Morphometric analysis of B2cAMP induced reverse transformation in synchronized CHO cells

Area of Science:

• Cell Biology
• Biophysics
• Morphology

Background:

• Chinese Hamster Ovary (CHO-K1) cells are a common model for cell biology studies.
• Cell transformation and its reversal impact cellular morphology and behavior.
• Understanding cell cycle-dependent morphological changes is crucial for various biological processes.

Purpose of the Study:

• To characterize geometric and densitometric parameters of synchronized CHO-K1 cells during transformation reversal.
• To investigate the effects of B2cAMP on cell and nuclear morphology.
• To explore cell-cycle-dependent modulations in cellular parameters.

Main Methods:

• Synchronized CHO-K1 cells were treated with B2cAMP to induce reverse transformation.
• Cells were analyzed using geometric and densitometric measurements (form factor, average optical density).
• Triple staining (Feulgen, Napthol Yellow S, PAS) was used to assess polysaccharides, protein, and DNA content.

Main Results:

• B2cAMP treatment induced a shift from polygonal to spindle-shaped morphology.
• A significant decrease in form factor and average optical density was observed in treated cells and nuclei.
• Cell cycle duration was lengthened, with parallel cell-cycle-dependent modulations in geometric and densitometric parameters.

Conclusions:

• Reversal of cell transformation by B2cAMP leads to distinct morphological and densitometric changes.
• These changes are cell-cycle-dependent and affect both cytoplasmic and nuclear parameters.
• The study highlights the potential for objective morphological classification of in vitro cell lines.