Aggressive prostate cancer cell nuclei have reduced stiffness
Zeina S Khan1, Julianna M Santos1, Fazle Hussain1
1Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409, USA.
Biomicrofluidics
|January 16, 2018
Summary
Highly metastatic prostate cancer cells possess softer nuclei, enabling faster movement through confined spaces. This nuclear softness can serve as a potential marker for aggressive cancers.
Area of Science:
- Biophysics
- Cancer Biology
- Cell Mechanics
Background:
- Metastatic cancer cells are hypothesized to have softer nuclei.
- This characteristic may facilitate their faster transit through restrictive environments.
- The mechanical properties of cancer cell nuclei are crucial for understanding metastasis.
Purpose of the Study:
- To investigate the hypothesis that highly metastatic prostate cancer cells have softer nuclei.
- To determine if nuclear stiffness can be utilized as a malignancy marker.
- To explore the relationship between nuclear stiffness, lamin A/C expression, and chromatin condensation in prostate cancer cells.
Main Methods:
- Utilized nuclear creep experiments within a microfluidic channel featuring a narrow constriction.
- Compared the stiffness of nuclei from aggressive immortalized prostate cancer cells with those from immortalized normal cells.
- Assessed the correlation between nuclear stiffness, lamin A/C protein levels, and chromatin condensation.
Main Results:
- Aggressive prostate cancer cell nuclei exhibited significantly lower stiffness compared to normal cell nuclei.
- Nuclear stiffness was highest in cells with high lamin A/C expression and lowest in cells with low lamin A/C expression.
- Softer nuclei were associated with decreased chromatin condensation.
Conclusions:
- Reduced nuclear stiffness is a characteristic of aggressive prostate cancer cells.
- Nuclear stiffness can potentially serve as a convenient marker for malignancy.
- Lamin A/C levels and chromatin condensation in nuclei may also indicate cancer aggressiveness.
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