The DOI matches its Crossref record; 7 of the 7 references it cites were found in a registry or an index.
Telomerase activity in normal leukocytes and in hematologic malignancies
Abstract
Telomeres are essential for function and stability of eukaryotic chromosomes. In the absence of telomerase, the enzyme that synthesizes telomeric DNA, telomeres shorten with cell division, a process thought to contribute to cell senescence and the proliferative crisis of transformed cells. We reported telomere stabilization concomitant with detection of telomerase activity in cells immortalized in vitro and in ovarian carcinoma cells, and suggested that telomerase is essential for unlimited cell proliferation. We have now examined the temporal pattern of telomerase expression in selected hematologic malignancies. We found that, unlike other somatic tissues, peripheral, cord blood, and bone marrow leukocytes from normal donors expressed low levels of telomerase activity. In leukocytes from chronic lymphocytic leukemia (CLL) patients, activity was lower than in controls in early disease, and comparable with controls in late disease. Relative to bone marrow, telomerase activity was enhanced in myelodysplastic syndrome (MDS) and more significantly so in acute myeloid leukemia (AML). Regardless of telomerase levels, telomeres shortened with progression of the diseases. Our results suggest that early CLL and MDS cells lack an efficient mechanism of telomere maintenance and that telomerase is activated late in the progression of these cancers, presumably when critical telomere loss generates selective pressure for cell immortality.
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“Telomerase is primarily active in proliferating cells, hematopoietic stem cells, and rapidly renewing cells [114,115,116].”
From Cell Immortality: In Vitro Effective Techniques to Achieve and Investigate Its Applications and Challenges (2024) · cites this paper as [114]
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Citations
Cites
Specific Association of Human Telomerase Activity with Immortal Cells and Cancer
Kim, N. W., Piatyszek, M. A., Prowse, K. R., Harley, C. B., West, M. D., Ho, P. L. C., Coviello, G. M., Wright, W. E., Weinrich, S. L., & Shay, J. W. (1994) · Science · doi:10.1126/science.7605428 · Cited by 7,091
Self-citationCounter, C. M., Avilion, A. A., LeFeuvre, C. E., Stewart, N. G., Greider, C. W., Harley, C. B., & Bacchetti, S. (1992) · The EMBO Journal · doi:10.1002/j.1460-2075.1992.tb05245.x · Cited by 2,096
Self-citationWATSON, J. D. (1972) · Nature New Biology · doi:10.1038/newbio239197a0 · Cited by 1,632
Evidence for a mitotic clock in human hematopoietic stem cells: loss of telomeric DNA with age.
Vaziri, H., Dragowska, W., Allsopp, R. C., Thomas, T. E., Harley, C. B., & Lansdorp, P. M. (1994) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.91.21.9857 · Cited by 1,132
Self-citationTelomerase activity in human ovarian carcinoma.
Counter, C. M., Hirte, H. W., Bacchetti, S., & Harley, C. B. (1994) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.91.8.2900 · Cited by 677
Self-citationIn vivo loss of telomeric repeats with age in humans
Lindsey, J., McGill, N. I., Lindsey, L. A., Green, D. K., & Cooke, H. J. (1991) · Mutation Research/DNAging · doi:10.1016/0921-8734(91)90032-7 · Cited by 463
Counter, C. M., Botelho, F. M., Wang, P., Harley, C. B., & Bacchetti, S. (1994) · Journal of Virology · doi:10.1128/jvi.68.5.3410-3414.1994 · Cited by 355
Self-citation
Research works printed but not linked: 2
- Bacchetti S, Counter CM: Telomerase: A key to cell immor- tality? The role of the enzyme in cell transformation and cancer. Cancer Invest I995 (in press) 1 1. Blackburn EH: Telomerases. Annu Rev Biochem 61: 113, 1992
- Mayer RJ, Canellos G P Primary myelodysplastic syndrome and secondary preleukemic disorders, in Henderson ES, Lister TA (eds): William Dameshek and Fredrick Gunz's Leukemia (ed 5). Toronto, Canada, Saunders, 1990, p 613
Cited by
A survey of telomerase activity in human cancer
Shay, J. W., & Bacchetti, S. (1997) · European Journal of Cancer · doi:10.1016/s0959-8049(97)00062-2 · Cited by 2,794
Self-citationMeyerson, M., Counter, C. M., Eaton, E. N., Ellisen, L. W., Steiner, P., Caddle, S. D., Ziaugra, L., Beijersbergen, R. L., Davidoff, M. J., Liu, Q., et al. (1997) · Cell · doi:10.1016/s0092-8674(00)80538-3 · Cited by 1,784
Self-citationTelomere elongation in immortal human cells without detectable telomerase activity
Bryan, T. M., Englezou, A., Gupta, J., Bacchetti, S., & Reddel, R. R. (1995) · The EMBO Journal · doi:10.1002/j.1460-2075.1995.tb00098.x · Cited by 1,279
Self-citationThe rate of telomere sequence loss in human leukocytes varies with age
Frenck, R. W., Blackburn, E. H., & Shannon, K. M. (1998) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.95.10.5607 · Cited by 675
Transcription Factors, Normal Myeloid Development, and Leukemia
Tenen, D. G., Hromas, R., Licht, J. D., & Zhang, D.-E. (1997) · Blood · doi:10.1182/blood.v90.2.489 · Cited by 735
Metadata
- Authors
- Counter, C., Gupta, J., Harley, C., Leber, B., & Bacchetti, S.
- Affiliations
- Department of Pathology, McMaster University, Hamilton, Ontario, Canada.
- Venue
- Blood
- Publisher
- American Society of Hematology
- Published
- 1995-05-01
- Volume
- 85
- Issue
- 9
- Pages
- 2315-2320
- ISSN
- 0006-4971
- 1528-0020
- Cited by
- 477
- References
- 7
- Language
- en
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