Hyaline cartilage

Hyaline cartilage is the most common and widely distributed type of cartilage in the human body, serving as a vital structural component in the respiratory system (trachea, larynx, and bronchi), the nose, and the articulating surfaces of bones (StatPearls, 2023). It is characterized by a translucent, bluish-white appearance and is primarily composed of a dense extracellular matrix containing Type II collagen fibers and proteoglycans like aggrecan, which provide high tensile strength and resilience (NIH/NCBI, 2023). Because hyaline cartilage is avascular, aneural, and alymphatic, it relies on diffusion for nutrients and possesses a very limited capacity for self-repair following injury or age-related wear. In clinical medicine, the progressive degradation of hyaline cartilage is the defining characteristic of osteoarthritis, leading to pain and loss of joint mobility (Arthritis Foundation, 2024). While the tissue itself is not a molecular target, it is the site of action for various chondroprotective agents and regenerative therapies. Modern drug development focuses on preserving the cartilage matrix by inhibiting degradative enzymes such as matrix metalloproteinases (MMPs) or stimulating chondrocyte activity through growth factors like FGF18 (PubMed, 2022). Its unique physical properties and lack of regenerative ability make it a major focus of tissue engineering and regenerative medicine research.

Other names

Articular cartilageGrisel's cartilageGlassy cartilage

Therapeutic strategies involve viscosupplementation to restore lubrication, stimulation of FGF18 receptors on chondrocytes to promote proliferation, and inhibition of Wnt signaling or catabolic enzymes like MMPs and ADAMTS to prevent matrix degradation.