TY - JOUR
T1 - Tissue-specific mutation accumulation in human adult stem cells during life
AU - Blokzijl, Francis
AU - de Ligt, Joep
AU - Jager, Myrthe
AU - Sasselli, Valentina
AU - Roerink, Sophie
AU - Sasaki, Nobuo
AU - Huch, Meritxell
AU - Boymans, Sander
AU - Kuijk, Ewart
AU - Prins, Pjotr
AU - Nijman, Isaac J
AU - Martincorena, Inigo
AU - Mokry, Michal
AU - Wiegerinck, Caroline L
AU - Middendorp, Sabine
AU - Sato, Toshiro
AU - Schwank, Gerald
AU - Nieuwenhuis, Edward E S
AU - Verstegen, Monique M A
AU - van der Laan, Luc J W
AU - de Jonge, Jeroen
AU - IJzermans, Jan N M
AU - Vries, Robert G
AU - van de Wetering, Marc
AU - Stratton, Michael R
AU - Clevers, Hans
AU - Cuppen, Edwin
AU - van Boxtel, Ruben
PY - 2016/10/13
Y1 - 2016/10/13
N2 - The gradual accumulation of genetic mutations in human adult stem cells (ASCs) during life is associated with various age-related diseases, including cancer. Extreme variation in cancer risk across tissues was recently proposed to depend on the lifetime number of ASC divisions, owing to unavoidable random mutations that arise during DNA replication. However, the rates and patterns of mutations in normal ASCs remain unknown. Here we determine genome-wide mutation patterns in ASCs of the small intestine, colon and liver of human donors with ages ranging from 3 to 87 years by sequencing clonal organoid cultures derived from primary multipotent cells. Our results show that mutations accumulate steadily over time in all of the assessed tissue types, at a rate of approximately 40 novel mutations per year, despite the large variation in cancer incidence among these tissues. Liver ASCs, however, have different mutation spectra compared to those of the colon and small intestine. Mutational signature analysis reveals that this difference can be attributed to spontaneous deamination of methylated cytosine residues in the colon and small intestine, probably reflecting their high ASC division rate. In liver, a signature with an as-yet-unknown underlying mechanism is predominant. Mutation spectra of driver genes in cancer show high similarity to the tissue-specific ASC mutation spectra, suggesting that intrinsic mutational processes in ASCs can initiate tumorigenesis. Notably, the inter-individual variation in mutation rate and spectra are low, suggesting tissue-specific activity of common mutational processes throughout life.
AB - The gradual accumulation of genetic mutations in human adult stem cells (ASCs) during life is associated with various age-related diseases, including cancer. Extreme variation in cancer risk across tissues was recently proposed to depend on the lifetime number of ASC divisions, owing to unavoidable random mutations that arise during DNA replication. However, the rates and patterns of mutations in normal ASCs remain unknown. Here we determine genome-wide mutation patterns in ASCs of the small intestine, colon and liver of human donors with ages ranging from 3 to 87 years by sequencing clonal organoid cultures derived from primary multipotent cells. Our results show that mutations accumulate steadily over time in all of the assessed tissue types, at a rate of approximately 40 novel mutations per year, despite the large variation in cancer incidence among these tissues. Liver ASCs, however, have different mutation spectra compared to those of the colon and small intestine. Mutational signature analysis reveals that this difference can be attributed to spontaneous deamination of methylated cytosine residues in the colon and small intestine, probably reflecting their high ASC division rate. In liver, a signature with an as-yet-unknown underlying mechanism is predominant. Mutation spectra of driver genes in cancer show high similarity to the tissue-specific ASC mutation spectra, suggesting that intrinsic mutational processes in ASCs can initiate tumorigenesis. Notably, the inter-individual variation in mutation rate and spectra are low, suggesting tissue-specific activity of common mutational processes throughout life.
U2 - 10.1038/nature19768
DO - 10.1038/nature19768
M3 - Article
C2 - 27698416
SN - 0028-0836
VL - 538
SP - 260
EP - 264
JO - Nature
JF - Nature
IS - 7624
ER -