Expanding the clinical and mutational spectrum of B4GALT7-spondylodysplastic Ehlers-Danlos syndrome
Identifieur interne : 000A73 ( Pmc/Curation ); précédent : 000A72; suivant : 000A74Expanding the clinical and mutational spectrum of B4GALT7-spondylodysplastic Ehlers-Danlos syndrome
Auteurs : Marco Ritelli [Italie] ; Chiara Dordoni [Italie] ; Valeria Cinquina [Italie] ; Marina Venturini [Italie] ; Piergiacomo Calzavara-Pinton [Italie] ; Marina Colombi [Italie]Source :
- Orphanet Journal of Rare Diseases [ 1750-1172 ] ; 2017.
Abstract
Spondylodysplastic EDS (spEDS) is a rare connective tissue disorder that groups the phenotypes caused by biallelic
Herein, we report on a 30-year-old Moroccan woman who fitted the minimal criteria to suspect spEDS, but lacked radioulnar synostosis and intellectual disability and presented with neurosensorial hearing loss and limb edema of lymphatic origin. Sanger sequencing of
Our findings expand both the clinical and mutational spectrum of this ultrarare connective tissue disorder. The comparison of the patient’s features with those of the other spEDS and Larsen of Reunion Island syndrome patients reported up to now offers future perspectives for spEDS nosology and clinical research in this field.
Url:
DOI: 10.1186/s13023-017-0704-3
PubMed: 28882145
PubMed Central: 5590203
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Expanding the clinical and mutational spectrum of <italic>B4GALT7</italic>
-spondylodysplastic Ehlers-Danlos syndrome</title>
<author><name sortKey="Ritelli, Marco" sort="Ritelli, Marco" uniqKey="Ritelli M" first="Marco" last="Ritelli">Marco Ritelli</name>
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<author><name sortKey="Dordoni, Chiara" sort="Dordoni, Chiara" uniqKey="Dordoni C" first="Chiara" last="Dordoni">Chiara Dordoni</name>
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<author><name sortKey="Colombi, Marina" sort="Colombi, Marina" uniqKey="Colombi M" first="Marina" last="Colombi">Marina Colombi</name>
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<series><title level="j">Orphanet Journal of Rare Diseases</title>
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<front><div type="abstract" xml:lang="en"><sec><title>Background</title>
<p id="Par1">Spondylodysplastic EDS (spEDS) is a rare connective tissue disorder that groups the phenotypes caused by biallelic <italic>B4GALT7</italic>
, <italic>B3GALT6,</italic>
and <italic>SLC39A13</italic>
mutations. In the 2017 EDS nosology, minimal criteria (general and gene-specific) for a clinical suspicion of spEDS have been proposed, but molecular analysis is required to reach a definite diagnosis. The majority of spEDS patients presented with short stature, skin hyperextensibility, facial dysmorphisms, peculiar radiological findings, muscle hypotonia and joint laxity and/or its complications. To date only 7 patients with β4GALT7-deficiency (spEDS-<italic>B4GALT7</italic>
) have been described and their clinical data suggested that, in addition to short stature and muscle hypotonia, radioulnar synostosis, hypermetropia, and delayed cognitive development might be a hallmark of this specific type of spEDS. Additional 22 patients affected with an overlapping phenotype, i.e., Larsen of Reunion Island syndrome, all carrying a homozygous <italic>B4GALT7</italic>
mutation, are also recognized.</p>
</sec>
<sec><title>Results</title>
<p id="Par2">Herein, we report on a 30-year-old Moroccan woman who fitted the minimal criteria to suspect spEDS, but lacked radioulnar synostosis and intellectual disability and presented with neurosensorial hearing loss and limb edema of lymphatic origin. Sanger sequencing of <italic>B4GALT7</italic>
was performed since the evaluation of the spEDS gene-specific minor criteria suggested this specific subtype. Mutational screening revealed the homozygous c.829G>T, p.Glu277* pathogenetic variant leading to aberrant splicing.</p>
</sec>
<sec><title>Conclusions</title>
<p id="Par3">Our findings expand both the clinical and mutational spectrum of this ultrarare connective tissue disorder. The comparison of the patient’s features with those of the other spEDS and Larsen of Reunion Island syndrome patients reported up to now offers future perspectives for spEDS nosology and clinical research in this field.</p>
</sec>
</div>
</front>
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<journal-id journal-id-type="iso-abbrev">Orphanet J Rare Dis</journal-id>
<journal-title-group><journal-title>Orphanet Journal of Rare Diseases</journal-title>
</journal-title-group>
<issn pub-type="epub">1750-1172</issn>
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<publisher-loc>London</publisher-loc>
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<article-id pub-id-type="publisher-id">704</article-id>
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<article-categories><subj-group subj-group-type="heading"><subject>Letter to the Editor</subject>
</subj-group>
</article-categories>
<title-group><article-title>Expanding the clinical and mutational spectrum of <italic>B4GALT7</italic>
-spondylodysplastic Ehlers-Danlos syndrome</article-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>Ritelli</surname>
<given-names>Marco</given-names>
</name>
<address><email>marco.ritelli@unibs.it</email>
</address>
<xref ref-type="aff" rid="Aff1">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Dordoni</surname>
<given-names>Chiara</given-names>
</name>
<address><email>chiara.dordoni@unibs.it</email>
</address>
<xref ref-type="aff" rid="Aff1">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Cinquina</surname>
<given-names>Valeria</given-names>
</name>
<address><email>v.cinquina@studenti.unibs.it</email>
</address>
<xref ref-type="aff" rid="Aff1">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Venturini</surname>
<given-names>Marina</given-names>
</name>
<address><email>marina.venturini@unibs.it</email>
</address>
<xref ref-type="aff" rid="Aff2">2</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Calzavara-Pinton</surname>
<given-names>Piergiacomo</given-names>
</name>
<address><email>piergiacomo.calzavarapinton@unibs.it</email>
</address>
<xref ref-type="aff" rid="Aff2">2</xref>
</contrib>
<contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">http://orcid.org/0000-0002-3105-5990</contrib-id>
<name><surname>Colombi</surname>
<given-names>Marina</given-names>
</name>
<address><phone>+39 030 3717265</phone>
<email>marina.colombi@unibs.it</email>
</address>
<xref ref-type="aff" rid="Aff1">1</xref>
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<aff id="Aff1"><label>1</label>
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<institution>Division of Biology and Genetics, Department of Molecular and Translational Medicine,</institution>
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Viale Europa 11, 25123 Brescia, Italy</aff>
<aff id="Aff2"><label>2</label>
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<pub-date pub-type="epub"><day>7</day>
<month>9</month>
<year>2017</year>
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<pub-date pub-type="pmc-release"><day>7</day>
<month>9</month>
<year>2017</year>
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<pub-date pub-type="collection"><year>2017</year>
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<volume>12</volume>
<elocation-id>153</elocation-id>
<history><date date-type="received"><day>19</day>
<month>6</month>
<year>2017</year>
</date>
<date date-type="accepted"><day>30</day>
<month>8</month>
<year>2017</year>
</date>
</history>
<permissions><copyright-statement>© The Author(s). 2017</copyright-statement>
<license license-type="OpenAccess"><license-p><bold>Open Access</bold>
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/4.0/">http://creativecommons.org/licenses/by/4.0/</ext-link>
), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/publicdomain/zero/1.0/">http://creativecommons.org/publicdomain/zero/1.0/</ext-link>
) applies to the data made available in this article, unless otherwise stated.</license-p>
</license>
</permissions>
<abstract id="Abs1"><sec><title>Background</title>
<p id="Par1">Spondylodysplastic EDS (spEDS) is a rare connective tissue disorder that groups the phenotypes caused by biallelic <italic>B4GALT7</italic>
, <italic>B3GALT6,</italic>
and <italic>SLC39A13</italic>
mutations. In the 2017 EDS nosology, minimal criteria (general and gene-specific) for a clinical suspicion of spEDS have been proposed, but molecular analysis is required to reach a definite diagnosis. The majority of spEDS patients presented with short stature, skin hyperextensibility, facial dysmorphisms, peculiar radiological findings, muscle hypotonia and joint laxity and/or its complications. To date only 7 patients with β4GALT7-deficiency (spEDS-<italic>B4GALT7</italic>
) have been described and their clinical data suggested that, in addition to short stature and muscle hypotonia, radioulnar synostosis, hypermetropia, and delayed cognitive development might be a hallmark of this specific type of spEDS. Additional 22 patients affected with an overlapping phenotype, i.e., Larsen of Reunion Island syndrome, all carrying a homozygous <italic>B4GALT7</italic>
mutation, are also recognized.</p>
</sec>
<sec><title>Results</title>
<p id="Par2">Herein, we report on a 30-year-old Moroccan woman who fitted the minimal criteria to suspect spEDS, but lacked radioulnar synostosis and intellectual disability and presented with neurosensorial hearing loss and limb edema of lymphatic origin. Sanger sequencing of <italic>B4GALT7</italic>
was performed since the evaluation of the spEDS gene-specific minor criteria suggested this specific subtype. Mutational screening revealed the homozygous c.829G>T, p.Glu277* pathogenetic variant leading to aberrant splicing.</p>
</sec>
<sec><title>Conclusions</title>
<p id="Par3">Our findings expand both the clinical and mutational spectrum of this ultrarare connective tissue disorder. The comparison of the patient’s features with those of the other spEDS and Larsen of Reunion Island syndrome patients reported up to now offers future perspectives for spEDS nosology and clinical research in this field.</p>
</sec>
</abstract>
<kwd-group xml:lang="en"><title>Keywords</title>
<kwd>Spondylodysplastic Ehlers-Danlos syndrome</kwd>
<kwd><italic>B4GALT7</italic>
</kwd>
<kwd>Larsen of Reunion Island syndrome</kwd>
<kwd>Linkerophaties</kwd>
</kwd-group>
<custom-meta-group><custom-meta><meta-name>issue-copyright-statement</meta-name>
<meta-value>© The Author(s) 2017</meta-value>
</custom-meta>
</custom-meta-group>
</article-meta>
</front>
</pmc>
</record>
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