Reconstitution of the NF1 GAP-related domain in NF1-deficient human Schwann cells.

Abstract:

:Schwann cells derived from peripheral nerve sheath tumors from individuals with Neurofibromatosis Type 1 (NF1) are deficient for the protein neurofibromin, which contains a GAP-related domain (NF1-GRD). Neurofibromin-deficient Schwann cells have increased Ras activation, increased proliferation in response to certain growth stimuli, increased angiogenic potential, and altered cell morphology. This study examined whether expression of functional NF1-GRD can reverse the transformed phenotype of neurofibromin-deficient Schwann cells from both benign and malignant peripheral nerve sheath tumors. We reconstituted the NF1-GRD using retroviral transduction and examined the effects on cell morphology, growth potential, and angiogenic potential. NF1-GRD reconstitution resulted in morphologic changes, a 16-33% reduction in Ras activation, and a 53% decrease in proliferation in neurofibromin-deficient Schwann cells. However, NF1-GRD reconstitution was not sufficient to decrease the in vitro angiogenic potential of the cells. This study demonstrates that reconstitution of the NF1-GRD can at least partially reverse the transformation of human NF1 tumor-derived Schwann cells.

authors

Thomas SL,Deadwyler GD,Tang J,Stubbs EB Jr,Muir D,Hiatt KK,Clapp DW,De Vries GH

doi

10.1016/j.bbrc.2006.07.159

subject

Has Abstract

pub_date

2006-09-29 00:00:00

pages

971-80

issue

3

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(06)01704-9

journal_volume

348

pub_type

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