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Extracellular Matrix Protein 1 Gene Mutation in Turkish Patients with Lipoid Proteinosis.

ABSTRACT: Background:Lipoid proteinosis (LP) is a rare autosomal recessive genodermatosis characterized by mucocutaneous lesions and hoarseness of voice that develop in early childhood. LP is caused by mutation in the extracellular matrix protein 1 (ECM1) gene, which is located on 1q21.2. Aims:This study aimed to present the profile of ECM1 gene mutations and to identify possible novel mutations specific to Turkey. Materials and Methods:The ECM1 gene mutations of 19 LP patients from five families were evaluated using DNA isolated from peripheral blood samples. All ten exons in the ECM1 gene region were amplified by polymerase chain reaction (PCR). The PCR products were analyzed using a DNA sequencing analyzer. The results of DNA sequencing were analyzed with bioinformatics methods. Results:of the 19 LP patients evaluated in our study, we detected defects in exon 6 (c.507delT, 658T>G), exon 9 (157C>T, 727C>T), and exon 10 (c.93_94delGCinsTT) of the ECM1 gene. Conclusions:Our results indicate that defects in exons 6, 9, and 10 of the ECM1 gene were responsible for LP in our country. The identification of these pathogenic mutations is valuable because it facilitates early diagnosis and genetic counseling.

SUBMITTER: Dertlioglu SB

PROVIDER: S-EPMC6862362 | biostudies-literature | 2019 Nov-Dec

REPOSITORIES: biostudies-literature

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Extracellular Matrix Protein 1 Gene Mutation in Turkish Patients with Lipoid Proteinosis.

Dertlioğlu Selma Bakar SB Edgünlü Tuba Gökdoğan TG Şen Deniz Erol DE Süzek Tuğba Önal TÖ

Indian journal of dermatology 20191101 6

<h4>Background</h4>Lipoid proteinosis (LP) is a rare autosomal recessive genodermatosis characterized by mucocutaneous lesions and hoarseness of voice that develop in early childhood. LP is caused by mutation in the extracellular matrix protein 1 (<i>ECM1</i>) gene, which is located on 1q21.2.<h4>Aims</h4>This study aimed to present the profile of <i>ECM1</i> gene mutations and to identify possible novel mutations specific to Turkey.<h4>Materials and methods</h4>The <i>ECM1</i> gene mutations of ...[more]

PMID: 31896839

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Project description:BACKGROUND: Lipoid proteinosis is a rare autosomal recessive disease characterized by cutaneous and mucosal lesions and hoarseness appearing in early childhood. It is caused by homozygous or compound heterozygous mutations in the ECM1 gene. The disease is largely uncharacterized in Arab population and the mutation(s) spectrum in the Arab population is largely unknown. We report the neurologic and neuroradiologic characteristics and ECM1 gene mutations of seven individuals with lipoid proteinosis (LP) from three unrelated consanguineous families. METHODS: Clinical, neurologic, and neuro-ophthalmologic examinations; skin histopathology; brain CT and MRI; and sequencing of the fullECM1 gene. RESULTS: All seven affected individuals had skin scarring and hoarseness from early childhood. The two children in Family 1 had worse skin involvement and worse hoarseness than affected children of Families 2 and 3. Both children in Family 1 were modestly mentally retarded, and one had typical calcifications of the amygdalae on CT scan. Affected individuals in Families 2 and 3 had no grossneurologic, neurodevelopmental, or neuroimaging abnormalities. Skin histopathology was compatible with LP in all three families. Sequencing the full coding region of ECM1 gene revealed two novel mutationsin Family 1 (c.1300-1301delAA) and Family 2 (p.Cys269Tyr) and in Family 3 a previously described 1163 bp deletion starting 34 bp into intron 8. CONCLUSIONS: These individuals illustrate the neurologic spectrum of LP, including variable mental retardation, personality changes, and mesial temporal calcificationand imply that significant neurologic involvement may be somewhat less common than previously thought. The cause of neurologic abnormalities was not clear from either neuroimaging or from what is known about ECM1 function. The severity of dermatologic abnormalities and hoarseness generally correlated with neurologic abnormalities, with Family 1 being somewhat more affected in all spheres than the other two families. Nevertheless, phenotype-genotype correlation was not obvious, possibly because of difficulty quantifying the neurologic phenotype and because of genetic complexity.

Dataset Information

Extracellular Matrix Protein 1 Gene Mutation in Turkish Patients with Lipoid Proteinosis.

Publications

Extracellular Matrix Protein 1 Gene Mutation in Turkish Patients with Lipoid Proteinosis.

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