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Cerebral involvement in sitosterolemia.

Fangjun Li1,2, Xufang Xie1, Shan Xu3

  • 1Department of Neurology, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Yong Wai Zheng Street 17#, Nanchang, 330006, Jiangxi, P.R. China.

Lipids in Health and Disease
|July 22, 2024
PubMed
Summary

Sitosterolemia, a plant sterol metabolism disorder, can cause brain damage due to cholesterol crystal deposition. This study identifies new neurological symptoms and pathological findings in affected individuals.

Keywords:
ABCG5Neurological impairmentPlant sterolsSitosterolemiaXanthoma

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Area of Science:

  • Genetics and Molecular Biology
  • Neurology
  • Metabolic Disorders

Background:

  • Sitosterolemia is an autosomal recessive disorder affecting plant sterol metabolism.
  • Clinical manifestations include xanthoma, premature atherosclerosis, and arthritis, but brain damage is poorly understood.

Purpose of the Study:

  • To investigate previously unreported neurological aspects of sitosterolemia.
  • To characterize the brain damage associated with sitosterolemia through clinical, imaging, and pathological analysis.

Main Methods:

  • Focused on a family with two sitosterolemia patients.
  • Utilized radiological examinations, brain biopsies, whole-exome sequencing (WES), and plant sterol level testing.

Main Results:

  • The index patient presented with lower limb weakness, incontinence, and brain lesions with cholesterol crystal deposition.
  • Whole-exome sequencing identified compound heterozygous variants in ABCG5 in affected individuals.
  • Pathology revealed cholesterol crystals and lymphocyte infiltration in brain lesions.

Conclusions:

  • Sitosterolemia can lead to significant neurological impairment and brain damage.
  • Cholesterol crystals may deposit in cerebral connective tissues via blood circulation.
  • This study expands the understanding of sitosterolemia's clinical spectrum.