醫(yī)學(xué)論文范文:C-12蛋白芯片檢測系統(tǒng)在消化道惡性腫瘤診斷中的應(yīng)用價值
【摘要】 目的 研究多腫瘤標(biāo)志物蛋白芯片在消化道惡性腫瘤診斷中的應(yīng)用價值。方法 采用C-12蛋白芯片檢測系統(tǒng)檢測283例消化道惡性腫瘤患者(惡性腫瘤組)、186例消化道良性疾病患者(良性疾病組)和421例正常對照者(正常對照組)血清中12種腫瘤標(biāo)志物的表達(dá)水平。結(jié)果 惡性腫瘤組的陽性率為77.74%,顯著高于良性疾病組(35.48%, P<0.01)和正常對照組(22.09%,P<0.01)。該蛋白芯片對消化道惡性腫瘤檢測的靈敏度為77.74%,特異度為73.81%,準(zhǔn)確率為75.06%,陽性預(yù)測值為58.05%,陰性預(yù)測值為87.67%;聯(lián)合檢測的陽性率均顯著高于單一標(biāo)志物檢測(P<0.05), 但是聯(lián)合檢測對臨床Ⅰ、Ⅱ期消化道惡性腫瘤的陽性率仍然偏低,為30.16%;癌胚抗原(CEA)、CA19-9、CA242、CA15-3、CA125、鐵蛋白在消化道惡性腫瘤中的表達(dá)明顯強(qiáng)于其他標(biāo)志物(P<0.05)。結(jié)論 C-12蛋白芯片檢測系統(tǒng)監(jiān)測病情和判斷預(yù)后的價值優(yōu)于診斷價值,但是用于消化道惡性腫瘤的早期診斷靈敏度不高。建議利用近年來血清腫瘤標(biāo)志物研究的最新成果,對現(xiàn)有指標(biāo)進(jìn)行優(yōu)化組合,推出一款專門針對消化道惡性腫瘤的蛋白芯片,以提高其檢測效果和早期診斷率。
【關(guān)鍵詞】 消化道惡性腫瘤;腫瘤標(biāo)志物;蛋白芯片;早期診斷
The application value of C-12 protein biochip detective system in the diagnosis
of digestive tract malignancies
XING Fei, WANG Zhuangmei, WANG Yiqiu
(Department of Gastroenterology, The First People′s Hospital of Xuzhou, Xuzhou, Jiangsu 221002, China)
Abstract: Objective To investigate the application value of C-12 protein biochip detective system in the diagnosis of digestive tract malignancies. Methods The expression of twelve tumor markers in serum were detected by protein biochip technology in 283 cases of malignant tumor of digestive tract cancer, 186 cases of benign digestive diseases and 421 cases of normal control. Results The positive ratio of 77.74% in the malignant tumor group was significantly higher than that of the benign diseases group (35.48%, P<0.01) and the normal control group (22.09%, P<0.01). The sensitivity, specificity, accuracy, positive predictive value and negative predictive value of the protein biochip system were 77.74%, 73.81%, 75.06%, 58.05%, and 87.67%, respectively. The positive ratio of combined detection was significantly higher than that of single tumor maker (P<0.05), but its positive ratio of 30.16% for staging Ⅰ and Ⅱ digestive tract cancer was still relatively low. The expression of tumor markers CEA, CA19-9, CA242, CA15-3, CA125 and ferrtin in digestive tract cancer was markedly stronger than the others (P<0.05). Conclusions The effect of C-12 protein biochip detection system on illness monitoring and prognosis judgment was better than that on diagnosis, but it had less sensitivity for the early diagnosis of digestive tract cancer. It is preferable that the existing indicators be optimized and combined according to the latest achievements of the researches on serum tumor markers in recent years and that a specific, digestive tract cancer-targeted protein biochip be designed so as to improve the detection effectiveness and the accuracy of early diagnosis of malignant tumors of the digestive tract.
Key words: digestive tract malignancies; tumor marker; protein biochip; early diagnosis
消化道惡性腫瘤的早期臨床癥狀沒有特異性,發(fā)現(xiàn)時多為晚期,甚至發(fā)生遠(yuǎn)處轉(zhuǎn)移,失去手術(shù)治療機(jī)會。早期發(fā)現(xiàn)、早期診斷和早期治療是目前提高消化道惡性腫瘤生存率的最有效途徑。多腫瘤標(biāo)志物蛋白芯片檢測系統(tǒng)具有高通量檢測、高靈敏度、高特異度和微型化的特點(diǎn),有研究表明,該技術(shù)對消化道惡性腫瘤的早期診斷具有一定的作用[1-2]。本研究采用C-12蛋白芯片檢測系統(tǒng)對食管癌、胃癌和大腸癌3種最常見的消化道惡性腫瘤患者血清中12種腫瘤標(biāo)志物進(jìn)行聯(lián)合檢測,同時選取良性疾病患者和正常人群的檢測結(jié)果作為對照,分析和比較其表達(dá)情況,并結(jié)合相關(guān)臨床資料,以探討C-12蛋白芯片檢測系統(tǒng)在消化道惡性腫瘤診斷中的應(yīng)用價值醫(yī)學(xué)全.在.線gydjdsj.org.cn。
1 資料和方法
1.1 一般資料和分組 惡性腫瘤組均為我院2005年6月—2008年12月住院治療的消化道惡性腫瘤患者,共283例,均經(jīng)病理檢查確診,其中食管癌72例,胃癌115例,大腸癌96例。臨床分期:Ⅰ期26例,Ⅱ期37例,Ⅲ期86例,Ⅳ期134例;男性178例,女性105例,平均年齡57.4歲(24~86歲)。消化道良性疾病組(良性疾病組)186例,為同期住院消化道良性疾病患者,其中反流性食管炎28例,慢性胃炎46例,消化性潰瘍62例,潰瘍性結(jié)腸炎21例,急性胰腺炎11例,急性膽囊炎18例;男性112例,女性74例,平均年齡55.6歲(21~84歲)。正常對照組421例,來源于門診健康體檢者,其中男性268例,女性153例,平均年齡49.2歲(22~81歲)。
1.2 儀器和試劑 全部由浙江湖州數(shù)康生物科技有限公司提供,包括HD-2001A生物芯片檢測儀、生物芯片圖像分析系統(tǒng)軟件、C-12蛋白芯片多種腫瘤檢測用試劑盒。
1.3 測定方法 采集空腹靜脈血2 ml,離心后收集無溶血的血清標(biāo)本,置于4℃冰箱保存待測,測試前平衡至室溫。所有步驟均嚴(yán)格按照C-12蛋白芯片檢測系統(tǒng)說明書進(jìn)行操作。
1.4 正常參考值范圍 糖鏈抗原19-9(CA19-9)<35 kU/L,神經(jīng)元特異性烯醇化酶(NSE)<13 μg/L,癌胚抗原(CEA)<5 μg/L,糖鏈抗原242(CA242)<20 kU/L,糖鏈抗原125(CA125)<35 kU/L,糖鏈抗原15-3(CA15-3)<35 kU/L,甲胎蛋白(AFP)<20 μg/L,鐵蛋白<219 μg/L(女)、322 μg/L(男),游離型前列腺特異性抗原(F-PSA)<1 μg/L,前列腺特異性抗原(PSA)<5 μg/L,人生長激素(HGH)<7.5 μg/L及人絨毛膜促性腺激素β(β-HCG)<3.00 μg/L。
1.5 結(jié)果判斷標(biāo)準(zhǔn) 檢測指標(biāo)超過臨界值即為陽性,在正常參考值范圍以內(nèi)為陰性。
1.6 統(tǒng)計學(xué)處理 采用SPSS 13.0統(tǒng)計軟件進(jìn)行統(tǒng)計分析,顯著性檢驗(yàn)使用χ2檢驗(yàn),P<0.05為差異有統(tǒng)計學(xué)意義。
2 結(jié) 果
2.1 3組C-12蛋白芯片檢測結(jié)果比較 惡性腫瘤組的總陽性率顯著高于良性疾病組(P< 0.01)和正常對照組(P<0.01)。見表1。本研究中C-12蛋白芯片對消化道惡性腫瘤檢測的靈敏度為77.74%,特異度為73.81%,準(zhǔn)確率為75.06%,陽性預(yù)測值為58.05%,陰性預(yù)測值為87.67%。表1 C-12蛋白芯片對各組檢測的總陽性率比較與惡性腫瘤組比較: