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Elucidating the Functional Mechanism of PTK7 in Cancer Development through Spatial Assembly Analysis Using Super
Luqi Qiu1, Haijiao Xu2, Binglin Sui1
1School of Chemistry & Chemical Engineering, Wuhan University of Science and Technology, 947 Heping Street, Wuhan, Hubei 430081, China.
Abstract:
Protein tyrosine kinase-7 (PTK7) has been reported as a vital participant in the Wnt signaling pathway, influencing tumorigenesis and metastasis. However, their specific roles in the mechanisms underlying cancer development and progression remain elusive. Here, using direct stochastic optical reconstruction microscopy (dSTORM) with aptamer-probe labeling, we first revealed that a weakening clustering distribution of PTK7 on the basal membranes happened as cellular migration increased during cancer progression. This correspondence was further supported by a diminished aggregated state of PTK7 caused by direct enhancement of cell migration. By comparing the alterations in PTK7 distribution with activation or inhibition of specific Wnt signaling pathway, we speculated that PTK7 could modulate cell migration by participating in the interplay between canonical Wnt (in MCF7 cells) and noncanonical Wnt signals (in MDA-MB-231 cells). Furthermore, we discovered that the spatial distribution morphology of PTK7 was also subject to the hydrolysis ability and activation state of the related hydrolase Matrix metallopeptidase14 (MMP14). This function-related specific assembly of PTK7 reveals a clear relationship between PTK7 and cancer. Meanwhile, potential molecular interactions predicted by the apparent assembly morphology can promote a deep understanding of the functional mechanism of PTK7 in cancer progress.
Insights
Protein tyrosine kinase-7 (PTK7) clustering weakens with increased cell migration during cancer progression. PTK7 assembly is influenced by Wnt signaling and MMP14, impacting cancer development.
Area of Science:
- Cell Biology
- Molecular Oncology
- Biophysics
Background:
- Protein tyrosine kinase-7 (PTK7) is implicated in Wnt signaling, a pathway crucial for tumorigenesis and metastasis.
- The precise mechanisms by which PTK7 contributes to cancer development and progression are not fully understood.
Purpose of the Study:
- To investigate the relationship between PTK7 distribution, cellular migration, and Wnt signaling in cancer progression.
- To explore the role of Matrix metallopeptidase14 (MMP14) in modulating PTK7 assembly and function.
Main Methods:
- Direct stochastic optical reconstruction microscopy (dSTORM) with aptamer-probe labeling was employed to visualize PTK7 distribution.
- PTK7 clustering was analyzed in relation to cellular migration and Wnt signaling pathway modulation (canonical and noncanonical).
- The influence of Matrix metallopeptidase14 (MMP14) activity on PTK7 spatial distribution was examined.
Main Results:
- A decrease in PTK7 clustering on basal membranes correlated with increased cellular migration during cancer progression.
- Enhanced cell migration led to a diminished aggregated state of PTK7.
- PTK7 distribution was found to be dependent on the hydrolysis ability and activation state of MMP14.
- PTK7 may modulate cell migration through interactions within canonical and noncanonical Wnt signaling pathways.
Conclusions:
- PTK7's altered spatial distribution, particularly its weakened clustering with increased migration, highlights its role in cancer progression.
- The interplay between PTK7, Wnt signaling, and MMP14 offers insights into cancer mechanisms.
- Understanding PTK7 assembly provides a foundation for further research into its functional mechanisms in cancer.
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