{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T20:08:26Z","timestamp":1792267706438,"version":"4.4.0"},"reference-count":57,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2022,12,29]],"date-time":"2022-12-29T00:00:00Z","timestamp":1672272000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["febs.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Molecular Oncology"],"published-print":{"date-parts":[[2023,5]]},"abstract":"<jats:p>Brain metastasis (BM) genetically diverges from the primary tumor in non\u2010small\u2010cell lung cancer (NSCLC). Hence, accurately capturing clinically relevant alterations is pivotal for the delivery of targeted therapies. Circulating tumor DNA (ctDNA) sequencing has emerged as a promising liquid biopsy in the biomarker\u2010based clinical management of recurrent and extracranial metastatic NSCLC. However, the absence of simultaneous sequencing data from brain metastatic sites prevents the definitive evaluation of the efficacy of ctDNA in representing genetic profiles in BM. Here, we performed parallel genomic comparisons between matched BM and primary tumor DNA, plasma ctDNA, and cerebrospinal fluid (CSF) ctDNA. The results indicated that CSF ctDNA had a greater ability than plasma ctDNA to comprehensively represent the mutational landscape of BM, with CSF ctDNA detecting all BM mutations in 83.33% of patients, while plasma ctDNA was only 27.78%. Mutant allele frequency (MAF) in CSF ctDNA was highly correlated with the tumor size of BM (<jats:italic>r<\/jats:italic>\u00a0=\u20090.95), and the mean MAF in CSF ctDNA was higher than that in plasma ctDNA (38.05% vs. 4.57%, respectively). MAF and tumor mutational burden in CSF ctDNA were strongly associated with those in BM (<jats:italic>r<\/jats:italic>\u00a0=\u20090.96 and 0.97, respectively). Of note, CSF ctDNA had significantly higher concordance with BM than plasma ctDNA (99.33% vs. 67.44%), facilitating the identification of clinically relevant mutations. Moreover, we found that plasma ctDNA has stronger profiling performance, with a concordance of 93.01% in multiple brain metastases, equivalent to CSF ctDNA. Collectively, our study indicates that CSF ctDNA is superior to plasma ctDNA in accurately representing the profiling of single BM. Plasma ctDNA could be an alternative liquid biopsy material to be applied in multiple brain metastatic NSCLC.<\/jats:p>","DOI":"10.1002\/1878-0261.13357","type":"journal-article","created":{"date-parts":[[2022,12,10]],"date-time":"2022-12-10T11:03:51Z","timestamp":1670670231000},"page":"810-824","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":51,"title":["Cerebrospinal fluid circulating tumor <scp>DNA<\/scp> depicts profiling of brain metastasis in <scp>NSCLC<\/scp>"],"prefix":"10.1002","volume":"17","author":[{"given":"Jun","family":"Wu","sequence":"first","affiliation":[{"name":"Department of Neurosurgery Xiangya Hospital, Central South University  Changsha China"},{"name":"National Clinical Research Center for Geriatric Disorders Xiangya Hospital, Central South University  Changsha 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