Cited by 60dental development and anomaliesHair Growth and DisordersGenetic and rare skin diseases.

Mutations in TSPEAR, Encoding a Regulator of Notch Signaling, Affect Tooth and Hair Follicle Morphogenesis

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Peled, Alon, Sarig, Ofer, Samuelov, Liat, Bertolini, Marta, Ziv, Limor, Weissglas-Volkov, Daphna, Eskin-Schwartz, Marina, Adase, Christopher A. +16 more·2016·PLOS Genetics

Abstract

Despite recent advances in our understanding of the pathogenesis of ectodermal dysplasias (EDs), the molecular basis of many of these disorders remains unknown. In the present study, we aimed at elucidating the genetic basis of a new form of ED featuring facial dysmorphism, scalp hypotrichosis and hypodontia. Using whole exome sequencing, we identified 2 frameshift and 2 missense mutations in TSPEAR segregating with the disease phenotype in 3 families. TSPEAR encodes the thrombospondin-type laminin G domain and EAR repeats (TSPEAR) protein, whose function is poorly understood. TSPEAR knock-down resulted in altered expression of genes known to be regulated by NOTCH and to be involved in murine hair and tooth development. Pathway analysis confirmed that down-regulation of TSPEAR in keratinocytes is likely to affect Notch signaling. Accordingly, using a luciferase-based reporter assay, we showed that TSPEAR knock-down is associated with decreased Notch signaling. In addition, NOTCH1 protein expression was reduced in patient scalp skin. Moreover, TSPEAR silencing in mouse hair follicle organ cultures was found to induce apoptosis in follicular epithelial cells, resulting in decreased hair bulb diameter. Collectively, these observations indicate that TSPEAR plays a critical, previously unrecognized role in human tooth and hair follicle morphogenesis through regulation of the Notch signaling pathway.

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Authors
Peled, A., Sarig, O., Samuelov, L., Bertolini, M., Ziv, L., Weissglas-Volkov, D., Eskin-Schwartz, M., Adase, C. A., Malchin, N., Bochner, R., Fainberg, G., Goldberg, I., Sugawara, K., Baniel, A., Tsuruta, D., Luxenburg, C., Adir, N., Duverger, O., Morasso, M., Shalev, S., Gallo, R. L., Shomron, N., Paus, R., & Sprecher, E.
Affiliations
  • Tel Aviv University (IL)
  • Tel Aviv Sourasky Medical Center (IL)
  • University of Münster (DE)
  • Sheba Medical Center (IL)
  • University of California San Diego (US)
  • Osaka City University (JP)
  • Technion – Israel Institute of Technology (IL)
  • National Institutes of Health (US)
Corresponding author
Sprecher, Eli
Venue
PLOS Genetics
Published
2016-10-13
Volume
12
Issue
10
Pages
e1006369
ISSN
  • 1553-7390 (ISSN-L)
  • 1553-7404
OpenAlex
W2529974075
Cited by
55
References
44
Citations by year
2026: 2 · 2025: 8 · 2024: 8 · 2023: 7 · 2022: 12 · 2021: 4 · 2020: 2 · 2019: 4 · 2018: 5 · 2017: 3
FWCI
2.08
Type
journal article
Language
en
Open access
Locations
  • PLoS Genetics (publishedVersion, public-domain)
  • PubMed Central (publishedVersion, public-domain)
  • PubMed (publishedVersion)
  • Research Explorer (The University of Manchester) (publishedVersion, public-domain)
  • eScholarship (California Digital Library) (submittedVersion, public-domain)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • eScholarship (California Digital Library) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
  • Donation of Israel and Ruth Ram
  • Center for Nanoscience and Nanotechnology at Tel-Aviv University
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › dental development and anomalies
  • Health Sciences › Medicine › Urology › Hair Growth and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and rare skin diseases.
Keywords
ectodermal dysplasia, Notch signaling, tooth morphogenesis, hair follicle morphogenesis, tooth agenesis, facial dysmorphism, Notch1, keratinocytes, hair follicle organ culture, genetic mutations
MeSH terms
Animals, Cell Differentiation, DNA Mutational Analysis, Ectodermal Dysplasia, Humans, Morphogenesis, Pedigree, Proteins, Tooth, Signal Transduction, Frameshift Mutation, Gene Expression Regulation, Developmental, Hair Follicle, Mice, Receptor, Notch1

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