What question did this study set out to answer?

To determine how transcriptional heterogeneity in hematopoietic stem cells (HSC) influences clonal fitness in aged environments.

Abstract LB498: Transcriptional heterogeneity in hematopoietic stem cells prospectively predicts clonal fitness in aged microenvironments

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To determine how transcriptional heterogeneity in hematopoietic stem cells (HSC) influences clonal fitness in aged environments.
Utilized CellTag Indexing and scRNA-seq for tracking mouse HSC sister clones.
Conducted heterochronic and homochronic transplantation experiments.
Quantified transcriptional heterogeneity pre- and post-transplant.
Applied predictive AI models with cross-validation to assess the link between transcriptional profiles and clonal fitness.
Increased transcriptomic heterogeneity in long-term HSC from aged donors was observed.
Sister clones from aged donors exhibited higher self-renewal in older recipients than in younger ones.
Clonal fitness was predicted from baseline transcriptional signatures with significant accuracy.
Identified genes linked to self-renewal and inflammation showed relevance to human acute myeloid leukemia survival.

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This longitudinal study links transcriptional signals to clonal fitness in aged hematopoietic stem cells, suggesting implications for leukemia risk.

Dominici et al. (2026) studied this question.

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This longitudinal study links transcriptional signals to clonal fitness in aged hematopoietic stem cells, suggesting implications for leukemia risk.