2009
DOI: 10.1016/j.bone.2008.10.050
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Congenital pseudarthrosis of neurofibromatosis type 1: Impaired osteoblast differentiation and function and altered NF1 gene expression

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Cited by 52 publications
(47 citation statements)
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“…Two of them were "de novo" mutations, and the others originated from their parents. Similar to previous studies [8,11,12,16], our results further confirmed that CPT always existed in the NF1 families and each patient with both NF1 and CPT was found harboring mutations in the NF1 gene, suggesting these mutations were closely associated with the complex phenotypes. In addition, the age of patients sustaining tibial fracture was found to be distinctly different.…”
Section: Discussionsupporting
confidence: 90%
See 1 more Smart Citation
“…Two of them were "de novo" mutations, and the others originated from their parents. Similar to previous studies [8,11,12,16], our results further confirmed that CPT always existed in the NF1 families and each patient with both NF1 and CPT was found harboring mutations in the NF1 gene, suggesting these mutations were closely associated with the complex phenotypes. In addition, the age of patients sustaining tibial fracture was found to be distinctly different.…”
Section: Discussionsupporting
confidence: 90%
“…A majority of the cells of this hamartoma have been identified as fibroblasts [7]. A certain amount of fibrocartilage and hyaline cartilage [8] is also associated with the fibrous tissue, as well as, several areas of endochondral ossification. The composition of the pseudarthrotic tissue does not vary significantly, irrespective of its association with NF1 [9].…”
Section: Introductionmentioning
confidence: 90%
“…Stevenson et al 16 suggested double inactivation of the Nf1 gene in fibrous hamartoma tissue as a pathogenic mechanism, but this contradicts with the longstanding view that NF1 bone dysplasia arises due to an abnormal response of Nf1 haploinsufficient periosteum to mechanical force. 11,26 Leskela et al 8 reported not finding LOH in their study of mesenchymal stem cells cultured from red bone marrow next to sites of pseudarthrosis. But this study was not conducted on tissues from sites of pseudarthrosis.…”
Section: Discussionmentioning
confidence: 99%
“…8 Neurofibromin negatively regulates the activity of an intracellular signaling molecule p21 ras (Ras) by functioning as a GTPase activating protein (Ras-GAP). 9,10 Furthermore, haploinsufficiency or a complete deficiency in Nf1 results in a dose-dependent elevation in Ras activity, which can activate the MAPK (mitogen-activated protein kinase) and the PI-3K (phosphatidylinositol-3-phosphate kinase) pathways.…”
mentioning
confidence: 99%
“…Presentation occurs from infancy to childhood as tibial dysplasia, with anterolateral bowing, eventually leading to pathological fracture, which typically occurs at the junction of the middle and distal thirds of the tibia [1][2][3][4][5]. Neurofibromatosis type 1 (NF), (Von Recklinghausen's disease), is a genetic disorder frequently associated with CPT [3,6] and bone remodelling defects are further exaggerated in this condition [4][5][6][7].…”
mentioning
confidence: 99%