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Circulating tumor DNA dynamics analysis in a xenograft mouse model with esophageal squamous cell carcinoma

World Journal of Gastroenterology 2021年第41期27卷 7134-7143页

作者： Hiroyuki Terasawa Hideaki Kinugasa Kazuhiro Nouso Shumpei Yamamoto mami hirai Takehiro Tanaka Akinobu Takaki Hiroyuki Okada Department of Gastroenterology and Hepatology Okayama University Graduate School of MedicineDentistry and Pharmaceutical SciencesOkayama 7008558Japan Department of Pathology Okayama University Graduate School of MedicineDentistry and Pharmaceutical SciencesOkayama 7008558Japan

BACKGROUND It remains unclear which factors,such as tumor volume and tumor invasion,influence circulating tumor DNA(ctDNA),and the origin of ctDNA in liquid biopsy is always *** use liquid biopsies clinically,it will be very important to address these *** To assess the origin of ctDNA,clarify the dynamics of ctDNA levels,assess ctDNA levels by using a xenograft mouse after treatment,and to determine whether tumor volume and invasion are related to ctDNA *** Tumor xenotransplants were established by inoculating BALB/c-nu/nu mice with the TE11 cell *** of mice were injected with xenografts at two or four sites and sacrificed at the appropriate time point after xenotransplantation for ctDNA *** of ctDNA was performed by droplet digital PCR,using the human telomerase reverse transcriptase(hTERT)*** Mice given two-site xenografts were sacrificed for ctDNA at week 4 and week *** hTERT was detected at week 4,but it was detected at week ***,in four-site xenograft mice,hTERT was detected both at week 4 and week *** experiments revealed that both tumor invasion and tumor volume were asso ciated with the detection of *** resection experiments,hTERT was detected at resection,but had decreased by 6 h,and was no longer detected 1 and 3 d after *** We clarified the origin and dynamics of ctDNA,showing that tumor volume is an important *** also found that when the tumor was completely resected,ctDNA was absent after one or more days.

关键词： Liquid biopsy Circulating tumor DNA Xenograft Esophageal squamous cell carcinoma Dynamics of circulating tumor DNA

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