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  1. Article ; Online: Biallelic variants in the synaptic vesicle glycoprotein 2 A are associated with epileptic encephalopathy.

    Al-Maawali, Almundher / Al-Murshedi, Fathiya / Al-Futaisi, Amna / Mansy, Ahmed / Al-Habsi, Asila / Girisha, Katta M

    European journal of human genetics : EJHG

    2023  Volume 32, Issue 2, Page(s) 243–246

    Abstract: Synaptic Vesicle Glycoprotein 2 A (SV2A) is a membrane protein of synaptic vesicles and the binding site of antiepileptic drug levetiracetam. Biallelic Arg383Gln is reported in a family with intractable epilepsy earlier. Here, we report on the second ... ...

    Abstract Synaptic Vesicle Glycoprotein 2 A (SV2A) is a membrane protein of synaptic vesicles and the binding site of antiepileptic drug levetiracetam. Biallelic Arg383Gln is reported in a family with intractable epilepsy earlier. Here, we report on the second family with early onset drug resistant epilepsy. We identified homozygous Arg289Ter variant by exome sequencing that segregated with the phenotype in the family. The affected children in these two families are normal at birth and developed recurrent seizures beginning in the second month of life and developed secondary failure of growth and development. Knock out mice models earlier had replicated the human phenotype observed in these two families. These findings support that biallelic loss of function variants in SV2A result in early onset intractable epilepsy in humans.
    MeSH term(s) Animals ; Child ; Humans ; Mice ; Anticonvulsants/metabolism ; Anticonvulsants/therapeutic use ; Drug Resistant Epilepsy ; Epilepsy/drug therapy ; Epilepsy/genetics ; Glycoproteins/genetics ; Glycoproteins/metabolism ; Synaptic Vesicles/genetics ; Synaptic Vesicles/metabolism
    Chemical Substances Anticonvulsants ; Glycoproteins ; SV2A protein, human (148845-93-6) ; Sv2a protein, mouse
    Language English
    Publishing date 2023-11-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 1141470-4
    ISSN 1476-5438 ; 1018-4813
    ISSN (online) 1476-5438
    ISSN 1018-4813
    DOI 10.1038/s41431-023-01493-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Syndrome of Inappropriate Antidiuretic Hormone Secretion in a Patient with Uncontrolled Tyrosinaemia Type 1.

    Al-Hinai, Abdulhamid / Al-Murshedi, Fathiya / Al-Nabhani, Dana / Al-Thihli, Khalid

    Sultan Qaboos University medical journal

    2021  Volume 21, Issue 2, Page(s) e312–e315

    Abstract: Syndrome of inappropriate antidiuretic hormone (SIADH) secretion is a recognisable complication of acute porphyria. We report a nine-year-old female patient with hereditary tyrosinaemia type 1 and poor adherence to nitisinone therapy who presented with ... ...

    Abstract Syndrome of inappropriate antidiuretic hormone (SIADH) secretion is a recognisable complication of acute porphyria. We report a nine-year-old female patient with hereditary tyrosinaemia type 1 and poor adherence to nitisinone therapy who presented with acute abdominal pain, vomiting and lethargy at Sultan Qaboos University Hospital, Muscat, Oman in 2016. She subsequently developed generalised tonic-clonic seizures attributable to severe hyponatremia that met the diagnostic criteria of SIADH. The acute porphyria screen also appeared positive. The patient responded well to fluid restriction and was discharged home without immediate neurological sequelae. Although acute porphyria is also a recognised complication of uncontrolled tyrosinaemia type 1, to the best of the authors' knowledge, no patient with tyrosinaemia type 1 has been reported to present with SIADH.
    MeSH term(s) Child ; Female ; Humans ; Hyponatremia/etiology ; Inappropriate ADH Syndrome/complications ; Inappropriate ADH Syndrome/diagnosis ; Oman ; Tyrosinemias/complications ; Tyrosinemias/diagnosis ; Vasopressins
    Chemical Substances Vasopressins (11000-17-2)
    Language English
    Publishing date 2021-06-21
    Publishing country Oman
    Document type Case Reports
    ZDB-ID 2650196-X
    ISSN 2075-0528 ; 2075-0528
    ISSN (online) 2075-0528
    ISSN 2075-0528
    DOI 10.18295/squmj.2021.21.02.023
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Hypoketotic hypoglycemia without neuromuscular complications in patients with SLC25A32 deficiency.

    Al Shamsi, Bushra / Al Murshedi, Fathiya / Al Habsi, Asila / Al-Thihli, Khalid

    European journal of human genetics : EJHG

    2021  Volume 30, Issue 8, Page(s) 976–979

    Abstract: Mitochondrial flavin adenine dinucleotide (FAD) transporter deficiencies are new entities recently reported to cause a neuro-myopathic phenotype. We report three patients from two unrelated families who presented primarily with hypoketotic hypoglycemia. ... ...

    Abstract Mitochondrial flavin adenine dinucleotide (FAD) transporter deficiencies are new entities recently reported to cause a neuro-myopathic phenotype. We report three patients from two unrelated families who presented primarily with hypoketotic hypoglycemia. They all had acylcarnitine profiles suggestive of multiple acyl-CoA dehydrogenase deficiency (MADD) with negative next-generation sequencing of electron-transfer flavoprotein genes (ETFA, ETFB, and ETFDH). Whole exome sequencing revealed a homozygous c.272 G > T (p.Gly91Val) variant in exon 2 of the SLC25A32 gene. The three patients shared the same variant, and they all demonstrated similar clinical and biochemical improvement with riboflavin supplementation. To date, these are the first patients to be reported with hypoketotic hypoglycemia without the neuromuscular phenotype previously reported in patients with SLC25A32 deficiency.
    MeSH term(s) Electron-Transferring Flavoproteins/genetics ; Electron-Transferring Flavoproteins/metabolism ; Humans ; Hypoglycemia/genetics ; Iron-Sulfur Proteins/genetics ; Membrane Transport Proteins/deficiency ; Membrane Transport Proteins/genetics ; Multiple Acyl Coenzyme A Dehydrogenase Deficiency/genetics ; Mutation ; Oxidoreductases Acting on CH-NH Group Donors/genetics ; Oxidoreductases Acting on CH-NH Group Donors/metabolism ; Riboflavin/metabolism
    Chemical Substances Electron-Transferring Flavoproteins ; Iron-Sulfur Proteins ; Membrane Transport Proteins ; SLC25A32 protein, human ; Oxidoreductases Acting on CH-NH Group Donors (EC 1.5.-) ; Riboflavin (TLM2976OFR)
    Language English
    Publishing date 2021-11-12
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 1141470-4
    ISSN 1476-5438 ; 1018-4813
    ISSN (online) 1476-5438
    ISSN 1018-4813
    DOI 10.1038/s41431-021-00995-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Underdiagnoses resulting from variant misinterpretation: Time for systematic reanalysis of whole exome data?

    Al-Murshedi, Fathiya / Meftah, Douja / Scott, Patrick

    European journal of medical genetics

    2018  Volume 62, Issue 1, Page(s) 39–43

    Abstract: Background: Clinical whole exome sequencing (WES) yields a diagnosis in approximately 30% of patients evaluated for presumed genetic disorders. For unsolved cases, periodic reanalysis is usually predicated on the availability of improved bioinformatics ... ...

    Abstract Background: Clinical whole exome sequencing (WES) yields a diagnosis in approximately 30% of patients evaluated for presumed genetic disorders. For unsolved cases, periodic reanalysis is usually predicated on the availability of improved bioinformatics tools or new gene discoveries.
    Methods: Exome data reanalysis was independently performed on unsolved cases that had underwent trio analysis by an external service provider. The retrieved exome data was reannotated using wANNOVAR and reanalysed following standard filtering criteria.
    Results: Independent reanalysis led to the identification of a disease-causing variation in two families segregating predominantly a neurological phenotype. As the causative genes were relatively well established at the time the WES referral was made, misinterpretation of the functional impact of the variant and/or underappreciation of the gene's associated phenotype are the most probable causes of the discrepancy in reporting.
    Conclusion: Non-diagnostic clinical exome resulting from variant misinterpretation is probably under appreciated. These results emphasise the relevance of implement a policy for the reanalysis of high-throughput sequencing data, especially in a clinical context given the implications.
    MeSH term(s) Alleles ; Child ; Child, Preschool ; Developmental Disabilities/genetics ; Developmental Disabilities/pathology ; False Negative Reactions ; Female ; Genetic Testing/methods ; Genetic Testing/standards ; Humans ; Intracellular Signaling Peptides and Proteins/genetics ; Male ; Membrane Proteins/genetics ; Pedigree ; Phosphoenolpyruvate Carboxykinase (GTP)/genetics ; Whole Exome Sequencing/methods ; Whole Exome Sequencing/standards
    Chemical Substances CLN6 protein, human ; Intracellular Signaling Peptides and Proteins ; Membrane Proteins ; PCK1 protein, human (EC 4.1.1.32) ; Phosphoenolpyruvate Carboxykinase (GTP) (EC 4.1.1.32)
    Language English
    Publishing date 2018-04-27
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2184135-4
    ISSN 1878-0849 ; 1769-7212
    ISSN (online) 1878-0849
    ISSN 1769-7212
    DOI 10.1016/j.ejmg.2018.04.016
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Revisiting Exome Data Identified Missed Splice Site Variant of the Asparagine Synthetase (

    Al-Kasbi, Ghalia / Al-Murshedi, Fathiya / Al-Futaisi, Amna / Al-Jabry, Tariq / Zadjali, Fahad / Al-Yahyaee, Said / Al-Maawali, Almundher

    Journal of pediatric genetics

    2022  Volume 13, Issue 1, Page(s) 1–5

    Abstract: Next-generation sequencing, such as whole-exome sequencing (WES), is increasingly used in the study of Mendelian disorders, yet many are reported as "negative." Inappropriate variant annotation and filtering steps are reasons for missing the molecular ... ...

    Abstract Next-generation sequencing, such as whole-exome sequencing (WES), is increasingly used in the study of Mendelian disorders, yet many are reported as "negative." Inappropriate variant annotation and filtering steps are reasons for missing the molecular diagnosis. Noncoding variants, including splicing mutations, are examples of variants that can be overlooked. Herein, we report a family of four affected newborns, and all presented with severe congenital microcephaly. Initial research WES analysis identified a damaging homozygous variant in
    Language English
    Publishing date 2022-10-13
    Publishing country Germany
    Document type Journal Article
    ISSN 2146-4596
    ISSN 2146-4596
    DOI 10.1055/s-0042-1757193
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Mitochondrial RNA processing defect caused by a SUPV3L1 mutation in two siblings with a novel neurodegenerative syndrome.

    van Esveld, Selma L / Rodenburg, Richard J / Al-Murshedi, Fathiya / Al-Ajmi, Eiman / Al-Zuhaibi, Sana / Huynen, Martijn A / Spelbrink, Johannes N

    Journal of inherited metabolic disease

    2022  Volume 45, Issue 2, Page(s) 292–307

    Abstract: SUPV3L1 encodes a helicase that is mainly localized in the mitochondria. It has been shown in vitro to possess both double-stranded RNA and DNA unwinding activity that is ATP-dependent. Here we report the first two patients for this gene who presented ... ...

    Abstract SUPV3L1 encodes a helicase that is mainly localized in the mitochondria. It has been shown in vitro to possess both double-stranded RNA and DNA unwinding activity that is ATP-dependent. Here we report the first two patients for this gene who presented with a homozygous preliminary stop codon resulting in a C-terminal truncation of the SUPV3L1 protein. They presented with a characteristic phenotype of neurodegenerative nature with progressive spastic paraparesis, growth restriction, hypopigmentation, and predisposition to autoimmune disease. Ophthalmological examination showed severe photophobia with corneal erosions, optic atrophy, and pigmentary retinopathy, while neuroimaging showed atrophy of the optic chiasm and the pons with calcification of putamina, with intermittent and mild elevation of lactate. We show that the amino acids that are eliminated by the preliminary stop codon are highly conserved and are predicted to form an amphipathic helix. To investigate if the mutation causes mitochondrial dysfunction, we examined fibroblasts of the proband. We observed very low expression of the truncated protein, a reduction in the mature ND6 mRNA species as well as the accumulation of double-stranded RNA. Lentiviral complementation with the full-length SUPV3L1 cDNA partly restored the observed RNA phenotypes, supporting that the SUPV3L1 mutation in these patients is pathogenic and the cause of the disease.
    MeSH term(s) Codon, Terminator ; DEAD-box RNA Helicases/genetics ; DNA, Mitochondrial/genetics ; Humans ; Mutation ; RNA, Double-Stranded ; RNA, Mitochondrial ; Siblings
    Chemical Substances Codon, Terminator ; DNA, Mitochondrial ; RNA, Double-Stranded ; RNA, Mitochondrial ; SUPV3L1 protein, human (EC 3.6.1.-) ; DEAD-box RNA Helicases (EC 3.6.4.13)
    Language English
    Publishing date 2022-01-21
    Publishing country United States
    Document type Case Reports ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 438341-2
    ISSN 1573-2665 ; 0141-8955
    ISSN (online) 1573-2665
    ISSN 0141-8955
    DOI 10.1002/jimd.12476
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  7. Article ; Online: Child With Congenital Generalized Lipodystrophy Type 4 for Electrophysiology Study and Catheter Ablation: Anesthetic Challenges.

    Al Aamri, Is'haq / Nagathan, Swaroopa Deepak / Al-Abri, Ismail Abdullah / Al Murshedi, Fathiya Mohammed / Maddali, Madan Mohan

    Journal of cardiothoracic and vascular anesthesia

    2022  Volume 36, Issue 11, Page(s) 4228–4229

    MeSH term(s) Anesthetics ; Catheter Ablation ; Child ; Electrophysiology ; Humans ; Lipodystrophy, Congenital Generalized
    Chemical Substances Anesthetics
    Language English
    Publishing date 2022-07-26
    Publishing country United States
    Document type Letter
    ZDB-ID 1067317-9
    ISSN 1532-8422 ; 1053-0770
    ISSN (online) 1532-8422
    ISSN 1053-0770
    DOI 10.1053/j.jvca.2022.07.026
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Expanding the clinical spectrum of cytosolic phosphoenolpyruvate carboxykinase deficiency: novel PCK1 variants in four Arabian Gulf families.

    Al Busaidi, Marwa / Mohamed, Feda E / Al-Ajmi, Eiman / Al Hashmi, Nadia / Al-Thihli, Khalid / Al Futaisi, Amna / Al Mamari, Watfa / Al-Murshedi, Fathiya / Al-Jasmi, Fatma

    Orphanet journal of rare diseases

    2023  Volume 18, Issue 1, Page(s) 344

    Abstract: Background: In metabolic stress, the cytosolic phosphoenolpyruvate carboxykinase (PEPCK-C) enzyme is involved in energy production through the gluconeogenesis pathway. PEPCK-C deficiency is a rare childhood-onset autosomal recessive metabolic disease ... ...

    Abstract Background: In metabolic stress, the cytosolic phosphoenolpyruvate carboxykinase (PEPCK-C) enzyme is involved in energy production through the gluconeogenesis pathway. PEPCK-C deficiency is a rare childhood-onset autosomal recessive metabolic disease caused by PCK1 genetic defects. Previous studies showed a broad clinical spectrum ranging from asymptomatic to recurrent hypoglycemia with/without lactic acidosis, encephalopathy, seizures, and liver failure.
    Results: In this article, we discuss the occurrence of PEPCK-C deficiency in four families from the United Arab Emirates and Oman. All patients presented with unexplained hypoglycemia as a common feature. Two out of the seven patients presented with episodes of encephalopathy that resulted in seizures and neuroregression leading to global developmental delay and one patient had a neonatal presentation. Observed biochemical abnormalities include elevated lactate, transaminases, and tricarboxylic acid cycle metabolites in most patients. Elevated creatine kinase was documented in two patients. Whole exome sequencing revealed two novel (c.574T > C, and c.1268 C > T) and a previously reported splice site (c.961 + 1G > A) PCK1 variant in the affected families.
    Conclusion: Patients become vulnerable during intercurrent illness; thus, prevention and prompt reversal of a catabolic state are crucial to avoid irreversible brain damage. This report will help to expand the clinical understanding of this rare disease and recommends screening for PEPCK-C deficiency in unexplained hypoglycemia.
    MeSH term(s) Humans ; Infant, Newborn ; Brain Diseases ; Hypoglycemia/etiology ; Intracellular Signaling Peptides and Proteins/genetics ; Liver Diseases/complications ; Phosphoenolpyruvate Carboxykinase (GTP)/genetics ; Seizures/genetics
    Chemical Substances Intracellular Signaling Peptides and Proteins ; PCK1 protein, human (EC 4.1.1.32) ; Phosphoenolpyruvate Carboxykinase (GTP) (EC 4.1.1.32)
    Language English
    Publishing date 2023-11-03
    Publishing country England
    Document type Journal Article
    ZDB-ID 2225857-7
    ISSN 1750-1172 ; 1750-1172
    ISSN (online) 1750-1172
    ISSN 1750-1172
    DOI 10.1186/s13023-023-02946-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Very long-chain acyl-CoA dehydrogenase deficiency and type I diabetes mellitus: Case report and management challenges.

    Al-Busaidi, Salim Ahmed / Al Nou'mani, Jawaher Al / Al-Falahi, Zubaida / Al-Farsi, Rajaa / Kumar, Suneel / Al-Murshedi, Fathiya / Awlad-Thani, Kathiya / Al Nabhani, Ayda / Al Alawi, Abdullah M

    Clinical biochemistry

    2023  Volume 116, Page(s) 16–19

    Abstract: Background: Very long-chain acyl-CoA dehydrogenase deficiency (VLCADD) is a rare autosomal recessive disorder of fatty acid metabolism. Its clinical presentation includes hypoketotic hypoglycemia and potentially life-threatening multiorgan dysfunction ... ...

    Abstract Background: Very long-chain acyl-CoA dehydrogenase deficiency (VLCADD) is a rare autosomal recessive disorder of fatty acid metabolism. Its clinical presentation includes hypoketotic hypoglycemia and potentially life-threatening multiorgan dysfunction.Therefore, the cornerstone of management includes avoiding fasting, dietary modification, and monitoring for complications. The co-occurrence of type 1 diabetes mellitus (DM1) with VLCADD has not been described in the literature.
    Case report: A 14-year-old male with a known diagnosis of VLCADD presented with vomiting, epigastric pain, hyperglycemia, and high anion gap metabolic acidosis. He was diagnosed with DM1 and managed with insulin therapy while maintaining his high complex carbohydrate, low long-chain fatty acids diet with medium-chain triglyceride supplementation. The primary diagnosis (VLCADD) makes the management of DM1 in this patient challenging as hyperglycemia related to the lack of insulin puts the patient at risk of intracellular glucose depletion and hence increases the risk for major metabolic decompensation.Conversely, adjustment of the dose of insulin requires more attention to avoid hypoglycemia. Both situations represent increased risks compared to managing DM1 alone and need a patient-centred approach, with close follow-up by a multidisciplinary team.
    Conclusion: We present a novel case of DM1 in a patient with VLCADD. The case describes a general management approach and highlights the challenging aspects of managing a patient with two diseases with different potentially paradoxical life-threatening complications.
    MeSH term(s) Male ; Humans ; Adolescent ; Diabetes Mellitus, Type 1/complications ; Acyl-CoA Dehydrogenase, Long-Chain ; Mitochondrial Diseases/diagnosis ; Hypoglycemia/etiology ; Hyperglycemia ; Insulins/therapeutic use ; Acyl-CoA Dehydrogenase
    Chemical Substances Acyl-CoA Dehydrogenase, Long-Chain (EC 1.3.8.8) ; Insulins ; Acyl-CoA Dehydrogenase (EC 1.3.8.7)
    Language English
    Publishing date 2023-03-07
    Publishing country United States
    Document type Case Reports
    ZDB-ID 390372-2
    ISSN 1873-2933 ; 0009-9120
    ISSN (online) 1873-2933
    ISSN 0009-9120
    DOI 10.1016/j.clinbiochem.2023.03.005
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  10. Article: Revisiting Exome Data Identified Missed Splice Site Variant of the Asparagine Synthetase (ASNS) Gene

    Al-Kasbi, Ghalia / Al-Murshedi, Fathiya / Al-Futaisi, Amna / Al-Jabry, Tariq / Zadjali, Fahad / Al-Yahyaee, Said / Al-Maawali, Almundher

    Journal of Pediatric Genetics

    2022  Volume 13, Issue 01, Page(s) 1–5

    Abstract: Next-generation sequencing, such as whole-exome sequencing (WES), is increasingly used in the study of Mendelian disorders, yet many are reported as “negative.” Inappropriate variant annotation and filtering steps are reasons for missing the molecular ... ...

    Abstract Next-generation sequencing, such as whole-exome sequencing (WES), is increasingly used in the study of Mendelian disorders, yet many are reported as “negative.” Inappropriate variant annotation and filtering steps are reasons for missing the molecular diagnosis. Noncoding variants, including splicing mutations, are examples of variants that can be overlooked. Herein, we report a family of four affected newborns, and all presented with severe congenital microcephaly. Initial research WES analysis identified a damaging homozygous variant in NME1 gene as a possible cause of primary microcephaly phenotype in these patients. However, reanalysis of the exome data uncovered a biallelic splice site variant in asparagine synthetase gene which seems to be the possible cause of the phenotype in these patients. This study highlights the importance of revisiting the exome data and the issue of “negative” exome and the afterward approaches to identify and prove new candidate genes.
    Keywords whole-exome sequencing ; candidate genes ; microcephaly
    Language English
    Publishing date 2022-10-13
    Publisher Georg Thieme Verlag KG
    Publishing place Stuttgart ; New York
    Document type Article
    ISSN 2146-460X ; 2146-4596
    ISSN (online) 2146-460X
    ISSN 2146-4596
    DOI 10.1055/s-0042-1757193
    Database Thieme publisher's database

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