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Skeletal modifications in mucopolysaccharidoses: an overview
Journal of Biological Regulators and Homeostatic Agents
|April 6, 2012
Summary
Mucopolysaccharidoses (MPS) are rare genetic disorders causing complex carbohydrate buildup, leading to skeletal and joint issues. Early treatment of pelvic and spine pathologies in MPS is crucial for improving quality of life.
Area of Science:
- Biochemistry
- Genetics
- Rare Diseases
Background:
- Mucopolysaccharidoses (MPS) are rare genetic disorders resulting from enzyme deficiencies.
- These deficiencies impair the breakdown of complex carbohydrates, leading to harmful lysosomal accumulation of glycosaminoglycans like dermatan sulfate, heparan sulfate, and keratan sulfate.
- This accumulation causes multi-system complications affecting various tissues.
Discussion:
- Most MPS types, excluding MPS III, present with significant skeletal abnormalities and joint disease.
- This study focuses on analyzing clinical, pathological, and radiological features of MPS, with a specific emphasis on pelvic and spine pathologies.
- These spinal and pelvic issues often severely limit patient activity and quality of life.
Key Insights:
- Early identification and intervention for pelvic and spine pathologies in MPS are essential.
- Addressing these manifestations at the onset can prevent major complications.
- Targeted treatment strategies can significantly improve the overall quality of life for individuals with MPS.
Outlook:
- Further research into the specific mechanisms of skeletal and joint involvement in MPS is warranted.
- Developing novel therapeutic approaches for managing MPS-related musculoskeletal complications is a key future direction.
- Long-term studies evaluating the efficacy of early interventions on patient outcomes are needed.
Related Concept Videos
01:23Glycosaminoglycans
Glycosaminoglycans (GAGs), also known as mucopolysaccharides, are long and linear polymers comprising of specific repeating disaccharides - the amino sugar that can be N-acetylglucosamine or N-acetylgalactosamine, and a uronic acid that is usually glucuronic acid or iduronic acid.
GAGS are found in the extracellular matrix of vertebrates, invertebrates, and bacteria. Due to their polar nature they attract water, and serve as excellent lubricants or shock absorbers in an animal body.
Hyaluronic...
GAGS are found in the extracellular matrix of vertebrates, invertebrates, and bacteria. Due to their polar nature they attract water, and serve as excellent lubricants or shock absorbers in an animal body.
Hyaluronic...
01:05Proteoglycans
Glycans, a class of complex heterogeneous molecules, can be covalently attached to proteins to form glycosylated proteins that regulate various physiological and pathological processes. Glycosylated proteins or glycoproteins comprise N-linked and O-linked oligosaccharides. O-glycosylation is the most common type of protein glycosylation. Here, glycans attach to the oxygen atom of the hydroxyl groups of Serine or Threonine residues. O-linked glycosylation occurs later in protein processing,...
01:22Lysosomal Hydrolases
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
01:24Oligosaccharide Assembly
Protein glycosylation starts in the ER lumen and continues in the Golgi apparatus. Glycosyltransferases catalyze the addition of sugar molecules or glycosylation of proteins. Usually, these enzymes add sugars to the hydroxyl groups of selected serine or threonine residues to form O-linked glycans or the amino groups of asparagine residues to form N-linked glycans. Different positions on the same polypeptide chain can contain differently linked glycans.
Multiple sugar molecules that may or may...
Multiple sugar molecules that may or may...
01:25Protein Glycosylation
Glycosylation, the most common post-translational modification for proteins, serves diverse functions. Adding sugars to proteins makes the proteins more resistant to proteolytic digestion. Glycosylated proteins can act as markers and receptors to promote cell-cell adhesion. Additionally, they have many essential quality control functions in the cell, such as correct protein folding and facilitating transport of misfolded proteins to the cytosol, which can be degraded.
Glycosylation occurs in...
Glycosylation occurs in...
01:09Cytoskeletal Linker Proteins - Plakins
Plakins are large proteins with binding domains for microtubules, microfilaments, intermediate filaments, and membrane-associated protein complexes at cell junctions. Plakin functions are evolutionarily conserved and are primarily involved in organizing the different components of the cytoskeleton by crosslinking them to each other and connecting them to the cell-matrix and cell adhesion complexes. They are also known to interact with signal transducers, serve as scaffolds for signaling...