From genoprotection to rejuvenation
1Frontiers in Bioscience Research Institute in Aging and Cancer, 16471 Scientific Way, Irvine CA 92618, fbs@bioscience.org.
Frontiers in Bioscience (Landmark Edition)
|October 13, 2020
Summary
Strategies to combat aging involve interventions targeting nutrient sensors like AMPK and mTOR. These approaches, including dietary changes and NAD+ precursors, can extend lifespan and healthspan, potentially reversing aging signs.
Area of Science:
- Gerontology and cellular aging research.
- Molecular mechanisms of aging and longevity.
Background:
- Aging is characterized by impaired signaling pathways and reduced cellular functions.
- Key nutrient-sensing pathways (AMPK, mTOR, IIS, sirtuins, NFkB, FOXO) are central to aging processes.
Purpose of the Study:
- To review current anti-aging strategies and their impact on lifespan and healthspan.
- To explore interventions targeting cellular aging and tissue homeostasis.
Main Methods:
- Review of dietary, genetic, and pharmacological interventions.
- Analysis of molecular pathways and cellular processes involved in aging.
- Examination of emerging anti-aging technologies.
Main Results:
- Calorie restriction, dietary changes, and compounds like NAM, NMN, NR, NAD+, and hydrogen sulfide can delay aging.
- Senotherapeutics, senolytics, senomorphics, and anti-inflammaging strategies address age-related decline.
- Epigenetic reprogramming offers potential for reversing aging signs.
Conclusions:
- Multiple interventions targeting nutrient sensors and cellular functions can extend lifespan and healthspan.
- A combination of strategies, including senotherapeutics and epigenetic reprogramming, holds promise for combating aging.
Related Concept Videos
Overview of Regeneration and Repair
4.8K
Regeneration and repair processes are critical in healing damages caused by injury, disease, and aging. In regeneration, the damaged tissue is entirely replaced with new growth that restores the original architecture and function. In contrast, tissue repair usually results in a fixed tissue architecture involving scar formation. Scars generally do not reestablish tissue function and may also exhibit structural abnormalities at the injury site.
Regeneration
All animals have varying degrees of...
Regeneration
All animals have varying degrees of...
4.8K
Whole Body Regeneration
3.9K
Regeneration is the process of restoring injured or lost tissues, organs, or body parts. While simpler organisms generally show greater ability to regenerate their whole body, few complex animals show similarly exceptional regeneration. For example, planarian flatworms have a unique regenerative potential making them a popular study organism among biologists to understand the mechanisms of whole body regeneration. Other organisms, such as hydra, also show extreme regeneration potential;...
3.9K
Renewal of Skin Epidermal Stem Cells
2.8K
The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular...
2.8K
Replicative Cell Senescence
4.2K
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...
4.2K
Tissue Renewal without Stem Cells
2.0K
After cellular or tissue damage, the resident stem cells present in the human body can locally repair and regenerate the damaged tissue or organ. However, even though some tissues do not have stem cells, they can repair and regenerate with the help of pre-existing cells. For example, beta cells of the pancreas and hepatocytes of the liver can divide to renew and regenerate the tissue. Here, both cell division and cell death are well regulated by homeostasis.
However, failure of such a system...
However, failure of such a system...
2.0K
The Effect of Aging on Tissues
3.0K
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...
3.0K


