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The Effect of Aging on Tissues

The Effect of Aging on Tissues

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...

Bone Disorders

Bone Disorders

Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...

Mitochondria

Mitochondria

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,...

Aging

Aging

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...

Growth of Cartilage and Bone Tissue

Growth of Cartilage and Bone Tissue

Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...

Replicative Cell Senescence

Replicative Cell Senescence

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 the telomeric...

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Related Experiment Video

Updated: Jun 10, 2026

Real-time Visualization and Analysis of Chondrocyte Injury Due to Mechanical Loading in Fully Intact Murine Cartilage Explants

Real-time Visualization and Analysis of Chondrocyte Injury Due to Mechanical Loading in Fully Intact Murine Cartilage Explants

Published on: January 7, 2019

Joint aging and chondrocyte cell death.

Shawn P Grogan, Darryl D D'Lima

International Journal of Clinical Rheumatology

|July 31, 2010

Summary

Articular cartilage aging affects extracellular matrix and cell function, contributing to osteoarthritis. Inhibiting chondrocyte (cartilage cell) death may slow disease progression and maintain joint health.

Area of Science:

Biomedical Science
Orthopedics
Cell Biology

Background:

Articular cartilage aging involves changes in extracellular matrix and cell function, key drivers of osteoarthritis (OA).
Chondrocyte (cartilage cell) death is a significant factor in both early and late stages of OA development and progression.
Understanding these age-related changes is crucial for developing effective OA treatments.

Purpose of the Study:

To explore the association between cartilage aging, chondrocyte death, and osteoarthritis.
To discuss how altered conditions during aging influence chondrocyte survival.
To highlight the potential of preventing cell loss for OA management and tissue homeostasis.

Main Methods:

Review and synthesis of existing literature on cartilage aging and osteoarthritis.

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Establishment and Evaluation of a Sheep Model of Full-thickness Osteochondral Defect

Establishment and Evaluation of a Sheep Model of Full-thickness Osteochondral Defect

Published on: April 14, 2026

Related Experiment Videos

Last Updated: Jun 10, 2026

Real-time Visualization and Analysis of Chondrocyte Injury Due to Mechanical Loading in Fully Intact Murine Cartilage Explants

Real-time Visualization and Analysis of Chondrocyte Injury Due to Mechanical Loading in Fully Intact Murine Cartilage Explants

Published on: January 7, 2019

Establishment and Evaluation of a Sheep Model of Full-thickness Osteochondral Defect

Establishment and Evaluation of a Sheep Model of Full-thickness Osteochondral Defect

Published on: April 14, 2026

Analysis of the role of cell death pathways in aged articular cartilage.

Discussion of pharmacologic strategies targeting cell death in OA.

Main Results:

Aging significantly alters articular cartilage extracellular matrix and chondrocyte function.
Chondrocyte death is implicated across all stages of osteoarthritis.
Pharmacologic inhibition of cell death presents a promising therapeutic avenue for OA.

Conclusions:

Targeting chondrocyte death is a viable strategy to retard osteoarthritis progression.
Preserving chondrocyte homeostasis is essential for maintaining joint tissue health.
Pharmacologic interventions against cell death may offer clinical benefits at any stage of OA.