Warburg Micro Syndrome 1; Warbm1

Description

Warburg Micro syndrome is a rare autosomal recessive syndrome characterized by microcephaly, microphthalmia, microcornea, congenital cataracts, optic atrophy, cortical dysplasia, in particular corpus callosum hypoplasia, severe mental retardation, spastic diplegia, and hypogonadism (summary by Morris-Rosendahl et al., 2010). Genetic Heterogeneity of Warburg Micro SyndromeWarburg Micro syndrome-2 (WARBM2 ) is caused by mutation in the RAB3GAP2 gene (OMIM ) on chromosome 1q41. WARBM3 (OMIM ) is caused by mutation in the RAB18 gene (OMIM ) on chromosome 10p12. WARBM4 (OMIM ) is caused by mutation in the TBC1D20 gene (OMIM ) on chromosome 20p13.See also Martsolf syndrome (OMIM ), a clinically overlapping but milder autosomal recessive disorder caused by autosomal recessive mutation in the RAB3GAP2 gene.Handley et al. (2013) provided an overview of the disease variants identified in the RAB3GAP1, RAB3GAP2, and RAB18 genes, noting that a total of 144 families with WARBM and 9 families with Martsolf syndrome had been studied. Mutations were identified in RAB3GAP1 in 41% of cases, in RAB3GAP2 in 7% of cases, and in RAB18 in 5% of cases. Although RAB18 had not been linked to RAB3 pathways, Handley et al. (2013) stated that mutations in all 3 genes cause an indistinguishable phenotype, making it likely that there is some functional overlap.

Clinical Features

Top most frequent phenotypes and symptoms related to Warburg Micro Syndrome 1; Warbm1

  • Intellectual disability
  • Seizures
  • Global developmental delay
  • Short stature
  • Generalized hypotonia
  • Microcephaly
  • Growth delay
  • Failure to thrive
  • Micrognathia
  • Muscle weakness

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Incidence and onset information

— Currently we don't have prevalence information about this disease (Not enough data available about incidence and published cases.)
No data available about the known clinical features onset.

Alternative names

Warburg Micro Syndrome 1; Warbm1 Is also known as micro syndrome.

Researches and researchers

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Warburg Micro Syndrome 1; Warbm1 Recommended genes panels

Panel Name, Specifity and genes Tested/covered
Epilepsy Advanced Sequencing and CNV Evaluation - Developmental Brain Malformations.

By Athena Diagnostics Inc (United States).

SHH, STIL, SIX3, TUBA8, SLC25A19, DEAF1, ARFGEF2, RAB3GAP1, CENPJ, NDE1, FKRP, ARX, ASPM, POMGNT1, POMT2, TUBA1A, COL4A1, CPT2, WDR62, DCX , (...)

View the complete list with 20 more genes
Specificity
3 %
Genes
100 %
Epilepsy Advanced Sequencing and CNV Evaluation.

By Athena Diagnostics Inc (United States).

SCN1A, SCN1B, SCN2A, SCN3A, SCN5A, SCN8A, SCN9A, SHH, ST3GAL3, ST3GAL5, STIL, SIX3, SLC2A1, SLC35A2, SLC6A1, SLC6A8, SLC9A6, SMC1A, KDM5C, SMS , (...)

View the complete list with 214 more genes
Specificity
1 %
Genes
100 %
Comprehensive Brain Malformation Panel.

By Knight Diagnostic Laboratories - Molecular Diagnostic Center Oregon Health & Science University (United States).

SHH, STIL, SIX3, SLC9A6, SOX2, CDKL5, TGIF1, MED12, CEP41, TUBA8, UBE3A, VLDLR, VRK1, ZIC2, ACTB, MRPS16, NSD1, RAB18, ACTG1, SLC25A19 , (...)

View the complete list with 86 more genes
Specificity
1 %
Genes
100 %
Microcephaly.

By Knight Diagnostic Laboratories - Molecular Diagnostic Center Oregon Health & Science University (United States).

STIL, SLC9A6, CDKL5, TCF4, UBE3A, RAB18, SLC25A19, ZEB2, CASK, PCNT, RAB3GAP1, RAB3GAP2, CENPJ, IER3IP1, CDK5RAP2, ASPM, TUBB3, WDR62, DHCR7, NIPBL , (...)

View the complete list with 8 more genes
Specificity
4 %
Genes
100 %
Polymicrogyria Deletion/Duplication Panel.

By Genetic Services Laboratory University of Chicago (United States).

TUBA8, RAB18, CCND2, TBC1D20, RAB3GAP1, RAB3GAP2, NDE1, RTTN, TUBA1A, TUBB3, KIF1BP, WDR62, GPSM2, TUBB2B, ADGRG1, OCLN
Specificity
7 %
Genes
100 %
Cerebral Cortical Deletion/Duplication Panel.

By Genetic Services Laboratory University of Chicago (United States).

TUBA8, VLDLR, ACTB, RAB18, ACTG1, RAB3GAP1, RAB3GAP2, FKRP, ARX, RTTN, POMGNT1, POMT2, TUBA1A, TUBB3, KIF1BP, WDR62, DCX, TUBB2B, FKTN, ADGRG1 , (...)

View the complete list with 6 more genes
Specificity
4 %
Genes
100 %
Cerebral Cortical Malformation Sequencing Panel.

By Genetic Services Laboratory University of Chicago (United States).

SNAP29, TUBA8, TUBB2A, TUBG1, VLDLR, ACTB, RAB18, ACTG1, B3GNT2, B4GAT1, CCND2, ARFGEF2, TBC1D20, RAB3GAP1, RAB3GAP2, NDE1, CDK5, FKRP, ARX, ATP6V0A2 , (...)

View the complete list with 34 more genes
Specificity
2 %
Genes
100 %
Warburg Micro Syndrome Comprehensive Panel.

By Genetic Services Laboratory University of Chicago (United States).

RAB18, TBC1D20, RAB3GAP1, RAB3GAP2
Specificity
25 %
Genes
100 %

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Sources and references

You can check the following sources for additional information.

OMIM Genetic Syndrome Finder

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