Telomeres – the body’s biological clock
Aging is a complex process involving interconnected changes at the molecular, cellular, tissue, functional, and psychological levels. The reversibility of aging depends on multiple factors—one of the most significant being telomeres.
Telomeres are the protective end segments of chromosomes that maintain DNA integrity. They consist of repetitive nucleotide sequences linked together. Each human cell contains 92 telomeres (23 chromosome pairs × 2 chromatids × 2 telomeres each).
With every cell division, telomeres progressively shorten. Once they reach a critical shortening threshold, the cell can no longer function properly and either enters senescence or undergoes apoptosis. This mechanism explains the Hayflick limit—the finite replicative capacity of most human cells, typically around 52 divisions.
Telomeres are the protective end segments of chromosomes that maintain DNA integrity. They consist of repetitive nucleotide sequences linked together. Each human cell contains 92 telomeres (23 chromosome pairs × 2 chromatids × 2 telomeres each).
With every cell division, telomeres progressively shorten. Once they reach a critical shortening threshold, the cell can no longer function properly and either enters senescence or undergoes apoptosis. This mechanism explains the Hayflick limit—the finite replicative capacity of most human cells, typically around 52 divisions.
Aging is a complex process involving interconnected changes at the molecular, cellular, tissue, functional, and psychological levels. The reversibility of aging depends on multiple factors—one of the most significant being telomeres.
Telomeres are the protective end segments of chromosomes that maintain DNA integrity. They consist of repetitive nucleotide sequences linked together. Each human cell contains 92 telomeres (23 chromosome pairs × 2 chromatids × 2 telomeres each).
With every cell division, telomeres progressively shorten. Once they reach a critical shortening threshold, the cell can no longer function properly and either enters senescence or undergoes apoptosis. This mechanism explains the Hayflick limit—the finite replicative capacity of most human cells, typically around 52 divisions.
Telomeres are the protective end segments of chromosomes that maintain DNA integrity. They consist of repetitive nucleotide sequences linked together. Each human cell contains 92 telomeres (23 chromosome pairs × 2 chromatids × 2 telomeres each).
With every cell division, telomeres progressively shorten. Once they reach a critical shortening threshold, the cell can no longer function properly and either enters senescence or undergoes apoptosis. This mechanism explains the Hayflick limit—the finite replicative capacity of most human cells, typically around 52 divisions.
The enzyme telomerase is capable of maintaining telomere length. Using its built-in RNA template, telomerase adds repetitive DNA sequences to the shortened ends of chromosomes, thereby restoring telomere length and enabling the cell to continue dividing and functioning—effectively slowing cellular aging.
Telomerase activators help protect telomeres from oxidative stress and other damaging factors that accelerate their shortening and, consequently, lead to premature cellular senescence, tissue dysfunction, and age-related decline. By supporting telomerase activity, these compounds contribute to preserving genomic stability, enhancing cellular longevity, and promoting healthier aging at the molecular level.
Telomerase activators help protect telomeres from oxidative stress and other damaging factors that accelerate their shortening and, consequently, lead to premature cellular senescence, tissue dysfunction, and age-related decline. By supporting telomerase activity, these compounds contribute to preserving genomic stability, enhancing cellular longevity, and promoting healthier aging at the molecular level.
Information sources:
1.O’Donovan A., Pantell M. S., Puterman E., Dhabhar F. S., et al. Cumulative Inflammatory load is associated with short leukocyte telomere length in the health, aging, and body composition study. // PLoS one. 2011; 6(5): e19687.
2.Aviv A. Genetics of leukocyte telomere length and its role in atherosclerosis.// Murat Res.2011 May 8
3.Bayne S., Li H., Jones M. E., Pinto A. R., et al. Estrogen deficiency reversibly induces telomere shortening in mouse granulosa cells and ovarian aging in vivo. // Protein Cell. 2011 Apr; 2(4):333–346.
4.Aubert G., Lansdorp P. M. Telomeres and aging. // Physiol Rev. 2008 April; 88(2): 557–579.
5.Greider C. W. & Blackburn E. H. Identification of a specific telomere terminal transferase activity in Tetrahymena extracts. // Cell 43, 405–413 (1985).
6.Greider C. W. & Blackburn E. H. The telomere terminal transferase of Tetrahymena is a ribonucleoprotein enzyme with two kinds of primer specificity. // Cell 51, 887–898 (1987).
7.Greider C. W. & Blackburn E. H. A telomeric sequence in the RNA of Tetrahymena telomerase required for telomere repeats synthesis. // Nature 337, 331–337 (1989).
1.O’Donovan A., Pantell M. S., Puterman E., Dhabhar F. S., et al. Cumulative Inflammatory load is associated with short leukocyte telomere length in the health, aging, and body composition study. // PLoS one. 2011; 6(5): e19687.
2.Aviv A. Genetics of leukocyte telomere length and its role in atherosclerosis.// Murat Res.2011 May 8
3.Bayne S., Li H., Jones M. E., Pinto A. R., et al. Estrogen deficiency reversibly induces telomere shortening in mouse granulosa cells and ovarian aging in vivo. // Protein Cell. 2011 Apr; 2(4):333–346.
4.Aubert G., Lansdorp P. M. Telomeres and aging. // Physiol Rev. 2008 April; 88(2): 557–579.
5.Greider C. W. & Blackburn E. H. Identification of a specific telomere terminal transferase activity in Tetrahymena extracts. // Cell 43, 405–413 (1985).
6.Greider C. W. & Blackburn E. H. The telomere terminal transferase of Tetrahymena is a ribonucleoprotein enzyme with two kinds of primer specificity. // Cell 51, 887–898 (1987).
7.Greider C. W. & Blackburn E. H. A telomeric sequence in the RNA of Tetrahymena telomerase required for telomere repeats synthesis. // Nature 337, 331–337 (1989).