Early developmental asymmetries in cell lineage trees in living individuals.

Early developmental asymmetries in cell lineage trees in living individuals.
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DOI:
10.1126/science.abe0981
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发表时间:
2021-03-19
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Vaccarino FM
Vaccarino FM
中科院分区:
其他
文献类型:
--
作者:
Fasching L;Jang Y;Tomasi S;Schreiner J;Tomasini L;Brady MV;Bae T;Sarangi V;Vasmatzis N;Wang Y;Szekely A;Fernandez TV;Leckman JF;Abyzov A;Vaccarino FM

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Mosaic mutations can be used to track cell lineages in humans. We used cell cloning to analyze embryonic cell lineages in two living individuals and a postmortem human specimen. Of ten reconstructed post-zygotic divisions, none resulted in balanced contributions of daughter lineages to tissues. In both living individuals one of two lineages from the first cleavage was dominant across tissues, with 90% frequency in blood. We propose that the efficiency of DNA repair contributes to lineage imbalance. Allocation of lineages in postmortem brain correlated with anterior-posterior axis, associating lineage history with cell fate choices in embryos. We establish a minimally invasive framework for defining cell lineages in any living individual, which paves the way for studying their relevance in health and disease. The first cell division in humans produces cellular lineage trees with asymmetric fates.
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