Aging Organism
Aging Organism - Related Videos
09:14
An Introduction to Aging and Regeneration
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2023
Tissues are maintained through a balance of cellular aging and regeneration. Aging refers to the gradual loss of cellular function, and regeneration is the repair of damaged tissue generally mediated by preexisting adult or somatic stem cells. Scientists are interested in understanding the biological mechanisms behind these two complex processes. By doing so, researchers may be able to use somatic stem cells to treat degenerative diseases and develop therapies that could delay the effects of...
09:10
Measuring Single-Cell Aging with an Imaging-based Biomarker of Chromatin and Epigenetic Aging
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2026
The protocol presents the imaging and computational workflow to extract and validate imaging-based chromatin and epigenetic age (ImAge).
10:41
Continuous High-resolution Microscopic Observation of Replicative Aging in Budding Yeast
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Cited by 10 •
2013
We describe here the operation of a microfluidic device that allows continuous and high-resolution microscopic imaging of single budding yeast cells during their complete replicative and/or chronological lifespan.
01:26
Aging
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2025
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...
06:58
Frailty Assessment in an Aging Mouse Model
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2025
The goal of the present protocol is to provide instructions and guidelines for assessing physical frailty in C57Bl/6x129J laboratory mice. Specific details regarding each measure used in the physical frailty index are explained. Several methods for reporting frailty results are also presented.
FAQs
In an aging organism, cellular damage accumulates while DNA repair and protein maintenance decline. These changes interact with mitochondrial dysfunction, altered nutrient-sensing pathways, and the increasing presence of senescent cells. Studying these processes together helps explain why physiological resilience decreases rather than attributing aging to one isolated defect.
Nutrient-sensing pathways and mitochondrial function represent distinct but interacting areas of biological change. Altered nutrient sensing can be examined alongside mitochondrial dysfunction to understand how cellular regulation and energy-related processes change with age. Considering both helps researchers investigate aging as a connected network of mechanisms rather than as the failure of a single pathway.
Senescent cells are an increasing feature of aging organisms and provide a way to study how cellular states change over time. Their presence can be examined alongside accumulated damage, impaired maintenance, and mitochondrial dysfunction. This comparison helps researchers investigate how cellular changes relate to tissue function, disease susceptibility, and broader declines in physiological resilience.
Researchers can follow aging across several biological levels, beginning with molecular and cellular changes and then examining tissues, behavior, and survival. This multilevel approach links mechanisms such as impaired DNA repair or protein maintenance with observable organism-level outcomes. It is useful because no single measurement captures the full relationship between cellular damage and declining function.
Useful observations span molecular and cellular mechanisms, tissue condition, behavior, and survival. Researchers can also examine DNA repair, protein maintenance, nutrient-sensing pathways, mitochondrial dysfunction, and senescent cells as related features. Combining these observations helps connect biological changes at different scales and clarifies how aging affects function rather than focusing on one isolated marker.
Researchers use aging organisms to connect biological mechanisms with age-related disease, regenerative biology, lifespan, and interventions intended to preserve health and function later in life. The value lies in relating molecular and cellular changes to tissue, behavioral, or survival outcomes. This makes aging research relevant to both fundamental biology and studies of later-life health.