周少碧 梁華晟
·論著·
急性胰腺炎患者血清髓系細(xì)胞觸發(fā)受體-1水平及其臨床應(yīng)用價(jià)值
周少碧 梁華晟
目的分析急性胰腺炎患者早期血清髓系細(xì)胞觸發(fā)受體-1(TREM-1)水平及其與炎癥因子的關(guān)系,探討其預(yù)測(cè)急性胰腺炎預(yù)后的價(jià)值。方法ELISA法檢測(cè)19例早期急性胰腺炎患者血清TNF-α、IL-8、IL-1β及TREM-1水平,分析它們之間的關(guān)系,并與20例正常人比較。結(jié)果急性胰腺炎組TNF-α、IL-8、IL-1β及TREM-1水平分別為(52.26±12.98)pg/ml、(20.18±9.81)pg/ml、(35.57±13.34)pg/ml和(83.09±32.49) pg/ml,對(duì)照組分別為(18.69±6.42)pg/ml、(9.81±4.80)pg/ml、(14.94±5.16)pg/ml和(8.44±8.42) pg/ml,兩組比較有顯著差異(P值均lt;0.01)。急性胰腺炎患者TREM-1與各項(xiàng)炎癥因子均呈正相關(guān)(P值均lt;0.05)。TREM-1對(duì)于急性胰腺炎患者預(yù)后判斷的敏感性為77.8%,特異性為70.0%,優(yōu)于TNF-α、IL-8、IL-1β。結(jié)論TREM-1可以影響急性胰腺炎患者血清炎癥因子水平,對(duì)急性胰腺炎預(yù)后判斷有一定價(jià)值。
胰腺炎; 髓系細(xì)胞; 炎癥趨化因子類
髓系細(xì)胞觸發(fā)受體-1(triggering receptors expressed on myeloid cells, TREM-1)是新近發(fā)現(xiàn)的表達(dá)于中性粒細(xì)胞、成熟單核細(xì)胞以及某些亞群巨噬細(xì)胞表面的分子[1]。它屬于免疫球蛋白超家族成員,能夠在一種稱為DAP12的銜接蛋白的幫助下激活下游信號(hào)通路,導(dǎo)致趨化因子如IL-8等和前炎癥細(xì)胞因子如TNF-α和IL-1β等產(chǎn)生[2]。急性胰腺炎(AP)是一種以爆發(fā)性炎癥為特征的疾病,發(fā)病早期炎癥因子表達(dá)即升高。為此,本試驗(yàn)檢測(cè)AP患者血TREM-1及炎癥因子TNF-α、IL-8、IL-1β水平,分析兩者的關(guān)系,探討TREM-1預(yù)測(cè)AP患者預(yù)后的臨床應(yīng)用價(jià)值。
一、臨床資料
收集我院2006年9月到2009年7月收治的19例AP患者,診斷符合中華醫(yī)學(xué)會(huì)消化病學(xué)分會(huì)胰腺病學(xué)組的診斷標(biāo)準(zhǔn)[3]。所有患者病程均在24 h之內(nèi),均未接受任何治療,近1個(gè)月無(wú)感染并排除感染性炎癥、燒傷、惡性腫瘤、糖尿病、肝功能損害及其他代謝性疾病,且未使用糖皮質(zhì)激素。以參加體檢的健康者20例作為對(duì)照組。AP組中,男7例,女12例,年齡9~61歲,平均(34±13)歲,對(duì)照組中男性9例,女性11例,年齡7~57歲,平均(35±11)歲。兩組性別構(gòu)成、年齡的差異均無(wú)統(tǒng)計(jì)學(xué)意義。以住院20 d為觀察終點(diǎn),根據(jù)其預(yù)后分為好轉(zhuǎn)組和惡化組。好轉(zhuǎn)組定義為患者好轉(zhuǎn)或病情無(wú)惡化者;惡化組定義為住院期間病死或出現(xiàn)胰腺炎并發(fā)癥的患者。
二、TREM-1、TNF-α、IL-8、IL-1β水平檢測(cè)
清晨空腹抽取靜脈血,分離血清后-20℃保存待測(cè)。血清TREM-1及TNF-α、IL-8、IL-1β均采用ELISA法測(cè)定,TNF-α、IL-8、IL-1β試劑盒購(gòu)于北京愛(ài)迪博生物科技有限公司,TREM-1試劑盒購(gòu)于上海玉博生物科技有限公司。按照試劑盒說(shuō)明書(shū)操作。
三、統(tǒng)計(jì)學(xué)方法
一、血TREM-1、TNF-α、IL-8、IL-1β含量
AP組血TREM-1、TNF-α、IL-8、IL-1β含量分別為(83.09±32.49)pg/ml、(52.26+ 12.98)pg/ml、(20.18±9.81)pg/ml和(35.57±13.34)pg/ml;對(duì)照組分別為(8.44±8.42)pg/ml、(18.69±6.42)pg/ml、(9.81±4.80)pg/ml和(14.94±5.16)pg/ml,AP組均顯著高于對(duì)照組,t值分別為8.278、10.148、4.651和6.304,P值均為0.000。
二、AP患者TREM-1與TNF-α、IL-8、IL-1β的相關(guān)性分析
TREM-1與TNF-α、IL-8、IL-1β均呈正相關(guān)(P值均lt;0.05,圖1)。
三、TREM-1、TNF-α、IL-8、IL-1β判斷臨床預(yù)后的價(jià)值
本組19例患者中,好轉(zhuǎn)10例,惡化9例。TREM-1、TNF-α、IL-8、IL-1β的ROC曲線見(jiàn)圖2,以TREM-1的ROC曲線面積最大(0.739)。以TREM-1≥79.36 pg/ml為判斷預(yù)后的標(biāo)準(zhǔn),敏感性為77.8%,特異性為70.0%;以TNF-α≥52.72 pg/ml為判斷預(yù)后標(biāo)準(zhǔn),敏感性為66.7%,特異性為60%;以 IL-1β≥33.67 pg/ml為判斷預(yù)后標(biāo)準(zhǔn),敏感性為55.6%,特異性為70%;以IL-8≥21.57 pg/ml為判斷預(yù)后標(biāo)準(zhǔn),敏感性為44.4%,特異性為80%。
對(duì)于急性胰腺炎(AP),其機(jī)體代謝功能障礙程度不僅僅只是由于AP直接對(duì)消化系統(tǒng)損傷所造成。炎癥因子的激活及其一系列瀑布反應(yīng)可誘發(fā)全身炎癥反應(yīng)綜合征,導(dǎo)致多器官功能衰竭。本試驗(yàn)結(jié)果顯示,早期AP患者在排除其他炎癥性疾病情況下,血清TNF-α、IL-8、IL-1β及TERM-1水平均顯著高于對(duì)照組,說(shuō)明在AP的早期,患者就已經(jīng)存在炎癥因子水平異常升高[4]。
圖11a、1b、1c分別為TREM-1與TNF-α、IL-8、IL-1β散點(diǎn)圖圖2各種因子及TERM-1在急性胰腺炎早期預(yù)后的判斷價(jià)值
TERM-1作為中性粒細(xì)胞及巨噬細(xì)胞分泌的一種炎癥因子,與相應(yīng)的配體結(jié)合后,與脂多糖(LPS)協(xié)同作用,促進(jìn)TNF-α和粒細(xì)胞巨噬細(xì)胞集落刺激因子(GM-CSF)的合成和釋放,并抑制IL-10的產(chǎn)生[5]。在LPS誘發(fā)的感染性休克小鼠模型中,阻斷TREM-1的信號(hào)可以保護(hù)小鼠免于死亡[5]。因此,TREM-1被認(rèn)為在LPS或細(xì)菌感染的炎癥反應(yīng)中具有放大作用。同樣有研究報(bào)道[6], AP時(shí)TREM-1水平急劇升高,進(jìn)而激活I(lǐng)L-8、IL-1β等炎癥因子,加重病情發(fā)展。本資料顯示,早期AP患者TREM-1水平升高,且與TNF-α、IL-8、IL-1β呈明顯正相關(guān)關(guān)系,支持上述的觀點(diǎn)。
尋找正確判斷AP患者預(yù)后的敏感指標(biāo)一直以來(lái)是眾多臨床科研工作者研究的熱點(diǎn)。本研究分析TNF-α、IL-8、IL-1β及TERM-1對(duì)AP預(yù)后的判斷價(jià)值,結(jié)果發(fā)現(xiàn)TERM-1判斷預(yù)后的價(jià)值較TNF-α、IL-8及IL-1β為好,與既往研究結(jié)果相似[6],提示TERM-1可能是一種有效地判斷AP患者預(yù)后的指標(biāo)。但由于本次研究標(biāo)本量較少,其診斷效果還有待于進(jìn)一步深化證實(shí)。
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2009-07-20)
(本文編輯:屠振興)
Serumlevelsoftriggeringreceptorexpressedonmyeloidcells-1andinflammatoryfactorsinpatientswithacutepancreatitisanditsclinicalvalues
ZHOUShao-bi,LIANGHua-sheng.
DepartmentofEndocrinology,NinthAffiliatedHospital,GuangxiMedicalUniversity,Beihai536000,China
LIANGHua-sheng,Email:flowchaos@yahoo.com.cn
ObjectiveTo determine the serum levels of triggering receptor expressed on myeloid cells-1(TREM-1), analyse its relationship with inflammatory factors, and explore its clinical values.MethodsSerum concentrations of TREM-1, TNF-α, IL-8 and IL-1β in 19 patients with early acute pancreatitis (AP) were measured by enzyme-linked immunoadsorbent assay and the relationship among them was analyzed, and it was compared with those of 20 normal controls.ResultsIn patients with early AP, serum levels of TNF-α, IL-8, IL-1β and TREM-1 were (52.26±12.98) pg/ml, (20.18±9.81) pg/ml, (35.57±13.34) pg/ml and (83.09±32.49) pg/ml; while they were (18.69±6.42) pg/ml, (9.81±4.80) pg/ml, (14.94±5.16) pg/ml and (8.44±8.42) pg/ml in control group, and there was significant difference between the two groups (Plt;0.01). TREM-1 was positively correlated with other inflammatory factors in patients with early AP, and it had a sensitivity of 77.8%, specificity of 70.0% for prognosis prediction, which was better than TNF-α, IL-8, IL-1β.ConclusionsTREM-1 may influence the levels of inflammatory factors and to some extent predict the early prognosis of AP.
Pancreatitis; Myeloid cells; Chemokines
10.3760/cma.j.issn.1674-1935.2010.02.006
536000 北海,廣西醫(yī)科大學(xué)第九附屬醫(yī)院急診科(周少碧),內(nèi)分泌代謝科 (梁華晟)
梁華晟,Email:flowchaos@yahoo.com.cn