Integrated Single-Cell Analysis Maps the Continuous Regulatory Landscape of Human Hematopoietic Differentiation

Cell. 2018 May 31;173(6):1535-1548.e16. doi: 10.1016/j.cell.2018.03.074. Epub 2018 Apr 26.

Abstract

Human hematopoiesis involves cellular differentiation of multipotent cells into progressively more lineage-restricted states. While the chromatin accessibility landscape of this process has been explored in defined populations, single-cell regulatory variation has been hidden by ensemble averaging. We collected single-cell chromatin accessibility profiles across 10 populations of immunophenotypically defined human hematopoietic cell types and constructed a chromatin accessibility landscape of human hematopoiesis to characterize differentiation trajectories. We find variation consistent with lineage bias toward different developmental branches in multipotent cell types. We observe heterogeneity within common myeloid progenitors (CMPs) and granulocyte-macrophage progenitors (GMPs) and develop a strategy to partition GMPs along their differentiation trajectory. Furthermore, we integrated single-cell RNA sequencing (scRNA-seq) data to associate transcription factors to chromatin accessibility changes and regulatory elements to target genes through correlations of expression and regulatory element accessibility. Overall, this work provides a framework for integrative exploration of complex regulatory dynamics in a primary human tissue at single-cell resolution.

Keywords: chromatin accessibility; epigenomics; hematopoiesis; single cell.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cell Differentiation
  • Cell Lineage
  • Chromatin / chemistry*
  • Epigenesis, Genetic
  • Epigenomics
  • Gene Expression Regulation*
  • Hematopoiesis
  • Hematopoietic Stem Cell Transplantation
  • Hematopoietic Stem Cells / cytology*
  • Humans
  • Myeloid Progenitor Cells / cytology
  • Principal Component Analysis
  • Regulatory Sequences, Nucleic Acid
  • Sequence Analysis, RNA
  • Single-Cell Analysis*
  • Transcription Factors / metabolism*
  • Transcriptome

Substances

  • Chromatin
  • Transcription Factors