Narrowing in on the causative defect of an intriguing X-Linked myopathy with excessive autophagy

B. A. Minassian, R. Aiyar, S. Alic, B. Banwell, M. Villanova, M. Fardeau, J. W. Mandell, V. C. Juel, M. Rafii, M. Auranen, H. Kalimo

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Background: X-Linked myopathy with excessive autophagy (XMEA) is a childhood-onset slowly progressive disease of skeletal muscle with no cardiac, nervous system, or other organ involvement. Pathology is distinctive: membrane-bound autophagic vacuoles, multifold reduplication of the basement membrane, and intense deposition of membrane attack complex and calcium at the myofiber surface. XMEA has been linked to the most telomeric 10.5 cM of Xq28. The authors now report identification of new families, refinement of the locus, mapping of genes to the region, and screening of candidate genes for mutations. Methods and Results: Seven new families were ascertained, including an American family with XMEA. Using 11 new microsatellite genetic markers, the authors fine-mapped a recombination in this family and a common ancestral haplotype in two French families, which localized the gene in a 4.37-Mb region. Sequence data were assembled from public and private databases and a near-continuous sequence derived for the entire region. With this sequence, a gene map of 82 genes and 28 expressed sequence tag clusters was constructed; to date, 12 candidate genes have been screened for mutations. Conclusions: This study doubles the number of reported families with XMEA and more firmly establishes its distinctive clinicopathologic features. It also advances the search for the XMEA causative defect by reducing the disease locus to approximately half its previous size, assembling an almost complete sequence of the refined region, identifying all known genes in this sequence, and excluding the presence of mutations in 10% of these genes.

Original languageEnglish (US)
Pages (from-to)596-601
Number of pages6
JournalNeurology
Volume59
Issue number4
DOIs
StatePublished - Aug 27 2002

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Genes
Mutation
Complement Membrane Attack Complex
Chromosome Mapping
Expressed Sequence Tags
Vacuoles
Myopathy, X-Linked, with Excessive Autophagy
Genetic Markers
Basement Membrane
Microsatellite Repeats
Haplotypes
Nervous System
Genetic Recombination
Skeletal Muscle
Databases
Pathology
Calcium
Membranes

ASJC Scopus subject areas

  • Clinical Neurology

Cite this

Minassian, B. A., Aiyar, R., Alic, S., Banwell, B., Villanova, M., Fardeau, M., ... Kalimo, H. (2002). Narrowing in on the causative defect of an intriguing X-Linked myopathy with excessive autophagy. Neurology, 59(4), 596-601. https://doi.org/10.1212/WNL.59.4.596

Narrowing in on the causative defect of an intriguing X-Linked myopathy with excessive autophagy. / Minassian, B. A.; Aiyar, R.; Alic, S.; Banwell, B.; Villanova, M.; Fardeau, M.; Mandell, J. W.; Juel, V. C.; Rafii, M.; Auranen, M.; Kalimo, H.

In: Neurology, Vol. 59, No. 4, 27.08.2002, p. 596-601.

Research output: Contribution to journalArticle

Minassian, BA, Aiyar, R, Alic, S, Banwell, B, Villanova, M, Fardeau, M, Mandell, JW, Juel, VC, Rafii, M, Auranen, M & Kalimo, H 2002, 'Narrowing in on the causative defect of an intriguing X-Linked myopathy with excessive autophagy', Neurology, vol. 59, no. 4, pp. 596-601. https://doi.org/10.1212/WNL.59.4.596
Minassian, B. A. ; Aiyar, R. ; Alic, S. ; Banwell, B. ; Villanova, M. ; Fardeau, M. ; Mandell, J. W. ; Juel, V. C. ; Rafii, M. ; Auranen, M. ; Kalimo, H. / Narrowing in on the causative defect of an intriguing X-Linked myopathy with excessive autophagy. In: Neurology. 2002 ; Vol. 59, No. 4. pp. 596-601.
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AU - Aiyar, R.

AU - Alic, S.

AU - Banwell, B.

AU - Villanova, M.

AU - Fardeau, M.

AU - Mandell, J. W.

AU - Juel, V. C.

AU - Rafii, M.

AU - Auranen, M.

AU - Kalimo, H.

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