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Updated: Aug 9, 2026
12:19
Analysis of Cell Cycle Position in Mammalian Cells
Published on: January 21, 2012
RB1CC1 suppresses cell cycle progression through RB1 expression in human neoplastic cells
Keiichi Kontani1, Tokuhiro Chano, Yoshitomo Ozaki
1Department of Surgery, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan.
International Journal of Molecular Medicine
|October 9, 2003
Summary
RB1-inducible Coiled-Coil 1 (RB1CC1) regulates retinoblastoma 1 (RB1) expression, particularly underphosphorylated forms. This finding suggests RB1CC1 suppresses cell cycle progression in neoplastic cells, impacting cancer development.
Area of Science:
- Molecular Biology
- Cancer Research
- Cell Biology
Background:
- RB1-inducible Coiled-Coil 1 (RB1CC1) is a key regulator of retinoblastoma 1 (RB1).
- Mutations in RB1CC1 are linked to breast cancer tumorigenesis.
- RB1CC1's role in cell growth and various cancer progressions is under investigation.
Purpose of the Study:
- To examine the correlation between RB1CC1 and cell cycle molecules in human neoplastic cells.
- To verify the impact of RB1CC1 on cell cycle phases in human leukemic cell lines.
Main Methods:
- RB1CC1 transduction in K562 and Jurkat cell lines.
- Western blotting to detect protein expression (RB1, E2F1).
- Cell cycle analysis to quantify cell distribution in different phases.
Main Results:
- RB1CC1 expression was synchronous with RB1 in various cell lines.
- RB1CC1 introduction induced RB1 expression, specifically underphosphorylated forms, in leukemic cells.
- RB1CC1 transduction suppressed G2-M phase progression.
Conclusions:
- RB1CC1 induces RB1 expression, favoring underphosphorylated forms.
- RB1CC1 suppresses cell cycle progression in human neoplastic cells.
- RB1CC1 plays a significant role in regulating cell cycle and potentially cancer development.
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