High Resolution Cell Lineage Tracing Reveals Developmental Variability in Leech
Overview
Affiliations
Knowing the normal patterns of embryonic cell proliferation, migration, and differentiation is a cornerstone for understanding development. Yet for most species, the precision with which embryonic cell lineages can be determined is limited by technical considerations (the large numbers of cells, extended developmental times, opacity of the embryos), and these are exacerbated by the inherent variability of the lineages themselves. Here, we present an improved method of cell lineage tracing in the leech Helobdella, driving the expression of a nuclearly localized histone H2B:GFP (green fluorescent protein) fusion protein in selected lineages by microinjection of a plasmid vector. This construct generates a long lasting and minimally mosaic signal with single cell resolution, and does not disrupt the development of most lineages tested. We have validated this technique by elucidating details of cell lineages contributing to segmental and prostomial tissues that could not be observed with standard dextran lineage tracers.
Transgenesis enables mapping of segmental ganglia in the leech Helobdella austinensis.
Kuo D, Szczupak L, Weisblat D, Portiansky E, Winchell C, Lee J J Exp Biol. 2024; 227(14).
PMID: 38940760 PMC: 11418187. DOI: 10.1242/jeb.247419.
Pax3/7 regulates neural tube closure and patterning in a non-vertebrate chordate.
Kim K, Orvis J, Stolfi A Front Cell Dev Biol. 2022; 10:999511.
PMID: 36172287 PMC: 9511217. DOI: 10.3389/fcell.2022.999511.
Popsuj S, Stolfi A Front Neurosci. 2022; 15:784649.
PMID: 34975385 PMC: 8719597. DOI: 10.3389/fnins.2021.784649.
Effector gene expression underlying neuron subtype-specific traits in the Motor Ganglion of Ciona.
Gibboney S, Orvis J, Kim K, Johnson C, Martinez-Feduchi P, Lowe E Dev Biol. 2019; 458(1):52-63.
PMID: 31639337 PMC: 6987015. DOI: 10.1016/j.ydbio.2019.10.012.
Maps of variability in cell lineage trees.
Hicks D, Speed T, Yassin M, Russell S PLoS Comput Biol. 2019; 15(2):e1006745.
PMID: 30753182 PMC: 6388934. DOI: 10.1371/journal.pcbi.1006745.