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NF1 +/- Hematopoietic Cells Accelerate Malignant Peripheral Nerve Sheath Tumor Development without Altering Chemotherapy Response
Journal article   Open access   Peer reviewed

NF1 +/- Hematopoietic Cells Accelerate Malignant Peripheral Nerve Sheath Tumor Development without Altering Chemotherapy Response

Rebecca D Dodd, Chang-Lung Lee, Tess Overton, Wesley Huang, William C Eward, Lixia Luo, Yan Ma, Davis R Ingram, Keila E Torres, Diana M Cardona, …
Cancer research (Chicago, Ill.), Vol.77(16), pp.4486-4497
08/15/2017
DOI: 10.1158/0008-5472.CAN-16-2643
PMCID: PMC5839126
PMID: 28646022
url
https://doi.org/10.1158/0008-5472.CAN-16-2643View
Published (Version of record) Open Access

Abstract

Haploinsufficiency in the tumor suppressor NF1 contributes to the pathobiology of neurofibromatosis type 1, but a related role has not been established in malignant peripheral nerve sheath tumors (MPNST) where NF1 mutations also occur. Patients with NF1-associated MPNST appear to have worse outcomes than patients with sporadic MPNST, but the mechanism underlying this correlation is not understood. To define the impact of stromal genetics on the biology of this malignancy, we developed unique mouse models that reflect the genetics of patient-associated MPNST. Specifically, we used adenovirus-Cre injections to generate MPNST in Nf1 ; Ink4a/Arf and Nf1 ; Ink4a/Arf paired littermate mice to model tumors from NF1-wild-type and NF1-associated patients, respectively. In these models, Nf1 haploinsufficiency in hematopoietic cells accelerated tumor onset and increased levels of tumor-infiltrating immune cells comprised of CD11b cells, monocytes, and mast cells. We observed that mast cells were also enriched in human NF1-associated MPNST. In a coclinical trial to examine how the tumor microenvironment influences the response to multiagent chemotherapy, we found that stromal Nf1 status had no effect. Taken together, our results clarify the role of the NF1-haploinsufficient tumor microenvironment in MPNST. .
Animals Disease Models, Animal Hematopoietic Stem Cells - metabolism Hematopoietic Stem Cells - pathology Humans Mice Nerve Sheath Neoplasms - drug therapy Nerve Sheath Neoplasms - genetics Nerve Sheath Neoplasms - pathology Neurofibromatosis 1 - drug therapy Neurofibromatosis 1 - genetics Neurofibromatosis 1 - metabolism Neurofibromatosis 1 - pathology

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