Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Kowloon, China; State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Kowloon, China; Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Kowloon, China
State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Kowloon, China; Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Kowloon, China; Division of Life Science, The Hong Kong University of Science and Technology, Kowloon, China
State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Kowloon, China; Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Kowloon, China; Division of Life Science, The Hong Kong University of Science and Technology, Kowloon, China
Yi Wu
State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Kowloon, China; Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Kowloon, China; Division of Life Science, The Hong Kong University of Science and Technology, Kowloon, China
Xinwei Shen
Department of Mathematics, The Hong Kong University of Science and Technology, Kowloon, China
Kani Chen
Department of Mathematics, The Hong Kong University of Science and Technology, Kowloon, China
Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Kowloon, China; State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Kowloon, China; Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Kowloon, China
Qiqi Sun
Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Kowloon, China; State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Kowloon, China; Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Kowloon, China
Xuesong Li
Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Kowloon, China; State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Kowloon, China; Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Kowloon, China
Division of Cell, Developmental and Integrative Biology, School of Medicine, South China University of Technology, Guangzhou, China
Zilong Wen
State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Kowloon, China; Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Kowloon, China; Division of Life Science, The Hong Kong University of Science and Technology, Kowloon, China
Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Kowloon, China; State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Kowloon, China; Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Kowloon, China
Heterogeneity broadly exists in various cell types both during development and at homeostasis. Investigating heterogeneity is crucial for comprehensively understanding the complexity of ontogeny, dynamics, and function of specific cell types. Traditional bulk-labeling techniques are incompetent to dissect heterogeneity within cell population, while the new single-cell lineage tracing methodologies invented in the last decade can hardly achieve high-fidelity single-cell labeling and long-term in-vivo observation simultaneously. In this work, we developed a high-precision infrared laser-evoked gene operator heat-shock system, which uses laser-induced CreERT2 combined with loxP-DsRedx-loxP-GFP reporter to achieve precise single-cell labeling and tracing. In vivo study indicated that this system can precisely label single cell in brain, muscle and hematopoietic system in zebrafish embryo. Using this system, we traced the hematopoietic potential of hemogenic endothelium (HE) in the posterior blood island (PBI) of zebrafish embryo and found that HEs in the PBI are heterogeneous, which contains at least myeloid unipotent and myeloid-lymphoid bipotent subtypes.
