Related Experiment Video
Updated: May 17, 2026
09:58
A 3D System for Culturing Human Articular Chondrocytes in Synovial Fluid
Published on: January 31, 2012
Syndecans in cartilage breakdown and synovial inflammation
1Institute of Experimental Musculoskeletal Medicine, University Hospital Münster, Domagkstraße 3, D-48149 Münster, Germany. thomas.pap@uni-muenster.de
Nature Reviews. Rheumatology
|October 24, 2012
Summary
Syndecans, transmembrane heparan sulphate proteoglycans, regulate cartilage development and remodeling. Their unique structure and signaling capabilities are crucial for joint health and disease.
Area of Science:
- Biochemistry
- Cell Biology
- Molecular Biology
Background:
- Syndecans are transmembrane heparan sulphate proteoglycans (HSPGs) crucial for tissue development and remodeling.
- They consist of a core protein with attached glycosaminoglycan (GAG) chains, mediating interactions with extracellular molecules and soluble mediators.
- Syndecan GAG chain structure and modification vary, contributing to complex functions and unique signaling via intracellular motifs like protein kinase C.
Purpose of the Study:
- To review the biology of syndecans and their mechanisms of action, particularly in joint tissues.
- To discuss syndecan regulation and their roles in joint development, degeneration, and inflammation.
- To highlight findings from expression studies and syndecan-deficient mouse models.
Main Methods:
- Literature review of syndecan biology and function.
- Analysis of expression patterns in joint tissues.
- Inclusion of data from syndecan-deficient mouse models.
Main Results:
- Syndecans bind various extracellular matrix molecules and soluble mediators via their GAG chains.
- They possess unique intracellular signaling motifs, initiating pathways like protein kinase C.
- Expression studies and functional analyses reveal syndecan roles in joint development and cartilage remodeling.
Conclusions:
- Syndecans are key regulators of cartilage development and remodeling in the joints.
- Their complex structure and signaling pathways are vital for maintaining joint homeostasis.
- Understanding syndecan function is critical for addressing joint degenerative and inflammatory conditions.
Related Concept Videos
01:16Structural Joints: Synovial Joints
Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...
01:17Structural Joints: Cartilaginous Joints
As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
There are two types of cartilaginous joints:
Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary or...
There are two types of cartilaginous joints:
Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary or...
01:07Development of the Limb Synovial Joints
Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
01:24T Cell Types and Functions
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
01:20Structural Classification of Joints
Joints, also known as articulations, are classified based on their structural characteristics, i.e., based on whether the articulating surfaces of the adjacent bones are directly connected by fibrous connective tissue or cartilage, or whether the articulating surfaces contact each other within a fluid-filled joint cavity. These differences serve to divide the joints of the body into three structural classifications.
A fibrous joint is where the adjacent bones are united by fibrous connective...
A fibrous joint is where the adjacent bones are united by fibrous connective...
01:12Chronic Inflammation: Introduction
Chronic inflammation is a prolonged, dysregulated immune response that persists for weeks to years when the inciting stimulus is difficult to eradicate or when self‑antigens drive ongoing reactivity. Morphologically, it is defined by mononuclear cell infiltration, progressive tissue destruction, and concurrent attempts at healing via angiogenesis and fibrosis. Compared with acute inflammation, edema is less prominent while cellular infiltration predominates; triggers include persistent...