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. 2023 Jan;25(1):135-142.
doi: 10.1016/j.gim.2022.09.016. Epub 2022 Nov 18.

Biallelic PRMT7 pathogenic variants are associated with a recognizable syndromic neurodevelopmental disorder with short stature, obesity, and craniofacial and digital abnormalities

Elisa Cali  1 Mohnish Suri  2 Marcello Scala  3 Matteo P Ferla  4 Shahryar Alavi  5 Eissa Ali Faqeih  6 Emilia K Bijlsma  7 Kristen M Wigby  8 Diana Baralle  9 Mohammad Y V Mehrjardi  10 Jennifer Schwab  11 Konrad Platzer  12 Katharina Steindl  13 Mais Hashem  14 Marilyn Jones  8 Dmitriy M Niyazov  15 Jennifer Jacober  15 Rebecca Okashah Littlejohn  16 Denisa Weis  17 Neda Zadeh  18 Lance Rodan  19 Alice Goldenberg  20 François Lecoquierre  20 Marina Dutra-Clarke  21 Gabriella Horvath  22 Dana Young  23 Naama Orenstein  24 Shahad Bawazeer  6 Anneke T Vulto-van Silfhout  25 Yvan Herenger  26 Mohammadreza Dehghani  10 Seyed Mohammad Seyedhassani  27 Amir Bahreini  28 Mahya E Nasab  27 A Gulhan Ercan-Sencicek  29 Zahra Firoozfar  30 Mojtaba Movahedinia  31 Stephanie Efthymiou  1 Pasquale Striano  3 Ehsan Ghayoor Karimiani  32 Vincenzo Salpietro  33 Jenny C Taylor  4 Melody Redman  34 Alexander P A Stegmann  35 Andreas Laner  36 Ghada Abdel-Salam  37 Megan Li  38 Mario Bengala  39 Amelie Johanna Müller  40 Maria C Digilio  41 Anita Rauch  13 Murat Gunel  42 Hannah Titheradge  43 Daniela N Schweitzer  21 Alison Kraus  44 Irene Valenzuela  45 Scott D McLean  16 Chanika Phornphutkul  15 Mustafa Salih  46 Amber Begtrup  47 Rhonda E Schnur  47 Erin Torti  47 Tobias B Haack  48 Carlos E Prada  49 Fowzan S Alkuraya  50 Henry Houlden  1 Reza Maroofian  51
Affiliations

Biallelic PRMT7 pathogenic variants are associated with a recognizable syndromic neurodevelopmental disorder with short stature, obesity, and craniofacial and digital abnormalities

Elisa Cali et al. Genet Med. 2023 Jan.

Abstract

Purpose: Protein arginine methyltransferase 7 (PRMT7) is a member of a family of enzymes that catalyzes the methylation of arginine residues on several protein substrates. Biallelic pathogenic PRMT7 variants have previously been associated with a syndromic neurodevelopmental disorder characterized by short stature, brachydactyly, intellectual developmental disability, and seizures. To our knowledge, no comprehensive study describes the detailed clinical characteristics of this syndrome. Thus, we aim to delineate the phenotypic spectrum of PRMT7-related disorder.

Methods: We assembled a cohort of 51 affected individuals from 39 different families, gathering clinical information from 36 newly described affected individuals and reviewing data of 15 individuals from the literature.

Results: The main clinical characteristics of the PRMT7-related syndrome are short stature, mild to severe developmental delay/intellectual disability, hypotonia, brachydactyly, and distinct facial morphology, including bifrontal narrowing, prominent supraorbital ridges, sparse eyebrows, short nose with full/broad nasal tip, thin upper lip, full and everted lower lip, and a prominent or squared-off jaw. Additional variable findings include seizures, obesity, nonspecific magnetic resonance imaging abnormalities, eye abnormalities (i.e., strabismus or nystagmus), and hearing loss.

Conclusion: This study further delineates and expands the molecular, phenotypic spectrum and natural history of PRMT7-related syndrome characterized by a neurodevelopmental disorder with skeletal, growth, and endocrine abnormalities.

Keywords: Chromatinopathy; Mendelian disorders of the epigenetic machinery; PRMT7; Syndromic neurodevelopmental disorder; Syndromic obesity.

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Conflict of interest statement

Conflict of Interest Megan Li is an employee of Invitae. Erin Torti, Amber Begtrup, and Rhonda E Schnur are employees of GeneDx, Inc. All other authors declare no conflicts of interest.

Figures

None
Graphical abstract
Figure 1
Figure 1
Phenotypic presentation of individuals with PRMT7-related syndrome. From I to XVI: craniofacial features of affected individuals, front view. From XVIIa to XXIVd: evolution of facial features among different ages. From XXV to XL: craniofacial features of affected individuals, sagittal view. From XLI to LIII: digital abnormalities. From LIV to LIX: stature of affected individuals. From LX to LXVIII: foot abnormalities.
Figure 2
Figure 2
Overview of the main clinical features of PRMT7-related disorder. A. Occurrence of the main phenotypic features in the cohort. Green: Phenotype present. Blue: Phenotype not present. Yellow: Information not available. B. Degree of intellectual disability. C. Prevalence of obesity by age group and sex. D. Distribution of height percentile throughout the cohort. E. Prevalence of short stature among different ages. F. Deep characterization of the main dysmorphological features of the craniofacial (blue), periorbital (green), nasal (yellow), and perioral (light blue) areas.
Supplementary Figure S1
Supplementary Figure S1

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