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COG5-CDG with a Mild Neurohepatic Presentation

C W Fung1, G Matthijs, L Sturiale

  • 1Department of Pediatrics and Adolescent Medicine, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong.

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|February 23, 2013
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Summary

Genetic defects in the conserved oligomeric Golgi (COG) complex cause congenital disorders of glycosylation (CDG). This study reports the second patient with COG5-CDG, presenting with mild neurohepatic disease and both central and peripheral neurological issues.

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Area of Science:

  • Molecular biology
  • Genetics
  • Biochemistry

Background:

  • The conserved oligomeric Golgi (COG) complex is crucial for retrograde transport within the Golgi apparatus.
  • COG complex dysfunction impacts Golgi glycosyltransferases, affecting N- and O-glycosylation processes.
  • Genetic defects in COG subunits lead to congenital disorders of glycosylation (CDG).

Purpose of the Study:

  • To report and characterize the second patient diagnosed with a defect in the COG5 subunit (COG5-CDG).
  • To compare the clinical presentation of this patient with the previously reported COG5-CDG case.

Main Methods:

  • Clinical case study.
  • Genetic analysis (implied).
  • Phenotypic description.

Main Results:

  • The second patient with COG5-CDG presented with a mild neurohepatic disease.
  • This patient exhibited both central and peripheral neurological involvement.
  • This contrasts with the first reported COG5-CDG patient, who had only mild central neurological involvement.

Conclusions:

  • COG5-CDG can manifest with a broader range of neurological symptoms than previously described.
  • Further research is needed to understand the full spectrum of COG5-CDG phenotypes and genotype-phenotype correlations.