Junctional modulation in mouse embryonal carcinoma cells by Fab fragments of rabbit anti-embryonal carcinoma cell serum
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Updated: Aug 8, 2026
Lectin-based Isolation and Culture of Mouse Embryonic Motoneurons
Published on: September 15, 2011
Abstract:
Mouse embryonal carcinoma PCC4 cells are connected by extensive gap and tight junctions. When the cells are incubated in a medium containing Fab fragments against embryonal carcinoma F9 cells, they round up and a process of junctional removal is initiated. In particular, gap junctions are internalized and after 30 hr of incubation with the anti-F9 Fab fragments both tight and gap junctions are no longer present at the cell surface; however, the cells are still in contact by means of small attachment sites.
Insights
Mouse embryonal carcinoma cells lose their extensive gap and tight junctions when treated with anti-F9 Fab fragments. This junctional removal leads to cell rounding, revealing the dynamic nature of cell-cell adhesion.
Area of Science:
- Cell Biology
- Developmental Biology
- Biochemistry
Background:
- Mouse embryonal carcinoma PCC4 cells exhibit extensive gap and tight junctions, crucial for cell-cell communication and tissue integrity.
- Understanding the regulation and dynamics of these junctions is vital for comprehending early development and cellular organization.
Purpose of the Study:
- To investigate the effect of specific antibody fragments on the junctional complexes of PCC4 cells.
- To elucidate the process and timeline of junctional removal induced by anti-embryonal carcinoma F9 cell Fab fragments.
Main Methods:
- Incubation of PCC4 cells with Fab fragments targeting embryonal carcinoma F9 cells.
- Microscopic observation and analysis of cell morphology and junctional complex integrity over time.
Main Results:
- Treatment with anti-F9 Fab fragments induced cell rounding in PCC4 cells.
- A progressive removal of both gap and tight junctions from the cell surface was observed.
- After 30 hours, cell surface junctions were absent, though cells maintained contact via smaller attachment sites.
Conclusions:
- Specific antibody-mediated targeting can trigger rapid and extensive junctional disassembly in embryonal carcinoma cells.
- The study demonstrates the dynamic nature of gap and tight junctions and their susceptibility to external stimuli.
- PCC4 cells can maintain cell-cell contact even after complete loss of classical junctional structures.
