Open Access

Clinical characteristics and phenotype distribution in 10 Chinese patients with X‑linked adrenoleukodystrophy

  • Authors:
    • Ming‑Rui Jia
    • Wen‑Zhen Wu
    • Chuan‑Ming Li
    • Xiao‑Hui Cai
    • Lin Zhang
    • Fang Yan
    • Chan Zhu
    • Ming‑Hong Gu
  • View Affiliations

  • Published online on: July 24, 2019     https://doi.org/10.3892/etm.2019.7804
  • Pages: 1945-1952
  • Copyright: © Jia et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

X‑linked adrenoleukodystrophy (X‑ALD) is the most frequent type of inherited demyelinating peroxisomal disease caused by mutations in the ATP binding cassette subfamily D member 1 (ABCD1) gene. The rate of early recognition and genetic diagnosis of X‑ALD remains low due to its variable clinical manifestations. The present study summarized the clinical features Chinese X‑ALD patients and performed a follow‑up study to further precisely characterize this disease. A total of 10 patients diagnosed with X‑ALD between 1994 and 2016 at Shandong Provincial Hospital Affiliated to Shandong University (Jinan, China) were included in the present study. Through reviewing their medical records and performing telephone follow‑ups, the clinical features, biochemical laboratory data, brain images, treatments and long‑term outcomes were retrospectively summarized. Mutation analysis of the ABCD1 gene was performed in certain patients. Most of the patients (8/10) had the childhood cerebral form of X‑ALD. One patient presented with the olivo‑ponto‑cerebellar form, the rarest form of X‑ALD. In all patients, brain magnetic resonance images revealed abnormalities with typical T2‑weighted hyperintensity. Analysis of very long chain fatty acid revealed high plasma levels of hexacosanoic acid in all patients. Increased adrenocorticotropic hormone, decreased cortisol and neurophysiological manifestations were also observed. Three different mutations of the ABCD1 gene were identified in the 3 patients subjected to genotyping. During the follow‑ups, most patients took neurotrophic drugs and received hydrocortisone replacement when required. One patient received a hematopoietic stem cell transplantation, but died 1 year following the transplantation. Chronic myelopathy and peripheral neuropathy progressed with time, gradually leading to a vegetative state or paralysis within several years of clinical symptom onset. In conclusion, male patients with adrenocortical insufficiency should be further investigated for X‑ALD. Early detection is critical to prevent the progression of X‑ALD with mutation analysis of ABCD1 the most accurate method to confirm diagnosis.

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September 2019
Volume 18 Issue 3

Print ISSN: 1792-0981
Online ISSN:1792-1015

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Copy and paste a formatted citation
APA
Jia, M., Wu, W., Li, C., Cai, X., Zhang, L., Yan, F. ... Gu, M. (2019). Clinical characteristics and phenotype distribution in 10 Chinese patients with X‑linked adrenoleukodystrophy. Experimental and Therapeutic Medicine, 18, 1945-1952. https://doi.org/10.3892/etm.2019.7804
MLA
Jia, M., Wu, W., Li, C., Cai, X., Zhang, L., Yan, F., Zhu, C., Gu, M."Clinical characteristics and phenotype distribution in 10 Chinese patients with X‑linked adrenoleukodystrophy". Experimental and Therapeutic Medicine 18.3 (2019): 1945-1952.
Chicago
Jia, M., Wu, W., Li, C., Cai, X., Zhang, L., Yan, F., Zhu, C., Gu, M."Clinical characteristics and phenotype distribution in 10 Chinese patients with X‑linked adrenoleukodystrophy". Experimental and Therapeutic Medicine 18, no. 3 (2019): 1945-1952. https://doi.org/10.3892/etm.2019.7804