Related Experiment Video
Updated: Jun 29, 2025
12:08
Telomere Length and Telomerase Activity; A Yin and Yang of Cell Senescence
Published on: May 22, 2013
46.5K
Telomeres and aging: on and off the planet!
Christopher E Mason1,2, Maria A Sierra2,3, Henry J Feng4,5
1Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA.
Biogerontology
|April 6, 2024
Summary
Telomeres shorten with cell division, impacting aging and disease risk. The NASA Twins Study offers insights into spaceflight
Area of Science:
- Genomics
- Space Medicine
- Aging Research
Background:
- Telomeres protect chromosome ends and shorten with cell division.
- Telomere attrition is linked to aging and age-related diseases.
- Space exploration poses unique stressors with unknown effects on telomeres and health.
Purpose of the Study:
- To review current understanding of telomere biology in aging.
- To assess the impact of spaceflight on human health and aging.
- To explore strategies for human survival and longevity in space.
Main Methods:
- Review of existing literature on telomere biology and aging.
- Analysis of data from the NASA Twins Study on spaceflight effects.
- Extrapolation of findings to future long-duration space missions.
Main Results:
- Telomere shortening is a hallmark of aging and a tumor suppressor mechanism.
- The NASA Twins Study provides comprehensive data on spaceflight's health impacts.
- Understanding telomere dynamics is crucial for astronaut health.
Conclusions:
- Telomere attrition is a key factor in aging and disease.
- Space exploration presents novel challenges to human healthspan.
- Personalized space medicine and biochemical strategies are vital for future missions.
More Related Videos
Related Concept Videos
02:41Telomeres and Telomerase
5.2K
5.2K
01:29Replication in Eukaryotes
13.7K
In eukaryotic cells, DNA replication is highly conserved and tightly regulated. Multiple linear chromosomes must be duplicated with high fidelity before cell division, so there are many proteins that fulfill specialized roles in the replication process. Replication occurs in three phases: initiation, elongation, and termination, and ends with two complete sets of chromosomes in the nucleus.
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...
13.7K
02:15Replicative Cell Senescence
3.6K
Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds...
3.6K
01:26Aging
49
Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
49
01:37Mitochondria
12.4K
Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
12.4K
01:19The Effect of Aging on Tissues
2.1K
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
2.1K