scholarly journals FIG4-Associated Yunis-Varon Syndrome: Identification of a Novel Missense Variant

2021 ◽  
pp. 1-7
Author(s):  
Muhammad Umair ◽  
Turki M. Alkharfy ◽  
Sajida Sajjad ◽  
Majid Alfadhel
Keyword(s):  
Skeletal Muscles ◽  
Autosomal Recessive ◽  
Clinical Manifestations ◽  
Autosomal Recessive Disorder ◽  
Missense Variant ◽  
Cleidocranial Dysplasia ◽  
Gene Encoding ◽  
Phosphoinositide Phosphatase ◽  
Whole Exome ◽  
Poor Outcomes

Yunis-Varon syndrome (YVS; OMIM 216340) is a rare heterogeneous autosomal recessive disorder with easy recognition of characteristic severe neurological and skeletal abnormalities involving skeletal muscles and cartilages. This cleidocranial dysplasia is characterized by bone and tooth disorders; it also affects the cardiovascular system and tissues from ectoderm with very poor outcomes. Rarely, mutations of the <i>FIG4</i> gene, encoding a 50-phosphoinositide phosphatase have been identified as the cause for YVS. We report a neonate born to a consanguineous couple with typical clinical manifestations of YVS. Using whole-exome sequencing, we identified a novel homozygous missense variant (c.968A&#x3e;G; p.Gln323Arg) in the <i>FIG4</i> gene. Thus, our study expands the molecular and genetic spectrum of <i>FIG4</i>-associated mutations. To our knowledge, this is the first reported case of YVS from the Saudi population.

3-M syndrome – a primordial short stature disorder with novel CUL7 mutation in two Indian patients

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Radha Rama Devi Akella
Keyword(s):  
Short Stature ◽  
Autosomal Recessive ◽  
Genetic Diagnosis ◽  
Autosomal Recessive Disorder ◽  
Missense Variant ◽  
Postnatal Growth ◽  
Compound Heterozygous ◽  
Case Presentation ◽  
Whole Exome ◽  
Heterozygous Variant

Abstract Objective To evaluate the cause of short stature in children. Case presentation Two children with suspected skeletal dysplasia and short stature were evaluated. Conclusions The 3-M syndrome is a primordial growth disorder manifesting severe postnatal growth restriction, skeletal anomalies and prominent fleshy heels. The 3-M syndrome is a genetically heterogeneous disorder and the phenotype is similar. This is a rare autosomal recessive disorder with normal intellect. Two affected children have been identified by whole-exome sequencing. One patient harboured a compound heterozygous variant and the other was a homozygous missense variant. The genetic diagnosis helped in counselling the families and facilitated prenatal diagnosis in one (case 1) family.

Papillon-Lefevre Syndrome: Challenge for Periodontal Management

2019 ◽  
Vol 3 (2) ◽  
pp. 84-86
Author(s):  
Krishna Prasad Lamichhane ◽  
Shaili Pradhan ◽  
Ranjita Shreshta Gorkhali ◽  
Pramod Kumar Koirala
Keyword(s):  
Significant Role ◽  
Autosomal Recessive ◽  
Clinical Manifestations ◽  
Autosomal Recessive Disorder ◽  
Genetic Mutations ◽  
Rare Autosomal Recessive Disorder ◽  
Diagnosis And Management ◽  
Periodontal Destruction ◽  
Palmoplantar Keratosis

Papillon-Lefèvre syndrome (PLS) is a rare autosomal recessive disorder associated with rapidly progressing periodontitis leading to premature loss of deciduous and permanent dentition and diffuse palmoplantar keratosis. Immunologic alterations, genetic mutations, and role of bacteria are some aetiologic factors. Patients present with early periodontal destruction, so periodontists play a significant role in diagnosis and management. This paper reports a case of Papillon- Lefevre syndrome with its clinical manifestations and challenges for periodontal management which was diagnosed in dental department.

scholarly journals Myophosphorylase deficiency (McArdle disease) in a patient with normal pregnancy and normal pregnancy outcome

2011 ◽  
Vol 4 (3) ◽  
pp. 120-121 ◽  
Author(s):  
Warwick Giles ◽  
Catherine Maher
Keyword(s):  
Skeletal Muscles ◽  
Autosomal Recessive ◽  
Autosomal Recessive Disorder ◽  
Normal Pregnancy ◽  
Significant Rise ◽  
Women Of Childbearing Age ◽  
Childbearing Age ◽  
Fetal Head ◽  
Mcardle Disease ◽  
Exercise Induced

McArdle disease is a rare, mostly autosomal recessive disorder of deficient myophosphorylation of glycogen in skeletal muscles. Recent knowledge regarding this condition means that women of childbearing age with McArdle disease can expect to labour normally without ill effect. We report a case of a 30-year-old woman in her first pregnancy who had an episode of exercise-induced myoglobinuria with a significant rise in serum creatine kinase (CK) levels in early pregnancy who then laboured normally but did require a caesarean section for a malposition of the fetal head.

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 Novel homozygous variant in the TPO gene associated with congenital hypothyroidism and mild-intellectual disability

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Amjad Khan ◽  
Muhammad Umair ◽  
Rania Abdulfattah Sharaf ◽  
Muhammad Ismail Khan ◽  
Amir Ullah ◽  
...  
Keyword(s):  
Intellectual Disability ◽  
Congenital Hypothyroidism ◽  
Autosomal Recessive ◽  
Missense Variant ◽  
Thyroid Peroxidase ◽  
Mild Intellectual Disability ◽  
Complex Disorder ◽  
Whole Exome ◽  
Hereditary Disorders ◽  
Autosomal Recessive Manner

AbstractCongenital hypothyroidism (CH) is one of the most common hereditary disorders affecting neonates worldwide. CH is a multifactorial complex disorder and can be caused by either environmental factors or genetic factors. We studied one Pakistani family with segregating mutations in CH inherited in an autosomal recessive manner. Using whole-exome sequencing (WES), we found a novel homozygous missense variant (c.2315A>G; p.Tyr772Cys) in the thyroid peroxidase (TPO) gene. Different bioinformatics prediction tools and Sanger sequencing were performed to verify the identified variant. Our findings highlight the importance of this gene in causing CH and mild-intellectual disability (ID) in two affected brothers. WES is a convenient and useful tool for the clinical diagnosis of CH and other associated disorders.

Mutations in the ELA2 gene encoding neutrophil elastase are present in most patients with sporadic severe congenital neutropenia but only in some patients with the familial form of the disease

Blood ◽  
2001 ◽  
Vol 98 (9) ◽  
pp. 2645-2650 ◽  
Author(s):  
Phil J. Ancliff ◽  
Rosemary E. Gale ◽  
Ri Liesner ◽  
Ian M. Hann ◽  
David C. Linch
Keyword(s):  
Neutrophil Elastase ◽  
Autosomal Recessive ◽  
Autosomal Dominant ◽  
Autosomal Recessive Disorder ◽  
Severe Neutropenia ◽  
Base Substitution ◽  
Severe Congenital Neutropenia ◽  
Congenital Neutropenia ◽  
Gene Encoding ◽  
Familial Form

Abstract Severe congenital neutropenia (SCN) was originally described as an autosomal recessive disorder. Subsequently, autosomal dominant and sporadic forms of the disease have been recognized. All forms are manifest by persistent severe neutropenia and recurrent bacterial infection. In contrast, cyclical hematopoiesis is characterized by periodic neutropenia inter-spaced with (near) normal neutrophil counts. Recently, linkage analysis on 13 affected pedigrees identified chromosome 19p13.3 as the likely position for mutations in cyclical hematopoiesis. Heterozygous mutations in the ELA2 gene encoding neutrophil elastase were detected in all families studied. Further work also demonstrated mutations in ELA2 in sporadic and autosomal dominant SCN. However, all mutations described to date are heterozygous and thus appear to act in a dominant fashion, which is inconsistent with an autosomal recessive disease. Therefore, the current study investigated whether mutations in ELA2could account for the disease phenotype in classical autosomal recessive SCN and in the sporadic and autosomal dominant types. All 5 exons of ELA2 and their flanking introns were studied in 18 patients (3 autosomal recessive, 5 autosomal dominant [from 3 kindreds], and 10 sporadic) using direct automated sequencing. No mutations were found in the autosomal recessive families. A point mutation was identified in 1 of 3 autosomal dominant families, and a base substitution was identified in 8 of 10 patients with the sporadic form, though 1 was subsequently shown to be a low-frequency polymorphism. These results suggest that mutations in ELA2are not responsible for classical autosomal recessive Kostmann syndrome but provide further evidence for the role of ELA2 in SCN.

scholarly journals Biallelic inheritance in a single Pakistani family with intellectual disability implicates new candidate gene RDH14

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Stephen F. Pastore ◽  
Tahir Muhammad ◽  
Ricardo Harripaul ◽  
Rebecca Lau ◽  
Muhammad Tariq Masood Khan ◽  
...  
Keyword(s):  
Intellectual Disability ◽  
Autosomal Recessive ◽  
Ion Homeostasis ◽  
Cerebellar Atrophy ◽  
Chloride Ion ◽  
Hek293 Cells ◽  
Retinol Dehydrogenase ◽  
Gene Encoding ◽  
Whole Exome ◽  
Transcription Data

AbstractIn a multi-branch family from Pakistan, individuals presenting with palmoplantar keratoderma segregate in autosomal dominant fashion, and individuals with intellectual disability (ID) segregate in apparent autosomal recessive fashion. Initial attempts to identify the ID locus using homozygosity-by-descent (HBD) mapping were unsuccessful. However, following an assumption of locus heterogeneity, a reiterative HBD approach in concert with whole exome sequencing (WES) was employed. We identified a known disease-linked mutation in the polymicrogyria gene, ADGRG1, in two affected members. In the remaining two (living) affected members, HBD mapping cross-referenced with WES data identified a single biallelic frameshifting variant in the gene encoding retinol dehydrogenase 14 (RDH14). Transcription data indicate that RDH14 is expressed in brain, but not in retina. Magnetic resonance imaging for the individuals with this RDH14 mutation show no signs of polymicrogyria, however cerebellar atrophy was a notable feature. RDH14 in HEK293 cells localized mainly in the nucleoplasm. Co-immunoprecipitation studies confirmed binding to the proton-activated chloride channel 1 (PACC1/TMEM206), which is greatly diminished by the mutation. Our studies suggest RDH14 as a candidate for autosomal recessive ID and cerebellar atrophy, implicating either disrupted retinoic acid signaling, or, through PACC1, disrupted chloride ion homeostasis in the brain as a putative disease mechanism.

scholarly journals Congenital adrenal hyperplasia due to 11β-hydroxylase deficiency: late diagnosis and gender reassignment in a two-year-old child

2021 ◽  
Vol 67 (5) ◽  
pp. 53-57
Author(s):  
N. Yu. Raygorodskaya ◽  
E. P. Novikova ◽  
A. N. Tyulpakov ◽  
M. A. Kareva ◽  
N. A. Nikolaeva ◽  
...  
Keyword(s):  
Autosomal Recessive ◽  
Clinical Case ◽  
Clinical Manifestations ◽  
Autosomal Recessive Disorder ◽  
Compound Heterozygous ◽  
Adrenal Hyperplasia ◽  
Hydroxylase Deficiency ◽  
Gender Reassignment ◽  
And Gender ◽  
21 Hydroxylase Deficiency

11β-hydroxylase deficiency is a rare autosomal recessive disorder due to impaired steroidogenesis in the adrenal cortex caused by pathogenic mutations in the CYP11B1 gene. The main clinical manifestations are determined by a deficiency of cortisol, ACTH hyperproduction, excessive androgens secretion and the accumulation of 11-deoxycorticosterone, which leads to the development of arterial hypertension. In the diagnostic search, it is important to take into account the ethnicity of the patient, since the frequency of the disease and the prevalence of mutations differ between ethnic groups. The article presents a clinical case of 11β-hydroxylase deficiency as the result of compound heterozygous mutations in the CYP11B1 gene in a patient of Turkic origin. This case shows the clinical manifestations and the development of complications of 11β-hydroxylase deficiency, the stages of differential diagnosis of patients with 21-hydroxylase deficiency.

scholarly journals Compound heterozygous inheritance of two novel COQ2 variants results in familial coenzyme Q deficiency

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Aliaa H. Abdelhakim ◽  
Avinash V. Dharmadhikari ◽  
Sara D. Ragi ◽  
Jose Ronaldo Lima de Carvalho ◽  
Christine L. Xu ◽  
...  
Keyword(s):  
Coenzyme Q ◽  
Clinical Manifestations ◽  
Missense Variant ◽  
Neurological Involvement ◽  
Cone Dystrophy ◽  
Compound Heterozygous ◽  
Pathogenic Variants ◽  
Whole Exome ◽  
Compound Heterozygous Variants ◽  
End Stage

Abstract Background Primary coenzyme Q10 deficiency is a rare disease that results in diverse and variable clinical manifestations. Nephropathy, myopathy and neurologic involvement are commonly associated, however retinopathy has also been observed with certain pathogenic variants of genes in the coenzyme Q biosynthesis pathway. In this report, we describe a novel presentation of the disease that includes nephropathy and retinopathy without neurological involvement, and which is the result of a compound heterozygous state arising from the inheritance of two recessive potentially pathogenic variants, previously not described. Materials and methods Retrospective report, with complete ophthalmic examination, multimodal imaging, electroretinography, and whole exome sequencing performed on a family with three affected siblings. Results We show that affected individuals in the described family inherited two heterozygous variants of the COQ2 gene, resulting in a frameshift variant in one allele, and a predicted deleterious missense variant in the second allele (c.288dupC,p.(Ala97Argfs*56) and c.376C > G,p.(Arg126Gly) respectively). Electroretinography results were consistent with rod-cone dystrophy in the affected individuals. All affected individuals in the family exhibited the characteristic retinopathy as well as end-stage nephropathy, without evidence of any neurological involvement. Conclusions We identified two novel compound heterozygous variants of the COQ2 gene that result in primary coenzyme Q deficiency. Targeted sequencing of coenzyme Q biosynthetic pathway genes may be useful in diagnosing oculorenal clinical presentations syndromes not explained by more well known syndromes (e.g., Senior-Loken and Bardet-Biedl syndromes).

scholarly journals Identification of two novel pathogenic variants of PIBF1 by whole exome sequencing in a 2-year-old boy with Joubert syndrome

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Yue Shen ◽  
Hao Wang ◽  
Zhimin Liu ◽  
Minna Luo ◽  
Siyu Ma ◽  
...  
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Autosomal Recessive ◽  
Autosomal Recessive Disorder ◽  
Autosomal Recessive Inheritance ◽  
Joubert Syndrome ◽  
Causative Gene ◽  
Pathogenic Variants ◽  
Whole Exome ◽  
Syndrome Individual

Abstract Background Joubert syndrome (OMIM 213300) is an autosomal recessive disorder with gene heterogeneity. Causal genes and their variants have been identified by sequencing or other technologies for Joubert syndrome subtypes. Case presentation A two-year-old boy was diagnosed with Joubert syndrome by global development delay and molar tooth sign of mid-brain. Whole exome sequencing was performed to detect the causative gene variants in this individual, and the candidate pathogenic variants were verified by Sanger sequencing. We identified two pathogenic variants (NM_006346.2: c.1147delC and c.1054A > G) of PIBF1 in this Joubert syndrome individual, which is consistent with the mode of autosomal recessive inheritance. Conclusion In this study, we identified two novel pathogenic variants in PIBF1 in a Joubert syndrome individual using whole exome sequencing, thereby expanding the PIBF1 pathogenic variant spectrum of Joubert syndrome.

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