Identification of the first dominant mutation of LAMA5 gene causing a complex multisystem syndrome due to dysfunction of the extracellular matrix

Simone Sampaolo, Filomena Napolitano, Alfonsina Tirozzi, Mafalda Giovanna Reccia, Luca Lombardi, Olimpia Farina, Adriano Barra, Ferdinando Cirillo, Mariarosa Anna Beatrice Melone, Fernando Gianfrancesco, Giuseppe Di Iorio, Teresa Esposito

Research output: Contribution to journalArticle

Abstract

BACKGROUND: The laminin alpha 5 gene (LAMA5) plays a master role in the maintenance and function of the extracellular matrix (ECM) in mammalian tissues, which is critical in developmental patterning, stem cell niches, cancer and genetic diseases. Its mutations have never been reported in human disease so far. The aim of this study was to associate the first mutation in LAMA5 gene to a novel multisystem syndrome.

METHODS: A detailed characterisation of a three-generation family, including clinical, biochemical, instrumental and morphological analysis, together with genetics and expression (WES and RNAseq) studies, was performed.

RESULTS: The heterozygous LAMA5 mutation c.9418G>A (p.V3140M) was associated with skin anomalies, impaired scarring, night blindness, muscle weakness, osteoarthritis, joint and internal organs ligaments laxity, malabsorption syndrome and hypothyroidism. We demonstrated that the mutation alters the amount of LAMA5 peptides likely derived from protein cleavage and perturbs the activation of the epithelial-mesenchymal signalling, producing an unbalanced expression of Sonic hedgehog and GLI1, which are upregulated in cells from affected individuals, and of ECM proteins (COL1A1, MMP1 and MMP3), which are strongly inhibited. Studies carried out using human skin biopsies showed alteration of dermal papilla with a reduction of the germinative layer and an early arrest of hair follicle downgrowth. The knock-in mouse model, generated in our laboratory, shows similar changes in the tissues studied so far.

CONCLUSIONS: This is the first report of a disease phenotype associated with LAMA5 mutation in humans.

Original languageEnglish
Pages (from-to)710-720
Number of pages11
JournalJournal of Medical Genetics
Volume54
Issue number10
DOIs
Publication statusPublished - Oct 2017

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Extracellular Matrix
Mutation
Genes
Skin
Night Blindness
Malabsorption Syndromes
Stem Cell Niche
Inborn Genetic Diseases
Hedgehogs
Hair Follicle
Extracellular Matrix Proteins
Muscle Weakness
Hypothyroidism
Ligaments
Osteoarthritis
Cicatrix
laminin alpha5
Joints
Maintenance
Phenotype

Keywords

  • Journal Article

Cite this

Identification of the first dominant mutation of LAMA5 gene causing a complex multisystem syndrome due to dysfunction of the extracellular matrix. / Sampaolo, Simone; Napolitano, Filomena; Tirozzi, Alfonsina; Reccia, Mafalda Giovanna; Lombardi, Luca; Farina, Olimpia; Barra, Adriano; Cirillo, Ferdinando; Melone, Mariarosa Anna Beatrice; Gianfrancesco, Fernando; Iorio, Giuseppe Di; Esposito, Teresa.

In: Journal of Medical Genetics, Vol. 54, No. 10, 10.2017, p. 710-720.

Research output: Contribution to journalArticle

Sampaolo, S, Napolitano, F, Tirozzi, A, Reccia, MG, Lombardi, L, Farina, O, Barra, A, Cirillo, F, Melone, MAB, Gianfrancesco, F, Iorio, GD & Esposito, T 2017, 'Identification of the first dominant mutation of LAMA5 gene causing a complex multisystem syndrome due to dysfunction of the extracellular matrix', Journal of Medical Genetics, vol. 54, no. 10, pp. 710-720. https://doi.org/10.1136/jmedgenet-2017-104555
Sampaolo, Simone ; Napolitano, Filomena ; Tirozzi, Alfonsina ; Reccia, Mafalda Giovanna ; Lombardi, Luca ; Farina, Olimpia ; Barra, Adriano ; Cirillo, Ferdinando ; Melone, Mariarosa Anna Beatrice ; Gianfrancesco, Fernando ; Iorio, Giuseppe Di ; Esposito, Teresa. / Identification of the first dominant mutation of LAMA5 gene causing a complex multisystem syndrome due to dysfunction of the extracellular matrix. In: Journal of Medical Genetics. 2017 ; Vol. 54, No. 10. pp. 710-720.
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T1 - Identification of the first dominant mutation of LAMA5 gene causing a complex multisystem syndrome due to dysfunction of the extracellular matrix

AU - Sampaolo, Simone

AU - Napolitano, Filomena

AU - Tirozzi, Alfonsina

AU - Reccia, Mafalda Giovanna

AU - Lombardi, Luca

AU - Farina, Olimpia

AU - Barra, Adriano

AU - Cirillo, Ferdinando

AU - Melone, Mariarosa Anna Beatrice

AU - Gianfrancesco, Fernando

AU - Iorio, Giuseppe Di

AU - Esposito, Teresa

N1 - © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

PY - 2017/10

Y1 - 2017/10

N2 - BACKGROUND: The laminin alpha 5 gene (LAMA5) plays a master role in the maintenance and function of the extracellular matrix (ECM) in mammalian tissues, which is critical in developmental patterning, stem cell niches, cancer and genetic diseases. Its mutations have never been reported in human disease so far. The aim of this study was to associate the first mutation in LAMA5 gene to a novel multisystem syndrome.METHODS: A detailed characterisation of a three-generation family, including clinical, biochemical, instrumental and morphological analysis, together with genetics and expression (WES and RNAseq) studies, was performed.RESULTS: The heterozygous LAMA5 mutation c.9418G>A (p.V3140M) was associated with skin anomalies, impaired scarring, night blindness, muscle weakness, osteoarthritis, joint and internal organs ligaments laxity, malabsorption syndrome and hypothyroidism. We demonstrated that the mutation alters the amount of LAMA5 peptides likely derived from protein cleavage and perturbs the activation of the epithelial-mesenchymal signalling, producing an unbalanced expression of Sonic hedgehog and GLI1, which are upregulated in cells from affected individuals, and of ECM proteins (COL1A1, MMP1 and MMP3), which are strongly inhibited. Studies carried out using human skin biopsies showed alteration of dermal papilla with a reduction of the germinative layer and an early arrest of hair follicle downgrowth. The knock-in mouse model, generated in our laboratory, shows similar changes in the tissues studied so far.CONCLUSIONS: This is the first report of a disease phenotype associated with LAMA5 mutation in humans.

AB - BACKGROUND: The laminin alpha 5 gene (LAMA5) plays a master role in the maintenance and function of the extracellular matrix (ECM) in mammalian tissues, which is critical in developmental patterning, stem cell niches, cancer and genetic diseases. Its mutations have never been reported in human disease so far. The aim of this study was to associate the first mutation in LAMA5 gene to a novel multisystem syndrome.METHODS: A detailed characterisation of a three-generation family, including clinical, biochemical, instrumental and morphological analysis, together with genetics and expression (WES and RNAseq) studies, was performed.RESULTS: The heterozygous LAMA5 mutation c.9418G>A (p.V3140M) was associated with skin anomalies, impaired scarring, night blindness, muscle weakness, osteoarthritis, joint and internal organs ligaments laxity, malabsorption syndrome and hypothyroidism. We demonstrated that the mutation alters the amount of LAMA5 peptides likely derived from protein cleavage and perturbs the activation of the epithelial-mesenchymal signalling, producing an unbalanced expression of Sonic hedgehog and GLI1, which are upregulated in cells from affected individuals, and of ECM proteins (COL1A1, MMP1 and MMP3), which are strongly inhibited. Studies carried out using human skin biopsies showed alteration of dermal papilla with a reduction of the germinative layer and an early arrest of hair follicle downgrowth. The knock-in mouse model, generated in our laboratory, shows similar changes in the tissues studied so far.CONCLUSIONS: This is the first report of a disease phenotype associated with LAMA5 mutation in humans.

KW - Journal Article

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DO - 10.1136/jmedgenet-2017-104555

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VL - 54

SP - 710

EP - 720

JO - Journal of Medical Genetics

JF - Journal of Medical Genetics

SN - 0022-2593

IS - 10

ER -