scholarly journals Phenotypic expression and founder effect of PANK2 c.1583C>T (p.T528M) mutation in Serbian pantothenate kinase-associated neurodegeneration patients

2019 ◽  
Vol 71 (2) ◽  
pp. 275-280
Author(s):  
Marina Svetel ◽  
Monika Hartig ◽  
Dragana Cvetkovic ◽  
Cyrielle Beaubois ◽  
Jasmina Maksic ◽  
...  
Keyword(s):  
Founder Effect ◽  
Autosomal Recessive ◽  
Common Ancestor ◽  
Phenotypic Expression ◽  
Autosomal Recessive Disorder ◽  
Clinical Findings ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Pantothenate Kinase ◽  
The Brain

Pantothenate kinase-associated neurodegeneration (PKAN) is an autosomal recessive disorder characterized by dystonia, parkinsonism, cognitive and visual impairment, and iron accumulation in the brain. Many cases of PKAN result from mutations in the PANK2 gene that encodes pantothenate kinase 2, a key regulatory enzyme in the biosynthesis of coenzyme A. We previously detected six Serbian patients with clinically suggestive PKAN, all of whom had PANK2 c.1583C>T (p.T528M) mutation either in the homozygous or in the heterozygous state. In this study we explored the phenotypic expression and a possible founder effect of this substitution. We performed the analysis of linkage disequilibrium (LD) and organization in haplotypes of 23 single nucleotide polymorphisms (SNPs) adjacent to the PANK2 gene in all of the six patients and their parents, as well as in control healthy child-parents trios. The age of PANK2 c.1583C>T mutation was determined using the r2 degeneration method. Clinical findings in our patients were markedly similar. Different LD structures between patients and controls is revealed, and PANK2 c.1583T allele was significantly associated with a particular haplotype. The age of PANK2 c.1583C>T mutation was estimated to be about 15 generations. Our results suggest that PANK2 c.1583C>T in Serbian PKAN patients represents a founder mutation descended from one common ancestor.

Ellis-van Creveld Syndrome and Dyserythropoiesis

2005 ◽  
Vol 129 (5) ◽  
pp. 680-682 ◽  
Author(s):  
Deven Scurlock ◽  
Daniel Ostler ◽  
Andy Nguyen ◽  
Amer Wahed
Keyword(s):  
Myelodysplastic Syndrome ◽  
Autosomal Recessive ◽  
Ectodermal Dysplasia ◽  
Case Reports ◽  
Clinical Manifestations ◽  
Autosomal Recessive Disorder ◽  
Clinical Findings ◽  
Cardiac Defects ◽  
Ellis Van Creveld Syndrome ◽  
Syndrome Association

Abstract Ellis-van Creveld (EVC) syndrome or chondroectodermal dysplasia is a rare autosomal recessive disorder characterized by a variable spectrum of clinical findings. Classical EVC syndrome comprises a tetrad of clinical manifestations of chondrodystrophy, polydactyly, ectodermal dysplasia, and cardiac defects. In several case reports, dysplasia involving other organs has also been identified. Hematologic abnormalities have been rarely reported in patients with EVC syndrome. Here, we report a case of a 3-year-old Hispanic boy with EVC syndrome and marked dyserythropoiesis. The dyserythropoiesis may be part of an isolated myelodysplastic change or a primary myelodysplastic syndrome and likely represents an unusual EVC syndrome association. To our knowledge, this association has not been previously reported.

scholarly journals Warmblood fragile foal syndrome causative single nucleotide polymorphism frequency in horses in Ireland

2021 ◽  
Vol 74 (1) ◽  
Author(s):  
Áine Rowe ◽  
Sharon Flanagan ◽  
Gerald Barry ◽  
Lisa M. Katz ◽  
Elizabeth A. Lane ◽  
...  
Keyword(s):  
Autosomal Recessive ◽  
Scientific Literature ◽  
Genetic Test ◽  
Low Frequency ◽  
Autosomal Recessive Disorder ◽  
Causative Mutation ◽  
Nucleotide Polymorphism ◽  
Single Nucleotide ◽  
Hair Samples ◽  
Heterozygous Carriers

Abstract Background Warmblood Fragile Foal Syndrome (WFFS) is an autosomal recessive disorder caused by a mutation in the procollagen-lysine, 2-oxoglutarate 5-dioxygenase 1 (PLOD1) gene. Homozygosity for the mutation results in defective collagen synthesis which clinically manifests as the birth of non viable or still born foals with abnormally fragile skin. While the mutation has been identified in non Warmblood breeds including the Thoroughbred, to date all homozygous clinically affected cases reported in the scientific literature are Warmblood foals. The objective of this study was to investigate the carrier frequency of the mutation in the Thoroughbred and sport horse populations in Ireland. Methods A test was developed at the UCD School of Veterinary Medicine using real-time PCR to amplify the PLOD1 gene c.2032G > A variant. A subset of the samples was also submitted to an external laboratory with a licensed commercial WFFS genetic test. Results Warmblood Fragile Foal Syndrome genotyping was performed on hair samples from 469 horses representing 6 different breeds. Six of 303 (1.98%) sport horses tested and three of 109 (2.75%) Thoroughbreds tested were heterozygous for the WFFS polymorphism (N/WFFS). The WFFS polymorphism was not identified in the Standardbred, Cob, Connemara, or other pony breeds. Conclusions The study identified a low frequency of the WFFS causative mutation in sport horses and Thoroughbreds in Ireland, highlighting the importance of WFFS genetic testing in order to identify phenotypically normal heterozygous carriers and to prevent the birth of nonviable foals.

Hypomyelination and Congenital Cataract: Clinical, Imaging, and Genetic Findings in Three Tunisian Families and Literature Review

2021 ◽  
Author(s):  
Yosra Bouyacoub ◽  
Cyrine Drissi ◽  
Ichraf Kraoua ◽  
Mariem Chargui ◽  
Ibtihel Rebai ◽  
...  
Keyword(s):  
Autosomal Recessive ◽  
Congenital Cataract ◽  
Direct Sequencing ◽  
Autosomal Recessive Disorder ◽  
Resonance Imaging ◽  
Neurologic Impairment ◽  
Tunisian Patients ◽  
Myelin Deficiency ◽  
The Brain ◽  
Genotype Correlation

AbstractHypomyelination and congenital cataract (HCC) is characterized by congenital cataract, progressive neurologic impairment, and diffuse myelin deficiency. This autosomal recessive disorder is caused by homozygous variant in the FAM126A gene. Five consanguineous Tunisian patients, belonging to three unrelated families, underwent routine blood tests, electroneuromyography, and magnetic resonance imaging of the brain. The direct sequencing of FAM126A exons was performed for the patients and their relatives. We summarized the 30 previously published HCC cases. All of our patients were carriers of a previously reported c.414 + 1G > T (IVS5 + 1G > T) variant, but the clinical spectrum was variable. Despite the absence of a phenotype–genotype correlation in HCC disease, screening of this splice site variant should be performed in family members at risk.

scholarly journals Pantothenate kinase-associated neurodegeneration: Clinical aspects, diagnosis and treatments

2018 ◽  
Vol 10 (1) ◽  
Author(s):  
Saeed Razmeh ◽  
Amir Hassan Habibi ◽  
Maryam Orooji ◽  
Elham Alizadeh ◽  
Karim Moradiankokhdan ◽  
...  
Keyword(s):  
Autosomal Recessive ◽  
Clinical Presentation ◽  
Iron Chelation ◽  
Autosomal Recessive Disorder ◽  
Intrathecal Baclofen ◽  
Clinical Aspects ◽  
Hyperintense Lesion ◽  
Pantothenate Kinase ◽  
Generalized Dystonia ◽  
Deep Brain

Pantothenate Kinase-Associated Neurodegeneration (PKAN) is an autosomal recessive disorder characterized by a mutation in the PANK2 gene. The clinical presentation may range from only speech disorder to severe generalized dystonia, spasticity, Visual loss, dysphagia and dementia. The hallmark of this disease is eyes of the tiger sign in the medial aspect of bilateral globus pallidus on T2-weighted MRI that is a hyperintense lesion surrounded by hypointensity. Common treatments for PKAN disease include anticholinergics, botulinum toxin, Oral and Intrathecal baclofen, Iron chelation drugs and surgical procedures such as ablative pallidotomy or thalamotomy, Deep brain stimulation. There are many controversies about the pathogenesis and treatment of this disease, and in recent years interesting studies have been done on PKAN disease and other similar diseases. This review summarizes the clinical presentation, etiology, imaging modalities and treatment.

scholarly journals Genetic Analysis of 25 Patients with 5α-Reductase Deficiency in Chinese Population

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Bing Han ◽  
Tong Cheng ◽  
Hui Zhu ◽  
Jie Yu ◽  
Wen-jiao Zhu ◽  
...  
Keyword(s):  
Chinese Population ◽  
Autosomal Recessive Disorder ◽  
Ambiguous Genitalia ◽  
Chinese Patients ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Reductase Deficiency ◽  
Significant Difference ◽  
Hotspot Mutations

Background. A deficiency in steroid 5α-reductase type 2 is an autosomal recessive disorder. Affected individuals manifested ambiguous genitalia, which is caused by decreased dihydrotestosterone (DHT) synthesis in the fetus. Methods. We analyzed 25 patients with 5α-reductase deficiency in China. Seventeen of the 25 patients (68%) were initially raised as females. Sixteen patients changed their social gender from female to male after puberty. Results. Eighteen mutations were identified in these patients. p.Gly203Ser and p.Gln6∗ were found to be the most prevalent mutations. On the basis of the genotype of these patients, we divided them into different groups. There was no significant difference in hormone levels and external masculinization score (EMS) in patients with or without these prevalent mutations. Twelve common single-nucleotide polymorphisms (SNPs) near the p.Gln6∗ mutation were chosen for haplotype analysis. Three haplotypes were observed in 6 patients who had the p.Gln6∗ mutation (12 alleles). Conclusion. We analyzed mutations of the SRD5A2 gene in Chinese patients with 5α-reductase deficiency. Although hotspot mutations exist, no founder effect of prevalent mutations in the SRD5A2 gene was detected in the Chinese population.

Association Between Two Single-nucleotide Polymorphism of TAAR1 Gene and Suicide Attempts

2017 ◽  
Vol 41 (S1) ◽  
pp. S103-S103
Author(s):  
A. Zdanowicz ◽  
A. Sakowicz ◽  
E. Kusidel ◽  
P. Wierzbinski
Keyword(s):  
Suicide Attempts ◽  
Statistical Tests ◽  
Control Group ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Hardy Weinberg Equilibrium ◽  
The Mean ◽  
Competing Interest ◽  
G Protein Coupled ◽  
The Brain

IntroductionTAAR1 is a G protein-coupled receptor expressed broadly throughout the brain. Recently, TAAR1 has been demonstrated to be an important modulator of the dopaminergic, serotonergic and glutamatergic activity.AimsAssessment of the relation between two single-nucleotide polymorphisms of TAAR1 gene, suicide attempts and alcohol abuse.MethodsA total of 150 Polish patients were included, 59 subjects after suicide attempt vs. 91 controls. The chosen SNPs (rs759733834 and rs9402439) were studied using RFLP-PCR methods. The Hardy-Weinberg equilibrium was tested in control group.Statistical testsChi2 or Yeates Chi2 Test were used.ResultsThe mean age of study subjects and controls was: 38 ± 12.3 and 42 ± 12.8 respectively; 49% study males vs. 54% male controls. We did not observe the association between the carriage of the genotypes GG, GA and AA of rs759733834 polymorphisms in either of the groups. The distribution of genotypes in respect to rs9402439 polymorphism (CC, CG, GG) was also insignificant. Among patients with alcohol dependence, the frequency G allele of rs9402439 polymorphism was lower compared to non-addicted ones (27 vs. 47%) P < 0.01.ConclusionsTAAR1 polymorphisms rs759733834 and rs9402439 are not related to suicide attempts. The carriage of allele G of rs9402439 polymorphism is related to lower risk of alcohol addiction OR 0.40 95%Cl 0.20–0.81. To our knowledge, this is the first study on the TAAR1 receptor and the risk of suicide and it might offer a new insight into genetic etiology of TAAR1 receptor.Disclosure of interestThe authors have not supplied their declaration of competing interest.

scholarly journals Compound heterozygous variants in the ABCG8 gene in a Japanese girl with sitosterolemia

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Nobuhiro Hashimoto ◽  
Sumito Dateki ◽  
Eri Suzuki ◽  
Takatoshi Tsuchihashi ◽  
Aiko Isobe ◽  
...  
Keyword(s):  
Plant Sterol ◽  
Autosomal Recessive ◽  
Elevated Serum ◽  
Asian Population ◽  
Autosomal Recessive Disorder ◽  
Compound Heterozygous ◽  
Heterozygous State ◽  
Single Nucleotide ◽  
Compound Heterozygous Variants ◽  
Compound Heterozygous State

AbstractSitosterolemia is an autosomal recessive disorder that affects lipid metabolism and is characterized by elevated serum plant sterol levels, xanthomas, and accelerated atherosclerosis. In this study, we report a novel nonsense single-nucleotide variant, c.225G > A (p.Trp75*), and an East Asian population-specific missense multiple-nucleotide variant, c.1256_1257delTCinsAA (p.Ile419Lys), in the ABCG8 gene in a compound heterozygous state observed in a Japanese girl with sitosterolemia.

scholarly journals A pilot trial of deferiprone in pantothenate kinase-associated neurodegeneration patients

2018 ◽  
Vol 9 (4) ◽  
Author(s):  
Mohammad Rohani ◽  
Saeed Razmeh ◽  
Gholam Ali Shahidi ◽  
Maryam Orooji
Keyword(s):  
Autosomal Recessive ◽  
Rating Scales ◽  
Autosomal Recessive Disease ◽  
Pilot Trial ◽  
Qualitative Evaluation ◽  
Iron Chelator ◽  
Pantothenate Kinase ◽  
Iron Load ◽  
Magnetic Resonance Imaging Mri ◽  
The Brain

Pantothenate kinase-associated neurodegeneration (PKAN) is the most common form of neurodegeneration with brain iron accumulation, it is an autosomal recessive disease due to mutation in PANK 2 on chromosome 20, which causes the accumulation of iron in basal ganglia and production of free radicals that cause degeneration of the cells. Deferiprone is an iron chelator that was used in treatment of thalassemia patients, it can cross the blood-brain barrier and reverse the iron deposition in the brain. Five patients with genetically confirmed PKAN received 15 mg/kg deferiprone twice daily. All patients were examined at baseline, 12 and 18 months and magnetic resonance imaging (MRI) was done at the baseline and after 18 months. In our study qualitative evaluation of MRI showed that deferiprone was able to reduce the iron load in globus pallidus of all the patients and the results of clinical rating scales show that in four patients, there is an improvement in the first 12 months. The results of our paper show that deferiprone can prevent the progression of the disease.

scholarly journals Molecular analyses in Indonesian individuals with intellectual disability and microcephaly

2013 ◽  
Vol 53 (2) ◽  
pp. 83
Author(s):  
Farmaditya EP Mundhofir ◽  
Rahajeng N Tunjungputri ◽  
Willy M Nillesen ◽  
Bregje WM Van Bon ◽  
Martina Ruiterkamp-Versteeg ◽  
...  
Keyword(s):  
Intellectual Disability ◽  
Autosomal Recessive ◽  
Brain Size ◽  
Fragile X ◽  
Monozygotic Twin ◽  
Regulatory Subunit ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Pathogenic Mutations ◽  
Subtelomeric Deletion

Background Intellectual disability (ID) often coincides with anabnormal head circumference (HC). Since the HC is a reflectionof brain size, abnormalities in HC may be a sign of a brain anomaly.Although microcephaly is often secondary to ID, hereditary(autosomal recessive) forms of primary microcephaly (MCPH)exist that result in ID.Objective To investigate mutations in MCPH genes in patientswith ID and microcephaly.Methods From a population of 527 Indonesian individuals withID, 48 patients with microcephaly (9.1 %) were selected. Thesepatients were previously found to be normal upon conventionalkaryotyping, fragile X mental retardation 1 (FMRl) gene analysis,subtelomeric deletion, and duplication multiplex ligationdependentprobe amplification (MLPA). Sanger sequencing forabnormal spindle-like microcephaly-associated (ASPM) and WDrepeat domain 62 (WDR62) was performed in all 48 subjects, whilesequencing for microcephalin (MCPHl), cyclin-dependent kinase5 (CDK5) regulatory subunit-associated protein 2 (CD5KRAP2) ,centromere protein} (CENPJ), and SCUfALl interrupting locus(STIL) was conducted in only the subjects with an orbitofrontalcortex (OFC) below -4 SD.Results In all genes investigated, 66 single nucleotide polymorphisms(SNPs) and 15 unclassified variants which were predictedas unlikely to be pathogenic (lN2), were identified. Possiblepathogenic variants (lN3) were identified in ASPM. However,since none of the patients harboured compound heterozygouslikely pathogenic mutations, no molecular MCPH diagnosis couldbe established. Interestingly, one of the patients harboured thesame variants as her unaffected monozygotic twin sister, indicatingthat our cohort included a discordant twin.Conclusions This study is the first to investigate for possible geneticcauses ofMCPH in the Indonesian population. The absenceof causative pathogenic mutations in the MCPH genes tested may originate from several factors. The identification of UV2and UV3 variants as well as the absence of causative pathogenicmutations calls for further investigations.

Sign in / Sign up

Export Citation Format

Share Document