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a mutation, c.303-305delGAA, located in the third exon of TBX1 that does not disrupt TBX1 mRNA expression or DNA binding activity, but results in decreased TBX1 protein levels and transcriptional activity.
The screening of TBX1 coding sequence identified a novel missense mutation c.569C>A (p.P190Q) in six unrelated patients with syndromic congenital heart defects.
PCR and western blotting demonstrated that TBX1 expression may be associated with congenital heart disease.
Studied expression, function, and regulation of T-box transcription factor (TBX1), in human parathyroid adult normal and tumor tissues.
A genome wide are study to identify acute kidney injury risk in critically ill patients identified a locus on chromosome 22 found 140kb upstream of TBX1, and may affect pathways that contribute to AKI pathophysiology.
The results clearly suggest a possible etiologic association between the TBX1 deletion and Tetralogy of Fallot.
TBX1 loss-of-function mutation with enhanced susceptibility to double outlet right ventricle (DORV) and ventricular septal defect (VSD)in humans, which provides novel insight into the molecular mechanism underlying Congenital heart disease (CHD).
SNPs in three genes CYP26B1 rs2241057, CISD1 rs2251039, rs2590370, and TBX1 rs4819522 were involved in six potential pathways to influence serum prostate-specific antigen levels.
TBX1 T-box domain binds DNA as two distinct monomers.
TBX1 isoform C is the biologically essential variant and that TBX1 mutations are associated with a wide phenotypic spectrum, including most of 22q11.2DS phenotypes.
Findings indicate an association between TBX1 variations and fetal CTD. The results also demonstrate the power of array CGH to further scrutinize the critical gene(s) of del22q11.2 syndrome responsible for heart defects.
Observations suggest that TBX1 loss-of-function mutation may be involved in the pathogenesis of isolated conotrucal heart defects (CTDs)in patients without 22q11.2 deletion.
Results show that TBX1 regulates brain angiogenesis through the DLL4/Notch1-VEGFR3 regulatory axis.
DNA sequence variants within the TBX1 gene promoter may change TBX1 level, contributing to indirect inguinal hernia development as a rare risk factor
TBX1 can alter TGF-beta/BMP, an important signaling pathway, through interacting with HOXD10. Above findings may shed light on the mechanism of TBX1 mutations leading to renal malformations found in patients carrying a 22q11 deletion.
shRNA silencing of the T-box transcription factor Brachyury resulted in downregulation of the EMT and stem cell markers in adenoid cystic carcinoma cell lines. Brachyury expression in clinical samples of AdCC was extremely high and closely related to EMT.
common DNA variants in TBX1 may be nominally causative for CP in patients with 22q11DS. This raises the possibility that genes elsewhere on the remaining allele of 22q11.2 or in the genome could be relevant.
The sequence variants within TBX1 gene promoter may contribute to the ventricular septal defect etiology by altering the expression levels of TBX1 gene.
We describe eight patients with variable phenotype features harboring atypical distal deletions of chromosome 22q11.2 not encompassing the TBX1 gene.
Brachyury and related Tbx proteins interact with the Mixl1 homeodomain protein and negatively regulate Mixl1 transcriptional activity
tested for possible epistasis between Tbx1 and the CXCL12 signalling axis by examining Tbx1 and Cxcl12 double heterozygotes as well as Tbx1/Cxcl12/Cxcr4 triple heterozygotes, but failed to identify any exacerbation of the Tbx1 haploinsufficient arch artery phenotype
Normal downregulation of the definitive arterial pole progenitor cell program in the posterior of the Second Heart Field (SHF) is dependent on both Tbx1 and Tbx5. Furthermore, retinoic acid (RA) signaling is required for Tbx5 activation in Tbx1-positive cells and blocking RA signaling at the time of Tbx5 activation results in atrioventricular septal defects at fetal stages.
Tbx1 regulates the Mef2c anterior heart field enhancer by inducing histone deacetylation.
Deletion of Tbx1 affects expression of cleft palate disease-causing genes in the developing palatal shelves of mice. TBX1 controls palatogenesis, mediated through the regulation of genes involved in muscle cell differentiation, nervous system development, and biomineral tissue development.
These results suggest that a major function of TBX1 in the anterior heart field is to maintain the normal balance of expression of key cardiac developmental genes required to form the aorta and pulmonary trunk, which is disrupted in 22q11.2DS and 22q11.2DupS
differences in gene expression profile within the secondary palate of wild type and mutant embryos is consistent with a primary role for Tbx1 during palatogenesis
the testis-expressed transcription factor, Tbx1, and the piRNA regulator of gamete development, Piwil1, were both found to be targeted for translational repression by MSI2.
A mutation in T-box of TBX1 was identified in an animal model of DiGeorge Syndrome; it's the DNA binding domain for transcription activity.
Data show that beta-catenin was increased in expression when Tbx1 was inactivated, suggesting that there may be a negative feedback loop between canonical Wnt and Tbx1.
Results show that loss of Tbx1 disrupts corticogenesis in mice by promoting premature neuronal differentiation in the medio-lateral embryonic cortex, which gives rise to the somatosensory cortex; altered polarity in both radially migrating excitatory neurons and tangentially migrating inhibitory interneurons; mesoderm-specific inactivation of Tbx1 is sufficient to recapitulate the brain phenotype
Tbx1 is required for the patterning but not timing of CA stem development and a Tbx1 reporter allele is expressed in myocardium adjacent to the left but not right CA stem.
Cell orientation is biased towards the shelf distal edge in the mid-palate of wild-type embryos but is essentially random in the Tbx1(-/-) mutant shelves
These results suggest that TBX1 plays a role in maintaining a progenitor state in VEGFR2+ cells.
Tbx1 is required upstream of key myogenic genes needed for core mesoderm cell survival and fate, between E9.5 and E10.5, resulting in formation of the branchiomeric muscles.
Tbx1 binds to the miR-96 promoter and represses miR-96 expression.
Loss of Tbx1 in mouse (Tbx1(-/-)) results in skeletal abnormalities similar to those of cleidocranial dysplasia in humans.
these data suggest that the molecular pathogenesis of ventricular septal defectss in Moz germline mutant mice is due to loss of MOZ-dependant activation of mesodermal Tbx1 and Tbx5 expression.
the present studies establish new insights into molecular aspects of TBX1 binding to DNA.
Prdm1 functions in the mesoderm of the second heart field, where it interacts genetically with Tbx1, during outflow tract morphogenesis in the mouse embryo.
Tbx1 deletion from the pharyngeal endoderm is sufficient to cause caudal pharyngeal arch segmentation defects by FGF-independent effectors that remain to be identified.
Tbx1 controls the morphogenesis of pharyngeal pouch epithelia through mesodermal Wnt11r and Fgf8a.
Conservation of Tbx1 function in zebrafish second heart field biology.
Her9 represses neurogenic fate downstream of Tbx1 and retinoic acid signaling in the inner ear.
Tbx1 might play an essential role in the development of pharyngeal neural crest cells in zebrafish. Cardiac performance is impaired by Tbx1 knock down in zebrafish.
Retinoic acid could produce an altered Tbx1 expression pattern in zebrafish embryos.
This newly identified tbx1 expression pattern in cardiac regions other than the cardiac outflow tract offers a new insight into the role of the tbx1 transcription factor in cardiac development.
Probable role in regulating transcription of specific genes. May regulate through NFKB1 the expression of the CCL2/MCP-1 chemokine. May play a role in tumor necrosis factor alpha (TNF- alpha) gene expression.
T-box 1 transcription factor C
, T-box transcription factor TBX1
, Testis-specific T-box protein
, T-box protein 1
, testis-specific T-box protein
, van gogh
, T-box 1
, T-box transcription factor 1
, T-box protein 1-B
, T-box transcription factor TBX1-B