Biomaterial Database

The effect of lipopolysaccharide from bacteroides gingivalis and muramyl dipeptide on osteoblast collagenase release. 1989

H J Sismey-Durrant, and S J Atkinson, and R M Hopps, and J K Heath

Department of Oral Pathology, London Hospital Medical College, England.

In order to determine whether the bacterial bone resorbing agents lipopolysaccharide (LPS) and muramyl dipeptide (MDP) interact with osteoblasts, their effect on the synthesis of collagenase and tissue inhibitor or metalloproteinases (TIMP) from monolayer cultures of mouse osteoblast-like cells was investigated. All concentrations of LPS (0.1, 1.0 and 10.0 micrograms/ml) significantly stimulated collagenase levels compared to unstimulated controls. This suggests that LPS, like hormonal stimulators of bone resorption, interacts with osteoblasts. In contrast, MDP (0.01, 0.1 and 1 microM) did not significantly stimulate collagenase or TIMP levels, indicating that MDP may not interact with osteoblasts. Possible alternative mechanisms of MDP-mediated bone resorption are discussed.

UI	MeSH Term	Description	Entries
D008070	Lipopolysaccharides	Lipid-containing polysaccharides which are endotoxins and important group-specific antigens. They are often derived from the cell wall of gram-negative bacteria and induce immunoglobulin secretion. The lipopolysaccharide molecule consists of three parts: LIPID A, core polysaccharide, and O-specific chains (O ANTIGENS). When derived from Escherichia coli, lipopolysaccharides serve as polyclonal B-cell mitogens commonly used in laboratory immunology. (From Dorland, 28th ed)	Lipopolysaccharide,Lipoglycans
D010006	Osteoblasts	Bone-forming cells which secrete an EXTRACELLULAR MATRIX. HYDROXYAPATITE crystals are then deposited into the matrix to form bone.	Osteoblast
D002478	Cells, Cultured	Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others.	Cultured Cells,Cell, Cultured,Cultured Cell
D003012	Microbial Collagenase	A metalloproteinase which degrades helical regions of native collagen to small fragments. Preferred cleavage is -Gly in the sequence -Pro-Xaa-Gly-Pro-. Six forms (or 2 classes) have been isolated from Clostridium histolyticum that are immunologically cross-reactive but possess different sequences and different specificities. Other variants have been isolated from Bacillus cereus, Empedobacter collagenolyticum, Pseudomonas marinoglutinosa, and species of Vibrio and Streptomyces. EC 3.4.24.3.	Clostridiopeptidase A,Clostridium histolyticum Collagenase,Collagenase, Microbial,Collagenase Clostridium histolyticum,Collagenase-Like Peptidase,Collalysine,Nucleolysin,Clostridium histolyticum, Collagenase,Collagenase Like Peptidase,Collagenase, Clostridium histolyticum,Peptidase, Collagenase-Like,histolyticum, Collagenase Clostridium
D004791	Enzyme Inhibitors	Compounds or agents that combine with an enzyme in such a manner as to prevent the normal substrate-enzyme combination and the catalytic reaction.	Enzyme Inhibitor,Inhibitor, Enzyme,Inhibitors, Enzyme
D000119	Acetylmuramyl-Alanyl-Isoglutamine	Peptidoglycan immunoadjuvant originally isolated from bacterial cell wall fragments; also acts as pyrogen and may cause arthritis; stimulates both humoral and cellular immunity.	Mur-NAc-L-Ala-D-isoGln,Muramyl Dipeptide,Acetylmuramyl Alanyl Isoglutamine,N-Acetyl-Muramyl-L-Alanyl-D-Glutamic-alpha-Amide,N-Acetylmuramyl-L-Alanyl-D-Isoglutamine,Alanyl Isoglutamine, Acetylmuramyl,Dipeptide, Muramyl,Isoglutamine, Acetylmuramyl Alanyl,Mur NAc L Ala D isoGln,N Acetyl Muramyl L Alanyl D Glutamic alpha Amide,N Acetylmuramyl L Alanyl D Isoglutamine
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D001439	Bacteroides	A genus of gram-negative, anaerobic, rod-shaped bacteria. Its organisms are normal inhabitants of the oral, respiratory, intestinal, and urogenital cavities of humans, animals, and insects. Some species may be pathogenic.
D019714	Tissue Inhibitor of Metalloproteinases	A family of secreted protease inhibitory proteins that regulates the activity of SECRETED MATRIX METALLOENDOPEPTIDASES. They play an important role in modulating the proteolysis of EXTRACELLULAR MATRIX, most notably during tissue remodeling and inflammatory processes.	Tissue Inhibitor of Metalloproteinase,TIMP Proteins,Metalloproteinase Tissue Inhibitor,Metalloproteinases Tissue Inhibitor,Proteins, TIMP