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Vorinostat in the acute neuroinflammatory form of X‐linked adrenoleukodystrophy
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Vorinostat in the acute neuroinflammatory form of X‐linked adrenoleukodystrophy
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Journal Article
Vorinostat in the acute neuroinflammatory form of X‐linked adrenoleukodystrophy
2020
Overview
Objective To identify a pharmacological compound targeting macrophages, the most affected immune cells in inflammatory X‐linked adrenoleukodystrophy (cerebral X‐ALD) caused by ABCD1 mutations and involved in the success of hematopoietic stem cell transplantation and gene therapy. Methods A comparative database analysis elucidated the epigenetic repressing mechanism of the related ABCD2 gene in macrophages and identified the histone deacetylase (HDAC) inhibitor Vorinostat as a compound to induce ABCD2 in these cells to compensate for ABCD1 deficiency. In these cells, we investigated ABCD2 and pro‐inflammatory gene expression, restoration of defective peroxisomal β‐oxidation activity, accumulation of very long‐chain fatty acids (VLCFAs) and their differentiation status. We investigated ABCD2 and pro‐inflammatory gene expression, restoration of defective peroxisomal ß‐oxidation activity, accumulation of very long‐chain fatty acids (VLCFA) and differentiation status. Three advanced cerebral X‐ALD patients received Vorinostat and CSF and MRI diagnostics was carried out in one patient after 80 days of treatment. Results Vorinostat improved the metabolic defects in X‐ALD macrophages by stimulating ABCD2 expression, peroxisomal ß‐oxidation, and ameliorating VLCFA accumulation. Vorinostat interfered with pro‐inflammatory skewing of X‐ALD macrophages by correcting IL12B expression and further reducing monocyte differentiation. Vorinostat normalized the albumin and immunoglobulin CSF‐serum ratios, but not gadolinium enhancement upon 80 days of treatment. Interpretation The beneficial effects of HDAC inhibitors on macrophages in X‐ALD and the improvement of the blood‐CSF/blood‐brain barrier are encouraging for future investigations. In contrast with Vorinostat, less toxic macrophage‐specific HDAC inhibitors might improve also the clinical state of X‐ALD patients with advanced inflammatory demyelination.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
Subject
/ Adrenoleukodystrophy - cerebrospinal fluid
/ Adrenoleukodystrophy - diagnostic imaging
/ Adrenoleukodystrophy - drug therapy
/ ATP Binding Cassette Transporter, Subfamily D - drug effects
/ ATP Binding Cassette Transporter, Subfamily D, Member 1 - deficiency
/ Coenzyme A Ligases - drug effects
/ DNA
/ Histone Deacetylase Inhibitors - pharmacology
/ Humans
/ Long-Chain-Fatty-Acid-CoA Ligase
/ Outcome Assessment, Health Care
/ Software
