EXPRESSION AND REVERSION OF DRUG RESISTANCE-AND APOPTOSIS-RELATED GENES OF A DDP-RESISTANT LUNG ADENOCARCINOMA CELL LINE

Objective: To investigate the co-expression of drug resistance- and apoptosis-related genes of cisplatin (CDDP)-selected lung adenocarcinoma cell line A 549 DDP for compared to the parental cell line A549, and reverse of drug resistance by antisense s-oligodeoxynucleotides (S-ODNs) of differentially expressed genes. Methods: Sense and antisense S-ODN were transferred into A 549 DDP cells by lipofectin. The expression of drug resistance and apoptosis related genes was examined by RT-PCR, immunocytochemistry and flow cytometry, respectively. Apoptostic cells were identified by DNA electrophoresis and terminal deoxynucleotidyl transferase (TdT)-mediated biotin dUTP nick end-labeling(TUNEL). Drug resistance of tumor cells was detected by a cell viability (MTT) assay. Results: The expression of bcl-2 was positive and that of multidrug resistance-associated protein (MRP) at mRNA and protein level was increased in A 549 DDP compared to A549 cells. MDR1, c-myc and topoisomeras II (TOPO II) were similarly co-expressed in two cell lines. Both cell lines were negative for c-erbB-2 expression. In A 549 DDP cells, the expression of bcl-2 and MRP was significantly inhibited by their respective antisense S-ODNs. Antisense S-ODNs could also decrease significantly drug resistance of A 549 DDP cells to CDDP by promoting cell apoptosis. Conclusion: Both intrinsic and acquired drug resistance were involved in co-expression of multiple MDR-related genes in lung adenocarcinoma. Cooperation of bcl-2 and MRP genes appeared to play an important action to confer the resistance of A 549 DDP cells to CDDP. Their antisense S-ODNs are responsible for the decrease of drug resistance of this cell line by promoting apoptosis.

Gene Polymorphisms and Chemotherapy in Non-small Cell Lung Cancer

The phamacogenetics is being used to predict whether the selected chemotherapy will be really effective and tolerable to the patient. Irinotecan,oxidized by CYP3A4 to produce inactive compounds,is used for treatment of various cancers including advanced non small cell lung cancer (NSCLC) patients. CYP3A4*16B polymorphism was associated with decreased metabolism of irrinotecan. Irinotecan is also metabolized by carboxylesterase to its principal active metabolite,SN-38,which is subsequently glucuronidated by UGT1As to form the inactive compound SN-38G. UGT1A1*28 and UGT1A1*6 polymorphisms were useful for predicting severe toxicity with NSCLC patients treated with irinotecan-based chemotherapy. Platinum-based compounds (cisplatin,carboplatin) are being used in combination with new cytotoxic drugs such as gemcitabine,paclitaxel,docetaxel,or vinorelbine in the treatment of advanced NSCLC. Cisplatin activity is mediated through the formation of cisplatin-DNA adducts. Gene polymorphisms of DNA repair factors are therefore obvious candidates for determinants of repair capacity and chemotherapy efficacy. ERCC1,XRCC1 and XRCC3 gene polymorphisms were a useful marker for predicting better survival in advanced NSCLC patients treated with platinum-based chemotherapy. XPA and XPD polymorphisms significantly increased response to platinum-based chemotherapy. These DNA repair gene polymorphisms were useful as a predictor of clinical outcome to the platinum-based chemotherapy. EGFR kinase inhibitors induce dramatic clinical responses in NSCLC patients with advanced disease. EGFR gene polymorphism in intron 1 contains a polymorphic single sequence dinucleotide repeat (CA-SSR) showed a statistically significant correlation with the gefitinib response and was appeared to be a useful predictive marker of the development of clinical outcome containing skin rashes with gefitinib treatment. The other polymorphisms of EGFR were also associated with increased EGFR promoter activity. EGFR gene mutations and polymorphisms were also associated with EGFR kinase inhibitors response and toxicity.

Expression and Prognostic Significance of Multidrug Resistance Associated Protein (MRP) Gene in Non-small Cell Lung Cancer by in Site Hybridization

Objective: To study on the effect of MRP gene overexpression on prognosis of patients with non-small lung cancer (NSCLC). Methods: Paraffin-embedded tissues from 47 cases of NSCLC who had undergone radical tumor resection were examined for expression of MRP gene mRNA by in situ hybridization using labelled digoxigenin probes combined with immunohistochemistry. All the patients were retrospectively followed-up. Results: All of the 47 lung cancer specimens were found to have overexpression of MRP gene mRNA. It was significantly correlated with patients' survival time, response to chemotherapy, recurrence or metastases after surgery, but was not correlated with histology, tumor size, node status, TNM stage, degree of differentiation, age and sex. Conclusion: Overexpression of MRP gene is a marker of prognostic significance in patients with NSCLC.

The Therapeutic Effects of the Radiotherapy Plus TCM Treatment Observed in Senile Non-Parvicellular Lung Cancer Patients at the Late Stage

47 senile non-parvicellular lung cancer patients at stage Ⅲ or Ⅳ were randomly divided into a treatment group (26 cases) treated by radiotherapy plus traditional Chinese medicine (TCM) and a control group (21 cases) treated only by radiotherapy for observation of the therapeutic effects.The patients in the treatment group orally took Chinese medicine during and after the radiotherapy.There was no obvious difference in short-term therapeutic effects between the two groups,but the long-term curative effects in the treatment group was obviously superior to that in the control group (P<0.05 or P<0.01).Conclusion:radiotherapy plus TCM can prolong the survival period for senile non-parvicellular lung cancer patients.

Bioinformatics Identification of ZNFs/LINC00520/miR-181d/BCL2 Axis as a Novel Network in Cisplatin-Resistant Lung Adenocarcinoma Cells

Background: Resistance to cisplatin (DDP) leads to poor prognosis in patients with Lung Adenocarcinoma (LUAD) and limits its clinical application. It has been confirmed that autophagy promotes chemoresistance and, therefore, novel strategies to reverse chemoresistance by regulating autophagy are desperately needed. Methods: The differentially expressed lncRNAs (DElncRNAs), miRNAs (DEmiRNAs), and mRNAs (DEmRNAs) between A549 and A549/DDP cell lines were identified using the limma package in R, after gene expression profiles were obtained from Gene Expression Omnibus (GEO) database. By combining Autophagy-Related Genes (ARGs) from Human Autophagy Database (HADb), the interactions lncRNA-miRNAs and the interactions miRNAs-mRNAs respectively predicted by miRcode and miRDB/Targetscan database, the autophagy-related ceRNA network was constructed. Then, extraction of ceRNA subnetwork and Cox regression analyses were performed. A prognosis-related ceRNA subnetwork was constructed, and the upstream Transcription Factors (TFs) regulating lncRNAs were predicted by the JASPAR database. Finally, the expression patterns of candidate genes were further verified by quantitative real-time polymerase chain reaction (qRT-PCR) experiments. Results: A total of 3179 DEmRNAs, 180 DEmiRNAs, and 160 DElncRNAs were identified, and 35 DEmRNAs were contained in the HADb. Based on the ceRNA hypothesis, we established a ceRNA network, including 10 autophagy-related DEmRNAs, 9 DEmiRNAs, and 14 DElncRNAs. Then, LINC00520, miR-181d, and BCL2 were identified to construct a risk score model, which was confirmed to be a well-predicting prognostic factor. Furthermore, 5 TF ZNF family members were predicted to regulate LINC00520, whereas the RT-PCR results showed that the 5 ZNFs were consistent with the bioinformatics analysis. Finally, a ZNF regulatory LINC00520/miR-181d/BCL2 ceRNA subnetwork was constructed. Conclusions: An ZNFs/LINC00520/miR-181d/BCL2 axis as a novel network in DDP-resistant LUAD has been constructed successfully, which may provide potential therapeutic targets for LUAD.

免疫细胞及炎症因子对晚期肺癌一线化疗效果的预测价值

【目的】探讨T淋巴细胞亚群、肿瘤浸润T淋巴细胞(Tils)及炎症因子对晚期肺癌一线化疗效果的预测价值。【方法】检测98例首诊TNM分期为Ⅲ/Ⅳ期的非小细胞肺腺癌患者的血清白细胞介素1α(IL-1α)、IL-6、IL-17、γ-干扰素(INF-γ)水平及T淋巴细胞亚群CD4^(+)T、CD8^(+)T、调节性T细胞、CD57^(+)细胞、Granzyme B^(+)细胞、CD45RO^(+)细胞比例;所有患者均接受紫杉醇注射液+顺铂化疗,治疗4个周期后评定疗效,并据此分为有效组和无效组,分析化疗无效的影响因素及预测疗效的有效标志物。【结果】化疗后,98例患者中69例化疗有效,29例无效。无效组患者淋巴结转移占比及调节性T细胞、IL-1α表达水平均高于有效组(P<0.05),CD57^(+)细胞、CD45RO^(+)细胞比例均低于有效组(P<0.05)。多因素逐步Logistic回归分析结果显示,调节性T细胞、IL-1α水平高是肺癌患者化疗无效的危险因素(P<0.05),CD57^(+)细胞、CD45RO^(+)细胞比例高是保护因素(P<0.05)。受试者工作特征(ROC)曲线分析显示,调节性T细胞、CD57^(+)细胞、CD45RO^(+)细胞、IL-1α水平预测化疗效果的灵敏度分别为82.76%、86.21%、89.66%、93.10%,四者联合的灵敏度、特异度和曲线下面积(AUC)分别为82.76%、97.10%、0.957。【结论】T淋巴细胞亚群、Tils及炎症因子水平与晚期肺癌治疗效果密切相关,其可作为预测疗效的敏感指标。

驱动基因阴性非小细胞肺癌二线治疗中国专家共识

对于驱动基因阴性的晚期非小细胞肺癌(non-small cell lung cancer,NSCLC)患者而言,既往化疗一直都是标准治疗选择,而免疫检查点抑制剂(immune checkpoint inhibitors,ICIs)的加入为这部分患者提供了新的治疗选择。目前一线治疗可以选择化疗、抗血管生成药物或免疫治疗。尽管初始治疗能获得一定的有效率,但仍不可避免地会出现疾病进展或治疗失败,二线及以上治疗疗效差,患者预后不佳,临床上需要更多有效的二线治疗药物。中国临床肿瘤学会非小细胞肺癌专家委员会组织呼吸科、肿瘤科、病理科专家对驱动基因阴性人群临床研究证据进行了深入探讨,根据专家组讨论后广泛认可的临床诊疗经验,对驱动基因阴性NSCLC患者二线治疗制定了统一的专家共识,可作为中国临床医师选择驱动基因阴性NSCLC二线治疗的指导依据。

滋肾润肺方辅助化疗治疗中晚期肺癌气阴两虚证患者的临床疗效

【目的】探讨滋肾润肺方联合化疗治疗中晚期肺癌气阴两虚证患者的疗效。【方法】两院收治的80例中晚期肺癌气阴两虚证患者,随机分为化疗组与联合组,每组40例。化疗组采用常规肺癌化疗方案,联合组在此基础上同时给予滋肾润肺方口服。比较两组患者的疗效、疾病进展时间(TTP)、1年存活率、1年无进展生存(PFS)率,治疗前后中医症状积分、卡氏评分(KPS)改善情况,骨髓抑制发生情况。【结果】联合组治疗总有效率(RR)为37.5%(15/40)、疾病控制率(DCR)为82.5%(33/40),化疗组RR为27.5%(11/40)、DCR为70.0%(28/40),两组比较差异均无统计学意义(P>0.05)。化疗组TTP为6.5(4.2~8.4)个月,1年存活率为30.0%(12/40),1年PFS率为85.0%(34/40);联合组TTP为7.2(5.5~9.3)个月,1年存活率35.0%(14/40),1年PFS率为87.5%(35/40),两组比较差异均无统计学意义(P>0.05)。与治疗前比较,两组治疗后中医症状积分均明显降低,且观察组各项指标下降更显著(P<0.05)。治疗后,联合组KPS评分稳定率为90.00%(36/40),明显高于化疗组的70.00%(28/40)(P<0.05)。联合组骨髓抑制的总发生率为17.5%(7/40),低于化疗组的42.5%(17/40)(P<0.05)。【结论】滋肾润肺方联合化疗可有效改善患者的生活质量,且能降低骨髓抑制的发生率。

抗体偶联药物在非小细胞肺癌中的研究进展

肺癌是全球发病率第一位、病死率第二位的恶性肿瘤。非小细胞肺癌(non-small cell lung cancer,NSCLC)是最主要的肺癌病理分型。目前晚期NSCLC的一线标准治疗方案为免疫治疗、靶向治疗,虽然延长了患者的生存期,但获得性耐药仍是不可避免的。抗体偶联药物(antibody-drug conjugates,ADCs)是一类经由连接子将细胞毒性载荷与特异性单克隆抗体偶联制成的新型抗肿瘤药物,与化疗药物相比,ADCs具有精准识别、局部释放、患者耐受性高等优点,近年在NSCLC治疗方面显示出良好的临床获益。本文针对ADCs的作用机制、在晚期NSCLC中的临床研究进展以及存在的问题和挑战等方面进行概述。

THE CLINICAL COURSE AND TREATMENT RESULTS OF LUNG METASTASES FROM BREAST CANCER

Objective: To analyze the clinical course and treatment result of lung metastases from breast cancer Method: 122 cases with lung metastases from breast cancer were treated with chemotherapy or chemotherapy plus endocrine therapy, response was assessed according to WHO criteria and survival rate estimated using the life Table Results: The median time from initial treatment of primary tumor to lung metastases was 22 months Sites of common consecutive metastases were lung, liver and bone The overall response rate was 48% with a CR rate of 15% Compared to non DDP encompassing regimen, the CR rate was higher in DDP based chemotherapy (7% versus 21%, P <0 05) with a longer median survival time (MST) The PR rate was higher in regimens containing anthracycline (48%) than in those without anthracycline (20%, P <0 01) The response rate was similar between chemotherapy and chemotherapy plus endocrine therapy ( P >0 05) No difference in MST was observed between patients receiving anthracycline and non anthracycline encompassing regimens The 1 , 3 , 5 , and 10 year survival rate was 77%, 22%, 11%, and 10%, respectively Conclusion: Size of primary tumor, the length of disease free interval, the number of lung metastases may provide additional information for predicting patients survival after treatment of lung metastases Combination chemotherapy, especially DDP based chemotherapy may prolong survival time of patients with lung metastases from breast cancer

Inhalation treatment of lung cancer: the influence of composition, size and shape of nanocarriers on their lung accumulation and retention

Objective： Various nanoparticles have been designed and tested in order to select optimal carriers for the inhalation delivery ofanticancer drugs to the lungs. Methods： q-he following nanocarriers were studied： micelles, liposomes, mesoporous silica nanoparticles （MSNs）, poly propyleneimine （PPI） dendrimer-siRNA complexes nanoparticles, quantum dots （QDs）, and poly （ethylene glycol） polymers. All particles were characterized using the following methods： dynamic light scattering, zeta potential, atomic force microscopy, in vitro cyto- and genotoxicity. In vivo organ distribution of all nanopartides, retention in the lungs, and anticancer effects of liposomes loaded with doxorubicin were examined in nude mice after the pulmonary or intravenous delivery. Results： Significant differences in lung uptake were found after the inhalation delivery of lipid-based and non-lipid-based nanoparticles. The accumulation ofliposomes and miceUes in lungs remained relatively high even 24 h after inhalation when compared with MSNs, Q Ds, and PPI dendrimers. There were notable differences between nanoparticle accumulation in the lungs and other organs 1 and 3 h after inhalation or intravenous administrations, but 24 h after intravenous injection all nanoparticles were mainly accumulated in the liver, kidneys, and spleen. Inhalation delivery of doxorubicin by liposomes significantly enhanced its anticancer effect and prevented severe adverse side effects of the treatment in mice bearing the orthotopic model of lung cancer. Conclusion： The results of the study demonstrate that lipid-based nanocarriers had considerably higher accumulation and longer retention time in the lungs when compared with non-lipid-based carriers after the inhalation delivery. These particles are most suitable for effective inhalation treatment of lung cancer.

Treatment of Interstitial Peumopathy by Fei Tong Oral Liquid in the Malignant Tumor Patients after Radio-and/or Chemotherapy

Fei Tong Kou Fu Ye (肺通口服液 Fei Tong Oral Liquid) was used to treat 30 cases of interstitial pneumopathy after radio- and/or chemotherapy.In comparison with the control group (15 cases) treated with hormones,the therapeutic effects in improving dyspnea,cough,respiratory rate,cyanosis,findings in X-films and CT examination,partial pressure of oxygen in artery,FVC and VC were found significantly better (P<0.05).The total effective rate obtained was 83.33%.

Clinical Observation on Treatment of NonParvicellular Carcinoma of the Lung with Jin Fu Kang Oral Liquid

Jin Fu Kang Oral Liquid ([symbol: see text]), made of traditional Chinese drugs for supplementing qi and nourishing yin, was developed according to the common symptoms in lung carcinoma with deficiency of both qi and yin. Of the 96 cases in the Jin Fu Kang group, 1 case got complete remission (CR) after treatment, 8 cases partial remission (PR), 52 cases no change (NC), PR + NC covering 63.5%. Of the 52 cases in the group of Jin Fu Kang plus chemotherapy, 11 cases got PR after treatment, 26 cases NC, PR + NC covering 71.2%. Of the 25 cases in the chemotherapy group, 4 cases got PR after treatment, 11 cases NC, PR + NC covering 60.0%. The results show that the therapeutic effectiveness in the Jin Fu Kang group and the group of Jin Fu Kang plus chemotherapy was better than that in the chemotherapy group. The one-year survival rate and the two-year survival rate after treatment in the Jin Fu Kang group were 67.3% and 67.3% respectively; 66.7% and 66.7% in the group of Jin Fu Kang plus chemotherapy; and 40.3% and 0.0% in the chemotherapy group. The improvement of clinical symptoms, increase of body weight and improvement of health situation (KPS marks) after treatment in both the Jin Fu Kang group and the group of Jin Fu Kang plus chemotherapy were better than that in the chemotherapy group. Some indicators of immunology and hemogram after treatment were greatly improved in the Jin Fu Kang group, worse in the chemotherapy group, but no obvious improvement in the group of Jin Fu Kang plus chemotherapy.

Point injection of Injectio Radici Astragali for Treatment of Post-chemotherapy Adverse Reactions

With injection of Injectio Radici Astragli into the point Zusanli (ST 36), we have obtained quite satisfactory therapeutic results for treating leukopenia and the impairment in immune functions occurred in cancer chemotherapy. A report follows.

THERAPEUTIC EFFECTS OF THE COMBINED CHINESE AND WESTERN MEDICINE ON METASTATIC CARCINOMA IN THE SUPRACLAVICULAR LYMPH NODES——An Analysis of 285 Cases

Between 1985 and 1989, 285 cases of metastatic carcinoma in the supraclavicular lymph nodes were treated by the following five methods: Chinese medication, radiotherapy plus Chinese medication, chemotherapy plus Chinese medication, combined Chinese and Western medicine and expectant treatment. Analysis shows that radiotherapy plus Chinese medication has the best curative effect with an effective rate of 75.5%. The effective rates were 74.2% for the combined treatment, 55.5% for the chemotherapy plus medication, 12.5% for the Chinese medication, and none for expectant treatment.

Reversal effect of recombinant human Endostatin on cisplatin resistance in A549/DDP human lung adenocarcinoma cells in vitro

Objective： Recombinant human Endostatin （rh-Endostatin, YH-16） can reverse cisplatin resistance in A549/DDP cells. However, the possible effect of rh-Endostatin in reversing DDP-resistance in A549/DDP cells and the mechanism are needed to be investigated. Methods： Lung adenocarcinoma cell line A549 and its DDP-resistant cell line A549/DDP were treated with DDP and/or recombinant human Endostatin. Difference in drug resistance was analyzed between different regi- mens and between different cell lines after a 72 h-treatment in vitro. And below the non-cytotoxic concentration of rh-End- ostatin, the possibility of rh-Endostatin in reversing DDP-resistance in A549/DDP was evaluated. The resistance protein which was detected in the study included P glycoprotein （P-gp） and topoisomerase II （Topo-II）. Results： Rh-Endostatin below 400 IJg/mL showed no cytotoxicity in either A549 or A549/DDP after 72 h-treatment with it. The inhibited concentration of 50% （IC50） observed for DDP was （0.79 _＋ 0.05） IJg/mL in A549 and （13.2 ＋ 1.1） in A549/DDP respectively. IC50 was reduced to 2.57 ＋ 0.05 #g/mL in A549/DDP treated by rh-Endostatin below the non-cytotoxic concentrations in combination with DDP, with a reversal fold （RF） of 5.14 and a relative reversal rate of 85.6%. Apoptotic rates were 2.01%, 13.47% and 29.26% re- spectively for cells treated with rh-Endostain, DDP, and the combination. The rate of the A549/DDP control group was 0.99%. The expression level of P-gp or Topo-II was higher in A549/DDP cells than in A549 cells. Rh-Endostatin may partially reverse DDP-resistance in A549/DDP cells in vitro, with a probable mechanism related to lowering expression of P-gp and Topo-II. Conclusien： Rh-Endostatin of non-cytotoxic dose partially reversed cisptatin resistance in cisplatin-resistant human lung adenocarcinoma cell line A549/DDP. Rh-Endostatin reversed the resistance of A549/DDP cells to DDP, which may be related to decreased protein expression of P-gp and Topo-II in A549/DDP cells.

JNJ-26481585对人肺腺癌培美曲塞耐药裸鼠移植瘤的抑制作用及其机制探讨

目的:探讨JNJ-26481585对人肺腺癌培美曲塞耐药裸鼠移植瘤的抑制作用及其抗癌机制。方法:构建人肺腺癌A549/培美曲塞耐药细胞(A549/PEM)的移植瘤裸鼠模型,随机分为模型组、培美曲塞组、JNJ组、联合组(培美曲塞+JNJ),第28天治疗观察结束时处死裸鼠,剥离肿瘤组织标本待测。测定4组裸鼠肿瘤体积与体质量,计算抑瘤率,观察各治疗组药物对荷瘤裸鼠的毒副反应,TUNEL方法检测4组移植瘤细胞凋亡情况的差异,qRT-PCR检测4组移植瘤细胞FAM96A、Bax、Bcl-2基因mRNA表达水平差异,Western blot检测4组移植瘤细胞FAM96A、Bax、Bcl-2蛋白表达的差异。结果:联合组的肿瘤体积、体质量低于JNJ组,JNJ组的肿瘤体积、体质量低于培美曲塞组,联合组的抑瘤率高于JNJ组,JNJ组抑瘤率高于培美曲塞组(均P<0.05)。联合组的细胞凋亡率高于JNJ组,JNJ组细胞凋亡率高于培美曲塞组(均P<0.05)。联合组肿瘤细胞的FAM96A、Bax表达水平高于JNJ组,JNJ组FAM96A、Bax表达水平高于培美曲塞组,联合组Bcl-2表达水平低于JNJ组,JNJ组Bcl-2表达水平低于培美曲塞组(均P<0.05)。联合组与单药组比较,血细胞计数均明显下降,肝功能指标均明显升高(P<0.05);培美曲塞组与JNJ组比较,血细胞及肝功能指标无统计学差异(P>0.05)。结论:JNJ-26481585可通过激活抑癌基因FAM96A的表达、上调Bax表达及下调Bcl-2的表达来促进癌细胞凋亡,逆转肺腺癌对培美曲塞的耐药性,并与培美曲塞协同发挥抗癌作用。

DNA甲基化在肺癌顺铂耐药中的研究进展

肺癌作为最常见的恶性肿瘤之一,严重威胁人类的生命健康。铂类药物如顺铂(cisplatin,DDP)是肺癌的一线治疗药物,但其获得性耐药是肺癌治疗的主要难题,也是预后不良的关键原因。顺铂耐药的发生机制较为复杂,确切机制尚未明确。大量研究表明DNA甲基化在肺癌顺铂耐药过程中发挥关键作用,DNA异常高甲基化使染色质构象发生变化,导致多种耐药基因和抑癌基因失活。阐明其复杂机制有望为寻找预测疗效的生物标志物和治疗新靶点的确定提供依据。因此,本文就DNA甲基化在肺癌顺铂耐药过程中的作用和机制做一综述,并总结近年来的去甲基化策略,为逆转肺癌顺铂耐药提供新思路。

能谱CT参数变化预测放射及化学治疗中晚期非小细胞肺癌效果

目的观察能谱CT参数变化预测放射及化学治疗(放化疗)用于中晚期非小细胞肺癌(NSCLC)效果的价值。方法前瞻性纳入119例中晚期NSCLC患者,根据放化疗3个周期后效果分为有效组(n=42)及无效组(n=77)。比较组间及组内各时间点能谱曲线斜率(k)、碘浓度(IC)及其降低值的差异,分析能谱CT参数与放化疗效果的关系;以多因素logistic回归分析筛选放化疗效果的预测因素,绘制受试者工作特征曲线,评估以放化疗后能谱CT参数降低值预测疗效的价值。结果治疗前组间能谱CT参数差异均无统计学意义(P均>0.05)。放化疗1个及3个周期后,有效组动脉期k_(40~70 keV)、动脉期k_(40~100 keV)、静脉期k_(40~70 keV)、动脉期IC及静脉期IC均低于无效组(P均<0.05)及自身治疗前(P均<0.05);其动脉期k_(40~70 keV)、动脉期k_(40~100 keV)、静脉期k_(40~70 keV)、动脉期IC及静脉期IC降低值则均高于无效组(P均<0.05),且各参数降低值均与放化疗效果呈正相关(r:0.584~0.846,P均<0.001)。3个周期后动脉期k_(40~70 keV)、动脉期k_(40~100 keV)、静脉期k_(40~70 keV)、动脉期IC及静脉期IC为疗效的独立预测因素(P均<0.05)。联合应用1个及3个周期后各能谱CT参数降低值预测放化疗效果的曲线下面积分别为0.930和0.942,均优于各单一参数(P均<0.05),应用3个周期优于1个周期(P<0.05)。结论能谱CT参数变化可预测放化疗用于中晚期NSCLC效果。

化学治疗Ⅲ期肺鳞状细胞癌及肺腺癌后患者骨密度变化

目的观察化学治疗(化疗)Ⅲ期肺鳞状细胞癌(鳞癌)及肺腺癌后患者骨密度(BMD)变化。方法回顾性分析经病理确诊并接受规律化疗的44例Ⅲ期肺鳞癌(鳞癌组)和47例Ⅲ期肺腺癌(腺癌组),以定量CT(QCT)测量其化疗前日(基线期)及第1、2、3个周期后1周内L1~L2 BMD;比较组间基线资料,观察不同时间点组间及组内BMD差异。结果组间基线资料差异均无统计学意义(P均>0.05)。鳞癌组第3个化疗周期后BMD较腺癌组降低(t=-2.572,P=0.011),其余时间点组间BMD差异均无统计学意义(P均>0.05)。相比基线期,鳞癌组第2、3个化疗周期后BMD均显著降低(P均<0.01),其余不同时间点BMD差异均无统计学意义(P均>0.05);腺癌组化疗前、后BMD差异无统计学意义(F=0.331,P=0.803)。结论3个周期化疗后Ⅲ期肺鳞癌患者BMD降低,而腺癌患者BMD未见明显变化。