
摘要:目的 探討血清胸苷激酶(TK1)水平變化在子宮內膜癌化療過程的臨床意義。方法 采用增強化學發光法檢測137例子宮內膜癌患者在化療前、化療結束1d、化療結束后4w的血清TKl水平。結果 子宮內膜癌患者組血清TK1水平顯著高于正常對照組[1.24(0.62~1.49)pm/L ],且不同治療期的血清TKl水平差異有統計學意義(P<0.01)。結論 血清TK1檢測在子宮內膜癌患者化療的臨床療效判斷及復發預后中有重要的參考價值。
關鍵詞:胸苷激酶1;子宮內膜癌;藥物療法
Changes of Serum TKI Level During Chemotherapy of Patients with Endometrial Cancer and Its Significance
XIAO Mei,XU Ping-ping,CHEN Sai-ying
(Department of Obstetrics and Gynecology, The 81st Hospital of PLA, Nanjing 210002,Jiangsu,China)
Abstract:Objective To reveal the significance of serum TKl level change during chemotherapy of patients with endometrial cancer.Methods The blood serum TKl levels were detected by western blot-enhanced chemiluminecence assay in 137 patients with endometrial cancer before chemotherapy and one day、four weeks after chemotherapy.Results The levels of TK1 in patients with endometrium carcinoma were much higher than normal controls.The changes of blood serum TK1 levels were stastistical significantly at different stages of treatment(P<0.01).Conclusion The blood serum TKl examination might possess of great reference value in evaluation of the treatment outcomes and predicting recurrence of patients with endometrial cancer.
Key words:Thymidine kinase 1;Endometrial cancer;Drug therapy
作為婦科最常見的惡性腫瘤,子宮內膜癌因其在生物學行為和解剖位置上的特殊性,在診斷過程中應用的主要手段還是影像學檢查和診刮,本研究對137例子宮內膜癌患者進行了化療不同階段的血清胸苷激酶(TKl)測定。以觀察其在子宮內膜癌的療效監測、預后判斷等方面的作用。
1資料與方法
1.1一般資料 共檢測子宮內膜癌患者共137例,均經病理學確診,均行術后化療,年齡29~62歲。正常對照組121例,為本院體檢健康女性,年齡28~68歲,正常對照組為去除貧血、女性月經期等處于細胞增殖狀態的健康人。
1.2方法 所有患者均用TAP或AP方案化療。在化療前1d、化療后1d、化療后4w分別抽取患者的靜脈血進行血清TKl檢測。
1.3統計學處理 計量資料以(x±s)表達,采用方差分析。數據處理均用Stata8.0。
2 結果
2.1療效判定 化療后按照RECIST標準評定療效,78例完全緩解,52例部分緩解,3例穩定,4例進展。化療前1d、化療后1d、化療后4w患者血清TKl濃度分別為(21.59±8.03)、(24.77±9.98)、(15.37±4.17)、(3.92±4.97)pmol/L,對照組分別為(1.47±0.45)、(1.38±0.37)、(1.34±0.31)、(1.37±0.29)pmol/L。
2.2統計學處理結果 如表1所示,化療結束后4w,完全緩解、部分緩解、穩定、進展及對照組TKl濃度分別為(2.72士0.53)、(4.31±2.29)、(2.17±0.36)、(11.65±3.85)、(1.47±0.40)pmol/L。結果表明不同時間、不同組別間存在顯著差異(F=68.82,P<0.00001)。應用Kruskal-wallis檢驗顯示在不同時間治療組、不同療效組間有顯著差異(χ2=64.03,P=0.0001;χ2=16.09,P=0.0004)。
3討論
胸腺嘧啶核苷激酶(簡稱TK)是合成DNA的嘧啶補救途經激酶[2],TKl參與細胞周期的調控[3]。TK1具有很高的增殖特異性和方法敏感性,正常情況下含量極微,幾乎檢測不出[4],一旦發生癌變,伴隨著腫瘤細胞的急劇增殖,TK1的活性和含量都將升高[5],故TKl能夠作為腫瘤患者疾病發生、發展和預后的重要指標[6]。
根據結果來看:對比化療前患者和對照組,化療前患者的TKl值要明顯高于對照組(P<0.001)。在不同化療階段的患者的TKl變化也不同,化療結束后1d,患者的TKl值有大幅度的增長;化療結束后4w,TKl值有明顯下降趨勢。其原因可能為:①該期尚處于TKl的半衰期內,血清中有殘留的TKl[7、8];②化療導致大量癌細胞溶解壞死,TKl酶大量向血清中釋放,從而使血清TKl水平升高;③抑殺癌細胞速度緩于癌細胞增殖速度,腫瘤已復發或轉移,腫瘤細胞正高增殖中[9]。
結束化療4w的患者,其血清內的TKl含量要比治療前低,CR患者的血清內的TKl值正常,說明TKl結果表達和治療得到的結果相同。出現TKl值回落的理由可能是:患者在經過化療之后,其身體內部的腫瘤細胞失活。但原有腫瘤細胞消耗了機體的代謝,導致ATP和DNA的合成受到抑制。
參考文獻:
[1] He Q, Zhang P , Zou L , et al . Concentration of thymidine kinase 1 in serum(S-TK1)is a more sensitive proliferation marker in human solid tumors than its activity [J].Oncol Rep,2005,14(4):1013-1019.
[2] Hallek M,Touitou Y,Levi F,et al .Serum thymidine kinase levels are elevated exhibit diunral variations in patients with advanced endometrium cancer[J].Clin Chim Acta, 2001,267(2):155-166.
[3]Ke Py,Chang ZF.Mitotic degradation of human thymidine kinase 1 is dependent on the anaphase-promoting omplex/cyclosme-CDH1-mediated pathway[J].Mol Cell,2012,24:514-526.
[4]Wu CJ,Yang RJ,Zhou J,et al.production and characterisation of a novel chicken IgY antibody raised against C-terminal petide from human thymidine kinase 1[J].J Immunol Methods,2009,277:157-169.
[5]He Q ,Skog S ,Wang N ,et al .Characterization of apeptide antibody against a C–terminal part of human and mouse cytosolic thymidine kinase,which is a marker for cell proliferation[J].Eur J Cell Biol,2005 ,70 (2):117-124.
[6]He Q,Zou, Zhang PG,Liu J,Skog.S,Fonander T.The clinical significance of thymidine kinase 1 measurement in serum of breast cancer patients using anti-TK1antibody[J].Intl. Biol. Marker 2011;15:139-146.
[7]zhang J,Jia Q,Zou S,et al.Thymidine kinase 1:a proliferation marker for determining prognosis and monitoring the surgical outcome of primary bladder carcinoma patients[J].Oncol Rep,2011,15(2):455-461.
[8]He Q,Zou L,Zhang PA,et al.Concentration of thymidine kindase 1 in serum(S-TK1) is a more sensitive proliferation marker in human solid rumors than its activity[J].Oncol Rep,2008,14:1013.
[9] wang N, He Q,Skog S,et al.investigation on cell prlliferation with a new antibody against thymidine kinase 1 [J].Anal cell pathol, 2012,23(1):11-19.
[10] Gilles SI,Romain S,Casellas P, et al. Mutaion analysis in the coding sequence of thymidine kinase 1 in breast and colorectal cancer [J].Int Biol Markers,2007,18(1):1-6.
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