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Peroxisome Biogenesis Disorders.

Masanori Honsho1, Kanji Okumoto2, Shigehiko Tamura3

  • 1Institute of Rheological Functions of Food, Fukuoka, Japan.

Advances in Experimental Medicine and Biology
|January 8, 2021
PubMed
Summary

Peroxisome biogenesis disorders (PBDs) arise from impaired peroxisome function. New mutations in PEX genes, identified via next-generation sequencing, offer insights into novel PBD pathogenesis through cellular and biochemical analysis.

Keywords:
CHO mutant cellsComplementation groups (CGs)Next-generation sequencingPeroxin gene PEXPeroxisomal biogenesis disorders (PBDs)Zellweger spectrum disorders (ZSDs)

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Area of Science:

  • Cell Biology
  • Biochemistry
  • Genetics

Background:

  • Peroxisomes are vital organelles in eukaryotic cells, crucial for lipid metabolism, including fatty acid beta-oxidation and plasmalogen synthesis.
  • Defects in peroxisome biogenesis, such as membrane assembly, protein import, or division, lead to Peroxisome Biogenesis Disorders (PBDs).
  • Fourteen complementation groups of PBDs have been identified, with their corresponding genes known as PEX genes.

Purpose of the Study:

  • To investigate novel mutations in peroxins (PEX genes) found in patients with mild or atypical PBD phenotypes.
  • To understand the functional consequences of these new mutations.
  • To elucidate the pathogenesis of newly identified PBD mutations.

Main Methods:

  • Next-generation sequencing (NGS) was employed to identify mutations in PEX genes.
  • Cellular analyses were performed to assess peroxisome function and morphology.
  • Biochemical assays were utilized to investigate metabolic pathway disruptions.

Main Results:

  • Several novel mutations in peroxins were identified in patients presenting with mild or previously unrelated PBD phenotypes.
  • These mutations were found to cause specific dysfunctional steps within peroxisome biogenesis or function.
  • The study provides a molecular basis for understanding these novel mutations.

Conclusions:

  • Next-generation sequencing is effective in identifying novel PBD-associated mutations.
  • Detailed cellular and biochemical analyses are essential for uncovering the pathogenic mechanisms of these mutations.
  • This research expands our understanding of the genetic basis and molecular pathology of Peroxisome Biogenesis Disorders.