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Updated: Feb 11, 2026

Mammalian Cell Division in 3D Matrices via Quantitative Confocal Reflection Microscopy
Published on: November 29, 2017
Src activation decouples cell division orientation from cell geometry in mammalian cells
Xiaoyan Sun1, Hongsheng Qi2, Xiuzhen Zhang3
1Institute for Regenerative Cures, University of California, Davis, CA, USA; Department of Dermatology, University of California, Davis, CA, USA; Department of Ophthalmology, University of California, Davis, CA, USA; Wound Healing and Cell Biology Laboratory, Institute of Basic Medical Science, Trauma Center of Postgraduate Medical School, Chinese PLA General Hospital, 28 Fu Xing Road, Beijing 100853, P.R. China.
Src (proto-oncogene tyrosine-protein kinase) regulates cell division orientation in mammalian cells. Inhibiting Src maintains correct cell division alignment, while its activation leads to misorientation, a hallmark of cancer.
Area of Science:
- Cell Biology
- Molecular Biology
- Cancer Research
Background:
- Cell division plane orientation is vital for development and regeneration.
- Misoriented cell division is linked to diseases like cancer.
- Src kinase regulates division orientation in model organisms, but its role in mammals is unclear.
Purpose of the Study:
- To investigate the role of Src in controlling cell division orientation in mammalian cells.
- To understand how Src influences mitotic spindle alignment.
- To explore Src's contribution to cancer-related cell division defects.
Main Methods:
- Utilized genetic (knockout) and pharmacological inhibition of Src.
- Employed extracellular signals to orient cell division.
- Analyzed cell division patterns in human cancer tissues and used mathematical modeling.
Main Results:
- Src inhibition maintained correct cell division orientation relative to mother cell axis.
- Src re-expression decoupled division orientation from mother cell geometry.
- Src activation correlated with mitotic spindle misorientation in human cancers.
- Src regulated adhesion protein dynamics at cell-matrix attachment sites.
Conclusions:
- Src plays a critical role in mammalian cell division orientation.
- Src activation contributes to mitotic spindle misorientation, potentially driving cancer progression.
- Src influences division orientation by modulating cell-matrix adhesion and geometry sensing.
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