Related Experiment Videos
Cellular proliferation and telomerase activity in CHRF-288-11 cells
X Y Yang1, M Kimura, E Jeanclos
1Hypertension Research Center, University of Medicine & Dentistry of New Jersey, Newark 07103-2714, USA.
Life Sciences
|May 4, 2000
Summary
Telomerase activity in CHRF-288-11 cells reflects proliferation, not differentiation. Treatments inhibiting cell proliferation also reduced telomerase, which resumed upon restoring growth conditions.
Area of Science:
- Cell Biology
- Molecular Biology
- Genetics
Background:
- Telomerase is active in immortalized cell lines.
- Terminal differentiation may reduce telomerase activity.
- The link between differentiation, proliferation, and telomerase is unclear.
Purpose of the Study:
- To investigate whether telomerase activity reduction is due to terminal differentiation or proliferation cessation.
- To determine the relationship between telomerase activity and cellular proliferation status.
Main Methods:
- CHRF-288-11 megakaryocytic cell line used.
- Cells treated with phorbol 12-myristate 13-acetate (PMA), EGTA, serum depletion, and okadaic acid to induce differentiation and/or inhibit proliferation.
- Telomerase activity and proliferation were monitored.
Main Results:
- All treatments halted proliferation.
- PMA, EGTA, and serum depletion inhibited telomerase activity within 7 days.
- Reversing treatments restored telomerase activity and accelerated proliferation.
- Telomerase inhibition followed proliferation cessation; activity increased before proliferation resumed.
Conclusions:
- Telomerase activity in CHRF-288-11 cells correlates with proliferative status.
- The findings suggest telomerase activity is a marker for cell proliferation rather than differentiation.