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Lysosomal dysfunction, cellular pathology and clinical symptoms: basic principles.

Arnold J J Reuser1, Maarten R Drost

  • 1Department of Clinical Genetics, Erasmus MC, Rotterdam, The Netherlands. a.reuser@erasmusmc.nl

Acta Paediatrica (Oslo, Norway : 1992). Supplement
|May 25, 2006
PubMed
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Lysosomal storage disorders (LSDs) involve gene mutations causing cellular dysfunction and organ damage. Enzyme replacement therapy may reverse damage, but effectiveness varies by LSD and disease stage.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Genetics

Background:

  • Over 40-50 lysosomal storage disorders (LSDs) are identified.
  • The precise pathogenic mechanisms of most LSDs remain unclear.
  • Lysosomes are crucial for cellular waste breakdown; their dysfunction leads to disease.

Purpose of the Study:

  • To review the fundamental principles of lysosomal pathogenesis.
  • To outline the clinical outcomes of impaired lysosomal gene function.
  • To discuss enzyme replacement therapy (ERT) for preventing and reversing LSD-induced damage.

Main Methods:

  • Literature review of lysosomal storage disorders.
  • Analysis of molecular and pathological events in LSDs.
  • Presentation of a mechanical model for Pompe disease muscle pathology.

Related Experiment Videos

Main Results:

  • Lysosomal dysfunction, stemming from gene mutations, drives cellular pathology and organ damage.
  • Glycogen-loaded lysosomes in Pompe disease exert direct mechanical effects, impairing muscle force.
  • The sequence of pathological events in LSDs is generally consistent across different disorders.

Conclusions:

  • While each LSD and patient presents unique features, the pathological cascade is similar.
  • Cellular pathology impacts organ structure and function, leading to clinical symptoms.
  • The success of enzyme replacement therapy in reversing symptoms depends on the specific LSD and the stage of organ pathology.