應(yīng)用MALDI-TOF-MS檢測(cè)肺鱗癌患者血清多肽并分析其與化療療效相關(guān)性
[Abstract]:Background & objective chemotherapy is the primary treatment for advanced lung squamous cell carcinoma (squamous cell carcinoma of lung,SCC). And different patients have different benefits for chemotherapeutic drugs. Therefore, it is very important to realize the optimal choice of chemotherapeutic drugs to achieve individualized predictive therapy. In this study, matrix-assisted laser desorption ionization time of flight mass spectrometry (matrix-assisted laser desorption/ionization-time of flight-mass spectrometry,MALDI-TOF-MS) was used to detect serum polypeptides in patients with primary and advanced SCC receiving paclitaxel combined with platinum chemotherapy, and the correlation between them and the effect of chemotherapy was analyzed. Methods SCC patients were treated with paclitaxel combined with platinum regimen every two cycles. Patients with complete remission (complete response,CR) or partial remission (partial response,PR) were defined as chemosensitive group and patients with progression of disease (progressive disease,PD) were defined as drug resistance group. The serum samples of 81 patients with SCC before chemotherapy were randomly divided into training group (sensitive group I and drug resistance group I) and validation group (sensitive group II and drug resistant group II), pretreatment training group) according to 3:1 ratio. The fingerprint of serum polypeptide was obtained. The differential polypeptides of sensitive group I and drug resistant group I were obtained by Clin Pro Tools system analysis. Three different biological algorithms built into the software were used to establish the model of curative effect prediction, and the optimal algorithm was selected to establish the model of curative effect prediction. The validation group was used for blind sample validation. Results there were 30 cases of sensitive group and 31 cases of drug resistance group in training group, and 10 cases in sensitive group and 10 cases in drug resistance group in validation group. In the training group, there were 96 different polypeptides in sensitive and resistant groups, 16 of which were statistically significant (P0.001). Five polypeptides (1897.75 Da,2023.93 Da,3683.36 Da,4269.56 Da,5341.29 Da) were used to establish a therapeutic effect prediction model. The recognition rate and cross validation rate of the model for chemosensitive group were 95.11 and 89.18 respectively. The accuracy of the model was 85, the sensitivity was 90.0, and the specificity was 80.0. The median progressive survival time (progress free survival,PFS) was 7.2 months (95%CI:4.4-14.5) in the sensitive group and 1.8 months (95%CI:0.7-3.5) in the resistant group. The results showed that there was a correlation between the differential polypeptide of 1: 4232.04 Da,4269.56 Da and PFS in SCC patients (P0. 001). Conclusion the difference of serum polypeptides between chemosensitive group and resistant group can be detected by MALDI-TOF-MS technique, and the preliminary therapeutic effect prediction model can be used to predict the efficacy of paclitaxel combined with platinum regimen chemotherapy. However, it is necessary to further expand the sample size and verify the model.
【作者單位】: 軍事醫(yī)學(xué)科學(xué)院附屬醫(yī)院肺部腫瘤科;國(guó)家生物醫(yī)學(xué)分析中心;
【基金】:國(guó)家重大科學(xué)儀器設(shè)備開(kāi)發(fā)專項(xiàng)(No.2011YQ170067)資助~~
【分類號(hào)】:R734.2
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