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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Kazmi, Syed J. Byer, Stephanie J. Eckert, Jenell M. Turk, Amy N. Huijbregts, Richard P. H. Brossier, Nicole M. Grizzle, William E. Mikhail, Fady M. Roth, Kevin A. Carroll, Steven L. |
| Description | Country affiliation: United States Author Affiliation: Kazmi SJ ( Department of Pathology, The University of Alabama at Birmingham, Birmingham, Alabama 35294-0017, USA.) |
| Abstract | Patients with neurofibromatosis type 1 (NF1) develop benign plexiform neurofibromas that frequently progress to become malignant peripheral nerve sheath tumors (MPNSTs). A genetically engineered mouse model that accurately models plexiform neurofibroma-MPNST progression in humans would facilitate identification of somatic mutations driving this process. We previously reported that transgenic mice overexpressing the growth factor neuregulin-1 in Schwann cells (P(0)-GGFß3 mice) develop MPNSTs. To determine whether P(0)-GGFß3 mice accurately model human neurofibroma-MPNST progression, cohorts of these animals were monitored through death and were necropsied; 94% developed multiple neurofibromas, with 70% carrying smaller numbers of MPNSTs. Nascent MPNSTs were identified within neurofibromas, suggesting that these sarcomas arise from neurofibromas. Although neurofibromin expression was maintained, P(0)-GGFß3 MPNSTs exhibited Ras hyperactivation, as in human NF1-associated MPNSTs. P(0)-GGFß3 MPNSTs also exhibited abnormalities in the p16(INK4A)-cyclin D/CDK4-Rb and p19(ARF)-Mdm-p53 pathways, analogous to their human counterparts. Array comparative genomic hybridization (CGH) demonstrated reproducible chromosomal alterations in P(0)-GGFß3 MPNST cells (including universal chromosome 11 gains) and focal gains and losses affecting 39 neoplasia-associated genes (including Pten, Tpd52, Myc, Gli1, Xiap, and Bbc3/PUMA). Array comparative genomic hybridization also identified recurrent focal copy number variations affecting genes not previously linked to neurofibroma or MPNST pathogenesis. We conclude that P(0)-GGFß3 mice represent a robust model of neurofibroma-MPNST progression useful for identifying novel genes driving neurofibroma and MPNST pathogenesis. |
| File Format | HTM / HTML |
| ISSN | 00029440 |
| e-ISSN | 15252191 |
| DOI | 10.1016/j.ajpath.2012.11.017 |
| Journal | The American Journal of Pathology |
| Issue Number | 3 |
| Volume Number | 182 |
| Language | English |
| Publisher | Elsevier (on behalf of the American Society for Investigative Pathology) |
| Publisher Date | 2013-03-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Dna Copy Number Variations Research Support, N.i.h., Extramural Neurofibromin 1 Peripheral Nervous System Nerve Sheath Neoplasms Neuregulin-1 Genetics Disease Models, Animal Research Support, U.s. Gov't, Non-p.h.s. Tumor Markers, Biological Signal Transduction Mice, Inbred C57bl Mice, Transgenic Discipline Pathology Metabolism Chromosomes, Mammalian Disease Progression Pathology Animals Base Pairing Cell Cycle Comparative Genomic Hybridization Cell Transformation, Neoplastic Ras Proteins Mice Neurofibroma |
| Content Type | Text |
| Resource Type | Article |
| Subject | Pathology and Forensic Medicine |
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