title: Cell lineage reconstruction of early zebrafish embryos using label-free nonlinear microscopy.
abstract: Quantifying cell behaviors in animal early embryogenesis remains a challenging issue requiring in toto imaging and automated image analysis. We designed a framework for imaging and reconstructing unstained whole zebrafish embryos for their first 10 cell division cycles and report measurements along the cell lineage with micrometer spatial resolution and minute temporal accuracy. Point-scanning multiphoton excitation optimized to preferentially probe the innermost regions of the embryo provided intrinsic signals highlighting all mitotic spindles and cell boundaries. Automated image analysis revealed the phenomenology of cell proliferation. Blastomeres continuously drift out of synchrony. After the 32-cell stage, the cell cycle lengthens according to cell radial position, leading to apparent division waves. Progressive amplification of this process is the rule, contrasting with classical descriptions of abrupt changes in the system dynamics.
authors: Laboratory for Optics and Biosciences, Ecole Polytechnique, CNRS, INSERM, Palaiseau, France.
authors: Nicolas
authors: N
authors: Olivier
authors: Miguel A
authors: MA
authors: Luengo-Oroz
authors: Louise
authors: L
authors: Duloquin
authors: Emmanuel
authors: E
authors: Faure
authors: Thierry
authors: T
authors: Savy
authors: Israël
authors: I
authors: Veilleux
authors: Xavier
authors: X
authors: Solinas
authors: Delphine
authors: D
authors: Débarre
authors: Paul
authors: P
authors: Bourgine
authors: Andrés
authors: A
authors: Santos
authors: Nadine
authors: N
authors: Peyriéras
authors: Emmanuel
authors: E
authors: Beaurepaire
mesh_terms: D000818:Animals; D036703:Blastula / Q000166:cytology; D002453:Cell Cycle; D019070:Cell Lineage; D004625:Embryo, Nonmammalian / Q000166:cytology*; D007091:Image Processing, Computer-Assisted; D008853:Microscopy / Q000379:methods*; D015027:Zebrafish / Q000196:embryology*