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您的检索式：作者名="Aldon Whitehead"
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| 1 | Tumor irradiation may facilitate the detection of tumor-specific mutations in plasma显示文摘BACKGROUND The mutation-based analysis of circulating tumor DNA(ctDNA)is a promising diagnostic tool for clinical oncology.However,it has low success rate because many cancer patients do not have detectable ctDNA in the bloodstream.AIM To evaluate whether preoperative tumor irradiation results in a transient increase of plasma ctDNA concentration due to the induction of apoptosis in radiationexposed cells.METHODS This study focused on patients with locally advanced rectal cancer,because preoperative tumor irradiation is a part of their standard treatment plan.Nine subjects,whose tumors contained KRAS,NRAS or BRAF mutations,donated serial blood samples 1 h prior to the first fraction of irradiation(at baseline),immediately after the first fraction(time 0),and 1,3,6,12,24,36,48,72 and 96 h after the first fraction.The amount of mutated gene copies was measured by droplet digital PCR.RESULTS Five out of nine patients were mutation-negative by ctDNA test at baseline;two of these subjects demonstrated an emergence of the mutated DNA copies in the bloodstream within the follow-up period.There were 4 patients,who had detectable ctDNA in the plasma at the start of the experiment;three of them showed an evident treatment-induced increase of the content of mutated RAS/RAF alleles.CONCLUSION Local tumor irradiation may facilitate the detection of tumor-specific DNA in the bloodstream.These data justify further assessment of the clinical feasibility of irradiation-assisted liquid biopsy. | Ekaterina Kuligina Fedor Moiseyenko Sergey Belukhin Ekaterina Stepanova Maria Zakharova Vera Chernobrivtseva Ikram Aliev Tatiana Sharabura Vladimir Moiseyenko Svetlana Aleksakhina Tatiana Laidus Aleksandr Martianov Maksim Kholmatov Aldon Whitehead Grigoriy Yanus Evgeny Imyanitov | 2021 | World Journal of Clinical Oncology2021，12，12： | 0 |
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