0804)
214041 无锡,无锡巿第三人民医院消化内科
李建平,Email:wxsylijp@163.com