Open AccessHigh-performance detection of somatic D-loop mutation in urothelial cell carcinoma patients by polymorphism ratio sequencing
Author(s) -
David P. Duberow,
Mariana Brait,
Mohammad O. Hoque,
Dan Theodorescu,
David Sidransky,
Santanu Dasgupta,
Richard A. Mathies
Publication year - 2016
Publication title -
journal of molecular medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.708
H-Index - 139
eISSN - 1432-1440
pISSN - 0946-2716
DOI - 10.1007/s00109-016-1407-2
Subject(s) - heteroplasmy , somatic cell , biology , mitochondrial dna , germline mutation , genetics , germline , microbiology and biotechnology , mutation , gene
Utilizing a polymorphism ratio sequencing platform, we performed a complete somatic mutation analysis of the mitochondrial D-loop region in 14 urothelial cell carcinomas. A total of 28 somatic mutations, all heteroplasmic, were detected in 8 of 14 individuals (57.1 %). Insertion/deletion changes in unstable mono- and dinucleotide repeat segments comprise the most pervasive class of mutations (9 of 28), while two recurring single-base substitution loci were identified. Seven variants, mostly insertion/deletions, represent population shifts from a heteroplasmic germline toward dominance in the tumor. In four cases, DNA from matched urine samples was similarly analyzed, with all somatic variants present in associated tumors readily detectable in the bodily fluid. Consistent with previous findings, mutant populations in urine were similar to those detected in tumor and in three of four cases were more prominent in urine.