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Lysosomal Hydrolases01:22

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,...
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Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
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Multicolor Flow Cytometry-based Quantification of Mitochondria and Lysosomes in T Cells
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Immune system irregularities in lysosomal storage disorders.

Julian A Castaneda1, Ming J Lim, Jonathan D Cooper

  • 1Center for Aging and Developmental Biology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA.

Acta Neuropathologica
|October 10, 2007
PubMed
Summary

Lysosomal storage disorders (LSDs) involve cellular material buildup, impacting neurological and immune functions. This review explores the link between lysosomal dysfunction in LSDs and immune system alterations.

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Area of Science:

  • Cell Biology
  • Immunology
  • Genetics

Background:

  • Lysosomal storage disorders (LSDs) are inherited diseases causing cellular material accumulation.
  • LSDs often lead to severe neurological impairment and can affect immune system function.
  • The lysosome is critical for cellular processes, including immune functions like antigen presentation.

Purpose of the Study:

  • To review the role of the lysosome in immune system function.
  • To examine evidence linking LSDs to immune system irregularities.
  • To bridge biochemical and clinical data on LSDs and neuroimmune responses.

Main Methods:

  • Literature review of biochemical studies on lysosomal function.
  • Analysis of clinical data on immune system abnormalities in LSD patients.
  • Synthesis of information on neuroimmune responses in LSDs.

Main Results:

  • LSDs can predispose patients to either immune suppression (e.g., Gaucher disease) or hyperactivity (e.g., Niemann-Pick disease C1).
  • Lysosomes are integral to key immune processes such as antigen presentation and mediator release.
  • Emerging evidence suggests early neuroimmune responses in various LSDs.

Conclusions:

  • The lysosome's role in the immune system is multifaceted and significantly impacted by LSDs.
  • Understanding the interplay between LSDs and immune dysregulation is crucial for developing therapeutic strategies.
  • Further research is needed to elucidate the precise mechanisms connecting lysosomal dysfunction to immune system modulation in LSDs.