薛育政 劉宗良 俞憲民 陸宇峰 戴泓 尹群 李建平
·論著·
5-HT、iFABP在重癥急性胰腺炎腸功能障礙患者中的水平及臨床價值
薛育政 劉宗良 俞憲民 陸宇峰 戴泓 尹群 李建平
目的檢測重癥急性胰腺炎(SAP)伴腸功能障礙患者血5-羥色胺(5-HT)及尿液中腸脂肪酸結合蛋白(iFABP )水平,探討其臨床應用價值。方法ELASA法檢測42例SAP伴腸功能障礙患者入院第1天、第3天及第7天血5-HT及尿iFABP的水平,同時記錄腸鳴音次數(shù);以20例健康體檢人員作為對照組。結果健康對照組平均腸鳴音次數(shù)為(5.6±2.3)次/min。SAP組入院第1天、第3天及第7天腸鳴音次數(shù)分別為(2.3±0.7)次/min、(1.7±0.2)次/min與(3.1±1.1)次/min,均較健康對照組顯著減少(P值均lt;0.01)。對照組血5-HT含量為(86.7±9.5)ng/ml,SAP組第1天、第3天、第7天含量分別為(112.0±17.8)ng/ml、(130.5±19.7)ng/ml、(107.9±16.3)ng/ml;對照組尿iFABP 含量為(90.5±19.8)pg/ml,SAP組分別為(1250.2±425.3)pg/ml、(1586.9±523.4)pg/ml、(1154.6±394.0)pg/ml。SAP組的血5-HT和尿iFABP含量均較對照組顯著增加(P值均lt;0.01);SAP組第3天的含量又較第1天及第7天顯著增高,而第1天與第7天之間無顯著差異。結論在SAP早期檢測血5-HT及尿iFABP可有效評估患者的腸功能狀況,有潛在的臨床應用價值。
胰腺炎,急性壞死性; 5-羥色胺; 脂肪酸結合蛋白質類; 腸功能障礙
血清5-羥色胺(5-hydroxytryptamine, 5-HT)及尿腸脂肪酸結合蛋白(intestinal fatty acid binding protein, iFABP)在臨床上多用于胃腸動力及腸缺血的評估。由于重癥急性胰腺炎(severe acute pancreatitis, SAP)多伴發(fā)腸功能障礙,而一旦發(fā)生腸功能障礙,極易導致腸腔內條件致病菌迅速繁殖,產生大量細菌毒素,又因腸黏膜通透性增高,細菌毒素易位,從而對胰腺造成二次打擊,加重病情發(fā)展[1-2]。為此,本試驗檢測SAP伴腸功能障礙患者的血5-HT及尿iFABP水平,探討其臨床應用價值。
一、一般資料
選取2007年1月至2009年1月間我院收治的SAP伴腸功能障礙患者42例,診斷參照Frossard等[1]的標準。其中男30例,女12例,年齡24~72歲,平均49歲;膽源性26例,高脂血癥性11例,暴飲暴食3例,特發(fā)性2例;APACHEⅡ評分為8.9±0.9?;颊呷朐汉蠹从栉改c減壓、抑酸、抑制胰酶活性及減少胰酶分泌等治療,有明顯感染者則給予抗生素。同時選擇我院健康體健人員20例作為對照組。
二、血5-HT及尿iFABP測定
取患者入院第1天、第3天及第7天晨起空腹靜脈血3 ml,迅速分離血清,置-70℃低溫冰箱保存;同時留晨尿5 ml,置-20℃冰箱保存。采用酶聯(lián)免疫吸附試驗法檢測血5-HT及尿iFABP含量,試劑盒均由上海拜力生物科技有限公司提供,操作按說明書進行。
三、腸鳴音記錄
于入院第1天、第3天及第7天動態(tài)監(jiān)測腸鳴音。將腹部分為4個象限,平均每個象限聽診5 min,計算平均每分鐘腸鳴音次數(shù)。
四、統(tǒng)計學方法
一、平均腸鳴音次數(shù)的變化
健康對照組平均腸鳴音次數(shù)為(5.6±2.3)次/min。SAP組于入院第1天、第3天及第7天腸鳴音次數(shù)分別為(2.3±0.7)次/min、(1.7±0.2)次/min與(3.1±1.1)次/min,均較健康對照組顯著減少(P值均lt;0.01);入院第3天腸鳴音次數(shù)最少,至第7天,腸鳴音次數(shù)趨于正常。
二、血5-HT及尿iFABP含量變化
對照組血5-HT含量為(86.7±9.5)ng/ml,SAP組第1天、第3天、第7天含量分別為(112.0±17.8) ng/ml、(130.5±19.7)ng/ml、(107.9±16.3)ng/ml;對照組尿iFABP 含量為(90.5±19.8)pg/ml,SAP組分別為(1250.2±425.3)pg/ml、(1586.9±523.4)pg/ml、(1154.6±394.0)pg/ml。SAP組的含量均較對照組顯著增加(Plt;0.01);SAP組第3天的含量又較第1天及第7天顯著增高,而第1天與第7天之間無顯著差異。
SAP伴腸功能衰竭患者在入院第1天、第3天血5-HT與尿iFABP濃度呈顯著性正相關(r值分別為0.41、0.32,Plt;0.01或0.05),至入院第7天兩者無相關性(r=0.19,Pgt;0.05)。
SAP時由于腸功能障礙及腸黏膜通透性增高,細菌毒素易發(fā)生易位,造成二次感染及內毒素血癥,加重對胰腺損傷,誘發(fā)多器官功能障礙(MODS),最終導致患者病死。及時診斷急性胰腺炎有無伴發(fā)腸功能障礙對控制病情進展、提高SAP搶救成功率具有重要臨床意義。目前臨床多通過觀察有無腸鳴音或其強弱來評估腸功能狀況,缺乏客觀及靈敏的評估指標。
5-HT,又名血清素(serotonin),約90%由腸嗜鉻細胞合成。5-HT作為自體活性物質,對胃腸道蠕動及嘔吐反射具有重要調節(jié)作用。生理狀態(tài)下,5-HT主要通過激動胃腸道平滑肌的相應受體,使胃腸道張力增加,腸蠕動加快[3-4]。
iFABP是一種分子質量為15 000的小分子蛋白,主要存在于小腸絨毛上皮細胞中,對脂肪酸的轉運及貯存具有重要作用,目前主要用于評估腸黏膜缺血再灌注損傷[5-6]。健康人群尿液及血液中iFABP濃度極低。急性胰腺炎,尤其SAP時,因血小板聚焦及腸黏膜血管收縮,致腸黏膜上皮細胞缺血缺氧,導致其通透性增高[7-8],從而使iFABP從胞質中漏出,由血液而進入尿液中。
本研究結果顯示,SAP患者入院第1天,腸功能發(fā)生障礙,腸鳴音次數(shù)顯著減少,于第3天最少,至第7天時趨于正常。同時患者血5-HT及尿iFABP水平在入院第1天顯著升高,于第3天達到頂峰,第7天時又恢復至入院時水平。相關性分析結果顯示入院第1、3天SAP伴腸功能障礙患者血清5-HT與尿液iFABP濃度呈正性相關,至第7天時相關性則不明顯。表明在SAP早期檢測血5-HT及尿iFABP可有效評估患者的腸功能狀況,這一結果有潛在的臨床應用價值。
[1] Frossard JL,Steer ML,Pastor CM.Acute pancreatitis.Lancet,2008,371:143-152.
[2] Cappell MS.Acute pancreatitis:etiology,clinical presentation,diagnosis and therapy.Med Clin North Am,2008,92:889-923.
[3] Gershon MD.5-HT(serotonin) physiology and related drugs.Curr Opin Gastroenterol,2000,16:113-120.
[4] Wade PR,Tamir H,Kirchgessner AL,et al.Analysis of the role of 5-HT in the enteric nervous system using anti-idiotopic antibodies to 5-HT receptors.Am J Physiol,1994,266:G403-G416.
[5] Rahman SH,Ammori BJ,Holmfield J,et al.Intestinal hypoperfusion contributes to gut barrier failure in severe acute pancreatitis.J Gastrointest Surg,2003,7:26-35.
[6] Kinnala PJ,Kuttila KT,Gr?nroos JM,et al.Splanchnic and pancreatic tissue perfusion in experimental acute pancreatitis.Scand J Gastroenterol,2002,37:845-849.
[7] Connor JD,Rasheed H,Gilani AH,et al.Second messengers in platelet aggregation evoked by serotonin and A23187,a calcium ionophore.Life Sci,2001,69:2759-2764.
[8] De Clerck F,Somers Y,Mannaert E,et al.In vitro effects of risperidone and 9-hydroxy-risperidone on human platelet function,plasma coagulation,and fibrinolysis.Clin Ther,2004,26:1261-1273.
2010-01-20)
(本文編輯:屠振興)
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
無錫巿科委社會發(fā)展計劃(CSZ00831),無錫巿衛(wèi)生局中醫(yī)藥科研項目(ZZD0804)
214041 無錫,無錫巿第三人民醫(yī)院消化內科
李建平,Email:wxsylijp@163.com