Infantile-onset multisystem neurologic, endocrine, and pancreatic disease (IMNEPD) has been recently linked to biallelic mutation of the peptidyl-tRNA hydrolase 2 gene PTRH2. Two index patients with IMNEPD in the original report had multiple neurological symptoms such as postnatal microcephaly, intellectual disability, developmental delay, sensorineural deafness, cerebellar atrophy, ataxia, and peripheral neuropathy. In addition, distal muscle weakness and abnormalities of thyroid, pancreas, and liver were found. Here, we report five further IMNEPD patients with a different homozygous PTRH2 mutation, broaden the phenotypic spectrum of the disease and differentiate common symptoms and interindividual variability in IMNEPD associated with a unique mutation. We thereby hope to better define IMNEPD and promote recognition and diagnosis of this novel disease entity.
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http://dx.doi.org/10.1186/s13023-016-0433-z | DOI Listing |
Genes (Basel)
November 2024
Unit of Human Biology and Genetics, The Triangle Regional Research and Development Center, Kafr Qari 3007500, Israel.
Background/objectives: Biallelic mutations in the gene are associated with a rare genetic disease known as infantile-onset multisystem neurologic, endocrine, and pancreatic disease (IMNEPD). In this study, we describe a new case carrying a previously identified mutation, provide an updated analysis of the relative frequencies of the clinical features across all published cases (including the three latest studies), and perform a bioinformatics analysis of the newly identified PTRH2 protein variants from a structural perspective.
Methods: Clinical examination of the patients was carried out, and genetic testing was performed using a genome sequencing strategy.
Cureus
November 2024
Rare Diseases, Rare Diseases Community (RDCom), Buenos Aires, ARG.
Pompe disease (PD) is a rare progressive autosomal recessive disorder resulting from the deficiency of acid alpha-glucosidase (GAA) enzyme activity. Due to its multisystemic involvement, PD leads to significant morbidity and impacts patients' quality of life. Despite the availability of approved disease-modifying treatments, the prompt diagnosis and management of PD, which are crucial for patient outcomes, still present several challenges.
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October 2024
Pediatric Neurology, Aster CMI Hospital, Bengaluru, IND.
Williams syndrome is a multisystem disorder characterized by developmental delay, characteristic facial features, growth abnormalities, and cardiovascular abnormalities. The disorder is an autosomal dominant genetic syndrome that occurs due to microdeletion at chromosomal locus 7q11.23.
View Article and Find Full Text PDFNeurol Genet
October 2024
From the APHP (E.B., C.G.), Service de Neurologie, Hôpital Raymond Poincaré, Garches; APHP (E.B., C.G.), Centre de référence Nord-Est-Ile-de-France, FHU PHENIX; Université de Versailles Saint-Quentin-en-Yvelines (E.B.), U 1179 INSERM, Paris-Saclay; Centre de Biologie Est (P.L., L.V.), Hospices Civils, Lyon; Department of Pediatric Radiology (K.L.), Hôpital Necker-Enfants Malades, Paris; Sorbonne Université (N.B.R., T.E.), UMRS974, - INSERM, Centre de Recherche en Myologie, Institut de Myologie Paris; APHP (N.B.R., E.L., T.E.), Unité de Morphologie neuromusculaire, Centre de référence des maladies neuromusculaires Nord-Est-Ile-de-France; and APHP (T.S.), Sorbonne Université, Service de Neuromyologie, Centre de référence Nord-Est-Ile-de-France, Institut de Myologie, Hôpital Pitié-Salpêtrière, Paris, France.
J Peripher Nerv Syst
June 2024
IRCCS Ospedale Policlinico San Martino, UOC Medical Genetics, Genoa, Italy.
Aim: Biallelic mutations in the PTRH2 gene have been associated with infantile multisystem neurological, endocrine, and pancreatic disease (IMNEPD), a rare autosomal recessive disorder of variable expressivity characterized by global developmental delay, intellectual disability or borderline IQ level, sensorineural hearing loss, ataxia, and pancreatic insufficiency. Various additional features may be included, such as peripheral neuropathy, facial dysmorphism, hypothyroidism, hepatic fibrosis, postnatal microcephaly, cerebellar atrophy, and epilepsy. Here, we report the first Italian family presenting only predominant neurological features.
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