張 靜,周子嬌
1. 唐山市人民醫(yī)院腫瘤內(nèi)科,河北 唐山063001; 2. 唐山市豐南區(qū)中醫(yī)院內(nèi)一科
替吉奧治療胃癌的臨床療效與外周血內(nèi)DPD mRNA和 TS mRNA表達(dá)水平的相關(guān)性
張 靜1,周子嬌2
1. 唐山市人民醫(yī)院腫瘤內(nèi)科,河北 唐山063001; 2. 唐山市豐南區(qū)中醫(yī)院內(nèi)一科
目的 分析替吉奧(S-1)治療胃癌的臨床療效與外周血內(nèi)二氫嘧啶脫氫酶(Dihydropyrimidine dehydrogenase, DPD)mRNA和胸苷酸合成酶(Thymidine synthetase, TS)mRNA表達(dá)水平的相關(guān)性。方法 選取唐山市人民醫(yī)院2013年3月-2014年3月接受含S-1方案治療的75例胃癌患者為研究對象,并進(jìn)行前瞻性分析?;颊呋熐俺槿】崭轨o脈血7 ml,并檢測其DPD mRNA、TS mRNA表達(dá)水平。結(jié)果 Lauren分型為腸型患者的DPD mRNA高表達(dá)率高于彌漫型患者;有遠(yuǎn)處轉(zhuǎn)移患者的TS mRNA高表達(dá)率高于無遠(yuǎn)處轉(zhuǎn)移者(P<0.05)。療效判定為進(jìn)展(PD)的患者,DPD、TS mRNA表達(dá)水平高于部分緩解(PR)、穩(wěn)定(SD)患者;PR患者外周血DPD、TS mRNA表達(dá)水平低于SD患者(P<0.05)。DPD mRNA、TS mRNA表達(dá)與臨床療效均呈負(fù)相關(guān)(r=-0.713,r=-0.735,P<0.05)。不同毒副作用分級患者外周血DPD mRNA與TS mRNA表達(dá)比較,差異無統(tǒng)計學(xué)意義(P>0.05)。外周血DPD mRNA及TS mRNA高表達(dá)患者OS低于低表達(dá)患者(P<0.05)。結(jié)論 根據(jù)患者外周血DPD mRNA和TS mRNA表達(dá)水平可早期評估患者預(yù)后及治療效果,為胃癌患者生存質(zhì)量的改善奠定基礎(chǔ)。
替吉奧;胃癌;療效;二氫嘧啶脫氫酶;胸苷酸合成酶;相關(guān)性
早期診斷與及時實施根治性切除手術(shù)是保證胃癌患者生存質(zhì)量的關(guān)鍵,但目前60%~80%的胃癌患者確診時已進(jìn)入進(jìn)展期或轉(zhuǎn)移期,失去了手術(shù)治療的機(jī)會,僅能接受姑息性化療[1]。替吉奧(S-1)是一種新型口服氟尿嘧啶類復(fù)方制劑,較傳統(tǒng)胃癌化療藥物5-氟尿嘧啶(5-Fu)而言,該藥療效更佳且毒副作用更小,在胃癌的臨床治療中得到了一定范圍的應(yīng)用。但多數(shù)研究均發(fā)現(xiàn),相同病理分型、臨床分期及治療方案的患者,其療效與生存質(zhì)量存在顯著性差異,因此,明確這一差異的根源是指導(dǎo)個體化治療、提高治療效果的關(guān)鍵[2]。二氫嘧啶脫氫酶(Dihydropyrimidine dehydrogenase, DPD)和胸苷酸合成酶(Thymidine synthetase, TS)是5-Fu代謝過程中的關(guān)鍵酶,近年來在胃癌化療治療敏感性分析中得到了廣泛關(guān)注[3]。本研究對75例胃癌患者外周血內(nèi)DPD mRNA和TS mRNA表達(dá)水平進(jìn)行了檢測,分析其對S-1治療效果的影響。
1.1 病例資料 收集唐山市人民醫(yī)院2013年3月-2014年3月接受含S-1治療方案的75例胃癌患者為研究對象,進(jìn)行前瞻性分析。其中男49例,女26例,年齡42~79歲,平均年齡(59.71±8.37)歲。本研究經(jīng)唐山市人民醫(yī)院醫(yī)學(xué)倫理委員會批準(zhǔn),患者均知情同意并簽署知情同意書。
1.2 選取標(biāo)準(zhǔn)及排除標(biāo)準(zhǔn) 選取標(biāo)準(zhǔn):(1)經(jīng)組織學(xué)檢查或細(xì)胞學(xué)檢查確診復(fù)發(fā)或轉(zhuǎn)移性胃癌,無手術(shù)指征[4]。(2)年齡18~80歲,自愿接受S-1方案化療。(3)體力狀況Karnofsky評分(KPS評分)≥70分,預(yù)期生存期≥3個月。(4)無抗腫瘤治療史或距離上次化療>6個月、距離上次放療>3個月。(5)腫瘤可測量病灶≥1個。排除標(biāo)準(zhǔn):(1)入院白細(xì)胞(WBC)<4×109/L、中性粒細(xì)胞絕對數(shù)(ANC)<1.5×109/L、血紅蛋白<100 g/L或血小板(PLT)<100×109/L。(2)血清膽紅素高于正常上限。(3)若未合并肝轉(zhuǎn)移,血清轉(zhuǎn)氨酶>正常上限2.5倍,若合并肝轉(zhuǎn)移,血清轉(zhuǎn)氨酶>正常上限5倍。(4)尿素氮>正常上限1.25倍。(5)合并其他化療禁忌證。
1.3 研究方法
1.3.1 治療方案:患者均在常規(guī)止吐、保肝、水化、抑酸、止瀉、預(yù)防過敏、營養(yǎng)支持、抗貧血、保護(hù)免疫功能等治療的基礎(chǔ)上加用S-1方案化療,化療方案[5]:S-1(江蘇恒瑞醫(yī)藥股份有限公司,國藥準(zhǔn)字H20113281,規(guī)格20 mg×42 粒)口服治療,2次/d,每日總劑量80 mg/m2,d1~d14,21 d為1個周期;順鉑(齊魯制藥有限公司,國藥準(zhǔn)字H37021358,規(guī)格10 mg)靜脈滴注,劑量75 mg/m2,d1,21 d為1個周期。每2個周期實施療效評價1次,根據(jù)療效評定結(jié)果調(diào)整治療方案。
1.3.2 觀察指標(biāo):(1)療效評價[6]:參照實體瘤療效評價標(biāo)準(zhǔn)(RECIST v1.1)對患者治療2個周期后的臨床療效進(jìn)行評價:部分緩解(PR):病灶長徑之和較治療前減少≥30%;進(jìn)展(PD):病灶長徑之和較治療前增加≥20%或出現(xiàn)新病灶;穩(wěn)定(SD):病灶長徑較治療前減少<30%或增加<20%。(2)毒副作用觀察:依據(jù)抗癌藥物常見毒副作用分級標(biāo)準(zhǔn)對患者治療期間毒副作用進(jìn)行觀察[7],包括WBC減少、PLT減少、血紅蛋白下降、惡心嘔吐、腹瀉、口腔黏膜炎等,毒副作用分級0~Ⅲ級,分級越高毒副作用越嚴(yán)重。(3)外周血DPD mRNA和TS mRNA表達(dá)水平檢測:抽取患者化療前空腹肘靜脈血7 ml,置于二鈉EDTA抗凝管中,抽提mRNA統(tǒng)一保存于-80 ℃冰箱中待測。使用逆轉(zhuǎn)錄聚合酶鏈?zhǔn)椒磻?yīng)(RT-PCR)檢測mRNA,應(yīng)用Quantity One軟件(美國Bio-rad公司)對mRNA相對表達(dá)量進(jìn)行分析[8]。以DPD mRNA>2.53、TS mRNA>0.636為高表達(dá)[9],比較不同臨床病理特征、不同臨床療效、不同毒副反應(yīng)分級患者外周血DPD mRNA和TS mRNA表達(dá)水平,并分析其與患者臨床療效的相關(guān)性。(4)生存狀況分析:采用電話隨訪、門診隨診等形式,對患者進(jìn)行為期2年的隨訪,對其生存情況進(jìn)行觀察,總生存期(OS)定義為自患者入組時至全因死亡時間,應(yīng)用Kaplan-Meier法繪制生存曲線,比較不同DPD mRNA、TS mRNA表達(dá)水平患者化療后生存曲線的區(qū)別。
2.1 臨床病理特征Lauren分型為腸型患者,DPDmRNA高表達(dá)率顯著高于彌漫型,有遠(yuǎn)處轉(zhuǎn)移患者,其TSmRNA高表達(dá)率顯著高于無遠(yuǎn)處轉(zhuǎn)移者,差異有統(tǒng)計學(xué)意義(P<0.05,見表1)。
表1 不同臨床病理特征患者外周血DPD mRNA和TS mRNA表達(dá)比較[例數(shù)(%)]
Tab 1 Comparison of DPD mRNA and TS mRNA expressions in peripheral blood of patients with different clinical pathological characteristics [n(%)]
病理特征 例數(shù)DPDmRNA高表達(dá)χ2值P值TSmRNA高表達(dá)χ2值P值性別 男4919(38.78)0.245>0.0526(53.06)0.407>0.05 女269(34.62)15(57.70)年齡(歲) <604215(35.71)0.771>0.0525(59.52)0.359>0.05 ≥603313(39.39)16(48.48)腫瘤直徑(cm) <53413(38.24)0.369>0.0518(52.94)0.441>0.05 ≥54115(36.59)10(24.39)浸潤 T2114(36.36)0.582>0.056(54.55)0.187>0.05 T34011(27.50)19(47.50) T42413(54.17)16(66.67)Lauren分型 腸型3920(51.28)6.970<0.0525(64.10)0.260>0.05 彌漫型368(22.22)16(44.44)遠(yuǎn)處轉(zhuǎn)移 無199(47.37)0.532>0.055(26.32)9.417<0.05 有5619(33.93)36(64.29)分化程度 高92(22.22)0.455>0.056(66.67)0.335>0.05 中226(27.27)11(50.00) 低4420(45.45)24(54.55)
2.2 臨床療效 PD患者的DPD mRNA和TS mRNA表達(dá)水平顯著高于PR、SD患者,PR患者外周血DPD mRNA和TS mRNA表達(dá)水平顯著低于SD患者,差異有統(tǒng)計學(xué)意義(P<0.05,見表2)。DPD mRNA及TS mRNA表達(dá)與臨床療效均呈顯著負(fù)相關(guān)(r=-0.713,r=-0.735,P<0.05)。
2.3 毒副作用 不同毒副作用分級患者外周血DPD mRNA和TS mRNA表達(dá)比較,差異無統(tǒng)計學(xué)意義(P>0.05,見表3)。
分組例數(shù)DPDmRNATSmRNAPR組281.17±0.250.34±0.09SD組251.97±0.46?0.63±0.15?PD組224.39±0.74?#0.96±0.20?#F值6.9535.874P值>0.05>0.05
注:與PR比較,*P<0.05;與SD比較,#P<0.05。
毒副作用DPDmRNAP值TSmRNAP值WBC減少 0級2.13±0.84>0.050.69±0.11>0.05 Ⅰ級2.15±0.710.68±0.15 Ⅱ級2.19±0.650.71±0.23 Ⅲ級2.16±0.530.70±0.21PLT減少 0級2.20±0.47>0.050.68±0.14>0.05 Ⅰ級2.18±0.390.73±0.12 Ⅱ級2.19±0.480.70±0.13 Ⅲ級2.16±0.440.71±0.10
續(xù)表3
毒副作用DPDmRNAP值TSmRNAP值血紅蛋白下降 0級2.25±0.63>0.050.69±0.15>0.05 Ⅰ級2.22±0.430.65±0.17 Ⅱ級2.17±0.910.71±0.23 Ⅲ級2.16±0.580.68±0.11惡心嘔吐 0級2.09±0.94>0.050.70±0.14>0.05 Ⅰ級2.21±0.540.65±0.23 Ⅱ級2.13±0.650.68±0.15腹瀉 0級2.14±0.71>0.050.68±0.13>0.05 Ⅰ級2.15±0.820.69±0.14 Ⅱ級2.19±0.950.69±0.15口腔黏膜炎 0級2.30±0.85>0.050.70±0.12>0.05 Ⅰ級2.26±0.410.66±0.17 Ⅱ級2.17±0.340.64±0.18
2.4 隨訪結(jié)果 外周血DPD mRNA和TS mRNA高表達(dá)患者平均OS分別為(5.67±0.72)個月、(7.86±0.80)個月,低于低表達(dá)患者的(8.07±0.88)個月、(13.33±0.73)個月,差異有統(tǒng)計學(xué)意義(P<0.05,見圖1)。
圖1 不同TS mRNA與DPD mRNA表達(dá)患者生存曲線
早期胃癌患者臨床表現(xiàn)以惡心、嘔吐為主,就診率偏低,誤診、漏診率較高,患者出現(xiàn)體質(zhì)量減輕、疼痛癥狀時,病情往往已進(jìn)展至中晚期,單純手術(shù)治療無法取得滿意的療效,選擇合適的化療方案控制腫瘤進(jìn)展是為根治性手術(shù)奠定基礎(chǔ)、改善患者生存質(zhì)量的關(guān)鍵[10]。
5-Fu是胃癌化療的首選基礎(chǔ)藥物,但近年來多數(shù)研究均表明5-Fu的遠(yuǎn)期安全性值得商榷,其對神經(jīng)系統(tǒng)的副作用可導(dǎo)致小腦萎縮,關(guān)于5-Fu引發(fā)致死性消化道反應(yīng)、血液系統(tǒng)毒性反應(yīng)的報道屢見不鮮[11]。作為一種復(fù)方制劑,S-1的組分包括替加氟、吉美嘧啶與奧替拉西鉀,其中替加氟是5-Fu的前體物質(zhì),具有較高的生物利用度,可在體內(nèi)轉(zhuǎn)化為5-Fu,其代謝產(chǎn)物5-Fu脫氧核苷酸(5-FuMP)具有較強(qiáng)的抗腫瘤作用;吉美嘧啶具有DPD拮抗功能,可抑制DPD對5-Fu的分解代謝作用,保證血漿及腫瘤組織中較高的5-Fu有效濃度,避免藥效受影響[12];奧替拉西鉀可拮抗乳清酸磷酸核糖基轉(zhuǎn)移酶(ORPT),降低消化道中5-Fu向5-FuMP的轉(zhuǎn)化功能,故可在一定程度上減輕S-1的消化道毒副反應(yīng)風(fēng)險。因此,較傳統(tǒng)化療藥物而言,S-1具有給藥方便、抗腫瘤作用強(qiáng)、消化道毒副作用小等優(yōu)勢,已有大量研究證實S-1在惡性腫瘤治療中發(fā)揮的可靠療效[13]。
但在S-1的臨床實際應(yīng)用中,多數(shù)學(xué)者均發(fā)現(xiàn),相同腫瘤類型、臨床分期、病理類型患者在接受相同方案化療后,其臨床療效與生存質(zhì)量往往存在較大差異,而部分臨床分期、病理類型存在差異的患者,其臨床療效可能相似[14]。明確這一現(xiàn)狀的發(fā)生機(jī)制,是提高化療治療水平、指導(dǎo)個體化化療的關(guān)鍵。本研究結(jié)果示,隨著患者臨床療效的提高,其外周血DPD mRNA和TS mRNA表達(dá)水平均呈下降趨勢,說明DPD、TS高表達(dá)可能預(yù)示著患者預(yù)后不良,同時,本研究Lauren分型為腸型患者,其DPD mRNA高表達(dá)率顯著高于彌漫型,有遠(yuǎn)處轉(zhuǎn)移患者,其TS mRNA高表達(dá)率顯著高于無遠(yuǎn)處轉(zhuǎn)移者,也印證了上述結(jié)論。TS被認(rèn)為是5-Fu及其衍生物治療惡性腫瘤的靶目標(biāo),故TS表達(dá)水平的升高表明患者腫瘤組織侵襲性上升,對5-Fu藥物的敏感性下降,甚至出現(xiàn)繼發(fā)性耐藥[15]。DPD是嘧啶類分解代謝的起始和限速酶,其活性在肝臟中最高,而5-Fu進(jìn)入體內(nèi)后,約80%在肝臟組織中分解代謝,故DPD表達(dá)水平可直接影響5-Fu進(jìn)入合成代謝和產(chǎn)生5-FuMP的量,過往研究證實,DPD高表達(dá)可增加5-Fu分解,在腫瘤耐藥現(xiàn)象的發(fā)生中扮演重要角色[16]。在毒副作用、生存時間的比較中,可以發(fā)現(xiàn),外周血內(nèi)DPD mRNA和TS mRNA表達(dá)水平較高的患者,其OS顯著降低,也說明兩種酶在患者治療效果及預(yù)后的改變中發(fā)揮著重要作用,但不會影響患者不良反應(yīng)發(fā)生風(fēng)險。
綜上所述,DPD mRNA和TS mRNA表達(dá)水平較低的胃癌患者更易從S-1治療中獲益,生存時間更長。但關(guān)于DPD和TS影響患者預(yù)后的具體機(jī)制仍有待進(jìn)一步探討,從而為胃癌等惡性腫瘤的個體化治療提供指導(dǎo),為患者預(yù)后的改善奠定基礎(chǔ)。
[1]Shen XM, Zhou C, Lian L, et al. Relationship between the DPD and TS mRNA expression and the response to S-1-based chemotherapy and prognosis in patients with advanced gastric cancer [J]. Cell Biochem Biophys, 2015, 71(3): 1653-1661.
[2]Shimoda M, Kubota K, Shimizu T, et al. Randomized clinical trial of adjuvant chemotherapy with S-1 versus gemcitabine after pancreatic cancer resection [J]. Br J Surg, 2015, 102(7): 746-754.
[3]李厚強(qiáng), 余英豪. 胃癌和大腸癌 TS 基因多態(tài)性的研究進(jìn)展[J]. 世界華人消化雜志, 2013, 21(10): 865-872.
Li HQ, Yu YH. TS gene polymorphisms in gastric cancer and colorectal cancer [J]. World Chinese Journal of Digestology, 2013, 21(10): 865-872.
[4]Sasako M, Terashima M, Ichikawa W, et al. Impact of the expression of thymidylate synthase and dihydropyrimidine dehydrogenase genes on survival in stage Ⅱ/Ⅲ gastric cancer [J]. Gastric Cancer, 2015, 18(3): 538-548.
[5]Eguchi K, Oyama T, Tajima A, et al. Intratumoral gene expression of 5-fluorouracil pharmacokinetics-related enzymes in stage I and II non-small cell lung cancer patients treated with uracil-tegafur after surgery: A prospective multi-institutional study in Japan [J]. Lung Cancer, 2015, 87(1): 53-58.
[6]朱正綱, 傅國輝, 劉炳亞, 等. 分子標(biāo)志物在胃癌發(fā)病機(jī)制及轉(zhuǎn)化醫(yī)學(xué)研究中的應(yīng)用[J]. 上海交通大學(xué)學(xué)報 (醫(yī)學(xué)版), 2012, 32(9): 1185-1197.
Zhu ZG, Fu GH, Liu BY, et al. Mechanisms and translational research based on molecular biomarkers of gastric cancer [J]. Journal of Shanghai Jiaotong University (Medical Science), 2012, 32(9): 1185-1197.
[7] 陳英華, 傅建偉, 鄧媛, 等. 晚期胃癌患者外周血中 TS 和 DPD mRNA 的表達(dá)對替吉奧化療療效的影響[J]. 重慶醫(yī)學(xué), 2013, 42(12): 1357-1359.
Chen YH, Fu JW, Deng Y, et al. The predictive values of thymidylate synthase (TS) and dihydropyrimidine dehydrogenase (DPD) mRNA in advanced gastric cancers treated with S-1 [J]. Chongqing Medical Journal, 2013, 42(12): 1357-1359.
[8]Tanaka K, Saigusa S, Toiyama Y, et al. TS and DPD mRNA levels on formalin fixed paraffin embedded specimens as predictors for distant recurrence of rectal cancer treated with preoperative chemoradiotherapy [J]. J Surg Oncol, 2012, 105(6): 529-534.
[9]李定云, 張濤, 凌亞非, 等. 進(jìn)展期胃癌患者 D2 根治手術(shù)后 S-1 單藥或聯(lián)合奧沙利鉑輔助化療方案的療效對比研究[J]. 海南醫(yī)學(xué), 2015, 26(6): 812-815.
Li DY, Zhang T, Ling YF, et al. Comparative study of curative effect of S-1 monotherapy or S-1 and oxaliplatin combination chemotherapy for patients with advanced gastric cancer after D2 radical operation [J]. Hainan Med J, 2015, 26(6): 812 - 815.
[10]樊衛(wèi)飛, 王峻, 孟麗娟, 等. 替吉奧聯(lián)合奧沙利鉑對比替吉奧聯(lián)合順鉑方案一線治療老年晚期胃癌的臨床研究[J]. 臨床腫瘤學(xué)雜志, 2013, 18(1): 50-53.
Fan WF, Wang J, Meng LJ, et al. Clinical study of S-1 plus oxaliplatin versus S-1 combined with cisplatin in the first-line treatment of elderly patients with advanced gastric cancer [J]. Chinese Clinical Oncology, 2013, 18(1): 50-53.
[11]Lei Z, Tan IB, Das K, et al. Identification of molecular subtypes of gastric cancer with different responses to PI3-kinase inhibitors and 5-fluorouracil [J]. Gastroenterology, 2013, 145(3): 554-565.
[12]練煉, 慎曉明, 周沖, 等. DPDmRNA 及 TSmRNA 表達(dá)與進(jìn)展期胃癌患者含替吉奧方案的化療臨床預(yù)后的關(guān)系[J]. 海南醫(yī)學(xué), 2015, 26(6): 799-802.
Lian L, Shen XM, Zhou C, et al. The relationship between clinical prognosis and the expression of TSmRNA and DPDmRNA chemotherapy in patients with advanced gastric cancer with S-1[J]. Hainan Med J, 2015, 26(6): 799-802.
[13]Li BP, Liu JL, Chen JQ, et al. Effects of siRNA-mediated silencing of myeloid cell leukelia-1 on the biological behaviors and drug resistance of gastric cancer cells [J]. Am J Transl Res, 2015, 7(11): 2397-2411.
[14]Mori R, Yoshida K, Tanahashi T, et al. Decreased FANCJ caused by 5FU contributes to the increased sensitivity to oxaliplatin in gastric cancer cells [J]. Gastric Cancer, 2013, 16(3): 345-354.
[15]Okuma Y, Hosomi Y, Miyamoto S, et al. Erratum to: Correlation between S-1 treatment outcome and expression of biomarkers for refractory thymic carcinoma [J]. BMC cancer, 2016, 16: 272.
[16]Ogawa M, Watanabe M, Mitsuyama Y, et al. Thymidine phosphorylase mRNA expression may be a predictor of response to post-operative adjuvant chemotherapy with S-1 in patients with stage Ⅲ colorectal cancer [J]. Oncol Lett, 2014, 8(6): 2463-2468.
(責(zé)任編輯:李 健)
The correlation of clinical efficacy of S-1 in treating gastric cancer with the expressions of DPD mRNA and TS mRNA in peripheral blood
ZHANG Jing1, ZHOU Zijiao2
1. Department of Oncology, People’s Hospital of Tangshan City, Tangshan 063001; 2. Department of NO.1 Internal Medicine, Hospital of Traditional Chinese Medicine in Fengnan District of Tangshan City, China
Objective To analyze the correlation of clinical efficacy S-1 in treating gastric cancer with the expressions of Dihydrogen Dihydropyrimidine dehydrogenase (PD) mRNA and Thymidine synthase (TS) mRNA in peripheral blood.Methods Seventy-five patients with gastric cancer who were treated with S-1 in People’s Hospital of Tangshan City from Mar.2013 to Mar.2014 were selected and analyzed prospectively.7 ml of fasting venous blood before chemotherapy was collected and the DPD mRNA and TS mRNA expression levels were detected.Results The high expression rate of DPD mRNA was higher than that of diffuse type, there was a higher expression rate of mRNA TS in the patients with distant metastasis than those without distant metastasis, and the difference was statistically significant (P<0.05). The DPD mRNA and TS mRNA expression levels of patients with progressive disease (PD) were significantly higher than those in partial remission (PR), stable (SD) patients. The serum DPD mRNA and TS mRNA expression levels in PR patients were significantly lower than those in SD patients, the difference was statistically significant (P<0.05). The DPD mRNA and TS mRNA expressions were negatively correlated with clinical efficacy (r=-0.713,r=-0.735,P< 0.05). There was no significant difference in the expressions of DPD mRNA and TS mRNA in peripheral blood of patients with different toxic and side effects (P>0.05). The DPD mRNA and TS mRNA patients with high expression of peripheral blood OS were significantly lower than those with low expression, and the difference was statistically significant (P<0.05).Conclusion According to the peripheral blood DPD mRNA and TS mRNA expression levels of early assessment of prognosis and therapeutic effect, for the improvement of quality of life in patients with gastric cancer lay the foundation.
S-1; Gastric cancer; Curative effect; Two hydrogen-induced dehydrogenase; Thymidine synthase; Correlation
張靜,副主任醫(yī)師,研究方向:腫瘤放化療。E-mail:sdwxm7758@163.com
10.3969/j.issn.1006-5709.2016.11.011
R735.2
A
1006-5709(2016)11-1248-05
2016-04-21