scholarly journals Novel mutations in PDE6A and CDHR1 cause retinitis pigmentosa in Pakistani families

2021 ◽  
Vol 14 (12) ◽  
pp. 1843-1851
Author(s):  
Muhammad Dawood ◽  
◽  
Taj Ud Din ◽  
Irfan Ullah Shah ◽  
Niamat Khan ◽  
...  
Keyword(s):  
Retinitis Pigmentosa ◽  
Autosomal Recessive ◽  
Genetic Basis ◽  
Frameshift Mutation ◽  
Splice Site Mutation ◽  
Novel Mutations ◽  
Site Mutation ◽  
Whole Exome ◽  
Potential Pathogenicity ◽  
Pakistani Families

AIM: To investigate the genetic basis of autosomal recessive retinitis pigmentosa (arRP) in two consanguineous/ endogamous Pakistani families. METHODS: Whole exome sequencing (WES) was performed on genomic DNA samples of patients with arRP to identify disease causing mutations. Sanger sequencing was performed to confirm familial segregation of identified mutations, and potential pathogenicity was determined by predictions of the mutations’ functions. RESULTS: A novel homozygous frameshift mutation [NM_000440.2:c.1054delG, p. (Gln352Argfs*4); Chr5:g.149286886del (GRCh37)] in the PDE6A gene in an endogamous family and a novel homozygous splice site mutation [NM_033100.3:c.1168-1G>A, Chr10:g.85968484G>A (GRCh37)] in the CDHR1 gene in a consanguineous family were identified. The PDE6A variant p. (Gln352Argfs*4) was predicted to be deleterious or pathogenic, whilst the CDHR1 variant c.1168-1G>A was predicted to result in potential alteration of splicing. CONCLUSION: This study expands the spectrum of genetic variants for arRP in Pakistani families.

Novel splice site mutation in the LIPH gene in a patient with autosomal recessive woolly hair/hypotrichosis: Case report and published work review

2018 ◽  
Vol 45 (5) ◽  
pp. 613-617 ◽  
Author(s):  
Yukari Mizukami ◽  
Ryota Hayashi ◽  
Daisuke Tsuruta ◽  
Yutaka Shimomura ◽  
Koji Sugawara
Keyword(s):  
Case Report ◽  
Splice Site ◽  
Autosomal Recessive ◽  
Splice Site Mutation ◽  
Site Mutation ◽  
Woolly Hair

scholarly journals Whole-exome sequencing reveals POC5 as a novel gene associated with autosomal recessive retinitis pigmentosa

2017 ◽  
Vol 27 (4) ◽  
pp. 614-624 ◽  
Author(s):  
Monika Weisz Hubshman ◽  
Sanne Broekman ◽  
Erwin van Wijk ◽  
Frans Cremers ◽  
Alaa Abu-Diab ◽  
...  
Keyword(s):  
Retinitis Pigmentosa ◽  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Autosomal Recessive ◽  
Novel Gene ◽  
Whole Exome

scholarly journals Striking Cardiac Phenotypic Variability in A Chinese Family With A MYH7 Splice Site Mutation

2021 ◽  
Author(s):  
Peng Tu ◽  
Hairui Sun ◽  
Xiaohang Zhang ◽  
Qian Ran ◽  
suzhen Ran ◽  
...  
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Splice Site ◽  
Phenotypic Variability ◽  
Splice Site Mutation ◽  
Left Ventricular ◽  
Chinese Family ◽  
Site Mutation ◽  
Cardiac Phenotype ◽  
Whole Exome

Abstract Background: Left ventricular non-compaction cardiomyopathy (LVNC) is a rare congenital heart defect (CHD), genetics defects have been found in patients with LVNC and their family members; and MYH7 is the most common genetic associated with LVNC. Methods: A trio (fetus and the parents) whole-exome sequencing (WES) was performed when the fetus was found with Ebstein's anomaly (EA), heart dilatation, perimembranous ventricular septal defects (VSD), mild seroperitoneum and single umbilical artery (SUA).Results: Whole-exome sequencing identified a maternal inherited heterozygous splice site mutation in MYH7 (NM_000257.3:c.732+1G>A). Subsequent Sanger sequencing confirmed that the mutation was heterozygous in the fetus, the old sister, the grandmother, and the mother. QPCR experiment using RNA from blood lymphocytes but were unable to amplify any product.Conclusion: This familial case underlines that the striking cardiac phenotypic of MYH7 mutation (the c.732+1G>A spice site variant) may be highly variable. The mechanistic studies which could uncover candidate genes modulating cardiac phenotype associated with LVNC/EA should be proceed.

scholarly journals Characterization of a Putative Founder Mutation that Accounts for the High Incidence of Cystinosis in Brittany

2001 ◽  
Vol 12 (10) ◽  
pp. 2170-2174
Author(s):  
VASILIKI KALATZIS ◽  
STÉPHANIE CHERQUI ◽  
GENEVIÈVE JEAN ◽  
BÉATRICE CORDIER ◽  
PIERRE COCHAT ◽  
...  
Keyword(s):  
Autosomal Recessive ◽  
Founder Mutation ◽  
Pcr Amplification ◽  
Splice Site Mutation ◽  
Autosomal Recessive Disorder ◽  
Site Mutation ◽  
Live Births ◽  
Reverse Transcription Pcr ◽  
High Incidence

Abstract. Cystinosis is an autosomal recessive disorder, characterized by an accumulation of intralysosomal cystine, with an incidence of 1 in 100,000 to 200,000 live births. A higher incidence of cystinosis, 1 in 26,000 live births, has been reported in the western French province of Brittany. PCR amplification and sequencing has identified a 27-bp deletion starting 3 bp before the end of exon 8 and continuing into intron 8, 898-900+24del27, which has only been detected in families from this region. Reverse transcription—PCR amplification of RNA from an affected individual has shown that this mutation is indeed a splice-site mutation and results in the production of aberrant transcripts. These transcripts are predicted to either severely truncate cystinosin or alter its topology, thus accounting for the severe phenotype of these individuals. The mutation 898-900+24del27 has been identified in 7 of 18 alleles studied. This mutation is likely to be a founder mutation and would account for the higher incidence of cystinosis in Brittany.1

scholarly journals Unexpected Genetic Cause in Two Female Siblings with High Myopia and Reduced Visual Acuity

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
M. N. Preising ◽  
C. Friedburg ◽  
W. Bowl ◽  
B. Lorenz
Keyword(s):  
Visual Acuity ◽  
High Myopia ◽  
Autosomal Recessive ◽  
Electrical Coupling ◽  
Splice Site Mutation ◽  
Bipolar Cells ◽  
Night Vision ◽  
Site Mutation ◽  
Frequent Finding ◽  
Biallelic Mutations

In daily life, myopia is a frequent cause of reduced visual acuity (VA) due to missing or incomplete optical correction. While the genetic cause of high myopia itself is not well understood, a significant number of cases are secondary to hereditary malfunctions or degenerations of the retina. The mechanism by which this occurs remains yet unclear. Two female siblings, 4 y and 2 y, respectively, from a consanguineous Pakistani family were referred to our department for reduced VA and strabismus. Both girls were highly myopic and hence were further examined using standard clinical tests and electroretinography (ERG). The latter confirmed confounded electrical coupling of photoreceptors and bipolar cells. Further inquiry and testing confirmed a similar condition for the father including impaired night vision, reduced VA, photophobia, and an equally characteristic ERG. Findings in the mother were unremarkable. Subsequent genetic analysis of autosomal recessive and X-linked genes for congenital stationary night blindness (CSNB) revealed a novel homozygous splice site mutation in CACNA1F in the two girls transmitted from both the father and the mother. While in males the above clinical constellation is a frequent finding, this report, to the authors’ knowledge, is the first demonstrating biallelic mutations at the CACNA1F locus in females.

A novel ARH splice site mutation in a Mexican kindred with autosomal recessive hypercholesterolemia

2004 ◽  
Vol 116 (1-2) ◽  
pp. 114-120 ◽  
Author(s):  
Samuel Canizales-Quinteros ◽  
Carlos A. Aguilar-Salinas ◽  
Adriana Huertas-Vázquez ◽  
María L. Ordóñez-Sánchez ◽  
Maribel Rodríguez-Torres ◽  
...  
Keyword(s):  
Splice Site ◽  
Autosomal Recessive ◽  
Splice Site Mutation ◽  
Site Mutation ◽  
Autosomal Recessive Hypercholesterolemia

scholarly journals Whole exome sequencing identifies a novel homozygous frameshift mutation in the ASPM gene, which causes microcephaly 5, primary, autosomal recessive

F1000Research ◽  
2017 ◽  
Vol 6 ◽  
pp. 2163
Author(s):  
Desaraju Suresh Bhargav ◽  
N. Sreedevi ◽  
N. Swapna ◽  
Soumya Vivek ◽  
Srinivas Kovvali
Keyword(s):  
Exome Sequencing ◽  
Autosomal Recessive ◽  
Frameshift Mutation ◽  
Protein Gene ◽  
Single Gene ◽  
Primary Microcephaly ◽  
Sequencing Technologies ◽  
Whole Exome ◽  
The Family ◽  
Autosomal Recessive Primary Microcephaly

Microcephaly is a genetically heterogeneous disorder and is one of the frequently notable conditions in paediatric neuropathology which exists either as a single entity or in association with other co-morbidities. More than a single gene is implicated in true microcephaly and the list is growing with the recent advancements in sequencing technologies. Using massive parallel sequencing, we identified a novel frame shift insertion in the abnormal spindle-like microcephaly-associated protein gene in a client with true autosomal recessive primary microcephaly.  Exome sequencing in the present case helped in identifying the true cause behind the disease, which helps in the premarital counselling for the sibling to avoid future recurrence of the disorder in the family.

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