Mucopolysaccharidosis type I and craniosynostosis
Jawad Ziyadeh1, Martine Le Merrer, Matthieu Robert
1Craniofacial Unit, Department of Pediatric Neurosurgery, Hôpital Universitaire Necker-Enfants Malades, APHP, 149 Rue de Sèvres, 75015, Paris, France, jawad.ziyadeh@neurochirurgie.fr.
Acta Neurochirurgica
|August 7, 2013
Summary
Mucopolysaccharidosis type-I (MPS-I), a metabolic disorder, was linked to craniosynostosis in a rare case. This association underscores the need for comprehensive evaluations in children with MPS-I.
Area of Science:
- Genetics and rare diseases
- Metabolic disorders
- Pediatric medicine
Background:
- Mucopolysaccharidosis type-I (MPS-I) is a lysosomal storage disorder caused by alpha-L-iduronidase deficiency.
- Glycosaminoglycan accumulation in MPS-I affects multiple organs, leading to physical and functional impairments.
Observation:
- A 2.5-year-old girl presented with macrocrania and was diagnosed with MPS-I (Hurler-Scheie subtype).
- Clinical and radiological findings revealed scaphocephaly and dysmorphic facial features consistent with MPS-I.
- Fundoscopy and ICP monitoring confirmed intracranial hypertension, which was surgically managed.
Findings:
- This case represents the first reported association between MPS-I (Hurler-Scheie subtype) and craniosynostosis (scaphocephaly).
- The patient exhibited significant intracranial hypertension secondary to the craniosynostosis.
Implications:
- Highlights the importance of recognizing craniosynostosis in patients with MPS-I.
- Emphasizes the necessity of multidisciplinary team evaluations, including craniofacial, metabolic, and ophthalmologic specialists.
- Suggests that early detection and management of associated conditions like craniosynostosis may improve patient outcomes.
Related Concept Videos
Proteoglycans
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,...
Sutures of the Skull
The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
Glycosaminoglycans
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...
Cranial and Spinal Meninges
The cranial and spinal meninges are complex protective structures surrounding the central nervous system (CNS), consisting of the brain and spinal cord. These meninges consist of the dura mater, the arachnoid mater, and the pia mater. They protect the CNS, provide structural support, and aid in circulating cerebrospinal fluid (CSF).
Cranial Meninges
These meningeal layers cover the cranium. The dura mater is the outermost layer of cranial meninges. It is a thick and durable membrane of dense...
Cranial Meninges
These meningeal layers cover the cranium. The dura mater is the outermost layer of cranial meninges. It is a thick and durable membrane of dense...
Cohesins
Cohesin protein complexes are a molecular glue that holds two sister chromatids together. They play an important role both in mitosis and meiosis. In mitosis, all cohesin complexes present on the chromosomes are removed before the start of the anaphase stage.
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of homologous...
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of homologous...
Lysosomal 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,...

