Evidence map›Paper›PMID 34385670›Full record

ArticleGenetics in medicine : official journal of the American College of Medical Genetics2021

Biallelic loss-of-function variants in the splicing regulator NSRP1 cause a severe neurodevelopmental disorder with spastic cerebral palsy and epilepsy.

Daniel G Calame, Somayeh Bakhtiari, Rachel Logan, Zeynep Coban-Akdemir, Haowei Du, Tadahiro Mitani, Jawid M Fatih, Jill V Hunter, Isabella Herman, Davut Pehlivan and 18 more

Open access · bronzeAbstract read
In one paragraph

Article in Genetics in medicine : official journal of the American College of Medical Genetics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
0.9field-weighted citation impact, top 27% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

13 citing papers in PubMed, 16 citations in OpenAlex.

  1. medRxiv : the preprint server for health sciences · 2026
    Article
  2. Repeat expansions inbioRxiv : the preprint server for biology · 2026
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  3. Review
  4. Genetics of epilepsy.Experimental biology and medicine (Maywood, N.J.) · 2026
    Review
  5. Article
  6. Article
  7. Article
  8. Functional genomics and small molecules in mitochondrial neurodevelopmental disorders.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2024
    Review
  9. Review
  10. Article
  11. Article
  12. Article
  13. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

28 authors at 13 institutions in 5 countries.

Daniel G Calame *Division of Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA.
Somayeh Bakhtiari *Pediatric Movement Disorders Program, Division of Pediatric Neurology, Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, USA.
Rachel LoganDivision of Neurosciences, Children's Healthcare of Atlanta, Atlanta, GA, USA.
Zeynep Coban-AkdemirDepartment of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
Haowei DuDepartment of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
Tadahiro MitaniDepartment of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
Jawid M FatihDepartment of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
Jill V HunterDepartment of Radiology, Baylor College of Medicine, Houston, TX, USA.
Isabella HermanDivision of Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA.
Davut PehlivanDivision of Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA.
Shalini N JhangianiHuman Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA.
Richard PersonGeneDX, Gaithersburg, MD, USA.
Rhonda E SchnurGeneDX, Gaithersburg, MD, USA.
Sheng Chih JinDepartment of Genetics, Washington University School of Medicine, St. Louis, MO, USA.
Kaya BilguvarDepartment of Genetics, Yale University, New Haven, CT, USA.
Jennifer E PoseyDepartment of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
Sookyong KohDepartment of Pediatrics, Children's Hospital, University of Nebraska, Omaha, NE, USA.
Saghar G FirouzabadiGenetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
Elham AlehabibStudent Research Committee, Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Abbas TafakhoriIranian Center of Neurological Research, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran.
Sahra EsmkhaniDepartment of Basic Oncology, Division of Cancer Genetics, Oncology Institute, Istanbul University, Istanbul, Turkey.
Richard A GibbsDepartment of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
Mahmoud M NoureldeenDepartment of Pediatrics, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt.
Maha S ZakiDepartment of Clinical Genetics, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt.
Dana MarafiDepartment of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
Hossein DarvishNeuroscience Research Center, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran. darvish_mg@yahoo.com.
Michael C KruerPediatric Movement Disorders Program, Division of Pediatric Neurology, Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, USA. mkruer@phoenixchildrens.com.
James R LupskiTexas Children's Hospital, Houston, TX, USA. jlupski@bcm.edu.
Baylor College of Medicine · USBarrow Neurological Institute · USBeni-Suef University · EGChildren's Healthcare of Atlanta · USChildren's Hospital & Medical Center · USGolestan University · IRNational Research Centre · EGNpistanbul Brain Hospital · TRShahid Beheshti University of Medical Sciences · IRTehran University of Medical Sciences · IRUniversity of Social Welfare and Rehabilitation Sciences · IRWashington University in St. Louis · USYale University · US

Funding

The Human Genome Sequencing CenterU54HG003273 · NHGRI · BAYLOR COLLEGE OF MEDICINE · PI GIBBS, RICHARD A · 2004 to 2015
$341.3M
Yale Clinical and Translational Science Award (U Component)UL1TR001863 · NCATS · YALE UNIVERSITY · PI John H. Krystal, LUCILA OHNO-MACHADO · 2016 to 2026
$102.9M
Yale Center for Mendelian GenomicsUM1HG006504 · NHGRI · YALE UNIVERSITY · PI GERSTEIN, MARK BENDER, GUNEL, MURAT · 2016 to 2020
$14.8M
Baylor-Johns Hopkins Center for Mendelian GeneticsUM1HG006542 · NHGRI · JOHNS HOPKINS UNIVERSITY · PI VALLE, DAVID · 2016 to 2020
$14.5M
MEDICAL GENETICS RESEARCH FELLOWSHIP PROGRAMT32GM007526 · NIGMS · BAYLOR COLLEGE OF MEDICINE · PI Brendan Lee · 1985 to 2026
$11.4M
Yale Center for Mendelian DisordersU54HG006504 · NHGRI · YALE UNIVERSITY · PI GERSTEIN, MARK BENDER, GUNEL, MURAT · 2012 to 2015
$11.0M
STRUCTURAL VARIATION IN NEUROLOGICAL DISEASER35NS105078 · NINDS · BAYLOR COLLEGE OF MEDICINE · PI LUPSKI, JAMES R. · 2018 to 2025
$6.0M
Mutidisciplinary Training;Brain Disorders &DevelopmentT32NS043124 · NINDS · BAYLOR COLLEGE OF MEDICINE · PI SWANN, JOHN WILLIAM · 2002 to 2021
$4.6M
Genomic Insights into the Neurobiology of Cerebral PalsyR01NS106298 · NINDS · UNIVERSITY OF ARIZONA · PI KRUER, MICHAEL C · 2019 to 2023
$3.7M
Individual genomic analyses to discover the molecular basis and mechanisms contributing to adult-onset diseaseK08HG008986 · NHGRI · BAYLOR COLLEGE OF MEDICINE · PI POSEY, JENNIFER ELLEN · 2017 to 2021
$831k
Integrative Genomic Analysis of Congenital Heart DiseaseR00HL143036 · NHLBI · WASHINGTON UNIVERSITY · PI JIN, SHENG CHIH · 2020 to 2022
$730k
NCATS NIH HHS UL1 TR001863NHGRI NIH HHS K08 HG008986NHGRI NIH HHS U54 HG003273NHGRI NIH HHS U54HG003273NHGRI NIH HHS U54 HG006504NHGRI NIH HHS UM1 HG006504NHGRI NIH HHS UM1 HG006542NHLBI NIH HHS R00 HL143036NIGMS NIH HHS T32 GM007526NINDS NIH HHS R01 NS106298NINDS NIH HHS R35 NS105078NINDS NIH HHS T32 NS043124
6 · The paper itself

Abstract

purposeAlternative splicing plays a critical role in mouse neurodevelopment, regulating neurogenesis, cortical lamination, and synaptogenesis, yet few human neurodevelopmental disorders are known to result from pathogenic variation in splicing regulator genes. Nuclear Speckle Splicing Regulator Protein 1 (NSRP1) is a ubiquitously expressed splicing regulator not known to underlie a Mendelian disorder.

methodsExome sequencing and rare variant family-based genomics was performed as a part of the Baylor-Hopkins Center for Mendelian Genomics Initiative. Additional families were identified via GeneMatcher.

resultsWe identified six patients from three unrelated families with homozygous loss-of-function variants in NSRP1. Clinical features include developmental delay, epilepsy, variable microcephaly (Z-scores -0.95 to -5.60), hypotonia, and spastic cerebral palsy. Brain abnormalities included simplified gyral pattern, underopercularization, and/or vermian hypoplasia. Molecular analysis identified three pathogenic NSRP1 predicted loss-of-function variant alleles: c.1359_1362delAAAG (p.Glu455AlafsTer20), c.1272dupG (p.Lys425GlufsTer5), and c.52C>T (p.Gln18Ter). The two frameshift variants result in a premature termination codon in the last exon, and the mutant transcripts are predicted to escape nonsense mediated decay and cause loss of a C-terminal nuclear localization signal required for NSRP1 function.

conclusionWe establish NSRP1 as a gene for a severe autosomal recessive neurodevelopmental disease trait characterized by developmental delay, epilepsy, microcephaly, and spastic cerebral palsy.

Indexed as

Cerebral PalsyEpilepsyMicrocephalyNeurodevelopmental DisordersHumansNuclear ProteinsPedigreeRNA SplicingNSRP1 protein, humanNuclear Proteins

Identifiers

PMID34385670
PMCPMC8633036
OpenAlexW3191833103

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.