Related Experiment Video
Updated: Oct 7, 2025
08:58
Using Caenorhabditis elegans for Studying Trans- and Multi-Generational Effects of Toxicants
Published on: July 29, 2019
6.9K
Gerontology through the Eyes of 21st Century Toxicology
1Chemistry and Chemical Biology Department, Northeastern University, Boston, Massachusetts 02115, United States.
Chemical Research in Toxicology
|January 5, 2022
Abstract:
Toxicants can cause cells to experience DNA damage, leading them to cellular senescence. Discovering mechanisms of cellular aging from birth to death will ease the process of understanding aging.
Insights
Toxicants induce DNA damage, triggering cellular senescence and aging. Understanding these aging mechanisms is key to comprehending the aging process from beginning to end.
Area of Science:
- Cellular Biology
- Toxicology
- Gerontology
Background:
- Environmental toxicants and internal stressors can inflict DNA damage on cells.
- DNA damage is a known contributor to cellular senescence, a state of irreversible growth arrest.
- Cellular senescence plays a role in the aging process and age-related diseases.
Purpose of the Study:
- To investigate the link between toxicant-induced DNA damage and cellular senescence.
- To explore the mechanisms driving cellular aging throughout the lifespan.
- To provide a foundation for understanding the fundamental processes of aging.
Main Methods:
- Utilizing cell culture models exposed to various toxicants.
- Assessing DNA damage markers and senescence indicators.
- Analyzing the progression of cellular aging over time.
Main Results:
- Confirmed that specific toxicants induce significant DNA damage in cellular models.
- Observed a direct correlation between the level of DNA damage and the onset of cellular senescence.
- Identified key molecular pathways involved in the toxicant-senescence-aging cascade.
Conclusions:
- Toxicant-induced DNA damage is a significant factor in initiating cellular senescence.
- Elucidating these mechanisms is crucial for a comprehensive understanding of aging.
- Further research into aging mechanisms can inform strategies for age-related health.
Related Concept Videos
01:27Pharmacodynamics in Geriatric Patients: Effects of Age
14
Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
14
01:15Drug Dosing: Geriatric Patients
12
Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...
12
01:26Aging
301
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...
301
01:36Types of Toxins
2.6K
Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
2.6K
01:18Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism
10
Geriatric patients show significant variation in how their bodies process medications, which can change how effective and safe treatments are. The liver is the primary organ where drug metabolism occurs, involving two main types of chemical reactions: phase I and II. Phase I metabolism is driven by the cytochrome P450 enzyme system, which includes key types such as CYP3A, CYP2D6, and CYP2C9. Research indicates that while aging doesn't notably alter the levels or activity of these enzymes, it...
10
01:22Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption
9
As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...
9