潘湘濤,陸 曄,程 旭,王金湖,李 蓉,嚴 敏
(蘇州大學(xué)附屬太倉醫(yī)院 血液科,江蘇 蘇州 215400)
癌性貧血患者血清Hepcidin及炎癥介質(zhì)因子LPS和IL-6表達及其意義
潘湘濤*,陸 曄,程 旭,王金湖,李 蓉,嚴 敏
(蘇州大學(xué)附屬太倉醫(yī)院 血液科,江蘇 蘇州 215400)
目的 研究Hepcidin在癌性貧血發(fā)生中的意義及其與炎癥介質(zhì)因子細菌脂多糖(LPS)和白細胞介素-6(IL-6)之間的關(guān)系。方法應(yīng)用雙抗夾心生物素-親和素-酶聯(lián)免疫吸附試驗(ABC-ELISA)方法檢測50例癌性貧血患者和140例無貧血癌癥患者的血清Hepcidin和LPS和IL-6,并分析Hepcidin與貧血、與IL-6以及LPS之間的相關(guān)關(guān)系。結(jié)果①癌性貧血患者血清Hepcidin為51.99±32.56μg/L明顯高于無貧血患者的36.63±31.99μg/L(P<0.01)。②癌性貧血患者血清LPS和IL-6分別為75.33±62.63μg/L和39.36±82.60ng/L,均高于無貧血患者的63.43±38.76μg/L和10.38±22.00ng/L(均為P<0.05)。③癌性貧血患者的 Hepcidin與LPS呈明顯的正相關(guān)關(guān)系(r=0.397,t=2.996,P<0.01);Hepcidin與IL-6也呈正相關(guān)關(guān)系(r=0.302,t=2.201,P<0.05)。④癌性貧血患者的Hepcidin、LPS和IL-6三者均與血紅蛋白無相關(guān)關(guān)系。結(jié)論癌性貧血患者高表達Hepcidin、LPS和IL-6,Hepcidin與LPS和IL-6均呈正相關(guān)關(guān)系;它們在癌性貧血的發(fā)生發(fā)展過程中起重要的作用。
Hepcidin;脂多糖;白介素-6;癌癥;貧血
(ChinJLabDiagn,2012,16:0055)
Hepcidin(鐵調(diào)素,又稱肝抗菌多肽)在慢性病貧血中的作用近來已受到廣泛重視,本文應(yīng)用雙抗夾心生物素-親和素-酶聯(lián)免疫吸附試驗(ABCELISA)方法檢測癌性貧血患者的血清Hepcidin和炎癥介質(zhì)因子細菌脂多糖(LPS)和白細胞介素-6(IL-6),以探討Hepcidin在癌性貧血發(fā)生中的意義及其與炎癥介質(zhì)因子LPS和IL-6之間的關(guān)系。
1.1 對象2009年6月-2010年5月在我院住院癌癥患者190例。男96例、女94例,年齡29-82歲、平均59.2歲。疾病種類為結(jié)直腸癌54例,乳腺癌45例,胃癌40例,肺癌16例,淋巴瘤14例,食道癌5例,子宮內(nèi)膜癌4例,胰腺癌3啦,腹膜間皮瘤、卵巢癌和宮頸癌各2例,上腭癌、肝癌和膽管癌各1例。
1.2 分組方法以Hb值男性<120.0g/L和女性<110.0g/L作為貧血的診斷標(biāo)準(zhǔn)。將50例貧血患者列為觀察組,將其余140例無貧血的患者作為對照組。
1.3 方法Hepcidin試劑盒購自美國DRG International Inc.USA.,LPS和IL-6試劑盒為R&D公司生產(chǎn)。清晨抽血被檢者分置于試管中,其中Hb測定應(yīng)用常規(guī)方法即時檢測,而其余血清則超低溫冰箱保存,對190例患者血清標(biāo)本同時應(yīng)用ABCELISA方法檢測Hepcidin、LPS和IL-6。
1.4 統(tǒng)計學(xué)處理應(yīng)用SPSS13.0版軟件包進行統(tǒng)計學(xué)分析,分別采用t檢驗和Spearman等級相關(guān)法。以P<0.05為有統(tǒng)計學(xué)意義。
2.1 各組血清Hepcidin、LPS和IL-6測定結(jié)果
各組血清Hepcidin、LPS和IL-6測定結(jié)果見表1,其中觀察組的Hepcidin、LPS和IL-6均明顯高于對照組(P<0.05)。
表1 各組血清Hepcidin、LPS和IL-6測定結(jié)果
2.2 相關(guān)分析分別對觀察組的Hb值與Hepcidin、LPS和IL-6三者之間進行相關(guān)分析,以及對Hepcidin與LPS和IL-6兩者之間進行相關(guān)分析。結(jié)果貧血患者的Hepcidin與LPS和IL-6均有相關(guān)關(guān)系(Hepcidin與 LPS為r=0.397,t=2.9962,P<0.01;Hepcidin與IL-6為r=0.302,t=2.2012,P<0.05);而貧血患者的 Hb值與 Hepcidin、LPS和IL-6均無相關(guān)關(guān)系(均為P>0.05)。
國外大量的研究資料表明許多炎癥介質(zhì)因子參與了Hepcidin的表達以及調(diào)節(jié)鐵代謝的過程,炎癥介質(zhì)因子和Hepcidin共同參與了慢性病貧血的發(fā)生和發(fā)展[1]。Sasu等[2]認為 Hepcidin濃度與癌性貧血患者的炎癥標(biāo)志物相關(guān),是炎癥性貧血的診斷和判斷治療療效的有效指標(biāo),是一個鐵轉(zhuǎn)運的負性調(diào)節(jié)劑[3]。本研究則著重于Hepcidin及其炎癥介質(zhì)因子LPS和IL-6在惡性腫瘤所引起的慢性病貧血中的表達特點及其臨床意義。
我們的結(jié)果表明癌性貧血患者的血清Hepcidin、LPS和IL-6均明顯高于無貧血的患者,與文獻結(jié)果基本一致,如Butterfield等[4]應(yīng)用ELISA檢測34例癌癥患者發(fā)現(xiàn)Hepcidin明顯高于正常人,Hohaus等[5]報道Hepcidin在霍奇金淋巴瘤患者中明顯升高,與IL-6顯著正相關(guān)(P<0.001),Ganz等[6]報道Hepcidin在炎癥、多發(fā)性骨髓瘤和慢性腎性疾病中是明顯升高的,并與鐵蛋白呈正相關(guān)。我們進一步的研究發(fā)現(xiàn)Hepcidin與LPS和IL-6均呈正相關(guān)關(guān)系,也與文獻報道相一致,如Hohaus等[5]報道霍奇金淋巴瘤患者中Hepcidin表達與IL-6呈顯著的正相關(guān)(P<0.001),Igor等[7]則發(fā)現(xiàn)37例慢性病貧血中Hepcidin和IL-6與對照組和缺鐵性貧血比較均明顯增高,并且Hepcidin是由LPS和IL-6所介導(dǎo)的,支持Kanda等[8]提出的在炎癥狀態(tài)下,貧血由IL-6介導(dǎo)的Hepcidin過度增多所引起的觀點。Kemna等[7]的研究表明Hepcidin是由LPS和IL-6所介導(dǎo),LPS注射給人體后導(dǎo)致IL-6的升高,之后在3~4小時 Hepcidin分泌達到高峰,Lee等[10]則通過體外細胞培養(yǎng)也證明了LPS誘導(dǎo)生成的IL-6上調(diào)Hepcidin基因表達。
我們還發(fā)現(xiàn)Hb值與Hepcidin、LPS和IL-6三者之間均無相關(guān)關(guān)系,這與Jacober等[11]報道的Hepcidin與貧血的程度和鐵參數(shù)沒有相關(guān)關(guān)系的結(jié)果相一致,但與 Hohaus等[5]報道的Hepcidin在貧血患者中與Hb呈負相關(guān),而與血清鐵蛋白呈正相關(guān)的結(jié)果不一致,這可能與所選擇的研究對象不完全一致有關(guān),與病例數(shù)多少也有一定關(guān)系。
慢性病貧血的原因很多,諸如失血、營養(yǎng)不良、溶血、促紅細胞生成素生成減少或相對分泌不足和紅系祖細胞對其反應(yīng)降低等等,但鐵代謝的異常也是一個重要的因素。從我們的研究結(jié)果和國外文獻資料來看,癌癥患者的LPS異常增高導(dǎo)致了IL-6的分泌增多,繼而誘導(dǎo)Hepcidin的增多。而Hepcidin的異常增多引起鐵代謝的異常變化,無論是通過內(nèi)分泌機制還是通過體循環(huán),都是將鐵留在儲鐵細胞中并阻止腸道鐵的吸收,因而血清鐵降低、轉(zhuǎn)鐵蛋白和轉(zhuǎn)鐵蛋白飽和度降低,造成鐵對紅系生成的限制,進而網(wǎng)狀內(nèi)皮系統(tǒng)鐵的增加和血清鐵蛋白的增多。一系列的鐵代謝改變引起機體鐵的失利用,因而導(dǎo)致發(fā)生貧血。
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Expression and significance of Hepcidin,LPS and IL-6in the patients with cancer-related anemia
PANXiang-tao,LU Ye,CHENGXu,etal.(TaicangHospitalofSuzhouUniversity,Suzhou215400,China)
ObjectiveTo study the expression and significance of Hepcidin,LPS and IL-6in patients with cancer-related anemia.MethodsTo test the serum levels of Hepcidin,LPS and IL-6in 190cases,including 50cases with cancerrelated anemia and 140cases of non-anemia with tumor by ABC-ELISA.Results①The serum levels of Hepcidin in patients with cancer-related anemia were higher than control group(51.99±32.56μg/L vs 36.63±31.99μg/L,P<0.01).②The serum levels of LPS和IL-6in patients with cancer-related anemia were 75.33±62.63ug/L and 39.36±82.60ng/L respectively,which were all higher than in cases of non-anemia with tumor respectively(63.43±38.76μg/L and 10.38±22.00ng/L respectively,P<0.05)。③In patients with cancer-related anemia,there were positive correlation both Hepcidin and LPS (r=0.397,t=2.996,P<0.01),and were positive correlation both Hepcidin and IL-6(r=0.302,t=2.201,P<0.05).④In patients with cancer-related anemia,there were no correlation between Hemoglobin and Hepcidin,LPS,and IL-6respectively.ConclusionThe expression of Hepcidin,LPS and IL-6in patients with cancer-related anemia,and there were positive correlation both Hepcidin and LPS (r=0.397,t=2.996,P<0.01),and there were positive correlation among Hepcidin,LPS and IL-6).They may be one of factors contributed the cancer-related anemia in patients with tumor.
cancer-related anemia;Hepcidin;LPS;interlukin-6(IL-6)
1007-4287(2012)01-0055-03
蘇州市2009年科技發(fā)展項目(SZD0951)
*通訊作者
R730.4
A
2011-02-17)