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 PMID:29773874  

Mutations in six nephrosis genes delineate a pathogenic pathway amenable to treatment.

Shazia Ashraf | Hiroki Kudo | Jia Rao | Atsuo Kikuchi | Eugen Widmeier | Jennifer A Lawson | Weizhen Tan | Tobias Hermle | Jillian K Warejko | Shirlee Shril | Merlin Airik | Tilman Jobst-Schwan | Svjetlana Lovric | Daniela A Braun | Heon Yung Gee | David Schapiro | Amar J Majmundar | Carolin E Sadowski | Werner L Pabst | Ankana Daga | Amelie T van der Ven | Johanna M Schmidt | Boon Chuan Low | Anjali Bansal Gupta | Brajendra K Tripathi | Jenny Wong | Kirk Campbell | Kay Metcalfe | Denny Schanze | Tetsuya Niihori | Hiroshi Kaito | Kandai Nozu | Hiroyasu Tsukaguchi | Ryojiro Tanaka | Kiyoshi Hamahira | Yasuko Kobayashi | Takumi Takizawa | Ryo Funayama | Keiko Nakayama | Yoko Aoki | Naonori Kumagai | Kazumoto Iijima | Henry Fehrenbach | Jameela A Kari | Sherif El Desoky | Sawsan Jalalah | Radovan Bogdanovic | Nataša Stajić | Hildegard Zappel | Assel Rakhmetova | Sharon-Rose Wassmer | Therese Jungraithmayr | Juergen Strehlau | Aravind Selvin Kumar | Arvind Bagga | Neveen A Soliman | Shrikant M Mane | Lewis Kaufman | Douglas R Lowy | Mohamad A Jairajpuri | Richard P Lifton | York Pei | Martin Zenker | Shigeo Kure | Friedhelm Hildebrandt
Nature communications | 2018

No efficient treatment exists for nephrotic syndrome (NS), a frequent cause of chronic kidney disease. Here we show mutations in six different genes (MAGI2, TNS2, DLC1, CDK20, ITSN1, ITSN2) as causing NS in 17 families with partially treatment-sensitive NS (pTSNS). These proteins interact and we delineate their roles in Rho-like small GTPase (RLSG) activity, and demonstrate deficiency for mutants of pTSNS patients. We find that CDK20 regulates DLC1. Knockdown of MAGI2, DLC1, or CDK20 in cultured podocytes reduces migration rate. Treatment with dexamethasone abolishes RhoA activation by knockdown of DLC1 or CDK20 indicating that steroid treatment in patients with pTSNS and mutations in these genes is mediated by this RLSG module. Furthermore, we discover ITSN1 and ITSN2 as podocytic guanine nucleotide exchange factors for Cdc42. We generate Itsn2-L knockout mice that recapitulate the mild NS phenotype. We, thus, define a functional network of RhoA regulation, thereby revealing potential therapeutic targets.

Pubmed ID: 29773874

Associated grants

  • Agency: NIDDK NIH HHS, United States
    Id: R01 DK103022
  • Agency: NIDDK NIH HHS, United States
    Id: P30 DK079310
  • Agency: NIH HHS, United States
    Id: S10 OD018521
  • Agency: NIDDK NIH HHS, United States
    Id: R01 DK076683
  • Agency: NIDDK NIH HHS, United States
    Id: T32 DK007726
  • Agency: NIDDK NIH HHS, United States
    Id: T32 DK007757

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This is a list of tools and resources that we have found mentioned in this publication.


ATCC (tool)

RRID:SCR_001672

Global nonprofit biological resource center (BRC) and research organization that provides biological products, technical services and educational programs to private industry, government and academic organizations. Its mission is to acquire, authenticate, preserve, develop and distribute biological materials, information, technology, intellectual property and standards for the advancement and application of scientific knowledge. The primary purpose of ATCC is to use its resources and experience as a BRC to become the world leader in standard biological reference materials management, intellectual property resource management and translational research as applied to biomaterial development, standardization and certification. ATCC characterizes cell lines, bacteria, viruses, fungi and protozoa, as well as develops and evaluates assays and techniques for validating research resources and preserving and distributing biological materials to the public and private sector research communities.

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Addgene (tool)

RRID:SCR_002037

Non-profit plasmid repository dedicated to helping scientists around the world share high-quality plasmids. Facilitates archiving and distributing DNA-based research reagents and associated data to scientists worldwide. Repository contains over 65,000 plasmids, including special collections on CRISPR, fluorescent proteins, and ready-to-use viral preparations. There is no cost for scientists to deposit plasmids, which saves time and money associated with shipping plasmids themselves. All plasmids are fully sequenced for validation and sequencing data is openly available. We handle the appropriate Material Transfer Agreements (MTA) with institutions, facilitating open exchange and offering intellectual property and liability protection for depositing scientists. Furthermore, we curate free educational resources for the scientific community including a blog, eBooks, video protocols, and detailed molecular biology resources.

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UCSC Genome Browser (tool)

RRID:SCR_005780

Portal to interactively visualize genomic data. Provides reference sequences and working draft assemblies for collection of genomes and access to ENCODE and Neanderthal projects. Includes collection of vertebrate and model organism assemblies and annotations, along with suite of tools for viewing, analyzing and downloading data.

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MutationTaster (tool)

RRID:SCR_010777

Evaluates disease-causing potential of sequence alterations.

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PolyPhen: Polymorphism Phenotyping (tool)

RRID:SCR_013189

Software tool which predicts possible impact of amino acid substitution on structure and function of human protein using straightforward physical and comparative considerations. PolyPhen-2 is new development of PolyPhen tool for annotating coding nonsynonymous SNPs.

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GATK (tool)

RRID:SCR_001876

A software package to analyze next-generation resequencing data. The toolkit offers a wide variety of tools, with a primary focus on variant discovery and genotyping as well as strong emphasis on data quality assurance. Its robust architecture, powerful processing engine and high-performance computing features make it capable of taking on projects of any size. This software library makes writing efficient analysis tools using next-generation sequencing data very easy, and second it's a suite of tools for working with human medical resequencing projects such as 1000 Genomes and The Cancer Genome Atlas. These tools include things like a depth of coverage analyzers, a quality score recalibrator, a SNP/indel caller and a local realigner. (entry from Genetic Analysis Software)

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dbSNP (tool)

RRID:SCR_002338

Database as central repository for both single base nucleotide substitutions and short deletion and insertion polymorphisms. Distinguishes report of how to assay SNP from use of that SNP with individuals and populations. This separation simplifies some issues of data representation. However, these initial reports describing how to assay SNP will often be accompanied by SNP experiments measuring allele occurrence in individuals and populations. Community can contribute to this resource.

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1000 Genomes: A Deep Catalog of Human Genetic Variation (tool)

RRID:SCR_006828

International collaboration producing an extensive public catalog of human genetic variation, including SNPs and structural variants, and their haplotype contexts, in an effort to provide a foundation for investigating the relationship between genotype and phenotype. The genomes of about 2500 unidentified people from about 25 populations around the world were sequenced using next-generation sequencing technologies. Redundant sequencing on various platforms and by different groups of scientists of the same samples can be compared. The results of the study are freely and publicly accessible to researchers worldwide. The consortium identified the following populations whose DNA will be sequenced: Yoruba in Ibadan, Nigeria; Japanese in Tokyo; Chinese in Beijing; Utah residents with ancestry from northern and western Europe; Luhya in Webuye, Kenya; Maasai in Kinyawa, Kenya; Toscani in Italy; Gujarati Indians in Houston; Chinese in metropolitan Denver; people of Mexican ancestry in Los Angeles; and people of African ancestry in the southwestern United States. The goal Project is to find most genetic variants that have frequencies of at least 1% in the populations studied. Sequencing is still too expensive to deeply sequence the many samples being studied for this project. However, any particular region of the genome generally contains a limited number of haplotypes. Data can be combined across many samples to allow efficient detection of most of the variants in a region. The Project currently plans to sequence each sample to about 4X coverage; at this depth sequencing cannot provide the complete genotype of each sample, but should allow the detection of most variants with frequencies as low as 1%. Combining the data from 2500 samples should allow highly accurate estimation (imputation) of the variants and genotypes for each sample that were not seen directly by the light sequencing. All samples from the 1000 genomes are available as lymphoblastoid cell lines (LCLs) and LCL derived DNA from the Coriell Cell Repository as part of the NHGRI Catalog. The sequence and alignment data generated by the 1000genomes project is made available as quickly as possible via their mirrored ftp sites. ftp://ftp.1000genomes.ebi.ac.uk ftp://ftp-trace.ncbi.nlm.nih.gov/1000genomes

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GENEHUNTER (tool)

RRID:SCR_009191

Software application for multipoint analysis of pedigree data including: non-parametric linkage analysis, LOD-score computation, information-content mapping, haplotype reconstruction (entry from Genetic Analysis Software)

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BD Biosciences (tool)

RRID:SCR_013311

An Antibody supplier

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Agilent Technologies (tool)

RRID:SCR_013575

Company provides laboratories worldwide with analytical instruments and supplies, clinical and diagnostic testing services, consumables, applications and expertise in life sciences and applied chemical markets.

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HEK293T (tool)

RRID:CVCL_0063

Cell line HEK293T is a Transformed cell line with a species of origin Homo sapiens (Human)

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C57BL/6J (tool)

RRID:IMSR_JAX:000664

Mus musculus with name C57BL/6J from IMSR.

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