ABSTRACT. We conducted a cohort study to investigate the role of 3 single-nucleotide polymorphisms of the excision repair crosscomplementation group 1 (ERCC1) gene on the response to chemotherapy and clinical outcomes of non-small cell lung cancer (NSCLC). A total of 163 patients with newly diagnosed and histopathologically confirmed primary NSCLC were examined in our study and were followed up until December 2012. ERCC1 rs11615, rs3212986, and rs2298881 were selected and genotyped. Of the 163 patients, 86 patients showed a complete response and partial response to chemotherapy (52.76%), while 91 patients (55.83%) died from NSCLC during the follow-up period with a median survival time of 19.3 months (range, 2-60 months). Multivariate regression analysis showed that individuals carrying the rs11615 TT genotype and T allele had a significantly lower response rate to chemotherapy using the rs11615 CC genotype as the reference. For rs3212986, carriers of the rs3212986 AA genotype and A allele had a significantly lower response rate to chemotherapy when compared with the CC genotype. In the Cox proportional hazards model, patients carrying the rs11615 TT genotype and T allele and the rs3212986 AA genotype and A allele were significantly associated with increased risk of death from NSCLC. We found that polymorphisms in ERCC1 rs11615 and rs3212986 were associated with poor response to chemotherapy and shorter survival time of advanced NSCLC.
As the energy spread of intense pulsed electron beams (IPEB) strongly influences the irradiation effects, it has been of great importance to characterize the IPEB energy spectrum. With the combination of Child–Langmuir law and Monte Carlo simulation, the IPEB energy spectrum has been obtained in this work by transformation from the accelerating voltage applied to the diode. To verify the accuracy of this simple algorithm, a magnetic spectrometer with an imaging plate was designed to test the IPEB energy spectrum. The measurement was completed with IPEB generated by explosive emission electron diode, the pulse duration, maximum electron energy, total beam current being 80 ns, 450 keV, and 1 kA, respectively. The results verified the reliability of the above analysis method for energy spectrum, which can avoid intercepting the beam, and at the same time significantly improved the energy resolution. Some calculation and experimental details are discussed in this paper.
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