Related Experiment Video
Updated: Apr 17, 2026
11:24
Measuring DNA Damage and Repair in Mouse Splenocytes After Chronic In Vivo Exposure to Very Low Doses of Beta- and Gamma-Radiation
Published on: July 3, 2015
11.6K
Aging and radiation: bad companions.
Laia Hernández1, Mariona Terradas, Jordi Camps
1Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain.
Aging Cell
|February 4, 2015
Summary
Aging increases cancer risk from radiation due to cellular changes like inflammation and DNA repair decline. Understanding these age-related radiosensitivity factors is crucial for protecting older adults.
Area of Science:
- Gerontology
- Radiation Biology
- Molecular Biology
Background:
- Aging is characterized by cellular functional decline, increasing susceptibility to oncogenic transformation.
- Carcinogenic risks from radiation exposure are known to increase with age in adults.
Purpose of the Study:
- To review the mechanistic interplay of age-related cellular changes contributing to increased radiosensitivity.
- To highlight the importance of radiation protection strategies for the elderly.
Main Methods:
- Literature review focusing on cellular mechanisms of aging and radiation response.
- Integration of data on inflammatory response, oxidant/antioxidant balance, telomere attrition, DNA damage response, and nuclear organization.
Main Results:
- Age-related factors such as increased inflammation, loss of redox balance, telomere attrition, and impaired DNA repair compromise genomic integrity.
- These factors collectively enhance cellular sensitivity to radiation, increasing cancer risk in older individuals.
Conclusions:
- A comprehensive understanding of aging-related radiosensitivity mechanisms is vital for developing effective radiation protection for the elderly.
- Given increasing life expectancy and medical interventions, prioritizing radiation safety in aging populations is of paramount importance.
Related Concept Videos
01:19The Effect of Aging on Tissues
4.2K
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...
4.2K
01:35Mutations
46.7K
Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
46.7K
01:39Mutations
98.4K
Overview
98.4K
01:26Aging
1.1K
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...
1.1K
02:59Biological Effects of Radiation
19.9K
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
19.9K
01:22Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption
824
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...
824