Key result
Myosin 1e deficiency in 4T1 breast cancer cells resulted in altered morphology, slower rates of migration, and lower rates of focal adhesion disassembly compared to wild-type cells.
Why the study?
Breast cancer metastasis causes most breast cancer deaths, and prior work showed myosin 1e deficiency prevented lung metastases in mice, prompting investigation into how myosin 1e absence affects cell migration and invasion in vitro.
Does myosin 1e deficiency reduce cell migration and invasion in 4T1 breast cancer cells?
Does myosin 1e deficiency reduce cell migration and invasion in 4T1 breast cancer cells?
Myosin 1e deficiency impairs the migration of highly invasive 4T1 breast cancer cells, potentially by reducing focal adhesion disassembly.
Answers are grounded in this paper and cite their sources.
Should not yet alter clinical management; hypothesis-generating for myosin 1e as antimetastatic target.
Metastasis of breast cancer cells to distant tissue sites is responsible for the majority of deaths associated with breast cancer. Previously we have examined the role of class I myosin motor protein, myosin 1e (myo1e), in cancer metastasis using the Mouse Mammary Tumor Virus-Polyoma Middle T Antigen (MMTV-PyMT) mouse model. Mice deficient in myo1e formed tumors with a more differentiated phenotype relative to the wild-type mice and formed no detectable lung metastases. In the current study, we investigated how the absence of myo1e affects cell migration and invasion in vitro, using the highly invasive and migratory breast cancer cell line, 4T1. 4T1 cells deficient in myo1e exhibited an altered morphology and slower rates of migration in the wound-healing and transwell migration assays compared to the WT 4T1 cells. While integrin trafficking and Golgi reorientation did not appear to be altered upon myo1e loss, we observed lower rates of focal adhesion disassembly in myo1e-deficient cells, which could help explain the cell migration defect.
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Garone et al. (2023) studied Breast cancer. Myosin 1e (myo1e) deficiency vs. Wild-type (WT) 4T1 cells was evaluated on Cell migration and invasion in vitro. Myosin 1e deficiency in 4T1 breast cancer cells resulted in altered morphology, slower rates of migration, and lower rates of focal adhesion disassembly compared to wild-type cells.
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