한빛사논문
Joonhee Choia,b,1, Hengyun Zhoua,1, Renate Landiga, Hai-Yin Wua, Xiaofei Yuc,d, Stephen E. Von Stetinae, Georg Kucskoa, Susan E. Mangoe , Daniel J. Needlemanb,e, Aravinthan D. T. Samuela,f , Peter C. Maurerd,2 , Hongkun Parka,g,2 , and Mikhail D. Lukina,2
aDepartment of Physics, Harvard University, Cambridge, MA 02138; bSchool of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138; cDepartment of Physics, The University of Chicago, Chicago, IL 60637; dPritzker School of Molecular Engineering, The University of Chicago, Chicago, IL 60637; eDepartment of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138; fCenter for Brain Science, Harvard University, Cambridge, MA 02138; and gDepartment of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138
1J.C. and H.Z. contributed equally to this work.y
2To whom correspondence may be addressed.
Abstract
Understanding the coordination of cell-division timing is one of the outstanding questions in the field of developmental biology. One active control parameter of the cell-cycle duration is temperature, as it can accelerate or decelerate the rate of biochemical reactions. However, controlled experiments at the cellular scale are challenging, due to the limited availability of biocompatible temperature sensors, as well as the lack of practical methods to systematically control local temperatures and cellular dynamics. Here, we demonstrate a method to probe and control the cell-division timing in Caenorhabditis elegans embryos using a combination of local laser heating and nanoscale thermometry. Local infrared laser illumination produces a temperature gradient across the embryo, which is precisely measured by in vivo nanoscale thermometry using quantum defects in nanodiamonds. These techniques enable selective, controlled acceleration of the cell divisions, even enabling an inversion of division order at the two-cell stage. Our data suggest that the cell-cycle timing asynchrony of the early embryonic development in C. elegans is determined independently by individual cells rather than via cell-to-cell communication. Our method can be used to control the development of multicellular organisms and to provide insights into the regulation of cell-division timings as a consequence of local perturbations.
quantum sensing, nanoscale thermometry, cell-division asymmetry, nitrogen-vacancy centers, cell-cycle control
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