Genetic Analysis of \u27PAX6-Negative\u27 Individuals with Aniridia or Gillespie Syndrome.

We report molecular genetic analysis of 42 affected individuals referred with a diagnosis of aniridia who previously screened as negative for intragenic PAX6 mutations. Of these 42, the diagnoses were 31 individuals with aniridia and 11 individuals referred with a diagnosis of Gillespie syndrome (iris hypoplasia, ataxia and mild to moderate developmental delay). Array-based comparative genomic hybridization identified six whole gene deletions: four encompassing PAX6 and two encompassing FOXC1. Six deletions with plausible cis-regulatory effects were identified: five that were 3\u27 (telomeric) to PAX6 and one within a gene desert 5\u27 (telomeric) to PITX2. Sequence analysis of the FOXC1 and PITX2 coding regions identified two plausibly pathogenic de novo FOXC1 missense mutations (p.Pro79Thr and p.Leu101Pro). No intragenic mutations were detected in PITX2. FISH mapping in an individual with Gillespie-like syndrome with an apparently balanced X;11 reciprocal translocation revealed disruption of a gene at each breakpoint: ARHGAP6 on the X chromosome and PHF21A on chromosome 11. In the other individuals with Gillespie syndrome no mutations were identified in either of these genes, or in HCCS which lies close to the Xp breakpoint. Disruption of PHF21A has previously been implicated in the causation of intellectual disability (but not aniridia). Plausibly causative mutations were identified in 15 out of 42 individuals (12/32 aniridia; 3/11 Gillespie syndrome). Fourteen of these mutations presented in the known aniridia genes; PAX6, FOXC1 and PITX2. The large number of individuals in the cohort with no mutation identified suggests greater locus heterogeneity may exist in both isolated and syndromic aniridia than was previously appreciated

Proceedings on the repeal of an Act before the Constitutional Court, with focus on the review of whether the Act was adopted in the constitutionally prescribed procedure

Proceedings on the repeal of an Act before the Constitutional Court, with focus on the review of whether the Act was adopted in the constitutionally prescribed procedure Abstract The thesis deals with the judicial control of constitutionality with a specific focus on the review of the constitutionality of the legislative procedure. The first part of the thesis deals with the general definition of the constitutional judiciary, the position of the Constitutional Court in constitutional system of the Czech Republic and the definition of basic concepts that must be unconditionally known for the next parts of the thesis. The first part of the thesis concludes with a reflection on the topic whether the Constitutional Court really maintains its role as a predominantly negative legislator. In the second part, the thesis focuses on the description of the current legislation on court proceedings of the repeal of an Act or its individual provisions. The main topic of the second part of the thesis deals are the special effects of the decisions of the Constitutional Court in this type of proceedings and the question about binding nature of its reasoning. The author describes, for example, the specific effects of these decisions in horizontal relations or their effects on the specific proceedings from which the proposal..

Identification of regulatory deletions telomeric to <i>PAX6</i>.

<p>Regulatory deletions telomeric to <i>PAX6</i> were identified in individual 1514 (chr11:30,874,642–31,654,833), individual 753 (chr11:30,967,000–31,704,000), individual 555 (chr11:31,108,579–31,649–842), individual 2014 (chr11:31,234,395–31,751,815) and individual 659 (chr11:31,379,000–31,708,000). The schematic diagram shows how the ‘critical region’ (delimited by grey dotted lines) required for <i>PAX6</i> transcriptional activation was delineated by combining our data with published deletions with known coordinates [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0153757#pone.0153757.ref055" target="_blank">55</a>,<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0153757#pone.0153757.ref067" target="_blank">67</a>,<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0153757#pone.0153757.ref068" target="_blank">68</a>]. <i>PAX6</i> regulatory deletions from the present study are shown by red blocks. Genes transcribed on the forward strand are in blue and those transcribed on the reverse strand are in green, also indicated by arrows. Genomic coordinates are based on the Human Genome Assembly hg18.</p

Identification of a potential <i>PITX2</i> regulatory deletion.

<p>Genome-wide array CGH identified a deletion of approximately 3.5 Mb in individual 1194 (chr4:111,994,000–115,504,000) (red bar). The deletion is located telomeric to the <i>PITX2</i> gene on chromosome 4. The positions of conserved elements (CE) in the deleted region, as identified by Volkmann et al., 2011 [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0153757#pone.0153757.ref047" target="_blank">47</a>] are marked by orange ellipses. Genes transcribed on the forward strand are in blue and those transcribed on the reverse strand are in green, also indicated by arrows. Genomic coordinates are shown on the x-axis and are based on the Human Genome Assembly hg18.</p

Mutation analysis of the <i>FOXC1</i> locus.

<p><b>(A)</b> Genome-wide array CGH identified two deletions encompassing the <i>FOXC1</i> gene in individuals 1449 (chr6:1,543,591–1,675,085) and 1246 (chr6:1,543,591–1,675,085). <b>(B)</b> Direct sequencing of the <i>FOXC1</i> coding region identified a heterozygous substitution in individual 1839 (c.235C>A, p.(Pro79Thr)) and another in individual 1634 (c.302T>C, p.(Leu101Pro)). <i>FOXC1</i> mutation screening in unaffected parents of both patients showed that the mutations had occurred <i>de novo</i>. The locations of both mutations within the fork-head domain of the FOXC1 protein are indicated by vertical arrows. Genes transcribed on the forward strand are in blue and those transcribed on the reverse strand are in green, also indicated by arrows. Genomic coordinates are based on the Human Genome Assembly hg18. The genomic sequence identifier for <i>FOXC1</i> is NG_009368.</p