PUBLICATION
Defining the ultrastructure of the hematopoietic stem cell niche by correlative light and electron microscopy
- Authors
- Agarwala, S., Kim, K.Y., Phan, S., Ju, S., Kong, Y.E., Castillon, G.A., Bushong, E.A., Ellisman, M.H., Tamplin, O.J.
- ID
- ZDB-PUB-220810-4
- Date
- 2022
- Source
- eLIFE 11: (Journal)
- Registered Authors
- Tamplin, Owen
- Keywords
- developmental biology, regenerative medicine, stem cells, zebrafish
- MeSH Terms
-
- Hematopoietic Stem Cells/metabolism
- Animals
- Stem Cell Niche*
- Microscopy, Electron
- Zebrafish*
- PubMed
- 35943143 Full text @ Elife
Citation
Agarwala, S., Kim, K.Y., Phan, S., Ju, S., Kong, Y.E., Castillon, G.A., Bushong, E.A., Ellisman, M.H., Tamplin, O.J. (2022) Defining the ultrastructure of the hematopoietic stem cell niche by correlative light and electron microscopy. eLIFE. 11:.
Abstract
The blood system is supported by hematopoietic stem and progenitor cells (HSPCs) found in a specialized microenvironment called the niche. Many different niche cell types support HSPCs, however how they interact and their ultrastructure has been difficult to define. Here we show that single endogenous HSPCs can be tracked by light microscopy, then identified by serial block-face scanning electron microscopy (SBEM) at multiscale levels. Using the zebrafish larval kidney marrow (KM) niche as a model, we followed single fluorescently-labeled HSPCs by light sheet microscopy, then confirmed their exact location in a 3D SBEM dataset. We found a variety of different configurations of HSPCs and surrounding niche cells, suggesting there could be functional heterogeneity in sites of HSPC lodgement. Our approach also allowed us to identify dopamine beta-hydroxylase (dbh) positive ganglion cells as a previously uncharacterized functional cell type in the HSPC niche. By integrating multiple imaging modalities, we could resolve the ultrastructure of single rare cells deep in live tissue and define all contacts between an HSPC and its surrounding niche cell types.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping