Genetic pathways regulating hematopoietic lineage speciation: Factorial latent variable model analysis of single cell...

Area of Science:

• * Developmental Biology
• * Computational Biology
• * Genetics

Background:

• * Genetic regulation of hematopoietic lineage commitment is not fully understood.
• * Variability in cellular speciation during hematopoiesis requires further investigation.

Purpose of the Study:

• * To delineate genetic sources of variability in steady-state hematopoiesis.
• * To identify dynamic biological factors regulating cell fate during blood development.

Main Methods:

• * Applied a factorial single-cell latent variable model (f-scLVM) to single-cell RNA sequencing data.
• * Analyzed transcriptomic data from 1,920 hematopoietic stem and progenitor cells (HSPCs) in 12-week-old female mice.
• * Decomposed cellular heterogeneity into interpretable biological factors.

Main Results:

• * Identified top biological factors underlying basal hematopoiesis in aggregate and lineage-restricted progenitor cells.
• * Discovered novel subpopulations and potential marker genes.
• * Experimental verification of a subset of factors in a companion study.

Conclusions:

• * The f-scLVM effectively decomposes transcriptomic heterogeneity in HSPCs.
• * The study provides a framework for discovering novel factors driving hematopoiesis.
• * Facilitates identification of hidden confounding factors in blood cell development.