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JIMD Reports

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https://www.readbyqxmd.com/read/27900673/expansion-of-the-phenotypic-spectrum-of-propionic-acidemia-with-isolated-elevated-propionylcarnitine
#1
Gerarda Cappuccio, Paldeep S Atwal, Taraka R Donti, Kiki Ugarte, Nadia Merchant, William J Craigen, V Reid Sutton, Sarah H Elsea
We report three patients with elevations of propionylcarnitine (C3), one without elevations of 2-methylcitrate and 3-hydroxypropionate in urine organic acid analysis, and the other two showing only mild elevations, all of whom were subsequently confirmed to have propionic acidemia by molecular analysis of PCCA and PCCB genes. To date, they have had a mild clinical course. These cases illustrate the importance of considering high C3 as the only biochemical abnormality in a diagnosis of propionic acidemia. Since mild C3 elevations may be overlooked and considered non-diagnostic in isolation, we advise considering a diagnosis of propionic acidemia even in the absence of significant elevations 2-methylcitrate or 3-hydroxypropionate in urine organic acid analysis...
November 30, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27858373/vitamin-b12-administration-by-subcutaneous-catheter-device-in-a-cobalamin-a-cbla-patient
#2
E Maines, G Morandi, G Gugelmo, F Ion-Popa, N Campostrini, A Pasini, M Vincenzi, F Teofoli, M Camilot, A Bordugo
Cobalamin A deficiency (cblA) is an inherited disorder of intracellular cobalamin metabolism, caused by impaired 5'-deoxy-adenosylcobalamin (AdoCbl) synthesis. Hydroxocobalamin (OHCbl) is the cornerstone of cblA treatment because vitamin B12 may completely restore AdoCbl deficiency. Parenteral administration, intravenous, subcutaneous or intramuscular, is generally required to achieve effect. Daily injections represent a problem for the parents and the caregivers, and this may lead to poor compliance and scarce adherence to the long-term treatment...
November 18, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27858372/severe-respiratory-acidosis-in-status-epilepticus-as-a-possible-etiology-of-sudden-death-in-lesch-nyhan-disease-a-case-report-and-review-of-the-literature
#3
Alison Christy, William Nyhan, Jenny Wilson
INTRODUCTION: Lesch-Nyhan disease (LND) is an X-linked disorder of purine metabolism, associated with self-mutilation, dystonia, and chorea. Seizures are uncommon in LND. Patients with LND are at risk for sudden and unexpected death. The etiology of this is unknown, but appears to occur from a respiratory process. We propose that respiratory failure secondary to subclinical seizure may lead to sudden death in these patients. CASE: We report a case of an 11-year-old boy with LND who had two episodes of nocturnal gasping...
November 18, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27858371/hyperammonemia-as-a-presenting-feature-in-two-siblings-with-fbxl4-variants
#4
Sarah U Morton, Edward G Neilan, Roy W A Peake, Jiahai Shi, Klaus Schmitz-Abe, Meghan Towne, Kyriacos Markianos, Sanjay P Prabhu, Pankaj B Agrawal
Early-onset mitochondrial encephalomyopathy is a rare disorder that presents in the neonatal period with lactic acidosis, hypotonia, and developmental delay. Sequence variants in the nuclear-encoded gene FBXL4 have been previously demonstrated to be a cause of early-onset mitochondrial encephalomyopathy in several unrelated families. We have identified a pair of siblings with mutations in FBXL4 who each presented in the neonatal period with hyperammonemia, low plasma levels of aspartate, low urine levels of tricarboxylic acid cycle intermediates suggesting a defect in anaplerosis, and cerebellar hypoplasia in addition to lactic acidosis and other classic signs of mitochondrial encephalomyopathy...
November 18, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27858370/intracranial-hypertension-in-cystinosis-is-a-challenge-experience-in-a-children-s-hospital
#5
Nieves Martín-Begué, Silvia Alarcón, Charlotte Wolley-Dod, Luis Enrique Lara, Álvaro Madrid, Paola Cano, Mireia Del Toro, Gema Ariceta
BACKGROUND: Cystinosis is a rare systemic lysosomal disease affecting mainly the kidney and eye. Ocular involvement in cystinosis is universal being the presence of cystine crystals in the cornea a diagnostic criterion and one of the earliest manifestations of the disease. Neuro-ophthalmologic manifestations are considered a rare and late complication in these patients. The aim of this article is to report the unexpectedly high incidence of intracranial hypertension in children with cystinosis at our centre...
November 18, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27858369/cerebrotendinous-xanthomatosis-presenting-with-infantile-spasms-and-intellectual-disability
#6
Austin Larson, James D Weisfeld-Adams, Tim A Benke, Penelope E Bonnen
Cerebrotendinous xanthomatosis (CTX) is an inborn error of metabolism leading to progressive multisystem disease. Symptoms often begin in the first decade of life with chronic diarrhea, cataracts, developmental delay, intellectual disability, and cerebellar or pyramidal dysfunction. Later manifestations include tendon xanthomas, polyneuropathy, and abnormal neuroimaging. Pathogenic biallelic variants in CYP27A1 leading to compromised function of sterol 27-hydroxylase result in accumulation of detectable toxic intermediates of bile acid synthesis rendering both genetic and biochemical testing effective diagnostic tools...
November 18, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27815844/incidence-and-geographic-distribution-of-succinic-semialdehyde-dehydrogenase-ssadh-deficiency
#7
Savita Verma Attri, Pratibha Singhi, Natrujee Wiwattanadittakul, Jyotindra N Goswami, Naveen Sankhyan, Gajja S Salomons, Jean-Baptiste Roullett, Ryan Hodgeman, Mahsa Parviz, K Michael Gibson, Phillip L Pearl
The incidence of succinic semialdehyde dehydrogenase (SSADH) deficiency, an autosomal recessive inherited disorder of GABA degradation, is unknown. Upon a recent diagnosis of a new family of affected fraternal twins from the Punjabi ethnic group of India, case ascertainment from the literature and our database was done to determine the number of confirmed cases along with their geographic distribution. The probands presented with global developmental delay, infantile onset epilepsy, and a persistent neurodevelopmental disorder upon diagnosis at 10 years of age with intellectual disability, expressive aphasia, and behavioral problems most prominent for hyperactivity...
November 5, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27815843/coxpd9-an-evolving-multisystem-disease-congenital-lactic-acidosis-sensorineural-hearing-loss-hypertrophic-cardiomyopathy-cirrhosis-and-interstitial-nephritis
#8
C Bursle, A Narendra, R Chuk, J Cardinal, R Justo, B Lewis, D Coman
We present the second report of combined oxidative phosphorylation deficiency-9. The infant presented in the neonatal period with poor feeding, lactic acidosis and sensorineural hearing loss. He subsequently developed a lethal hypertrophic cardiomyopathy during infancy. Cirrhosis and interstitial nephritis were identified at autopsy. Exome sequencing has detected compound heterozygous mutations in the MRPL3 gene which encodes a large mitochondrial ribosome subunit protein. We identified a known heterozygous variant NM_007208 c...
November 5, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27783330/inhaled-sargramostim-induces-resolution-of-pulmonary-alveolar-proteinosis-in-lysinuric-protein-intolerance
#9
Laura M Tanner, Johanna Kurko, Maaria Tringham, Heikki Aho, Juha Mykkänen, Kirsti Näntö-Salonen, Harri Niinikoski, Heikki Lukkarinen
Pulmonary alveolar proteinosis (PAP) is a potentially fatal complication of lysinuric protein intolerance (LPI), an inherited disorder of cationic amino acid transport. The patients often present with mild respiratory symptoms, which may rapidly progress to acute respiratory failure responding poorly to conventional treatment with steroids and bronchoalveolar lavations (BALs). The pathogenesis of PAP in LPI is still largely unclear. In previous studies, we have shown disturbances in the function and activity of alveolar macrophages of these patients, suggesting that increasing the activity and the number of macrophages by recombinant human GM-CSF (rhuGM-CSF) might be beneficial in this patient group...
October 26, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27718212/table-of-phenylalanine-content-of-foods-comparative-analysis-of-data-compiled-in-food-composition-tables
#10
Ana Claudia Marquim F Araújo, Wilma M C Araújo, Ursula M Lanfer Marquez, Rita Akutsu, Eduardo Y Nakano
BACKGROUND: Knowing the phenylalanine (Phe) content of foods is essential for managing the diet of patients with phenylketonuria. Data on the Phe content of foods are scarce and sometimes vary between different Food Composition Tables (FCT). Brazil created its own table of the Phe contents of fruits and vegetables based exclusively on the chemical analysis of protein content, considering that proteins contain 3-4% Phe (TCFA/ANVISA). This study compared the protein and Phe contents of vegetables and fruits provided by the TCFA/ANVISA with those listed in international food composition tables...
October 8, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27683254/rars2-mutations-is-pontocerebellar-hypoplasia-type-6-a-mitochondrial-encephalopathy
#11
Tessa van Dijk, Fred van Ruissen, Bregje Jaeger, Richard J Rodenburg, Saskia Tamminga, Merel van Maarle, Frank Baas, Nicole I Wolf, Bwee Tien Poll-The
Mutations in the mitochondrial arginyl tRNA synthetase (RARS2) gene are associated with Pontocerebellar Hypoplasia type 6 (PCH6). Here we report two patients, compound heterozygous for RARS2 mutations, presenting with early onset epileptic encephalopathy and (progressive) atrophy of both supra- and infratentorial structures. Early pontocerebellar hypoplasia was virtually absent and respiratory chain (RC) defects could not be detected in muscle biopsies. Both patients carried a novel missense mutation c.1544A>G (p...
September 29, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27677920/improved-measurement-of-brain-phenylalanine-and-tyrosine-related-to-neuropsychological-functioning-in-phenylketonuria
#12
Susan E Waisbren, Sanjay P Prabhu, Patricia Greenstein, Carter Petty, Donald Schomer, Vera Anastasoaie, Kalin Charette, Daniel Rodriguez, Sai Merugumala, Alexander P Lin
INTRODUCTION: Researchers hypothesized that in phenylketonuria (PKU) high brain phenylalanine (Phe) levels and low brain tyrosine (Tyr) levels affect neuropsychological functioning. However, traditional magnetic resonance spectroscopy (MRS) yielded uncertain results of brain Phe and could not adequately measure brain Tyr. This pilot study examined the potential of correlated spectroscopy (COSY) to quantify these biomarkers and explain variability in neuropsychological functioning. METHODS: Nine adults with early treated classic PKU received magnetic resonance imaging (MRI) with COSY and a battery of neuropsychological tests...
September 28, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27620484/peak-jump-power-reflects-the-degree-of-ambulatory-ability-in-patients-with-mitochondrial-and-other-rare-diseases
#13
Christopher Newell, Barbara Ramage, Alberto Nettel-Aguirre, Ion Robu, Aneal Khan
Metabolic diseases that lead to neuromuscular, bone, and joint involvement can reduce ambulation and quality of life. Using jumping mechanography, we developed a novel assessment, peak jump power (PJP), and related this to ambulatory ability in patients either having a known or suspected underlying rare disease. From adults and children, we recruited 88 healthy controls and 115 patients (61 with mitochondrial disease and 54 with another diagnosis). Patients were categorized as having no complaints of weakness or ambulation (ambulatory competent; AC), weakness but able to ambulate without aids (ambulatory weakness; AW), or not able to ambulate without aids such as a walker, cane, or wheelchair (ambulatory assistance; AA)...
September 13, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27604842/leukoencephalopathy-due-to-complex-ii-deficiency-and-bi-allelic-sdhb-mutations-further-cases-and-implications-for-genetic-counselling
#14
Sabine Grønborg, Niklas Darin, Maria J Miranda, Bodil Damgaard, Jorge Asin Cayuela, Anders Oldfors, Gittan Kollberg, Thomas V O Hansen, Kirstine Ravn, Flemming Wibrand, Elsebet Østergaard
Isolated complex II deficiency is a rare cause of mitochondrial disease and bi-allelic mutations in SDHB have been identified in only a few patients with complex II deficiency and a progressive neurological phenotype with onset in infancy. On the other hand, heterozygous SDHB mutations are a well-known cause of familial paraganglioma/pheochromocytoma and renal cell cancer. Here, we describe two additional patients with respiratory chain deficiency due to bi-allelic SDHB mutations. The patients' clinical, neuroradiological, and biochemical phenotype is discussed according to current knowledge on complex II and SDHB deficiency and is well in line with previously described cases, thus confirming the specific neuroradiological presentation of complex II deficiency that recently has emerged...
September 8, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27571996/lethal-neonatal-ltbl-associated-with-biallelic-ears2-variants-case-report-and-review-of-the-reported-neuroradiological-features
#15
Renata Oliveira, Ewen W Sommerville, Kyle Thompson, Joana Nunes, Angela Pyle, Manuela Grazina, Patrick F Chinnery, Luísa Diogo, Paula Garcia, Robert W Taylor
Mitochondrial translation defects are important causes of early onset mitochondrial disease. Although the biochemical (combined respiratory chain deficiency) signature and neuroimaging are usually distinctive, they are not diagnostic as the genetic origin of mitochondrial translation defects is heterogeneous. We report a female child, born at term to non-consanguineous parents, who exhibited global hypotonia, failure to thrive, persistent and progressive hyperlactacidaemia with lactic acidosis, liver dysfunction and encephalopathy and died at the age of 5 months...
August 30, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27557812/delayed-infusion-reactions-to-enzyme-replacement-therapies
#16
Zahra Karimian, Chester B Whitley, Kyle D Rudser, Jeanine R Jarnes Utz
BACKGROUND: There are currently ten intravenous enzyme replacement therapy (ERT) products available for the treatment of eight different lysosomal diseases (LD) in the USA. Additional ERT products are in clinical trials. The most common ERT adverse events are infusion reactions (IR). While IR are often defined as hypersensitivity or anaphylactoid reactions occurring concurrently with (i.e., during) infusion administration (CIR), there exists the potential for delayed infusion reactions (DIR), which present after completion of infusion administration...
August 25, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27557811/novel-pex3-gene-mutations-resulting-in-a-moderate-zellweger-spectrum-disorder
#17
C Maxit, I Denzler, D Marchione, G Agosta, J Koster, R J A Wanders, S Ferdinandusse, H R Waterham
BACKGROUND: Peroxisome biogenesis disorders (PBDs) may have a variable clinical expression, ranging from severe, lethal to mild phenotypes with progressive evolution. PBDs are autosomal recessive disorders caused by mutations in PEX genes, which encode proteins called peroxins, involved in the assembly of the peroxisome. PATIENT DESCRIPTION: We herein report a patient who is currently 9 years old and who is compound heterozygous for two novel mutations in the PEX3 gene...
August 25, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27539578/novel-homozygous-missense-mutation-in-spg20-gene-results-in-troyer-syndrome-associated-with-mitochondrial-cytochrome-c-oxidase-deficiency
#18
Ronen Spiegel, Devorah Soiferman, Avraham Shaag, Stavit Shalev, Orly Elpeleg, Ann Saada
Troyer syndrome is an autosomal recessive form of hereditary spastic paraplegia (HSP) caused by deleterious mutations in the SPG20 gene. Although the disease is associated with a loss of function mechanism of spartin, the protein encoded by SPG20, the precise pathogenesis is yet to be elucidated. Recent data indicated an important role for spartin in both mitochondrial maintenance and function. Here we report a child presenting with progressive spastic paraparesis, generalized muscle weakness, dysarthria, impaired growth, and severe isolated decrease in muscle cytochrome c oxidase (COX) activity...
August 19, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27518780/paracentric-inversion-of-chromosome-21-leading-to-disruption-of-the-hlcs-gene-in-a-family-with-holocarboxylase-synthetase-deficiency
#19
Shane C Quinonez, Andrea H Seeley, Cindy Lam, Thomas W Glover, Bruce A Barshop, Catherine E Keegan
Holocarboxylase synthetase (HLCS) deficiency is a rare autosomal recessive disorder that presents with multiple life-threatening metabolic derangements including metabolic acidosis, ketosis, and hyperammonemia. A majority of HLCS deficiency patients respond to biotin therapy; however, some patients show only a partial or no response to biotin therapy. Here, we report a neonatal presentation of HLCS deficiency with partial response to biotin therapy. Sequencing of HLCS showed a novel heterozygous mutation in exon 5, c...
August 13, 2016: JIMD Reports
https://www.readbyqxmd.com/read/27518779/very-long-chain-acyl-coenzyme-a-dehydrogenase-deficiency-and-perioperative-management-in-adult-patients
#20
M M Welsink-Karssies, J A W Polderman, E J Nieveen van Dijkum, B Preckel, W S Schlack, G Visser, C E Hollak, J Hermanides
Surgery and anesthesia pose a threat to patients with very long-chain acyl-CoA dehydrogenase deficiency (VLCADD), because prolonged fasting, stress, and pain are known risk factors for the induction of metabolic derangement. The optimal perioperative management in these patients is unknown and the use of volatile agents and agents dissolved in fatty acids has been related to postoperative metabolic complications. However, the occurrence of metabolic derangement is multifactorial and depends, amongst others, on the severity of the mutation and residual enzyme activity...
August 13, 2016: JIMD Reports
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