Alteration of cartilage specific proteoglycan with non-weight bearing articular cartilage. 1994

Y Yutani, and K Inui, and T Koike, and Y Yamano
Department of Orthopaedics, Osaka City University Medical School, Japan.

The cartilage composed of chondrocytes and their surrounding extracellular matrix, and mechanical motion of joint may influence on the metabolism of cartilage. In order to determine whether non-weight bearing status alter the metabolism of cartilage, we made histological and biochemical analysis with incorporation of 35S and the distribution of the molecular size of proteoglycans produced in the case of disused cartilage. Histologically, there were seen no disorder in cell arrangement, but poorer in cellularity and thinner in cartilage width as compared with normal one. Biochemical analysis, however demonstrate that incorporation of 35S in newly synthesized glycosaminoglycan (GAG) was lower and the molecular size also smaller than that of control suggesting that mechanical stress is an important environmental factor in maintaining the differential function of the cartilage.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D008970 Molecular Weight The sum of the weight of all the atoms in a molecule. Molecular Weights,Weight, Molecular,Weights, Molecular
D011509 Proteoglycans Glycoproteins which have a very high polysaccharide content. Proteoglycan,Proteoglycan Type H
D002358 Cartilage, Articular A protective layer of firm, flexible cartilage over the articulating ends of bones. It provides a smooth surface for joint movement, protecting the ends of long bones from wear at points of contact. Articular Cartilage,Articular Cartilages,Cartilages, Articular
D006025 Glycosaminoglycans Heteropolysaccharides which contain an N-acetylated hexosamine in a characteristic repeating disaccharide unit. The repeating structure of each disaccharide involves alternate 1,4- and 1,3-linkages consisting of either N-acetylglucosamine (see ACETYLGLUCOSAMINE) or N-acetylgalactosamine (see ACETYLGALACTOSAMINE). Glycosaminoglycan,Mucopolysaccharides
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013314 Stress, Mechanical A purely physical condition which exists within any material because of strain or deformation by external forces or by non-uniform thermal expansion; expressed quantitatively in units of force per unit area. Mechanical Stress,Mechanical Stresses,Stresses, Mechanical

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