Cited by 123Complement system in diseasesOral microbiology and periodontitis researchOral and gingival health research

Periodontal Ehlers-Danlos Syndrome Is Caused by Mutations in C1R and C1S , which Encode Subcomponents C1r and C1s of Complement

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Kapferer-Seebacher, Ines, Pepin, Melanie, Werner, Roland, Aitman, Timothy J., Nordgren, Ann, Stoiber, Heribert, Thielens, Nicole, Gaboriaud, Christine +47 more·2016·The American Journal of Human Genetics

Abstract

Periodontal Ehlers-Danlos syndrome (pEDS) is an autosomal-dominant disorder characterized by early-onset periodontitis leading to premature loss of teeth, joint hypermobility, and mild skin findings. A locus was mapped to an approximately 5.8 Mb region at 12p13.1 but no candidate gene was identified. In an international consortium we recruited 19 independent families comprising 107 individuals with pEDS to identify the locus, characterize the clinical details in those with defined genetic causes, and try to understand the physiological basis of the condition. In 17 of these families, we identified heterozygous missense or in-frame insertion/deletion mutations in C1R (15 families) or C1S (2 families), contiguous genes in the mapped locus that encode subunits C1r and C1s of the first component of the classical complement pathway. These two proteins form a heterotetramer that then combines with six C1q subunits. Pathogenic variants involve the subunit interfaces or inter-domain hinges of C1r and C1s and are associated with intracellular retention and mild endoplasmic reticulum enlargement. Clinical features of affected individuals in these families include rapidly progressing periodontitis with onset in the teens or childhood, a previously unrecognized lack of attached gingiva, pretibial hyperpigmentation, skin and vascular fragility, easy bruising, and variable musculoskeletal symptoms. Our findings open a connection between the inflammatory classical complement pathway and connective tissue homeostasis.

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Crossref · 10.1016/j.ajhg.2016.08.019

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  • In 93 individuals with C1R or C1S mutations reported by Kapferer-Seebacher et al. [2016], joint hypermobility was reported in 56% of patients, mostly affecting the fingers (30%), the elbows (19%), knees (11%), hips, wrist, and ankle (3%).

    “In 93 individuals with C1R or C1S mutations reported by Kapferer-Seebacher et al. [2016] joint hypermobility was reported in 56% of patients, mostly affecting the fingers (30%), the elbows (19%), knees (11%), hips, wrist, and ankle (3%).”

    From The Ehlers–Danlos syndromes, rare types (2017) · cites this paper as Kapferer-Seebacher et al., 2016

    The Results section, “Clinical Characteristics of Periodontal EDS” (page not provided), reports joint hypermobility in 44% of affected individuals, not 56%. It says hypermobility was often limited to small joints but does not give the claimed percentages for specific joints. (LLM, conf=0.90)

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  • Marfanoid habitus, scoliosis, osteoarthritis, flat feet, and hernia were not consistent features in pEDS.

    “Marfanoid habitus, scoliosis, osteoarthritis, flat feet, and hernia were not consistent features [Kapferer-Seebacher et al., 2016].”

    From The Ehlers–Danlos syndromes, rare types (2017) · cites this paper as Kapferer-Seebacher et al., 2016

    The Results section (Clinical Characteristics of Periodontal EDS; page unavailable) says that scoliosis and pes planus (flat feet) were rare, supporting their description as inconsistent features. Our copy does not establish the same point for marfanoid habitus, osteoarthritis, or hernia. (LLM, conf=0.84)

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  • Atrophic scars were present in 50% of pEDS cases with C1R or C1S mutations.

    “Atrophic scars were present in 50% of cases [Kapferer-Seebacher et al., 2016].”

    From The Ehlers–Danlos syndromes, rare types (2017) · cites this paper as Kapferer-Seebacher et al., 2016

    The Results section (Clinical Characteristics of Periodontal EDS; page unavailable) reports that 50% of affected individuals had abnormal scars, defined as atrophic or wide. It does not report that 50% had atrophic scars specifically. (LLM, conf=0.90)

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  • Kapferer-Seebacher et al. [2016] reported a prevalence of 16% for vascular complications (cerebral aneurisms or aortic dissection), and one individual with three events of organ rupture (once duodenum, twice lung).

    “Kapferer-Seebacher et al. [2016] reported a prevalence of 16% for vascular complications (cerebral aneurisms or aortic dissection), and one individual with three events of organ rupture (once duodenum, twice lung).”

    From The Ehlers–Danlos syndromes, rare types (2017) · cites this paper as Kapferer-Seebacher et al., 2016

    The Results (Clinical Characteristics of Periodontal EDS; page unavailable) report a history of aneurysms in 16% of affected individuals, four cerebral aneurysm cases, and two deaths after aortic dissection. The Introduction mentions arterial or gastrointestinal ruptures, but our copy does not substantiate the claim that one individual had three organ-rupture events involving the duodenum and lungs. (LLM, conf=0.86)

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  • Heterozygous missense or in-frame insertion/deletion variants in C1R were detected in 15 families (comprising 76 affected individuals), and heterozygous missense or in-frame insertion/deletion variants in C1S were detected in two families (comprising 16 affected individuals).

    “Heterozygous missense or in-frame insertion/deletion variants in C1R were detected in 15 families (comprising 76 affected individuals), and heterozygous missense or in-frame insertion/ deletion variants in C1S were detected in two families (comprising 16 affected individuals).”

    From The Ehlers–Danlos syndromes, rare types (2017) · cites this paper as Kapferer-Seebacher et al., 2016

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  1. [25]Thielens N.M. Villiers M.B. Reboul A. Villiers C.L. Colomb M.G. Human complement subcomponent C2: purification and proteolytic cleavage in fluid phase by C1s, C1r2-C1s2 and C1 FEBS Lett. 141 1982 19 24 6282646

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Authors
Kapferer-Seebacher, I., Pepin, M., Werner, R., Aitman, T. J., Nordgren, A., Stoiber, H., Thielens, N., Gaboriaud, C., Amberger, A., Schossig, A., Gruber, R., Giunta, C., Bamshad, M., Björck, E., Chen, C., Chitayat, D., Dorschner, M., Schmitt-Egenolf, M., Hale, C. J., Hanna, D., Hennies, H. C., Heiss-Kisielewsky, I., Lindstrand, A., Lundberg, P., Mitchell, A. L., Nickerson, D. A., Reinstein, E., Rohrbach, M., Romani, N., Schmuth, M., Silver, R., Taylan, F., Vandersteen, A., Vandrovcova, J., Weerakkody, R., Yang, M., Pope, F. M., Byers, P. H., Zschocke, J., Aleck, K., Banki, Z., Dudas, J., Dumfahrt, H., Haririan, H., Hartsfield, J. K., Kagen, C. N., Lindert, U., Meitinger, T., Posch, W., Pritz, C., Ross, D., Schroer, R. J., Wick, G., Wildin, R., & Wilflingseder, D.
Affiliations
  • University of Washington (US)
  • Innsbruck Medical University (AT)
  • Institute of Genetics and Cancer (GB)
  • Karolinska University Hospital (SE)
  • Centre National de la Recherche Scientifique (FR)
  • University Children's Hospital Zurich (CH)
  • Mount Sinai Hospital (CA)
  • University of Huddersfield (GB)
  • Umeå University (SE)
  • Case Western Reserve University (US)
  • Meir Medical Center (IL)
  • Karolinska Institutet (SE)
  • Izaak Walton Killam Health Centre (CA)
  • Imperial College London (GB)
  • West Middlesex University Hospital (GB)
Corresponding author
  • Byers, Peter H.
  • Zschocke, Johannes
Venue
The American Journal of Human Genetics
Publisher
Elsevier BV
Published
2016-11
Volume
99
Issue
5
Pages
1005-1014
ISSN
0002-9297 (ISSN-L)
OpenAlex
W2531200591
Cited by
123
References
40
Citations by year
2026: 8 · 2025: 4 · 2024: 10 · 2023: 11 · 2022: 20 · 2021: 14 · 2020: 18 · 2019: 15 · 2018: 13 · 2017: 10
FWCI
7.68
Type
journal article
Language
en
Open access
Locations
  • The American Journal of Human Genetics (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • UWA Profiles and Research Repository (UWA) (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Kölner Universitäts PublikationsServer (Universität zu Köln) (publishedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, cc-by)
  • HAL (submittedVersion, other-oa)
  • University of Huddersfield Repository (University of Huddersfield) (submittedVersion)
  • DiVA at Umeå University (Umeå University) (submittedVersion, other-oa)
  • UCL Discovery (University College London) (submittedVersion)
  • Institutional Research Information System University of Turin (University of Turin) (submittedVersion)
  • Huddersfield Research Portal (University of Huddersfield) (submittedVersion, cc-by)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, other-oa)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion, cc-by)
  • Zurich Open Repository and Archive (University of Zurich)
Funders
  • Oesterreichische Nationalbank (15408)
  • Propter Homines Foundation
  • FWF (W1253-B24)
  • SNF (310030_138288)
  • UK MRC Clinical Sciences Centre
  • Wellcome Clinical Training Fellowship (100565/Z/12/Z)
  • Freudmann Fund for Translational Research in Ehlers Danlos syndrome, the Ehlers Danlos Research Fund, and the Center for Precision Diagnostics at the University of Washington
  • National Heart, Lung, and Blood Institute (U54HG006493)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Complement system in diseases
  • Health Sciences › Dentistry › Periodontics › Oral microbiology and periodontitis research
  • Health Sciences › Health Professions › Pharmacy › Oral and gingival health research
Keywords
C1r, C1s, classical complement pathway, C1q, missense mutations, insertion-deletion mutations, periodontitis, endoplasmic reticulum retention, autosomal dominant disorder, gene mapping, joint hypermobility, skin fragility
MeSH terms
Adolescent, Adult, Child, Child, Preschool, Chromosome Mapping, Chromosomes, Human, Pair 12, Complement C1s, Ehlers-Danlos Syndrome, Endoplasmic Reticulum, Female, Humans, Male, Pedigree, Periodontitis, Protein Conformation, Complement C1r, Gene Deletion, Mutation, Missense, Young Adult, Genetic Loci, Exome

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