Noonan-like/multiple giant cell lesion (NS/MGCL) is a rare condition overlapping with Noonan syndrome. Once thought to be a specific and separate entity, it is now suggested to be a variant of the Noonan syndrome spectrum. We report the case of an 8-year-old boy with a typical clinical picture of Noonan syndrome with a de novo germline mutation of PTPN11 (c.854 T>C). During his follow-up, the patient developed multifocal pigmented villonodular synovitis which first affected the left knee and shortly after both elbows.
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http://dx.doi.org/10.1155/2018/7698052 | DOI Listing |
Proteins
December 2024
Stem Cell Biology, and Regenerative Medicine Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran.
The pathogenic G361A variant of CRAF, associated with increased intrinsic kinase activity in Noonan syndrome (NS), remains poorly understood in terms of its molecular and structural impact on kinase activity. To elucidate the mechanistic implications of the glycine to alanine substitution at residue 361 in CRAF, we employed molecular dynamics simulations. Our findings reveal that this mutation predominantly affects the ATP binding pocket and critical intermolecular interactions within the active cleft that favors the phosphate transfer reaction.
View Article and Find Full Text PDFFront Genet
December 2024
Department of Pediatrics, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China.
Background: Noonan syndrome (NS) is a rare group of autosomal genetic disorders. In recent years, with the exploration and development of molecular diagnostic techniques, more and more researchers have begun to pay attention to NS. However, there is still a lack of reports on the bibliometric analysis of NS worldwide.
View Article and Find Full Text PDFEur J Pediatr
December 2024
Department of Medical Genetics, Dr. Behçet Uz Children's Hospital, Izmir, Turkey.
Unlabelled: The RASopathies are a group of disorders resulting from a germline variant in the genes encoding the Ras/mitogen-activated protein kinase pathway. These disorders include Noonan syndrome (NS), cardiofaciocutaneous syndrome (CFC), Costello syndrome (CS), Legius syndrome (LS), and neurofibromatosis type 1 (NF1), and have overlapping clinical features due to RAS/MAPK dysfunction. In this study, we aimed to describe the clinical and molecular features of patients exhibiting phenotypic manifestations consistent with RASopathies.
View Article and Find Full Text PDFEur J Pediatr
December 2024
Dept. of Research and Development, SeysCentra, Malden, The Netherlands.
Unlabelled: Children with Noonan syndrome-like RASopathies are at increased risk for developing feeding problems due to comorbid organic impairments at an early age, such as gastrointestinal problems or other organicity. Their feeding problems can ultimately often be classified as avoidant/restrictive food intake disorder, for which behavioral therapy is the first-choice treatment. The research question in this study is whether this treatment leads to similar results as in children without these RASopathies.
View Article and Find Full Text PDFHum Brain Mapp
December 2024
Division of Interdisciplinary Brain Sciences, Department of Psychiatry and Behavioral Sciences, Stanford University, Palo Alto, California, USA.
Neurodevelopmental disorders (NDDs) can severely impact functioning yet effective treatments are limited. Greater insight into the neurobiology underlying NDDs is critical to the development of successful treatments. Using a genetics-first approach, we investigated the potential of advanced diffusion-weighted imaging (DWI) techniques to characterize the neural microstructure unique to neurofibromatosis type 1 (NF1) and Noonan syndrome (NS).
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